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target/arm: Simplify do_long_3d and do_2scalar_long

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In both cases, we can sink the write-back and perform
the accumulate into the normal destination temps.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201030022618.785675-11-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-11-02 16:52:15 +00:00 committed by Peter Maydell
parent b38b96ca90
commit 9f1a5f93c2
1 changed files with 9 additions and 14 deletions
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23
target/arm/translate-neon.c.inc
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@ -2037,17 +2037,14 @@ static bool do_long_3d(DisasContext *s, arg_3diff *a,
if (accfn) {
tmp = tcg_temp_new_i64();
read_neon_element64(tmp, a->vd, 0, MO_64);
accfn(tmp, tmp, rd0);
write_neon_element64(tmp, a->vd, 0, MO_64);
accfn(rd0, tmp, rd0);
read_neon_element64(tmp, a->vd, 1, MO_64);
accfn(tmp, tmp, rd1);
write_neon_element64(tmp, a->vd, 1, MO_64);
accfn(rd1, tmp, rd1);
tcg_temp_free_i64(tmp);
} else {
write_neon_element64(rd0, a->vd, 0, MO_64);
write_neon_element64(rd1, a->vd, 1, MO_64);
}
write_neon_element64(rd0, a->vd, 0, MO_64);
write_neon_element64(rd1, a->vd, 1, MO_64);
tcg_temp_free_i64(rd0);
tcg_temp_free_i64(rd1);
@ -2670,16 +2667,14 @@ static bool do_2scalar_long(DisasContext *s, arg_2scalar *a,
if (accfn) {
TCGv_i64 t64 = tcg_temp_new_i64();
read_neon_element64(t64, a->vd, 0, MO_64);
accfn(t64, t64, rn0_64);
write_neon_element64(t64, a->vd, 0, MO_64);
accfn(rn0_64, t64, rn0_64);
read_neon_element64(t64, a->vd, 1, MO_64);
accfn(t64, t64, rn1_64);
write_neon_element64(t64, a->vd, 1, MO_64);
accfn(rn1_64, t64, rn1_64);
tcg_temp_free_i64(t64);
} else {
write_neon_element64(rn0_64, a->vd, 0, MO_64);
write_neon_element64(rn1_64, a->vd, 1, MO_64);
}
write_neon_element64(rn0_64, a->vd, 0, MO_64);
write_neon_element64(rn1_64, a->vd, 1, MO_64);
tcg_temp_free_i64(rn0_64);
tcg_temp_free_i64(rn1_64);
return true;