Function _mm256_mask_expandloadu_epi8

#[target_feature(enable = "avx512vbmi2", enable = "avx512vl")]
pub unsafe fn _mm256_mask_expandloadu_epi8(src: __m256i, k: __mmask32, mem_addr: *const i8) -> __m256i

Load contiguous active 8-bit integers 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).

Intel's documentation