LessThan.cs

LessThan.cs

        [MethodImpl(MethodImplOptions.AggressiveOptimization)]
        public unsafe static int GreaterThanSimd_Avx2_u(int boundary,ref ReadOnlySpan<int> array)
        {
            Vector128<int> xmm1 = Vector128.Create(boundary);
            Vector128<int> xmm2 = Vector128<int>.Zero;
            Vector128<int> xmm3;
            Vector128<int> xmm4;
            ref int start = ref MemoryMarshal.GetReference(array);
            for (nuint i = 0; i < (nuint)array.Length; i += 4)
            {
                xmm3 = Vector128.LoadUnsafe(ref start, i);
                xmm4 = Sse2.CompareLessThan(xmm3, xmm1);
                xmm2 = Avx2.Subtract(xmm2, xmm4);
            }
            xmm2 += Vector128.Shuffle(xmm2, Vector128.Create(1, 0, 3, 2));
            Vector128<int> shuffle2 = Vector128.Shuffle(xmm2, Vector128.Create(2, 3, 0, 1));
            xmm2 += shuffle2;
            return xmm2[0];
        }