Remove netcore/ directory from the mono/mono repository. (#20361)

1 files changed, 0 insertions, 554 deletions

diff --git a/netcore/System.Private.CoreLib/shared/System/Buffer.cs b/netcore/System.Private.CoreLib/shared/System/Buffer.cs
deleted file mode 100644
index 18064bca07a..00000000000
--- a/netcore/System.Private.CoreLib/shared/System/Buffer.cs
+++ /dev/null
@@ -1,554 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-#if AMD64 || ARM64 || (BIT32 && !ARM)
-#define HAS_CUSTOM_BLOCKS
-#endif
-
-using System.Diagnostics;
-using System.Runtime;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-using Internal.Runtime.CompilerServices;
-
-#pragma warning disable SA1121 // explicitly using type aliases instead of built-in types
-#if BIT64
-using nint = System.Int64;
-using nuint = System.UInt64;
-#else
-using nint = System.Int32;
-using nuint = System.UInt32;
-#endif
-
-namespace System
-{
-    public static partial class Buffer
-    {
-        // Copies from one primitive array to another primitive array without
-        // respecting types.  This calls memmove internally.  The count and
-        // offset parameters here are in bytes.  If you want to use traditional
-        // array element indices and counts, use Array.Copy.
-        public static unsafe void BlockCopy(Array src, int srcOffset, Array dst, int dstOffset, int count)
-        {
-            if (src == null)
-                throw new ArgumentNullException(nameof(src));
-            if (dst == null)
-                throw new ArgumentNullException(nameof(dst));
-
-            nuint uSrcLen = (nuint)src.LongLength;
-            if (src.GetType() != typeof(byte[]))
-            {
-                if (!src.GetCorElementTypeOfElementType().IsPrimitiveType())
-                    throw new ArgumentException(SR.Arg_MustBePrimArray, nameof(src));
-                uSrcLen *= (nuint)src.GetElementSize();
-            }
-
-            nuint uDstLen = uSrcLen;
-            if (src != dst)
-            {
-                uDstLen = (nuint)dst.LongLength;
-                if (dst.GetType() != typeof(byte[]))
-                {
-                    if (!dst.GetCorElementTypeOfElementType().IsPrimitiveType())
-                        throw new ArgumentException(SR.Arg_MustBePrimArray, nameof(dst));
-                    uDstLen *= (nuint)dst.GetElementSize();
-                }
-            }
-
-            if (srcOffset < 0)
-                throw new ArgumentOutOfRangeException(nameof(srcOffset), SR.ArgumentOutOfRange_MustBeNonNegInt32);
-            if (dstOffset < 0)
-                throw new ArgumentOutOfRangeException(nameof(dstOffset), SR.ArgumentOutOfRange_MustBeNonNegInt32);
-            if (count < 0)
-                throw new ArgumentOutOfRangeException(nameof(count), SR.ArgumentOutOfRange_MustBeNonNegInt32);
-
-            nuint uCount = (nuint)count;
-            nuint uSrcOffset = (nuint)srcOffset;
-            nuint uDstOffset = (nuint)dstOffset;
-
-            if ((uSrcLen < uSrcOffset + uCount) || (uDstLen < uDstOffset + uCount))
-                throw new ArgumentException(SR.Argument_InvalidOffLen);
-
-            Memmove(ref Unsafe.AddByteOffset(ref dst.GetRawArrayData(), uDstOffset), ref Unsafe.AddByteOffset(ref src.GetRawArrayData(), uSrcOffset), uCount);
-        }
-
-        public static int ByteLength(Array array)
-        {
-            // Is the array present?
-            if (array == null)
-                throw new ArgumentNullException(nameof(array));
-
-            // Is it of primitive types?
