Function core::arch::x86::_mm256_mask_permutex2var_epi64

pub unsafe fn _mm256_mask_permutex2var_epi64(
    a: __m256i,
    k: __mmask8,
    idx: __m256i,
    b: __m256i
) -> __m256i

🔬 This is a nightly-only experimental API. (stdsimd #48556)

Available on x86 and target feature avx512f,avx512vl only.

Shuffle 64-bit integers in a and b across lanes using the corresponding selector and index in idx, and store the results in dst using writemask k (elements are copied from a when the corresponding mask bit is not set).

Intel’s documentation