diff options
Diffstat (limited to 'src/devices/emulator/x86emu/prim_ops.c')
| -rw-r--r-- | src/devices/emulator/x86emu/prim_ops.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/src/devices/emulator/x86emu/prim_ops.c b/src/devices/emulator/x86emu/prim_ops.c index fa19cb4844..a4a46a20ee 100644 --- a/src/devices/emulator/x86emu/prim_ops.c +++ b/src/devices/emulator/x86emu/prim_ops.c @@ -1921,7 +1921,7 @@ 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)d * (s64)s; + s64 res = (s64)(s32)d * (s64)(s32)s; *res_lo = (u32)res; *res_hi = (u32)(res >> 32); @@ -2013,7 +2013,7 @@ Implements the MUL instruction and side effects. void mul_long(u32 s) { #ifdef __HAS_LONG_LONG__ - u64 res = (u32)M.x86.R_EAX * (u32)s; + u64 res = (u64)M.x86.R_EAX * s; M.x86.R_EAX = (u32)res; M.x86.R_EDX = (u32)(res >> 32); @@ -2312,16 +2312,15 @@ void ins(int size) } if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { /* dont care whether REPE or REPNE */ - /* in until CX is ZERO. */ - u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ? + /* 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_PREFIX_DATA) { + if (M.x86.mode & SYSMODE_32BIT_REP) { M.x86.R_ECX = 0; } M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); @@ -2355,15 +2354,15 @@ void outs(int size) } if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) { /* dont care whether REPE or REPNE */ - /* out until CX is ZERO. */ - u32 count = ((M.x86.mode & SYSMODE_PREFIX_DATA) ? + /* 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_PREFIX_DATA) { + if (M.x86.mode & SYSMODE_32BIT_REP) { M.x86.R_ECX = 0; } M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE); |