diff options
| author | Emilio G. Cota | 2017-04-27 05:29:19 +0200 |
|---|---|---|
| committer | Richard Henderson | 2017-06-05 18:25:42 +0200 |
| commit | 7ad55b4ffd982c80f26f7f3658138d94cdc678e8 (patch) | |
| tree | e344fb70c52df373e8312fe2a281c020cbcbe475 | |
| parent | tcg/i386: implement goto_ptr (diff) | |
| download | qemu-7ad55b4ffd982c80f26f7f3658138d94cdc678e8.tar.gz qemu-7ad55b4ffd982c80f26f7f3658138d94cdc678e8.tar.xz qemu-7ad55b4ffd982c80f26f7f3658138d94cdc678e8.zip | |
target/arm: optimize cross-page direct jumps in softmmu
Instead of unconditionally exiting to the exec loop, use the
lookup_and_goto_ptr helper to jump to the target if it is valid.
Perf impact: see next commit's log.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1493263764-18657-7-git-send-email-cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | target/arm/translate.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/target/arm/translate.c b/target/arm/translate.c index ae6646c05b..d72953f124 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -4157,8 +4157,12 @@ 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 addr = tcg_temp_new(); + gen_set_pc_im(s, dest); - tcg_gen_exit_tb(0); + tcg_gen_extu_i32_tl(addr, cpu_R[15]); + tcg_gen_lookup_and_goto_ptr(addr); + tcg_temp_free(addr); } } |