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authorLi-Ta Lo <ollie@lanl.gov>2005-01-10 23:16:22 +0000
committerLi-Ta Lo <ollie@lanl.gov>2005-01-10 23:16:22 +0000
commit883b8793c9777544101261ebcbed6088e0df1593 (patch)
tree821dfaf9181d0f5be523c21f3c75cc77fbce427f /src/devices/emulator
parent7ee97999ad03c2134049ba4554e1f5036924cd6d (diff)
added PCI expansion ROM support,
works for some ATI and Nvidia AGP cards now. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1851 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/devices/emulator')
-rw-r--r--src/devices/emulator/Config.lb4
-rw-r--r--src/devices/emulator/biosemu.c335
-rw-r--r--src/devices/emulator/pcbios/Config.lb1
-rw-r--r--src/devices/emulator/pcbios/pcibios.c142
-rw-r--r--src/devices/emulator/pcbios/pcibios.h24
-rw-r--r--src/devices/emulator/x86emu/Config.lb7
-rw-r--r--src/devices/emulator/x86emu/LICENSE17
-rw-r--r--src/devices/emulator/x86emu/debug.c425
-rw-r--r--src/devices/emulator/x86emu/debug.h213
-rw-r--r--src/devices/emulator/x86emu/decode.c1147
-rw-r--r--src/devices/emulator/x86emu/decode.h87
-rw-r--r--src/devices/emulator/x86emu/fpu.c945
-rw-r--r--src/devices/emulator/x86emu/fpu.h61
-rw-r--r--src/devices/emulator/x86emu/ops.c5427
-rw-r--r--src/devices/emulator/x86emu/ops.h45
-rw-r--r--src/devices/emulator/x86emu/ops2.c1764
-rw-r--r--src/devices/emulator/x86emu/prim_asm.h971
-rw-r--r--src/devices/emulator/x86emu/prim_ops.c2442
-rw-r--r--src/devices/emulator/x86emu/prim_ops.h231
-rw-r--r--src/devices/emulator/x86emu/sys.c595
-rw-r--r--src/devices/emulator/x86emu/validate.c789
-rw-r--r--src/devices/emulator/x86emu/x86emui.h105
22 files changed, 15777 insertions, 0 deletions
diff --git a/src/devices/emulator/Config.lb b/src/devices/emulator/Config.lb
new file mode 100644
index 0000000000..348880b1a8
--- /dev/null
+++ b/src/devices/emulator/Config.lb
@@ -0,0 +1,4 @@
+object biosemu.o
+
+dir pcbios
+dir x86emu
diff --git a/src/devices/emulator/biosemu.c b/src/devices/emulator/biosemu.c
new file mode 100644
index 0000000000..02884035a5
--- /dev/null
+++ b/src/devices/emulator/biosemu.c
@@ -0,0 +1,335 @@
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+
+#include <x86emu/x86emu.h>
+
+#define MEM_WB(where, what) wrb(where, what)
+#define MEM_WW(where, what) wrw(where, what)
+#define MEM_WL(where, what) wrl(where, what)
+
+#define MEM_RB(where) rdb(where)
+#define MEM_RW(where) rdw(where)
+#define MEM_RL(where) rdl(where)
+
+u8 x_inb(u16 port);
+u16 x_inw(u16 port);
+void x_outb(u16 port, u8 val);
+void x_outw(u16 port, u16 val);
+u32 x_inl(u16 port);
+void x_outl(u16 port, u32 val);
+
+/* general software interrupt handler */
+u32 getIntVect(int num)
+{
+ return MEM_RW(num << 2) + (MEM_RW((num << 2) + 2) << 4);
+}
+
+/* FixME: There is already a push_word() in the emulator */
+void pushw(u16 val)
+{
+ X86_ESP -= 2;
+ MEM_WW(((u32) X86_SS << 4) + X86_SP, val);
+}
+
+int run_bios_int(int num)
+{
+ u32 eflags;
+
+ eflags = X86_EFLAGS;
+ pushw(eflags);
+ pushw(X86_CS);
+ pushw(X86_IP);
+ X86_CS = MEM_RW((num << 2) + 2);
+ X86_IP = MEM_RW(num << 2);
+
+ printk_debug("%s: INT %x CS:IP = %x:%x\n", __FUNCTION__,
+ num, MEM_RW((num << 2) + 2), MEM_RW(num << 2));
+
+ return 1;
+}
+
+u8 x_inb(u16 port)
+{
+ u8 val;
+
+ val = inb(port);
+
+ if (port != 0x40)
+ printk_debug("inb(0x%04x) = 0x%02x\n", port, val);
+
+ return val;
+}
+
+u16 x_inw(u16 port)
+{
+ u16 val;
+
+ val = inw(port);
+
+ printk_debug("inw(0x%04x) = 0x%04x\n", port, val);
+ return val;
+}
+
+u32 x_inl(u16 port)
+{
+ u32 val;
+
+ val = inl(port);
+
+ printk_debug("inl(0x%04x) = 0x%08x\n", port, val);
+ return val;
+}
+
+void x_outb(u16 port, u8 val)
+{
+ if (port != 0x43)
+ printk_debug("outb(0x%02x, 0x%04x)\n", val, port);
+ outb(val, port);
+}
+
+void x_outw(u16 port, u16 val)
+{
+ printk_debug("outw(0x%04x, 0x%04x)\n", val, port);
+ outw(val, port);
+}
+
+void x_outl(u16 port, u32 val)
+{
+ printk_debug("outl(0x%08x, 0x%04x)\n", val, port);
+ outl(val, port);
+}
+
+X86EMU_pioFuncs myfuncs = {
+ x_inb, x_inw, x_inl,
+ x_outb, x_outw, x_outl
+};
+
+
+
+/* Interrupt multiplexer */
+
+void do_int(int num)
+{
+ int ret = 0;
+
+ printk_debug("int%x vector at %x\n", num, getIntVect(num));
+
+ switch (num) {
+#ifndef _PC
+ case 0x10:
+ case 0x42:
+ case 0x6D:
+ if (getIntVect(num) == 0x0000) {
+ printk_debug("un-inited int vector\n");
+ return 1;
+ }
+ if (getIntVect(num) == 0xFF065) {
+ //ret = int42_handler();
+ ret = 1;
+ }
+ break;
+#endif
+ case 0x15:
+ //ret = int15_handler();
+ ret = 1;
+ break;
+ case 0x16:
+ //ret = int16_handler();
+ ret = 0;
+ break;
+ case 0x1A:
+ ret = pcibios_handler();
+ break;
+ case 0xe6:
+ //ret = intE6_handler();
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ if (!ret)
+ ret = run_bios_int(num);
+
+ if (!ret) {
+ printk_debug("\nint%x: not implemented\n", num);
+ x86emu_dump_xregs();
+ }
+}
+#define SYS_BIOS 0xf0000
+/*
+ * here we are really paranoid about faking a "real"
+ * BIOS. Most of this information was pulled from
+ * dosemu.
+ */
+void setup_int_vect(void)
+{
+ int i;
+
+ /* let the int vects point to the SYS_BIOS seg */
+ for (i = 0; i < 0x80; i++) {
+ MEM_WW(i << 2, 0);
+ MEM_WW((i << 2) + 2, SYS_BIOS >> 4);
+ }
+
+ reset_int_vect();
+
+ /* font tables default location (int 1F) */
+ MEM_WW(0x1f << 2, 0xfa6e);
+ /* int 11 default location (Get Equipment Configuration) */
+ MEM_WW(0x11 << 2, 0xf84d);
+ /* int 12 default location (Get Conventional Memory Size) */
+ MEM_WW(0x12 << 2, 0xf841);
+ /* int 15 default location (I/O System Extensions) */
+ MEM_WW(0x15 << 2, 0xf859);
+ /* int 1A default location (RTC, PCI and others) */
+ MEM_WW(0x1a << 2, 0xff6e);
+ /* int 05 default location (Bound Exceeded) */
+ MEM_WW(0x05 << 2, 0xff54);
+ /* int 08 default location (Double Fault) */
+ MEM_WW(0x08 << 2, 0xfea5);
+ /* int 13 default location (Disk) */
+ MEM_WW(0x13 << 2, 0xec59);
+ /* int 0E default location (Page Fault) */
+ MEM_WW(0x0e << 2, 0xef57);
+ /* int 17 default location (Parallel Port) */
+ MEM_WW(0x17 << 2, 0xefd2);
+ /* fdd table default location (int 1e) */
+ MEM_WW(0x1e << 2, 0xefc7);
+
+ /* Set Equipment flag to VGA */
+ i = MEM_RB(0x0410) & 0xCF;
+ MEM_WB(0x0410, i);
+ /* XXX Perhaps setup more of the BDA here. See also int42(0x00). */
+}
+
+int setup_system_bios(void *base_addr)
+{
+ char *base = (char *) base_addr;
+
+ /*
+ * we trap the "industry standard entry points" to the BIOS
+ * and all other locations by filling them with "hlt"
+ * TODO: implement hlt-handler for these
+ */
+ memset(base, 0xf4, 0x10000);
+
+ /* set bios date */
+ //strcpy(base + 0x0FFF5, "06/11/99");
+ /* set up eisa ident string */
+ //strcpy(base + 0x0FFD9, "PCI_ISA");
+ /* write system model id for IBM-AT */
+ //*((unsigned char *) (base + 0x0FFFE)) = 0xfc;
+
+ return 1;
+}
+
+void reset_int_vect(void)
+{
+ /*
+ * This table is normally located at 0xF000:0xF0A4. However, int 0x42,
+ * function 0 (Mode Set) expects it (or a copy) somewhere in the bottom
+ * 64kB. Note that because this data doesn't survive POST, int 0x42 should
+ * only be used during EGA/VGA BIOS initialisation.
+ */
+ static const u8 VideoParms[] = {
+ /* Timing for modes 0x00 & 0x01 */
+ 0x38, 0x28, 0x2d, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
+ 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for modes 0x02 & 0x03 */
+ 0x71, 0x50, 0x5a, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
+ 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for modes 0x04, 0x05 & 0x06 */
+ 0x38, 0x28, 0x2d, 0x0a, 0x7f, 0x06, 0x64, 0x70,
+ 0x02, 0x01, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for mode 0x07 */
+ 0x61, 0x50, 0x52, 0x0f, 0x19, 0x06, 0x19, 0x19,
+ 0x02, 0x0d, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
+ /* Display page lengths in little endian order */
+ 0x00, 0x08, /* Modes 0x00 and 0x01 */
+ 0x00, 0x10, /* Modes 0x02 and 0x03 */
+ 0x00, 0x40, /* Modes 0x04 and 0x05 */
+ 0x00, 0x40, /* Modes 0x06 and 0x07 */
+ /* Number of columns for each mode */
+ 40, 40, 80, 80, 40, 40, 80, 80,
+ /* CGA Mode register value for each mode */
+ 0x2c, 0x28, 0x2d, 0x29, 0x2a, 0x2e, 0x1e, 0x29,
+ /* Padding */
+ 0x00, 0x00, 0x00, 0x00
+ };
+ int i;
+
+ for (i = 0; i < sizeof(VideoParms); i++)
+ MEM_WB(i + (0x1000 - sizeof(VideoParms)), VideoParms[i]);
+ MEM_WW(0x1d << 2, 0x1000 - sizeof(VideoParms));
+ MEM_WW((0x1d << 2) + 2, 0);
+
+ printk_debug("SETUP INT\n");
+ MEM_WW(0x10 << 2, 0xf065);
+ MEM_WW((0x10 << 2) + 2, SYS_BIOS >> 4);
+ MEM_WW(0x42 << 2, 0xf065);
+ MEM_WW((0x42 << 2) + 2, SYS_BIOS >> 4);
+ MEM_WW(0x6D << 2, 0xf065);
+ MEM_WW((0x6D << 2) + 2, SYS_BIOS >> 4);
+}
+
+void run_bios(struct device * dev, unsigned long addr)
+{
+#if 1
+ int i;
+ unsigned short initialcs = (addr & 0xF0000) >> 4;
+ unsigned short initialip = (addr + 3) & 0xFFFF;
+ unsigned short devfn = dev->bus->secondary << 8 | dev->path.u.pci.devfn;
+ X86EMU_intrFuncs intFuncs[256];
+
+ X86EMU_setMemBase(0, 0x100000);
+ X86EMU_setupPioFuncs(&myfuncs);
+ for (i = 0; i < 256; i++)
+ intFuncs[i] = do_int;
+ X86EMU_setupIntrFuncs(intFuncs);
+
+ {
+ char *date = "01/01/99";
+ for (i = 0; date[i]; i++)
+ wrb(0xffff5 + i, date[i]);
+ wrb(0xffff7, '/');
+ wrb(0xffffa, '/');
+ }
+
+ {
+ /* FixME: move PIT init to its own file */
+ outb(0x36, 0x43);
+ outb(0x00, 0x40);
+ outb(0x00, 0x40);
+ }
+ //setup_int_vect();
+
+ /* cpu setup */
+ X86_AX = devfn ? devfn : 0xff;
+ X86_DX = 0x80;
+ X86_EIP = initialip;
+ X86_CS = initialcs;
+
+ /* Initialize stack and data segment */
+ X86_SS = initialcs;
+ X86_SP = 0xfffe;
+ X86_DS = 0x0040;
+ X86_ES = 0x0000;
+
+ /* We need a sane way to return from bios
+ * execution. A hlt instruction and a pointer
+ * to it, both kept on the stack, will do.
+ */
+ pushw(0xf4f4); /* hlt; hlt */
+ pushw(X86_SS);
+ pushw(X86_SP + 2);
+
+ //X86EMU_trace_on();
+
+ X86EMU_exec();
+#endif
+}
diff --git a/src/devices/emulator/pcbios/Config.lb b/src/devices/emulator/pcbios/Config.lb
new file mode 100644
index 0000000000..231b6629b5
--- /dev/null
+++ b/src/devices/emulator/pcbios/Config.lb
@@ -0,0 +1 @@
+object pcibios.o \ No newline at end of file
diff --git a/src/devices/emulator/pcbios/pcibios.c b/src/devices/emulator/pcbios/pcibios.c
new file mode 100644
index 0000000000..74d25dc627
--- /dev/null
+++ b/src/devices/emulator/pcbios/pcibios.c
@@ -0,0 +1,142 @@
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <x86emu/x86emu.h>
+
+#include "pcibios.h"
+
+int pcibios_handler()
+{
+ int i, ret = 0;
+ struct device *dev = 0;
+
+ printk_debug("%s AX = %x\n", __func__, X86_AX);
+
+ switch (X86_AX) {
+ case PCI_BIOS_PRESENT:
+ X86_AH = 0x00; /* no config space/special cycle support */
+ X86_AL = 0x01; /* config mechanism 1 */
+ X86_EDX = 'P' | 'C' << 8 | 'I' | ' ' << 24;
+ X86_EBX = 0x0210; /* Version 2.10 */
+ X86_ECX = 0xFF00; /* FixME: Max bus number */
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ break;
+ case FIND_PCI_DEVICE:
+ /* FixME: support SI != 0 */
+ dev = dev_find_device(X86_DX, X86_CX, dev);
+ if (dev != 0) {
+ X86_BH = dev->bus->secondary;
+ X86_BL = dev->path.u.pci.devfn;
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case FIND_PCI_CLASS_CODE:
+ /* FixME: support SI != 0 */
+ dev = dev_find_class(X86_ECX, dev);
+ if (dev != 0) {
+ X86_BH = dev->bus->secondary;
+ X86_BL = dev->path.u.pci.devfn;
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_BYTE:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_CL = pci_read_config8(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_WORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_CX = pci_read_config16(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case READ_CONFIG_DWORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ X86_ECX = pci_read_config32(dev, X86_DI);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_BYTE:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config8(dev, X86_DI, X86_CL);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_WORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config16(dev, X86_DI, X86_CX);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ case WRITE_CONFIG_DWORD:
+ dev = dev_find_slot(X86_BH, X86_BL);
+ if (dev != 0) {
+ pci_write_config16(dev, X86_DI, X86_ECX);
+ X86_AH = SUCCESSFUL;
+ X86_EFLAGS &= ~FB_CF; /* clear carry flag */
+ ret = 1;
+ } else {
+ X86_AH = DEVICE_NOT_FOUND;
+ X86_EFLAGS |= FB_CF; /* set carry flag */
+ ret = 0;
+ }
+ break;
+ default:
+ X86_AH = FUNC_NOT_SUPPORTED;
+ X86_EFLAGS |= FB_CF;
+ break;
+ }
+
+ return ret;
+}
diff --git a/src/devices/emulator/pcbios/pcibios.h b/src/devices/emulator/pcbios/pcibios.h
new file mode 100644
index 0000000000..d99bee695e
--- /dev/null
+++ b/src/devices/emulator/pcbios/pcibios.h
@@ -0,0 +1,24 @@
+enum {
+ PCI_BIOS_PRESENT = 0xB101,
+ FIND_PCI_DEVICE = 0xB102,
+ FIND_PCI_CLASS_CODE = 0xB103,
+ GENERATE_SPECIAL_CYCLE = 0xB106,
+ READ_CONFIG_BYTE = 0xB108,
+ READ_CONFIG_WORD = 0xB109,
+ READ_CONFIG_DWORD = 0xB10A,
+ WRITE_CONFIG_BYTE = 0xB10B,
+ WRITE_CONFIG_WORD = 0xB10C,
+ WRITE_CONFIG_DWORD = 0xB10D,
+ GET_IRQ_ROUTING_OPTIONS = 0xB10E,
+ SET_PCI_IRQ = 0xB10F
+};
+
+enum {
+ SUCCESSFUL = 0x00,
+ FUNC_NOT_SUPPORTED = 0x81,
+ BAD_VENDOR_ID = 0x83,
+ DEVICE_NOT_FOUND = 0x86,
+ BAD_REGISTER_NUMBER = 0x87,
+ SET_FAILED = 0x88,
+ BUFFER_TOO_SMALL = 0x89
+};
diff --git a/src/devices/emulator/x86emu/Config.lb b/src/devices/emulator/x86emu/Config.lb
new file mode 100644
index 0000000000..20e8072204
--- /dev/null
+++ b/src/devices/emulator/x86emu/Config.lb
@@ -0,0 +1,7 @@
+object debug.o
+object decode.o
+object fpu.o
+object ops.o
+object ops2.o
+object prim_ops.o
+object sys.o
diff --git a/src/devices/emulator/x86emu/LICENSE b/src/devices/emulator/x86emu/LICENSE
new file mode 100644
index 0000000000..a3ede4a87d
--- /dev/null
+++ b/src/devices/emulator/x86emu/LICENSE
@@ -0,0 +1,17 @@
+ License information
+ -------------------
+
+The x86emu library is under a BSD style license, comaptible
+with the XFree86 and X licenses used by XFree86. The
+original x86emu libraries were under the GNU General Public
+License. Due to license incompatibilities between the GPL
+and the XFree86 license, the original authors of the code
+decided to allow a license change. If you have submitted
+code to the original x86emu project, and you don't agree
+with the license change, please contact us and let you
+know. Your code will be removed to comply with your wishes.
+
+If you have any questions about this, please send email to
+x86emu@linuxlabs.com or KendallB@scitechsoft.com for
+clarification.
+
diff --git a/src/devices/emulator/x86emu/debug.c b/src/devices/emulator/x86emu/debug.c
new file mode 100644
index 0000000000..dd47e3d3a5
--- /dev/null
+++ b/src/devices/emulator/x86emu/debug.c
@@ -0,0 +1,425 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file contains the code to handle debugging of the
+* emulator.
+*
+****************************************************************************/
+
+#include "x86emui.h"
+#include <stdarg.h>
+
+/*----------------------------- Implementation ----------------------------*/
+
+#ifdef DEBUG
+
+static void print_encoded_bytes (u16 s, u16 o);
+static void print_decoded_instruction (void);
+static int parse_line (char *s, int *ps, int *n);
+
+/* should look something like debug's output. */
+void X86EMU_trace_regs (void)
+{
+ if (DEBUG_TRACE()) {
+ x86emu_dump_regs();
+ }
+ if (DEBUG_DECODE() && ! DEBUG_DECODE_NOPRINT()) {
+ printk("%04x:%04x ",M.x86.saved_cs, M.x86.saved_ip);
+ print_encoded_bytes( M.x86.saved_cs, M.x86.saved_ip);
+ print_decoded_instruction();
+ }
+}
+
+void X86EMU_trace_xregs (void)
+{
+ if (DEBUG_TRACE()) {
+ x86emu_dump_xregs();
+ }
+}
+
+void x86emu_just_disassemble (void)
+{
+ /*
+ * This routine called if the flag DEBUG_DISASSEMBLE is set kind
+ * of a hack!
+ */
+ printk("%04x:%04x ",M.x86.saved_cs, M.x86.saved_ip);
+ print_encoded_bytes( M.x86.saved_cs, M.x86.saved_ip);
+ print_decoded_instruction();
+}
+
+static void disassemble_forward (u16 seg, u16 off, int n)
+{
+ X86EMU_sysEnv tregs;
+ int i;
+ u8 op1;
+ /*
+ * hack, hack, hack. What we do is use the exact machinery set up
+ * for execution, except that now there is an additional state
+ * flag associated with the "execution", and we are using a copy
+ * of the register struct. All the major opcodes, once fully
+ * decoded, have the following two steps: TRACE_REGS(r,m);
+ * SINGLE_STEP(r,m); which disappear if DEBUG is not defined to
+ * the preprocessor. The TRACE_REGS macro expands to:
+ *
+ * if (debug&DEBUG_DISASSEMBLE)
+ * {just_disassemble(); goto EndOfInstruction;}
+ * if (debug&DEBUG_TRACE) trace_regs(r,m);
+ *
+ * ...... and at the last line of the routine.
+ *
+ * EndOfInstruction: end_instr();
+ *
+ * Up to the point where TRACE_REG is expanded, NO modifications
+ * are done to any register EXCEPT the IP register, for fetch and
+ * decoding purposes.
+ *
+ * This was done for an entirely different reason, but makes a
+ * nice way to get the system to help debug codes.
+ */
+ tregs = M;
+ tregs.x86.R_IP = off;
+ tregs.x86.R_CS = seg;
+
+ /* reset the decoding buffers */
+ tregs.x86.enc_str_pos = 0;
+ tregs.x86.enc_pos = 0;
+
+ /* turn on the "disassemble only, no execute" flag */
+ tregs.x86.debug |= DEBUG_DISASSEMBLE_F;
+
+ /* DUMP NEXT n instructions to screen in straight_line fashion */
+ /*
+ * This looks like the regular instruction fetch stream, except
+ * that when this occurs, each fetched opcode, upon seeing the
+ * DEBUG_DISASSEMBLE flag set, exits immediately after decoding
+ * the instruction. XXX --- CHECK THAT MEM IS NOT AFFECTED!!!
+ * Note the use of a copy of the register structure...
+ */
+ for (i=0; i<n; i++) {
+ op1 = (*sys_rdb)(((u32)M.x86.R_CS<<4) + (M.x86.R_IP++));
+ (x86emu_optab[op1])(op1);
+ }
+ /* end major hack mode. */
+}
+
+void x86emu_check_ip_access (void)
+{
+ /* NULL as of now */
+}
+
+void x86emu_check_sp_access (void)
+{
+}
+
+void x86emu_check_mem_access (u32 dummy)
+{
+ /* check bounds, etc */
+}
+
+void x86emu_check_data_access (uint dummy1, uint dummy2)
+{
+ /* check bounds, etc */
+}
+
+void x86emu_inc_decoded_inst_len (int x)
+{
+ M.x86.enc_pos += x;
+}
+
+void x86emu_decode_printf (char *x)
+{
+ sprintf(M.x86.decoded_buf+M.x86.enc_str_pos,"%s",x);
+ M.x86.enc_str_pos += strlen(x);
+}
+
+void x86emu_decode_printf2 (char *x, int y)
+{
+ char temp[100];
+ sprintf(temp,x,y);
+ sprintf(M.x86.decoded_buf+M.x86.enc_str_pos,"%s",temp);
+ M.x86.enc_str_pos += strlen(temp);
+}
+
+void x86emu_end_instr (void)
+{
+ M.x86.enc_str_pos = 0;
+ M.x86.enc_pos = 0;
+}
+
+static void print_encoded_bytes (u16 s, u16 o)
+{
+ int i;
+ char buf1[64];
+ for (i=0; i< M.x86.enc_pos; i++) {
+ sprintf(buf1+2*i,"%02x", fetch_data_byte_abs(s,o+i));
+ }
+ printk("%-20s",buf1);
+}
+
+static void print_decoded_instruction (void)
+{
+ printk("%s", M.x86.decoded_buf);
+}
+
+void x86emu_print_int_vect (u16 iv)
+{
+ u16 seg,off;
+
+ if (iv > 256) return;
+ seg = fetch_data_word_abs(0,iv*4);
+ off = fetch_data_word_abs(0,iv*4+2);
+ printk("%04x:%04x ", seg, off);
+}
+
+void X86EMU_dump_memory (u16 seg, u16 off, u32 amt)
+{
+ u32 start = off & 0xfffffff0;
+ u32 end = (off+16) & 0xfffffff0;
+ u32 i;
+ u32 current;
+
+ current = start;
+ while (end <= off + amt) {
+ printk("%04x:%04x ", seg, start);
+ for (i=start; i< off; i++)
+ printk(" ");
+ for ( ; i< end; i++)
+ printk("%02x ", fetch_data_byte_abs(seg,i));
+ printk("\n");
+ start = end;
+ end = start + 16;
+ }
+}
+
+void x86emu_single_step (void)
+{
+ char s[1024];
+ int ps[10];
+ int ntok;
+ int cmd;
+ int done;
+ int segment;
+ int offset;
+ static int breakpoint;
+ static int noDecode = 1;
+
+ char *p;
+
+ if (DEBUG_BREAK()) {
+ if (M.x86.saved_ip != breakpoint) {
+ return;
+ } else {
+ M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+ M.x86.debug |= DEBUG_TRACE_F;
+ M.x86.debug &= ~DEBUG_BREAK_F;
+ print_decoded_instruction ();
+ X86EMU_trace_regs();
+ }
+ }
+ done=0;
+ offset = M.x86.saved_ip;
+ while (!done) {
+ printk("-");
+ p = fgets(s, 1023, stdin);
+ cmd = parse_line(s, ps, &ntok);
+ switch(cmd) {
+ case 'u':
+ disassemble_forward(M.x86.saved_cs,(u16)offset,10);
+ break;
+ case 'd':
+ if (ntok == 2) {
+ segment = M.x86.saved_cs;
+ offset = ps[1];
+ X86EMU_dump_memory(segment,(u16)offset,16);
+ offset += 16;
+ } else if (ntok == 3) {
+ segment = ps[1];
+ offset = ps[2];
+ X86EMU_dump_memory(segment,(u16)offset,16);
+ offset += 16;
+ } else {
+ segment = M.x86.saved_cs;
+ X86EMU_dump_memory(segment,(u16)offset,16);
+ offset += 16;
+ }
+ break;
+ case 'c':
+ M.x86.debug ^= DEBUG_TRACECALL_F;
+ break;
+ case 's':
+ M.x86.debug ^= DEBUG_SVC_F | DEBUG_SYS_F | DEBUG_SYSINT_F;
+ break;
+ case 'r':
+ X86EMU_trace_regs();
+ break;
+ case 'x':
+ X86EMU_trace_xregs();
+ break;
+ case 'g':
+ if (ntok == 2) {
+ breakpoint = ps[1];
+ if (noDecode) {
+ M.x86.debug |= DEBUG_DECODE_NOPRINT_F;
+ } else {
+ M.x86.debug &= ~DEBUG_DECODE_NOPRINT_F;
+ }
+ M.x86.debug &= ~DEBUG_TRACE_F;
+ M.x86.debug |= DEBUG_BREAK_F;
+ done = 1;
+ }
+ break;
+ case 'q':
+ M.x86.debug |= DEBUG_EXIT;
+ return;
+ case 'P':
+ noDecode = (noDecode)?0:1;
+ printk("Toggled decoding to %s\n",(noDecode)?"FALSE":"TRUE");
+ break;
+ case 't':
+ case 0:
+ done = 1;
+ break;
+ }
+ }
+}
+
+int X86EMU_trace_on(void)
+{
+ return M.x86.debug |= DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F;
+}
+
+int X86EMU_trace_off(void)
+{
+ return M.x86.debug &= ~(DEBUG_STEP_F | DEBUG_DECODE_F | DEBUG_TRACE_F);
+}
+
+static int parse_line (char *s, int *ps, int *n)
+{
+ int cmd;
+
+ *n = 0;
+ while(*s == ' ' || *s == '\t') s++;
+ ps[*n] = *s;
+ switch (*s) {
+ case '\n':
+ *n += 1;
+ return 0;
+ default:
+ cmd = *s;
+ *n += 1;
+ }
+
+ while (1) {
+ while (*s != ' ' && *s != '\t' && *s != '\n') s++;
+
+ if (*s == '\n')
+ return cmd;
+
+ while(*s == ' ' || *s == '\t') s++;
+
+ sscanf(s,"%x",&ps[*n]);
+ *n += 1;
+ }
+}
+
+#endif /* DEBUG */
+
+void x86emu_dump_regs (void)
+{
+ printk("\tAX=%04x ", M.x86.R_AX );
+ printk("BX=%04x ", M.x86.R_BX );
+ printk("CX=%04x ", M.x86.R_CX );
+ printk("DX=%04x ", M.x86.R_DX );
+ printk("SP=%04x ", M.x86.R_SP );
+ printk("BP=%04x ", M.x86.R_BP );
+ printk("SI=%04x ", M.x86.R_SI );
+ printk("DI=%04x\n", M.x86.R_DI );
+ printk("\tDS=%04x ", M.x86.R_DS );
+ printk("ES=%04x ", M.x86.R_ES );
+ printk("SS=%04x ", M.x86.R_SS );
+ printk("CS=%04x ", M.x86.R_CS );
+ printk("IP=%04x ", M.x86.R_IP );
+ if (ACCESS_FLAG(F_OF)) printk("OV "); /* CHECKED... */
+ else printk("NV ");
+ if (ACCESS_FLAG(F_DF)) printk("DN ");
+ else printk("UP ");
+ if (ACCESS_FLAG(F_IF)) printk("EI ");
+ else printk("DI ");
+ if (ACCESS_FLAG(F_SF)) printk("NG ");
+ else printk("PL ");
+ if (ACCESS_FLAG(F_ZF)) printk("ZR ");
+ else printk("NZ ");
+ if (ACCESS_FLAG(F_AF)) printk("AC ");
+ else printk("NA ");
+ if (ACCESS_FLAG(F_PF)) printk("PE ");
+ else printk("PO ");
+ if (ACCESS_FLAG(F_CF)) printk("CY ");
+ else printk("NC ");
+ printk("\n");
+}
+
+void x86emu_dump_xregs (void)
+{
+ printk("\tEAX=%08x ", M.x86.R_EAX );
+ printk("EBX=%08x ", M.x86.R_EBX );
+ printk("ECX=%08x ", M.x86.R_ECX );
+ printk("EDX=%08x \n", M.x86.R_EDX );
+ printk("\tESP=%08x ", M.x86.R_ESP );
+ printk("EBP=%08x ", M.x86.R_EBP );
+ printk("ESI=%08x ", M.x86.R_ESI );
+ printk("EDI=%08x\n", M.x86.R_EDI );
+ printk("\tDS=%04x ", M.x86.R_DS );
+ printk("ES=%04x ", M.x86.R_ES );
+ printk("SS=%04x ", M.x86.R_SS );
+ printk("CS=%04x ", M.x86.R_CS );
+ printk("EIP=%08x\n\t", M.x86.R_EIP );
+ if (ACCESS_FLAG(F_OF)) printk("OV "); /* CHECKED... */
+ else printk("NV ");
+ if (ACCESS_FLAG(F_DF)) printk("DN ");
+ else printk("UP ");
+ if (ACCESS_FLAG(F_IF)) printk("EI ");
+ else printk("DI ");
+ if (ACCESS_FLAG(F_SF)) printk("NG ");
+ else printk("PL ");
+ if (ACCESS_FLAG(F_ZF)) printk("ZR ");
+ else printk("NZ ");
+ if (ACCESS_FLAG(F_AF)) printk("AC ");
+ else printk("NA ");
+ if (ACCESS_FLAG(F_PF)) printk("PE ");
+ else printk("PO ");
+ if (ACCESS_FLAG(F_CF)) printk("CY ");
+ else printk("NC ");
+ printk("\n");
+}
diff --git a/src/devices/emulator/x86emu/debug.h b/src/devices/emulator/x86emu/debug.h
new file mode 100644
index 0000000000..d786a3d17f
--- /dev/null
+++ b/src/devices/emulator/x86emu/debug.h
@@ -0,0 +1,213 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for debug definitions.
+*
+****************************************************************************/
+/* $XFree86: xc/extras/x86emu/src/x86emu/x86emu/debug.h,v 1.4 2000/11/21 23:10:27 tsi Exp $ */
+
+#ifndef __X86EMU_DEBUG_H
+#define __X86EMU_DEBUG_H
+
+//#define DEBUG 0
+#undef DEBUG
+/*---------------------- Macros and type definitions ----------------------*/
+
+/* checks to be enabled for "runtime" */
+
+#define CHECK_IP_FETCH_F 0x1
+#define CHECK_SP_ACCESS_F 0x2
+#define CHECK_MEM_ACCESS_F 0x4 /*using regular linear pointer */
+#define CHECK_DATA_ACCESS_F 0x8 /*using segment:offset*/
+
+#ifdef DEBUG
+# define CHECK_IP_FETCH() (M.x86.check & CHECK_IP_FETCH_F)
+# define CHECK_SP_ACCESS() (M.x86.check & CHECK_SP_ACCESS_F)
+# define CHECK_MEM_ACCESS() (M.x86.check & CHECK_MEM_ACCESS_F)
+# define CHECK_DATA_ACCESS() (M.x86.check & CHECK_DATA_ACCESS_F)
+#else
+# define CHECK_IP_FETCH()
+# define CHECK_SP_ACCESS()
+# define CHECK_MEM_ACCESS()
+# define CHECK_DATA_ACCESS()
+#endif
+
+#ifdef DEBUG
+# define DEBUG_INSTRUMENT() (M.x86.debug & DEBUG_INSTRUMENT_F)
+# define DEBUG_DECODE() (M.x86.debug & DEBUG_DECODE_F)
+# define DEBUG_TRACE() (M.x86.debug & DEBUG_TRACE_F)
+# define DEBUG_STEP() (M.x86.debug & DEBUG_STEP_F)
+# define DEBUG_DISASSEMBLE() (M.x86.debug & DEBUG_DISASSEMBLE_F)
+# define DEBUG_BREAK() (M.x86.debug & DEBUG_BREAK_F)
+# define DEBUG_SVC() (M.x86.debug & DEBUG_SVC_F)
+# define DEBUG_SAVE_IP_CS() (M.x86.debug & DEBUG_SAVE_IP_CS_F)
+
+# define DEBUG_FS() (M.x86.debug & DEBUG_FS_F)
+# define DEBUG_PROC() (M.x86.debug & DEBUG_PROC_F)
+# define DEBUG_SYSINT() (M.x86.debug & DEBUG_SYSINT_F)
+# define DEBUG_TRACECALL() (M.x86.debug & DEBUG_TRACECALL_F)
+# define DEBUG_TRACECALLREGS() (M.x86.debug & DEBUG_TRACECALL_REGS_F)
+# define DEBUG_SYS() (M.x86.debug & DEBUG_SYS_F)
+# define DEBUG_MEM_TRACE() (M.x86.debug & DEBUG_MEM_TRACE_F)
+# define DEBUG_IO_TRACE() (M.x86.debug & DEBUG_IO_TRACE_F)
+# define DEBUG_DECODE_NOPRINT() (M.x86.debug & DEBUG_DECODE_NOPRINT_F)
+#else
+# define DEBUG_INSTRUMENT() 0
+# define DEBUG_DECODE() 0
+# define DEBUG_TRACE() 0
+# define DEBUG_STEP() 0
+# define DEBUG_DISASSEMBLE() 0
+# define DEBUG_BREAK() 0
+# define DEBUG_SVC() 0
+# define DEBUG_SAVE_IP_CS() 0
+# define DEBUG_FS() 0
+# define DEBUG_PROC() 0
+# define DEBUG_SYSINT() 0
+# define DEBUG_TRACECALL() 0
+# define DEBUG_TRACECALLREGS() 0
+# define DEBUG_SYS() 0
+# define DEBUG_MEM_TRACE() 0
+# define DEBUG_IO_TRACE() 0
+# define DEBUG_DECODE_NOPRINT() 0
+#endif
+
+#ifdef DEBUG
+
+# define DECODE_PRINTF(x) if (DEBUG_DECODE()) \
+ x86emu_decode_printf(x)
+# define DECODE_PRINTF2(x,y) if (DEBUG_DECODE()) \
+ x86emu_decode_printf2(x,y)
+
+/*
+ * The following allow us to look at the bytes of an instruction. The
+ * first INCR_INSTRN_LEN, is called everytime bytes are consumed in
+ * the decoding process. The SAVE_IP_CS is called initially when the
+ * major opcode of the instruction is accessed.
