Commit 7ad55b4f authored by Emilio G. Cota's avatar Emilio G. Cota Committed by Richard Henderson
Browse files

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: default avatarAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarEmilio G. Cota <cota@braap.org>
Message-Id: <1493263764-18657-7-git-send-email-cota@braap.org>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 5cb4ef80

target/arm/translate.c

+5 −1
Original line number Diff line number Diff line
@@ -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);

    }

}