-            if (!array.GetCorElementTypeOfElementType().IsPrimitiveType())
-                throw new ArgumentException(SR.Arg_MustBePrimArray, nameof(array));
-
-            nuint byteLength = (nuint)array.LongLength * (nuint)array.GetElementSize();
-
-            // This API is explosed both as Buffer.ByteLength and also used indirectly in argument
-            // checks for Buffer.GetByte/SetByte.
-            //
-            // If somebody called Get/SetByte on 2GB+ arrays, there is a decent chance that
-            // the computation of the index has overflowed. Thus we intentionally always
-            // throw on 2GB+ arrays in Get/SetByte argument checks (even for indicies <2GB)
-            // to prevent people from running into a trap silently.
-
-            return checked((int)byteLength);
-        }
-
-        public static byte GetByte(Array array, int index)
-        {
-            // array argument validation done via ByteLength
-            if ((uint)index >= (uint)ByteLength(array))
-                throw new ArgumentOutOfRangeException(nameof(index));
-
-            return Unsafe.Add<byte>(ref array.GetRawArrayData(), index);
-        }
-
-        public static void SetByte(Array array, int index, byte value)
-        {
-            // array argument validation done via ByteLength
-            if ((uint)index >= (uint)ByteLength(array))
-                throw new ArgumentOutOfRangeException(nameof(index));
-
-            Unsafe.Add<byte>(ref array.GetRawArrayData(), index) = value;
-        }
-
-        // This method has different signature for x64 and other platforms and is done for performance reasons.
-        internal static unsafe void ZeroMemory(byte* dest, nuint len)
-        {
-            SpanHelpers.ClearWithoutReferences(ref *dest, len);
-        }
-
-        // The attributes on this method are chosen for best JIT performance.
-        // Please do not edit unless intentional.
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        [CLSCompliant(false)]
-        public static unsafe void MemoryCopy(void* source, void* destination, long destinationSizeInBytes, long sourceBytesToCopy)
-        {
-            if (sourceBytesToCopy > destinationSizeInBytes)
-            {
-                ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.sourceBytesToCopy);
-            }
-            Memmove((byte*)destination, (byte*)source, checked((nuint)sourceBytesToCopy));
-        }
-
-        // The attributes on this method are chosen for best JIT performance.
-        // Please do not edit unless intentional.
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        [CLSCompliant(false)]
-        public static unsafe void MemoryCopy(void* source, void* destination, ulong destinationSizeInBytes, ulong sourceBytesToCopy)
-        {
-            if (sourceBytesToCopy > destinationSizeInBytes)
-            {
-                ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.sourceBytesToCopy);
-            }
-            Memmove((byte*)destination, (byte*)source, checked((nuint)sourceBytesToCopy));
-        }
-
-        // This method has different signature for x64 and other platforms and is done for performance reasons.
-        internal static unsafe void Memmove(byte* dest, byte* src, nuint len)
-        {
-            // P/Invoke into the native version when the buffers are overlapping.
-            if (((nuint)dest - (nuint)src < len) || ((nuint)src - (nuint)dest < len))
-            {
-                goto PInvoke;
-            }
-
-            byte* srcEnd = src + len;
-            byte* destEnd = dest + len;
-
-            if (len <= 16) goto MCPY02;
-            if (len > 64) goto MCPY05;
-
-        MCPY00:
-            // Copy bytes which are multiples of 16 and leave the remainder for MCPY01 to handle.