+ */
+#define INC_DECODED_INST_LEN(x) \
+ if (DEBUG_DECODE()) \
+ x86emu_inc_decoded_inst_len(x)
+
+#define SAVE_IP_CS(x,y) \
+ if (DEBUG_DECODE() | DEBUG_TRACECALL() | DEBUG_BREAK() \
+ | DEBUG_IO_TRACE() | DEBUG_SAVE_IP_CS()) { \
+ M.x86.saved_cs = x; \
+ M.x86.saved_ip = y; \
+ }
+#else
+# define INC_DECODED_INST_LEN(x)
+# define DECODE_PRINTF(x)
+# define DECODE_PRINTF2(x,y)
+# define SAVE_IP_CS(x,y)
+#endif
+
+#ifdef DEBUG
+#define TRACE_REGS() \
+ if (DEBUG_DISASSEMBLE()) { \
+ x86emu_just_disassemble(); \
+ goto EndOfTheInstructionProcedure; \
+ } \
+ if (DEBUG_TRACE() || DEBUG_DECODE()) X86EMU_trace_regs()
+#else
+# define TRACE_REGS()
+#endif
+
+#ifdef DEBUG
+# define SINGLE_STEP() if (DEBUG_STEP()) x86emu_single_step()
+#else
+# define SINGLE_STEP()
+#endif
+
+#define TRACE_AND_STEP() \
+ TRACE_REGS(); \
+ SINGLE_STEP()
+
+#ifdef DEBUG
+# define START_OF_INSTR()
+# define END_OF_INSTR() EndOfTheInstructionProcedure: x86emu_end_instr();
+# define END_OF_INSTR_NO_TRACE() x86emu_end_instr();
+#else
+# define START_OF_INSTR()
+# define END_OF_INSTR()
+# define END_OF_INSTR_NO_TRACE()
+#endif
+
+#ifdef DEBUG
+# define CALL_TRACE(u,v,w,x,s) \
+ if (DEBUG_TRACECALLREGS()) \
+ x86emu_dump_regs(); \
+ if (DEBUG_TRACECALL()) \
+ printk("%04x:%04x: CALL %s%04x:%04x\n", u , v, s, w, x);
+# define RETURN_TRACE(n,u,v) \
+ if (DEBUG_TRACECALLREGS()) \
+ x86emu_dump_regs(); \
+ if (DEBUG_TRACECALL()) \
+ printk("%04x:%04x: %s\n",u,v,n);
+#else
+# define CALL_TRACE(u,v,w,x,s)
+# define RETURN_TRACE(n,u,v)
+#endif
+
+#ifdef DEBUG
+#define DB(x) x
+#else
+#define DB(x)
+#endif
+
+/*-------------------------- Function Prototypes --------------------------*/
+
+#ifdef __cplusplus
+extern "C" { /* Use "C" linkage when in C++ mode */
+#endif
+
+extern void x86emu_inc_decoded_inst_len (int x);
+extern void x86emu_decode_printf (char *x);
+extern void x86emu_decode_printf2 (char *x, int y);
+extern void x86emu_just_disassemble (void);
+extern void x86emu_single_step (void);
+extern void x86emu_end_instr (void);
+extern void x86emu_dump_regs (void);
+extern void x86emu_dump_xregs (void);
+extern void x86emu_print_int_vect (u16 iv);
+extern void x86emu_instrument_instruction (void);
+extern void x86emu_check_ip_access (void);
+extern void x86emu_check_sp_access (void);
+extern void x86emu_check_mem_access (u32 p);
+extern void x86emu_check_data_access (uint s, uint o);
+
+#ifdef __cplusplus
+} /* End of "C" linkage for C++ */
+#endif
+
+#endif /* __X86EMU_DEBUG_H */
diff --git a/src/devices/emulator/x86emu/decode.c b/src/devices/emulator/x86emu/decode.c
new file mode 100644
index 0000000000..1badb2db7c
--- /dev/null
+++ b/src/devices/emulator/x86emu/decode.c
@@ -0,0 +1,1147 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file includes subroutines which are related to
+* instruction decoding and accessess of immediate data via IP. etc.
+*
+****************************************************************************/
+
+#include "x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+REMARKS:
+Handles any pending asychronous interrupts.
+****************************************************************************/
+static void x86emu_intr_handle(void)
+{
+ u8 intno;
+
+ if (M.x86.intr & INTR_SYNCH) {
+ intno = M.x86.intno;
+ if (_X86EMU_intrTab[intno]) {
+ (*_X86EMU_intrTab[intno])(intno);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(intno * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(intno * 4);
+ M.x86.intr = 0;
+ }
+ }
+}
+
+/****************************************************************************
+PARAMETERS:
+intrnum - Interrupt number to raise
+
+REMARKS:
+Raise the specified interrupt to be handled before the execution of the
+next instruction.
+****************************************************************************/
+void x86emu_intr_raise(
+ u8 intrnum)
+{
+ M.x86.intno = intrnum;
+ M.x86.intr |= INTR_SYNCH;
+}
+
+/****************************************************************************
+REMARKS:
+Main execution loop for the emulator. We return from here when the system
+halts, which is normally caused by a stack fault when we return from the
+original real mode call.
+****************************************************************************/
+void X86EMU_exec(void)
+{
+ u8 op1;
+
+ M.x86.intr = 0;
+ DB(x86emu_end_instr();)
+
+ for (;;) {
+DB( if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ /* If debugging, save the IP and CS values. */
+ SAVE_IP_CS(M.x86.R_CS, M.x86.R_IP);
+ INC_DECODED_INST_LEN(1);
+ if (M.x86.intr) {
+ if (M.x86.intr & INTR_HALTED) {
+DB( if (M.x86.R_SP != 0) {
+ printk("halted\n");
+ X86EMU_trace_regs();
+ }
+ else {
+ if (M.x86.debug)
+ printk("Service completed successfully\n");
+ })
+ return;
+ }
+ if (((M.x86.intr & INTR_SYNCH) && (M.x86.intno == 0 || M.x86.intno == 2)) ||
+ !ACCESS_FLAG(F_IF)) {
+ x86emu_intr_handle();
+ }
+ }
+ op1 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+ (*x86emu_optab[op1])(op1);
+ //if (M.x86.debug & DEBUG_EXIT) {
+ // M.x86.debug &= ~DEBUG_EXIT;
+ // return;
+ //}
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Halts the system by setting the halted system flag.
+****************************************************************************/
+void X86EMU_halt_sys(void)
+{
+ M.x86.intr |= INTR_HALTED;
+}
+
+/****************************************************************************
+PARAMETERS:
+mod - Mod value from decoded byte
+regh - Reg h value from decoded byte
+regl - Reg l value from decoded byte
+
+REMARKS:
+Raise the specified interrupt to be handled before the execution of the
+next instruction.
+
+NOTE: Do not inline this function, as (*sys_rdb) is already inline!
+****************************************************************************/
+void fetch_decode_modrm(
+ int *mod,
+ int *regh,
+ int *regl)
+{
+ int fetched;
+
+DB( if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ *mod = (fetched >> 6) & 0x03;
+ *regh = (fetched >> 3) & 0x07;
+ *regl = (fetched >> 0) & 0x07;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate byte value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdb) is already inline!
+****************************************************************************/
+u8 fetch_byte_imm(void)
+{
+ u8 fetched;
+
+DB( if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate word value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdw) is already inline!
+****************************************************************************/
+u16 fetch_word_imm(void)
+{
+ u16 fetched;
+
+DB( if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdw)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
+ M.x86.R_IP += 2;
+ INC_DECODED_INST_LEN(2);
+ return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Immediate lone value read from instruction queue
+
+REMARKS:
+This function returns the immediate byte from the instruction queue, and
+moves the instruction pointer to the next value.
+
+NOTE: Do not inline this function, as (*sys_rdw) is already inline!
+****************************************************************************/
+u32 fetch_long_imm(void)
+{
+ u32 fetched;
+
+DB( if (CHECK_IP_FETCH())
+ x86emu_check_ip_access();)
+ fetched = (*sys_rdl)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP));
+ M.x86.R_IP += 4;
+ INC_DECODED_INST_LEN(4);
+ return fetched;
+}
+
+/****************************************************************************
+RETURNS:
+Value of the default data segment
+
+REMARKS:
+Inline function that returns the default data segment for the current
+instruction.
+
+On the x86 processor, the default segment is not always DS if there is
+no segment override. Address modes such as -3[BP] or 10[BP+SI] all refer to
+addresses relative to SS (ie: on the stack). So, at the minimum, all
+decodings of addressing modes would have to set/clear a bit describing
+whether the access is relative to DS or SS. That is the function of the
+cpu-state-varible M.x86.mode. There are several potential states:
+
+ repe prefix seen (handled elsewhere)
+ repne prefix seen (ditto)
+
+ cs segment override
+ ds segment override
+ es segment override
+ fs segment override
+ gs segment override
+ ss segment override
+
+ ds/ss select (in absense of override)
+
+Each of the above 7 items are handled with a bit in the mode field.
+****************************************************************************/
+_INLINE u32 get_data_segment(void)
+{
+#define GET_SEGMENT(segment)
+ switch (M.x86.mode & SYSMODE_SEGMASK) {
+ case 0: /* default case: use ds register */
+ case SYSMODE_SEGOVR_DS:
+ case SYSMODE_SEGOVR_DS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_DS;
+ case SYSMODE_SEG_DS_SS: /* non-overridden, use ss register */
+ return M.x86.R_SS;
+ case SYSMODE_SEGOVR_CS:
+ case SYSMODE_SEGOVR_CS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_CS;
+ case SYSMODE_SEGOVR_ES:
+ case SYSMODE_SEGOVR_ES | SYSMODE_SEG_DS_SS:
+ return M.x86.R_ES;
+ case SYSMODE_SEGOVR_FS:
+ case SYSMODE_SEGOVR_FS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_FS;
+ case SYSMODE_SEGOVR_GS:
+ case SYSMODE_SEGOVR_GS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_GS;
+ case SYSMODE_SEGOVR_SS:
+ case SYSMODE_SEGOVR_SS | SYSMODE_SEG_DS_SS:
+ return M.x86.R_SS;
+ default:
+#ifdef DEBUG
+ printk("error: should not happen: multiple overrides.\n");
+#endif
+ HALT_SYS();
+ return 0;
+ }
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to load data from
+
+RETURNS:
+Byte value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u8 fetch_data_byte(
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ return (*sys_rdb)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to load data from
+
+RETURNS:
+Word value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 fetch_data_word(
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ return (*sys_rdw)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to load data from
+
+RETURNS:
+Long value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 fetch_data_long(
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ return (*sys_rdl)((get_data_segment() << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset - Offset to load data from
+
+RETURNS:
+Byte value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u8 fetch_data_byte_abs(
+ uint segment,
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ return (*sys_rdb)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset - Offset to load data from
+
+RETURNS:
+Word value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 fetch_data_word_abs(
+ uint segment,
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ return (*sys_rdw)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to load data from
+offset - Offset to load data from
+
+RETURNS:
+Long value read from the absolute memory location.
+
+NOTE: Do not inline this function as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 fetch_data_long_abs(
+ uint segment,
+ uint offset)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ return (*sys_rdl)(((u32)segment << 4) + offset);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a word value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_byte(
+ uint offset,
+ u8 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ (*sys_wrb)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a word value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_word(
+ uint offset,
+ u16 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ (*sys_wrw)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a long value to an segmented memory location. The segment used is
+the current 'default' segment, which may have been overridden.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_long(
+ uint offset,
+ u32 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access((u16)get_data_segment(), offset);
+#endif
+ (*sys_wrl)((get_data_segment() << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a byte value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_byte_abs(
+ uint segment,
+ uint offset,
+ u8 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ (*sys_wrb)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a word value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_word_abs(
+ uint segment,
+ uint offset,
+ u16 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ (*sys_wrw)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+segment - Segment to store data at
+offset - Offset to store data at
+val - Value to store
+
+REMARKS:
+Writes a long value to an absolute memory location.
+
+NOTE: Do not inline this function as (*sys_wrX) is already inline!
+****************************************************************************/
+void store_data_long_abs(
+ uint segment,
+ uint offset,
+ u32 val)
+{
+#ifdef DEBUG
+ if (CHECK_DATA_ACCESS())
+ x86emu_check_data_access(segment, offset);
+#endif
+ (*sys_wrl)(((u32)segment << 4) + offset, val);
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for byte operands. Also enables the decoding of instructions.
+****************************************************************************/
+u8* decode_rm_byte_register(
+ int reg)
+{
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("AL");
+ return &M.x86.R_AL;
+ case 1:
+ DECODE_PRINTF("CL");
+ return &M.x86.R_CL;
+ case 2:
+ DECODE_PRINTF("DL");
+ return &M.x86.R_DL;
+ case 3:
+ DECODE_PRINTF("BL");
+ return &M.x86.R_BL;
+ case 4:
+ DECODE_PRINTF("AH");
+ return &M.x86.R_AH;
+ case 5:
+ DECODE_PRINTF("CH");
+ return &M.x86.R_CH;
+ case 6:
+ DECODE_PRINTF("DH");
+ return &M.x86.R_DH;
+ case 7:
+ DECODE_PRINTF("BH");
+ return &M.x86.R_BH;
+ }
+ HALT_SYS();
+ return NULL; /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for word operands. Also enables the decoding of instructions.
+****************************************************************************/
+u16* decode_rm_word_register(
+ int reg)
+{
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("AX");
+ return &M.x86.R_AX;
+ case 1:
+ DECODE_PRINTF("CX");
+ return &M.x86.R_CX;
+ case 2:
+ DECODE_PRINTF("DX");
+ return &M.x86.R_DX;
+ case 3:
+ DECODE_PRINTF("BX");
+ return &M.x86.R_BX;
+ case 4:
+ DECODE_PRINTF("SP");
+ return &M.x86.R_SP;
+ case 5:
+ DECODE_PRINTF("BP");
+ return &M.x86.R_BP;
+ case 6:
+ DECODE_PRINTF("SI");
+ return &M.x86.R_SI;
+ case 7:
+ DECODE_PRINTF("DI");
+ return &M.x86.R_DI;
+ }
+ HALT_SYS();
+ return NULL; /* NOTREACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for dword operands. Also enables the decoding of instructions.
+****************************************************************************/
+u32* decode_rm_long_register(
+ int reg)
+{
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("EAX");
+ return &M.x86.R_EAX;
+ case 1:
+ DECODE_PRINTF("ECX");
+ return &M.x86.R_ECX;
+ case 2:
+ DECODE_PRINTF("EDX");
+ return &M.x86.R_EDX;
+ case 3:
+ DECODE_PRINTF("EBX");
+ return &M.x86.R_EBX;
+ case 4:
+ DECODE_PRINTF("ESP");
+ return &M.x86.R_ESP;
+ case 5:
+ DECODE_PRINTF("EBP");
+ return &M.x86.R_EBP;
+ case 6:
+ DECODE_PRINTF("ESI");
+ return &M.x86.R_ESI;
+ case 7:
+ DECODE_PRINTF("EDI");
+ return &M.x86.R_EDI;
+ }
+ HALT_SYS();
+ return NULL; /* NOTREACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+reg - Register to decode
+
+RETURNS:
+Pointer to the appropriate register
+
+REMARKS:
+Return a pointer to the register given by the R/RM field of the
+modrm byte, for word operands, modified from above for the weirdo
+special case of segreg operands. Also enables the decoding of instructions.
+****************************************************************************/
+u16* decode_rm_seg_register(
+ int reg)
+{
+ switch (reg) {
+ case 0:
+ DECODE_PRINTF("ES");
+ return &M.x86.R_ES;
+ case 1:
+ DECODE_PRINTF("CS");
+ return &M.x86.R_CS;
+ case 2:
+ DECODE_PRINTF("SS");
+ return &M.x86.R_SS;
+ case 3:
+ DECODE_PRINTF("DS");
+ return &M.x86.R_DS;
+ case 4:
+ DECODE_PRINTF("FS");
+ return &M.x86.R_FS;
+ case 5:
+ DECODE_PRINTF("GS");
+ return &M.x86.R_GS;
+ case 6:
+ case 7:
+ DECODE_PRINTF("ILLEGAL SEGREG");
+ break;
+ }
+ HALT_SYS();
+ return NULL; /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+scale - scale value of SIB byte
+index - index value of SIB byte
+
+RETURNS:
+Value of scale * index
+
+REMARKS:
+Decodes scale/index of SIB byte and returns relevant offset part of
+effective address.
+****************************************************************************/
+unsigned decode_sib_si(
+ int scale,
+ int index)
+{
+ scale = 1 << scale;
+ if (scale > 1) {
+ DECODE_PRINTF2("[%d*", scale);
+ } else {
+ DECODE_PRINTF("[");
+ }
+ switch (index) {
+ case 0:
+ DECODE_PRINTF("EAX]");
+ return M.x86.R_EAX * index;
+ case 1:
+ DECODE_PRINTF("ECX]");
+ return M.x86.R_ECX * index;
+ case 2:
+ DECODE_PRINTF("EDX]");
+ return M.x86.R_EDX * index;
+ case 3:
+ DECODE_PRINTF("EBX]");
+ return M.x86.R_EBX * index;
+ case 4:
+ DECODE_PRINTF("0]");
+ return 0;
+ case 5:
+ DECODE_PRINTF("EBP]");
+ return M.x86.R_EBP * index;
+ case 6:
+ DECODE_PRINTF("ESI]");
+ return M.x86.R_ESI * index;
+ case 7:
+ DECODE_PRINTF("EDI]");
+ return M.x86.R_EDI * index;
+ }
+ HALT_SYS();
+ return 0; /* NOT REACHED OR REACHED ON ERROR */
+}
+
+/****************************************************************************
+PARAMETERS:
+mod - MOD value of preceding ModR/M byte
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Decodes SIB addressing byte and returns calculated effective address.
+****************************************************************************/
+unsigned decode_sib_address(
+ int mod)
+{
+ int sib = fetch_byte_imm();
+ int ss = (sib >> 6) & 0x03;
+ int index = (sib >> 3) & 0x07;
+ int base = sib & 0x07;
+ int offset = 0;
+ int displacement;
+
+ switch (base) {
+ case 0:
+ DECODE_PRINTF("[EAX]");
+ offset = M.x86.R_EAX;
+ break;
+ case 1:
+ DECODE_PRINTF("[ECX]");
+ offset = M.x86.R_ECX;
+ break;
+ case 2:
+ DECODE_PRINTF("[EDX]");
+ offset = M.x86.R_EDX;
+ break;
+ case 3:
+ DECODE_PRINTF("[EBX]");
+ offset = M.x86.R_EBX;
+ break;
+ case 4:
+ DECODE_PRINTF("[ESP]");
+ offset = M.x86.R_ESP;
+ break;
+ case 5:
+ switch (mod) {
+ case 0:
+ displacement = (s32)fetch_long_imm();
+ DECODE_PRINTF2("[%d]", displacement);
+ offset = displacement;
+ break;
+ case 1:
+ displacement = (s8)fetch_byte_imm();
+ DECODE_PRINTF2("[%d][EBP]", displacement);
+ offset = M.x86.R_EBP + displacement;
+ break;
+ case 2:
+ displacement = (s32)fetch_long_imm();
+ DECODE_PRINTF2("[%d][EBP]", displacement);
+ offset = M.x86.R_EBP + displacement;
+ break;
+ default:
+ HALT_SYS();
+ }
+ DECODE_PRINTF("[EAX]");
+ offset = M.x86.R_EAX;
+ break;
+ case 6:
+ DECODE_PRINTF("[ESI]");
+ offset = M.x86.R_ESI;
+ break;
+ case 7:
+ DECODE_PRINTF("[EDI]");
+ offset = M.x86.R_EDI;
+ break;
+ default:
+ HALT_SYS();
+ }
+ offset += decode_sib_si(ss, index);
+ return offset;
+}
+
+/****************************************************************************
+PARAMETERS:
+rm - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=00 addressing. Also enables the
+decoding of instructions.
+
+NOTE: The code which specifies the corresponding segment (ds vs ss)
+ below in the case of [BP+..]. The assumption here is that at the
+ point that this subroutine is called, the bit corresponding to
+ SYSMODE_SEG_DS_SS will be zero. After every instruction
+ except the segment override instructions, this bit (as well
+ as any bits indicating segment overrides) will be clear. So
+ if a SS access is needed, set this bit. Otherwise, DS access
+ occurs (unless any of the segment override bits are set).
+****************************************************************************/
+unsigned decode_rm00_address(
+ int rm)
+{
+ unsigned offset;
+
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ /* 32-bit addressing */
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF("[EAX]");
+ return M.x86.R_EAX;
+ case 1:
+ DECODE_PRINTF("[ECX]");
+ return M.x86.R_ECX;
+ case 2:
+ DECODE_PRINTF("[EDX]");
+ return M.x86.R_EDX;
+ case 3:
+ DECODE_PRINTF("[EBX]");
+ return M.x86.R_EBX;
+ case 4:
+ return decode_sib_address(0);
+ case 5:
+ offset = fetch_long_imm();
+ DECODE_PRINTF2("[%08x]", offset);
+ return offset;
+ case 6:
+ DECODE_PRINTF("[ESI]");
+ return M.x86.R_ESI;
+ case 7:
+ DECODE_PRINTF("[EDI]");
+ return M.x86.R_EDI;
+ }
+ } else {
+ /* 16-bit addressing */
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF("[BX+SI]");
+ return (M.x86.R_BX + M.x86.R_SI) & 0xffff;
+ case 1:
+ DECODE_PRINTF("[BX+DI]");
+ return (M.x86.R_BX + M.x86.R_DI) & 0xffff;
+ case 2:
+ DECODE_PRINTF("[BP+SI]");
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_SI) & 0xffff;
+ case 3:
+ DECODE_PRINTF("[BP+DI]");
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_DI) & 0xffff;
+ case 4:
+ DECODE_PRINTF("[SI]");
+ return M.x86.R_SI;
+ case 5:
+ DECODE_PRINTF("[DI]");
+ return M.x86.R_DI;
+ case 6:
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x]", offset);
+ return offset;
+ case 7:
+ DECODE_PRINTF("[BX]");
+ return M.x86.R_BX;
+ }
+ }
+ HALT_SYS();
+ return 0;
+}
+
+/****************************************************************************
+PARAMETERS:
+rm - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=01 addressing. Also enables the
+decoding of instructions.
+****************************************************************************/
+unsigned decode_rm01_address(
+ int rm)
+{
+ int displacement;
+
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ /* 32-bit addressing */
+ if (rm != 4)
+ displacement = (s8)fetch_byte_imm();
+ else
+ displacement = 0;
+
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[EAX]", displacement);
+ return M.x86.R_EAX + displacement;
+ case 1:
+ DECODE_PRINTF2("%d[ECX]", displacement);
+ return M.x86.R_ECX + displacement;
+ case 2:
+ DECODE_PRINTF2("%d[EDX]", displacement);
+ return M.x86.R_EDX + displacement;
+ case 3:
+ DECODE_PRINTF2("%d[EBX]", displacement);
+ return M.x86.R_EBX + displacement;
+ case 4: {
+ int offset = decode_sib_address(1);
+ displacement = (s8)fetch_byte_imm();
+ DECODE_PRINTF2("[%d]", displacement);
+ return offset + displacement;
+ }
+ case 5:
+ DECODE_PRINTF2("%d[EBP]", displacement);
+ return M.x86.R_EBP + displacement;
+ case 6:
+ DECODE_PRINTF2("%d[ESI]", displacement);
+ return M.x86.R_ESI + displacement;
+ case 7:
+ DECODE_PRINTF2("%d[EDI]", displacement);
+ return M.x86.R_EDI + displacement;
+ }
+ } else {
+ /* 16-bit addressing */
+ displacement = (s8)fetch_byte_imm();
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[BX+SI]", displacement);
+ return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
+ case 1:
+ DECODE_PRINTF2("%d[BX+DI]", displacement);
+ return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
+ case 2:
+ DECODE_PRINTF2("%d[BP+SI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
+ case 3:
+ DECODE_PRINTF2("%d[BP+DI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
+ case 4:
+ DECODE_PRINTF2("%d[SI]", displacement);
+ return (M.x86.R_SI + displacement) & 0xffff;
+ case 5:
+ DECODE_PRINTF2("%d[DI]", displacement);
+ return (M.x86.R_DI + displacement) & 0xffff;
+ case 6:
+ DECODE_PRINTF2("%d[BP]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + displacement) & 0xffff;
+ case 7:
+ DECODE_PRINTF2("%d[BX]", displacement);
+ return (M.x86.R_BX + displacement) & 0xffff;
+ }
+ }
+ HALT_SYS();
+ return 0; /* SHOULD NOT HAPPEN */
+}
+
+/****************************************************************************
+PARAMETERS:
+rm - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding
+
+REMARKS:
+Return the offset given by mod=10 addressing. Also enables the
+decoding of instructions.
+****************************************************************************/
+unsigned decode_rm10_address(
+ int rm)
+{
+ if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+ int displacement;
+
+ /* 32-bit addressing */
+ if (rm != 4)
+ displacement = (s32)fetch_long_imm();
+ else
+ displacement = 0;
+
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[EAX]", displacement);
+ return M.x86.R_EAX + displacement;
+ case 1:
+ DECODE_PRINTF2("%d[ECX]", displacement);
+ return M.x86.R_ECX + displacement;
+ case 2:
+ DECODE_PRINTF2("%d[EDX]", displacement);
+ return M.x86.R_EDX + displacement;
+ case 3:
+ DECODE_PRINTF2("%d[EBX]", displacement);
+ return M.x86.R_EBX + displacement;
+ case 4: {
+ int offset = decode_sib_address(2);
+ displacement = (s32)fetch_long_imm();
+ DECODE_PRINTF2("[%d]", displacement);
+ return offset + displacement;
+ }
+ case 5:
+ DECODE_PRINTF2("%d[EBP]", displacement);
+ return M.x86.R_EBP + displacement;
+ case 6:
+ DECODE_PRINTF2("%d[ESI]", displacement);
+ return M.x86.R_ESI + displacement;
+ case 7:
+ DECODE_PRINTF2("%d[EDI]", displacement);
+ return M.x86.R_EDI + displacement;
+ }
+ } else {
+ int displacement = (s16)fetch_word_imm();
+
+ /* 16-bit addressing */
+ switch (rm) {
+ case 0:
+ DECODE_PRINTF2("%d[BX+SI]", displacement);
+ return (M.x86.R_BX + M.x86.R_SI + displacement) & 0xffff;
+ case 1:
+ DECODE_PRINTF2("%d[BX+DI]", displacement);
+ return (M.x86.R_BX + M.x86.R_DI + displacement) & 0xffff;
+ case 2:
+ DECODE_PRINTF2("%d[BP+SI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_SI + displacement) & 0xffff;
+ case 3:
+ DECODE_PRINTF2("%d[BP+DI]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + M.x86.R_DI + displacement) & 0xffff;
+ case 4:
+ DECODE_PRINTF2("%d[SI]", displacement);
+ return (M.x86.R_SI + displacement) & 0xffff;
+ case 5:
+ DECODE_PRINTF2("%d[DI]", displacement);
+ return (M.x86.R_DI + displacement) & 0xffff;
+ case 6:
+ DECODE_PRINTF2("%d[BP]", displacement);
+ M.x86.mode |= SYSMODE_SEG_DS_SS;
+ return (M.x86.R_BP + displacement) & 0xffff;
+ case 7:
+ DECODE_PRINTF2("%d[BX]", displacement);
+ return (M.x86.R_BX + displacement) & 0xffff;
+ }
+ }
+ HALT_SYS();
+ return 0; /* SHOULD NOT HAPPEN */
+}
+
+
+/****************************************************************************
+PARAMETERS:
+mod - modifier
+rm - RM value to decode
+
+RETURNS:
+Offset in memory for the address decoding, multiplexing calls to
+the decode_rmXX_address functions
+
+REMARKS:
+Return the offset given by "mod" addressing.
+****************************************************************************/
+
+unsigned decode_rmXX_address(int mod, int rm)
+{
+ if(mod == 0)
+ return decode_rm00_address(rm);
+ if(mod == 1)
+ return decode_rm01_address(rm);
+ return decode_rm10_address(rm);
+}
+
+
+
diff --git a/src/devices/emulator/x86emu/decode.h b/src/devices/emulator/x86emu/decode.h
new file mode 100644
index 0000000000..321a345399
--- /dev/null
+++ b/src/devices/emulator/x86emu/decode.h
@@ -0,0 +1,87 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for instruction decoding logic.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_DECODE_H
+#define __X86EMU_DECODE_H
+
+/*---------------------- Macros and type definitions ----------------------*/
+
+/* Instruction Decoding Stuff */
+
+#define FETCH_DECODE_MODRM(mod,rh,rl) fetch_decode_modrm(&mod,&rh,&rl)
+#define DECODE_RM_BYTE_REGISTER(r) decode_rm_byte_register(r)
+#define DECODE_RM_WORD_REGISTER(r) decode_rm_word_register(r)
+#define DECODE_RM_LONG_REGISTER(r) decode_rm_long_register(r)
+#define DECODE_CLEAR_SEGOVR() M.x86.mode &= ~SYSMODE_CLRMASK
+
+/*-------------------------- Function Prototypes --------------------------*/
+
+#ifdef __cplusplus
+extern "C" { /* Use "C" linkage when in C++ mode */
+#endif
+
+void x86emu_intr_raise (u8 type);
+void fetch_decode_modrm (int *mod,int *regh,int *regl);
+u8 fetch_byte_imm (void);
+u16 fetch_word_imm (void);
+u32 fetch_long_imm (void);
+u8 fetch_data_byte (uint offset);
+u8 fetch_data_byte_abs (uint segment, uint offset);
+u16 fetch_data_word (uint offset);
+u16 fetch_data_word_abs (uint segment, uint offset);
+u32 fetch_data_long (uint offset);
+u32 fetch_data_long_abs (uint segment, uint offset);
+void store_data_byte (uint offset, u8 val);
+void store_data_byte_abs (uint segment, uint offset, u8 val);
+void store_data_word (uint offset, u16 val);
+void store_data_word_abs (uint segment, uint offset, u16 val);
+void store_data_long (uint offset, u32 val);
+void store_data_long_abs (uint segment, uint offset, u32 val);
+u8* decode_rm_byte_register(int reg);
+u16* decode_rm_word_register(int reg);
+u32* decode_rm_long_register(int reg);
+u16* decode_rm_seg_register(int reg);
+unsigned decode_rm00_address(int rm);
+unsigned decode_rm01_address(int rm);
+unsigned decode_rm10_address(int rm);
+
+#ifdef __cplusplus
+} /* End of "C" linkage for C++ */
+#endif
+
+#endif /* __X86EMU_DECODE_H */
diff --git a/src/devices/emulator/x86emu/fpu.c b/src/devices/emulator/x86emu/fpu.c
new file mode 100644
index 0000000000..85f55c8854
--- /dev/null
+++ b/src/devices/emulator/x86emu/fpu.c
@@ -0,0 +1,945 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file contains the code to implement the decoding and
+* emulation of the FPU instructions.
