diff options
Diffstat (limited to 'src/device/oprom/x86emu')
| -rw-r--r-- | src/device/oprom/x86emu/LICENSE | 17 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/Makefile.inc | 7 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/debug.c | 434 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/debug.h | 234 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/decode.c | 1149 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/decode.h | 88 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/fpu.c | 951 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/fpu.h | 61 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/ops.c | 5510 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/ops.h | 47 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/ops2.c | 1984 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/prim_asm.h | 971 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/prim_ops.c | 2496 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/prim_ops.h | 232 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/sys.c | 406 | ||||
| -rw-r--r-- | src/device/oprom/x86emu/x86emui.h | 103 |
16 files changed, 14690 insertions, 0 deletions
diff --git a/src/device/oprom/x86emu/LICENSE b/src/device/oprom/x86emu/LICENSE new file mode 100644 index 0000000000..a3ede4a87d --- /dev/null +++ b/src/device/oprom/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/device/oprom/x86emu/Makefile.inc b/src/device/oprom/x86emu/Makefile.inc new file mode 100644 index 0000000000..620e5f8771 --- /dev/null +++ b/src/device/oprom/x86emu/Makefile.inc @@ -0,0 +1,7 @@ +ramstage-y += debug.c +ramstage-y += decode.c +ramstage-y += fpu.c +ramstage-y += ops.c +ramstage-y += ops2.c +ramstage-y += prim_ops.c +ramstage-y += sys.c diff --git a/src/device/oprom/x86emu/debug.c b/src/device/oprom/x86emu/debug.c new file mode 100644 index 0000000000..b3f4b6ebfb --- /dev/null +++ b/src/device/oprom/x86emu/debug.c @@ -0,0 +1,434 @@ +/**************************************************************************** +* +* 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" + +/*----------------------------- Implementation ----------------------------*/ + +#ifdef DEBUG + +static void print_encoded_bytes (u16 s, u16 o); +static void print_decoded_instruction (void); +int parse_line (char *s, int *ps, int *n); + +/* should look something like debug's output. */ +void X86EMU_trace_regs (void) +{ + if (DEBUG_TRACE()) { + if (M.x86.mode & (SYSMODE_PREFIX_DATA | SYSMODE_PREFIX_ADDR)) { + x86emu_dump_xregs(); + } else { + x86emu_dump_regs(); + } + } + if (DEBUG_DECODE() && ! DEBUG_DECODE_NOPRINT()) { + printf("%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! + */ + printf("%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 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 (const 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 (const 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)); + } + printf("%-20s ",buf1); +} + +static void print_decoded_instruction (void) +{ + printf("%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); + printf("%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) { + printf("%04x:%04x ", seg, start); + for (i=start; i< off; i++) + printf(" "); + for ( ; i< end; i++) + printf("%02x ", fetch_data_byte_abs(seg,i)); + printf("\n"); + start = end; + end = start + 16; + } +} + +void x86emu_single_step (void) +{ +#if 0 + 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) { + printf("-"); + 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; + printf("Toggled decoding to %s\n",(noDecode)?"FALSE":"TRUE"); + break; + case 't': + case 0: + done = 1; + break; + } + } +#endif +} + +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); +} + +int parse_line (char *s, int *ps, int *n) +{ +#if 0 + 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; + } +#else + return 0; +#endif +} + +#endif /* DEBUG */ + +void x86emu_dump_regs (void) +{ + printf("\tAX=%04x ", M.x86.R_AX ); + printf("BX=%04x ", M.x86.R_BX ); + printf("CX=%04x ", M.x86.R_CX ); + printf("DX=%04x ", M.x86.R_DX ); + printf("SP=%04x ", M.x86.R_SP ); + printf("BP=%04x ", M.x86.R_BP ); + printf("SI=%04x ", M.x86.R_SI ); + printf("DI=%04x\n", M.x86.R_DI ); + printf("\tDS=%04x ", M.x86.R_DS ); + printf("ES=%04x ", M.x86.R_ES ); + printf("SS=%04x ", M.x86.R_SS ); + printf("CS=%04x ", M.x86.R_CS ); + printf("IP=%04x ", M.x86.R_IP ); + if (ACCESS_FLAG(F_OF)) printf("OV "); /* CHECKED... */ + else printf("NV "); + if (ACCESS_FLAG(F_DF)) printf("DN "); + else printf("UP "); + if (ACCESS_FLAG(F_IF)) printf("EI "); + else printf("DI "); + if (ACCESS_FLAG(F_SF)) printf("NG "); + else printf("PL "); + if (ACCESS_FLAG(F_ZF)) printf("ZR "); + else printf("NZ "); + if (ACCESS_FLAG(F_AF)) printf("AC "); + else printf("NA "); + if (ACCESS_FLAG(F_PF)) printf("PE "); + else printf("PO "); + if (ACCESS_FLAG(F_CF)) printf("CY "); + else printf("NC "); + printf("\n"); +} + +void x86emu_dump_xregs (void) +{ + printf("\tEAX=%08x ", M.x86.R_EAX ); + printf("EBX=%08x ", M.x86.R_EBX ); + printf("ECX=%08x ", M.x86.R_ECX ); + printf("EDX=%08x \n", M.x86.R_EDX ); + printf("\tESP=%08x ", M.x86.R_ESP ); + printf("EBP=%08x ", M.x86.R_EBP ); + printf("ESI=%08x ", M.x86.R_ESI ); + printf("EDI=%08x\n", M.x86.R_EDI ); + printf("\tDS=%04x ", M.x86.R_DS ); + printf("ES=%04x ", M.x86.R_ES ); + printf("SS=%04x ", M.x86.R_SS ); + printf("CS=%04x ", M.x86.R_CS ); + printf("EIP=%08x\n\t", M.x86.R_EIP ); + if (ACCESS_FLAG(F_OF)) printf("OV "); /* CHECKED... */ + else printf("NV "); + if (ACCESS_FLAG(F_DF)) printf("DN "); + else printf("UP "); + if (ACCESS_FLAG(F_IF)) printf("EI "); + else printf("DI "); + if (ACCESS_FLAG(F_SF)) printf("NG "); + else printf("PL "); + if (ACCESS_FLAG(F_ZF)) printf("ZR "); + else printf("NZ "); + if (ACCESS_FLAG(F_AF)) printf("AC "); + else printf("NA "); + if (ACCESS_FLAG(F_PF)) printf("PE "); + else printf("PO "); + if (ACCESS_FLAG(F_CF)) printf("CY "); + else printf("NC "); + printf("\n"); +} diff --git a/src/device/oprom/x86emu/debug.h b/src/device/oprom/x86emu/debug.h new file mode 100644 index 0000000000..1b2c3a3f1c --- /dev/null +++ b/src/device/oprom/x86emu/debug.h @@ -0,0 +1,234 @@ +/**************************************************************************** +* +* 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 + +/*---------------------- Macros and type definitions ----------------------*/ + +#ifdef CONFIG_DEFAULT_CONSOLE_LOGLEVEL +/* printf is not available in coreboot... use printk */ +#define printf(x...) printk(BIOS_DEBUG, x) +#endif + +/* 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_TRACEJMP() (M.x86.debug & DEBUG_TRACEJMP_F) +# define DEBUG_TRACEJMPREGS() (M.x86.debug & DEBUG_TRACEJMP_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_TRACEJMP() 0 +# define DEBUG_TRACEJMPREGS() 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()) \ + printf("%04x:%04x: CALL %s%04x:%04x\n", u , v, s, w, x); +# define RETURN_TRACE(u,v,w,x,s) \ + if (DEBUG_TRACECALLREGS()) \ + x86emu_dump_regs(); \ + if (DEBUG_TRACECALL()) \ + printf("%04x:%04x: RET %s %04x:%04x\n",u,v,s,w,x); +# define JMP_TRACE(u,v,w,x,s) \ + if (DEBUG_TRACEJMPREGS()) \ + x86emu_dump_regs(); \ + if (DEBUG_TRACEJMP()) \ + printf("%04x:%04x: JMP %s%04x:%04x\n", u , v, s, w, x); +#else +# define CALL_TRACE(u,v,w,x,s) +# define RETURN_TRACE(u,v,w,x,s) +# define JMP_TRACE(u,v,w,x,s) +#endif + +#ifdef DEBUG +#define DB(x) x +#else +#define DB(x) +#endif + +#ifdef DEBUG +#define X86EMU_DEBUG_ONLY(x) x +#else +#define X86EMU_DEBUG_ONLY(x) X86EMU_UNUSED(x) +#endif + +/*-------------------------- Function Prototypes --------------------------*/ + +#ifdef __cplusplus +extern "C" { /* Use "C" linkage when in C++ mode */ +#endif + +void x86emu_inc_decoded_inst_len (int x); +void x86emu_decode_printf (const char *x); +void x86emu_decode_printf2 (const char *x, int y); +void x86emu_just_disassemble (void); +void x86emu_single_step (void); +void x86emu_end_instr (void); +void x86emu_dump_regs (void); +void x86emu_dump_xregs (void); +void x86emu_print_int_vect (u16 iv); +void x86emu_instrument_instruction (void); +void x86emu_check_ip_access (void); +void x86emu_check_sp_access (void); +void x86emu_check_mem_access (u32 p); +void x86emu_check_data_access (uint s, uint o); + +void disassemble_forward (u16 seg, u16 off, int n); + +#ifdef __cplusplus +} /* End of "C" linkage for C++ */ +#endif + +#endif /* __X86EMU_DEBUG_H */ diff --git a/src/device/oprom/x86emu/decode.c b/src/device/oprom/x86emu/decode.c new file mode 100644 index 0000000000..ed96dc66e6 --- /dev/null +++ b/src/device/oprom/x86emu/decode.c @@ -0,0 +1,1149 @@ +/**************************************************************************** +* +* 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) +{ + printf("%s, raising exeception %x\n", __func__, intrnum); + x86emu_dump_regs(); + 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) { + printf("halted\n"); + X86EMU_trace_regs(); + } + else { + if (M.x86.debug) + printf("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 + printf("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. +****************************************************************************/ +static 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. +****************************************************************************/ +static 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/device/oprom/x86emu/decode.h b/src/device/oprom/x86emu/decode.h new file mode 100644 index 0000000000..99ed7f6f35 --- /dev/null +++ b/src/device/oprom/x86emu/decode.h @@ -0,0 +1,88 @@ +/**************************************************************************** +* +* 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); +unsigned decode_rmXX_address(int mod, int rm); + +#ifdef __cplusplus +} /* End of "C" linkage for C++ */ +#endif + +#endif /* __X86EMU_DECODE_H */ diff --git a/src/device/oprom/x86emu/fpu.c b/src/device/oprom/x86emu/fpu.c new file mode 100644 index 0000000000..7edebd4244 --- /dev/null +++ b/src/device/oprom/x86emu/fpu.c @@ -0,0 +1,951 @@ +/**************************************************************************** +* +* 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 X86EMU_FPU_PRESENT +#define X86EMU_FPU_ONLY(x) x +#else +#define X86EMU_FPU_ONLY(x) X86EMU_UNUSED(x) +#endif + +#ifdef DEBUG + +static const 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 const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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 + +static const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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 + +static const 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 X86EMU_FPU_ONLY(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 +static const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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 const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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 const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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 const 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 X86EMU_FPU_ONLY(destoffset); + u8 