Function _mm256_rsqrt_ph
#[target_feature(enable = "avx512fp16", enable = "avx512vl")]
pub fn _mm256_rsqrt_ph(a: __m256h) -> __m256hCompute the approximate reciprocal square root of packed half-precision (16-bit) floating-point
elements in a, and store the results in dst.
The maximum relative error for this approximation is less than 1.5*2^-12.