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Last active January 1, 2016 16:39
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_M256_SLLI_SI256 CROSS LANE
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gistfile1.txt
template <unsigned int N> __m256i _mm256_shift_left2(__m256i a) {
__m256i mask = _mm256_srli_si256(
_mm256_permute2x128_si256(a, a, _MM_SHUFFLE(0,0,3,0)) , 16-N);
return _mm256_or_si256(_mm256_slli_si256(a,N),mask);
}
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