pub unsafe fn _mm256_mask_cvtepi64_storeu_epi16(
    mem_addr: *mut i8,
    k: __mmask8,
    a: __m256i
🔬 This is a nightly-only experimental API. (stdsimd #48556)
Available on x86 and target feature avx512f,avx512vl only.
Expand description

Convert packed 64-bit integers in a to packed 16-bit integers with truncation, and store the active results (those with their respective bit set in writemask k) to unaligned memory at base_addr.

Intel’s documentation