[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v4 09/11] target/i386: optimize cross-page direct ju
From: |
Emilio G. Cota |
Subject: |
[Qemu-devel] [PATCH v4 09/11] target/i386: optimize cross-page direct jumps in softmmu |
Date: |
Wed, 26 Apr 2017 23:29:22 -0400 |
Instead of unconditionally exiting to the exec loop, use the
gen_jr helper to jump to the target if it is valid.
Perf impact: see next commit's log.
Reviewed-by: Richard Henderson <address@hidden>
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 f0e48dc..ea113fe 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
- [Qemu-devel] [PATCH v4 00/11] TCG optimizations for 2.10, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v4 09/11] target/i386: optimize cross-page direct jumps in softmmu,
Emilio G. Cota <=
- [Qemu-devel] [PATCH v4 06/11] target/arm: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v4 03/11] tcg: introduce goto_ptr opcode, Emilio G. Cota, 2017/04/26
- [Qemu-devel] [PATCH v4 07/11] target/arm: optimize indirect branches, Emilio G. Cota, 2017/04/26
- Re: [Qemu-devel] [PATCH v4 07/11] target/arm: optimize indirect branches, Alex Bennée, 2017/04/27
- [Qemu-devel] [PATCH v4 01/11] exec-all: export tb_htable_lookup, Emilio G. Cota, 2017/04/26