-            Debug.Assert(len > 16 && len <= 64);
-#if HAS_CUSTOM_BLOCKS
-            *(Block16*)dest = *(Block16*)src;                   // [0,16]
-#elif BIT64
-            *(long*)dest = *(long*)src;
-            *(long*)(dest + 8) = *(long*)(src + 8);             // [0,16]
-#else
-            *(int*)dest = *(int*)src;
-            *(int*)(dest + 4) = *(int*)(src + 4);
-            *(int*)(dest + 8) = *(int*)(src + 8);
-            *(int*)(dest + 12) = *(int*)(src + 12);             // [0,16]
-#endif
-            if (len <= 32) goto MCPY01;
-#if HAS_CUSTOM_BLOCKS
-            *(Block16*)(dest + 16) = *(Block16*)(src + 16);     // [0,32]
-#elif BIT64
-            *(long*)(dest + 16) = *(long*)(src + 16);
-            *(long*)(dest + 24) = *(long*)(src + 24);           // [0,32]
-#else
-            *(int*)(dest + 16) = *(int*)(src + 16);
-            *(int*)(dest + 20) = *(int*)(src + 20);
-            *(int*)(dest + 24) = *(int*)(src + 24);
-            *(int*)(dest + 28) = *(int*)(src + 28);             // [0,32]
-#endif
-            if (len <= 48) goto MCPY01;
-#if HAS_CUSTOM_BLOCKS
-            *(Block16*)(dest + 32) = *(Block16*)(src + 32);     // [0,48]
-#elif BIT64
-            *(long*)(dest + 32) = *(long*)(src + 32);
-            *(long*)(dest + 40) = *(long*)(src + 40);           // [0,48]
-#else
-            *(int*)(dest + 32) = *(int*)(src + 32);
-            *(int*)(dest + 36) = *(int*)(src + 36);
-            *(int*)(dest + 40) = *(int*)(src + 40);
-            *(int*)(dest + 44) = *(int*)(src + 44);             // [0,48]
-#endif
-
-        MCPY01:
-            // Unconditionally copy the last 16 bytes using destEnd and srcEnd and return.
-            Debug.Assert(len > 16 && len <= 64);
-#if HAS_CUSTOM_BLOCKS
-            *(Block16*)(destEnd - 16) = *(Block16*)(srcEnd - 16);
-#elif BIT64
-            *(long*)(destEnd - 16) = *(long*)(srcEnd - 16);
-            *(long*)(destEnd - 8) = *(long*)(srcEnd - 8);
-#else
-            *(int*)(destEnd - 16) = *(int*)(srcEnd - 16);
-            *(int*)(destEnd - 12) = *(int*)(srcEnd - 12);
-            *(int*)(destEnd - 8) = *(int*)(srcEnd - 8);
-            *(int*)(destEnd - 4) = *(int*)(srcEnd - 4);
-#endif
-            return;
-
-        MCPY02:
-            // Copy the first 8 bytes and then unconditionally copy the last 8 bytes and return.
-            if ((len & 24) == 0) goto MCPY03;
-            Debug.Assert(len >= 8 && len <= 16);
-#if BIT64
-            *(long*)dest = *(long*)src;
-            *(long*)(destEnd - 8) = *(long*)(srcEnd - 8);
-#else
-            *(int*)dest = *(int*)src;
-            *(int*)(dest + 4) = *(int*)(src + 4);
-            *(int*)(destEnd - 8) = *(int*)(srcEnd - 8);
-            *(int*)(destEnd - 4) = *(int*)(srcEnd - 4);
-#endif
-            return;
-
-        MCPY03:
-            // Copy the first 4 bytes and then unconditionally copy the last 4 bytes and return.
-            if ((len & 4) == 0) goto MCPY04;
-            Debug.Assert(len >= 4 && len < 8);
-            *(int*)dest = *(int*)src;
-            *(int*)(destEnd - 4) = *(int*)(srcEnd - 4);
-            return;
-
-            MCPY04:
-            // Copy the first byte. For pending bytes, do an unconditionally copy of the last 2 bytes and return.
-            Debug.Assert(len < 4);
-            if (len == 0) return;
-            *dest = *src;
-            if ((len & 2) == 0) return;
-            *(short*)(destEnd - 2) = *(short*)(srcEnd - 2);
-            return;
-
-            MCPY05:
-            // PInvoke to the native version when the copy length exceeds the threshold.
-            if (len > MemmoveNativeThreshold)
-            {
-                goto PInvoke;
-            }
-
-            // Copy 64-bytes at a time until the remainder is less than 64.
