Function _mm256_mask_packus_epi16
#[target_feature(enable = "avx512bw", enable = "avx512vl")]
pub fn _mm256_mask_packus_epi16(src: __m256i, k: __mmask32, a: __m256i, b: __m256i) -> __m256iConvert packed signed 16-bit integers from a and b to packed 8-bit integers using unsigned saturation, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).