diff options
| author | Mike Pavone <pavone@retrodev.com> | 2013-04-20 17:41:07 -0700 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2013-04-20 17:41:07 -0700 |
| commit | 4b15ae46b9597ca32b75748630839e362daed9ed (patch) | |
| tree | f29595a0617e7f4bc009e8d67aca8c39e0f37408 | |
| parent | 9a46382752dfa7330252301f890fd0a8ae5b3614 (diff) | |
Fix muls with a negative immediate source.
| -rw-r--r-- | m68k_to_x86.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/m68k_to_x86.c b/m68k_to_x86.c index c4360c7..e0da24f 100644 --- a/m68k_to_x86.c +++ b/m68k_to_x86.c @@ -3303,8 +3303,7 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) case M68K_MULU: dst = cycles(dst, 70); //TODO: Calculate the actual value based on the value of the <ea> parameter if (src_op.mode == MODE_IMMED) { - //immediate value should already be sign extended to 32-bits - dst = mov_ir(dst, inst->op == M68K_MULU ? (src_op.disp & 0xFFFF) : src_op.disp, SCRATCH1, SZ_D); + dst = mov_ir(dst, inst->op == M68K_MULU ? (src_op.disp & 0xFFFF) : ((src_op.disp & 0x8000) ? src_op.disp | 0xFFFF0000 : src_op.disp), SCRATCH1, SZ_D); } else if (src_op.mode == MODE_REG_DIRECT) { if (inst->op == M68K_MULS) { dst = movsx_rr(dst, src_op.base, SCRATCH1, SZ_W, SZ_D); |