-            // If remainder is greater than 16 bytes, then jump to MCPY00. Otherwise, unconditionally copy the last 16 bytes and return.
-            Debug.Assert(len > 64 && len <= MemmoveNativeThreshold);
-            nuint n = len >> 6;
-
-        MCPY06:
-#if HAS_CUSTOM_BLOCKS
-            *(Block64*)dest = *(Block64*)src;
-#elif BIT64
-            *(long*)dest = *(long*)src;
-            *(long*)(dest + 8) = *(long*)(src + 8);
-            *(long*)(dest + 16) = *(long*)(src + 16);
-            *(long*)(dest + 24) = *(long*)(src + 24);
-            *(long*)(dest + 32) = *(long*)(src + 32);
-            *(long*)(dest + 40) = *(long*)(src + 40);
-            *(long*)(dest + 48) = *(long*)(src + 48);
-            *(long*)(dest + 56) = *(long*)(src + 56);
-#else
-            *(int*)dest = *(int*)src;
-            *(int*)(dest + 4) = *(int*)(src + 4);
-            *(int*)(dest + 8) = *(int*)(src + 8);
-            *(int*)(dest + 12) = *(int*)(src + 12);
-            *(int*)(dest + 16) = *(int*)(src + 16);
-            *(int*)(dest + 20) = *(int*)(src + 20);
-            *(int*)(dest + 24) = *(int*)(src + 24);
-            *(int*)(dest + 28) = *(int*)(src + 28);
-            *(int*)(dest + 32) = *(int*)(src + 32);
-            *(int*)(dest + 36) = *(int*)(src + 36);
-            *(int*)(dest + 40) = *(int*)(src + 40);
-            *(int*)(dest + 44) = *(int*)(src + 44);
-            *(int*)(dest + 48) = *(int*)(src + 48);
-            *(int*)(dest + 52) = *(int*)(src + 52);
-            *(int*)(dest + 56) = *(int*)(src + 56);
-            *(int*)(dest + 60) = *(int*)(src + 60);
-#endif
-            dest += 64;
-            src += 64;
-            n--;
-            if (n != 0) goto MCPY06;
-
-            len %= 64;
-            if (len > 16) goto MCPY00;
-#if HAS_CUSTOM_BLOCKS
-            *(Block16*)(destEnd - 16) = *(Block16*)(srcEnd - 16);
-#elif BIT64
-            *(long*)(destEnd - 16) = *(long*)(srcEnd - 16);
-            *(long*)(destEnd - 8) = *(long*)(srcEnd - 8);
-#else
-            *(int*)(destEnd - 16) = *(int*)(srcEnd - 16);
-            *(int*)(destEnd - 12) = *(int*)(srcEnd - 12);
-            *(int*)(destEnd - 8) = *(int*)(srcEnd - 8);
-            *(int*)(destEnd - 4) = *(int*)(srcEnd - 4);
-#endif
-            return;
-
-        PInvoke:
-            _Memmove(dest, src, len);
-        }
-
-        // This method has different signature for x64 and other platforms and is done for performance reasons.
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal static void Memmove<T>(ref T destination, ref T source, nuint elementCount)
-        {
-            if (!RuntimeHelpers.IsReferenceOrContainsReferences<T>())
-            {
-                // Blittable memmove
-
-                Memmove(
-                    ref Unsafe.As<T, byte>(ref destination),
-                    ref Unsafe.As<T, byte>(ref source),
-                    elementCount * (nuint)Unsafe.SizeOf<T>());
-            }
-            else
-            {
-                // Non-blittable memmove
-                BulkMoveWithWriteBarrier(
-                    ref Unsafe.As<T, byte>(ref destination),
-                    ref Unsafe.As<T, byte>(ref source),
-                    elementCount * (nuint)Unsafe.SizeOf<T>());
-            }
-        }
-
-        // This method has different signature for x64 and other platforms and is done for performance reasons.
