Function _mm256_mask_abs_epi64 

pub fn _mm256_mask_abs_epi64(src: __m256i, k: __mmask8, a: __m256i) -> __m256i

Available on x86-64 and target feature avx512f and target feature avx512vl only.

Compute the absolute value of packed signed 64-bit integers in a, and store the unsigned results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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