Function `_mm512_mask_permutevar_pd`

#[target_feature(enable = "avx512f")]
pub fn _mm512_mask_permutevar_pd(src: __m512d, k: __mmask8, a: __m512d, b: __m512i) -> __m512d

Shuffle double-precision (64-bit) floating-point elements in a within 128-bit lanes using the control in b, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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