Function _mm256_mask_scalef_ps 

pub fn _mm256_mask_scalef_ps(
    src: __m256,
    k: __mmask8,
    a: __m256,
    b: __m256,
) -> __m256

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

Scale the packed single-precision (32-bit) floating-point elements in a using values from 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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