+*
+****************************************************************************/
+
+#include "x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/* opcode=0xd8 */
+void x86emuOp_esc_coprocess_d8(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ESC D8\n");
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+static char *x86emu_fpu_op_d9_tab[] = {
+ "FLD\tDWORD PTR ", "ESC_D9\t", "FST\tDWORD PTR ", "FSTP\tDWORD PTR ",
+ "FLDENV\t", "FLDCW\t", "FSTENV\t", "FSTCW\t",
+
+ "FLD\tDWORD PTR ", "ESC_D9\t", "FST\tDWORD PTR ", "FSTP\tDWORD PTR ",
+ "FLDENV\t", "FLDCW\t", "FSTENV\t", "FSTCW\t",
+
+ "FLD\tDWORD PTR ", "ESC_D9\t", "FST\tDWORD PTR ", "FSTP\tDWORD PTR ",
+ "FLDENV\t", "FLDCW\t", "FSTENV\t", "FSTCW\t",
+};
+
+static char *x86emu_fpu_op_d9_tab1[] = {
+ "FLD\t", "FLD\t", "FLD\t", "FLD\t",
+ "FLD\t", "FLD\t", "FLD\t", "FLD\t",
+
+ "FXCH\t", "FXCH\t", "FXCH\t", "FXCH\t",
+ "FXCH\t", "FXCH\t", "FXCH\t", "FXCH\t",
+
+ "FNOP", "ESC_D9", "ESC_D9", "ESC_D9",
+ "ESC_D9", "ESC_D9", "ESC_D9", "ESC_D9",
+
+ "FSTP\t", "FSTP\t", "FSTP\t", "FSTP\t",
+ "FSTP\t", "FSTP\t", "FSTP\t", "FSTP\t",
+
+ "FCHS", "FABS", "ESC_D9", "ESC_D9",
+ "FTST", "FXAM", "ESC_D9", "ESC_D9",
+
+ "FLD1", "FLDL2T", "FLDL2E", "FLDPI",
+ "FLDLG2", "FLDLN2", "FLDZ", "ESC_D9",
+
+ "F2XM1", "FYL2X", "FPTAN", "FPATAN",
+ "FXTRACT", "ESC_D9", "FDECSTP", "FINCSTP",
+
+ "FPREM", "FYL2XP1", "FSQRT", "ESC_D9",
+ "FRNDINT", "FSCALE", "ESC_D9", "ESC_D9",
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xd9 */
+void x86emuOp_esc_coprocess_d9(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (mod != 3) {
+ DECODE_PRINTINSTR32(x86emu_fpu_op_d9_tab, mod, rh, rl);
+ } else {
+ DECODE_PRINTF(x86emu_fpu_op_d9_tab1[(rh << 3) + rl]);
+ }
+#endif
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ if (rh < 4) {
+ DECODE_PRINTF2("ST(%d)\n", stkelem);
+ } else {
+ DECODE_PRINTF("\n");
+ }
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ /* execute */
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_R_fld(X86EMU_FPU_STKTOP, stkelem);
+ break;
+ case 1:
+ x86emu_fpu_R_fxch(X86EMU_FPU_STKTOP, stkelem);
+ break;
+ case 2:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_nop();
+ break;
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ case 3:
+ x86emu_fpu_R_fstp(X86EMU_FPU_STKTOP, stkelem);
+ break;
+ case 4:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_fchs(X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fabs(X86EMU_FPU_STKTOP);
+ break;
+ case 4:
+ x86emu_fpu_R_ftst(X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_R_fxam(X86EMU_FPU_STKTOP);
+ break;
+ default:
+ /* 2,3,6,7 */
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+
+ case 5:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_fld1(X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fldl2t(X86EMU_FPU_STKTOP);
+ break;
+ case 2:
+ x86emu_fpu_R_fldl2e(X86EMU_FPU_STKTOP);
+ break;
+ case 3:
+ x86emu_fpu_R_fldpi(X86EMU_FPU_STKTOP);
+ break;
+ case 4:
+ x86emu_fpu_R_fldlg2(X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_R_fldln2(X86EMU_FPU_STKTOP);
+ break;
+ case 6:
+ x86emu_fpu_R_fldz(X86EMU_FPU_STKTOP);
+ break;
+ default:
+ /* 7 */
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+
+ case 6:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_f2xm1(X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fyl2x(X86EMU_FPU_STKTOP);
+ break;
+ case 2:
+ x86emu_fpu_R_fptan(X86EMU_FPU_STKTOP);
+ break;
+ case 3:
+ x86emu_fpu_R_fpatan(X86EMU_FPU_STKTOP);
+ break;
+ case 4:
+ x86emu_fpu_R_fxtract(X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_illegal();
+ break;
+ case 6:
+ x86emu_fpu_R_decstp();
+ break;
+ case 7:
+ x86emu_fpu_R_incstp();
+ break;
+ }
+ break;
+
+ case 7:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_fprem(X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fyl2xp1(X86EMU_FPU_STKTOP);
+ break;
+ case 2:
+ x86emu_fpu_R_fsqrt(X86EMU_FPU_STKTOP);
+ break;
+ case 3:
+ x86emu_fpu_illegal();
+ break;
+ case 4:
+ x86emu_fpu_R_frndint(X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_R_fscale(X86EMU_FPU_STKTOP);
+ break;
+ case 6:
+ case 7:
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fld(X86EMU_FPU_FLOAT, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_illegal();
+ break;
+ case 2:
+ x86emu_fpu_M_fst(X86EMU_FPU_FLOAT, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_fstp(X86EMU_FPU_FLOAT, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_fldenv(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_M_fldcw(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_M_fstenv(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_fstcw(X86EMU_FPU_WORD, destoffset);
+ break;
+ }
+ }
+ }
+#endif /* X86EMU_FPU_PRESENT */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+char *x86emu_fpu_op_da_tab[] = {
+ "FIADD\tDWORD PTR ", "FIMUL\tDWORD PTR ", "FICOM\tDWORD PTR ",
+ "FICOMP\tDWORD PTR ",
+ "FISUB\tDWORD PTR ", "FISUBR\tDWORD PTR ", "FIDIV\tDWORD PTR ",
+ "FIDIVR\tDWORD PTR ",
+
+ "FIADD\tDWORD PTR ", "FIMUL\tDWORD PTR ", "FICOM\tDWORD PTR ",
+ "FICOMP\tDWORD PTR ",
+ "FISUB\tDWORD PTR ", "FISUBR\tDWORD PTR ", "FIDIV\tDWORD PTR ",
+ "FIDIVR\tDWORD PTR ",
+
+ "FIADD\tDWORD PTR ", "FIMUL\tDWORD PTR ", "FICOM\tDWORD PTR ",
+ "FICOMP\tDWORD PTR ",
+ "FISUB\tDWORD PTR ", "FISUBR\tDWORD PTR ", "FIDIV\tDWORD PTR ",
+ "FIDIVR\tDWORD PTR ",
+
+ "ESC_DA ", "ESC_DA ", "ESC_DA ", "ESC_DA ",
+ "ESC_DA ", "ESC_DA ", "ESC_DA ", "ESC_DA ",
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xda */
+void x86emuOp_esc_coprocess_da(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTINSTR32(x86emu_fpu_op_da_tab, mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ DECODE_PRINTF2("\tST(%d),ST\n", stkelem);
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ switch (mod) {
+ case 3:
+ x86emu_fpu_illegal();
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_iadd(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_M_imul(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 2:
+ x86emu_fpu_M_icom(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_icomp(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_isub(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_M_isubr(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_M_idiv(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_idivr(X86EMU_FPU_SHORT, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+char *x86emu_fpu_op_db_tab[] = {
+ "FILD\tDWORD PTR ", "ESC_DB\t19", "FIST\tDWORD PTR ", "FISTP\tDWORD PTR ",
+ "ESC_DB\t1C", "FLD\tTBYTE PTR ", "ESC_DB\t1E", "FSTP\tTBYTE PTR ",
+
+ "FILD\tDWORD PTR ", "ESC_DB\t19", "FIST\tDWORD PTR ", "FISTP\tDWORD PTR ",
+ "ESC_DB\t1C", "FLD\tTBYTE PTR ", "ESC_DB\t1E", "FSTP\tTBYTE PTR ",
+
+ "FILD\tDWORD PTR ", "ESC_DB\t19", "FIST\tDWORD PTR ", "FISTP\tDWORD PTR ",
+ "ESC_DB\t1C", "FLD\tTBYTE PTR ", "ESC_DB\t1E", "FSTP\tTBYTE PTR ",
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xdb */
+void x86emuOp_esc_coprocess_db(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (mod != 3) {
+ DECODE_PRINTINSTR32(x86emu_fpu_op_db_tab, mod, rh, rl);
+ } else if (rh == 4) { /* === 11 10 0 nnn */
+ switch (rl) {
+ case 0:
+ DECODE_PRINTF("FENI\n");
+ break;
+ case 1:
+ DECODE_PRINTF("FDISI\n");
+ break;
+ case 2:
+ DECODE_PRINTF("FCLEX\n");
+ break;
+ case 3:
+ DECODE_PRINTF("FINIT\n");
+ break;
+ }
+ } else {
+ DECODE_PRINTF2("ESC_DB %0x\n", (mod << 6) + (rh << 3) + (rl));
+ }
+#endif /* DEBUG */
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ break;
+ case 3: /* register to register */
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ /* execute */
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 4:
+ switch (rl) {
+ case 0:
+ x86emu_fpu_R_feni();
+ break;
+ case 1:
+ x86emu_fpu_R_fdisi();
+ break;
+ case 2:
+ x86emu_fpu_R_fclex();
+ break;
+ case 3:
+ x86emu_fpu_R_finit();
+ break;
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fild(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_illegal();
+ break;
+ case 2:
+ x86emu_fpu_M_fist(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_fistp(X86EMU_FPU_SHORT, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_illegal();
+ break;
+ case 5:
+ x86emu_fpu_M_fld(X86EMU_FPU_LDBL, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_illegal();
+ break;
+ case 7:
+ x86emu_fpu_M_fstp(X86EMU_FPU_LDBL, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+char *x86emu_fpu_op_dc_tab[] = {
+ "FADD\tQWORD PTR ", "FMUL\tQWORD PTR ", "FCOM\tQWORD PTR ",
+ "FCOMP\tQWORD PTR ",
+ "FSUB\tQWORD PTR ", "FSUBR\tQWORD PTR ", "FDIV\tQWORD PTR ",
+ "FDIVR\tQWORD PTR ",
+
+ "FADD\tQWORD PTR ", "FMUL\tQWORD PTR ", "FCOM\tQWORD PTR ",
+ "FCOMP\tQWORD PTR ",
+ "FSUB\tQWORD PTR ", "FSUBR\tQWORD PTR ", "FDIV\tQWORD PTR ",
+ "FDIVR\tQWORD PTR ",
+
+ "FADD\tQWORD PTR ", "FMUL\tQWORD PTR ", "FCOM\tQWORD PTR ",
+ "FCOMP\tQWORD PTR ",
+ "FSUB\tQWORD PTR ", "FSUBR\tQWORD PTR ", "FDIV\tQWORD PTR ",
+ "FDIVR\tQWORD PTR ",
+
+ "FADD\t", "FMUL\t", "FCOM\t", "FCOMP\t",
+ "FSUBR\t", "FSUB\t", "FDIVR\t", "FDIV\t",
+};
+#endif /* DEBUG */
+
+/* opcode=0xdc */
+void x86emuOp_esc_coprocess_dc(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTINSTR32(x86emu_fpu_op_dc_tab, mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ DECODE_PRINTF2("\tST(%d),ST\n", stkelem);
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ /* execute */
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_R_fadd(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fmul(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 2:
+ x86emu_fpu_R_fcom(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 3:
+ x86emu_fpu_R_fcomp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 4:
+ x86emu_fpu_R_fsubr(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_R_fsub(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 6:
+ x86emu_fpu_R_fdivr(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 7:
+ x86emu_fpu_R_fdiv(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ }
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fadd(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_M_fmul(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 2:
+ x86emu_fpu_M_fcom(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_fcomp(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_fsub(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_M_fsubr(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_M_fdiv(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_fdivr(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+static char *x86emu_fpu_op_dd_tab[] = {
+ "FLD\tQWORD PTR ", "ESC_DD\t29,", "FST\tQWORD PTR ", "FSTP\tQWORD PTR ",
+ "FRSTOR\t", "ESC_DD\t2D,", "FSAVE\t", "FSTSW\t",
+
+ "FLD\tQWORD PTR ", "ESC_DD\t29,", "FST\tQWORD PTR ", "FSTP\tQWORD PTR ",
+ "FRSTOR\t", "ESC_DD\t2D,", "FSAVE\t", "FSTSW\t",
+
+ "FLD\tQWORD PTR ", "ESC_DD\t29,", "FST\tQWORD PTR ", "FSTP\tQWORD PTR ",
+ "FRSTOR\t", "ESC_DD\t2D,", "FSAVE\t", "FSTSW\t",
+
+ "FFREE\t", "FXCH\t", "FST\t", "FSTP\t",
+ "ESC_DD\t2C,", "ESC_DD\t2D,", "ESC_DD\t2E,", "ESC_DD\t2F,",
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xdd */
+void x86emuOp_esc_coprocess_dd(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTINSTR32(x86emu_fpu_op_dd_tab, mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ DECODE_PRINTF2("\tST(%d),ST\n", stkelem);
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_R_ffree(stkelem);
+ break;
+ case 1:
+ x86emu_fpu_R_fxch(stkelem);
+ break;
+ case 2:
+ x86emu_fpu_R_fst(stkelem); /* register version */
+ break;
+ case 3:
+ x86emu_fpu_R_fstp(stkelem); /* register version */
+ break;
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fld(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_illegal();
+ break;
+ case 2:
+ x86emu_fpu_M_fst(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_fstp(X86EMU_FPU_DOUBLE, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_frstor(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_illegal();
+ break;
+ case 6:
+ x86emu_fpu_M_fsave(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_fstsw(X86EMU_FPU_WORD, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+static char *x86emu_fpu_op_de_tab[] =
+{
+ "FIADD\tWORD PTR ", "FIMUL\tWORD PTR ", "FICOM\tWORD PTR ",
+ "FICOMP\tWORD PTR ",
+ "FISUB\tWORD PTR ", "FISUBR\tWORD PTR ", "FIDIV\tWORD PTR ",
+ "FIDIVR\tWORD PTR ",
+
+ "FIADD\tWORD PTR ", "FIMUL\tWORD PTR ", "FICOM\tWORD PTR ",
+ "FICOMP\tWORD PTR ",
+ "FISUB\tWORD PTR ", "FISUBR\tWORD PTR ", "FIDIV\tWORD PTR ",
+ "FIDIVR\tWORD PTR ",
+
+ "FIADD\tWORD PTR ", "FIMUL\tWORD PTR ", "FICOM\tWORD PTR ",
+ "FICOMP\tWORD PTR ",
+ "FISUB\tWORD PTR ", "FISUBR\tWORD PTR ", "FIDIV\tWORD PTR ",
+ "FIDIVR\tWORD PTR ",
+
+ "FADDP\t", "FMULP\t", "FCOMP\t", "FCOMPP\t",
+ "FSUBRP\t", "FSUBP\t", "FDIVRP\t", "FDIVP\t",
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xde */
+void x86emuOp_esc_coprocess_de(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTINSTR32(x86emu_fpu_op_de_tab, mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ DECODE_PRINTF2("\tST(%d),ST\n", stkelem);
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_R_faddp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 1:
+ x86emu_fpu_R_fmulp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 2:
+ x86emu_fpu_R_fcomp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 3:
+ if (stkelem == 1)
+ x86emu_fpu_R_fcompp(stkelem, X86EMU_FPU_STKTOP);
+ else
+ x86emu_fpu_illegal();
+ break;
+ case 4:
+ x86emu_fpu_R_fsubrp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 5:
+ x86emu_fpu_R_fsubp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 6:
+ x86emu_fpu_R_fdivrp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ case 7:
+ x86emu_fpu_R_fdivp(stkelem, X86EMU_FPU_STKTOP);
+ break;
+ }
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fiadd(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_M_fimul(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 2:
+ x86emu_fpu_M_ficom(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_ficomp(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_fisub(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_M_fisubr(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_M_fidiv(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_fidivr(X86EMU_FPU_WORD, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
+
+#ifdef DEBUG
+
+static char *x86emu_fpu_op_df_tab[] = {
+ /* mod == 00 */
+ "FILD\tWORD PTR ", "ESC_DF\t39\n", "FIST\tWORD PTR ", "FISTP\tWORD PTR ",
+ "FBLD\tTBYTE PTR ", "FILD\tQWORD PTR ", "FBSTP\tTBYTE PTR ",
+ "FISTP\tQWORD PTR ",
+
+ /* mod == 01 */
+ "FILD\tWORD PTR ", "ESC_DF\t39 ", "FIST\tWORD PTR ", "FISTP\tWORD PTR ",
+ "FBLD\tTBYTE PTR ", "FILD\tQWORD PTR ", "FBSTP\tTBYTE PTR ",
+ "FISTP\tQWORD PTR ",
+
+ /* mod == 10 */
+ "FILD\tWORD PTR ", "ESC_DF\t39 ", "FIST\tWORD PTR ", "FISTP\tWORD PTR ",
+ "FBLD\tTBYTE PTR ", "FILD\tQWORD PTR ", "FBSTP\tTBYTE PTR ",
+ "FISTP\tQWORD PTR ",
+
+ /* mod == 11 */
+ "FFREE\t", "FXCH\t", "FST\t", "FSTP\t",
+ "ESC_DF\t3C,", "ESC_DF\t3D,", "ESC_DF\t3E,", "ESC_DF\t3F,"
+};
+
+#endif /* DEBUG */
+
+/* opcode=0xdf */
+void x86emuOp_esc_coprocess_df(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 stkelem;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTINSTR32(x86emu_fpu_op_df_tab, mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ break;
+ case 3: /* register to register */
+ stkelem = (u8)rl;
+ DECODE_PRINTF2("\tST(%d)\n", stkelem);
+ break;
+ }
+#ifdef X86EMU_FPU_PRESENT
+ switch (mod) {
+ case 3:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_R_ffree(stkelem);
+ break;
+ case 1:
+ x86emu_fpu_R_fxch(stkelem);
+ break;
+ case 2:
+ x86emu_fpu_R_fst(stkelem); /* register version */
+ break;
+ case 3:
+ x86emu_fpu_R_fstp(stkelem); /* register version */
+ break;
+ default:
+ x86emu_fpu_illegal();
+ break;
+ }
+ break;
+ default:
+ switch (rh) {
+ case 0:
+ x86emu_fpu_M_fild(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 1:
+ x86emu_fpu_illegal();
+ break;
+ case 2:
+ x86emu_fpu_M_fist(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 3:
+ x86emu_fpu_M_fistp(X86EMU_FPU_WORD, destoffset);
+ break;
+ case 4:
+ x86emu_fpu_M_fbld(X86EMU_FPU_BSD, destoffset);
+ break;
+ case 5:
+ x86emu_fpu_M_fild(X86EMU_FPU_LONG, destoffset);
+ break;
+ case 6:
+ x86emu_fpu_M_fbstp(X86EMU_FPU_BSD, destoffset);
+ break;
+ case 7:
+ x86emu_fpu_M_fistp(X86EMU_FPU_LONG, destoffset);
+ break;
+ }
+ }
+#endif
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR_NO_TRACE();
+}
diff --git a/src/devices/emulator/x86emu/fpu.h b/src/devices/emulator/x86emu/fpu.h
new file mode 100644
index 0000000000..5fb271463b
--- /dev/null
+++ b/src/devices/emulator/x86emu/fpu.h
@@ -0,0 +1,61 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for FPU instruction decoding.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_FPU_H
+#define __X86EMU_FPU_H
+
+#ifdef __cplusplus
+extern "C" { /* Use "C" linkage when in C++ mode */
+#endif
+
+/* these have to be defined, whether 8087 support compiled in or not. */
+
+extern void x86emuOp_esc_coprocess_d8 (u8 op1);
+extern void x86emuOp_esc_coprocess_d9 (u8 op1);
+extern void x86emuOp_esc_coprocess_da (u8 op1);
+extern void x86emuOp_esc_coprocess_db (u8 op1);
+extern void x86emuOp_esc_coprocess_dc (u8 op1);
+extern void x86emuOp_esc_coprocess_dd (u8 op1);
+extern void x86emuOp_esc_coprocess_de (u8 op1);
+extern void x86emuOp_esc_coprocess_df (u8 op1);
+
+#ifdef __cplusplus
+} /* End of "C" linkage for C++ */
+#endif
+
+#endif /* __X86EMU_FPU_H */
diff --git a/src/devices/emulator/x86emu/ops.c b/src/devices/emulator/x86emu/ops.c
new file mode 100644
index 0000000000..5666dea40a
--- /dev/null
+++ b/src/devices/emulator/x86emu/ops.c
@@ -0,0 +1,5427 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file includes subroutines to implement the decoding
+* and emulation of all the x86 processor instructions.
+*
+* There are approximately 250 subroutines in here, which correspond
+* to the 256 byte-"opcodes" found on the 8086. The table which
+* dispatches this is found in the files optab.[ch].
+*
+* Each opcode proc has a comment preceeding it which gives it's table
+* address. Several opcodes are missing (undefined) in the table.
+*
+* Each proc includes information for decoding (DECODE_PRINTF and
+* DECODE_PRINTF2), debugging (TRACE_REGS, SINGLE_STEP), and misc
+* functions (START_OF_INSTR, END_OF_INSTR).
+*
+* Many of the procedures are *VERY* similar in coding. This has
+* allowed for a very large amount of code to be generated in a fairly
+* short amount of time (i.e. cut, paste, and modify). The result is
+* that much of the code below could have been folded into subroutines
+* for a large reduction in size of this file. The downside would be
+* that there would be a penalty in execution speed. The file could
+* also have been *MUCH* larger by inlining certain functions which
+* were called. This could have resulted even faster execution. The
+* prime directive I used to decide whether to inline the code or to
+* modularize it, was basically: 1) no unnecessary subroutine calls,
+* 2) no routines more than about 200 lines in size, and 3) modularize
+* any code that I might not get right the first time. The fetch_*
+* subroutines fall into the latter category. The The decode_* fall
+* into the second category. The coding of the "switch(mod){ .... }"
+* in many of the subroutines below falls into the first category.
+* Especially, the coding of {add,and,or,sub,...}_{byte,word}
+* subroutines are an especially glaring case of the third guideline.
+* Since so much of the code is cloned from other modules (compare
+* opcode #00 to opcode #01), making the basic operations subroutine
+* calls is especially important; otherwise mistakes in coding an
+* "add" would represent a nightmare in maintenance.
+*
+****************************************************************************/
+
+#include "x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/* constant arrays to do several instructions in just one function */
+
+#ifdef DEBUG
+static char *x86emu_GenOpName[8] = {
+ "ADD", "OR", "ADC", "SBB", "AND", "SUB", "XOR", "CMP"};
+#endif
+
+/* used by several opcodes */
+static u8 (*genop_byte_operation[])(u8 d, u8 s) =
+{
+ add_byte, /* 00 */
+ or_byte, /* 01 */
+ adc_byte, /* 02 */
+ sbb_byte, /* 03 */
+ and_byte, /* 04 */
+ sub_byte, /* 05 */
+ xor_byte, /* 06 */
+ cmp_byte, /* 07 */
+};
+
+static u16 (*genop_word_operation[])(u16 d, u16 s) =
+{
+ add_word, /*00 */
+ or_word, /*01 */
+ adc_word, /*02 */
+ sbb_word, /*03 */
+ and_word, /*04 */
+ sub_word, /*05 */
+ xor_word, /*06 */
+ cmp_word, /*07 */
+};
+
+static u32 (*genop_long_operation[])(u32 d, u32 s) =
+{
+ add_long, /*00 */
+ or_long, /*01 */
+ adc_long, /*02 */
+ sbb_long, /*03 */
+ and_long, /*04 */
+ sub_long, /*05 */
+ xor_long, /*06 */
+ cmp_long, /*07 */
+};
+
+/* used by opcodes 80, c0, d0, and d2. */
+static u8(*opcD0_byte_operation[])(u8 d, u8 s) =
+{
+ rol_byte,
+ ror_byte,
+ rcl_byte,
+ rcr_byte,
+ shl_byte,
+ shr_byte,
+ shl_byte, /* sal_byte === shl_byte by definition */
+ sar_byte,
+};
+
+/* used by opcodes c1, d1, and d3. */
+static u16(*opcD1_word_operation[])(u16 s, u8 d) =
+{
+ rol_word,
+ ror_word,
+ rcl_word,
+ rcr_word,
+ shl_word,
+ shr_word,
+ shl_word, /* sal_byte === shl_byte by definition */
+ sar_word,
+};
+
+/* used by opcodes c1, d1, and d3. */
+static u32 (*opcD1_long_operation[])(u32 s, u8 d) =
+{
+ rol_long,
+ ror_long,
+ rcl_long,
+ rcr_long,
+ shl_long,
+ shr_long,
+ shl_long, /* sal_byte === shl_byte by definition */
+ sar_long,
+};
+
+#ifdef DEBUG
+
+static char *opF6_names[8] =
+ { "TEST\t", "", "NOT\t", "NEG\t", "MUL\t", "IMUL\t", "DIV\t", "IDIV\t" };
+
+#endif
+
+/****************************************************************************
+PARAMETERS:
+op1 - Instruction op code
+
+REMARKS:
+Handles illegal opcodes.
+****************************************************************************/
+void x86emuOp_illegal_op(
+ u8 op1)
+{
+ START_OF_INSTR();
+ if (M.x86.R_SP != 0) {
+ DECODE_PRINTF("ILLEGAL X86 OPCODE\n");
+ TRACE_REGS();
+ DB( printk("%04x:%04x: %02X ILLEGAL X86 OPCODE!\n",
+ M.x86.R_CS, M.x86.R_IP-1,op1));
+ HALT_SYS();
+ }
+ else {
+ /* If we get here, it means the stack pointer is back to zero
+ * so we are just returning from an emulator service call
+ * so therte is no need to display an error message. We trap
+ * the emulator with an 0xF1 opcode to finish the service
+ * call.
+ */
+ X86EMU_halt_sys();
+ }
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38
+****************************************************************************/
+void x86emuOp_genop_byte_RM_R(u8 op1)
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 *destreg, *srcreg;
+ u8 destval;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if(mod<3)
+ { destoffset = decode_rmXX_address(mod,rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = genop_byte_operation[op1](destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ }
+ else
+ { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_byte_operation[op1](*destreg, *srcreg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x01, 0x09, 0x11, 0x19, 0x21, 0x29, 0x31, 0x39
+****************************************************************************/
+void x86emuOp_genop_word_RM_R(u8 op1)
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+
+ if(mod<3) {
+ destoffset = decode_rmXX_address(mod,rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = genop_long_operation[op1](destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = genop_word_operation[op1](destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_long_operation[op1](*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_word_operation[op1](*destreg, *srcreg);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x02, 0x0a, 0x12, 0x1a, 0x22, 0x2a, 0x32, 0x3a
+****************************************************************************/
+void x86emuOp_genop_byte_R_RM(u8 op1)
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod,rl);
+ srcval = fetch_data_byte(srcoffset);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ srcval = *srcreg;
+ }
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_byte_operation[op1](*destreg, srcval);
+
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x03, 0x0b, 0x13, 0x1b, 0x23, 0x2b, 0x33, 0x3b
+****************************************************************************/
+void x86emuOp_genop_word_R_RM(u8 op1)
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ u32 *destreg32, srcval;
+ u16 *destreg;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod,rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ destreg32 = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg32 = genop_long_operation[op1](*destreg32, srcval);
+ } else {
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_word_operation[op1](*destreg, srcval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ destreg32 = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg32 = genop_long_operation[op1](*destreg32, *srcreg);
+ } else {
+ u16 *srcreg;
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = genop_word_operation[op1](*destreg, *srcreg);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x04, 0x0c, 0x14, 0x1c, 0x24, 0x2c, 0x34, 0x3c
+****************************************************************************/
+void x86emuOp_genop_byte_AL_IMM(u8 op1)
+{
+ u8 srcval;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = genop_byte_operation[op1](M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcodes 0x05, 0x0d, 0x15, 0x1d, 0x25, 0x2d, 0x35, 0x3d
+****************************************************************************/
+void x86emuOp_genop_word_AX_IMM(u8 op1)
+{
+ u32 srcval;
+
+ op1 = (op1 >> 3) & 0x7;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF(x86emu_GenOpName[op1]);
+ DECODE_PRINTF("\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = genop_long_operation[op1](M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = genop_word_operation[op1](M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x06
+****************************************************************************/
+void x86emuOp_push_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tES\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_ES);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x07
+****************************************************************************/
+void x86emuOp_pop_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tES\n");
+ TRACE_AND_STEP();
+ M.x86.R_ES = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0e
+****************************************************************************/
+void x86emuOp_push_CS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tCS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f. Escape for two-byte opcode (286 or better)
+****************************************************************************/
+void x86emuOp_two_byte(u8 X86EMU_UNUSED(op1))
+{
+ u8 op2 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ (*x86emu_optab2[op2])(op2);
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x16
+****************************************************************************/
+void x86emuOp_push_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tSS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_SS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x17
+****************************************************************************/
+void x86emuOp_pop_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tSS\n");
+ TRACE_AND_STEP();
+ M.x86.R_SS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1e
+****************************************************************************/
+void x86emuOp_push_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tDS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_DS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1f
+****************************************************************************/
+void x86emuOp_pop_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tDS\n");
+ TRACE_AND_STEP();
+ M.x86.R_DS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x26
+****************************************************************************/
+void x86emuOp_segovr_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ES:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_ES;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x27
+****************************************************************************/
+void x86emuOp_daa(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DAA\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = daa_byte(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2e
+****************************************************************************/
+void x86emuOp_segovr_CS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("CS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_CS;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2f
+****************************************************************************/
+void x86emuOp_das(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DAS\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = das_byte(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x36
+****************************************************************************/
+void x86emuOp_segovr_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("SS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_SS;
+ /* no DECODE_CLEAR_SEGOVR ! */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x37
+****************************************************************************/
+void x86emuOp_aaa(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("AAA\n");
+ TRACE_AND_STEP();
+ M.x86.R_AX = aaa_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3e
+****************************************************************************/
+void x86emuOp_segovr_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_DS;
+ /* NO DECODE_CLEAR_SEGOVR! */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3f
+****************************************************************************/
+void x86emuOp_aas(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("AAS\n");
+ TRACE_AND_STEP();
+ M.x86.R_AX = aas_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x40 - 0x47
+****************************************************************************/
+void x86emuOp_inc_register(u8 op1)
+{
+ START_OF_INSTR();
+ op1 &= 0x7;
+ DECODE_PRINTF("INC\t");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg;
+ reg = DECODE_RM_LONG_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = inc_long(*reg);
+ } else {
+ u16 *reg;
+ reg = DECODE_RM_WORD_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = inc_word(*reg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x48 - 0x4F
+****************************************************************************/
+void x86emuOp_dec_register(u8 op1)
+{
+ START_OF_INSTR();
+ op1 &= 0x7;
+ DECODE_PRINTF("DEC\t");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg;
+ reg = DECODE_RM_LONG_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = dec_long(*reg);
+ } else {
+ u16 *reg;
+ reg = DECODE_RM_WORD_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = dec_word(*reg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x50 - 0x57
+****************************************************************************/
+void x86emuOp_push_register(u8 op1)
+{
+ START_OF_INSTR();
+ op1 &= 0x7;
+ DECODE_PRINTF("PUSH\t");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg;
+ reg = DECODE_RM_LONG_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_long(*reg);
+ } else {
+ u16 *reg;
+ reg = DECODE_RM_WORD_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_word(*reg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x58 - 0x5F
+****************************************************************************/
+void x86emuOp_pop_register(u8 op1)
+{
+ START_OF_INSTR();
+ op1 &= 0x7;
+ DECODE_PRINTF("POP\t");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg;
+ reg = DECODE_RM_LONG_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = pop_long();
+ } else {
+ u16 *reg;
+ reg = DECODE_RM_WORD_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *reg = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x60
+****************************************************************************/
+void x86emuOp_push_all(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSHAD\n");
+ } else {
+ DECODE_PRINTF("PUSHA\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 old_sp = M.x86.R_ESP;
+
+ push_long(M.x86.R_EAX);
+ push_long(M.x86.R_ECX);
+ push_long(M.x86.R_EDX);
+ push_long(M.x86.R_EBX);
+ push_long(old_sp);
+ push_long(M.x86.R_EBP);
+ push_long(M.x86.R_ESI);
+ push_long(M.x86.R_EDI);
+ } else {
+ u16 old_sp = M.x86.R_SP;
+
+ push_word(M.x86.R_AX);
+ push_word(M.x86.R_CX);
+ push_word(M.x86.R_DX);
+ push_word(M.x86.R_BX);
+ push_word(old_sp);
+ push_word(M.x86.R_BP);
+ push_word(M.x86.R_SI);
+ push_word(M.x86.R_DI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x61
+****************************************************************************/
+void x86emuOp_pop_all(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POPAD\n");
+ } else {
+ DECODE_PRINTF("POPA\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = pop_long();
+ M.x86.R_ESI = pop_long();
+ M.x86.R_EBP = pop_long();
+ M.x86.R_ESP += 4; /* skip ESP */
+ M.x86.R_EBX = pop_long();
+ M.x86.R_EDX = pop_long();
+ M.x86.R_ECX = pop_long();
+ M.x86.R_EAX = pop_long();
+ } else {
+ M.x86.R_DI = pop_word();
+ M.x86.R_SI = pop_word();
+ M.x86.R_BP = pop_word();
+ M.x86.R_SP += 2; /* skip SP */
+ M.x86.R_BX = pop_word();
+ M.x86.R_DX = pop_word();
+ M.x86.R_CX = pop_word();
+ M.x86.R_AX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/*opcode 0x62 ILLEGAL OP, calls x86emuOp_illegal_op() */
+/*opcode 0x63 ILLEGAL OP, calls x86emuOp_illegal_op() */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x64
+****************************************************************************/
+void x86emuOp_segovr_FS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("FS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_FS;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x65
+****************************************************************************/
+void x86emuOp_segovr_GS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("GS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_GS;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x66 - prefix for 32-bit register
+****************************************************************************/
+void x86emuOp_prefix_data(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DATA:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_DATA;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x67 - prefix for 32-bit address
+****************************************************************************/
+void x86emuOp_prefix_addr(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ADDR:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_ADDR;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x68
+****************************************************************************/
+void x86emuOp_push_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 imm;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ imm = fetch_long_imm();
+ } else {
+ imm = fetch_word_imm();
+ }
+ DECODE_PRINTF2("PUSH\t%x\n", imm);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(imm);
+ } else {
+ push_word((u16)imm);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x69
+****************************************************************************/
+void x86emuOp_imul_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IMUL\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+ (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+ (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+ if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+ (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg,*srcreg;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ res = (s16)*srcreg * (s16)imm;
+ if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+ (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6a
+****************************************************************************/
+void x86emuOp_push_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ s16 imm;
+
+ START_OF_INSTR();
+ imm = (s8)fetch_byte_imm();
+ DECODE_PRINTF2("PUSH\t%d\n", imm);
+ TRACE_AND_STEP();
+ push_word(imm);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6b
+****************************************************************************/
+void x86emuOp_imul_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ s8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IMUL\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+ (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+ (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+ if ((((res_lo & 0x80000000) == 0) && (res_hi == 0x00000000)) ||
+ (((res_lo & 0x80000000) != 0) && (res_hi == 0xFFFFFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg,*srcreg;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)*srcreg * (s16)imm;
+ if ((((res & 0x8000) == 0) && ((res >> 16) == 0x0000)) ||
+ (((res & 0x8000) != 0) && ((res >> 16) == 0xFFFF))) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6c
+****************************************************************************/
+void x86emuOp_ins_byte(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("INSB\n");
+ ins(1);
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6d
+****************************************************************************/
+void x86emuOp_ins_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INSD\n");
+ ins(4);
+ } else {
+ DECODE_PRINTF("INSW\n");
+ ins(2);
+ }
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6e
+****************************************************************************/
+void x86emuOp_outs_byte(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("OUTSB\n");
+ outs(1);
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6f
+****************************************************************************/
+void x86emuOp_outs_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("OUTSD\n");
+ outs(4);
+ } else {
+ DECODE_PRINTF("OUTSW\n");
+ outs(2);
+ }
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x70 - 0x7F
+****************************************************************************/
+int x86emu_check_jump_condition(u8 op);
+
+void x86emuOp_jump_near_cond(u8 op1)
+{
+ s8 offset;
+ u16 target;
+ int cond;
+
+ /* jump to byte offset if overflow flag is set */
+ START_OF_INSTR();
+ cond = x86emu_check_jump_condition(op1 & 0xF);
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (cond)
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x80
+****************************************************************************/
+void x86emuOp_opc80_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+ u8 destval;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_byte_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x81
+****************************************************************************/
+void x86emuOp_opc81_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /*
+ * Know operation, decode the mod byte to find the addressing
+ * mode.
+ */
+ if (mod < 3) {
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 destval,imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_long_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ } else {
+ u16 *destreg;
+ u16 destval,imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_word_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x82
+****************************************************************************/
+void x86emuOp_opc82_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+ u8 destval;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction Similar to opcode 81, except that
+ * the immediate byte is sign extended to a word length.
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_byte_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x83
+****************************************************************************/
+void x86emuOp_opc83_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction Similar to opcode 81, except that
+ * the immediate byte is sign extended to a word length.
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod,rl);
+
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ destval = fetch_data_long(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ destval = fetch_data_word(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 destval,imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_long_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ } else {
+ u16 *destreg;
+ u16 destval,imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*genop_word_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x84
+****************************************************************************/
+void x86emuOp_test_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(destval, *srcreg);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(*destreg, *srcreg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x85
+****************************************************************************/
+void x86emuOp_test_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(destval, *srcreg);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(*destreg, *srcreg);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x86
+****************************************************************************/
+void x86emuOp_xchg_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+ u8 tmp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XCHG\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x87
+****************************************************************************/
+void x86emuOp_xchg_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XCHG\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ u32 destval,tmp;
+
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_long(destoffset, destval);
+ } else {
+ u16 *srcreg;
+ u16 destval,tmp;
+
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 tmp;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ } else {
+ u16 *destreg,*srcreg;
+ u16 tmp;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x88
+****************************************************************************/
+void x86emuOp_mov_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, *srcreg);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x89
+****************************************************************************/
+void x86emuOp_mov_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_long(destoffset, *srcreg);
+ } else {
+ u16 *srcreg;
+
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_word(destoffset, *srcreg);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8a
+****************************************************************************/
+void x86emuOp_mov_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8b
+****************************************************************************/
+void x86emuOp_mov_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg, *srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ } else {
+ u16 *destreg, *srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8c
+****************************************************************************/
+void x86emuOp_mov_word_RM_SR(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *destreg, *srcreg;
+ uint destoffset;
+ u16 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = *srcreg;
+ store_data_word(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8d
+****************************************************************************/
+void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *srcreg;
+ uint destoffset;
+
+/*
+ * TODO: Need to handle address size prefix!
+ *
+ * lea eax,[eax+ebx*2] ??
+ */
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LEA\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *srcreg = (u16)destoffset;
+ }
+ /* } else { undefined. Do nothing. } */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8e
+****************************************************************************/
+void x86emuOp_mov_word_SR_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *destreg, *srcreg;
+ uint srcoffset;
+ u16 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else { /* register to register */
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ /*
+ * Clean up, and reset all the R_xSP pointers to the correct
+ * locations. This is about 3x too much overhead (doing all the
+ * segreg ptrs when only one is needed, but this instruction
+ * *cannot* be that common, and this isn't too much work anyway.
+ */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8f
+****************************************************************************/
+void x86emuOp_pop_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ HALT_SYS();
+ }
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_long();
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_word();
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = pop_long();
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = pop_word();
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x90
+****************************************************************************/
+void x86emuOp_nop(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("NOP\n");
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x91-0x97
+****************************************************************************/
+void x86emuOp_xchg_word_AX_register(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ op1 &= 0x7;
+
+ START_OF_INSTR();
+
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg32;
+ DECODE_PRINTF("XCHG\tEAX,");
+ reg32 = DECODE_RM_LONG_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = *reg32;
+ *reg32 = tmp;
+ } else {
+ u16 *reg16;
+ DECODE_PRINTF("XCHG\tAX,");
+ reg16 = DECODE_RM_WORD_REGISTER(op1);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = M.x86.R_AX;
+ M.x86.R_EAX = *reg16;
+ *reg16 = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x98
+****************************************************************************/
+void x86emuOp_cbw(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CWDE\n");
+ } else {
+ DECODE_PRINTF("CBW\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ if (M.x86.R_AX & 0x8000) {
+ M.x86.R_EAX |= 0xffff0000;
+ } else {
+ M.x86.R_EAX &= 0x0000ffff;
+ }
+ } else {
+ if (M.x86.R_AL & 0x80) {
+ M.x86.R_AH = 0xff;
+ } else {
+ M.x86.R_AH = 0x0;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x99
+****************************************************************************/
+void x86emuOp_cwd(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CDQ\n");
+ } else {
+ DECODE_PRINTF("CWD\n");
+ }
+ DECODE_PRINTF("CWD\n");
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ if (M.x86.R_EAX & 0x80000000) {
+ M.x86.R_EDX = 0xffffffff;
+ } else {
+ M.x86.R_EDX = 0x0;
+ }
+ } else {
+ if (M.x86.R_AX & 0x8000) {
+ M.x86.R_DX = 0xffff;
+ } else {
+ M.x86.R_DX = 0x0;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9a
+****************************************************************************/
+void x86emuOp_call_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 farseg, faroff;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CALL\t");
+ faroff = fetch_word_imm();
+ farseg = fetch_word_imm();
+ DECODE_PRINTF2("%04x:", farseg);
+ DECODE_PRINTF2("%04x\n", faroff);
+ CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, farseg, faroff, "FAR ");
+
+ /* XXX
+ *
+ * Hooked interrupt vectors calling into our "BIOS" will cause
+ * problems unless all intersegment stuff is checked for BIOS
+ * access. Check needed here. For moment, let it alone.
