Function _mm_mask_fmaddsub_ph

#[target_feature(enable = "avx512fp16", enable = "avx512vl")]
pub const fn _mm_mask_fmaddsub_ph(a: __m128h, k: __mmask8, b: __m128h, c: __m128h) -> __m128h

Multiply packed half-precision (16-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 (the element is copied from a when the corresponding mask bit is not set).

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