pub unsafe fn _mm256_mask_cvtepi16_epi8(
    src: __m128i,
    k: u16,
    a: __m256i
) -> __m128i
🔬 This is a nightly-only experimental API. (stdsimd)
This is supported on x86-64 and target feature avx512bw,avx512vl only.
Expand description

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