Function _mm256_mask3_fmaddsub_pd

#[target_feature(enable = "avx512f", enable = "avx512vl")]
pub const fn _mm256_mask3_fmaddsub_pd(a: __m256d, b: __m256d, c: __m256d, k: __mmask8) -> __m256d

Multiply packed single-precision (32-bit) floating-point elements in a and b, alternatively add and subtract packed elements in c to/from the intermediate result, and store the results in dst using writemask k (elements are copied from c when the corresponding mask bit is not set).

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