Function _mm256_mask_sllv_epi32 

pub fn _mm256_mask_sllv_epi32(
    src: __m256i,
    k: __mmask8,
    a: __m256i,
    count: __m256i,
) -> __m256i

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

Shift packed 32-bit integers in a left by the amount specified by the corresponding element in count while shifting in zeros, 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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