Function _mm_mask_fmul_sch
#[target_feature(enable = "avx512fp16")]
pub fn _mm_mask_fmul_sch(src: __m128h, k: __mmask8, a: __m128h, b: __m128h) -> __m128hMultiply the lower complex numbers in a and b, and store the results in dst using writemask k (the element
is copied from src when mask bit 0 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].