diff options
Diffstat (limited to 'm68k_to_x86.c')
| -rw-r--r-- | m68k_to_x86.c | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/m68k_to_x86.c b/m68k_to_x86.c index 85869fd..ba7f14a 100644 --- a/m68k_to_x86.c +++ b/m68k_to_x86.c @@ -3084,8 +3084,46 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) dst = m68k_save_result(inst, dst, opts); } break; - /*case M68K_CHK: - break;*/ + case M68K_CHK: + { + dst = cycles(dst, 6); + if (dst_op.mode == MODE_REG_DIRECT) { + dst = cmp_ir(dst, 0, dst_op.base, inst->extra.size); + } else { + dst = cmp_irdisp8(dst, 0, dst_op.base, dst_op.disp, inst->extra.size); + } + uint8_t * passed = dst+1; + dst = jcc(dst, CC_GE, dst+2); + dst = mov_ir(dst, 1, FLAG_N, SZ_B); + dst = mov_ir(dst, VECTOR_CHK, SCRATCH2, SZ_D); + dst = mov_ir(dst, inst->address+2, SCRATCH1, SZ_D); + dst = jmp(dst, (uint8_t *)m68k_trap); + *passed = dst - (passed+1); + if (dst_op.mode == MODE_REG_DIRECT) { + if (src_op.mode == MODE_REG_DIRECT) { + dst = cmp_rr(dst, src_op.base, dst_op.base, inst->extra.size); + } else if(src_op.mode == MODE_REG_DISPLACE8) { + dst = cmp_rdisp8r(dst, src_op.base, src_op.disp, dst_op.base, inst->extra.size); + } else { + dst = cmp_ir(dst, src_op.disp, dst_op.base, inst->extra.size); + } + } else if(dst_op.mode == MODE_REG_DISPLACE8) { + if (src_op.mode == MODE_REG_DIRECT) { + dst = cmp_rrdisp8(dst, src_op.base, dst_op.base, dst_op.disp, inst->extra.size); + } else { + dst = cmp_irdisp8(dst, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size); + } + } + passed = dst+1; + dst = jcc(dst, CC_LE, dst+2); + dst = mov_ir(dst, 0, FLAG_N, SZ_B); + dst = mov_ir(dst, VECTOR_CHK, SCRATCH2, SZ_D); + dst = mov_ir(dst, inst->address+2, SCRATCH1, SZ_D); + dst = jmp(dst, (uint8_t *)m68k_trap); + *passed = dst - (passed+1); + dst = cycles(dst, 4); + break; + } case M68K_DIVS: case M68K_DIVU: //TODO: Trap on division by zero @@ -3802,7 +3840,7 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) break; //case M68K_TAS: case M68K_TRAP: - dst = mov_ir(dst, src_op.disp, SCRATCH2, SZ_D); + dst = mov_ir(dst, src_op.disp + VECTOR_TRAP_0, SCRATCH2, SZ_D); dst = mov_ir(dst, inst->address+2, SCRATCH1, SZ_D); dst = jmp(dst, (uint8_t *)m68k_trap); break; |