[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st rese
From: |
Nikunj A Dadhania |
Subject: |
[Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation |
Date: |
Fri, 2 Sep 2016 12:02:55 +0530 |
Signed-off-by: Nikunj A Dadhania <address@hidden>
---
target-ppc/translate.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 4a882b3..447c13e 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -72,6 +72,7 @@ static TCGv cpu_cfar;
#endif
static TCGv cpu_xer, cpu_so, cpu_ov, cpu_ca;
static TCGv cpu_reserve;
+static TCGv cpu_reserve_val;
static TCGv cpu_fpscr;
static TCGv_i32 cpu_access_type;
@@ -176,6 +177,9 @@ void ppc_translate_init(void)
cpu_reserve = tcg_global_mem_new(cpu_env,
offsetof(CPUPPCState, reserve_addr),
"reserve_addr");
+ cpu_reserve_val = tcg_global_mem_new(cpu_env,
+ offsetof(CPUPPCState, reserve_val),
+ "reserve_val");
cpu_fpscr = tcg_global_mem_new(cpu_env,
offsetof(CPUPPCState, fpscr), "fpscr");
@@ -3086,7 +3090,7 @@ static void gen_##name(DisasContext *ctx)
\
} \
tcg_gen_qemu_ld_tl(gpr, t0, ctx->mem_idx, memop); \
tcg_gen_mov_tl(cpu_reserve, t0); \
- tcg_gen_st_tl(gpr, cpu_env, offsetof(CPUPPCState, reserve_val)); \
+ tcg_gen_mov_tl(cpu_reserve_val, gpr); \
tcg_temp_free(t0); \
}
@@ -3112,14 +3116,28 @@ static void gen_conditional_store(DisasContext *ctx,
TCGv EA,
int reg, int memop)
{
TCGLabel *l1;
+ TCGv_i32 tmp = tcg_temp_local_new_i32();
+ TCGv t0;
+ tcg_gen_movi_i32(tmp, 0);
tcg_gen_trunc_tl_i32(cpu_crf[0], cpu_so);
l1 = gen_new_label();
tcg_gen_brcond_tl(TCG_COND_NE, EA, cpu_reserve, l1);
- tcg_gen_ori_i32(cpu_crf[0], cpu_crf[0], 1 << CRF_EQ);
- tcg_gen_qemu_st_tl(cpu_gpr[reg], EA, ctx->mem_idx, memop);
+
+ t0 = tcg_temp_new();
+ tcg_gen_atomic_cmpxchg_tl(t0, EA, cpu_reserve_val, cpu_gpr[reg],
+ ctx->mem_idx, DEF_MEMOP(memop));
+ tcg_gen_setcond_tl(TCG_COND_EQ, t0, t0, cpu_reserve_val);
+ tcg_gen_trunc_tl_i32(tmp, t0);
+
gen_set_label(l1);
+ tcg_gen_shli_i32(tmp, tmp, CRF_EQ);
+ tcg_gen_or_i32(cpu_crf[0], cpu_crf[0], tmp);
tcg_gen_movi_tl(cpu_reserve, -1);
+ tcg_gen_movi_tl(cpu_reserve_val, 0);
+
+ tcg_temp_free(t0);
+ tcg_temp_free_i32(tmp);
}
#endif
--
2.7.4
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, (continued)
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Benjamin Herrenschmidt, 2016/09/02
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Nikunj A Dadhania, 2016/09/02
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Alex Bennée, 2016/09/04
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Benjamin Herrenschmidt, 2016/09/04
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Benjamin Herrenschmidt, 2016/09/04
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Nikunj A Dadhania, 2016/09/05
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Benjamin Herrenschmidt, 2016/09/05
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Nikunj A Dadhania, 2016/09/06
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Benjamin Herrenschmidt, 2016/09/06
- Re: [Qemu-ppc] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu, Nikunj A Dadhania, 2016/09/06
[Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation,
Nikunj A Dadhania <=
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, David Gibson, 2016/09/07
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, David Gibson, 2016/09/07
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, Alex Bennée, 2016/09/07
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, David Gibson, 2016/09/11
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, Alex Bennée, 2016/09/12
- Re: [Qemu-ppc] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation, Benjamin Herrenschmidt, 2016/09/12
Re: [Qemu-ppc] [Qemu-devel] [PATCH RFC 0/4] Enable MTTCG on PowerPC, Cédric Le Goater, 2016/09/02