Function _mm512_mask_alignr_epi64

pub unsafe fn _mm512_mask_alignr_epi64<const IMM8: i32>(
    src: __m512i,
    k: u8,
    a: __m512i,
    b: __m512i,
) -> __m512i

🔬This is a nightly-only experimental API. (stdarch_x86_avx512)

Available on x86 only.

Concatenate a and b into a 128-byte immediate result, shift the result right by imm8 64-bit elements, and store the low 64 bytes (8 elements) in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

Intel’s documentation