-        private static void Memmove(ref byte dest, ref byte src, nuint len)
-        {
-            // P/Invoke into the native version when the buffers are overlapping.
-            if (((nuint)Unsafe.ByteOffset(ref src, ref dest) < len) || ((nuint)Unsafe.ByteOffset(ref dest, ref src) < len))
-            {
-                goto BuffersOverlap;
-            }
-
-            // Use "(IntPtr)(nint)len" to avoid overflow checking on the explicit cast to IntPtr
-
-            ref byte srcEnd = ref Unsafe.Add(ref src, (IntPtr)(nint)len);
-            ref byte destEnd = ref Unsafe.Add(ref dest, (IntPtr)(nint)len);
-
-            if (len <= 16)
-                goto MCPY02;
-            if (len > 64)
-                goto MCPY05;
-
-        MCPY00:
-            // Copy bytes which are multiples of 16 and leave the remainder for MCPY01 to handle.
-            Debug.Assert(len > 16 && len <= 64);
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block16>(ref dest) = Unsafe.As<byte, Block16>(ref src); // [0,16]
-#elif BIT64
-            Unsafe.As<byte, long>(ref dest) = Unsafe.As<byte, long>(ref src);
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 8)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 8)); // [0,16]
-#else
-            Unsafe.As<byte, int>(ref dest) = Unsafe.As<byte, int>(ref src);
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 4));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 8)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 8));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 12)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 12)); // [0,16]
-#endif
-            if (len <= 32)
-                goto MCPY01;
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block16>(ref Unsafe.Add(ref dest, 16)) = Unsafe.As<byte, Block16>(ref Unsafe.Add(ref src, 16)); // [0,32]
-#elif BIT64
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 16)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 16));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 24)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 24)); // [0,32]
-#else
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 16)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 16));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 20)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 20));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 24)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 24));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 28)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 28)); // [0,32]
-#endif
-            if (len <= 48)
-                goto MCPY01;
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block16>(ref Unsafe.Add(ref dest, 32)) = Unsafe.As<byte, Block16>(ref Unsafe.Add(ref src, 32)); // [0,48]
-#elif BIT64
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 32)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 32));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 40)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 40)); // [0,48]
-#else
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 32)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 32));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 36)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 36));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 40)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 40));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 44)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 44)); // [0,48]
-#endif
-
-        MCPY01:
-            // Unconditionally copy the last 16 bytes using destEnd and srcEnd and return.
-            Debug.Assert(len > 16 && len <= 64);
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block16>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, Block16>(ref Unsafe.Add(ref srcEnd, -16));
-#elif BIT64
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref srcEnd, -16));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref srcEnd, -8));
-#else
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -16));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -12)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -12));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -8));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -4));
-#endif
-            return;
-
-        MCPY02:
-            // Copy the first 8 bytes and then unconditionally copy the last 8 bytes and return.
-            if ((len & 24) == 0)
-                goto MCPY03;
-            Debug.Assert(len >= 8 && len <= 16);
-#if BIT64
-            Unsafe.As<byte, long>(ref dest) = Unsafe.As<byte, long>(ref src);
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref srcEnd, -8));
-#else
-            Unsafe.As<byte, int>(ref dest) = Unsafe.As<byte, int>(ref src);
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 4));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -8));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -4));
-#endif
-            return;
-
-        MCPY03:
-            // Copy the first 4 bytes and then unconditionally copy the last 4 bytes and return.
-            if ((len & 4) == 0)
-                goto MCPY04;
-            Debug.Assert(len >= 4 && len < 8);
-            Unsafe.As<byte, int>(ref dest) = Unsafe.As<byte, int>(ref src);
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -4));
-            return;
-
-        MCPY04:
-            // Copy the first byte. For pending bytes, do an unconditionally copy of the last 2 bytes and return.
