pub unsafe fn _mm256_mask_expandloadu_pd(
    src: __m256d, 
    k: __mmask8, 
    mem_addr: *const f64
) -> __m256dThis is supported on x86 and target feature 
avx512f,avx512vl,avx only.Expand description
Load contiguous active single-precision (64-bit) floating-point elements from unaligned memory at mem_addr (those with their respective bit set in mask k), and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).