[Qemu-arm] [PATCH v2 11/13] target/i386: optimize cross-page direct jumps in softmmu

[Emilio G. Cota]

Instead of unconditionally exiting to the exec loop, use the
gen_jr helper to jump to the target if it is valid.

As long as the hit rate in tb_jmp_cache remains high, this
change improves performance.

Perf impact: see the next commit's log.

Signed-off-by: Emilio G. Cota <address@hidden>
---
 target/i386/translate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/i386/translate.c b/target/i386/translate.c
index 445082b..9982a2d 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -2154,9 +2154,9 @@ static inline void gen_goto_tb(DisasContext *s, int 
tb_num, target_ulong eip)
         gen_jmp_im(eip);
         tcg_gen_exit_tb((uintptr_t)s->tb + tb_num);
     } else {
-        /* jump to another page: currently not optimized */
+        /* jump to another page */
         gen_jmp_im(eip);
-        gen_eob(s);
+        gen_jr(s, cpu_tmp0);
     }
 }
 
-- 
2.7.4