-            Debug.Assert(len < 4);
-            if (len == 0)
-                return;
-            dest = src;
-            if ((len & 2) == 0)
-                return;
-            Unsafe.As<byte, short>(ref Unsafe.Add(ref destEnd, -2)) = Unsafe.As<byte, short>(ref Unsafe.Add(ref srcEnd, -2));
-            return;
-
-        MCPY05:
-            // PInvoke to the native version when the copy length exceeds the threshold.
-            if (len > MemmoveNativeThreshold)
-            {
-                goto PInvoke;
-            }
-
-            // Copy 64-bytes at a time until the remainder is less than 64.
-            // If remainder is greater than 16 bytes, then jump to MCPY00. Otherwise, unconditionally copy the last 16 bytes and return.
-            Debug.Assert(len > 64 && len <= MemmoveNativeThreshold);
-            nuint n = len >> 6;
-
-        MCPY06:
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block64>(ref dest) = Unsafe.As<byte, Block64>(ref src);
-#elif BIT64
-            Unsafe.As<byte, long>(ref dest) = Unsafe.As<byte, long>(ref src);
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 8)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 8));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 16)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 16));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 24)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 24));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 32)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 32));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 40)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 40));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 48)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 48));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref dest, 56)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref src, 56));
-#else
-            Unsafe.As<byte, int>(ref dest) = Unsafe.As<byte, int>(ref src);
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 4));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 8)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 8));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 12)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 12));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 16)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 16));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 20)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 20));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 24)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 24));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 28)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 28));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 32)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 32));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 36)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 36));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 40)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 40));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 44)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 44));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 48)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 48));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 52)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 52));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 56)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 56));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref dest, 60)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref src, 60));
-#endif
-            dest = ref Unsafe.Add(ref dest, 64);
-            src = ref Unsafe.Add(ref src, 64);
-            n--;
-            if (n != 0)
-                goto MCPY06;
-
-            len %= 64;
-            if (len > 16)
-                goto MCPY00;
-#if HAS_CUSTOM_BLOCKS
-            Unsafe.As<byte, Block16>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, Block16>(ref Unsafe.Add(ref srcEnd, -16));
-#elif BIT64
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref srcEnd, -16));
-            Unsafe.As<byte, long>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, long>(ref Unsafe.Add(ref srcEnd, -8));
-#else
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -16)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -16));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -12)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -12));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -8)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -8));
-            Unsafe.As<byte, int>(ref Unsafe.Add(ref destEnd, -4)) = Unsafe.As<byte, int>(ref Unsafe.Add(ref srcEnd, -4));
-#endif
-            return;
-
-        BuffersOverlap:
-            // If the buffers overlap perfectly, there's no point to copying the data.
-            if (Unsafe.AreSame(ref dest, ref src))
-            {
-                return;
-            }
-
-        PInvoke:
-            _Memmove(ref dest, ref src, len);
-        }
-
-        // Non-inlinable wrapper around the QCall that avoids polluting the fast path
-        // with P/Invoke prolog/epilog.
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private static unsafe void _Memmove(byte* dest, byte* src, nuint len)
-        {
-            __Memmove(dest, src, len);
-        }
-
-        // Non-inlinable wrapper around the QCall that avoids polluting the fast path
-        // with P/Invoke prolog/epilog.
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private static unsafe void _Memmove(ref byte dest, ref byte src, nuint len)
-        {
-            fixed (byte* pDest = &dest)
-            fixed (byte* pSrc = &src)
-                __Memmove(pDest, pSrc, len);
-        }
-
-#if HAS_CUSTOM_BLOCKS
-        [StructLayout(LayoutKind.Sequential, Size = 16)]
-        private struct Block16 { }
-
-        [StructLayout(LayoutKind.Sequential, Size = 64)]
-        private struct Block64 { }
-#endif // HAS_CUSTOM_BLOCKS
-    }
-}