| Message ID | 1493187803-4510-6-git-send-email-cota@braap.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 04/26/2017 08:23 AM, Emilio G. Cota wrote: > 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. > > Signed-off-by: Emilio G. Cota<cota@braap.org> > --- > target/arm/translate.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) Reviewed-by: Richard Henderson <rth@twiddle.net> r~
diff --git a/target/arm/translate.c b/target/arm/translate.c index e32e38c..02cad96 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 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); } }
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. Signed-off-by: Emilio G. Cota <cota@braap.org> --- target/arm/translate.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)