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TCG: Move translation block variables to new context inside tcg_ctx: tb_ctx

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It's worth to clean-up translation blocks variables and move them
into one context as was suggested by Swirl.
Also if we use this context directly inside tcg_ctx, then it
speeds up code generation a bit.

Signed-off-by: Evgeny Voevodin <evgenyvoevodin@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Evgeny Voevodin 2013-02-01 01:47:23 +07:00 • committed by Blue Swirl
parent 0b0d3320db
commit 5e5f07e08f
5 changed files with 79 additions and 70 deletions
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18
cpu-exec.c
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@ -23,8 +23,6 @@
#include "qemu/atomic.h"
#include "sysemu/qtest.h"
int tb_invalidated_flag;
//#define CONFIG_DEBUG_EXEC
bool qemu_cpu_has_work(CPUState *cpu)
@ -90,13 +88,13 @@ static TranslationBlock *tb_find_slow(CPUArchState *env,
tb_page_addr_t phys_pc, phys_page1;
target_ulong virt_page2;
tb_invalidated_flag = 0;
tcg_ctx.tb_ctx.tb_invalidated_flag = 0;
/* find translated block using physical mappings */
phys_pc = get_page_addr_code(env, pc);
phys_page1 = phys_pc & TARGET_PAGE_MASK;
h = tb_phys_hash_func(phys_pc);
ptb1 = &tb_phys_hash[h];
ptb1 = &tcg_ctx.tb_ctx.tb_phys_hash[h];
for(;;) {
tb = *ptb1;
if (!tb)
@ -128,8 +126,8 @@ static TranslationBlock *tb_find_slow(CPUArchState *env,
/* Move the last found TB to the head of the list */
if (likely(*ptb1)) {
*ptb1 = tb->phys_hash_next;
tb->phys_hash_next = tb_phys_hash[h];
tb_phys_hash[h] = tb;
tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[h];
tcg_ctx.tb_ctx.tb_phys_hash[h] = tb;
}
/* we add the TB in the virtual pc hash table */
env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
@ -563,16 +561,16 @@ int cpu_exec(CPUArchState *env)
#endif
}
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
spin_lock(&tb_lock);
spin_lock(&tcg_ctx.tb_ctx.tb_lock);
tb = tb_find_fast(env);
/* Note: we do it here to avoid a gcc bug on Mac OS X when
doing it in tb_find_slow */
if (tb_invalidated_flag) {
if (tcg_ctx.tb_ctx.tb_invalidated_flag) {
/* as some TB could have been invalidated because
of memory exceptions while generating the code, we
must recompute the hash index here */
next_tb = 0;
tb_invalidated_flag = 0;
tcg_ctx.tb_ctx.tb_invalidated_flag = 0;
}
#ifdef CONFIG_DEBUG_EXEC
qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n",
@ -585,7 +583,7 @@ int cpu_exec(CPUArchState *env)
if (next_tb != 0 && tb->page_addr[1] == -1) {
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
}
spin_unlock(&tb_lock);
spin_unlock(&tcg_ctx.tb_ctx.tb_lock);
/* cpu_interrupt might be called while translating the
TB, but before it is linked into a potentially