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[Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper
From: |
Emilio G. Cota |
Subject: |
[Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper |
Date: |
Wed, 26 Apr 2017 02:23:14 -0400 |
This paves the way for upcoming work.
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Emilio G. Cota <address@hidden>
---
tcg-runtime.c | 21 +++++++++++++++++++++
tcg/tcg-runtime.h | 2 ++
tcg/tcg.h | 1 +
3 files changed, 24 insertions(+)
diff --git a/tcg-runtime.c b/tcg-runtime.c
index 4c60c96..90d2d4b 100644
--- a/tcg-runtime.c
+++ b/tcg-runtime.c
@@ -27,6 +27,7 @@
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "exec/exec-all.h"
+#include "exec/tb-hash.h"
/* 32-bit helpers */
@@ -141,6 +142,26 @@ uint64_t HELPER(ctpop_i64)(uint64_t arg)
return ctpop64(arg);
}
+void *HELPER(lookup_tb_ptr)(CPUArchState *env, target_ulong addr)
+{
+ CPUState *cpu = ENV_GET_CPU(env);
+ TranslationBlock *tb;
+ target_ulong cs_base, pc;
+ uint32_t flags;
+
+ if (unlikely(atomic_read(&cpu->exit_request))) {
+ goto out_epilogue;
+ }
+ cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
+ tb = atomic_rcu_read(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(addr)]);
+ if (likely(tb && tb->pc == addr && tb->cs_base == cs_base &&
+ tb->flags == flags)) {
+ return tb->tc_ptr;
+ }
+ out_epilogue:
+ return tcg_ctx.code_gen_epilogue;
+}
+
void HELPER(exit_atomic)(CPUArchState *env)
{
cpu_loop_exit_atomic(ENV_GET_CPU(env), GETPC());
diff --git a/tcg/tcg-runtime.h b/tcg/tcg-runtime.h
index 114ea6f..c41d38a 100644
--- a/tcg/tcg-runtime.h
+++ b/tcg/tcg-runtime.h
@@ -24,6 +24,8 @@ DEF_HELPER_FLAGS_1(clrsb_i64, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_1(ctpop_i32, TCG_CALL_NO_RWG_SE, i32, i32)
DEF_HELPER_FLAGS_1(ctpop_i64, TCG_CALL_NO_RWG_SE, i64, i64)
+DEF_HELPER_FLAGS_2(lookup_tb_ptr, TCG_CALL_NO_WG_SE, ptr, env, tl)
+
DEF_HELPER_FLAGS_1(exit_atomic, TCG_CALL_NO_WG, noreturn, env)
#ifdef CONFIG_SOFTMMU
diff --git a/tcg/tcg.h b/tcg/tcg.h
index 6c216bb..5ec48d1 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -699,6 +699,7 @@ struct TCGContext {
extension that allows arithmetic on void*. */
int code_gen_max_blocks;
void *code_gen_prologue;
+ void *code_gen_epilogue;
void *code_gen_buffer;
size_t code_gen_buffer_size;
void *code_gen_ptr;
--
2.7.4
- [Qemu-devel] [PATCH v3 05/10] target/arm: optimize cross-page direct jumps in softmmu, (continued)
- [Qemu-devel] [PATCH v3 05/10] target/arm: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v3 08/10] target/i386: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v3 04/10] tcg/i386: implement goto_ptr op, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v3 07/10] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v3 09/10] target/i386: optimize indirect branches, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper,
Emilio G. Cota <=
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Paolo Bonzini, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Richard Henderson, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Richard Henderson, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
Re: [Qemu-devel] [PATCH v3 01/10] tcg-runtime: add lookup_tb_ptr helper, Alex Bennée, 2017/04/26