+ */
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = farseg;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = faroff;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9b
+****************************************************************************/
+void x86emuOp_wait(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("WAIT");
+ TRACE_AND_STEP();
+ /* NADA. */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9c
+****************************************************************************/
+void x86emuOp_pushf_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 flags;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSHFD\n");
+ } else {
+ DECODE_PRINTF("PUSHF\n");
+ }
+ TRACE_AND_STEP();
+
+ /* clear out *all* bits not representing flags, and turn on real bits */
+ flags = (M.x86.R_EFLG & F_MSK) | F_ALWAYS_ON;
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(flags);
+ } else {
+ push_word((u16)flags);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9d
+****************************************************************************/
+void x86emuOp_popf_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POPFD\n");
+ } else {
+ DECODE_PRINTF("POPF\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EFLG = pop_long();
+ } else {
+ M.x86.R_FLG = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9e
+****************************************************************************/
+void x86emuOp_sahf(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("SAHF\n");
+ TRACE_AND_STEP();
+ /* clear the lower bits of the flag register */
+ M.x86.R_FLG &= 0xffffff00;
+ /* or in the AH register into the flags register */
+ M.x86.R_FLG |= M.x86.R_AH;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9f
+****************************************************************************/
+void x86emuOp_lahf(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LAHF\n");
+ TRACE_AND_STEP();
+ M.x86.R_AH = (u8)(M.x86.R_FLG & 0xff);
+ /*undocumented TC++ behavior??? Nope. It's documented, but
+ you have too look real hard to notice it. */
+ M.x86.R_AH |= 0x2;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa0
+****************************************************************************/
+void x86emuOp_mov_AL_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tAL,");
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x]\n", offset);
+ TRACE_AND_STEP();
+ M.x86.R_AL = fetch_data_byte(offset);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa1
+****************************************************************************/
+void x86emuOp_mov_AX_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ offset = fetch_word_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("MOV\tEAX,[%04x]\n", offset);
+ } else {
+ DECODE_PRINTF2("MOV\tAX,[%04x]\n", offset);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = fetch_data_long(offset);
+ } else {
+ M.x86.R_AX = fetch_data_word(offset);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa2
+****************************************************************************/
+void x86emuOp_mov_M_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x],AL\n", offset);
+ TRACE_AND_STEP();
+ store_data_byte(offset, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa3
+****************************************************************************/
+void x86emuOp_mov_M_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ offset = fetch_word_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("MOV\t[%04x],EAX\n", offset);
+ } else {
+ DECODE_PRINTF2("MOV\t[%04x],AX\n", offset);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ store_data_long(offset, M.x86.R_EAX);
+ } else {
+ store_data_word(offset, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa4
+****************************************************************************/
+void x86emuOp_movs_byte(u8 X86EMU_UNUSED(op1))
+{
+ u8 val;
+ u32 count;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVS\tBYTE\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ val = fetch_data_byte(M.x86.R_SI);
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, val);
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa5
+****************************************************************************/
+void x86emuOp_movs_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 val;
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOVS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("MOVS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long(M.x86.R_SI);
+ store_data_long_abs(M.x86.R_ES, M.x86.R_DI, val);
+ } else {
+ val = fetch_data_word(M.x86.R_SI);
+ store_data_word_abs(M.x86.R_ES, M.x86.R_DI, (u16)val);
+ }
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa6
+****************************************************************************/
+void x86emuOp_cmps_byte(u8 X86EMU_UNUSED(op1))
+{
+ s8 val1, val2;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMPS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val1 = fetch_data_byte(M.x86.R_SI);
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(val1, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && (ACCESS_FLAG(F_ZF) == 0) ) break;
+ if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ val1 = fetch_data_byte(M.x86.R_SI);
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(val1, val2);
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa7
+****************************************************************************/
+void x86emuOp_cmps_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 val1,val2;
+ int inc;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CMPS\tDWORD\n");
+ inc = 4;
+ } else {
+ DECODE_PRINTF("CMPS\tWORD\n");
+ inc = 2;
+ }
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -inc;
+
+ TRACE_AND_STEP();
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val1 = fetch_data_long(M.x86.R_SI);
+ val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(val1, val2);
+ } else {
+ val1 = fetch_data_word(M.x86.R_SI);
+ val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word((u16)val1, (u16)val2);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if ( (M.x86.mode & SYSMODE_PREFIX_REPE) && ACCESS_FLAG(F_ZF) == 0 ) break;
+ if ( (M.x86.mode & SYSMODE_PREFIX_REPNE) && ACCESS_FLAG(F_ZF) ) break;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val1 = fetch_data_long(M.x86.R_SI);
+ val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(val1, val2);
+ } else {
+ val1 = fetch_data_word(M.x86.R_SI);
+ val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word((u16)val1, (u16)val2);
+ }
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa8
+****************************************************************************/
+void x86emuOp_test_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\tAL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%04x\n", imm);
+ TRACE_AND_STEP();
+ test_byte(M.x86.R_AL, (u8)imm);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa9
+****************************************************************************/
+void x86emuOp_test_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("TEST\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("TEST\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ test_long(M.x86.R_EAX, srcval);
+ } else {
+ test_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaa
+****************************************************************************/
+void x86emuOp_stos_byte(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("STOS\tBYTE\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ TRACE_AND_STEP();
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xab
+****************************************************************************/
+void x86emuOp_stos_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("STOS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("STOS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ store_data_long_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_EAX);
+ } else {
+ store_data_word_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AX);
+ }
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xac
+****************************************************************************/
+void x86emuOp_lods_byte(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LODS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+ M.x86.R_SI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xad
+****************************************************************************/
+void x86emuOp_lods_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("LODS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("LODS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = fetch_data_long(M.x86.R_SI);
+ } else {
+ M.x86.R_AX = fetch_data_word(M.x86.R_SI);
+ }
+ M.x86.R_SI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xae
+****************************************************************************/
+void x86emuOp_scas_byte(u8 X86EMU_UNUSED(op1))
+{
+ s8 val2;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SCAS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaf
+****************************************************************************/
+void x86emuOp_scas_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 val;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("SCAS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("SCAS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb0 - 0xb7
+****************************************************************************/
+void x86emuOp_mov_byte_register_IMM(u8 op1)
+{
+ u8 imm, *ptr;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ ptr = DECODE_RM_BYTE_REGISTER(op1 & 0x7);
+ DECODE_PRINTF(",");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ *ptr = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb8 - 0xbf
+****************************************************************************/
+void x86emuOp_mov_word_register_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ op1 &= 0x7;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *reg32;
+ reg32 = DECODE_RM_LONG_REGISTER(op1);
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", srcval);
+ TRACE_AND_STEP();
+ *reg32 = srcval;
+ } else {
+ u16 *reg16;
+ reg16 = DECODE_RM_WORD_REGISTER(op1);
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", srcval);
+ TRACE_AND_STEP();
+ *reg16 = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc0
+****************************************************************************/
+void x86emuOp_opcC0_byte_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+ *destreg = destval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc1
+****************************************************************************/
+void x86emuOp_opcC1_word_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc2
+****************************************************************************/
+void x86emuOp_ret_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("RET\t");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_SP += imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc3
+****************************************************************************/
+void x86emuOp_ret_near(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("RET\n");
+ RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc4
+****************************************************************************/
+void x86emuOp_les_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LES\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_ES = fetch_data_word(srcoffset + 2);
+ }
+ /* else UNDEFINED! register to register */
+
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc5
+****************************************************************************/
+void x86emuOp_lds_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LDS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_DS = fetch_data_word(srcoffset + 2);
+ }
+ /* else UNDEFINED! */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc6
+****************************************************************************/
+void x86emuOp_mov_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE c6\n");
+ HALT_SYS();
+ }
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, imm);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc7
+****************************************************************************/
+void x86emuOp_mov_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ HALT_SYS();
+ }
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_long(destoffset, imm);
+ } else {
+ u16 imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_word(destoffset, imm);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ } else {
+ u16 *destreg;
+ u16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc8
+****************************************************************************/
+void x86emuOp_enter(u8 X86EMU_UNUSED(op1))
+{
+ u16 local,frame_pointer;
+ u8 nesting;
+ int i;
+
+ START_OF_INSTR();
+ local = fetch_word_imm();
+ nesting = fetch_byte_imm();
+ DECODE_PRINTF2("ENTER %x\n", local);
+ DECODE_PRINTF2(",%x\n", nesting);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_BP);
+ frame_pointer = M.x86.R_SP;
+ if (nesting > 0) {
+ for (i = 1; i < nesting; i++) {
+ M.x86.R_BP -= 2;
+ push_word(fetch_data_word_abs(M.x86.R_SS, M.x86.R_BP));
+ }
+ push_word(frame_pointer);
+ }
+ M.x86.R_BP = frame_pointer;
+ M.x86.R_SP = (u16)(M.x86.R_SP - local);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc9
+****************************************************************************/
+void x86emuOp_leave(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LEAVE\n");
+ TRACE_AND_STEP();
+ M.x86.R_SP = M.x86.R_BP;
+ M.x86.R_BP = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xca
+****************************************************************************/
+void x86emuOp_ret_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("RETF\t");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ M.x86.R_SP += imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcb
+****************************************************************************/
+void x86emuOp_ret_far(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("RETF\n");
+ RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcc
+****************************************************************************/
+void x86emuOp_int3(u8 X86EMU_UNUSED(op1))
+{
+ u16 tmp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("INT 3\n");
+ tmp = (u16) mem_access_word(3 * 4 + 2);
+ /* access the segment register */
+ TRACE_AND_STEP();
+ if (_X86EMU_intrTab[3]) {
+ (*_X86EMU_intrTab[3])(3);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(3 * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(3 * 4);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcd
+****************************************************************************/
+void x86emuOp_int_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 tmp;
+ u8 intnum;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("INT\t");
+ intnum = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", intnum);
+ tmp = mem_access_word(intnum * 4 + 2);
+ TRACE_AND_STEP();
+ if (_X86EMU_intrTab[intnum]) {
+ (*_X86EMU_intrTab[intnum])(intnum);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(intnum * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(intnum * 4);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xce
+****************************************************************************/
+void x86emuOp_into(u8 X86EMU_UNUSED(op1))
+{
+ u16 tmp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("INTO\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_OF)) {
+ tmp = mem_access_word(4 * 4 + 2);
+ if (_X86EMU_intrTab[4]) {
+ (*_X86EMU_intrTab[4])(4);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(4 * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(4 * 4);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcf
+****************************************************************************/
+void x86emuOp_iret(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("IRET\n");
+
+ TRACE_AND_STEP();
+
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ M.x86.R_FLG = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd0
+****************************************************************************/
+void x86emuOp_opcD0_byte_RM_1(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, 1);
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd1
+****************************************************************************/
+void x86emuOp_opcD1_word_RM_1(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, 1);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, 1);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ } else {
+ u16 destval;
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd2
+****************************************************************************/
+void x86emuOp_opcD2_byte_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ amt = M.x86.R_CL;
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+ *destreg = destval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd3
+****************************************************************************/
+void x86emuOp_opcD3_word_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ amt = M.x86.R_CL;
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd4
+****************************************************************************/
+void x86emuOp_aam(u8 X86EMU_UNUSED(op1))
+{
+ u8 a;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AAM\n");
+ a = fetch_byte_imm(); /* this is a stupid encoding. */
+ if (a != 10) {
+ DECODE_PRINTF("ERROR DECODING AAM\n");
+ TRACE_REGS();
+ HALT_SYS();
+ }
+ TRACE_AND_STEP();
+ /* note the type change here --- returning AL and AH in AX. */
+ M.x86.R_AX = aam_word(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd5
+****************************************************************************/
+void x86emuOp_aad(u8 X86EMU_UNUSED(op1))
+{
+ u8 a;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AAD\n");
+ a = fetch_byte_imm();
+ TRACE_AND_STEP();
+ M.x86.R_AX = aad_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* opcode 0xd6 ILLEGAL OPCODE */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd7
+****************************************************************************/
+void x86emuOp_xlat(u8 X86EMU_UNUSED(op1))
+{
+ u16 addr;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XLAT\n");
+ TRACE_AND_STEP();
+ addr = (u16)(M.x86.R_BX + (u8)M.x86.R_AL);
+ M.x86.R_AL = fetch_data_byte(addr);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* instuctions D8 .. DF are in i87_ops.c */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe0
+****************************************************************************/
+void x86emuOp_loopne(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOPNE\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0 && !ACCESS_FLAG(F_ZF)) /* CX != 0 and !ZF */
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe1
+****************************************************************************/
+void x86emuOp_loope(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOPE\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0 && ACCESS_FLAG(F_ZF)) /* CX != 0 and ZF */
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe2
+****************************************************************************/
+void x86emuOp_loop(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOP\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0)
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe3
+****************************************************************************/
+void x86emuOp_jcxz(u8 X86EMU_UNUSED(op1))
+{
+ u16 target;
+ s8 offset;
+
+ /* jump to byte offset if overflow flag is set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JCXZ\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (M.x86.R_CX == 0)
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe4
+****************************************************************************/
+void x86emuOp_in_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\t");
+ port = (u8) fetch_byte_imm();
+ DECODE_PRINTF2("%x,AL\n", port);
+ TRACE_AND_STEP();
+ M.x86.R_AL = (*sys_inb)(port);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe5
+****************************************************************************/
+void x86emuOp_in_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\t");
+ port = (u8) fetch_byte_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("EAX,%x\n", port);
+ } else {
+ DECODE_PRINTF2("AX,%x\n", port);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = (*sys_inl)(port);
+ } else {
+ M.x86.R_AX = (*sys_inw)(port);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe6
+****************************************************************************/
+void x86emuOp_out_byte_IMM_AL(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\t");
+ port = (u8) fetch_byte_imm();
+ DECODE_PRINTF2("%x,AL\n", port);
+ TRACE_AND_STEP();
+ (*sys_outb)(port, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe7
+****************************************************************************/
+void x86emuOp_out_word_IMM_AX(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\t");
+ port = (u8) fetch_byte_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("%x,EAX\n", port);
+ } else {
+ DECODE_PRINTF2("%x,AX\n", port);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ (*sys_outl)(port, M.x86.R_EAX);
+ } else {
+ (*sys_outw)(port, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe8
+****************************************************************************/
+void x86emuOp_call_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CALL\t");
+ ip = (s16) fetch_word_imm();
+ ip += (s16) M.x86.R_IP; /* CHECK SIGN */
+ DECODE_PRINTF2("%04x\n", ip);
+ CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, "");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe9
+****************************************************************************/
+void x86emuOp_jump_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\t");
+ ip = (s16)fetch_word_imm();
+ ip += (s16)M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = (u16)ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xea
+****************************************************************************/
+void x86emuOp_jump_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 cs, ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\tFAR ");
+ ip = fetch_word_imm();
+ cs = fetch_word_imm();
+ DECODE_PRINTF2("%04x:", cs);
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = ip;
+ M.x86.R_CS = cs;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xeb
+****************************************************************************/
+void x86emuOp_jump_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 target;
+ s8 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xec
+****************************************************************************/
+void x86emuOp_in_byte_AL_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\tAL,DX\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = (*sys_inb)(M.x86.R_DX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xed
+****************************************************************************/
+void x86emuOp_in_word_AX_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("IN\tEAX,DX\n");
+ } else {
+ DECODE_PRINTF("IN\tAX,DX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = (*sys_inl)(M.x86.R_DX);
+ } else {
+ M.x86.R_AX = (*sys_inw)(M.x86.R_DX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xee
+****************************************************************************/
+void x86emuOp_out_byte_DX_AL(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\tDX,AL\n");
+ TRACE_AND_STEP();
+ (*sys_outb)(M.x86.R_DX, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xef
+****************************************************************************/
+void x86emuOp_out_word_DX_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("OUT\tDX,EAX\n");
+ } else {
+ DECODE_PRINTF("OUT\tDX,AX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ (*sys_outl)(M.x86.R_DX, M.x86.R_EAX);
+ } else {
+ (*sys_outw)(M.x86.R_DX, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf0
+****************************************************************************/
+void x86emuOp_lock(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LOCK:\n");
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/*opcode 0xf1 ILLEGAL OPERATION */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf2
+****************************************************************************/
+void x86emuOp_repne(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("REPNE\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_REPNE;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf3
+****************************************************************************/
+void x86emuOp_repe(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("REPE\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_REPE;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf4
+****************************************************************************/
+void x86emuOp_halt(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("HALT\n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf5
+****************************************************************************/
+void x86emuOp_cmc(u8 X86EMU_UNUSED(op1))
+{
+ /* complement the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CMC\n");
+ TRACE_AND_STEP();
+ TOGGLE_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf6
+****************************************************************************/
+void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval, srcval;
+
+ /* long, drawn out code follows. Double switch for a total
+ of 32 cases. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTF(opF6_names[rh]);
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ destval = fetch_data_byte(destoffset);
+
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ TRACE_AND_STEP();
+ test_byte(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = not_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = neg_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_byte(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_byte(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_byte(destval);
+ break;
+ default:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_byte(destval);
+ break;
+ }
+ } else { /* mod=11 */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ TRACE_AND_STEP();
+ test_byte(*destreg, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_byte(*destreg);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_byte(*destreg);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_byte(*destreg); /*!!! */
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_byte(*destreg);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_byte(*destreg);
+ break;
+ default:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_byte(*destreg);
+ break;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf7
+****************************************************************************/
+void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ DECODE_PRINTF(opF6_names[rh]);
+ if (mod < 3) {
+
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval, srcval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ destval = fetch_data_long(destoffset);
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_long(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = not_long(destval);
+ store_data_long(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = neg_long(destval);
+ store_data_long(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_long(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_long(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_long(destval);
+ break;
+ case 7:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_long(destval);
+ break;
+ }
+ } else {
+ u16 destval, srcval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ destval = fetch_data_word(destoffset);
+
+ switch (rh) {
+ case 0: /* test word imm */
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_word(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = not_word(destval);
+ store_data_word(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = neg_word(destval);
+ store_data_word(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_word(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_word(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_word(destval);
+ break;
+ case 7:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_word(destval);
+ break;
+ }
+ }
+
+ } else { /* mod=11 */
+
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+
+ switch (rh) {
+ case 0: /* test word imm */
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_long(*destreg, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_long(*destreg);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_long(*destreg);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_long(*destreg); /*!!! */
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_long(*destreg);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_long(*destreg);
+ break;
+ case 7:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_long(*destreg);
+ break;
+ }
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+
+ switch (rh) {
+ case 0: /* test word imm */
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_word(*destreg, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_word(*destreg);
+ break;
+ case 3:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_word(*destreg);
+ break;
+ case 4:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_word(*destreg); /*!!! */
+ break;
+ case 5:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_word(*destreg);
+ break;
+ case 6:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_word(*destreg);
+ break;
+ case 7:
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_word(*destreg);
+ break;
+ }
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf8
+****************************************************************************/
+void x86emuOp_clc(u8 X86EMU_UNUSED(op1))
+{
+ /* clear the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLC\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf9
+****************************************************************************/
+void x86emuOp_stc(u8 X86EMU_UNUSED(op1))
+{
+ /* set the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STC\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfa
+****************************************************************************/
+void x86emuOp_cli(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLI\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_IF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfb
+****************************************************************************/
+void x86emuOp_sti(u8 X86EMU_UNUSED(op1))
+{
+ /* enable interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STI\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_IF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfc
+****************************************************************************/
+void x86emuOp_cld(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLD\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_DF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfd
+****************************************************************************/
+void x86emuOp_std(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STD\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_DF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfe
+****************************************************************************/
+void x86emuOp_opcFE_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u8 destval;
+ uint destoffset;
+ u8 *destreg;
+
+ /* Yet another special case instruction. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("INC\t");
+ break;
+ case 1:
+ DECODE_PRINTF("DEC\t");
+ break;
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ DECODE_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x \n", mod);
+ HALT_SYS();
+ break;
+ }
+ }
+#endif
+ if (mod < 3) {
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ if (rh == 0)
+ destval = inc_byte(destval);
+ else
+ destval = dec_byte(destval);
+ store_data_byte(destoffset, destval);
+ } else {
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ if (rh == 0)
+ *destreg = inc_byte(*destreg);
+ else
+ *destreg = dec_byte(*destreg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xff
+****************************************************************************/
+void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ uint destoffset = 0;
+ u16 *destreg;
+ u16 destval,destval2;
+
+ /* Yet another special case instruction. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tDWORD PTR ");
+ } else {
+ DECODE_PRINTF("INC\tWORD PTR ");
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tDWORD PTR ");
+ } else {
+ DECODE_PRINTF("DEC\tWORD PTR ");
+ }
+ break;
+ case 2:
+ DECODE_PRINTF("CALL\t ");
+ break;
+ case 3:
+ DECODE_PRINTF("CALL\tFAR ");
+ break;
+ case 4:
+ DECODE_PRINTF("JMP\t");
+ break;
+ case 5:
+ DECODE_PRINTF("JMP\tFAR ");
+ break;
+ case 6:
+ DECODE_PRINTF("PUSH\t");
+ break;
+ case 7:
+ DECODE_PRINTF("ILLEGAL DECODING OF OPCODE FF\t");
+ HALT_SYS();
+ break;
+ }
+ }
+#endif
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0: /* inc word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1: /* dec word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 3: /* call far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = destval2;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 4: /* jmp word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ break;
+ case 5: /* jmp far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ M.x86.R_CS = destval2;
+ break;
+ case 6: /* push word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ push_long(destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(destval);
+ }
+ break;
+ }
+ } else {
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = inc_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = inc_word(*destreg);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = dec_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = dec_word(*destreg);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = *destreg;
+ break;
+ case 3: /* jmp far ptr ... */
+ DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ break;
+
+ case 4: /* jmp ... */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ M.x86.R_IP = (u16) (*destreg);
+ break;
+ case 5: /* jmp far ptr ... */
+ DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_word(*destreg);
+ }
+ break;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/***************************************************************************
+ * Single byte operation code table:
+ **************************************************************************/
+void (*x86emu_optab[256])(u8) =
+{
+/* 0x00 */ x86emuOp_genop_byte_RM_R,
+/* 0x01 */ x86emuOp_genop_word_RM_R,
+/* 0x02 */ x86emuOp_genop_byte_R_RM,
+/* 0x03 */ x86emuOp_genop_word_R_RM,
+/* 0x04 */ x86emuOp_genop_byte_AL_IMM,
+/* 0x05 */ x86emuOp_genop_word_AX_IMM,
+/* 0x06 */ x86emuOp_push_ES,
+/* 0x07 */ x86emuOp_pop_ES,
+
+/* 0x08 */ x86emuOp_genop_byte_RM_R,
+/* 0x09 */ x86emuOp_genop_word_RM_R,
+/* 0x0a */ x86emuOp_genop_byte_R_RM,
+/* 0x0b */ x86emuOp_genop_word_R_RM,
+/* 0x0c */ x86emuOp_genop_byte_AL_IMM,
+/* 0x0d */ x86emuOp_genop_word_AX_IMM,
+/* 0x0e */ x86emuOp_push_CS,
+/* 0x0f */ x86emuOp_two_byte,
+
+/* 0x10 */ x86emuOp_genop_byte_RM_R,
+/* 0x11 */ x86emuOp_genop_word_RM_R,
+/* 0x12 */ x86emuOp_genop_byte_R_RM,
+/* 0x13 */ x86emuOp_genop_word_R_RM,
+/* 0x14 */ x86emuOp_genop_byte_AL_IMM,
+/* 0x15 */ x86emuOp_genop_word_AX_IMM,
+/* 0x16 */ x86emuOp_push_SS,
+/* 0x17 */ x86emuOp_pop_SS,
+
+/* 0x18 */ x86emuOp_genop_byte_RM_R,
+/* 0x19 */ x86emuOp_genop_word_RM_R,
+/* 0x1a */ x86emuOp_genop_byte_R_RM,
+/* 0x1b */ x86emuOp_genop_word_R_RM,
+/* 0x1c */ x86emuOp_genop_byte_AL_IMM,
+/* 0x1d */ x86emuOp_genop_word_AX_IMM,
+/* 0x1e */ x86emuOp_push_DS,
+/* 0x1f */ x86emuOp_pop_DS,
+
+/* 0x20 */ x86emuOp_genop_byte_RM_R,
+/* 0x21 */ x86emuOp_genop_word_RM_R,
+/* 0x22 */ x86emuOp_genop_byte_R_RM,
+/* 0x23 */ x86emuOp_genop_word_R_RM,
+/* 0x24 */ x86emuOp_genop_byte_AL_IMM,
+/* 0x25 */ x86emuOp_genop_word_AX_IMM,
+/* 0x26 */ x86emuOp_segovr_ES,
+/* 0x27 */ x86emuOp_daa,
+
+/* 0x28 */ x86emuOp_genop_byte_RM_R,
+/* 0x29 */ x86emuOp_genop_word_RM_R,
+/* 0x2a */ x86emuOp_genop_byte_R_RM,
+/* 0x2b */ x86emuOp_genop_word_R_RM,
+/* 0x2c */ x86emuOp_genop_byte_AL_IMM,
+/* 0x2d */ x86emuOp_genop_word_AX_IMM,
+/* 0x2e */ x86emuOp_segovr_CS,
+/* 0x2f */ x86emuOp_das,
+
+/* 0x30 */ x86emuOp_genop_byte_RM_R,
+/* 0x31 */ x86emuOp_genop_word_RM_R,
+/* 0x32 */ x86emuOp_genop_byte_R_RM,
+/* 0x33 */ x86emuOp_genop_word_R_RM,
+/* 0x34 */ x86emuOp_genop_byte_AL_IMM,
+/* 0x35 */ x86emuOp_genop_word_AX_IMM,
+/* 0x36 */ x86emuOp_segovr_SS,
+/* 0x37 */ x86emuOp_aaa,
+
+/* 0x38 */ x86emuOp_genop_byte_RM_R,
+/* 0x39 */ x86emuOp_genop_word_RM_R,
+/* 0x3a */ x86emuOp_genop_byte_R_RM,
+/* 0x3b */ x86emuOp_genop_word_R_RM,
+/* 0x3c */ x86emuOp_genop_byte_AL_IMM,
+/* 0x3d */ x86emuOp_genop_word_AX_IMM,
+/* 0x3e */ x86emuOp_segovr_DS,
+/* 0x3f */ x86emuOp_aas,
+
+/* 0x40 */ x86emuOp_inc_register,
+/* 0x41 */ x86emuOp_inc_register,
+/* 0x42 */ x86emuOp_inc_register,
+/* 0x43 */ x86emuOp_inc_register,
+/* 0x44 */ x86emuOp_inc_register,
+/* 0x45 */ x86emuOp_inc_register,
+/* 0x46 */ x86emuOp_inc_register,
+/* 0x47 */ x86emuOp_inc_register,
+
+/* 0x48 */ x86emuOp_dec_register,
+/* 0x49 */ x86emuOp_dec_register,
+/* 0x4a */ x86emuOp_dec_register,
+/* 0x4b */ x86emuOp_dec_register,
+/* 0x4c */ x86emuOp_dec_register,
+/* 0x4d */ x86emuOp_dec_register,
+/* 0x4e */ x86emuOp_dec_register,
+/* 0x4f */ x86emuOp_dec_register,
+
+/* 0x50 */ x86emuOp_push_register,
+/* 0x51 */ x86emuOp_push_register,
+/* 0x52 */ x86emuOp_push_register,
+/* 0x53 */ x86emuOp_push_register,
+/* 0x54 */ x86emuOp_push_register,
+/* 0x55 */ x86emuOp_push_register,
+/* 0x56 */ x86emuOp_push_register,
+/* 0x57 */ x86emuOp_push_register,
+
+/* 0x58 */ x86emuOp_pop_register,
+/* 0x59 */ x86emuOp_pop_register,
+/* 0x5a */ x86emuOp_pop_register,
+/* 0x5b */ x86emuOp_pop_register,
+/* 0x5c */ x86emuOp_pop_register,
+/* 0x5d */ x86emuOp_pop_register,
+/* 0x5e */ x86emuOp_pop_register,
+/* 0x5f */ x86emuOp_pop_register,
+
+/* 0x60 */ x86emuOp_push_all,
+/* 0x61 */ x86emuOp_pop_all,
+/* 0x62 */ x86emuOp_illegal_op, /* bound */
+/* 0x63 */ x86emuOp_illegal_op, /* arpl */
+/* 0x64 */ x86emuOp_segovr_FS,
+/* 0x65 */ x86emuOp_segovr_GS,
+/* 0x66 */ x86emuOp_prefix_data,
+/* 0x67 */ x86emuOp_prefix_addr,
+
+/* 0x68 */ x86emuOp_push_word_IMM,
+/* 0x69 */ x86emuOp_imul_word_IMM,
+/* 0x6a */ x86emuOp_push_byte_IMM,
+/* 0x6b */ x86emuOp_imul_byte_IMM,
+/* 0x6c */ x86emuOp_ins_byte,
+/* 0x6d */ x86emuOp_ins_word,
+/* 0x6e */ x86emuOp_outs_byte,
+/* 0x6f */ x86emuOp_outs_word,
+
+/* 0x70 */ x86emuOp_jump_near_cond,
+/* 0x71 */ x86emuOp_jump_near_cond,
+/* 0x72 */ x86emuOp_jump_near_cond,
+/* 0x73 */ x86emuOp_jump_near_cond,
+/* 0x74 */ x86emuOp_jump_near_cond,
+/* 0x75 */ x86emuOp_jump_near_cond,
+/* 0x76 */ x86emuOp_jump_near_cond,
+/* 0x77 */ x86emuOp_jump_near_cond,
+
+/* 0x78 */ x86emuOp_jump_near_cond,
+/* 0x79 */ x86emuOp_jump_near_cond,
+/* 0x7a */ x86emuOp_jump_near_cond,
+/* 0x7b */ x86emuOp_jump_near_cond,
+/* 0x7c */ x86emuOp_jump_near_cond,
+/* 0x7d */ x86emuOp_jump_near_cond,
+/* 0x7e */ x86emuOp_jump_near_cond,
+/* 0x7f */ x86emuOp_jump_near_cond,
+
+/* 0x80 */ x86emuOp_opc80_byte_RM_IMM,
+/* 0x81 */ x86emuOp_opc81_word_RM_IMM,
+/* 0x82 */ x86emuOp_opc82_byte_RM_IMM,
+/* 0x83 */ x86emuOp_opc83_word_RM_IMM,
+/* 0x84 */ x86emuOp_test_byte_RM_R,
+/* 0x85 */ x86emuOp_test_word_RM_R,
+/* 0x86 */ x86emuOp_xchg_byte_RM_R,
+/* 0x87 */ x86emuOp_xchg_word_RM_R,
+
+/* 0x88 */ x86emuOp_mov_byte_RM_R,
+/* 0x89 */ x86emuOp_mov_word_RM_R,
+/* 0x8a */ x86emuOp_mov_byte_R_RM,
+/* 0x8b */ x86emuOp_mov_word_R_RM,
+/* 0x8c */ x86emuOp_mov_word_RM_SR,
+/* 0x8d */ x86emuOp_lea_word_R_M,
+/* 0x8e */ x86emuOp_mov_word_SR_RM,
+/* 0x8f */ x86emuOp_pop_RM,
+
+/* 0x90 */ x86emuOp_nop,
+/* 0x91 */ x86emuOp_xchg_word_AX_register,
+/* 0x92 */ x86emuOp_xchg_word_AX_register,
+/* 0x93 */ x86emuOp_xchg_word_AX_register,
+/* 0x94 */ x86emuOp_xchg_word_AX_register,
+/* 0x95 */ x86emuOp_xchg_word_AX_register,
+/* 0x96 */ x86emuOp_xchg_word_AX_register,
+/* 0x97 */ x86emuOp_xchg_word_AX_register,
+
+/* 0x98 */ x86emuOp_cbw,
+/* 0x99 */ x86emuOp_cwd,
+/* 0x9a */ x86emuOp_call_far_IMM,
+/* 0x9b */ x86emuOp_wait,
+/* 0x9c */ x86emuOp_pushf_word,
+/* 0x9d */ x86emuOp_popf_word,
+/* 0x9e */ x86emuOp_sahf,
+/* 0x9f */ x86emuOp_lahf,
+
+/* 0xa0 */ x86emuOp_mov_AL_M_IMM,
+/* 0xa1 */ x86emuOp_mov_AX_M_IMM,
+/* 0xa2 */ x86emuOp_mov_M_AL_IMM,
+/* 0xa3 */ x86emuOp_mov_M_AX_IMM,
+/* 0xa4 */ x86emuOp_movs_byte,
+/* 0xa5 */ x86emuOp_movs_word,
+/* 0xa6 */ x86emuOp_cmps_byte,
+/* 0xa7 */ x86emuOp_cmps_word,
+/* 0xa8 */ x86emuOp_test_AL_IMM,
+/* 0xa9 */ x86emuOp_test_AX_IMM,
+/* 0xaa */ x86emuOp_stos_byte,
+/* 0xab */ x86emuOp_stos_word,
+/* 0xac */ x86emuOp_lods_byte,
+/* 0xad */ x86emuOp_lods_word,
+/* 0xac */ x86emuOp_scas_byte,
+/* 0xad */ x86emuOp_scas_word,
+
+/* 0xb0 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb1 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb2 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb3 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb4 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb5 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb6 */ x86emuOp_mov_byte_register_IMM,
+/* 0xb7 */ x86emuOp_mov_byte_register_IMM,
+
+/* 0xb8 */ x86emuOp_mov_word_register_IMM,
+/* 0xb9 */ x86emuOp_mov_word_register_IMM,
+/* 0xba */ x86emuOp_mov_word_register_IMM,
+/* 0xbb */ x86emuOp_mov_word_register_IMM,
+/* 0xbc */ x86emuOp_mov_word_register_IMM,
+/* 0xbd */ x86emuOp_mov_word_register_IMM,
+/* 0xbe */ x86emuOp_mov_word_register_IMM,
+/* 0xbf */ x86emuOp_mov_word_register_IMM,
+
+/* 0xc0 */ x86emuOp_opcC0_byte_RM_MEM,
+/* 0xc1 */ x86emuOp_opcC1_word_RM_MEM,
+/* 0xc2 */ x86emuOp_ret_near_IMM,
+/* 0xc3 */ x86emuOp_ret_near,
+/* 0xc4 */ x86emuOp_les_R_IMM,
+/* 0xc5 */ x86emuOp_lds_R_IMM,
+/* 0xc6 */ x86emuOp_mov_byte_RM_IMM,
+/* 0xc7 */ x86emuOp_mov_word_RM_IMM,
+/* 0xc8 */ x86emuOp_enter,
+/* 0xc9 */ x86emuOp_leave,
+/* 0xca */ x86emuOp_ret_far_IMM,
+/* 0xcb */ x86emuOp_ret_far,
+/* 0xcc */ x86emuOp_int3,
+/* 0xcd */ x86emuOp_int_IMM,
+/* 0xce */ x86emuOp_into,
+/* 0xcf */ x86emuOp_iret,
+
+/* 0xd0 */ x86emuOp_opcD0_byte_RM_1,
+/* 0xd1 */ x86emuOp_opcD1_word_RM_1,
+/* 0xd2 */ x86emuOp_opcD2_byte_RM_CL,
+/* 0xd3 */ x86emuOp_opcD3_word_RM_CL,
+/* 0xd4 */ x86emuOp_aam,
+/* 0xd5 */ x86emuOp_aad,
+/* 0xd6 */ x86emuOp_illegal_op, /* Undocumented SETALC instruction */
+/* 0xd7 */ x86emuOp_xlat,
+/* 0xd8 */ x86emuOp_esc_coprocess_d8,
+/* 0xd9 */ x86emuOp_esc_coprocess_d9,
+/* 0xda */ x86emuOp_esc_coprocess_da,
+/* 0xdb */ x86emuOp_esc_coprocess_db,
+/* 0xdc */ x86emuOp_esc_coprocess_dc,
+/* 0xdd */ x86emuOp_esc_coprocess_dd,
+/* 0xde */ x86emuOp_esc_coprocess_de,
+/* 0xdf */ x86emuOp_esc_coprocess_df,
+
+/* 0xe0 */ x86emuOp_loopne,
+/* 0xe1 */ x86emuOp_loope,
+/* 0xe2 */ x86emuOp_loop,
+/* 0xe3 */ x86emuOp_jcxz,
+/* 0xe4 */ x86emuOp_in_byte_AL_IMM,
+/* 0xe5 */ x86emuOp_in_word_AX_IMM,
+/* 0xe6 */ x86emuOp_out_byte_IMM_AL,
+/* 0xe7 */ x86emuOp_out_word_IMM_AX,
+
+/* 0xe8 */ x86emuOp_call_near_IMM,
+/* 0xe9 */ x86emuOp_jump_near_IMM,
+/* 0xea */ x86emuOp_jump_far_IMM,
+/* 0xeb */ x86emuOp_jump_byte_IMM,
+/* 0xec */ x86emuOp_in_byte_AL_DX,
+/* 0xed */ x86emuOp_in_word_AX_DX,
+/* 0xee */ x86emuOp_out_byte_DX_AL,
+/* 0xef */ x86emuOp_out_word_DX_AX,
+
+/* 0xf0 */ x86emuOp_lock,
+/* 0xf1 */ x86emuOp_illegal_op,
+/* 0xf2 */ x86emuOp_repne,
+/* 0xf3 */ x86emuOp_repe,
+/* 0xf4 */ x86emuOp_halt,
+/* 0xf5 */ x86emuOp_cmc,
+/* 0xf6 */ x86emuOp_opcF6_byte_RM,
+/* 0xf7 */ x86emuOp_opcF7_word_RM,
+
+/* 0xf8 */ x86emuOp_clc,
+/* 0xf9 */ x86emuOp_stc,
+/* 0xfa */ x86emuOp_cli,
+/* 0xfb */ x86emuOp_sti,
+/* 0xfc */ x86emuOp_cld,
+/* 0xfd */ x86emuOp_std,
+/* 0xfe */ x86emuOp_opcFE_byte_RM,
+/* 0xff */ x86emuOp_opcFF_word_RM,
+};
diff --git a/src/devices/emulator/x86emu/ops.h b/src/devices/emulator/x86emu/ops.h
new file mode 100644
index 0000000000..65ea676543
--- /dev/null
+++ b/src/devices/emulator/x86emu/ops.h
@@ -0,0 +1,45 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for operand decoding functions.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_OPS_H
+#define __X86EMU_OPS_H
+
+extern void (*x86emu_optab[0x100])(u8 op1);
+extern void (*x86emu_optab2[0x100])(u8 op2);
+
+#endif /* __X86EMU_OPS_H */
diff --git a/src/devices/emulator/x86emu/ops2.c b/src/devices/emulator/x86emu/ops2.c
new file mode 100644
index 0000000000..6afd36e2e9
--- /dev/null
+++ b/src/devices/emulator/x86emu/ops2.c
@@ -0,0 +1,1764 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file includes subroutines to implement the decoding
+* and emulation of all the x86 extended two-byte processor
+* instructions.
