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target/arm: Use {, s}extract in handle_vec_simd_wshli 

Combine the right shift with the extension via
the tcg extract operations.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240912024114.1097832-19-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-09-11 19:41:03 -07:00 committed by Peter Maydell
parent 583d69a746
commit 102f062e6e
1 changed files with 5 additions and 2 deletions
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7
target/arm/tcg/translate-a64.c
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@ -10477,8 +10477,11 @@ static void handle_vec_simd_wshli(DisasContext *s, bool is_q, bool is_u,
read_vec_element(s, tcg_rn, rn, is_q ? 1 : 0, MO_64);
for (i = 0; i < elements; i++) {
tcg_gen_shri_i64(tcg_rd, tcg_rn, i * esize);
ext_and_shift_reg(tcg_rd, tcg_rd, size | (!is_u << 2), 0);
if (is_u) {
tcg_gen_extract_i64(tcg_rd, tcg_rn, i * esize, esize);
} else {
tcg_gen_sextract_i64(tcg_rd, tcg_rn, i * esize, esize);
}
tcg_gen_shli_i64(tcg_rd, tcg_rd, shift);
write_vec_element(s, tcg_rd, rd, i, size + 1);
}