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[Qemu-arm] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper
From: |
Emilio G. Cota |
Subject: |
[Qemu-arm] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper |
Date: |
Wed, 26 Apr 2017 23:29:15 -0400 |
This paves the way for upcoming work.
Reviewed-by: Richard Henderson <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
Signed-off-by: Emilio G. Cota <address@hidden>
---
tcg-runtime.c | 24 ++++++++++++++++++++++++
tcg/tcg-runtime.h | 2 ++
tcg/tcg.h | 1 +
3 files changed, 27 insertions(+)
diff --git a/tcg-runtime.c b/tcg-runtime.c
index 4c60c96..8a24bdd 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 +142,29 @@ 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;
+
+ tb = atomic_rcu_read(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(addr)]);
+ if (likely(tb)) {
+ cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
+ if (likely(tb->pc == addr && tb->cs_base == cs_base &&
+ tb->flags == flags)) {
+ return tb->tc_ptr;
+ }
+ tb = tb_htable_lookup(cpu, pc, cs_base, flags);
+ if (likely(tb)) {
+ atomic_set(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(addr)], tb);
+ return tb->tc_ptr;
+ }
+ }
+ 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-arm] [PATCH v4 00/11] TCG optimizations for 2.10, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 06/11] target/arm: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 08/11] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 01/11] exec-all: export tb_htable_lookup, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 11/11] tb-hash: improve tb_jmp_cache hash function in user mode, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 09/11] target/i386: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 04/11] tcg: export tcg_gen_lookup_and_goto_ptr, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper,
Emilio G. Cota <=
- [Qemu-arm] [PATCH v4 03/11] tcg: introduce goto_ptr opcode, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 05/11] tcg/i386: implement goto_ptr op, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 07/11] target/arm: optimize indirect branches, Emilio G. Cota, 2017/04/26
- Re: [Qemu-arm] [PATCH v4 07/11] target/arm: optimize indirect branches, Alex Bennée, 2017/04/27
- [Qemu-arm] [PATCH v4 10/11] target/i386: optimize indirect branches, Emilio G. Cota, 2017/04/26
- Re: [Qemu-arm] [PATCH v4 00/11] TCG optimizations for 2.10, Emilio G. Cota, 2017/04/26