pub unsafe fn _mm256_mask_loadu_pd(
    src: __m256d,
    k: __mmask8,
    mem_addr: *const f64
) -> __m256d
🔬 This is a nightly-only experimental API. (stdsimd #48556)
Available on x86-64 and target feature avx512f,avx512vl,avx only.
Expand description

Load packed double-precision (64-bit) floating-point elements from memory into dst using writemask k (elements are copied from src when the corresponding mask bit is not set). mem_addr does not need to be aligned on any particular boundary.

Intel’s documentation