pub fn _mm256_mask_compress_epi64(
    src: __m256i,
    k: __mmask8,
    a: __m256i,
) -> __m256iAvailable on x86 and target feature 
avx512f and target feature avx512vl only.Expand description
Contiguously store the active 64-bit integers in a (those with their respective bit set in writemask k) to dst, and pass through the remaining elements from src.