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| author | Emilio G. Cota <cota@braap.org> | 2016-06-27 15:02:04 -0400 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-10-26 08:29:01 -0700 |
| commit | ea97ebe89f7a879ea9aba90140e40c29b5cbd653 (patch) | |
| tree | d134a4a95598fcea9ec3be05eaab84b1d20a1a06 /target-i386 | |
| parent | cfe819d309d472f75fd129faf1d1064a2498326c (diff) | |
| download | qemu-ea97ebe89f7a879ea9aba90140e40c29b5cbd653.zip qemu-ea97ebe89f7a879ea9aba90140e40c29b5cbd653.tar.gz qemu-ea97ebe89f7a879ea9aba90140e40c29b5cbd653.tar.bz2 | |
target-i386: emulate XCHG using atomic helper
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1467054136-10430-19-git-send-email-cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/translate.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index b3cb4c5..cfa3956 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -5564,12 +5564,8 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s, gen_lea_modrm(env, s, modrm); gen_op_mov_v_reg(ot, cpu_T0, reg); /* for xchg, lock is implicit */ - if (!(prefixes & PREFIX_LOCK)) - gen_helper_lock(); - 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_gen_atomic_xchg_tl(cpu_T1, cpu_A0, cpu_T0, + s->mem_index, ot | MO_LE); gen_op_mov_reg_v(ot, reg, cpu_T1); } break; |