SequenceCompareTo() [2/2]

static unsafe int System.SpanHelpers.SequenceCompareTo ( ref char first, int firstLength, ref char second, int secondLength )

inlinestatic

Definition at line 1656 of file SpanHelpers.cs.

    {
        int result = firstLength - secondLength;
        if (!Unsafe.AreSame(ref first, ref second))
        {
            nuint num = (uint)(((uint)firstLength < (uint)secondLength) ? firstLength : secondLength);
            nuint num2 = 0u;
            if (num >= (nuint)(sizeof(UIntPtr) / 2))
            {
                if (Vector.IsHardwareAccelerated && num >= (nuint)Vector<ushort>.Count)
                {
                    nuint num3 = num - (nuint)Vector<ushort>.Count;
                    while (!(Unsafe.ReadUnaligned<Vector<ushort>>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref first, (nint)num2))) != Unsafe.ReadUnaligned<Vector<ushort>>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref second, (nint)num2)))))
                    {
                        num2 += (nuint)Vector<ushort>.Count;
                        if (num3 < num2)
                        {
                            break;
                        }
                    }
                }
                for (; num >= (nuint)((nint)num2 + (nint)(sizeof(UIntPtr) / 2)) && Unsafe.ReadUnaligned<UIntPtr>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref first, (nint)num2))) == Unsafe.ReadUnaligned<UIntPtr>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref second, (nint)num2))); num2 += (nuint)(sizeof(UIntPtr) / 2))
                {
                }
            }
            if (num >= num2 + 2 && Unsafe.ReadUnaligned<int>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref first, (nint)num2))) == Unsafe.ReadUnaligned<int>(ref Unsafe.As<char, byte>(ref Unsafe.Add(ref second, (nint)num2))))
            {
                num2 += 2;
            }
            for (; num2 < num; num2++)
            {
                int num4 = Unsafe.Add(ref first, (nint)num2).CompareTo(Unsafe.Add(ref second, (nint)num2));
                if (num4 != 0)
                {
                    return num4;
                }
            }
        }
        return result;
    }

References System.Collections.Generic.Dictionary< TKey, TValue >.Count, and System.Numerics.Vector< T >.IsHardwareAccelerated.