Function _mm256_mask_compressstoreu_pd
#[target_feature(enable = "avx512f", enable = "avx512vl")]
pub unsafe fn _mm256_mask_compressstoreu_pd(base_addr: *mut f64, k: __mmask8, a: __m256d)Contiguously store the active double-precision (64-bit) floating-point elements in a (those with their respective bit set in writemask k) to unaligned memory at base_addr.