Instead of unconditionally exiting to the exec loop, use the
lookup_tb_ptr helper to jump to the target if it is valid.
As long as the hit rate in tb_jmp_cache remains high, this
will improve performance.
Perf impact: see the next commit's log.
Signed-off-by: Emilio G. Cota <address@hidden>
---
target/arm/translate.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index e32e38c..574cf70 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -4085,8 +4085,12 @@ static inline void gen_goto_tb(DisasContext *s, int n,
target_ulong dest)
gen_set_pc_im(s, dest);
tcg_gen_exit_tb((uintptr_t)s->tb + n);
} else {
+ TCGv_ptr ptr = tcg_temp_new_ptr();
+
gen_set_pc_im(s, dest);
- tcg_gen_exit_tb(0);
+ gen_helper_lookup_tb_ptr(ptr, cpu_env, cpu_R[15]);
+ tcg_gen_goto_ptr(ptr);
+ tcg_temp_free_ptr(ptr);
}