Richard Henderson <r...@twiddle.net> writes:
> From: "Emilio G. Cota" <c...@braap.org>
>
> 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: Richard Henderson <r...@twiddle.net>
> Signed-off-by: Emilio G. Cota <c...@braap.org>
> Message-Id: <1493263764-18657-7-git-send-email-c...@braap.org>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
> ---
> 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 0b5a0bc..facb52f 100644
> --- a/target/arm/translate.c
> +++ b/target/arm/translate.c
> @@ -4153,8 +4153,12 @@ 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);
> }
> }
--
Alex Bennée
