pub unsafe fn _mm512_mask_cvtusepi16_epi8(
    src: __m256i,
    k: __mmask32,
    a: __m512i
) -> __m256i
🔬This is a nightly-only experimental API. (stdarch_x86_avx512 #111137)
Available on (x86 or x86-64) and target feature avx512bw and x86-64 only.
Expand description

Convert packed unsigned 16-bit integers in a to packed unsigned 8-bit integers with unsigned saturation, 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