Function _mm512_maskz_add_ph 

pub fn _mm512_maskz_add_ph(k: __mmask32, a: __m512h, b: __m512h) -> __m512h

Available on x86 and target feature avx512fp16 only.

Add packed half-precision (16-bit) floating-point elements in a and b, and store the results in dst using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

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