Function _mm256_maskz_alignr_epi8
#[target_feature(enable = "avx512bw", enable = "avx512vl")]
pub const fn _mm256_maskz_alignr_epi8(k: __mmask32, a: __m256i, b: __m256i, IMM8: i32) -> __m256iConcatenate 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 zeromask k (elements are zeroed out when the corresponding mask bit is not set).