public static unsafe void Unshuffle(int bytesOfType, Span <byte> source, Span <byte> destination)
 {
     fixed(byte *src = source, dest = destination)
     {
         ShuffleAvx2.unshuffle_avx2(bytesOfType, source.Length, src, dest);
     }
 }
        public static unsafe void Unshuffle(int bytesOfType, Span <byte> source, Span <byte> destination)
        {
#if NETCOREAPP3_0
            if (Avx2.IsSupported)
            {
                ShuffleAvx2.Unshuffle(bytesOfType, source, destination);
            }

            else if (Sse2.IsSupported)
            {
                ShuffleSse2.Unshuffle(bytesOfType, source, destination);
            }

            else
#endif
            ShuffleGeneric.Unshuffle(bytesOfType, source, destination);
        }