yuzu-emu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2024-10-20 07:28:23 +02:00
Code Issues Packages Projects Releases Wiki Activity

target-i386: emulate XCHG using atomic helper

Browse Source 
Backports commit ea97ebe89f7a879ea9aba90140e40c29b5cbd653 from qemu
This commit is contained in:
Emilio G. Cota 2018-02-27 23:40:13 -05:00 committed by Lioncash
parent 8f96b6beb9
commit 9d9b7dedac
No known key found for this signature in database
GPG Key ID: 4E3C3CC1031BA9C7
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
qemu/target-i386/translate.c
View File

@ -6224,12 +6224,8 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
gen_lea_modrm(env, s, modrm);
gen_op_mov_v_reg(tcg_ctx, ot, cpu_T0, reg);
/* for xchg, lock is implicit */
if (!(prefixes & PREFIX_LOCK))
gen_helper_lock(tcg_ctx, cpu_env);
gen_op_ld_v(s, ot, cpu_T1, cpu_A0);
gen_op_st_v(s, ot, cpu_T0, cpu_A0);
if (!(prefixes & PREFIX_LOCK))
gen_helper_unlock(tcg_ctx, cpu_env);
tcg_gen_atomic_xchg_tl(tcg_ctx, cpu_T1, cpu_A0, cpu_T0,
s->mem_index, ot | MO_LE);
gen_op_mov_reg_v(tcg_ctx, ot, reg, cpu_T1);
}
break;