+*
+****************************************************************************/
+
+#include "x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+op1 - Instruction op code
+
+REMARKS:
+Handles illegal opcodes.
+****************************************************************************/
+void x86emuOp2_illegal_op(
+ u8 op2)
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+ TRACE_REGS();
+ printk("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n",
+ M.x86.R_CS, M.x86.R_IP-2,op2);
+ HALT_SYS();
+ END_OF_INSTR();
+}
+
+#define xorl(a,b) ((a) && !(b)) || (!(a) && (b))
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0x80-0x8F
+****************************************************************************/
+int x86emu_check_jump_condition(u8 op)
+{
+ switch (op) {
+ case 0x0:
+ DECODE_PRINTF("JO\t");
+ return ACCESS_FLAG(F_OF);
+ case 0x1:
+ DECODE_PRINTF("JNO\t");
+ return !ACCESS_FLAG(F_OF);
+ break;
+ case 0x2:
+ DECODE_PRINTF("JB\t");
+ return ACCESS_FLAG(F_CF);
+ break;
+ case 0x3:
+ DECODE_PRINTF("JNB\t");
+ return !ACCESS_FLAG(F_CF);
+ break;
+ case 0x4:
+ DECODE_PRINTF("JZ\t");
+ return ACCESS_FLAG(F_ZF);
+ break;
+ case 0x5:
+ DECODE_PRINTF("JNZ\t");
+ return !ACCESS_FLAG(F_ZF);
+ break;
+ case 0x6:
+ DECODE_PRINTF("JBE\t");
+ return ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF);
+ break;
+ case 0x7:
+ DECODE_PRINTF("JNBE\t");
+ return !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF));
+ break;
+ case 0x8:
+ DECODE_PRINTF("JS\t");
+ return ACCESS_FLAG(F_SF);
+ break;
+ case 0x9:
+ DECODE_PRINTF("JNS\t");
+ return !ACCESS_FLAG(F_SF);
+ break;
+ case 0xa:
+ DECODE_PRINTF("JP\t");
+ return ACCESS_FLAG(F_PF);
+ break;
+ case 0xb:
+ DECODE_PRINTF("JNP\t");
+ return !ACCESS_FLAG(F_PF);
+ break;
+ case 0xc:
+ DECODE_PRINTF("JL\t");
+ return xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+ break;
+ case 0xd:
+ DECODE_PRINTF("JNL\t");
+ return !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+ break;
+ case 0xe:
+ DECODE_PRINTF("JLE\t");
+ return (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+ ACCESS_FLAG(F_ZF));
+ break;
+ default:
+ DECODE_PRINTF("JNLE\t");
+ return !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+ ACCESS_FLAG(F_ZF));
+ }
+}
+
+void x86emuOp2_long_jump(u8 op2)
+{
+ s32 target;
+ int cond;
+
+ /* conditional jump to word offset. */
+ START_OF_INSTR();
+ cond = x86emu_check_jump_condition(op2 & 0xF);
+ target = (s16) fetch_word_imm();
+ target += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", target);
+ TRACE_AND_STEP();
+ if (cond)
+ M.x86.R_IP = (u16)target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0x90-0x9F
+****************************************************************************/
+void x86emuOp2_set_byte(u8 op2)
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 *destreg;
+ char *name = 0;
+ int cond = 0;
+
+ START_OF_INSTR();
+ switch (op2) {
+ case 0x90:
+ name = "SETO\t";
+ cond = ACCESS_FLAG(F_OF);
+ break;
+ case 0x91:
+ name = "SETNO\t";
+ cond = !ACCESS_FLAG(F_OF);
+ break;
+ case 0x92:
+ name = "SETB\t";
+ cond = ACCESS_FLAG(F_CF);
+ break;
+ case 0x93:
+ name = "SETNB\t";
+ cond = !ACCESS_FLAG(F_CF);
+ break;
+ case 0x94:
+ name = "SETZ\t";
+ cond = ACCESS_FLAG(F_ZF);
+ break;
+ case 0x95:
+ name = "SETNZ\t";
+ cond = !ACCESS_FLAG(F_ZF);
+ break;
+ case 0x96:
+ name = "SETBE\t";
+ cond = ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF);
+ break;
+ case 0x97:
+ name = "SETNBE\t";
+ cond = !(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF));
+ break;
+ case 0x98:
+ name = "SETS\t";
+ cond = ACCESS_FLAG(F_SF);
+ break;
+ case 0x99:
+ name = "SETNS\t";
+ cond = !ACCESS_FLAG(F_SF);
+ break;
+ case 0x9a:
+ name = "SETP\t";
+ cond = ACCESS_FLAG(F_PF);
+ break;
+ case 0x9b:
+ name = "SETNP\t";
+ cond = !ACCESS_FLAG(F_PF);
+ break;
+ case 0x9c:
+ name = "SETL\t";
+ cond = xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+ break;
+ case 0x9d:
+ name = "SETNL\t";
+ cond = !xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF));
+ break;
+ case 0x9e:
+ name = "SETLE\t";
+ cond = (xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+ ACCESS_FLAG(F_ZF));
+ break;
+ case 0x9f:
+ name = "SETNLE\t";
+ cond = !(xorl(ACCESS_FLAG(F_SF), ACCESS_FLAG(F_OF)) ||
+ ACCESS_FLAG(F_ZF));
+ break;
+ }
+ DECODE_PRINTF(name);
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, cond ? 0x01 : 0x00);
+ } else { /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ TRACE_AND_STEP();
+ *destreg = cond ? 0x01 : 0x00;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa0
+****************************************************************************/
+void x86emuOp2_push_FS(u8 X86EMU_UNUSED(op2))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tFS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_FS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa1
+****************************************************************************/
+void x86emuOp2_pop_FS(u8 X86EMU_UNUSED(op2))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tFS\n");
+ TRACE_AND_STEP();
+ M.x86.R_FS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa3
+****************************************************************************/
+void x86emuOp2_bt_R(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ int bit,disp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BT\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval;
+ u32 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ disp = (s16)*shiftreg >> 5;
+ srcval = fetch_data_long(srcoffset+disp);
+ CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF);
+ } else {
+ u16 srcval;
+ u16 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ disp = (s16)*shiftreg >> 4;
+ srcval = fetch_data_word(srcoffset+disp);
+ CONDITIONAL_SET_FLAG(srcval & (0x1 << bit),F_CF);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg,*shiftreg;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF);
+ } else {
+ u16 *srcreg,*shiftreg;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ CONDITIONAL_SET_FLAG(*srcreg & (0x1 << bit),F_CF);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa4
+****************************************************************************/
+void x86emuOp2_shld_IMM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 shift;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SHLD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ destval = fetch_data_long(destoffset);
+ destval = shld_long(destval,*shiftreg,shift);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ destval = fetch_data_word(destoffset);
+ destval = shld_word(destval,*shiftreg,shift);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ *destreg = shld_long(*destreg,*shiftreg,shift);
+ } else {
+ u16 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ *destreg = shld_word(*destreg,*shiftreg,shift);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa5
+****************************************************************************/
+void x86emuOp2_shld_CL(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SHLD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = fetch_data_long(destoffset);
+ destval = shld_long(destval,*shiftreg,M.x86.R_CL);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = fetch_data_word(destoffset);
+ destval = shld_word(destval,*shiftreg,M.x86.R_CL);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = shld_long(*destreg,*shiftreg,M.x86.R_CL);
+ } else {
+ u16 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = shld_word(*destreg,*shiftreg,M.x86.R_CL);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa8
+****************************************************************************/
+void x86emuOp2_push_GS(u8 X86EMU_UNUSED(op2))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tGS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_GS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xa9
+****************************************************************************/
+void x86emuOp2_pop_GS(u8 X86EMU_UNUSED(op2))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tGS\n");
+ TRACE_AND_STEP();
+ M.x86.R_GS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xaa
+****************************************************************************/
+void x86emuOp2_bts_R(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ int bit,disp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BTS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval,mask;
+ u32 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ disp = (s16)*shiftreg >> 5;
+ srcval = fetch_data_long(srcoffset+disp);
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_long(srcoffset+disp, srcval | mask);
+ } else {
+ u16 srcval,mask;
+ u16 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ disp = (s16)*shiftreg >> 4;
+ srcval = fetch_data_word(srcoffset+disp);
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_word(srcoffset+disp, srcval | mask);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg,*shiftreg;
+ u32 mask;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg |= mask;
+ } else {
+ u16 *srcreg,*shiftreg;
+ u16 mask;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg |= mask;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xac
+****************************************************************************/
+void x86emuOp2_shrd_IMM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 shift;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SHLD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ destval = fetch_data_long(destoffset);
+ destval = shrd_long(destval,*shiftreg,shift);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *shiftreg;
+
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ destval = fetch_data_word(destoffset);
+ destval = shrd_word(destval,*shiftreg,shift);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ *destreg = shrd_long(*destreg,*shiftreg,shift);
+ } else {
+ u16 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2("%d\n", shift);
+ TRACE_AND_STEP();
+ *destreg = shrd_word(*destreg,*shiftreg,shift);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xad
+****************************************************************************/
+void x86emuOp2_shrd_CL(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SHLD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *shiftreg;
+
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = fetch_data_long(destoffset);
+ destval = shrd_long(destval,*shiftreg,M.x86.R_CL);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *shiftreg;
+
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = fetch_data_word(destoffset);
+ destval = shrd_word(destval,*shiftreg,M.x86.R_CL);
+ store_data_word(destoffset, destval);
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = shrd_long(*destreg,*shiftreg,M.x86.R_CL);
+ } else {
+ u16 *destreg,*shiftreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = shrd_word(*destreg,*shiftreg,M.x86.R_CL);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xaf
+****************************************************************************/
+void x86emuOp2_imul_R_RM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IMUL\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_long(srcoffset);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)srcval);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_word(srcoffset);
+ TRACE_AND_STEP();
+ res = (s16)*destreg * (s16)srcval;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*destreg,(s32)*srcreg);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg,*srcreg;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ res = (s16)*destreg * (s16)*srcreg;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb2
+****************************************************************************/
+void x86emuOp2_lss_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LSS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_SS = fetch_data_word(srcoffset + 2);
+ } else { /* register to register */
+ /* UNDEFINED! */
+ TRACE_AND_STEP();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb3
+****************************************************************************/
+void x86emuOp2_btr_R(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ int bit,disp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BTR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval,mask;
+ u32 *shiftreg;
+
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ disp = (s16)*shiftreg >> 5;
+ srcval = fetch_data_long(srcoffset+disp);
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_long(srcoffset+disp, srcval & ~mask);
+ } else {
+ u16 srcval,mask;
+ u16 *shiftreg;
+
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ disp = (s16)*shiftreg >> 4;
+ srcval = fetch_data_word(srcoffset+disp);
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_word(srcoffset+disp, (u16)(srcval & ~mask));
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg,*shiftreg;
+ u32 mask;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg &= ~mask;
+ } else {
+ u16 *srcreg,*shiftreg;
+ u16 mask;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg &= ~mask;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb4
+****************************************************************************/
+void x86emuOp2_lfs_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LFS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_FS = fetch_data_word(srcoffset + 2);
+ } else { /* register to register */
+ /* UNDEFINED! */
+ TRACE_AND_STEP();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb5
+****************************************************************************/
+void x86emuOp2_lgs_R_IMM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LGS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_GS = fetch_data_word(srcoffset + 2);
+ } else { /* register to register */
+ /* UNDEFINED! */
+ TRACE_AND_STEP();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb6
+****************************************************************************/
+void x86emuOp2_movzx_byte_R_RM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVZX\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u8 *srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ } else {
+ u16 *destreg;
+ u8 *srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xb7
+****************************************************************************/
+void x86emuOp2_movzx_word_R_RM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ u32 *destreg;
+ u32 srcval;
+ u16 *srcreg;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVZX\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else { /* register to register */
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xba
+****************************************************************************/
+void x86emuOp2_btX_I(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ u8 shift;
+ int bit;
+
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (rh) {
+ case 4:
+ DECODE_PRINTF("BT\t");
+ break;
+ case 5:
+ DECODE_PRINTF("BTS\t");
+ break;
+ case 6:
+ DECODE_PRINTF("BTR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("BTC\t");
+ break;
+ default:
+ DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+ TRACE_REGS();
+ printk("%04x:%04x: %02X%02X ILLEGAL EXTENDED X86 OPCODE EXTENSION!\n",
+ M.x86.R_CS, M.x86.R_IP-3,op2, (mod<<6)|(rh<<3)|rl);
+ HALT_SYS();
+ }
+ if (mod < 3) {
+
+ srcoffset = decode_rmXX_address(mod, rl);
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", shift);
+ TRACE_AND_STEP();
+
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval, mask;
+
+ bit = shift & 0x1F;
+ srcval = fetch_data_long(srcoffset);
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ switch (rh) {
+ case 5:
+ store_data_long(srcoffset, srcval | mask);
+ break;
+ case 6:
+ store_data_long(srcoffset, srcval & ~mask);
+ break;
+ case 7:
+ store_data_long(srcoffset, srcval ^ mask);
+ break;
+ default:
+ break;
+ }
+ } else {
+ u16 srcval, mask;
+
+ bit = shift & 0xF;
+ srcval = fetch_data_word(srcoffset);
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ switch (rh) {
+ case 5:
+ store_data_word(srcoffset, srcval | mask);
+ break;
+ case 6:
+ store_data_word(srcoffset, srcval & ~mask);
+ break;
+ case 7:
+ store_data_word(srcoffset, srcval ^ mask);
+ break;
+ default:
+ break;
+ }
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ u32 mask;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", shift);
+ TRACE_AND_STEP();
+ bit = shift & 0x1F;
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ switch (rh) {
+ case 5:
+ *srcreg |= mask;
+ break;
+ case 6:
+ *srcreg &= ~mask;
+ break;
+ case 7:
+ *srcreg ^= mask;
+ break;
+ default:
+ break;
+ }
+ } else {
+ u16 *srcreg;
+ u16 mask;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ shift = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", shift);
+ TRACE_AND_STEP();
+ bit = shift & 0xF;
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ switch (rh) {
+ case 5:
+ *srcreg |= mask;
+ break;
+ case 6:
+ *srcreg &= ~mask;
+ break;
+ case 7:
+ *srcreg ^= mask;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbb
+****************************************************************************/
+void x86emuOp2_btc_R(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ int bit,disp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BTC\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval,mask;
+ u32 *shiftreg;
+
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ disp = (s16)*shiftreg >> 5;
+ srcval = fetch_data_long(srcoffset+disp);
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_long(srcoffset+disp, srcval ^ mask);
+ } else {
+ u16 srcval,mask;
+ u16 *shiftreg;
+
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ disp = (s16)*shiftreg >> 4;
+ srcval = fetch_data_word(srcoffset+disp);
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(srcval & mask,F_CF);
+ store_data_word(srcoffset+disp, (u16)(srcval ^ mask));
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg,*shiftreg;
+ u32 mask;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0x1F;
+ mask = (0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg ^= mask;
+ } else {
+ u16 *srcreg,*shiftreg;
+ u16 mask;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ shiftreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ bit = *shiftreg & 0xF;
+ mask = (u16)(0x1 << bit);
+ CONDITIONAL_SET_FLAG(*srcreg & mask,F_CF);
+ *srcreg ^= mask;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbc
+****************************************************************************/
+void x86emuOp2_bsf(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BSF\n");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval, *dstreg;
+
+ dstreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ srcval = fetch_data_long(srcoffset);
+ CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+ for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
+ if ((srcval >> *dstreg) & 1) break;
+ } else {
+ u16 srcval, *dstreg;
+
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ srcval = fetch_data_word(srcoffset);
+ CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+ for(*dstreg = 0; *dstreg < 16; (*dstreg)++)
+ if ((srcval >> *dstreg) & 1) break;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg, *dstreg;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ dstreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+ for(*dstreg = 0; *dstreg < 32; (*dstreg)++)
+ if ((*srcreg >> *dstreg) & 1) break;
+ } else {
+ u16 *srcreg, *dstreg;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+ for(*dstreg = 0; *dstreg < 16; (*dstreg)++)
+ if ((*srcreg >> *dstreg) & 1) break;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbd
+****************************************************************************/
+void x86emuOp2_bsr(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("BSF\n");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ srcoffset = decode_rmXX_address(mod, rl);
+ DECODE_PRINTF(",");
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 srcval, *dstreg;
+
+ dstreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ srcval = fetch_data_long(srcoffset);
+ CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+ for(*dstreg = 31; *dstreg > 0; (*dstreg)--)
+ if ((srcval >> *dstreg) & 1) break;
+ } else {
+ u16 srcval, *dstreg;
+
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ srcval = fetch_data_word(srcoffset);
+ CONDITIONAL_SET_FLAG(srcval == 0, F_ZF);
+ for(*dstreg = 15; *dstreg > 0; (*dstreg)--)
+ if ((srcval >> *dstreg) & 1) break;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg, *dstreg;
+
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ dstreg = DECODE_RM_LONG_REGISTER(rh);
+ TRACE_AND_STEP();
+ CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+ for(*dstreg = 31; *dstreg > 0; (*dstreg)--)
+ if ((*srcreg >> *dstreg) & 1) break;
+ } else {
+ u16 *srcreg, *dstreg;
+
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ TRACE_AND_STEP();
+ CONDITIONAL_SET_FLAG(*srcreg == 0, F_ZF);
+ for(*dstreg = 15; *dstreg > 0; (*dstreg)--)
+ if ((*srcreg >> *dstreg) & 1) break;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbe
+****************************************************************************/
+void x86emuOp2_movsx_byte_R_RM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVSX\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = (s32)((s8)fetch_data_byte(srcoffset));
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = (s16)((s8)fetch_data_byte(srcoffset));
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ } else { /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u8 *srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = (s32)((s8)*srcreg);
+ } else {
+ u16 *destreg;
+ u8 *srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = (s16)((s8)*srcreg);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f,0xbf
+****************************************************************************/
+void x86emuOp2_movsx_word_R_RM(u8 X86EMU_UNUSED(op2))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ u32 *destreg;
+ u32 srcval;
+ u16 *srcreg;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVSX\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (mod < 3) {
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rmXX_address(mod, rl);
+ srcval = (s32)((s16)fetch_data_word(srcoffset));
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else { /* register to register */
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = (s32)((s16)*srcreg);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/***************************************************************************
+ * Double byte operation code table:
+ **************************************************************************/
+void (*x86emu_optab2[256])(u8) =
+{
+/* 0x00 */ x86emuOp2_illegal_op, /* Group F (ring 0 PM) */
+/* 0x01 */ x86emuOp2_illegal_op, /* Group G (ring 0 PM) */
+/* 0x02 */ x86emuOp2_illegal_op, /* lar (ring 0 PM) */
+/* 0x03 */ x86emuOp2_illegal_op, /* lsl (ring 0 PM) */
+/* 0x04 */ x86emuOp2_illegal_op,
+/* 0x05 */ x86emuOp2_illegal_op, /* loadall (undocumented) */
+/* 0x06 */ x86emuOp2_illegal_op, /* clts (ring 0 PM) */
+/* 0x07 */ x86emuOp2_illegal_op, /* loadall (undocumented) */
+/* 0x08 */ x86emuOp2_illegal_op, /* invd (ring 0 PM) */
+/* 0x09 */ x86emuOp2_illegal_op, /* wbinvd (ring 0 PM) */
+/* 0x0a */ x86emuOp2_illegal_op,
+/* 0x0b */ x86emuOp2_illegal_op,
+/* 0x0c */ x86emuOp2_illegal_op,
+/* 0x0d */ x86emuOp2_illegal_op,
+/* 0x0e */ x86emuOp2_illegal_op,
+/* 0x0f */ x86emuOp2_illegal_op,
+
+/* 0x10 */ x86emuOp2_illegal_op,
+/* 0x11 */ x86emuOp2_illegal_op,
+/* 0x12 */ x86emuOp2_illegal_op,
+/* 0x13 */ x86emuOp2_illegal_op,
+/* 0x14 */ x86emuOp2_illegal_op,
+/* 0x15 */ x86emuOp2_illegal_op,
+/* 0x16 */ x86emuOp2_illegal_op,
+/* 0x17 */ x86emuOp2_illegal_op,
+/* 0x18 */ x86emuOp2_illegal_op,
+/* 0x19 */ x86emuOp2_illegal_op,
+/* 0x1a */ x86emuOp2_illegal_op,
+/* 0x1b */ x86emuOp2_illegal_op,
+/* 0x1c */ x86emuOp2_illegal_op,
+/* 0x1d */ x86emuOp2_illegal_op,
+/* 0x1e */ x86emuOp2_illegal_op,
+/* 0x1f */ x86emuOp2_illegal_op,
+
+/* 0x20 */ x86emuOp2_illegal_op, /* mov reg32,creg (ring 0 PM) */
+/* 0x21 */ x86emuOp2_illegal_op, /* mov reg32,dreg (ring 0 PM) */
+/* 0x22 */ x86emuOp2_illegal_op, /* mov creg,reg32 (ring 0 PM) */
+/* 0x23 */ x86emuOp2_illegal_op, /* mov dreg,reg32 (ring 0 PM) */
+/* 0x24 */ x86emuOp2_illegal_op, /* mov reg32,treg (ring 0 PM) */
+/* 0x25 */ x86emuOp2_illegal_op,
+/* 0x26 */ x86emuOp2_illegal_op, /* mov treg,reg32 (ring 0 PM) */
+/* 0x27 */ x86emuOp2_illegal_op,
+/* 0x28 */ x86emuOp2_illegal_op,
+/* 0x29 */ x86emuOp2_illegal_op,
+/* 0x2a */ x86emuOp2_illegal_op,
+/* 0x2b */ x86emuOp2_illegal_op,
+/* 0x2c */ x86emuOp2_illegal_op,
+/* 0x2d */ x86emuOp2_illegal_op,
+/* 0x2e */ x86emuOp2_illegal_op,
+/* 0x2f */ x86emuOp2_illegal_op,
+
+/* 0x30 */ x86emuOp2_illegal_op,
+/* 0x31 */ x86emuOp2_illegal_op,
+/* 0x32 */ x86emuOp2_illegal_op,
+/* 0x33 */ x86emuOp2_illegal_op,
+/* 0x34 */ x86emuOp2_illegal_op,
+/* 0x35 */ x86emuOp2_illegal_op,
+/* 0x36 */ x86emuOp2_illegal_op,
+/* 0x37 */ x86emuOp2_illegal_op,
+/* 0x38 */ x86emuOp2_illegal_op,
+/* 0x39 */ x86emuOp2_illegal_op,
+/* 0x3a */ x86emuOp2_illegal_op,
+/* 0x3b */ x86emuOp2_illegal_op,
+/* 0x3c */ x86emuOp2_illegal_op,
+/* 0x3d */ x86emuOp2_illegal_op,
+/* 0x3e */ x86emuOp2_illegal_op,
+/* 0x3f */ x86emuOp2_illegal_op,
+
+/* 0x40 */ x86emuOp2_illegal_op,
+/* 0x41 */ x86emuOp2_illegal_op,
+/* 0x42 */ x86emuOp2_illegal_op,
+/* 0x43 */ x86emuOp2_illegal_op,
+/* 0x44 */ x86emuOp2_illegal_op,
+/* 0x45 */ x86emuOp2_illegal_op,
+/* 0x46 */ x86emuOp2_illegal_op,
+/* 0x47 */ x86emuOp2_illegal_op,
+/* 0x48 */ x86emuOp2_illegal_op,
+/* 0x49 */ x86emuOp2_illegal_op,
+/* 0x4a */ x86emuOp2_illegal_op,
+/* 0x4b */ x86emuOp2_illegal_op,
+/* 0x4c */ x86emuOp2_illegal_op,
+/* 0x4d */ x86emuOp2_illegal_op,
+/* 0x4e */ x86emuOp2_illegal_op,
+/* 0x4f */ x86emuOp2_illegal_op,
+
+/* 0x50 */ x86emuOp2_illegal_op,
+/* 0x51 */ x86emuOp2_illegal_op,
+/* 0x52 */ x86emuOp2_illegal_op,
+/* 0x53 */ x86emuOp2_illegal_op,
+/* 0x54 */ x86emuOp2_illegal_op,
+/* 0x55 */ x86emuOp2_illegal_op,
+/* 0x56 */ x86emuOp2_illegal_op,
+/* 0x57 */ x86emuOp2_illegal_op,
+/* 0x58 */ x86emuOp2_illegal_op,
+/* 0x59 */ x86emuOp2_illegal_op,
+/* 0x5a */ x86emuOp2_illegal_op,
+/* 0x5b */ x86emuOp2_illegal_op,
+/* 0x5c */ x86emuOp2_illegal_op,
+/* 0x5d */ x86emuOp2_illegal_op,
+/* 0x5e */ x86emuOp2_illegal_op,
+/* 0x5f */ x86emuOp2_illegal_op,
+
+/* 0x60 */ x86emuOp2_illegal_op,
+/* 0x61 */ x86emuOp2_illegal_op,
+/* 0x62 */ x86emuOp2_illegal_op,
+/* 0x63 */ x86emuOp2_illegal_op,
+/* 0x64 */ x86emuOp2_illegal_op,
+/* 0x65 */ x86emuOp2_illegal_op,
+/* 0x66 */ x86emuOp2_illegal_op,
+/* 0x67 */ x86emuOp2_illegal_op,
+/* 0x68 */ x86emuOp2_illegal_op,
+/* 0x69 */ x86emuOp2_illegal_op,
+/* 0x6a */ x86emuOp2_illegal_op,
+/* 0x6b */ x86emuOp2_illegal_op,
+/* 0x6c */ x86emuOp2_illegal_op,
+/* 0x6d */ x86emuOp2_illegal_op,
+/* 0x6e */ x86emuOp2_illegal_op,
+/* 0x6f */ x86emuOp2_illegal_op,
+
+/* 0x70 */ x86emuOp2_illegal_op,
+/* 0x71 */ x86emuOp2_illegal_op,
+/* 0x72 */ x86emuOp2_illegal_op,
+/* 0x73 */ x86emuOp2_illegal_op,
+/* 0x74 */ x86emuOp2_illegal_op,
+/* 0x75 */ x86emuOp2_illegal_op,
+/* 0x76 */ x86emuOp2_illegal_op,
+/* 0x77 */ x86emuOp2_illegal_op,
+/* 0x78 */ x86emuOp2_illegal_op,
+/* 0x79 */ x86emuOp2_illegal_op,
+/* 0x7a */ x86emuOp2_illegal_op,
+/* 0x7b */ x86emuOp2_illegal_op,
+/* 0x7c */ x86emuOp2_illegal_op,
+/* 0x7d */ x86emuOp2_illegal_op,
+/* 0x7e */ x86emuOp2_illegal_op,
+/* 0x7f */ x86emuOp2_illegal_op,
+
+/* 0x80 */ x86emuOp2_long_jump,
+/* 0x81 */ x86emuOp2_long_jump,
+/* 0x82 */ x86emuOp2_long_jump,
+/* 0x83 */ x86emuOp2_long_jump,
+/* 0x84 */ x86emuOp2_long_jump,
+/* 0x85 */ x86emuOp2_long_jump,
+/* 0x86 */ x86emuOp2_long_jump,
+/* 0x87 */ x86emuOp2_long_jump,
+/* 0x88 */ x86emuOp2_long_jump,
+/* 0x89 */ x86emuOp2_long_jump,
+/* 0x8a */ x86emuOp2_long_jump,
+/* 0x8b */ x86emuOp2_long_jump,
+/* 0x8c */ x86emuOp2_long_jump,
+/* 0x8d */ x86emuOp2_long_jump,
+/* 0x8e */ x86emuOp2_long_jump,
+/* 0x8f */ x86emuOp2_long_jump,
+
+/* 0x90 */ x86emuOp2_set_byte,
+/* 0x91 */ x86emuOp2_set_byte,
+/* 0x92 */ x86emuOp2_set_byte,
+/* 0x93 */ x86emuOp2_set_byte,
+/* 0x94 */ x86emuOp2_set_byte,
+/* 0x95 */ x86emuOp2_set_byte,
+/* 0x96 */ x86emuOp2_set_byte,
+/* 0x97 */ x86emuOp2_set_byte,
+/* 0x98 */ x86emuOp2_set_byte,
+/* 0x99 */ x86emuOp2_set_byte,
+/* 0x9a */ x86emuOp2_set_byte,
+/* 0x9b */ x86emuOp2_set_byte,
+/* 0x9c */ x86emuOp2_set_byte,
+/* 0x9d */ x86emuOp2_set_byte,
+/* 0x9e */ x86emuOp2_set_byte,
+/* 0x9f */ x86emuOp2_set_byte,
+
+/* 0xa0 */ x86emuOp2_push_FS,
+/* 0xa1 */ x86emuOp2_pop_FS,
+/* 0xa2 */ x86emuOp2_illegal_op,
+/* 0xa3 */ x86emuOp2_bt_R,
+/* 0xa4 */ x86emuOp2_shld_IMM,
+/* 0xa5 */ x86emuOp2_shld_CL,
+/* 0xa6 */ x86emuOp2_illegal_op,
+/* 0xa7 */ x86emuOp2_illegal_op,
+/* 0xa8 */ x86emuOp2_push_GS,
+/* 0xa9 */ x86emuOp2_pop_GS,
+/* 0xaa */ x86emuOp2_illegal_op,
+/* 0xab */ x86emuOp2_bt_R,
+/* 0xac */ x86emuOp2_shrd_IMM,
+/* 0xad */ x86emuOp2_shrd_CL,
+/* 0xae */ x86emuOp2_illegal_op,
+/* 0xaf */ x86emuOp2_imul_R_RM,
+
+/* 0xb0 */ x86emuOp2_illegal_op, /* TODO: cmpxchg */
+/* 0xb1 */ x86emuOp2_illegal_op, /* TODO: cmpxchg */
+/* 0xb2 */ x86emuOp2_lss_R_IMM,
+/* 0xb3 */ x86emuOp2_btr_R,
+/* 0xb4 */ x86emuOp2_lfs_R_IMM,
+/* 0xb5 */ x86emuOp2_lgs_R_IMM,
+/* 0xb6 */ x86emuOp2_movzx_byte_R_RM,
+/* 0xb7 */ x86emuOp2_movzx_word_R_RM,
+/* 0xb8 */ x86emuOp2_illegal_op,
+/* 0xb9 */ x86emuOp2_illegal_op,
+/* 0xba */ x86emuOp2_btX_I,
+/* 0xbb */ x86emuOp2_btc_R,
+/* 0xbc */ x86emuOp2_bsf,
+/* 0xbd */ x86emuOp2_bsr,
+/* 0xbe */ x86emuOp2_movsx_byte_R_RM,
+/* 0xbf */ x86emuOp2_movsx_word_R_RM,
+
+/* 0xc0 */ x86emuOp2_illegal_op, /* TODO: xadd */
+/* 0xc1 */ x86emuOp2_illegal_op, /* TODO: xadd */
+/* 0xc2 */ x86emuOp2_illegal_op,
+/* 0xc3 */ x86emuOp2_illegal_op,
+/* 0xc4 */ x86emuOp2_illegal_op,
+/* 0xc5 */ x86emuOp2_illegal_op,
+/* 0xc6 */ x86emuOp2_illegal_op,
+/* 0xc7 */ x86emuOp2_illegal_op,
+/* 0xc8 */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xc9 */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xca */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xcb */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xcc */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xcd */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xce */ x86emuOp2_illegal_op, /* TODO: bswap */
+/* 0xcf */ x86emuOp2_illegal_op, /* TODO: bswap */
+
+/* 0xd0 */ x86emuOp2_illegal_op,
+/* 0xd1 */ x86emuOp2_illegal_op,
+/* 0xd2 */ x86emuOp2_illegal_op,
+/* 0xd3 */ x86emuOp2_illegal_op,
+/* 0xd4 */ x86emuOp2_illegal_op,
+/* 0xd5 */ x86emuOp2_illegal_op,
+/* 0xd6 */ x86emuOp2_illegal_op,
+/* 0xd7 */ x86emuOp2_illegal_op,
+/* 0xd8 */ x86emuOp2_illegal_op,
+/* 0xd9 */ x86emuOp2_illegal_op,
+/* 0xda */ x86emuOp2_illegal_op,
+/* 0xdb */ x86emuOp2_illegal_op,
+/* 0xdc */ x86emuOp2_illegal_op,
+/* 0xdd */ x86emuOp2_illegal_op,
+/* 0xde */ x86emuOp2_illegal_op,
+/* 0xdf */ x86emuOp2_illegal_op,
+
+/* 0xe0 */ x86emuOp2_illegal_op,
+/* 0xe1 */ x86emuOp2_illegal_op,
+/* 0xe2 */ x86emuOp2_illegal_op,
+/* 0xe3 */ x86emuOp2_illegal_op,
+/* 0xe4 */ x86emuOp2_illegal_op,
+/* 0xe5 */ x86emuOp2_illegal_op,
+/* 0xe6 */ x86emuOp2_illegal_op,
+/* 0xe7 */ x86emuOp2_illegal_op,
+/* 0xe8 */ x86emuOp2_illegal_op,
+/* 0xe9 */ x86emuOp2_illegal_op,
+/* 0xea */ x86emuOp2_illegal_op,
+/* 0xeb */ x86emuOp2_illegal_op,
+/* 0xec */ x86emuOp2_illegal_op,
+/* 0xed */ x86emuOp2_illegal_op,
+/* 0xee */ x86emuOp2_illegal_op,
+/* 0xef */ x86emuOp2_illegal_op,
+
+/* 0xf0 */ x86emuOp2_illegal_op,
+/* 0xf1 */ x86emuOp2_illegal_op,
+/* 0xf2 */ x86emuOp2_illegal_op,
+/* 0xf3 */ x86emuOp2_illegal_op,
+/* 0xf4 */ x86emuOp2_illegal_op,
+/* 0xf5 */ x86emuOp2_illegal_op,
+/* 0xf6 */ x86emuOp2_illegal_op,
+/* 0xf7 */ x86emuOp2_illegal_op,
+/* 0xf8 */ x86emuOp2_illegal_op,
+/* 0xf9 */ x86emuOp2_illegal_op,
+/* 0xfa */ x86emuOp2_illegal_op,
+/* 0xfb */ x86emuOp2_illegal_op,
+/* 0xfc */ x86emuOp2_illegal_op,
+/* 0xfd */ x86emuOp2_illegal_op,
+/* 0xfe */ x86emuOp2_illegal_op,
+/* 0xff */ x86emuOp2_illegal_op,
+};
diff --git a/src/devices/emulator/x86emu/prim_asm.h b/src/devices/emulator/x86emu/prim_asm.h
new file mode 100644
index 0000000000..4fa8d55034
--- /dev/null
+++ b/src/devices/emulator/x86emu/prim_asm.h
@@ -0,0 +1,971 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: Watcom C++ 10.6 or later
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Inline assembler versions of the primitive operand
+* functions for faster performance. At the moment this is
+* x86 inline assembler, but these functions could be replaced
+* with native inline assembler for each supported processor
+* platform.
