pub unsafe fn _mm_mask_alignr_epi64<const IMM8: i32>(
    src: __m128i,
    k: u8,
    a: __m128i,
    b: __m128i
) -> __m128i
🔬 This is a nightly-only experimental API. (stdsimd)
This is supported on x86-64 and target feature avx512f,avx512vl only.
Expand description

Concatenate a and b into a 32-byte immediate result, shift the result right by imm8 64-bit elements, and store the low 16 bytes (2 elements) in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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