@@ -4784,11 +4784,19 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
set_cc_op(s, CC_OP_LOGICB + ot);
break;
case 2: /* not */
- tcg_gen_not_tl(cpu_T0, cpu_T0);
- if (mod != 3) {
- gen_op_st_v(s, ot, cpu_T0, cpu_A0);
+ if (s->prefix & PREFIX_LOCK) {
+ if (mod == 3) {
+ goto illegal_op;
+ }
+ tcg_gen_movi_tl(cpu_T0, ~0);
+ gen_atomic_xor_fetch(cpu_T0, cpu_A0, cpu_T0, ot);
} else {
- gen_op_mov_reg_v(ot, rm, cpu_T0);
+ tcg_gen_not_tl(cpu_T0, cpu_T0);
+ if (mod != 3) {
+ gen_op_st_v(s, ot, cpu_T0, cpu_A0);
+ } else {
+ gen_op_mov_reg_v(ot, rm, cpu_T0);
+ }
}
break;
case 3: /* neg */
Signed-off-by: Emilio G. Cota <cota@braap.org> --- target-i386/translate.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)