Function core_arch::x86::_mm256_blendv_epi8

pub unsafe fn _mm256_blendv_epi8(
    a: __m256i, 
    b: __m256i, 
    mask: __m256i
) -> __m256i

This is supported on x86 and target feature avx2 only.

Blends packed 8-bit integers from a and b using mask.

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