Function _mm256_maskz_cvtepu64_pd 

pub fn _mm256_maskz_cvtepu64_pd(k: __mmask8, a: __m256i) -> __m256d

Available on x86-64 and target feature avx512dq and target feature avx512vl only.

Convert packed unsigned 64-bit integers in a to packed double-precision (64-bit) floating-point elements, and store the results in dst using zeromask k (elements are zeroed out if the corresponding bit is not set).

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