+*
+****************************************************************************/
+/* $XFree86: xc/extras/x86emu/src/x86emu/x86emu/prim_asm.h,v 1.3 2000/04/19 15:48:15 tsi Exp $ */
+
+#ifndef __X86EMU_PRIM_ASM_H
+#define __X86EMU_PRIM_ASM_H
+
+#ifdef __WATCOMC__
+
+#ifndef VALIDATE
+#define __HAVE_INLINE_ASSEMBLER__
+#endif
+
+u32 get_flags_asm(void);
+#pragma aux get_flags_asm = \
+ "pushf" \
+ "pop eax" \
+ value [eax] \
+ modify exact [eax];
+
+u16 aaa_word_asm(u32 *flags,u16 d);
+#pragma aux aaa_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "aaa" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u16 aas_word_asm(u32 *flags,u16 d);
+#pragma aux aas_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "aas" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u16 aad_word_asm(u32 *flags,u16 d);
+#pragma aux aad_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "aad" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u16 aam_word_asm(u32 *flags,u8 d);
+#pragma aux aam_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "aam" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [ax] \
+ modify exact [ax];
+
+u8 adc_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux adc_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "adc al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 adc_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux adc_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "adc ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 adc_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux adc_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "adc eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 add_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux add_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "add al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 add_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux add_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "add ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 add_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux add_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "add eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 and_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux and_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "and al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 and_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux and_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "and ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 and_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux and_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "and eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 cmp_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux cmp_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "cmp al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 cmp_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux cmp_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "cmp ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 cmp_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux cmp_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "cmp eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 daa_byte_asm(u32 *flags,u8 d);
+#pragma aux daa_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "daa" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u8 das_byte_asm(u32 *flags,u8 d);
+#pragma aux das_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "das" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u8 dec_byte_asm(u32 *flags,u8 d);
+#pragma aux dec_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "dec al" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u16 dec_word_asm(u32 *flags,u16 d);
+#pragma aux dec_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "dec ax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u32 dec_long_asm(u32 *flags,u32 d);
+#pragma aux dec_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "dec eax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] \
+ value [eax] \
+ modify exact [eax];
+
+u8 inc_byte_asm(u32 *flags,u8 d);
+#pragma aux inc_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "inc al" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u16 inc_word_asm(u32 *flags,u16 d);
+#pragma aux inc_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "inc ax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u32 inc_long_asm(u32 *flags,u32 d);
+#pragma aux inc_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "inc eax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] \
+ value [eax] \
+ modify exact [eax];
+
+u8 or_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux or_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "or al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 or_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux or_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "or ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 or_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux or_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "or eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 neg_byte_asm(u32 *flags,u8 d);
+#pragma aux neg_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "neg al" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u16 neg_word_asm(u32 *flags,u16 d);
+#pragma aux neg_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "neg ax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u32 neg_long_asm(u32 *flags,u32 d);
+#pragma aux neg_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "neg eax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] \
+ value [eax] \
+ modify exact [eax];
+
+u8 not_byte_asm(u32 *flags,u8 d);
+#pragma aux not_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "not al" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] \
+ value [al] \
+ modify exact [al];
+
+u16 not_word_asm(u32 *flags,u16 d);
+#pragma aux not_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "not ax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] \
+ value [ax] \
+ modify exact [ax];
+
+u32 not_long_asm(u32 *flags,u32 d);
+#pragma aux not_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "not eax" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] \
+ value [eax] \
+ modify exact [eax];
+
+u8 rcl_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux rcl_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcl al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 rcl_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux rcl_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcl ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 rcl_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux rcl_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcl eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 rcr_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux rcr_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcr al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 rcr_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux rcr_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcr ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 rcr_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux rcr_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "rcr eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 rol_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux rol_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "rol al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 rol_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux rol_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "rol ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 rol_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux rol_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "rol eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 ror_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux ror_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "ror al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 ror_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux ror_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "ror ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 ror_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux ror_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "ror eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 shl_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux shl_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "shl al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 shl_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux shl_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "shl ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 shl_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux shl_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "shl eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 shr_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux shr_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "shr al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 shr_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux shr_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "shr ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 shr_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux shr_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "shr eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u8 sar_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux sar_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "sar al,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [cl] \
+ value [al] \
+ modify exact [al cl];
+
+u16 sar_word_asm(u32 *flags,u16 d, u8 s);
+#pragma aux sar_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "sar ax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [cl] \
+ value [ax] \
+ modify exact [ax cl];
+
+u32 sar_long_asm(u32 *flags,u32 d, u8 s);
+#pragma aux sar_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "sar eax,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [cl] \
+ value [eax] \
+ modify exact [eax cl];
+
+u16 shld_word_asm(u32 *flags,u16 d, u16 fill, u8 s);
+#pragma aux shld_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "shld ax,dx,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [dx] [cl] \
+ value [ax] \
+ modify exact [ax dx cl];
+
+u32 shld_long_asm(u32 *flags,u32 d, u32 fill, u8 s);
+#pragma aux shld_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "shld eax,edx,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [edx] [cl] \
+ value [eax] \
+ modify exact [eax edx cl];
+
+u16 shrd_word_asm(u32 *flags,u16 d, u16 fill, u8 s);
+#pragma aux shrd_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "shrd ax,dx,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [dx] [cl] \
+ value [ax] \
+ modify exact [ax dx cl];
+
+u32 shrd_long_asm(u32 *flags,u32 d, u32 fill, u8 s);
+#pragma aux shrd_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "shrd eax,edx,cl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [edx] [cl] \
+ value [eax] \
+ modify exact [eax edx cl];
+
+u8 sbb_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux sbb_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "sbb al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 sbb_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux sbb_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "sbb ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 sbb_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux sbb_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "sbb eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+u8 sub_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux sub_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "sub al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 sub_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux sub_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "sub ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 sub_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux sub_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "sub eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+void test_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux test_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "test al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ modify exact [al bl];
+
+void test_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux test_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "test ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ modify exact [ax bx];
+
+void test_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux test_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "test eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ modify exact [eax ebx];
+
+u8 xor_byte_asm(u32 *flags,u8 d, u8 s);
+#pragma aux xor_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "xor al,bl" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [al] [bl] \
+ value [al] \
+ modify exact [al bl];
+
+u16 xor_word_asm(u32 *flags,u16 d, u16 s);
+#pragma aux xor_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "xor ax,bx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [ax] [bx] \
+ value [ax] \
+ modify exact [ax bx];
+
+u32 xor_long_asm(u32 *flags,u32 d, u32 s);
+#pragma aux xor_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "xor eax,ebx" \
+ "pushf" \
+ "pop [edi]" \
+ parm [edi] [eax] [ebx] \
+ value [eax] \
+ modify exact [eax ebx];
+
+void imul_byte_asm(u32 *flags,u16 *ax,u8 d,u8 s);
+#pragma aux imul_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "imul bl" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ parm [edi] [esi] [al] [bl] \
+ modify exact [esi ax bl];
+
+void imul_word_asm(u32 *flags,u16 *ax,u16 *dx,u16 d,u16 s);
+#pragma aux imul_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "imul bx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ "mov [ecx],dx" \
+ parm [edi] [esi] [ecx] [ax] [bx]\
+ modify exact [esi edi ax bx dx];
+
+void imul_long_asm(u32 *flags,u32 *eax,u32 *edx,u32 d,u32 s);
+#pragma aux imul_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "imul ebx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],eax" \
+ "mov [ecx],edx" \
+ parm [edi] [esi] [ecx] [eax] [ebx] \
+ modify exact [esi edi eax ebx edx];
+
+void mul_byte_asm(u32 *flags,u16 *ax,u8 d,u8 s);
+#pragma aux mul_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "mul bl" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ parm [edi] [esi] [al] [bl] \
+ modify exact [esi ax bl];
+
+void mul_word_asm(u32 *flags,u16 *ax,u16 *dx,u16 d,u16 s);
+#pragma aux mul_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "mul bx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ "mov [ecx],dx" \
+ parm [edi] [esi] [ecx] [ax] [bx]\
+ modify exact [esi edi ax bx dx];
+
+void mul_long_asm(u32 *flags,u32 *eax,u32 *edx,u32 d,u32 s);
+#pragma aux mul_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "mul ebx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],eax" \
+ "mov [ecx],edx" \
+ parm [edi] [esi] [ecx] [eax] [ebx] \
+ modify exact [esi edi eax ebx edx];
+
+void idiv_byte_asm(u32 *flags,u8 *al,u8 *ah,u16 d,u8 s);
+#pragma aux idiv_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "idiv bl" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],al" \
+ "mov [ecx],ah" \
+ parm [edi] [esi] [ecx] [ax] [bl]\
+ modify exact [esi edi ax bl];
+
+void idiv_word_asm(u32 *flags,u16 *ax,u16 *dx,u16 dlo,u16 dhi,u16 s);
+#pragma aux idiv_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "idiv bx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ "mov [ecx],dx" \
+ parm [edi] [esi] [ecx] [ax] [dx] [bx]\
+ modify exact [esi edi ax dx bx];
+
+void idiv_long_asm(u32 *flags,u32 *eax,u32 *edx,u32 dlo,u32 dhi,u32 s);
+#pragma aux idiv_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "idiv ebx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],eax" \
+ "mov [ecx],edx" \
+ parm [edi] [esi] [ecx] [eax] [edx] [ebx]\
+ modify exact [esi edi eax edx ebx];
+
+void div_byte_asm(u32 *flags,u8 *al,u8 *ah,u16 d,u8 s);
+#pragma aux div_byte_asm = \
+ "push [edi]" \
+ "popf" \
+ "div bl" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],al" \
+ "mov [ecx],ah" \
+ parm [edi] [esi] [ecx] [ax] [bl]\
+ modify exact [esi edi ax bl];
+
+void div_word_asm(u32 *flags,u16 *ax,u16 *dx,u16 dlo,u16 dhi,u16 s);
+#pragma aux div_word_asm = \
+ "push [edi]" \
+ "popf" \
+ "div bx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],ax" \
+ "mov [ecx],dx" \
+ parm [edi] [esi] [ecx] [ax] [dx] [bx]\
+ modify exact [esi edi ax dx bx];
+
+void div_long_asm(u32 *flags,u32 *eax,u32 *edx,u32 dlo,u32 dhi,u32 s);
+#pragma aux div_long_asm = \
+ "push [edi]" \
+ "popf" \
+ "div ebx" \
+ "pushf" \
+ "pop [edi]" \
+ "mov [esi],eax" \
+ "mov [ecx],edx" \
+ parm [edi] [esi] [ecx] [eax] [edx] [ebx]\
+ modify exact [esi edi eax edx ebx];
+
+#endif
+
+#endif /* __X86EMU_PRIM_ASM_H */
diff --git a/src/devices/emulator/x86emu/prim_ops.c b/src/devices/emulator/x86emu/prim_ops.c
new file mode 100644
index 0000000000..bea5aef481
--- /dev/null
+++ b/src/devices/emulator/x86emu/prim_ops.c
@@ -0,0 +1,2442 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file contains the code to implement the primitive
+* machine operations used by the emulation code in ops.c
+*
+* Carry Chain Calculation
+*
+* This represents a somewhat expensive calculation which is
+* apparently required to emulate the setting of the OF and AF flag.
+* The latter is not so important, but the former is. The overflow
+* flag is the XOR of the top two bits of the carry chain for an
+* addition (similar for subtraction). Since we do not want to
+* simulate the addition in a bitwise manner, we try to calculate the
+* carry chain given the two operands and the result.
+*
+* So, given the following table, which represents the addition of two
+* bits, we can derive a formula for the carry chain.
+*
+* a b cin r cout
+* 0 0 0 0 0
+* 0 0 1 1 0
+* 0 1 0 1 0
+* 0 1 1 0 1
+* 1 0 0 1 0
+* 1 0 1 0 1
+* 1 1 0 0 1
+* 1 1 1 1 1
+*
+* Construction of table for cout:
+*
+* ab
+* r \ 00 01 11 10
+* |------------------
+* 0 | 0 1 1 1
+* 1 | 0 0 1 0
+*
+* By inspection, one gets: cc = ab + r'(a + b)
+*
+* That represents alot of operations, but NO CHOICE....
+*
+* Borrow Chain Calculation.
+*
+* The following table represents the subtraction of two bits, from
+* which we can derive a formula for the borrow chain.
+*
+* a b bin r bout
+* 0 0 0 0 0
+* 0 0 1 1 1
+* 0 1 0 1 1
+* 0 1 1 0 1
+* 1 0 0 1 0
+* 1 0 1 0 0
+* 1 1 0 0 0
+* 1 1 1 1 1
+*
+* Construction of table for cout:
+*
+* ab
+* r \ 00 01 11 10
+* |------------------
+* 0 | 0 1 0 0
+* 1 | 1 1 1 0
+*
+* By inspection, one gets: bc = a'b + r(a' + b)
+*
+****************************************************************************/
+
+#define PRIM_OPS_NO_REDEFINE_ASM
+#include "x86emui.h"
+#define abs(x) (x ? x>0: -x)
+
+/*------------------------- Global Variables ------------------------------*/
+
+static u32 x86emu_parity_tab[8] =
+{
+ 0x96696996,
+ 0x69969669,
+ 0x69969669,
+ 0x96696996,
+ 0x69969669,
+ 0x96696996,
+ 0x96696996,
+ 0x69969669,
+};
+
+#define PARITY(x) (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0)
+#define XOR2(x) (((x) ^ ((x)>>1)) & 0x1)
+
+/*----------------------------- Implementation ----------------------------*/
+
+
+/*--------- Side effects helper functions -------*/
+
+/****************************************************************************
+REMARKS:
+implements side efects for byte operations that don't overflow
+****************************************************************************/
+
+static void set_parity_flag(u32 res)
+{
+ CONDITIONAL_SET_FLAG(PARITY(res & 0xFF), F_PF);
+}
+
+static void set_szp_flags_8(u8 res)
+{
+ CONDITIONAL_SET_FLAG(res & 0x80, F_SF);
+ CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+ set_parity_flag(res);
+}
+
+static void set_szp_flags_16(u16 res)
+{
+ CONDITIONAL_SET_FLAG(res & 0x8000, F_SF);
+ CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+ set_parity_flag(res);
+}
+
+static void set_szp_flags_32(u32 res)
+{
+ CONDITIONAL_SET_FLAG(res & 0x80000000, F_SF);
+ CONDITIONAL_SET_FLAG(res == 0, F_ZF);
+ set_parity_flag(res);
+}
+
+static void no_carry_byte_side_eff(u8 res)
+{
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ set_szp_flags_8(res);
+}
+
+static void no_carry_word_side_eff(u16 res)
+{
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ set_szp_flags_16(res);
+}
+
+static void no_carry_long_side_eff(u32 res)
+{
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ set_szp_flags_32(res);
+}
+
+static void calc_carry_chain(int bits, u32 d, u32 s, u32 res, int set_carry)
+{
+ u32 cc;
+
+ cc = (s & d) | ((~res) & (s | d));
+ CONDITIONAL_SET_FLAG(XOR2(cc >> (bits - 2)), F_OF);
+ CONDITIONAL_SET_FLAG(cc & 0x8, F_AF);
+ if (set_carry) {
+ CONDITIONAL_SET_FLAG(res & (1 << bits), F_CF);
+ }
+}
+
+static void calc_borrow_chain(int bits, u32 d, u32 s, u32 res, int set_carry)
+{
+ u32 bc;
+
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> (bits - 2)), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ if (set_carry) {
+ CONDITIONAL_SET_FLAG(bc & (1 << (bits - 1)), F_CF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAA instruction and side effects.
+****************************************************************************/
+u16 aaa_word(u16 d)
+{
+ u16 res;
+ if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) {
+ d += 0x6;
+ d += 0x100;
+ SET_FLAG(F_AF);
+ SET_FLAG(F_CF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ }
+ res = (u16)(d & 0xFF0F);
+ set_szp_flags_16(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAA instruction and side effects.
+****************************************************************************/
+u16 aas_word(u16 d)
+{
+ u16 res;
+ if ((d & 0xf) > 0x9 || ACCESS_FLAG(F_AF)) {
+ d -= 0x6;
+ d -= 0x100;
+ SET_FLAG(F_AF);
+ SET_FLAG(F_CF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ }
+ res = (u16)(d & 0xFF0F);
+ set_szp_flags_16(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAD instruction and side effects.
+****************************************************************************/
+u16 aad_word(u16 d)
+{
+ u16 l;
+ u8 hb, lb;
+
+ hb = (u8)((d >> 8) & 0xff);
+ lb = (u8)((d & 0xff));
+ l = (u16)((lb + 10 * hb) & 0xFF);
+
+ no_carry_byte_side_eff(l & 0xFF);
+ return l;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AAM instruction and side effects.
+****************************************************************************/
+u16 aam_word(u8 d)
+{
+ u16 h, l;
+
+ h = (u16)(d / 10);
+ l = (u16)(d % 10);
+ l |= (u16)(h << 8);
+
+ no_carry_byte_side_eff(l & 0xFF);
+ return l;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u8 adc_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + s;
+ if (ACCESS_FLAG(F_CF)) res++;
+
+ set_szp_flags_8(res);
+ calc_carry_chain(8,s,d,res,1);
+
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u16 adc_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + s;
+ if (ACCESS_FLAG(F_CF))
+ res++;
+
+ set_szp_flags_16((u16)res);
+ calc_carry_chain(16,s,d,res,1);
+
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADC instruction and side effects.
+****************************************************************************/
+u32 adc_long(u32 d, u32 s)
+{
+ u32 lo; /* all operands in native machine order */
+ u32 hi;
+ u32 res;
+
+ lo = (d & 0xFFFF) + (s & 0xFFFF);
+ res = d + s;
+
+ if (ACCESS_FLAG(F_CF)) {
+ lo++;
+ res++;
+ }
+
+ hi = (lo >> 16) + (d >> 16) + (s >> 16);
+
+ set_szp_flags_32(res);
+ calc_carry_chain(32,s,d,res,0);
+
+ CONDITIONAL_SET_FLAG(hi & 0x10000, F_CF);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u8 add_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + s;
+ set_szp_flags_8((u8)res);
+ calc_carry_chain(8,s,d,res,1);
+
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u16 add_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + s;
+ set_szp_flags_16((u16)res);
+ calc_carry_chain(16,s,d,res,1);
+
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ADD instruction and side effects.
+****************************************************************************/
+u32 add_long(u32 d, u32 s)
+{
+ u32 res;
+
+ res = d + s;
+ set_szp_flags_32(res);
+ calc_carry_chain(32,s,d,res,0);
+
+ CONDITIONAL_SET_FLAG(res < d || res < s, F_CF);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u8 and_byte(u8 d, u8 s)
+{
+ u8 res; /* all operands in native machine order */
+
+ res = d & s;
+
+ no_carry_byte_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u16 and_word(u16 d, u16 s)
+{
+ u16 res; /* all operands in native machine order */
+
+ res = d & s;
+
+ no_carry_word_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the AND instruction and side effects.
+****************************************************************************/
+u32 and_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d & s;
+ no_carry_long_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u8 cmp_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - s;
+ set_szp_flags_8((u8)res);
+ calc_borrow_chain(8, d, s, res, 1);
+
+ return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u16 cmp_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - s;
+ set_szp_flags_16((u16)res);
+ calc_borrow_chain(16, d, s, res, 1);
+
+ return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the CMP instruction and side effects.
+****************************************************************************/
+u32 cmp_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - s;
+ set_szp_flags_32(res);
+ calc_borrow_chain(32, d, s, res, 1);
+
+ return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DAA instruction and side effects.
+****************************************************************************/
+u8 daa_byte(u8 d)
+{
+ u32 res = d;
+ if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) {
+ res += 6;
+ SET_FLAG(F_AF);
+ }
+ if (res > 0x9F || ACCESS_FLAG(F_CF)) {
+ res += 0x60;
+ SET_FLAG(F_CF);
+ }
+ set_szp_flags_8((u8)res);
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DAS instruction and side effects.
+****************************************************************************/
+u8 das_byte(u8 d)
+{
+ if ((d & 0xf) > 9 || ACCESS_FLAG(F_AF)) {
+ d -= 6;
+ SET_FLAG(F_AF);
+ }
+ if (d > 0x9F || ACCESS_FLAG(F_CF)) {
+ d -= 0x60;
+ SET_FLAG(F_CF);
+ }
+ set_szp_flags_8(d);
+ return d;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u8 dec_byte(u8 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - 1;
+ set_szp_flags_8((u8)res);
+ calc_borrow_chain(8, d, 1, res, 0);
+
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u16 dec_word(u16 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - 1;
+ set_szp_flags_16((u16)res);
+ calc_borrow_chain(16, d, 1, res, 0);
+
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DEC instruction and side effects.
+****************************************************************************/
+u32 dec_long(u32 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d - 1;
+
+ set_szp_flags_32(res);
+ calc_borrow_chain(32, d, 1, res, 0);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u8 inc_byte(u8 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + 1;
+ set_szp_flags_8((u8)res);
+ calc_carry_chain(8, d, 1, res, 0);
+
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u16 inc_word(u16 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + 1;
+ set_szp_flags_16((u16)res);
+ calc_carry_chain(16, d, 1, res, 0);
+
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the INC instruction and side effects.
+****************************************************************************/
+u32 inc_long(u32 d)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d + 1;
+ set_szp_flags_32(res);
+ calc_carry_chain(32, d, 1, res, 0);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u8 or_byte(u8 d, u8 s)
+{
+ u8 res; /* all operands in native machine order */
+
+ res = d | s;
+ no_carry_byte_side_eff(res);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u16 or_word(u16 d, u16 s)
+{
+ u16 res; /* all operands in native machine order */
+
+ res = d | s;
+ no_carry_word_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u32 or_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d | s;
+ no_carry_long_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u8 neg_byte(u8 s)
+{
+ u8 res;
+
+ CONDITIONAL_SET_FLAG(s != 0, F_CF);
+ res = (u8)-s;
+ set_szp_flags_8(res);
+ calc_borrow_chain(8, 0, s, res, 0);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u16 neg_word(u16 s)
+{
+ u16 res;
+
+ CONDITIONAL_SET_FLAG(s != 0, F_CF);
+ res = (u16)-s;
+ set_szp_flags_16((u16)res);
+ calc_borrow_chain(16, 0, s, res, 0);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OR instruction and side effects.
+****************************************************************************/
+u32 neg_long(u32 s)
+{
+ u32 res;
+
+ CONDITIONAL_SET_FLAG(s != 0, F_CF);
+ res = (u32)-s;
+ set_szp_flags_32(res);
+ calc_borrow_chain(32, 0, s, res, 0);
+
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u8 not_byte(u8 s)
+{
+ return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u16 not_word(u16 s)
+{
+ return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the NOT instruction and side effects.
+****************************************************************************/
+u32 not_long(u32 s)
+{
+ return ~s;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u8 rcl_byte(u8 d, u8 s)
+{
+ unsigned int res, cnt, mask, cf;
+
+ /* s is the rotate distance. It varies from 0 - 8. */
+ /* have
+
+ CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0
+
+ want to rotate through the carry by "s" bits. We could
+ loop, but that's inefficient. So the width is 9,
+ and we split into three parts:
+
+ The new carry flag (was B_n)
+ the stuff in B_n-1 .. B_0
+ the stuff in B_7 .. B_n+1
+
+ The new rotate is done mod 9, and given this,
+ for a rotation of n bits (mod 9) the new carry flag is
+ then located n bits from the MSB. The low part is
+ then shifted up cnt bits, and the high part is or'd
+ in. Using CAPS for new values, and lowercase for the
+ original values, this can be expressed as:
+
+ IF n > 0
+ 1) CF <- b_(8-n)
+ 2) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0
+ 3) B_(n-1) <- cf
+ 4) B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1))
+ */
+ res = d;
+ if ((cnt = s % 9) != 0) {
+ /* extract the new CARRY FLAG. */
+ /* CF <- b_(8-n) */
+ cf = (d >> (8 - cnt)) & 0x1;
+
+ /* get the low stuff which rotated
+ into the range B_7 .. B_cnt */
+ /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_0 */
+ /* note that the right hand side done by the mask */
+ res = (d << cnt) & 0xff;
+
+ /* now the high stuff which rotated around
+ into the positions B_cnt-2 .. B_0 */
+ /* B_(n-2) .. B_0 <- b_7 .. b_(8-(n-1)) */
+ /* shift it downward, 7-(n-2) = 9-n positions.
+ and mask off the result before or'ing in.
+ */
+ mask = (1 << (cnt - 1)) - 1;
+ res |= (d >> (9 - cnt)) & mask;
+
+ /* if the carry flag was set, or it in. */
+ if (ACCESS_FLAG(F_CF)) { /* carry flag is set */
+ /* B_(n-1) <- cf */
+ res |= 1 << (cnt - 1);
+ }
+ /* set the new carry flag, based on the variable "cf" */
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ /* OVERFLOW is set *IFF* cnt==1, then it is the
+ xor of CF and the most significant bit. Blecck. */
+ /* parenthesized this expression since it appears to
+ be causing OF to be misset */
+ CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 6) & 0x2)),
+ F_OF);
+
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u16 rcl_word(u16 d, u8 s)
+{
+ unsigned int res, cnt, mask, cf;
+
+ res = d;
+ if ((cnt = s % 17) != 0) {
+ cf = (d >> (16 - cnt)) & 0x1;
+ res = (d << cnt) & 0xffff;
+ mask = (1 << (cnt - 1)) - 1;
+ res |= (d >> (17 - cnt)) & mask;
+ if (ACCESS_FLAG(F_CF)) {
+ res |= 1 << (cnt - 1);
+ }
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 14) & 0x2)),
+ F_OF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCL instruction and side effects.
+****************************************************************************/
+u32 rcl_long(u32 d, u8 s)
+{
+ u32 res, cnt, mask, cf;
+
+ res = d;
+ if ((cnt = s % 33) != 0) {
+ cf = (d >> (32 - cnt)) & 0x1;
+ res = (d << cnt) & 0xffffffff;
+ mask = (1 << (cnt - 1)) - 1;
+ res |= (d >> (33 - cnt)) & mask;
+ if (ACCESS_FLAG(F_CF)) { /* carry flag is set */
+ res |= 1 << (cnt - 1);
+ }
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ CONDITIONAL_SET_FLAG(cnt == 1 && XOR2(cf + ((res >> 30) & 0x2)),
+ F_OF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u8 rcr_byte(u8 d, u8 s)
+{
+ u32 res, cnt;
+ u32 mask, cf, ocf = 0;
+
+ /* rotate right through carry */
+ /*
+ s is the rotate distance. It varies from 0 - 8.
+ d is the byte object rotated.
+
+ have
+
+ CF B_7 B_6 B_5 B_4 B_3 B_2 B_1 B_0
+
+ The new rotate is done mod 9, and given this,
+ for a rotation of n bits (mod 9) the new carry flag is
+ then located n bits from the LSB. The low part is
+ then shifted up cnt bits, and the high part is or'd
+ in. Using CAPS for new values, and lowercase for the
+ original values, this can be expressed as:
+
+ IF n > 0
+ 1) CF <- b_(n-1)
+ 2) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n)
+ 3) B_(8-n) <- cf
+ 4) B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0)
+ */
+ res = d;
+ if ((cnt = s % 9) != 0) {
+ /* extract the new CARRY FLAG. */
+ /* CF <- b_(n-1) */
+ if (cnt == 1) {
+ cf = d & 0x1;
+ /* note hackery here. Access_flag(..) evaluates to either
+ 0 if flag not set
+ non-zero if flag is set.
+ doing access_flag(..) != 0 casts that into either
+ 0..1 in any representation of the flags register
+ (i.e. packed bit array or unpacked.)
+ */
+ ocf = ACCESS_FLAG(F_CF) != 0;
+ } else
+ cf = (d >> (cnt - 1)) & 0x1;
+
+ /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_n */
+ /* note that the right hand side done by the mask
+ This is effectively done by shifting the
+ object to the right. The result must be masked,
+ in case the object came in and was treated
+ as a negative number. Needed??? */
+
+ mask = (1 << (8 - cnt)) - 1;
+ res = (d >> cnt) & mask;
+
+ /* now the high stuff which rotated around
+ into the positions B_cnt-2 .. B_0 */
+ /* B_(7) .. B_(8-(n-1)) <- b_(n-2) .. b_(0) */
+ /* shift it downward, 7-(n-2) = 9-n positions.
+ and mask off the result before or'ing in.
+ */
+ res |= (d << (9 - cnt));
+
+ /* if the carry flag was set, or it in. */
+ if (ACCESS_FLAG(F_CF)) { /* carry flag is set */
+ /* B_(8-n) <- cf */
+ res |= 1 << (8 - cnt);
+ }
+ /* set the new carry flag, based on the variable "cf" */
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ /* OVERFLOW is set *IFF* cnt==1, then it is the
+ xor of CF and the most significant bit. Blecck. */
+ /* parenthesized... */
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 6) & 0x2)),
+ F_OF);
+ }
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u16 rcr_word(u16 d, u8 s)
+{
+ u32 res, cnt;
+ u32 mask, cf, ocf = 0;
+
+ /* rotate right through carry */
+ res = d;
+ if ((cnt = s % 17) != 0) {
+ if (cnt == 1) {
+ cf = d & 0x1;
+ ocf = ACCESS_FLAG(F_CF) != 0;
+ } else
+ cf = (d >> (cnt - 1)) & 0x1;
+ mask = (1 << (16 - cnt)) - 1;
+ res = (d >> cnt) & mask;
+ res |= (d << (17 - cnt));
+ if (ACCESS_FLAG(F_CF)) {
+ res |= 1 << (16 - cnt);
+ }
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 14) & 0x2)),
+ F_OF);
+ }
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the RCR instruction and side effects.
+****************************************************************************/
+u32 rcr_long(u32 d, u8 s)
+{
+ u32 res, cnt;
+ u32 mask, cf, ocf = 0;
+
+ /* rotate right through carry */
+ res = d;
+ if ((cnt = s % 33) != 0) {
+ if (cnt == 1) {
+ cf = d & 0x1;
+ ocf = ACCESS_FLAG(F_CF) != 0;
+ } else
+ cf = (d >> (cnt - 1)) & 0x1;
+ mask = (1 << (32 - cnt)) - 1;
+ res = (d >> cnt) & mask;
+ if (cnt != 1)
+ res |= (d << (33 - cnt));
+ if (ACCESS_FLAG(F_CF)) { /* carry flag is set */
+ res |= 1 << (32 - cnt);
+ }
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(ocf + ((d >> 30) & 0x2)),
+ F_OF);
+ }
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u8 rol_byte(u8 d, u8 s)
+{
+ unsigned int res, cnt, mask;
+
+ /* rotate left */
+ /*
+ s is the rotate distance. It varies from 0 - 8.
+ d is the byte object rotated.
+
+ have
+
+ CF B_7 ... B_0
+
+ The new rotate is done mod 8.
+ Much simpler than the "rcl" or "rcr" operations.
+
+ IF n > 0
+ 1) B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0)
+ 2) B_(n-1) .. B_(0) <- b_(7) .. b_(8-n)
+ */
+ res = d;
+ if ((cnt = s % 8) != 0) {
+ /* B_(7) .. B_(n) <- b_(8-(n+1)) .. b_(0) */
+ res = (d << cnt);
+
+ /* B_(n-1) .. B_(0) <- b_(7) .. b_(8-n) */
+ mask = (1 << cnt) - 1;
+ res |= (d >> (8 - cnt)) & mask;
+
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ /* OVERFLOW is set *IFF* s==1, then it is the
+ xor of CF and the most significant bit. Blecck. */
+ CONDITIONAL_SET_FLAG(s == 1 &&
+ XOR2((res & 0x1) + ((res >> 6) & 0x2)),
+ F_OF);
+ } if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u16 rol_word(u16 d, u8 s)
+{
+ unsigned int res, cnt, mask;
+
+ res = d;
+ if ((cnt = s % 16) != 0) {
+ res = (d << cnt);
+ mask = (1 << cnt) - 1;
+ res |= (d >> (16 - cnt)) & mask;
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ CONDITIONAL_SET_FLAG(s == 1 &&
+ XOR2((res & 0x1) + ((res >> 14) & 0x2)),
+ F_OF);
+ } if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROL instruction and side effects.
+****************************************************************************/
+u32 rol_long(u32 d, u8 s)
+{
+ u32 res, cnt, mask;
+
+ res = d;
+ if ((cnt = s % 32) != 0) {
+ res = (d << cnt);
+ mask = (1 << cnt) - 1;
+ res |= (d >> (32 - cnt)) & mask;
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ CONDITIONAL_SET_FLAG(s == 1 &&
+ XOR2((res & 0x1) + ((res >> 30) & 0x2)),
+ F_OF);
+ } if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x1, F_CF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u8 ror_byte(u8 d, u8 s)
+{
+ unsigned int res, cnt, mask;
+
+ /* rotate right */
+ /*
+ s is the rotate distance. It varies from 0 - 8.
+ d is the byte object rotated.
+
+ have
+
+ B_7 ... B_0
+
+ The rotate is done mod 8.
+
+ IF n > 0
+ 1) B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n)
+ 2) B_(7) .. B_(8-n) <- b_(n-1) .. b_(0)
+ */
+ res = d;
+ if ((cnt = s % 8) != 0) { /* not a typo, do nada if cnt==0 */
+ /* B_(7) .. B_(8-n) <- b_(n-1) .. b_(0) */
+ res = (d << (8 - cnt));
+
+ /* B_(8-(n+1)) .. B_(0) <- b_(7) .. b_(n) */
+ mask = (1 << (8 - cnt)) - 1;
+ res |= (d >> (cnt)) & mask;
+
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x80, F_CF);
+ /* OVERFLOW is set *IFF* s==1, then it is the
+ xor of the two most significant bits. Blecck. */
+ CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 6), F_OF);
+ } else if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x80, F_CF);
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u16 ror_word(u16 d, u8 s)
+{
+ unsigned int res, cnt, mask;
+
+ res = d;
+ if ((cnt = s % 16) != 0) {
+ res = (d << (16 - cnt));
+ mask = (1 << (16 - cnt)) - 1;
+ res |= (d >> (cnt)) & mask;
+ CONDITIONAL_SET_FLAG(res & 0x8000, F_CF);
+ CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 14), F_OF);
+ } else if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x8000, F_CF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the ROR instruction and side effects.
+****************************************************************************/
+u32 ror_long(u32 d, u8 s)
+{
+ u32 res, cnt, mask;
+
+ res = d;
+ if ((cnt = s % 32) != 0) {
+ res = (d << (32 - cnt));
+ mask = (1 << (32 - cnt)) - 1;
+ res |= (d >> (cnt)) & mask;
+ CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF);
+ CONDITIONAL_SET_FLAG(s == 1 && XOR2(res >> 30), F_OF);
+ } else if (s != 0) {
+ /* set the new carry flag, Note that it is the low order
+ bit of the result!!! */
+ CONDITIONAL_SET_FLAG(res & 0x80000000, F_CF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u8 shl_byte(u8 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 8) {
+ cnt = s % 8;
+
+ /* last bit shifted out goes into carry flag */
+ if (cnt > 0) {
+ res = d << cnt;
+ cf = d & (1 << (8 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_8((u8)res);
+ } else {
+ res = (u8) d;
+ }
+
+ if (cnt == 1) {
+ /* Needs simplification. */
+ CONDITIONAL_SET_FLAG(
+ (((res & 0x80) == 0x80) ^
+ (ACCESS_FLAG(F_CF) != 0)),
+ /* was (M.x86.R_FLG&F_CF)==F_CF)), */
+ F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u16 shl_word(u16 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 16) {
+ cnt = s % 16;
+ if (cnt > 0) {
+ res = d << cnt;
+ cf = d & (1 << (16 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_16((u16)res);
+ } else {
+ res = (u16) d;
+ }
+
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(
+ (((res & 0x8000) == 0x8000) ^
+ (ACCESS_FLAG(F_CF) != 0)),
+ F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHL instruction and side effects.
+****************************************************************************/
+u32 shl_long(u32 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 32) {
+ cnt = s % 32;
+ if (cnt > 0) {
+ res = d << cnt;
+ cf = d & (1 << (32 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_32((u32)res);
+ } else {
+ res = d;
+ }
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^
+ (ACCESS_FLAG(F_CF) != 0)), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u8 shr_byte(u8 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 8) {
+ cnt = s % 8;
+ if (cnt > 0) {
+ cf = d & (1 << (cnt - 1));
+ res = d >> cnt;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_8((u8)res);
+ } else {
+ res = (u8) d;
+ }
+
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(res >> 6), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d >> (s-1)) & 0x1, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u16 shr_word(u16 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 16) {
+ cnt = s % 16;
+ if (cnt > 0) {
+ cf = d & (1 << (cnt - 1));
+ res = d >> cnt;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_16((u16)res);
+ } else {
+ res = d;
+ }
+
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHR instruction and side effects.
