Function _mm512_mask_compressstoreu_epi8 

pub unsafe fn _mm512_mask_compressstoreu_epi8(
    base_addr: *mut i8,
    k: __mmask64,
    a: __m512i,
)

Available on x86-64 and target feature avx512vbmi2 only.

Contiguously store the active 8-bit integers in a (those with their respective bit set in writemask k) to unaligned memory at base_addr.

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