X86EMU_FPU_ONLY(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/device/oprom/x86emu/fpu.h b/src/device/oprom/x86emu/fpu.h new file mode 100644 index 0000000000..5fb271463b --- /dev/null +++ b/src/device/oprom/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/device/oprom/x86emu/ops.c b/src/device/oprom/x86emu/ops.c new file mode 100644 index 0000000000..6917a08162 --- /dev/null +++ b/src/device/oprom/x86emu/ops.c @@ -0,0 +1,5510 @@ +/**************************************************************************** +* +* 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 const 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 const 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. +****************************************************************************/ +static void x86emuOp_illegal_op( + u8 op1) +{ + START_OF_INSTR(); + if (M.x86.R_SP != 0) { + DECODE_PRINTF("ILLEGAL X86 OPCODE\n"); + TRACE_REGS(); + DB( printf("%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 +****************************************************************************/ +static 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); + if (op1 != 7) + 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 +****************************************************************************/ +static 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); + if (op1 != 7) + 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); + if (op1 != 7) + 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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) +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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(); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + push_long(imm); + } else { + push_word(imm); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x6b +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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; + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, " NEAR COND "); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x80 +****************************************************************************/ +static 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(); + *destreg = (*genop_byte_operation[rh]) (*destreg, imm); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x81 +****************************************************************************/ +static 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, imm; + + destreg = DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF(","); + imm = fetch_long_imm(); + DECODE_PRINTF2("%x\n", imm); + TRACE_AND_STEP(); + *destreg = (*genop_long_operation[rh]) (*destreg, imm); + } else { + u16 *destreg, imm; + + destreg = DECODE_RM_WORD_REGISTER(rl); + DECODE_PRINTF(","); + imm = fetch_word_imm(); + DECODE_PRINTF2("%x\n", imm); + TRACE_AND_STEP(); + *destreg = (*genop_word_operation[rh]) (*destreg, imm); + } + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x82 +****************************************************************************/ +static 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(); + *destreg = (*genop_byte_operation[rh]) (*destreg, imm); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x83 +****************************************************************************/ +static 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, imm; + + destreg = DECODE_RM_LONG_REGISTER(rl); + imm = (s8) fetch_byte_imm(); + DECODE_PRINTF2(",%x\n", imm); + TRACE_AND_STEP(); + *destreg = (*genop_long_operation[rh]) (*destreg, imm); + } else { + u16 *destreg, imm; + + destreg = DECODE_RM_WORD_REGISTER(rl); + imm = (s8) fetch_byte_imm(); + DECODE_PRINTF2(",%x\n", imm); + TRACE_AND_STEP(); + *destreg = (*genop_word_operation[rh]) (*destreg, imm); + } + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x84 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1)) +{ + int mod, rl, rh; + uint destoffset; + + START_OF_INSTR(); + DECODE_PRINTF("LEA\t"); + FETCH_DECODE_MODRM(mod, rh, rl); + if (mod < 3) { + if (M.x86.mode & SYSMODE_PREFIX_ADDR) { + u32 *srcreg = DECODE_RM_LONG_REGISTER(rh); + DECODE_PRINTF(","); + destoffset = decode_rmXX_address(mod, rl); + DECODE_PRINTF("\n"); + TRACE_AND_STEP(); + *srcreg = (u32)destoffset; + } else { + u16 *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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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_AX = *reg16; + *reg16 = (u16)tmp; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x98 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_call_far_IMM(u8 X86EMU_UNUSED(op1)) +{ + u32 farseg, faroff; + + START_OF_INSTR(); + DECODE_PRINTF("CALL\t"); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + faroff = fetch_long_imm(); + farseg = fetch_word_imm(); + } else { + 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; + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + push_long(M.x86.R_EIP); + } else { + push_word(M.x86.R_IP); + } + M.x86.R_EIP = faroff & 0xffff; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x9b +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + count = (M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX; + M.x86.R_CX = 0; + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX = 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; + if (M.x86.intr & INTR_HALTED) + break; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xa5 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + count = (M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX; + M.x86.R_CX = 0; + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX = 