pub unsafe fn _mm256_mask_alignr_epi8(
    src: __m256i, 
    k: __mmask32, 
    a: __m256i, 
    b: __m256i, 
    const IMM8: i32
) -> __m256iThis is supported on x86 and target feature 
avx512bw,avx512vl only.Expand description
Concatenate pairs of 16-byte blocks in a and b into a 32-byte temporary result, shift the result right by imm8 bytes, and store the low 16 bytes in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).