Commit 06a57e5c authored by Aurelien Jarno's avatar Aurelien Jarno
Browse files

target/mips: optimize WSBH, DSBH and DSHD 



Use the same mask to avoid having to load two different constants.

Suggested-by: default avatarRichard Henderson <rth@twiddle.net>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
parent c6c2c0fc

target/mips/translate.c

+12 −6
Original line number Diff line number Diff line
@@ -4572,12 +4572,14 @@ static void gen_bshfl (DisasContext *ctx, uint32_t op2, int rt, int rd) 
    case OPC_WSBH:

        {

            TCGv t1 = tcg_temp_new();

            TCGv t2 = tcg_const_tl(0x00FF00FF);









            tcg_gen_shri_tl(t1, t0, 8);









            tcg_gen_andi_tl(t1, t1, 0x00FF00FF);









            tcg_gen_and_tl(t1, t1, t2);









            tcg_gen_and_tl(t0, t0, t2);









            tcg_gen_shli_tl(t0, t0, 8);









            tcg_gen_andi_tl(t0, t0, ~0x00FF00FF);









            tcg_gen_or_tl(t0, t0, t1);









            tcg_temp_free(t2);









            tcg_temp_free(t1);









            tcg_gen_ext32s_tl(cpu_gpr[rd], t0);









        }








@@ -4592,27 +4594,31 @@ static void gen_bshfl (DisasContext *ctx, uint32_t op2, int rt, int rd)







    case OPC_DSBH:









        {









            TCGv t1 = tcg_temp_new();









            TCGv t2 = tcg_const_tl(0x00FF00FF00FF00FFULL);

















            tcg_gen_shri_tl(t1, t0, 8);









            tcg_gen_andi_tl(t1, t1, 0x00FF00FF00FF00FFULL);









            tcg_gen_and_tl(t1, t1, t2);









            tcg_gen_and_tl(t0, t0, t2);









            tcg_gen_shli_tl(t0, t0, 8);









            tcg_gen_andi_tl(t0, t0, ~0x00FF00FF00FF00FFULL);









            tcg_gen_or_tl(cpu_gpr[rd], t0, t1);









            tcg_temp_free(t2);









            tcg_temp_free(t1);









        }









        break;









    case OPC_DSHD:









        {









            TCGv t1 = tcg_temp_new();









            TCGv t2 = tcg_const_tl(0x0000FFFF0000FFFFULL);

















            tcg_gen_shri_tl(t1, t0, 16);









            tcg_gen_andi_tl(t1, t1, 0x0000FFFF0000FFFFULL);









            tcg_gen_and_tl(t1, t1, t2);









            tcg_gen_and_tl(t0, t0, t2);









            tcg_gen_shli_tl(t0, t0, 16);









            tcg_gen_andi_tl(t0, t0, ~0x0000FFFF0000FFFFULL);









            tcg_gen_or_tl(t0, t0, t1);









            tcg_gen_shri_tl(t1, t0, 32);









            tcg_gen_shli_tl(t0, t0, 32);









            tcg_gen_or_tl(cpu_gpr[rd], t0, t1);









            tcg_temp_free(t2);









            tcg_temp_free(t1);









        }









        break;