[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v8 24/37] target-i386: emulate LOCK'ed XADD using at
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v8 24/37] target-i386: emulate LOCK'ed XADD using atomic helper |
Date: |
Mon, 24 Oct 2016 10:39:35 -0700 |
From: "Emilio G. Cota" <address@hidden>
[rth: Move load of reg value to common location.]
Signed-off-by: Emilio G. Cota <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target-i386/translate.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index d2edbd9..3e6011b 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -5134,19 +5134,24 @@ static target_ulong disas_insn(CPUX86State *env,
DisasContext *s,
modrm = cpu_ldub_code(env, s->pc++);
reg = ((modrm >> 3) & 7) | rex_r;
mod = (modrm >> 6) & 3;
+ gen_op_mov_v_reg(ot, cpu_T0, reg);
if (mod == 3) {
rm = (modrm & 7) | REX_B(s);
- gen_op_mov_v_reg(ot, cpu_T0, reg);
gen_op_mov_v_reg(ot, cpu_T1, rm);
tcg_gen_add_tl(cpu_T0, cpu_T0, cpu_T1);
gen_op_mov_reg_v(ot, reg, cpu_T1);
gen_op_mov_reg_v(ot, rm, cpu_T0);
} else {
gen_lea_modrm(env, s, modrm);
- gen_op_mov_v_reg(ot, cpu_T0, reg);
- gen_op_ld_v(s, ot, cpu_T1, cpu_A0);
- tcg_gen_add_tl(cpu_T0, cpu_T0, cpu_T1);
- gen_op_st_v(s, ot, cpu_T0, cpu_A0);
+ if (s->prefix & PREFIX_LOCK) {
+ tcg_gen_atomic_fetch_add_tl(cpu_T1, cpu_A0, cpu_T0,
+ s->mem_index, ot | MO_LE);
+ tcg_gen_add_tl(cpu_T0, cpu_T0, cpu_T1);
+ } else {
+ gen_op_ld_v(s, ot, cpu_T1, cpu_A0);
+ tcg_gen_add_tl(cpu_T0, cpu_T0, cpu_T1);
+ gen_op_st_v(s, ot, cpu_T0, cpu_A0);
+ }
gen_op_mov_reg_v(ot, reg, cpu_T1);
}
gen_op_update2_cc();
--
2.7.4
- [Qemu-devel] [PATCH v8 10/37] cputlb: Replace SHIFT with DATA_SIZE, (continued)
- [Qemu-devel] [PATCH v8 10/37] cputlb: Replace SHIFT with DATA_SIZE, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 14/37] cputlb: Tidy some macros, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 19/37] target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 18/37] tcg: Emit barriers with parallel_cpus, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 13/37] cputlb: Move most of iotlb code out of line, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 16/37] tcg: Add atomic128 helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 20/37] target-i386: emulate LOCK'ed OP instructions using atomic helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 12/37] cputlb: Remove includes from softmmu_template.h, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 17/37] tcg: Add CONFIG_ATOMIC64, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 15/37] tcg: Add atomic helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 24/37] target-i386: emulate LOCK'ed XADD using atomic helper,
Richard Henderson <=
- [Qemu-devel] [PATCH v8 21/37] target-i386: emulate LOCK'ed INC using atomic helper, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 22/37] target-i386: emulate LOCK'ed NOT using atomic helper, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 23/37] target-i386: emulate LOCK'ed NEG using cmpxchg helper, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 25/37] target-i386: emulate LOCK'ed BTX ops using atomic helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 26/37] target-i386: emulate XCHG using atomic helper, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 28/37] tests: add atomic_add-bench, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 31/37] target-arm: emulate SWP with atomic_xchg helper, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 30/37] target-arm: emulate LL/SC using cmpxchg helpers, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 35/37] target-arm: remove EXCP_STREX + cpu_exclusive_{test, info}, Richard Henderson, 2016/10/24
- [Qemu-devel] [PATCH v8 29/37] target-arm: Rearrange aa32 load and store functions, Richard Henderson, 2016/10/24