+****************************************************************************/
+u32 shr_long(u32 d, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 32) {
+ cnt = s % 32;
+ if (cnt > 0) {
+ cf = d & (1 << (cnt - 1));
+ res = d >> cnt;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_32((u32)res);
+ } else {
+ res = d;
+ }
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u8 sar_byte(u8 d, u8 s)
+{
+ unsigned int cnt, res, cf, mask, sf;
+
+ res = d;
+ sf = d & 0x80;
+ cnt = s % 8;
+ if (cnt > 0 && cnt < 8) {
+ mask = (1 << (8 - cnt)) - 1;
+ cf = d & (1 << (cnt - 1));
+ res = (d >> cnt) & mask;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ if (sf) {
+ res |= ~mask;
+ }
+ set_szp_flags_8((u8)res);
+ } else if (cnt >= 8) {
+ if (sf) {
+ res = 0xff;
+ SET_FLAG(F_CF);
+ CLEAR_FLAG(F_ZF);
+ SET_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ }
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u16 sar_word(u16 d, u8 s)
+{
+ unsigned int cnt, res, cf, mask, sf;
+
+ sf = d & 0x8000;
+ cnt = s % 16;
+ res = d;
+ if (cnt > 0 && cnt < 16) {
+ mask = (1 << (16 - cnt)) - 1;
+ cf = d & (1 << (cnt - 1));
+ res = (d >> cnt) & mask;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ if (sf) {
+ res |= ~mask;
+ }
+ set_szp_flags_16((u16)res);
+ } else if (cnt >= 16) {
+ if (sf) {
+ res = 0xffff;
+ SET_FLAG(F_CF);
+ CLEAR_FLAG(F_ZF);
+ SET_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SAR instruction and side effects.
+****************************************************************************/
+u32 sar_long(u32 d, u8 s)
+{
+ u32 cnt, res, cf, mask, sf;
+
+ sf = d & 0x80000000;
+ cnt = s % 32;
+ res = d;
+ if (cnt > 0 && cnt < 32) {
+ mask = (1 << (32 - cnt)) - 1;
+ cf = d & (1 << (cnt - 1));
+ res = (d >> cnt) & mask;
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ if (sf) {
+ res |= ~mask;
+ }
+ set_szp_flags_32(res);
+ } else if (cnt >= 32) {
+ if (sf) {
+ res = 0xffffffff;
+ SET_FLAG(F_CF);
+ CLEAR_FLAG(F_ZF);
+ SET_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHLD instruction and side effects.
+****************************************************************************/
+u16 shld_word (u16 d, u16 fill, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 16) {
+ cnt = s % 16;
+ if (cnt > 0) {
+ res = (d << cnt) | (fill >> (16-cnt));
+ cf = d & (1 << (16 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_16((u16)res);
+ } else {
+ res = d;
+ }
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG((((res & 0x8000) == 0x8000) ^
+ (ACCESS_FLAG(F_CF) != 0)), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d << (s-1)) & 0x8000, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHLD instruction and side effects.
+****************************************************************************/
+u32 shld_long (u32 d, u32 fill, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 32) {
+ cnt = s % 32;
+ if (cnt > 0) {
+ res = (d << cnt) | (fill >> (32-cnt));
+ cf = d & (1 << (32 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_32((u32)res);
+ } else {
+ res = d;
+ }
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG((((res & 0x80000000) == 0x80000000) ^
+ (ACCESS_FLAG(F_CF) != 0)), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CONDITIONAL_SET_FLAG((d << (s-1)) & 0x80000000, F_CF);
+ CLEAR_FLAG(F_OF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_PF);
+ SET_FLAG(F_ZF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHRD instruction and side effects.
+****************************************************************************/
+u16 shrd_word (u16 d, u16 fill, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 16) {
+ cnt = s % 16;
+ if (cnt > 0) {
+ cf = d & (1 << (cnt - 1));
+ res = (d >> cnt) | (fill << (16 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_16((u16)res);
+ } else {
+ res = d;
+ }
+
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(res >> 14), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SHRD instruction and side effects.
+****************************************************************************/
+u32 shrd_long (u32 d, u32 fill, u8 s)
+{
+ unsigned int cnt, res, cf;
+
+ if (s < 32) {
+ cnt = s % 32;
+ if (cnt > 0) {
+ cf = d & (1 << (cnt - 1));
+ res = (d >> cnt) | (fill << (32 - cnt));
+ CONDITIONAL_SET_FLAG(cf, F_CF);
+ set_szp_flags_32((u32)res);
+ } else {
+ res = d;
+ }
+ if (cnt == 1) {
+ CONDITIONAL_SET_FLAG(XOR2(res >> 30), F_OF);
+ } else {
+ CLEAR_FLAG(F_OF);
+ }
+ } else {
+ res = 0;
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ SET_FLAG(F_ZF);
+ CLEAR_FLAG(F_SF);
+ CLEAR_FLAG(F_PF);
+ }
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u8 sbb_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ if (ACCESS_FLAG(F_CF))
+ res = d - s - 1;
+ else
+ res = d - s;
+ set_szp_flags_8((u8)res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x80, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u16 sbb_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ if (ACCESS_FLAG(F_CF))
+ res = d - s - 1;
+ else
+ res = d - s;
+ set_szp_flags_16((u16)res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SBB instruction and side effects.
+****************************************************************************/
+u32 sbb_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ if (ACCESS_FLAG(F_CF))
+ res = d - s - 1;
+ else
+ res = d - s;
+
+ set_szp_flags_32(res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u8 sub_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ res = d - s;
+ set_szp_flags_8((u8)res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x80, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 6), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return (u8)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u16 sub_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ res = d - s;
+ set_szp_flags_16((u16)res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x8000, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 14), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return (u16)res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the SUB instruction and side effects.
+****************************************************************************/
+u32 sub_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+ u32 bc;
+
+ res = d - s;
+ set_szp_flags_32(res);
+
+ /* calculate the borrow chain. See note at top */
+ bc = (res & (~d | s)) | (~d & s);
+ CONDITIONAL_SET_FLAG(bc & 0x80000000, F_CF);
+ CONDITIONAL_SET_FLAG(XOR2(bc >> 30), F_OF);
+ CONDITIONAL_SET_FLAG(bc & 0x8, F_AF);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_byte(u8 d, u8 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d & s;
+
+ CLEAR_FLAG(F_OF);
+ set_szp_flags_8((u8)res);
+ /* AF == dont care */
+ CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_word(u16 d, u16 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d & s;
+
+ CLEAR_FLAG(F_OF);
+ set_szp_flags_16((u16)res);
+ /* AF == dont care */
+ CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the TEST instruction and side effects.
+****************************************************************************/
+void test_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d & s;
+
+ CLEAR_FLAG(F_OF);
+ set_szp_flags_32(res);
+ /* AF == dont care */
+ CLEAR_FLAG(F_CF);
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u8 xor_byte(u8 d, u8 s)
+{
+ u8 res; /* all operands in native machine order */
+
+ res = d ^ s;
+ no_carry_byte_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u16 xor_word(u16 d, u16 s)
+{
+ u16 res; /* all operands in native machine order */
+
+ res = d ^ s;
+ no_carry_word_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the XOR instruction and side effects.
+****************************************************************************/
+u32 xor_long(u32 d, u32 s)
+{
+ u32 res; /* all operands in native machine order */
+
+ res = d ^ s;
+ no_carry_long_side_eff(res);
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_byte(u8 s)
+{
+ s16 res = (s16)((s8)M.x86.R_AL * (s8)s);
+
+ M.x86.R_AX = res;
+ if (((M.x86.R_AL & 0x80) == 0 && M.x86.R_AH == 0x00) ||
+ ((M.x86.R_AL & 0x80) != 0 && M.x86.R_AH == 0xFF)) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_word(u16 s)
+{
+ s32 res = (s16)M.x86.R_AX * (s16)s;
+
+ M.x86.R_AX = (u16)res;
+ M.x86.R_DX = (u16)(res >> 16);
+ if (((M.x86.R_AX & 0x8000) == 0 && M.x86.R_DX == 0x0000) ||
+ ((M.x86.R_AX & 0x8000) != 0 && M.x86.R_DX == 0xFFFF)) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_long_direct(u32 *res_lo, u32* res_hi,u32 d, u32 s)
+{
+#ifdef __HAS_LONG_LONG__
+ s64 res = (s32)d * (s32)s;
+
+ *res_lo = (u32)res;
+ *res_hi = (u32)(res >> 32);
+#else
+ u32 d_lo,d_hi,d_sign;
+ u32 s_lo,s_hi,s_sign;
+ u32 rlo_lo,rlo_hi,rhi_lo;
+
+ if ((d_sign = d & 0x80000000) != 0)
+ d = -d;
+ d_lo = d & 0xFFFF;
+ d_hi = d >> 16;
+ if ((s_sign = s & 0x80000000) != 0)
+ s = -s;
+ s_lo = s & 0xFFFF;
+ s_hi = s >> 16;
+ rlo_lo = d_lo * s_lo;
+ rlo_hi = (d_hi * s_lo + d_lo * s_hi) + (rlo_lo >> 16);
+ rhi_lo = d_hi * s_hi + (rlo_hi >> 16);
+ *res_lo = (rlo_hi << 16) | (rlo_lo & 0xFFFF);
+ *res_hi = rhi_lo;
+ if (d_sign != s_sign) {
+ d = ~*res_lo;
+ s = (((d & 0xFFFF) + 1) >> 16) + (d >> 16);
+ *res_lo = ~*res_lo+1;
+ *res_hi = ~*res_hi+(s >> 16);
+ }
+#endif
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IMUL instruction and side effects.
+****************************************************************************/
+void imul_long(u32 s)
+{
+ imul_long_direct(&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,s);
+ if (((M.x86.R_EAX & 0x80000000) == 0 && M.x86.R_EDX == 0x00000000) ||
+ ((M.x86.R_EAX & 0x80000000) != 0 && M.x86.R_EDX == 0xFFFFFFFF)) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_byte(u8 s)
+{
+ u16 res = (u16)(M.x86.R_AL * s);
+
+ M.x86.R_AX = res;
+ if (M.x86.R_AH == 0) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_word(u16 s)
+{
+ u32 res = M.x86.R_AX * s;
+
+ M.x86.R_AX = (u16)res;
+ M.x86.R_DX = (u16)(res >> 16);
+ if (M.x86.R_DX == 0) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the MUL instruction and side effects.
+****************************************************************************/
+void mul_long(u32 s)
+{
+#ifdef __HAS_LONG_LONG__
+ u64 res = (u32)M.x86.R_EAX * (u32)s;
+
+ M.x86.R_EAX = (u32)res;
+ M.x86.R_EDX = (u32)(res >> 32);
+#else
+ u32 a,a_lo,a_hi;
+ u32 s_lo,s_hi;
+ u32 rlo_lo,rlo_hi,rhi_lo;
+
+ a = M.x86.R_EAX;
+ a_lo = a & 0xFFFF;
+ a_hi = a >> 16;
+ s_lo = s & 0xFFFF;
+ s_hi = s >> 16;
+ rlo_lo = a_lo * s_lo;
+ rlo_hi = (a_hi * s_lo + a_lo * s_hi) + (rlo_lo >> 16);
+ rhi_lo = a_hi * s_hi + (rlo_hi >> 16);
+ M.x86.R_EAX = (rlo_hi << 16) | (rlo_lo & 0xFFFF);
+ M.x86.R_EDX = rhi_lo;
+#endif
+ if (M.x86.R_EDX == 0) {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ } else {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_byte(u8 s)
+{
+ s32 dvd, div, mod;
+
+ dvd = (s16)M.x86.R_AX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (s8)s;
+ mod = dvd % (s8)s;
+ if (abs(div) > 0x7f) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ M.x86.R_AL = (s8) div;
+ M.x86.R_AH = (s8) mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_word(u16 s)
+{
+ s32 dvd, div, mod;
+
+ dvd = (((s32)M.x86.R_DX) << 16) | M.x86.R_AX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (s16)s;
+ mod = dvd % (s16)s;
+ if (abs(div) > 0x7fff) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_SF);
+ CONDITIONAL_SET_FLAG(div == 0, F_ZF);
+ set_parity_flag(mod);
+
+ M.x86.R_AX = (u16)div;
+ M.x86.R_DX = (u16)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IDIV instruction and side effects.
+****************************************************************************/
+void idiv_long(u32 s)
+{
+#ifdef __HAS_LONG_LONG__
+ s64 dvd, div, mod;
+
+ dvd = (((s64)M.x86.R_EDX) << 32) | M.x86.R_EAX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (s32)s;
+ mod = dvd % (s32)s;
+ if (abs(div) > 0x7fffffff) {
+ x86emu_intr_raise(0);
+ return;
+ }
+#else
+ s32 div = 0, mod;
+ s32 h_dvd = M.x86.R_EDX;
+ u32 l_dvd = M.x86.R_EAX;
+ u32 abs_s = s & 0x7FFFFFFF;
+ u32 abs_h_dvd = h_dvd & 0x7FFFFFFF;
+ u32 h_s = abs_s >> 1;
+ u32 l_s = abs_s << 31;
+ int counter = 31;
+ int carry;
+
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ do {
+ div <<= 1;
+ carry = (l_dvd >= l_s) ? 0 : 1;
+
+ if (abs_h_dvd < (h_s + carry)) {
+ h_s >>= 1;
+ l_s = abs_s << (--counter);
+ continue;
+ } else {
+ abs_h_dvd -= (h_s + carry);
+ l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)
+ : (l_dvd - l_s);
+ h_s >>= 1;
+ l_s = abs_s << (--counter);
+ div |= 1;
+ continue;
+ }
+
+ } while (counter > -1);
+ /* overflow */
+ if (abs_h_dvd || (l_dvd > abs_s)) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ /* sign */
+ div |= ((h_dvd & 0x10000000) ^ (s & 0x10000000));
+ mod = l_dvd;
+
+#endif
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_ZF);
+ set_parity_flag(mod);
+
+ M.x86.R_EAX = (u32)div;
+ M.x86.R_EDX = (u32)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_byte(u8 s)
+{
+ u32 dvd, div, mod;
+
+ dvd = M.x86.R_AX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (u8)s;
+ mod = dvd % (u8)s;
+ if (abs(div) > 0xff) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ M.x86.R_AL = (u8)div;
+ M.x86.R_AH = (u8)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_word(u16 s)
+{
+ u32 dvd, div, mod;
+
+ dvd = (((u32)M.x86.R_DX) << 16) | M.x86.R_AX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (u16)s;
+ mod = dvd % (u16)s;
+ if (abs(div) > 0xffff) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_SF);
+ CONDITIONAL_SET_FLAG(div == 0, F_ZF);
+ set_parity_flag(mod);
+
+ M.x86.R_AX = (u16)div;
+ M.x86.R_DX = (u16)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the DIV instruction and side effects.
+****************************************************************************/
+void div_long(u32 s)
+{
+#ifdef __HAS_LONG_LONG__
+ u64 dvd, div, mod;
+
+ dvd = (((u64)M.x86.R_EDX) << 32) | M.x86.R_EAX;
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ div = dvd / (u32)s;
+ mod = dvd % (u32)s;
+ if (abs(div) > 0xffffffff) {
+ x86emu_intr_raise(0);
+ return;
+ }
+#else
+ s32 div = 0, mod;
+ s32 h_dvd = M.x86.R_EDX;
+ u32 l_dvd = M.x86.R_EAX;
+
+ u32 h_s = s;
+ u32 l_s = 0;
+ int counter = 32;
+ int carry;
+
+ if (s == 0) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ do {
+ div <<= 1;
+ carry = (l_dvd >= l_s) ? 0 : 1;
+
+ if (h_dvd < (h_s + carry)) {
+ h_s >>= 1;
+ l_s = s << (--counter);
+ continue;
+ } else {
+ h_dvd -= (h_s + carry);
+ l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)
+ : (l_dvd - l_s);
+ h_s >>= 1;
+ l_s = s << (--counter);
+ div |= 1;
+ continue;
+ }
+
+ } while (counter > -1);
+ /* overflow */
+ if (h_dvd || (l_dvd > s)) {
+ x86emu_intr_raise(0);
+ return;
+ }
+ mod = l_dvd;
+#endif
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_AF);
+ CLEAR_FLAG(F_SF);
+ SET_FLAG(F_ZF);
+ set_parity_flag(mod);
+
+ M.x86.R_EAX = (u32)div;
+ M.x86.R_EDX = (u32)mod;
+}
+
+/****************************************************************************
+REMARKS:
+Implements the IN string instruction and side effects.
+****************************************************************************/
+
+static void single_in(int size)
+{
+ if(size == 1)
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inb)(M.x86.R_DX));
+ else if (size == 2)
+ store_data_word_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inw)(M.x86.R_DX));
+ else
+ store_data_long_abs(M.x86.R_ES, M.x86.R_DI,(*sys_inl)(M.x86.R_DX));
+}
+
+void ins(int size)
+{
+ int inc = size;
+
+ if (ACCESS_FLAG(F_DF)) {
+ inc = -size;
+ }
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* in until CX is ZERO. */
+ u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ?
+ M.x86.R_ECX : M.x86.R_CX);
+
+ while (count--) {
+ single_in(size);
+ M.x86.R_DI += inc;
+ }
+ M.x86.R_CX = 0;
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = 0;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ single_in(size);
+ M.x86.R_DI += inc;
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Implements the OUT string instruction and side effects.
+****************************************************************************/
+
+static void single_out(int size)
+{
+ if(size == 1)
+ (*sys_outb)(M.x86.R_DX,fetch_data_byte_abs(M.x86.R_ES, M.x86.R_SI));
+ else if (size == 2)
+ (*sys_outw)(M.x86.R_DX,fetch_data_word_abs(M.x86.R_ES, M.x86.R_SI));
+ else
+ (*sys_outl)(M.x86.R_DX,fetch_data_long_abs(M.x86.R_ES, M.x86.R_SI));
+}
+
+void outs(int size)
+{
+ int inc = size;
+
+ if (ACCESS_FLAG(F_DF)) {
+ inc = -size;
+ }
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* out until CX is ZERO. */
+ u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ?
+ M.x86.R_ECX : M.x86.R_CX);
+ while (count--) {
+ single_out(size);
+ M.x86.R_SI += inc;
+ }
+ M.x86.R_CX = 0;
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = 0;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ single_out(size);
+ M.x86.R_SI += inc;
+ }
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Address to fetch word from
+
+REMARKS:
+Fetches a word from emulator memory using an absolute address.
+****************************************************************************/
+u16 mem_access_word(int addr)
+{
+DB( if (CHECK_MEM_ACCESS())
+ x86emu_check_mem_access(addr);)
+ return (*sys_rdw)(addr);
+}
+
+/****************************************************************************
+REMARKS:
+Pushes a word onto the stack.
+
+NOTE: Do not inline this, as (*sys_wrX) is already inline!
+****************************************************************************/
+void push_word(u16 w)
+{
+DB( if (CHECK_SP_ACCESS())
+ x86emu_check_sp_access();)
+ M.x86.R_SP -= 2;
+ (*sys_wrw)(((u32)M.x86.R_SS << 4) + M.x86.R_SP, w);
+}
+
+/****************************************************************************
+REMARKS:
+Pushes a long onto the stack.
+
+NOTE: Do not inline this, as (*sys_wrX) is already inline!
+****************************************************************************/
+void push_long(u32 w)
+{
+DB( if (CHECK_SP_ACCESS())
+ x86emu_check_sp_access();)
+ M.x86.R_SP -= 4;
+ (*sys_wrl)(((u32)M.x86.R_SS << 4) + M.x86.R_SP, w);
+}
+
+/****************************************************************************
+REMARKS:
+Pops a word from the stack.
+
+NOTE: Do not inline this, as (*sys_rdX) is already inline!
+****************************************************************************/
+u16 pop_word(void)
+{
+ u16 res;
+
+DB( if (CHECK_SP_ACCESS())
+ x86emu_check_sp_access();)
+ res = (*sys_rdw)(((u32)M.x86.R_SS << 4) + M.x86.R_SP);
+ M.x86.R_SP += 2;
+ return res;
+}
+
+/****************************************************************************
+REMARKS:
+Pops a long from the stack.
+
+NOTE: Do not inline this, as (*sys_rdX) is already inline!
+****************************************************************************/
+u32 pop_long(void)
+{
+ u32 res;
+
+DB( if (CHECK_SP_ACCESS())
+ x86emu_check_sp_access();)
+ res = (*sys_rdl)(((u32)M.x86.R_SS << 4) + M.x86.R_SP);
+ M.x86.R_SP += 4;
+ return res;
+}
+
diff --git a/src/devices/emulator/x86emu/prim_ops.h b/src/devices/emulator/x86emu/prim_ops.h
new file mode 100644
index 0000000000..f9f87eb43c
--- /dev/null
+++ b/src/devices/emulator/x86emu/prim_ops.h
@@ -0,0 +1,231 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for primitive operation functions.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_PRIM_OPS_H
+#define __X86EMU_PRIM_OPS_H
+
+#include "prim_asm.h"
+
+#ifdef __cplusplus
+extern "C" { /* Use "C" linkage when in C++ mode */
+#endif
+
+u16 aaa_word (u16 d);
+u16 aas_word (u16 d);
+u16 aad_word (u16 d);
+u16 aam_word (u8 d);
+u8 adc_byte (u8 d, u8 s);
+u16 adc_word (u16 d, u16 s);
+u32 adc_long (u32 d, u32 s);
+u8 add_byte (u8 d, u8 s);
+u16 add_word (u16 d, u16 s);
+u32 add_long (u32 d, u32 s);
+u8 and_byte (u8 d, u8 s);
+u16 and_word (u16 d, u16 s);
+u32 and_long (u32 d, u32 s);
+u8 cmp_byte (u8 d, u8 s);
+u16 cmp_word (u16 d, u16 s);
+u32 cmp_long (u32 d, u32 s);
+u8 daa_byte (u8 d);
+u8 das_byte (u8 d);
+u8 dec_byte (u8 d);
+u16 dec_word (u16 d);
+u32 dec_long (u32 d);
+u8 inc_byte (u8 d);
+u16 inc_word (u16 d);
+u32 inc_long (u32 d);
+u8 or_byte (u8 d, u8 s);
+u16 or_word (u16 d, u16 s);
+u32 or_long (u32 d, u32 s);
+u8 neg_byte (u8 s);
+u16 neg_word (u16 s);
+u32 neg_long (u32 s);
+u8 not_byte (u8 s);
+u16 not_word (u16 s);
+u32 not_long (u32 s);
+u8 rcl_byte (u8 d, u8 s);
+u16 rcl_word (u16 d, u8 s);
+u32 rcl_long (u32 d, u8 s);
+u8 rcr_byte (u8 d, u8 s);
+u16 rcr_word (u16 d, u8 s);
+u32 rcr_long (u32 d, u8 s);
+u8 rol_byte (u8 d, u8 s);
+u16 rol_word (u16 d, u8 s);
+u32 rol_long (u32 d, u8 s);
+u8 ror_byte (u8 d, u8 s);
+u16 ror_word (u16 d, u8 s);
+u32 ror_long (u32 d, u8 s);
+u8 shl_byte (u8 d, u8 s);
+u16 shl_word (u16 d, u8 s);
+u32 shl_long (u32 d, u8 s);
+u8 shr_byte (u8 d, u8 s);
+u16 shr_word (u16 d, u8 s);
+u32 shr_long (u32 d, u8 s);
+u8 sar_byte (u8 d, u8 s);
+u16 sar_word (u16 d, u8 s);
+u32 sar_long (u32 d, u8 s);
+u16 shld_word (u16 d, u16 fill, u8 s);
+u32 shld_long (u32 d, u32 fill, u8 s);
+u16 shrd_word (u16 d, u16 fill, u8 s);
+u32 shrd_long (u32 d, u32 fill, u8 s);
+u8 sbb_byte (u8 d, u8 s);
+u16 sbb_word (u16 d, u16 s);
+u32 sbb_long (u32 d, u32 s);
+u8 sub_byte (u8 d, u8 s);
+u16 sub_word (u16 d, u16 s);
+u32 sub_long (u32 d, u32 s);
+void test_byte (u8 d, u8 s);
+void test_word (u16 d, u16 s);
+void test_long (u32 d, u32 s);
+u8 xor_byte (u8 d, u8 s);
+u16 xor_word (u16 d, u16 s);
+u32 xor_long (u32 d, u32 s);
+void imul_byte (u8 s);
+void imul_word (u16 s);
+void imul_long (u32 s);
+void imul_long_direct(u32 *res_lo, u32* res_hi,u32 d, u32 s);
+void mul_byte (u8 s);
+void mul_word (u16 s);
+void mul_long (u32 s);
+void idiv_byte (u8 s);
+void idiv_word (u16 s);
+void idiv_long (u32 s);
+void div_byte (u8 s);
+void div_word (u16 s);
+void div_long (u32 s);
+void ins (int size);
+void outs (int size);
+u16 mem_access_word (int addr);
+void push_word (u16 w);
+void push_long (u32 w);
+u16 pop_word (void);
+u32 pop_long (void);
+
+#if defined(__HAVE_INLINE_ASSEMBLER__) && !defined(PRIM_OPS_NO_REDEFINE_ASM)
+
+#define aaa_word(d) aaa_word_asm(&M.x86.R_EFLG,d)
+#define aas_word(d) aas_word_asm(&M.x86.R_EFLG,d)
+#define aad_word(d) aad_word_asm(&M.x86.R_EFLG,d)
+#define aam_word(d) aam_word_asm(&M.x86.R_EFLG,d)
+#define adc_byte(d,s) adc_byte_asm(&M.x86.R_EFLG,d,s)
+#define adc_word(d,s) adc_word_asm(&M.x86.R_EFLG,d,s)
+#define adc_long(d,s) adc_long_asm(&M.x86.R_EFLG,d,s)
+#define add_byte(d,s) add_byte_asm(&M.x86.R_EFLG,d,s)
+#define add_word(d,s) add_word_asm(&M.x86.R_EFLG,d,s)
+#define add_long(d,s) add_long_asm(&M.x86.R_EFLG,d,s)
+#define and_byte(d,s) and_byte_asm(&M.x86.R_EFLG,d,s)
+#define and_word(d,s) and_word_asm(&M.x86.R_EFLG,d,s)
+#define and_long(d,s) and_long_asm(&M.x86.R_EFLG,d,s)
+#define cmp_byte(d,s) cmp_byte_asm(&M.x86.R_EFLG,d,s)
+#define cmp_word(d,s) cmp_word_asm(&M.x86.R_EFLG,d,s)
+#define cmp_long(d,s) cmp_long_asm(&M.x86.R_EFLG,d,s)
+#define daa_byte(d) daa_byte_asm(&M.x86.R_EFLG,d)
+#define das_byte(d) das_byte_asm(&M.x86.R_EFLG,d)
+#define dec_byte(d) dec_byte_asm(&M.x86.R_EFLG,d)
+#define dec_word(d) dec_word_asm(&M.x86.R_EFLG,d)
+#define dec_long(d) dec_long_asm(&M.x86.R_EFLG,d)
+#define inc_byte(d) inc_byte_asm(&M.x86.R_EFLG,d)
+#define inc_word(d) inc_word_asm(&M.x86.R_EFLG,d)
+#define inc_long(d) inc_long_asm(&M.x86.R_EFLG,d)
+#define or_byte(d,s) or_byte_asm(&M.x86.R_EFLG,d,s)
+#define or_word(d,s) or_word_asm(&M.x86.R_EFLG,d,s)
+#define or_long(d,s) or_long_asm(&M.x86.R_EFLG,d,s)
+#define neg_byte(s) neg_byte_asm(&M.x86.R_EFLG,s)
+#define neg_word(s) neg_word_asm(&M.x86.R_EFLG,s)
+#define neg_long(s) neg_long_asm(&M.x86.R_EFLG,s)
+#define not_byte(s) not_byte_asm(&M.x86.R_EFLG,s)
+#define not_word(s) not_word_asm(&M.x86.R_EFLG,s)
+#define not_long(s) not_long_asm(&M.x86.R_EFLG,s)
+#define rcl_byte(d,s) rcl_byte_asm(&M.x86.R_EFLG,d,s)
+#define rcl_word(d,s) rcl_word_asm(&M.x86.R_EFLG,d,s)
+#define rcl_long(d,s) rcl_long_asm(&M.x86.R_EFLG,d,s)
+#define rcr_byte(d,s) rcr_byte_asm(&M.x86.R_EFLG,d,s)
+#define rcr_word(d,s) rcr_word_asm(&M.x86.R_EFLG,d,s)
+#define rcr_long(d,s) rcr_long_asm(&M.x86.R_EFLG,d,s)
+#define rol_byte(d,s) rol_byte_asm(&M.x86.R_EFLG,d,s)
+#define rol_word(d,s) rol_word_asm(&M.x86.R_EFLG,d,s)
+#define rol_long(d,s) rol_long_asm(&M.x86.R_EFLG,d,s)
+#define ror_byte(d,s) ror_byte_asm(&M.x86.R_EFLG,d,s)
+#define ror_word(d,s) ror_word_asm(&M.x86.R_EFLG,d,s)
+#define ror_long(d,s) ror_long_asm(&M.x86.R_EFLG,d,s)
+#define shl_byte(d,s) shl_byte_asm(&M.x86.R_EFLG,d,s)
+#define shl_word(d,s) shl_word_asm(&M.x86.R_EFLG,d,s)
+#define shl_long(d,s) shl_long_asm(&M.x86.R_EFLG,d,s)
+#define shr_byte(d,s) shr_byte_asm(&M.x86.R_EFLG,d,s)
+#define shr_word(d,s) shr_word_asm(&M.x86.R_EFLG,d,s)
+#define shr_long(d,s) shr_long_asm(&M.x86.R_EFLG,d,s)
+#define sar_byte(d,s) sar_byte_asm(&M.x86.R_EFLG,d,s)
+#define sar_word(d,s) sar_word_asm(&M.x86.R_EFLG,d,s)
+#define sar_long(d,s) sar_long_asm(&M.x86.R_EFLG,d,s)
+#define shld_word(d,fill,s) shld_word_asm(&M.x86.R_EFLG,d,fill,s)
+#define shld_long(d,fill,s) shld_long_asm(&M.x86.R_EFLG,d,fill,s)
+#define shrd_word(d,fill,s) shrd_word_asm(&M.x86.R_EFLG,d,fill,s)
+#define shrd_long(d,fill,s) shrd_long_asm(&M.x86.R_EFLG,d,fill,s)
+#define sbb_byte(d,s) sbb_byte_asm(&M.x86.R_EFLG,d,s)
+#define sbb_word(d,s) sbb_word_asm(&M.x86.R_EFLG,d,s)
+#define sbb_long(d,s) sbb_long_asm(&M.x86.R_EFLG,d,s)
+#define sub_byte(d,s) sub_byte_asm(&M.x86.R_EFLG,d,s)
+#define sub_word(d,s) sub_word_asm(&M.x86.R_EFLG,d,s)
+#define sub_long(d,s) sub_long_asm(&M.x86.R_EFLG,d,s)
+#define test_byte(d,s) test_byte_asm(&M.x86.R_EFLG,d,s)
+#define test_word(d,s) test_word_asm(&M.x86.R_EFLG,d,s)
+#define test_long(d,s) test_long_asm(&M.x86.R_EFLG,d,s)
+#define xor_byte(d,s) xor_byte_asm(&M.x86.R_EFLG,d,s)
+#define xor_word(d,s) xor_word_asm(&M.x86.R_EFLG,d,s)
+#define xor_long(d,s) xor_long_asm(&M.x86.R_EFLG,d,s)
+#define imul_byte(s) imul_byte_asm(&M.x86.R_EFLG,&M.x86.R_AX,M.x86.R_AL,s)
+#define imul_word(s) imul_word_asm(&M.x86.R_EFLG,&M.x86.R_AX,&M.x86.R_DX,M.x86.R_AX,s)
+#define imul_long(s) imul_long_asm(&M.x86.R_EFLG,&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,s)
+#define imul_long_direct(res_lo,res_hi,d,s) imul_long_asm(&M.x86.R_EFLG,res_lo,res_hi,d,s)
+#define mul_byte(s) mul_byte_asm(&M.x86.R_EFLG,&M.x86.R_AX,M.x86.R_AL,s)
+#define mul_word(s) mul_word_asm(&M.x86.R_EFLG,&M.x86.R_AX,&M.x86.R_DX,M.x86.R_AX,s)
+#define mul_long(s) mul_long_asm(&M.x86.R_EFLG,&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,s)
+#define idiv_byte(s) idiv_byte_asm(&M.x86.R_EFLG,&M.x86.R_AL,&M.x86.R_AH,M.x86.R_AX,s)
+#define idiv_word(s) idiv_word_asm(&M.x86.R_EFLG,&M.x86.R_AX,&M.x86.R_DX,M.x86.R_AX,M.x86.R_DX,s)
+#define idiv_long(s) idiv_long_asm(&M.x86.R_EFLG,&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,M.x86.R_EDX,s)
+#define div_byte(s) div_byte_asm(&M.x86.R_EFLG,&M.x86.R_AL,&M.x86.R_AH,M.x86.R_AX,s)
+#define div_word(s) div_word_asm(&M.x86.R_EFLG,&M.x86.R_AX,&M.x86.R_DX,M.x86.R_AX,M.x86.R_DX,s)
+#define div_long(s) div_long_asm(&M.x86.R_EFLG,&M.x86.R_EAX,&M.x86.R_EDX,M.x86.R_EAX,M.x86.R_EDX,s)
+
+#endif
+
+#ifdef __cplusplus
+} /* End of "C" linkage for C++ */
+#endif
+
+#endif /* __X86EMU_PRIM_OPS_H */
diff --git a/src/devices/emulator/x86emu/sys.c b/src/devices/emulator/x86emu/sys.c
new file mode 100644
index 0000000000..2b437bff80
--- /dev/null
+++ b/src/devices/emulator/x86emu/sys.c
@@ -0,0 +1,595 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file includes subroutines which are related to
+* programmed I/O and memory access. Included in this module
+* are default functions with limited usefulness. For real
+* uses these functions will most likely be overriden by the
+* user library.
+*
+****************************************************************************/
+/* $XFree86: xc/extras/x86emu/src/x86emu/sys.c,v 1.5 2000/08/23 22:10:01 tsi Exp $ */
+
+#include <x86emu/x86emu.h>
+#include <x86emu/regs.h>
+#include "debug.h"
+#include "prim_ops.h"
+#ifdef LINUXBIOS_VERSION
+#include "arch/io.h"
+#else
+#include <sys/io.h>
+#endif
+
+#ifdef IN_MODULE
+#include "xf86_ansic.h"
+#else
+#include <string.h>
+#endif
+/*------------------------- Global Variables ------------------------------*/
+
+X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */
+X86EMU_intrFuncs _X86EMU_intrTab[256];
+
+/*----------------------------- Implementation ----------------------------*/
+#if defined(__alpha__) || defined(__alpha)
+/* to cope with broken egcs-1.1.2 :-(((( */
+
+/*
+ * inline functions to do unaligned accesses
+ * from linux/include/asm-alpha/unaligned.h
+ */
+
+/*
+ * EGCS 1.1 knows about arbitrary unaligned loads. Define some
+ * packed structures to talk about such things with.
