Function _mm512_maskz_mullo_epi16 

pub fn _mm512_maskz_mullo_epi16(k: __mmask32, a: __m512i, b: __m512i) -> __m512i

Available on x86-64 and target feature avx512bw only.

Multiply the packed 16-bit integers in a and b, producing intermediate 32-bit integers, and store the low 16 bits of the intermediate integers in dst using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

Intel’s documentation