Function _mm256_mask_permutexvar_ps
#[target_feature(enable = "avx512f", enable = "avx512vl")]
pub fn _mm256_mask_permutexvar_ps(src: __m256, k: __mmask8, idx: __m256i, a: __m256) -> __m256Shuffle single-precision (32-bit) floating-point elements in a across lanes using the corresponding index in idx, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).