+ */
+
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+struct __una_u64 {
+ unsigned long x __attribute__ ((packed));
+};
+struct __una_u32 {
+ unsigned int x __attribute__ ((packed));
+};
+struct __una_u16 {
+ unsigned short x __attribute__ ((packed));
+};
+#endif
+
+static __inline__ unsigned long ldq_u(unsigned long *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ const struct __una_u64 *ptr = (const struct __una_u64 *) r11;
+ return ptr->x;
+#else
+ unsigned long r1, r2;
+ __asm__("ldq_u %0,%3\n\t" "ldq_u %1,%4\n\t" "extql %0,%2,%0\n\t" "extqh %1,%2,%1":"=&r"(r1),
+ "=&r"
+ (r2)
+ : "r"(r11), "m"(*r11),
+ "m"(*(const unsigned long *) (7 + (char *) r11)));
+ return r1 | r2;
+#endif
+}
+
+static __inline__ unsigned long ldl_u(unsigned int *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ const struct __una_u32 *ptr = (const struct __una_u32 *) r11;
+ return ptr->x;
+#else
+ unsigned long r1, r2;
+ __asm__("ldq_u %0,%3\n\t" "ldq_u %1,%4\n\t" "extll %0,%2,%0\n\t" "extlh %1,%2,%1":"=&r"(r1),
+ "=&r"
+ (r2)
+ : "r"(r11), "m"(*r11),
+ "m"(*(const unsigned long *) (3 + (char *) r11)));
+ return r1 | r2;
+#endif
+}
+
+static __inline__ unsigned long ldw_u(unsigned short *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ const struct __una_u16 *ptr = (const struct __una_u16 *) r11;
+ return ptr->x;
+#else
+ unsigned long r1, r2;
+ __asm__("ldq_u %0,%3\n\t" "ldq_u %1,%4\n\t" "extwl %0,%2,%0\n\t" "extwh %1,%2,%1":"=&r"(r1),
+ "=&r"
+ (r2)
+ : "r"(r11), "m"(*r11),
+ "m"(*(const unsigned long *) (1 + (char *) r11)));
+ return r1 | r2;
+#endif
+}
+
+/*
+ * Elemental unaligned stores
+ */
+
+static __inline__ void stq_u(unsigned long r5, unsigned long *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ struct __una_u64 *ptr = (struct __una_u64 *) r11;
+ ptr->x = r5;
+#else
+ unsigned long r1, r2, r3, r4;
+
+ __asm__("ldq_u %3,%1\n\t" "ldq_u %2,%0\n\t" "insqh %6,%7,%5\n\t" "insql %6,%7,%4\n\t" "mskqh %3,%7,%3\n\t" "mskql %2,%7,%2\n\t" "bis %3,%5,%3\n\t" "bis %2,%4,%2\n\t" "stq_u %3,%1\n\t" "stq_u %2,%0":"=m"(*r11),
+ "=m"(*(unsigned long *) (7 + (char *) r11)),
+ "=&r"(r1), "=&r"(r2), "=&r"(r3), "=&r"(r4)
+ : "r"(r5), "r"(r11));
+#endif
+}
+
+static __inline__ void stl_u(unsigned long r5, unsigned int *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ struct __una_u32 *ptr = (struct __una_u32 *) r11;
+ ptr->x = r5;
+#else
+ unsigned long r1, r2, r3, r4;
+
+ __asm__("ldq_u %3,%1\n\t" "ldq_u %2,%0\n\t" "inslh %6,%7,%5\n\t" "insll %6,%7,%4\n\t" "msklh %3,%7,%3\n\t" "mskll %2,%7,%2\n\t" "bis %3,%5,%3\n\t" "bis %2,%4,%2\n\t" "stq_u %3,%1\n\t" "stq_u %2,%0":"=m"(*r11),
+ "=m"(*(unsigned long *) (3 + (char *) r11)),
+ "=&r"(r1), "=&r"(r2), "=&r"(r3), "=&r"(r4)
+ : "r"(r5), "r"(r11));
+#endif
+}
+
+static __inline__ void stw_u(unsigned long r5, unsigned short *r11)
+{
+#if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
+ struct __una_u16 *ptr = (struct __una_u16 *) r11;
+ ptr->x = r5;
+#else
+ unsigned long r1, r2, r3, r4;
+
+ __asm__("ldq_u %3,%1\n\t" "ldq_u %2,%0\n\t" "inswh %6,%7,%5\n\t" "inswl %6,%7,%4\n\t" "mskwh %3,%7,%3\n\t" "mskwl %2,%7,%2\n\t" "bis %3,%5,%3\n\t" "bis %2,%4,%2\n\t" "stq_u %3,%1\n\t" "stq_u %2,%0":"=m"(*r11),
+ "=m"(*(unsigned long *) (1 + (char *) r11)),
+ "=&r"(r1), "=&r"(r2), "=&r"(r3), "=&r"(r4)
+ : "r"(r5), "r"(r11));
+#endif
+}
+#endif
+
+/* compute a pointer. This replaces code scattered all over the place! */
+u8 *mem_ptr(u32 addr, int size)
+{
+ u8 *retaddr = 0;
+
+ if (addr > M.mem_size - size) {
+ DB(printk("mem_ptr: address %#lx out of range!\n", addr);)
+ HALT_SYS();
+ }
+ /* a or b segment? */
+ /* & with e to clear low-order bit, if it is a or b it will be a */
+#if 0
+ if (((addr & 0xfffe0000) == 0xa0000) && M.abseg) {
+ //printk("It's a0000\n");
+ //addr &= ~0xfffe0000;
+ retaddr = (u8 *) (M.mem_base + addr);
+ //printk("retaddr now 0x%p\n", retaddr);
+ } else
+#endif
+ if (addr < 0x200) {
+ printk("%x:%x updating int vector 0x%x\n",
+ M.x86.R_CS, M.x86.R_IP, addr >> 2);
+
+ retaddr = (u8 *) (M.mem_base + addr);
+ } else {
+ retaddr = (u8 *) (M.mem_base + addr);
+ }
+
+ //printk_debug("%s, %x:%x ask address %x return address %x\n",
+ // __func__, M.x86.R_CS, M.x86.R_IP, addr, retaddr);
+
+ return retaddr;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+
+RETURNS:
+Byte value read from emulator memory.
+
+REMARKS:
+Reads a byte value from the emulator memory.
+****************************************************************************/
+u8 X86API rdb(u32 addr)
+{
+ u8 val;
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 1);
+
+ val = *ptr;
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 1 -> %#x\n", addr, val);)
+ return val;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+
+RETURNS:
+Word value read from emulator memory.
+
+REMARKS:
+Reads a word value from the emulator memory.
+****************************************************************************/
+u16 X86API rdw(u32 addr)
+{
+ u16 val = 0;
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 2);
+
+ if (addr > M.mem_size - 2) {
+ DB(printk("mem_read: address %#lx out of range!\n", (unsigned long) addr);
+ )
+ HALT_SYS();
+ }
+#ifdef __BIG_ENDIAN__
+ if (addr & 0x1) {
+ val = (*ptr | (*(ptr + 1) << 8));
+ } else
+#endif
+#if defined(__alpha__) || defined(__alpha)
+ val = ldw_u((u16 *) (ptr));
+#else
+ val = *(u16 *) (ptr);
+#endif
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 2 -> %#x\n", addr, val);)
+ return val;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+
+RETURNS:
+Long value read from emulator memory.
+REMARKS:
+Reads a long value from the emulator memory.
+****************************************************************************/
+u32 X86API rdl(u32 addr)
+{
+ u32 val = 0;
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 4);
+
+#ifdef __BIG_ENDIAN__
+ if (addr & 0x3) {
+ val = (*(u8 *) (ptr + 0) |
+ (*(u8 *) (ptr + 1) << 8) |
+ (*(u8 *) (ptr + 2) << 16) | (*(u8 *) (ptr + 3) << 24));
+ } else
+#endif
+#if defined(__alpha__) || defined(__alpha)
+ val = ldl_u((u32 *) (ptr));
+#else
+ val = *(u32 *) (ptr);
+#endif
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 4 -> %#x\n", addr, val);)
+ return val;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+val - Value to store
+
+REMARKS:
+Writes a byte value to emulator memory.
+****************************************************************************/
+void X86API wrb(u32 addr, u8 val)
+{
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 1);
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 1 <- %#x\n", addr, val);)
+ *(u8 *) (ptr) = val;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+val - Value to store
+
+REMARKS:
+Writes a word value to emulator memory.
+****************************************************************************/
+void X86API wrw(u32 addr, u16 val)
+{
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 2);
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 2 <- %#x\n", addr, val);)
+#ifdef __BIG_ENDIAN__
+ if (addr & 0x1) {
+ *(u8 *) (ptr + 0) = (val >> 0) & 0xff;
+ *(u8 *) (ptr + 1) = (val >> 8) & 0xff;
+ } else
+#endif
+#if defined(__alpha__) || defined(__alpha)
+ stw_u(val, (u16 *) (ptr));
+#else
+ *(u16 *) (ptr) = val;
+#endif
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - Emulator memory address to read
+val - Value to store
+
+REMARKS:
+Writes a long value to emulator memory.
+****************************************************************************/
+void X86API wrl(u32 addr, u32 val)
+{
+ u8 *ptr;
+
+ ptr = mem_ptr(addr, 4);
+ DB(if (DEBUG_MEM_TRACE())
+ printk("%#08x 4 <- %#x\n", addr, val);)
+#ifdef __BIG_ENDIAN__
+ if (addr & 0x1) {
+ *(u8 *) (ptr + 0) = (val >> 0) & 0xff;
+ *(u8 *) (ptr + 1) = (val >> 8) & 0xff;
+ *(u8 *) (ptr + 2) = (val >> 16) & 0xff;
+ *(u8 *) (ptr + 3) = (val >> 24) & 0xff;
+ } else
+#endif
+#if defined(__alpha__) || defined(__alpha)
+ stl_u(val, (u32 *) (ptr));
+#else
+ *(u32 *) (ptr) = val;
+#endif
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO byte read function. Doesn't perform real inb.
+****************************************************************************/
+static u8 X86API p_inb(X86EMU_pioAddr addr)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("inb %#04x \n", addr);)
+ return inb(addr);
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO word read function. Doesn't perform real inw.
+****************************************************************************/
+static u16 X86API p_inw(X86EMU_pioAddr addr)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("inw %#04x \n", addr);)
+ return inw(addr);
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to read
+RETURN:
+0
+REMARKS:
+Default PIO long read function. Doesn't perform real inl.
+****************************************************************************/
+static u32 X86API p_inl(X86EMU_pioAddr addr)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("inl %#04x \n", addr);)
+ return inl(addr);
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to write
+val - Value to store
+REMARKS:
+Default PIO byte write function. Doesn't perform real outb.
+****************************************************************************/
+static void X86API p_outb(X86EMU_pioAddr addr, u8 val)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("outb %#02x -> %#04x \n", val, addr);)
+ outb(val, addr);
+ return;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to write
+val - Value to store
+REMARKS:
+Default PIO word write function. Doesn't perform real outw.
+****************************************************************************/
+static void X86API p_outw(X86EMU_pioAddr addr, u16 val)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("outw %#04x -> %#04x \n", val, addr);)
+ outw(val, addr);
+ return;
+}
+
+/****************************************************************************
+PARAMETERS:
+addr - PIO address to write
+val - Value to store
+REMARKS:
+Default PIO ;ong write function. Doesn't perform real outl.
+****************************************************************************/
+static void X86API p_outl(X86EMU_pioAddr addr, u32 val)
+{
+ DB(if (DEBUG_IO_TRACE())
+ printk("outl %#08x -> %#04x \n", val, addr);)
+
+ outl(val, addr);
+ return;
+}
+
+/*------------------------- Global Variables ------------------------------*/
+
+u8(X86APIP sys_rdb) (u32 addr) = rdb;
+u16(X86APIP sys_rdw) (u32 addr) = rdw;
+u32(X86APIP sys_rdl) (u32 addr) = rdl;
+void (X86APIP sys_wrb) (u32 addr, u8 val) = wrb;
+void (X86APIP sys_wrw) (u32 addr, u16 val) = wrw;
+void (X86APIP sys_wrl) (u32 addr, u32 val) = wrl;
+u8(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb;
+u16(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw;
+u32(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl;
+void (X86APIP sys_outb) (X86EMU_pioAddr addr, u8 val) = p_outb;
+void (X86APIP sys_outw) (X86EMU_pioAddr addr, u16 val) = p_outw;
+void (X86APIP sys_outl) (X86EMU_pioAddr addr, u32 val) = p_outl;
+
+/*----------------------------- Setup -------------------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+funcs - New memory function pointers to make active
+
+REMARKS:
+This function is used to set the pointers to functions which access
+memory space, allowing the user application to override these functions
+and hook them out as necessary for their application.
+****************************************************************************/
+void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs)
+{
+ sys_rdb = funcs->rdb;
+ sys_rdw = funcs->rdw;
+ sys_rdl = funcs->rdl;
+ sys_wrb = funcs->wrb;
+ sys_wrw = funcs->wrw;
+ sys_wrl = funcs->wrl;
+}
+
+/****************************************************************************
+PARAMETERS:
+funcs - New programmed I/O function pointers to make active
+
+REMARKS:
+This function is used to set the pointers to functions which access
+I/O space, allowing the user application to override these functions
+and hook them out as necessary for their application.
+****************************************************************************/
+void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs)
+{
+ sys_inb = funcs->inb;
+ sys_inw = funcs->inw;
+ sys_inl = funcs->inl;
+ sys_outb = funcs->outb;
+ sys_outw = funcs->outw;
+ sys_outl = funcs->outl;
+}
+
+/****************************************************************************
+PARAMETERS:
+funcs - New interrupt vector table to make active
+
+REMARKS:
+This function is used to set the pointers to functions which handle
+interrupt processing in the emulator, allowing the user application to
+hook interrupts as necessary for their application. Any interrupts that
+are not hooked by the user application, and reflected and handled internally
+in the emulator via the interrupt vector table. This allows the application
+to get control when the code being emulated executes specific software
+interrupts.
+****************************************************************************/
+void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[])
+{
+ int i;
+
+ for (i = 0; i < 256; i++)
+ _X86EMU_intrTab[i] = NULL;
+ if (funcs) {
+ for (i = 0; i < 256; i++)
+ _X86EMU_intrTab[i] = funcs[i];
+ }
+}
+
+/****************************************************************************
+PARAMETERS:
+int - New software interrupt to prepare for
+
+REMARKS:
+This function is used to set up the emulator state to exceute a software
+interrupt. This can be used by the user application code to allow an
+interrupt to be hooked, examined and then reflected back to the emulator
+so that the code in the emulator will continue processing the software
+interrupt as per normal. This essentially allows system code to actively
+hook and handle certain software interrupts as necessary.
+****************************************************************************/
+void X86EMU_prepareForInt(int num)
+{
+ push_word((u16) M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(num * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(num * 4);
+ M.x86.intr = 0;
+}
+
+void X86EMU_setMemBase(void *base, size_t size)
+{
+ M.mem_base = (int) base;
+ M.mem_size = size;
+}
+
+void X86EMU_setabseg(void *abseg)
+{
+ M.abseg = (unsigned long) abseg;
+}
diff --git a/src/devices/emulator/x86emu/validate.c b/src/devices/emulator/x86emu/validate.c
new file mode 100644
index 0000000000..d7b62e5f81
--- /dev/null
+++ b/src/devices/emulator/x86emu/validate.c
@@ -0,0 +1,789 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1991-2004 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: Watcom C 10.6 or later
+* Environment: 32-bit DOS
+* Developer: Kendall Bennett
+*
+* Description: Program to validate the x86 emulator library for
+* correctness. We run the emulator primitive operations
+* functions against the real x86 CPU, and compare the result
+* and flags to ensure correctness.
+*
+* We use inline assembler to compile and build this program.
+*
+****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include "x86emu.h"
+#include "x86emu/prim_asm.h"
+#include "x86emu/prim_ops.h"
+
+/*-------------------------- Implementation -------------------------------*/
+
+#define true 1
+#define false 0
+
+u32 cur_flags_mask = 0;
+
+int flags_are_different(u32 flags1, u32 flags2)
+{
+ return (flags1&cur_flags_mask) != (flags2&cur_flags_mask);
+}
+
+#define ALL_FLAGS (F_CF | F_PF | F_AF | F_ZF | F_SF | F_OF)
+
+#define VAL_START_BINARY(parm_type,res_type,dmax,smax,dincr,sincr) \
+{ \
+ parm_type d,s; \
+ res_type r,r_asm; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < dmax; d += dincr) { \
+ for (s = 0; s < smax; s += sincr) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) {
+
+#define VAL_TEST_BINARY(name) \
+ r_asm = name##_asm(&flags,d,s); \
+ r = name(d,s); \
+ if (r != r_asm || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) {
+
+#define VAL_TEST_BINARY_VOID(name) \
+ name##_asm(&flags,d,s); \
+ name(d,s); \
+ r = r_asm = 0; \
+ if (flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) {
+
+#define VAL_FAIL_BYTE_BYTE_BINARY(name) \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%02X = %-15s(0x%02X,0x%02X), flags = %s -> %s\n", \
+ r, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%02X = %-15s(0x%02X,0x%02X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_FAIL_WORD_WORD_BINARY(name) \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%04X = %-15s(0x%04X,0x%04X), flags = %s -> %s\n", \
+ r, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X = %-15s(0x%04X,0x%04X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_FAIL_LONG_LONG_BINARY(name) \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%08X = %-15s(0x%08X,0x%08X), flags = %s -> %s\n", \
+ r, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%08X = %-15s(0x%08X,0x%08X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_END_BINARY() \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_BYTE_BYTE_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u8,u8,0xFF,0xFF,1,1) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_BYTE_BYTE_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_WORD_WORD_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u16,u16,0xFF00,0xFF00,0x100,0x100) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_WORD_WORD_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_LONG_LONG_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u32,u32,0xFF000000,0xFF000000,0x1000000,0x1000000) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_LONG_LONG_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_VOID_BYTE_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u8,u8,0xFF,0xFF,1,1) \
+ VAL_TEST_BINARY_VOID(name) \
+ VAL_FAIL_BYTE_BYTE_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_VOID_WORD_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u16,u16,0xFF00,0xFF00,0x100,0x100) \
+ VAL_TEST_BINARY_VOID(name) \
+ VAL_FAIL_WORD_WORD_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_VOID_LONG_BINARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u32,u32,0xFF000000,0xFF000000,0x1000000,0x1000000) \
+ VAL_TEST_BINARY_VOID(name) \
+ VAL_FAIL_LONG_LONG_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_BYTE_ROTATE(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u8,u8,0xFF,8,1,1) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_BYTE_BYTE_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_WORD_ROTATE(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u16,u16,0xFF00,16,0x100,1) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_WORD_WORD_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_LONG_ROTATE(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_BINARY(u32,u32,0xFF000000,32,0x1000000,1) \
+ VAL_TEST_BINARY(name) \
+ VAL_FAIL_LONG_LONG_BINARY(name) \
+ VAL_END_BINARY()
+
+#define VAL_START_TERNARY(parm_type,res_type,dmax,smax,dincr,sincr,maxshift)\
+{ \
+ parm_type d,s; \
+ res_type r,r_asm; \
+ u8 shift; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < dmax; d += dincr) { \
+ for (s = 0; s < smax; s += sincr) { \
+ for (shift = 0; shift < maxshift; shift += 1) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) {
+
+#define VAL_TEST_TERNARY(name) \
+ r_asm = name##_asm(&flags,d,s,shift); \
+ r = name(d,s,shift); \
+ if (r != r_asm || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) {
+
+#define VAL_FAIL_WORD_WORD_TERNARY(name) \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%04X = %-15s(0x%04X,0x%04X,%d), flags = %s -> %s\n", \
+ r, #name, d, s, shift, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X = %-15s(0x%04X,0x%04X,%d), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, shift, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_FAIL_LONG_LONG_TERNARY(name) \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%08X = %-15s(0x%08X,0x%08X,%d), flags = %s -> %s\n", \
+ r, #name, d, s, shift, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%08X = %-15s(0x%08X,0x%08X,%d), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, shift, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_END_TERNARY() \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_WORD_ROTATE_DBL(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_TERNARY(u16,u16,0xFF00,0xFF00,0x100,0x100,16) \
+ VAL_TEST_TERNARY(name) \
+ VAL_FAIL_WORD_WORD_TERNARY(name) \
+ VAL_END_TERNARY()
+
+#define VAL_LONG_ROTATE_DBL(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_TERNARY(u32,u32,0xFF000000,0xFF000000,0x1000000,0x1000000,32) \
+ VAL_TEST_TERNARY(name) \
+ VAL_FAIL_LONG_LONG_TERNARY(name) \
+ VAL_END_TERNARY()
+
+#define VAL_START_UNARY(parm_type,max,incr) \
+{ \
+ parm_type d,r,r_asm; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < max; d += incr) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) {
+
+#define VAL_TEST_UNARY(name) \
+ r_asm = name##_asm(&flags,d); \
+ r = name(d); \
+ if (r != r_asm || flags_are_different(M.x86.R_EFLG, flags)) { \
+ failed = true;
+
+#define VAL_FAIL_BYTE_UNARY(name) \
+ printk("fail\n"); \
+ printk("0x%02X = %-15s(0x%02X), flags = %s -> %s\n", \
+ r, #name, d, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%02X = %-15s(0x%02X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_FAIL_WORD_UNARY(name) \
+ printk("fail\n"); \
+ printk("0x%04X = %-15s(0x%04X), flags = %s -> %s\n", \
+ r, #name, d, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X = %-15s(0x%04X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_FAIL_LONG_UNARY(name) \
+ printk("fail\n"); \
+ printk("0x%08X = %-15s(0x%08X), flags = %s -> %s\n", \
+ r, #name, d, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%08X = %-15s(0x%08X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, print_flags(buf1,inflags), print_flags(buf2,flags));
+
+#define VAL_END_UNARY() \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | ALL_FLAGS; \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_BYTE_UNARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_UNARY(u8,0xFF,0x1) \
+ VAL_TEST_UNARY(name) \
+ VAL_FAIL_BYTE_UNARY(name) \
+ VAL_END_UNARY()
+
+#define VAL_WORD_UNARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_UNARY(u16,0xFF00,0x100) \
+ VAL_TEST_UNARY(name) \
+ VAL_FAIL_WORD_UNARY(name) \
+ VAL_END_UNARY()
+
+#define VAL_WORD_BYTE_UNARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_UNARY(u16,0xFF,0x1) \
+ VAL_TEST_UNARY(name) \
+ VAL_FAIL_WORD_UNARY(name) \
+ VAL_END_UNARY()
+
+#define VAL_LONG_UNARY(name) \
+ printk("Validating %s ... ", #name); \
+ VAL_START_UNARY(u32,0xFF000000,0x1000000) \
+ VAL_TEST_UNARY(name) \
+ VAL_FAIL_LONG_UNARY(name) \
+ VAL_END_UNARY()
+
+#define VAL_BYTE_MUL(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u8 d,s; \
+ u16 r,r_asm; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF; d += 1) { \
+ for (s = 0; s < 0xFF; s += 1) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ name##_asm(&flags,&r_asm,d,s); \
+ M.x86.R_AL = d; \
+ name(s); \
+ r = M.x86.R_AX; \
+ if (r != r_asm || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%04X = %-15s(0x%02X,0x%02X), flags = %s -> %s\n", \
+ r, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X = %-15s(0x%02X,0x%02X), flags = %s -> %s\n", \
+ r_asm, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_WORD_MUL(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u16 d,s; \
+ u16 r_lo,r_asm_lo; \
+ u16 r_hi,r_asm_hi; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF00; d += 0x100) { \
+ for (s = 0; s < 0xFF00; s += 0x100) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ name##_asm(&flags,&r_asm_lo,&r_asm_hi,d,s); \
+ M.x86.R_AX = d; \
+ name(s); \
+ r_lo = M.x86.R_AX; \
+ r_hi = M.x86.R_DX; \
+ if (r_lo != r_asm_lo || r_hi != r_asm_hi || flags_are_different(M.x86.R_EFLG, flags))\
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%04X:0x%04X = %-15s(0x%04X,0x%04X), flags = %s -> %s\n", \
+ r_hi,r_lo, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X:0x%04X = %-15s(0x%04X,0x%04X), flags = %s -> %s\n", \
+ r_asm_hi,r_asm_lo, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_LONG_MUL(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u32 d,s; \
+ u32 r_lo,r_asm_lo; \
+ u32 r_hi,r_asm_hi; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF000000; d += 0x1000000) { \
+ for (s = 0; s < 0xFF000000; s += 0x1000000) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ name##_asm(&flags,&r_asm_lo,&r_asm_hi,d,s); \
+ M.x86.R_EAX = d; \
+ name(s); \
+ r_lo = M.x86.R_EAX; \
+ r_hi = M.x86.R_EDX; \
+ if (r_lo != r_asm_lo || r_hi != r_asm_hi || flags_are_different(M.x86.R_EFLG, flags))\
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%08X:0x%08X = %-15s(0x%08X,0x%08X), flags = %s -> %s\n", \
+ r_hi,r_lo, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%08X:0x%08X = %-15s(0x%08X,0x%08X), flags = %s -> %s\n", \
+ r_asm_hi,r_asm_lo, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_BYTE_DIV(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u16 d,s; \
+ u8 r_quot,r_rem,r_asm_quot,r_asm_rem; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF00; d += 0x100) { \
+ for (s = 1; s < 0xFF; s += 1) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ M.x86.intr = 0; \
+ M.x86.R_AX = d; \
+ name(s); \
+ r_quot = M.x86.R_AL; \
+ r_rem = M.x86.R_AH; \
+ if (M.x86.intr & INTR_SYNCH) \
+ continue; \
+ name##_asm(&flags,&r_asm_quot,&r_asm_rem,d,s); \
+ if (r_quot != r_asm_quot || r_rem != r_asm_rem || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%02X:0x%02X = %-15s(0x%04X,0x%02X), flags = %s -> %s\n", \
+ r_quot, r_rem, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%02X:0x%02X = %-15s(0x%04X,0x%02X), flags = %s -> %s\n", \
+ r_asm_quot, r_asm_rem, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_WORD_DIV(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u32 d,s; \
+ u16 r_quot,r_rem,r_asm_quot,r_asm_rem; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF000000; d += 0x1000000) { \
+ for (s = 0x100; s < 0xFF00; s += 0x100) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ M.x86.intr = 0; \
+ M.x86.R_AX = d & 0xFFFF; \
+ M.x86.R_DX = d >> 16; \
+ name(s); \
+ r_quot = M.x86.R_AX; \
+ r_rem = M.x86.R_DX; \
+ if (M.x86.intr & INTR_SYNCH) \
+ continue; \
+ name##_asm(&flags,&r_asm_quot,&r_asm_rem,d & 0xFFFF,d >> 16,s);\
+ if (r_quot != r_asm_quot || r_rem != r_asm_rem || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%04X:0x%04X = %-15s(0x%08X,0x%04X), flags = %s -> %s\n", \
+ r_quot, r_rem, #name, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%04X:0x%04X = %-15s(0x%08X,0x%04X), flags = %s -> %s\n", \
+ r_asm_quot, r_asm_rem, #name"_asm", d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+#define VAL_LONG_DIV(name) \
+ printk("Validating %s ... ", #name); \
+{ \
+ u32 d,s; \
+ u32 r_quot,r_rem,r_asm_quot,r_asm_rem; \
+ u32 flags,inflags; \
+ int f,failed = false; \
+ char buf1[80],buf2[80]; \
+ for (d = 0; d < 0xFF000000; d += 0x1000000) { \
+ for (s = 0x100; s < 0xFF00; s += 0x100) { \
+ M.x86.R_EFLG = inflags = flags = def_flags; \
+ for (f = 0; f < 2; f++) { \
+ M.x86.intr = 0; \
+ M.x86.R_EAX = d; \
+ M.x86.R_EDX = 0; \
+ name(s); \
+ r_quot = M.x86.R_EAX; \
+ r_rem = M.x86.R_EDX; \
+ if (M.x86.intr & INTR_SYNCH) \
+ continue; \
+ name##_asm(&flags,&r_asm_quot,&r_asm_rem,d,0,s); \
+ if (r_quot != r_asm_quot || r_rem != r_asm_rem || flags_are_different(M.x86.R_EFLG, flags)) \
+ failed = true; \
+ if (failed || trace) { \
+ if (failed) \
+ printk("fail\n"); \
+ printk("0x%08X:0x%08X = %-15s(0x%08X:0x%08X,0x%08X), flags = %s -> %s\n", \
+ r_quot, r_rem, #name, 0, d, s, print_flags(buf1,inflags), print_flags(buf2,M.x86.R_EFLG)); \
+ printk("0x%08X:0x%08X = %-15s(0x%08X:0x%08X,0x%08X), flags = %s -> %s\n", \
+ r_asm_quot, r_asm_rem, #name"_asm", 0, d, s, print_flags(buf1,inflags), print_flags(buf2,flags)); \
+ } \
+ M.x86.R_EFLG = inflags = flags = def_flags | (ALL_FLAGS & ~F_OF); \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (failed) \
+ break; \
+ } \
+ if (!failed) \
+ printk("passed\n"); \
+}
+
+void printk(const char *fmt, ...)
+{
+ va_list argptr;
+ va_start(argptr, fmt);
+ vfprintf(stdout, fmt, argptr);
+ fflush(stdout);
+ va_end(argptr);
+}
+
+char * print_flags(char *buf,ulong flags)
+{
+ char *separator = "";
+
+ buf[0] = 0;
+ if (flags & F_CF) {
+ strcat(buf,separator);
+ strcat(buf,"CF");
+ separator = ",";
+ }
+ if (flags & F_PF) {
+ strcat(buf,separator);
+ strcat(buf,"PF");
+ separator = ",";
+ }
+ if (flags & F_AF) {
+ strcat(buf,separator);
+ strcat(buf,"AF");
+ separator = ",";
+ }
+ if (flags & F_ZF) {
+ strcat(buf,separator);
+ strcat(buf,"ZF");
+ separator = ",";
+ }
+ if (flags & F_SF) {
+ strcat(buf,separator);
+ strcat(buf,"SF");
+ separator = ",";
+ }
+ if (flags & F_OF) {
+ strcat(buf,separator);
+ strcat(buf,"OF");
+ separator = ",";
+ }
+ if (separator[0] == 0)
+ strcpy(buf,"None");
+ return buf;
+}
+
+int main(int argc, char *argv[])
+{
+ u32 def_flags;
+ int trace = false;
+
+ if (argc > 1)
+ trace = true;
+ memset(&M, 0, sizeof(M));
+ def_flags = get_flags_asm() & ~ALL_FLAGS;
+
+ cur_flags_mask = F_AF | F_CF;
+ VAL_WORD_UNARY(aaa_word);
+ VAL_WORD_UNARY(aas_word);
+
+ cur_flags_mask = F_SF | F_ZF | F_PF;
+ VAL_WORD_UNARY(aad_word);
+ VAL_WORD_UNARY(aam_word);
+
+ cur_flags_mask = ALL_FLAGS;
+ VAL_BYTE_BYTE_BINARY(adc_byte);
+ VAL_WORD_WORD_BINARY(adc_word);
+ VAL_LONG_LONG_BINARY(adc_long);
+
+ VAL_BYTE_BYTE_BINARY(add_byte);
+ VAL_WORD_WORD_BINARY(add_word);
+ VAL_LONG_LONG_BINARY(add_long);
+
+ cur_flags_mask = ALL_FLAGS & (~F_AF);
+ VAL_BYTE_BYTE_BINARY(and_byte);
+ VAL_WORD_WORD_BINARY(and_word);
+ VAL_LONG_LONG_BINARY(and_long);
+
+ cur_flags_mask = ALL_FLAGS;
+ VAL_BYTE_BYTE_BINARY(cmp_byte);
+ VAL_WORD_WORD_BINARY(cmp_word);
+ VAL_LONG_LONG_BINARY(cmp_long);
+
+ cur_flags_mask = ALL_FLAGS & (~F_OF);
+ VAL_BYTE_UNARY(daa_byte);
+ VAL_BYTE_UNARY(das_byte); // Fails for 0x9A (out of range anyway)
+
+ cur_flags_mask = ALL_FLAGS;
+ VAL_BYTE_UNARY(dec_byte);
+ VAL_WORD_UNARY(dec_word);
+ VAL_LONG_UNARY(dec_long);
+
+ VAL_BYTE_UNARY(inc_byte);
+ VAL_WORD_UNARY(inc_word);
+ VAL_LONG_UNARY(inc_long);
+
+ cur_flags_mask = ALL_FLAGS & (~F_AF);
+ VAL_BYTE_BYTE_BINARY(or_byte);
+ VAL_WORD_WORD_BINARY(or_word);
+ VAL_LONG_LONG_BINARY(or_long);
+
+ cur_flags_mask = ALL_FLAGS;
+ VAL_BYTE_UNARY(neg_byte);
+ VAL_WORD_UNARY(neg_word);
+ VAL_LONG_UNARY(neg_long);
+
+ VAL_BYTE_UNARY(not_byte);
+ VAL_WORD_UNARY(not_word);
+ VAL_LONG_UNARY(not_long);
+
+ cur_flags_mask = ALL_FLAGS & (~F_OF);
+ VAL_BYTE_ROTATE(rcl_byte);
+ VAL_WORD_ROTATE(rcl_word);
+ VAL_LONG_ROTATE(rcl_long);
+
+ VAL_BYTE_ROTATE(rcr_byte);
+ VAL_WORD_ROTATE(rcr_word);
+ VAL_LONG_ROTATE(rcr_long);
+
+ VAL_BYTE_ROTATE(rol_byte);
+ VAL_WORD_ROTATE(rol_word);
+ VAL_LONG_ROTATE(rol_long);
+
+ VAL_BYTE_ROTATE(ror_byte);
+ VAL_WORD_ROTATE(ror_word);
+ VAL_LONG_ROTATE(ror_long);
+
+ cur_flags_mask = ALL_FLAGS & (~(F_AF | F_OF));
+ VAL_BYTE_ROTATE(shl_byte);
+ VAL_WORD_ROTATE(shl_word);
+ VAL_LONG_ROTATE(shl_long);
+
+ VAL_BYTE_ROTATE(shr_byte);
+ VAL_WORD_ROTATE(shr_word);
+ VAL_LONG_ROTATE(shr_long);
+
+ VAL_BYTE_ROTATE(sar_byte);
+ VAL_WORD_ROTATE(sar_word);
+ VAL_LONG_ROTATE(sar_long);
+
+ cur_flags_mask = ALL_FLAGS & (~(F_AF | F_OF));
+ VAL_WORD_ROTATE_DBL(shld_word);
+ VAL_LONG_ROTATE_DBL(shld_long);
+
+ VAL_WORD_ROTATE_DBL(shrd_word);
+ VAL_LONG_ROTATE_DBL(shrd_long);
+
+ cur_flags_mask = ALL_FLAGS;
+ VAL_BYTE_BYTE_BINARY(sbb_byte);
+ VAL_WORD_WORD_BINARY(sbb_word);
+ VAL_LONG_LONG_BINARY(sbb_long);
+
+ VAL_BYTE_BYTE_BINARY(sub_byte);
+ VAL_WORD_WORD_BINARY(sub_word);
+ VAL_LONG_LONG_BINARY(sub_long);
+
+ cur_flags_mask = ALL_FLAGS & (~F_AF);
+ VAL_BYTE_BYTE_BINARY(xor_byte);
+ VAL_WORD_WORD_BINARY(xor_word);
+ VAL_LONG_LONG_BINARY(xor_long);
+
+ VAL_VOID_BYTE_BINARY(test_byte);
+ VAL_VOID_WORD_BINARY(test_word);
+ VAL_VOID_LONG_BINARY(test_long);
+
+ cur_flags_mask = F_CF | F_OF;
+ VAL_BYTE_MUL(imul_byte);
+ VAL_WORD_MUL(imul_word);
+ VAL_LONG_MUL(imul_long);
+
+ VAL_BYTE_MUL(mul_byte);
+ VAL_WORD_MUL(mul_word);
+ VAL_LONG_MUL(mul_long);
+
+ cur_flags_mask = 0;
+ VAL_BYTE_DIV(idiv_byte);
+ VAL_WORD_DIV(idiv_word);
+ VAL_LONG_DIV(idiv_long);
+
+ VAL_BYTE_DIV(div_byte);
+ VAL_WORD_DIV(div_word);
+ VAL_LONG_DIV(div_long);
+
+ return 0;
+}
diff --git a/src/devices/emulator/x86emu/x86emui.h b/src/devices/emulator/x86emu/x86emui.h
new file mode 100644
index 0000000000..044e2cb59e
--- /dev/null
+++ b/src/devices/emulator/x86emu/x86emui.h
@@ -0,0 +1,105 @@
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: Header file for system specific functions. These functions
+* are always compiled and linked in the OS depedent libraries,
+* and never in a binary portable driver.
+*
+****************************************************************************/
+
+/* $XFree86: xc/extras/x86emu/src/x86emu/x86emu/x86emui.h,v 1.4 2001/04/01 13:59:58 tsi Exp $ */
+
+#ifndef __X86EMU_X86EMUI_H
+#define __X86EMU_X86EMUI_H
+
+/* If we are compiling in C++ mode, we can compile some functions as
+ * inline to increase performance (however the code size increases quite
+ * dramatically in this case).
+ */
+
+#if defined(__cplusplus) && !defined(_NO_INLINE)
+#define _INLINE inline
+#else
+#define _INLINE static
+#endif
+
+/* Get rid of unused parameters in C++ compilation mode */
+
+#ifdef __cplusplus
+#define X86EMU_UNUSED(v)
+#else
+#define X86EMU_UNUSED(v) v
+#endif
+
+#include "x86emu/x86emu.h"
+#include "x86emu/regs.h"
+#include "debug.h"
+#include "decode.h"
+#include "ops.h"
+#include "prim_ops.h"
+#include "fpu.h"
+#include "x86emu/fpu_regs.h"
+
+#ifdef IN_MODULE
+#include <xf86_ansic.h>
+#else
+//#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#endif
+/*--------------------------- Inline Functions ----------------------------*/
+
+#ifdef __cplusplus
+extern "C" { /* Use "C" linkage when in C++ mode */
+#endif
+
+extern u8 (X86APIP sys_rdb)(u32 addr);
+extern u16 (X86APIP sys_rdw)(u32 addr);
+extern u32 (X86APIP sys_rdl)(u32 addr);
+extern void (X86APIP sys_wrb)(u32 addr,u8 val);
+extern void (X86APIP sys_wrw)(u32 addr,u16 val);
+extern void (X86APIP sys_wrl)(u32 addr,u32 val);
+
+extern u8 (X86APIP sys_inb)(X86EMU_pioAddr addr);
+extern u16 (X86APIP sys_inw)(X86EMU_pioAddr addr);
+extern u32 (X86APIP sys_inl)(X86EMU_pioAddr addr);
+extern void (X86APIP sys_outb)(X86EMU_pioAddr addr,u8 val);
+extern void (X86APIP sys_outw)(X86EMU_pioAddr addr,u16 val);
+extern void (X86APIP sys_outl)(X86EMU_pioAddr addr,u32 val);
+
+#ifdef __cplusplus
+} /* End of "C" linkage for C++ */
+#endif
+
+#endif /* __X86EMU_X86EMUI_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-21 11:59:05 +0000