Function _mm512_maskz_sra_epi64 

pub fn _mm512_maskz_sra_epi64(
    k: __mmask8,
    a: __m512i,
    count: __m128i,
) -> __m512i

Available on x86-64 and target feature avx512f only.

Shift packed 64-bit integers in a right by count while shifting in sign bits, 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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