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; + if (M.x86.intr & INTR_HALTED) + break; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xa6 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + 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; + if (M.x86.intr & INTR_HALTED) + 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + } + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + 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; + if (M.x86.intr & INTR_HALTED) + 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX) != 0) { + store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL); + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_DI += inc; + if (M.x86.intr & INTR_HALTED) + break; + } + 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + count = (M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX; + M.x86.R_CX = 0; + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX = 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; + if (M.x86.intr & INTR_HALTED) + break; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xac +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX) != 0) { + M.x86.R_AL = fetch_data_byte(M.x86.R_SI); + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_SI += inc; + if (M.x86.intr & INTR_HALTED) + break; + } + 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + count = (M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : M.x86.R_CX; + M.x86.R_CX = 0; + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX = 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; + if (M.x86.intr & INTR_HALTED) + break; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xae +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_DI += inc; + if (ACCESS_FLAG(F_ZF) == 0) + break; + if (M.x86.intr & INTR_HALTED) + break; + } + M.x86.mode &= ~SYSMODE_PREFIX_REPE; + } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) { + /* REPNE */ + /* move them until (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_DI += inc; + if (ACCESS_FLAG(F_ZF)) + break; /* zero flag set means equal */ + if (M.x86.intr & INTR_HALTED) + break; + } + 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 +****************************************************************************/ +static 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 (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + } + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_DI += inc; + if (ACCESS_FLAG(F_ZF) == 0) + break; + if (M.x86.intr & INTR_HALTED) + break; + } + M.x86.mode &= ~SYSMODE_PREFIX_REPE; + } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) { + /* REPNE */ + /* move them until (E)CX is ZERO. */ + while (((M.x86.mode & SYSMODE_32BIT_REP) ? M.x86.R_ECX : 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); + } + if (M.x86.mode & SYSMODE_32BIT_REP) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + M.x86.R_DI += inc; + if (ACCESS_FLAG(F_ZF)) + break; /* zero flag set means equal */ + if (M.x86.intr & INTR_HALTED) + break; + } + 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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); + TRACE_AND_STEP(); + M.x86.R_IP = pop_word(); + RETURN_TRACE(M.x86.saved_cs,M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, "NEAR"); + M.x86.R_SP += imm; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xc3 +****************************************************************************/ +static void x86emuOp_ret_near(u8 X86EMU_UNUSED(op1)) +{ + START_OF_INSTR(); + DECODE_PRINTF("RET\n"); + TRACE_AND_STEP(); + M.x86.R_IP = pop_word(); + RETURN_TRACE(M.x86.saved_cs,M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, "NEAR"); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xc4 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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); + TRACE_AND_STEP(); + M.x86.R_IP = pop_word(); + M.x86.R_CS = pop_word(); + RETURN_TRACE(M.x86.saved_cs,M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, "FAR"); + M.x86.R_SP += imm; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xcb +****************************************************************************/ +static void x86emuOp_ret_far(u8 X86EMU_UNUSED(op1)) +{ + START_OF_INSTR(); + DECODE_PRINTF("RETF\n"); + TRACE_AND_STEP(); + M.x86.R_IP = pop_word(); + M.x86.R_CS = pop_word(); + RETURN_TRACE(M.x86.saved_cs,M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, "FAR"); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xcc +****************************************************************************/ +static void x86emuOp_int3(u8 X86EMU_UNUSED(op1)) +{ + u16 X86EMU_UNUSED(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 +****************************************************************************/ +static void x86emuOp_int_IMM(u8 X86EMU_UNUSED(op1)) +{ + u16 X86EMU_UNUSED(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 +****************************************************************************/ +static void x86emuOp_into(u8 X86EMU_UNUSED(op1)) +{ + u16 X86EMU_UNUSED(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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_aad(u8 X86EMU_UNUSED(op1)) +{ + u8 X86EMU_UNUSED(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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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(); + if (M.x86.mode & SYSMODE_PREFIX_ADDR) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + if (((M.x86.mode & SYSMODE_PREFIX_ADDR) ? M.x86.R_ECX : M.x86.R_CX) != 0 && !ACCESS_FLAG(F_ZF)) /* (E)CX != 0 and !ZF */ + M.x86.R_IP = ip; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xe1 +****************************************************************************/ +static 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(); + if (M.x86.mode & SYSMODE_PREFIX_ADDR) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + if (((M.x86.mode & SYSMODE_PREFIX_ADDR) ? M.x86.R_ECX : M.x86.R_CX) != 0 && ACCESS_FLAG(F_ZF)) /* (E)CX != 0 and ZF */ + M.x86.R_IP = ip; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xe2 +****************************************************************************/ +static 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(); + if (M.x86.mode & SYSMODE_PREFIX_ADDR) + M.x86.R_ECX -= 1; + else + M.x86.R_CX -= 1; + if (((M.x86.mode & SYSMODE_PREFIX_ADDR) ? M.x86.R_ECX : M.x86.R_CX) != 0) /* (E)CX != 0 */ + M.x86.R_IP = ip; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xe3 +****************************************************************************/ +static 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; + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, " CXZ "); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xe4 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_call_near_IMM(u8 X86EMU_UNUSED(op1)) +{ + s16 ip16 = 0; /* Initialize to keep GCC silent */ + s32 ip32 = 0; + + START_OF_INSTR(); + DECODE_PRINTF("CALL\t"); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + ip32 = (s32) fetch_long_imm(); + ip32 += (s16) M.x86.R_IP; /* CHECK SIGN */ + DECODE_PRINTF2("%04x\n", (u16)ip32); + CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip32, ""); + } else { + ip16 = (s16) fetch_word_imm(); + ip16 += (s16) M.x86.R_IP; /* CHECK SIGN */ + DECODE_PRINTF2("%04x\n", ip16); + CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip16, ""); + } + TRACE_AND_STEP(); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + push_long(M.x86.R_EIP); + M.x86.R_EIP = ip32 & 0xffff; + } else { + push_word(M.x86.R_IP); + M.x86.R_EIP = ip16; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xe9 +****************************************************************************/ +static void x86emuOp_jump_near_IMM(u8 X86EMU_UNUSED(op1)) +{ + u32 ip; + + START_OF_INSTR(); + DECODE_PRINTF("JMP\t"); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + ip = (u32)fetch_long_imm(); + ip += (u32)M.x86.R_EIP; + DECODE_PRINTF2("%08x\n", (u32)ip); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, " NEAR "); + TRACE_AND_STEP(); + M.x86.R_EIP = (u32)ip; + } else { + ip = (s16)fetch_word_imm(); + ip += (s16)M.x86.R_IP; + DECODE_PRINTF2("%04x\n", (u16)ip); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, " NEAR "); + TRACE_AND_STEP(); + M.x86.R_IP = (u16)ip; + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xea +****************************************************************************/ +static void x86emuOp_jump_far_IMM(u8 X86EMU_UNUSED(op1)) +{ + u16 cs; + u32 ip; + + START_OF_INSTR(); + DECODE_PRINTF("JMP\tFAR "); + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + ip = fetch_long_imm(); + } else { + ip = fetch_word_imm(); + } + cs = fetch_word_imm(); + DECODE_PRINTF2("%04x:", cs); + DECODE_PRINTF2("%04x\n", ip); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, cs, ip, " FAR "); + TRACE_AND_STEP(); + M.x86.R_EIP = ip & 0xffff; + M.x86.R_CS = cs; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xeb +****************************************************************************/ +static 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); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, target, " BYTE "); + TRACE_AND_STEP(); + M.x86.R_IP = target; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xec +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_repne(u8 X86EMU_UNUSED(op1)) +{ + START_OF_INSTR(); + DECODE_PRINTF("REPNE\n"); + TRACE_AND_STEP(); + M.x86.mode |= SYSMODE_PREFIX_REPNE; + if (M.x86.mode & SYSMODE_PREFIX_ADDR) + M.x86.mode |= SYSMODE_32BIT_REP; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xf3 +****************************************************************************/ +static void x86emuOp_repe(u8 X86EMU_UNUSED(op1)) +{ + START_OF_INSTR(); + DECODE_PRINTF("REPE\n"); + TRACE_AND_STEP(); + M.x86.mode |= SYSMODE_PREFIX_REPE; + if (M.x86.mode & SYSMODE_PREFIX_ADDR) + M.x86.mode |= SYSMODE_32BIT_REP; + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0xf4 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1)) +{ + int mod, rh, rl; + uint destoffset = 0; + u16 *destreg; + u32 *destreg32; + u16 destval,destval2; + u32 destval32; + + /* 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) { + destval32 = fetch_data_long(destoffset); + TRACE_AND_STEP(); + destval32 = inc_long(destval32); + store_data_long(destoffset, destval32); + } else { + 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) { + destval32 = fetch_data_long(destoffset); + TRACE_AND_STEP(); + destval32 = dec_long(destval32); + store_data_long(destoffset, destval32); + } else { + 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); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, destval, " WORD "); + 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); + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, destval2, destval, " FAR "); + 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) { + destval32 = fetch_data_long(destoffset); + TRACE_AND_STEP(); + push_long(destval32); + } else { + destval = fetch_data_word(destoffset); + TRACE_AND_STEP(); + push_word(destval); + } + break; + } + } else { + switch (rh) { + case 0: + if (M.x86.mode & SYSMODE_PREFIX_DATA) { + destreg32 = DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF("\n"); + TRACE_AND_STEP(); + *destreg32 = inc_long(*destreg32); + } else { + 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) { + destreg32 = DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF("\n"); + TRACE_AND_STEP(); + *destreg32 = dec_long(*destreg32); + } else { + 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) { + destreg32 = DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF("\n"); + TRACE_AND_STEP(); + push_long(*destreg32); + } else { + 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/device/oprom/x86emu/ops.h b/src/device/oprom/x86emu/ops.h new file mode 100644 index 0000000000..825b9eadd1 --- /dev/null +++ b/src/device/oprom/x86emu/ops.h @@ -0,0 +1,47 @@ +/**************************************************************************** +* +* 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); + +int x86emu_check_jump_condition(u8 op); + +#endif /* __X86EMU_OPS_H */ diff --git a/src/device/oprom/x86emu/ops2.c b/src/device/oprom/x86emu/ops2.c new file mode 100644 index 0000000000..95ec09a317 --- /dev/null +++ b/src/device/oprom/x86emu/ops2.c @@ -0,0 +1,1984 @@ +/**************************************************************************** +* +* 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. +****************************************************************************/ +static void x86emuOp2_illegal_op(u8 op2) +{ + START_OF_INSTR(); + DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n"); + TRACE_REGS(); + printf("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n", + M.x86.R_CS, M.x86.R_IP-2, op2); + HALT_SYS(); + END_OF_INSTR(); +} + +/**************************************************************************** + * REMARKS: + * Handles opcode 0x0f,0x01 + * ****************************************************************************/ + +static void x86emuOp2_opc_01(u8 op2) +{ + int mod, rl, rh; + u16 *destreg; + uint destoffset; + + START_OF_INSTR(); + FETCH_DECODE_MODRM(mod, rh, rl); + + switch(rh) { + case 4: // SMSW (Store Machine Status Word) + // Decode the mod byte to find the addressing + // Dummy implementation: Always returns 0x10 (initial value as per intel manual volume 3, figure 8-1) +#define SMSW_INITIAL_VALUE 0x10 + DECODE_PRINTF("SMSW\t"); + switch (mod) { + case 0: + destoffset = decode_rm00_address(rl); + store_data_word(destoffset, SMSW_INITIAL_VALUE); + break; + case 1: + destoffset = decode_rm01_address(rl); + store_data_word(destoffset, SMSW_INITIAL_VALUE); + break; + case 2: + destoffset = decode_rm10_address(rl); + store_data_word(destoffset, SMSW_INITIAL_VALUE); + break; + case 3: + destreg = DECODE_RM_WORD_REGISTER(rl); + *destreg = SMSW_INITIAL_VALUE; + break; + } + TRACE_AND_STEP(); + DECODE_CLEAR_SEGOVR(); + DECODE_PRINTF("\n"); + break; + default: + DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE IN 0F 01\n"); + TRACE_REGS(); + printf("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n", + M.x86.R_CS, M.x86.R_IP-2, op2); + HALT_SYS(); + break; + } + + END_OF_INSTR(); +} + +/**************************************************************************** + * REMARKS: + * Handles opcode 0x0f,0x08 + * ****************************************************************************/ +static void x86emuOp2_invd(u8 op2) +{ + START_OF_INSTR(); + DECODE_PRINTF("INVD\n"); + TRACE_AND_STEP(); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** + * REMARKS: + * Handles opcode 0x0f,0x09 + * ****************************************************************************/ +static void x86emuOp2_wbinvd(u8 op2) +{ + START_OF_INSTR(); + DECODE_PRINTF("WBINVD\n"); + TRACE_AND_STEP(); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** + * REMARKS: + * Handles opcode 0x0f,0x30 + * ****************************************************************************/ +static void x86emuOp2_wrmsr(u8 op2) +{ + /* dummy implementation, does nothing */ + + START_OF_INSTR(); + DECODE_PRINTF("WRMSR\n"); + TRACE_AND_STEP(); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0x31 +****************************************************************************/ +static void x86emuOp2_rdtsc(u8 X86EMU_UNUSED(op2)) +{ +#ifdef __HAS_LONG_LONG__ + static u64 counter = 0; +#else + static u32 counter = 0; +#endif + + counter += 0x10000; + + /* read timestamp counter */ + /* + * Note that instead of actually trying to accurately measure this, we just + * increase the counter by a fixed amount every time we hit one of these + * instructions. Feel free to come up with a better method. + */ + START_OF_INSTR(); + DECODE_PRINTF("RDTSC\n"); + TRACE_AND_STEP(); +#ifdef __HAS_LONG_LONG__ + M.x86.R_EAX = counter & 0xffffffff; + M.x86.R_EDX = counter >> 32; +#else + M.x86.R_EAX = counter; + M.x86.R_EDX = 0; +#endif + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** + * REMARKS: + * Handles opcode 0x0f,0x32 + * ****************************************************************************/ +static void x86emuOp2_rdmsr(u8 op2) +{ + /* dummy implementation, always return 0 */ + + START_OF_INSTR(); + DECODE_PRINTF("RDMSR\n"); + TRACE_AND_STEP(); + M.x86.R_EDX = 0; + M.x86.R_EAX = 0; + DECODE_CLEAR_SEGOVR(); + 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)); + } +} + +static 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; + JMP_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, M.x86.R_IP, " LONG COND "); + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0xC8-0xCF +****************************************************************************/ +static s32 x86emu_bswap(s32 reg) +{ + // perform the byte swap + s32 temp = reg; + reg = (temp & 0xFF000000) >> 24 | + (temp & 0xFF0000) >> 8 | + (temp & 0xFF00) << 8 | + (temp & 0xFF) << 24; + return reg; +} + +static void x86emuOp2_bswap(u8 op2) +{ + /* byte swap 32 bit register */ + START_OF_INSTR(); + DECODE_PRINTF("BSWAP\t"); + switch (op2) { + case 0xc8: + DECODE_PRINTF("EAX\n"); + M.x86.R_EAX = x86emu_bswap(M.x86.R_EAX); + break; + case 0xc9: + DECODE_PRINTF("ECX\n"); + M.x86.R_ECX = x86emu_bswap(M.x86.R_ECX); + break; + case 0xca: + DECODE_PRINTF("EDX\n"); + M.x86.R_EDX = x86emu_bswap(M.x86.R_EDX); + break; + case 0xcb: + DECODE_PRINTF("EBX\n"); + M.x86.R_EBX = x86emu_bswap(M.x86.R_EBX); + break; + case 0xcc: + DECODE_PRINTF("ESP\n"); + M.x86.R_ESP = x86emu_bswap(M.x86.R_ESP); + break; + case 0xcd: + DECODE_PRINTF("EBP\n"); + M.x86.R_EBP = x86emu_bswap(M.x86.R_EBP); + break; + case 0xce: + DECODE_PRINTF("ESI\n"); + M.x86.R_ESI = x86emu_bswap(M.x86.R_ESI); + break; + case 0xcf: + DECODE_PRINTF("EDI\n"); + M.x86.R_EDI = x86emu_bswap(M.x86.R_EDI); + break; + } + TRACE_AND_STEP(); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0x90-0x9F +****************************************************************************/ +static void x86emuOp2_set_byte(u8 op2) +{ + int mod, rl, rh; + uint destoffset; + u8 *destreg; + const char *X86EMU_DEBUG_ONLY(name) = NULL; + 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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: CPUID takes EAX/ECX as inputs, writes EAX/EBX/ECX/EDX as output +Handles opcode 0x0f,0xa2 +****************************************************************************/ +static void x86emuOp2_cpuid(u8 X86EMU_UNUSED(op2)) +{ + START_OF_INSTR(); + DECODE_PRINTF("CPUID\n"); + TRACE_AND_STEP(); + x86emu_cpuid(); + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0xa3 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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,0xab +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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 +****************************************************************************/ +static 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(); + printf("%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 +****************************************************************************/ +static 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 +****************************************************************************/ +static void x86emuOp2_bsf(u8 X86EMU_UNUSED(op2)) +{ + int mod, rl, rh; + uint srcoffset; + + START_OF_INSTR(); + DECODE_PRINTF("BSF\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, *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 srcval, *dstreg; + + srcval = *DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF(","); + dstreg = DECODE_RM_LONG_REGISTER(rh); + TRACE_AND_STEP(); + CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); + for(*dstreg = 0; *dstreg < 32; (*dstreg)++) + if ((srcval >> *dstreg) & 1) break; + } else { + u16 srcval, *dstreg; + + srcval = *DECODE_RM_WORD_REGISTER(rl); + DECODE_PRINTF(","); + dstreg = DECODE_RM_WORD_REGISTER(rh); + TRACE_AND_STEP(); + CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); + for(*dstreg = 0; *dstreg < 16; (*dstreg)++) + if ((srcval >> *dstreg) & 1) break; + } + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0xbd +****************************************************************************/ +static void x86emuOp2_bsr(u8 X86EMU_UNUSED(op2)) +{ + int mod, rl, rh; + uint srcoffset; + + START_OF_INSTR(); + DECODE_PRINTF("BSR\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, *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 srcval, *dstreg; + + srcval = *DECODE_RM_LONG_REGISTER(rl); + DECODE_PRINTF(","); + dstreg = DECODE_RM_LONG_REGISTER(rh); + TRACE_AND_STEP(); + CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); + for(*dstreg = 31; *dstreg > 0; (*dstreg)--) + if ((srcval >> *dstreg) & 1) break; + } else { + u16 srcval, *dstreg; + + srcval = *DECODE_RM_WORD_REGISTER(rl); + DECODE_PRINTF(","); + dstreg = DECODE_RM_WORD_REGISTER(rh); + TRACE_AND_STEP(); + CONDITIONAL_SET_FLAG(srcval == 0, F_ZF); + for(*dstreg = 15; *dstreg > 0; (*dstreg)--) + if ((srcval >> *dstreg) & 1) break; + } + } + DECODE_CLEAR_SEGOVR(); + END_OF_INSTR(); +} + +/**************************************************************************** +REMARKS: +Handles opcode 0x0f,0xbe +****************************************************************************/ +static 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 +****************************************************************************/ +static 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_opc_01, /* 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_invd, /* invd (ring 0 PM) */ +/* 0x09 */ x86emuOp2_wbinvd, /* 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_wrmsr, +/* 0x31 */ x86emuOp2_rdtsc, +/* 0x32 */ x86emuOp2_rdmsr, +/* 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_cpuid, +/* 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_bts_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_bswap, +/* 0xc9 */ x86emuOp2_bswap, +/* 0xca */ x86emuOp2_bswap, +/* 0xcb */ x86emuOp2_bswap, +/* 0xcc */ x86emuOp2_bswap, +/* 0xcd */ x86emuOp2_bswap, +/* 0xce */ x86emuOp2_bswap, +/* 0xcf */ x86emuOp2_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/device/oprom/x86emu/prim_asm.h b/src/device/oprom/x86emu/prim_asm.h new file mode 100644 index 0000000000..4fa8d55034 --- /dev/null +++ b/src/device/oprom/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/device/oprom/x86emu/prim_ops.c b/src/device/oprom/x86emu/prim_ops.c new file mode 100644 