Function _mm_maskz_fmadd_pch
#[target_feature(enable = "avx512fp16", enable = "avx512vl")]
pub fn _mm_maskz_fmadd_pch(k: __mmask8, a: __m128h, b: __m128h, c: __m128h) -> __m128hMultiply packed complex numbers in a and b, accumulate to the corresponding complex numbers in c,
and store the results in dst using zeromask k (the element is zeroed out when the corresponding mask
bit is not set). Each complex number is composed of two adjacent half-precision (16-bit) floating-point
elements, which defines the complex number complex = vec.fp16[0] + i * vec.fp16[1].