add from giga-device, new branch added

StgSharp.Common/HighPerformance/M64.cs

@@ -0,0 +1,106 @@
+//-----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+// file="M64.cs"
+// Project: StgSharp
+// AuthorGroup: Nitload Space
+// Copyright (c) Nitload Space. All rights reserved.
+//     
+// Permission is hereby granted, free of charge, to any person 
+// obtaining a copy of this software and associated documentation 
+// files (the “Software”), to deal in the Software without restriction, 
+// including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, 
+// and to permit persons to whom the Software is furnished to do so, 
+// subject to the following conditions:
+//     
+// The above copyright notice and 
+// this permission notice shall be included in all copies 
+// or substantial portions of the Software.
+//     
+// THE SOFTWARE IS PROVIDED “AS IS”, 
+// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+// ARISING FROM, OUT OF OR IN CONNECTION WITH 
+// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+// -----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.HighPerformance
+{
+    [StructLayout(LayoutKind.Explicit, Pack = 8)]
+    public unsafe struct M64 : IRegisterPresentation
+    {
+
+        [FieldOffset(0)] private fixed byte buffer[8];
+        [FieldOffset(0)] private ulong value;
+
+        public M64()
+        {
+            Unsafe.SkipInit(out this);
+            value = 0;
+        }
+
+        public ref T AsRef<T>() where T: unmanaged,INumber<T>
+        {
+            return ref Unsafe.As<byte, T>(ref buffer[0]);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is M64 m64 && this == m64;
+        }
+
+        public override int GetHashCode()
+        {
+            return value.GetHashCode();
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public ref T Member<T>(int index) where T: unmanaged, INumber<T>
+        {
+            return ref Unsafe.As<byte, T>(ref buffer[index * sizeof(T)]);
+        }
+
+        public static bool operator !=(M64 left, M64 right)
+        {
+            return !(left == right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static M64 operator <<(M64 m, int shift)
+        {
+            return new M64
+            {
+                value = m.value << shift
+            };
+        }
+
+        public static bool operator ==(M64 left, M64 right)
+        {
+            return left.value == right.value;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static M64 operator >>(M64 m, int shift)
+        {
+            return new M64
+            {
+                value = m.value >> shift
+            };
+        }
+
+    }
+}