target/arm: Remove unnecessary range check for VSHL
In 1dc8425e55
, while converting to gvec, I added an extra range check
against the shift count. This was unnecessary because the encoding of
the shift count produces 0 to the element size - 1.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200513163245.17915-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -5752,16 +5752,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
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gen_gvec_sli(size, rd_ofs, rm_ofs, shift,
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vec_size, vec_size);
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} else { /* VSHL */
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/* Shifts larger than the element size are
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* architecturally valid and results in zero.
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*/
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if (shift >= 8 << size) {
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tcg_gen_gvec_dup_imm(size, rd_ofs,
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vec_size, vec_size, 0);
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} else {
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tcg_gen_gvec_shli(size, rd_ofs, rm_ofs, shift,
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vec_size, vec_size);
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}
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tcg_gen_gvec_shli(size, rd_ofs, rm_ofs, shift,
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vec_size, vec_size);
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}
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return 0;
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}
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