pub unsafe fn _mm256_maskload_epi64(
    mem_addr: *const i64,
    mask: __m256i
) -> __m256i
This is supported on x86 and target feature avx2 only.
Expand description

Loads packed 64-bit integers from memory pointed by mem_addr using mask (elements are zeroed out when the highest bit is not set in the corresponding element).

Intel’s documentation