Function _mm512_mask_maddubs_epi16
#[target_feature(enable = "avx512bw")]
pub fn _mm512_mask_maddubs_epi16(src: __m512i, k: __mmask32, a: __m512i, b: __m512i) -> __m512iMultiply packed unsigned 8-bit integers in a by packed signed 8-bit integers in b, producing intermediate signed 16-bit integers. Horizontally add adjacent pairs of intermediate signed 16-bit integers, and pack the saturated results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).