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Optimize avx2 store of batch_bool for 64 bit registers #1176

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Merged
serge-sans-paille merged 1 commit into from
Oct 11, 2025
Merged

Optimize avx2 store of batch_bool for 64 bit registers #1176

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8 changes: 2 additions & 6 deletions include/xsimd/arch/xsimd_avx2.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1013,12 +1013,8 @@ namespace xsimd
}
else XSIMD_IF_CONSTEXPR(sizeof(T) == 8)
{
const auto bmask = _mm_set_epi8(
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, 8, 0);
auto pack = _mm_unpacklo_epi16(_mm_shuffle_epi8(b_lo, bmask), _mm_shuffle_epi8(b_hi, bmask));
uint32_t val = _mm_cvtsi128_si32(_mm_sub_epi8(_mm_set1_epi8(0), pack));
memcpy(mem, &val, sizeof(val));
uint32_t mask = _mm256_movemask_epi8(_mm256_srli_epi64(b, 56));
memcpy(mem, &mask, sizeof(mask));
}
else
{
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