diff options
Diffstat (limited to 'src/devices/oprom/x86emu/ops.c')
| -rw-r--r-- | src/devices/oprom/x86emu/ops.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/src/devices/oprom/x86emu/ops.c b/src/devices/oprom/x86emu/ops.c index 70e048dc2f..6bfc71c08c 100644 --- a/src/devices/oprom/x86emu/ops.c +++ b/src/devices/oprom/x86emu/ops.c @@ -2058,27 +2058,29 @@ Handles opcode 0x8d static void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1)) { int mod, rl, rh; - u16 *srcreg; uint destoffset; -/* - * TODO: Need to handle address size prefix! - * - * lea eax,[eax+ebx*2] ?? - */ - START_OF_INSTR(); DECODE_PRINTF("LEA\t"); FETCH_DECODE_MODRM(mod, rh, rl); if (mod < 3) { - srcreg = DECODE_RM_WORD_REGISTER(rh); - DECODE_PRINTF(","); - destoffset = decode_rmXX_address(mod, rl); - DECODE_PRINTF("\n"); - TRACE_AND_STEP(); - *srcreg = (u16)destoffset; + 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. } */ + } + /* else { undefined. Do nothing. } */ DECODE_CLEAR_SEGOVR(); END_OF_INSTR(); } |