Function `_mm512_mask_packs_epi16`

#[target_feature(enable = "avx512bw")]
pub fn _mm512_mask_packs_epi16(src: __m512i, k: __mmask64, a: __m512i, b: __m512i) -> __m512i

Convert packed signed 16-bit integers from a and b to packed 8-bit integers using signed saturation, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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