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[Qemu-devel] [PATCH v6 24/35] target-i386: emulate XCHG using atomic hel
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v6 24/35] target-i386: emulate XCHG using atomic helper |
Date: |
Tue, 11 Oct 2016 14:40:50 -0500 |
From: "Emilio G. Cota" <address@hidden>
Signed-off-by: Emilio G. Cota <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target-i386/translate.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index e781869..c8827f3 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;
--
2.7.4
- Re: [Qemu-devel] [PATCH v6 13/35] tcg: Add atomic helpers, (continued)
- [Qemu-devel] [PATCH v6 17/35] target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 19/35] target-i386: emulate LOCK'ed INC using atomic helper, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 18/35] target-i386: emulate LOCK'ed OP instructions using atomic helpers, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 21/35] target-i386: emulate LOCK'ed NEG using cmpxchg helper, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 20/35] target-i386: emulate LOCK'ed NOT using atomic helper, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 22/35] target-i386: emulate LOCK'ed XADD using atomic helper, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 23/35] target-i386: emulate LOCK'ed BTX ops using atomic helpers, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 24/35] target-i386: emulate XCHG using atomic helper,
Richard Henderson <=
- [Qemu-devel] [PATCH v6 25/35] target-i386: remove helper_lock(), Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 26/35] tests: add atomic_add-bench, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 27/35] target-arm: Rearrange aa32 load and store functions, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 28/35] target-arm: emulate LL/SC using cmpxchg helpers, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 29/35] target-arm: emulate SWP with atomic_xchg helper, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 31/35] linux-user: remove handling of ARM's EXCP_STREX, Richard Henderson, 2016/10/11
- [Qemu-devel] [PATCH v6 32/35] linux-user: remove handling of aarch64's EXCP_STREX, Richard Henderson, 2016/10/11