index 0000000000..20e75978e5 --- /dev/null +++ b/src/device/oprom/x86emu/prim_ops.c @@ -0,0 +1,2496 @@ +/**************************************************************************** +* +* 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) ({ \ + int __x = (x); \ + (__x < 0) ? -__x : __x; \ + }) + +#define labs(x) ({ \ + long __x = (x); \ + (__x < 0) ? -__x : __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 = (s64)(s32)d * (s64)(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 = (u64)M.x86.R_EAX * 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 (E)CX is ZERO. */ + u32 count = ((M.x86.mode & SYSMODE_32BIT_REP) ? + 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_32BIT_REP) { + 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 (E)CX is ZERO. */ + u32 count = ((M.x86.mode & SYSMODE_32BIT_REP) ? + 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_32BIT_REP) { + 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; +} + +/**************************************************************************** +REMARKS: +CPUID takes EAX/ECX as inputs, writes EAX/EBX/ECX/EDX as output +****************************************************************************/ +void x86emu_cpuid(void) +{ + u32 feature = M.x86.R_EAX; + + switch (feature) { + case 0: + /* Regardless if we have real data from the hardware, the emulator + * will only support upto feature 1, which we set in register EAX. + * Registers EBX:EDX:ECX contain a string identifying the CPU. + */ + M.x86.R_EAX = 1; + /* EBX:EDX:ECX = "GenuineIntel" */ + M.x86.R_EBX = 0x756e6547; + M.x86.R_EDX = 0x49656e69; + M.x86.R_ECX = 0x6c65746e; + break; + case 1: + /* If we don't have x86 compatible hardware, we return values from an + * Intel 486dx4; which was one of the first processors to have CPUID. + */ + M.x86.R_EAX = 0x00000480; + M.x86.R_EBX = 0x00000000; + M.x86.R_ECX = 0x00000000; + M.x86.R_EDX = 0x00000002; /* VME */ + /* In the case that we have hardware CPUID instruction, we make sure + * that the features reported are limited to TSC and VME. + */ + M.x86.R_EDX &= 0x00000012; + break; + default: + /* Finally, we don't support any additional features. Most CPUs + * return all zeros when queried for invalid or unsupported feature + * numbers. + */ + M.x86.R_EAX = 0; + M.x86.R_EBX = 0; + M.x86.R_ECX = 0; + M.x86.R_EDX = 0; + break; + } +} + diff --git a/src/device/oprom/x86emu/prim_ops.h b/src/device/oprom/x86emu/prim_ops.h new file mode 100644 index 0000000000..7230a71e5d --- /dev/null +++ b/src/device/oprom/x86emu/prim_ops.h @@ -0,0 +1,232 @@ +/**************************************************************************** +* +* 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); +void x86emu_cpuid (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/device/oprom/x86emu/sys.c b/src/device/oprom/x86emu/sys.c new file mode 100644 index 0000000000..7a9e3921ec --- /dev/null +++ b/src/device/oprom/x86emu/sys.c @@ -0,0 +1,406 @@ +/**************************************************************************** +* +* 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 <arch/io.h> +#include <x86emu/x86emu.h> +#include <x86emu/regs.h> +#include "debug.h" +#include "prim_ops.h" + +#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 ----------------------------*/ + +/* compute a pointer. This replaces code scattered all over the place! */ +static u8 *mem_ptr(u32 addr, int size) +{ + u8 *retaddr = 0; + + if (addr > M.mem_size - size) { + DB(printf("mem_ptr: address %#x out of range!\n", addr);) + HALT_SYS(); + } + if (addr < 0x200) { + //printf("%x:%x updating int vector 0x%x\n", + // M.x86.R_CS, M.x86.R_IP, addr >> 2); + } + retaddr = (u8 *) (M.mem_base + addr); + + 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()) + printf("%#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); + val = *(u16 *) (ptr); + + DB(if (DEBUG_MEM_TRACE()) + printf("%#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); + val = *(u32 *) (ptr); + + DB(if (DEBUG_MEM_TRACE()) + printf("%#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); + *(u8 *) (ptr) = val; + + DB(if (DEBUG_MEM_TRACE()) + printf("%#08x 1 <- %#x\n", addr, 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); + *(u16 *) (ptr) = val; + + DB(if (DEBUG_MEM_TRACE()) + printf("%#08x 2 <- %#x\n", addr, val);) +} + +/**************************************************************************** +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); + *(u32 *) (ptr) = val; + + DB(if (DEBUG_MEM_TRACE()) + printf("%#08x 4 <- %#x\n", addr, val);) + + +} + +/**************************************************************************** +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()) + printf("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()) + printf("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()) + printf("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()) + printf("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()) + printf("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()) + printf("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 = (unsigned long) base; + M.mem_size = size; +} diff --git a/src/device/oprom/x86emu/x86emui.h b/src/device/oprom/x86emu/x86emui.h new file mode 100644 index 0000000000..e34a1bad30 --- /dev/null +++ b/src/device/oprom/x86emu/x86emui.h @@ -0,0 +1,103 @@ +/**************************************************************************** +* +* 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 __attribute__((unused)) +#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 <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 */ |