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accel/tcg: Precompute curr_cflags into cpu->tcg_cflags

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The primary motivation is to remove a dozen insns along
the fast-path in tb_lookup.  As a byproduct, this allows
us to completely remove parallel_cpus.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2021-03-01 19:21:08 -08:00
parent 872ebd884d
commit 6cc9d67c6f
11 changed files with 30 additions and 27 deletions
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7
include/exec/exec-all.h
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@@ -513,8 +513,6 @@ struct TranslationBlock {
uintptr_t jmp_dest[2];
};
extern bool parallel_cpus;
/* Hide the qatomic_read to make code a little easier on the eyes */
static inline uint32_t tb_cflags(const TranslationBlock *tb)
{
@@ -524,10 +522,7 @@ static inline uint32_t tb_cflags(const TranslationBlock *tb)
/* current cflags for hashing/comparison */
static inline uint32_t curr_cflags(CPUState *cpu)
{
uint32_t cflags = deposit32(0, CF_CLUSTER_SHIFT, 8, cpu->cluster_index);
cflags |= parallel_cpus ? CF_PARALLEL : 0;
cflags |= icount_enabled() ? CF_USE_ICOUNT : 0;
return cflags;
return cpu->tcg_cflags;
}
/* TranslationBlock invalidate API */