Function _mm512_maskz_alignr_epi64
#[target_feature(enable = "avx512f")]
pub const fn _mm512_maskz_alignr_epi64(k: __mmask8, a: __m512i, b: __m512i, IMM8: i32) -> __m512iConcatenate a and b into a 128-byte immediate result, shift the result right by imm8 64-bit elements, and stores the low 64 bytes (8 elements) in dst using zeromask k (elements are zeroed out when the corresponding mask bit is not set).