rm = (modrm & 7) | REX_B(s);
op = (modrm >> 3) & 7;
if (mod != 3) {
- if (op == 0)
+ if (op == 0) {
s->rip_offset = insn_const_size(ot);
+ }
gen_lea_modrm(env, s, modrm);
- gen_op_ld_v(s, ot, cpu_T0, cpu_A0);
+ /* For those below that handle locked memory, don't load here. */
+ if (!(s->prefix & PREFIX_LOCK)
+ || op != 2) {
+ gen_op_ld_v(s, ot, cpu_T0, cpu_A0);
+ }
} else {
gen_op_mov_v_reg(ot, cpu_T0, rm);
}
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);
+ tcg_gen_atomic_xor_fetch_tl(cpu_T0, cpu_A0, cpu_T0,
+ s->mem_index, ot | MO_LE);
} 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 */