diff options
| -rw-r--r-- | target-i386/translate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index 579831ef7a..9723e76092 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -3887,7 +3887,7 @@ static target_ulong disas_insn(DisasContext *s, target_ulong pc_start) case 0x1c7: /* cmpxchg8b */ modrm = ldub_code(s->pc++); mod = (modrm >> 6) & 3; - if (mod == 3) + if ((mod == 3) || ((modrm & 0x38) != 0x8)) goto illegal_op; gen_jmp_im(pc_start - s->cs_base); if (s->cc_op != CC_OP_DYNAMIC) |