Function _mm_scalef_ss
#[target_feature(enable = "avx512f")]
pub fn _mm_scalef_ss(a: __m128, b: __m128) -> __m128Scale the packed single-precision (32-bit) floating-point elements in a using values from b, store the result in the lower element of dst, and copy the upper 3 packed elements from a to the upper elements of dst.