Move solution and projects to src

src/ARMeilleure/CodeGen/RegisterAllocators/RegisterMasks.cs

@@ -0,0 +1,50 @@
+using ARMeilleure.IntermediateRepresentation;
+using System;
+
+namespace ARMeilleure.CodeGen.RegisterAllocators
+{
+    readonly struct RegisterMasks
+    {
+        public int IntAvailableRegisters   { get; }
+        public int VecAvailableRegisters   { get; }
+        public int IntCallerSavedRegisters { get; }
+        public int VecCallerSavedRegisters { get; }
+        public int IntCalleeSavedRegisters { get; }
+        public int VecCalleeSavedRegisters { get; }
+        public int RegistersCount { get; }
+
+        public RegisterMasks(
+            int intAvailableRegisters,
+            int vecAvailableRegisters,
+            int intCallerSavedRegisters,
+            int vecCallerSavedRegisters,
+            int intCalleeSavedRegisters,
+            int vecCalleeSavedRegisters,
+            int registersCount)
+        {
+            IntAvailableRegisters   = intAvailableRegisters;
+            VecAvailableRegisters   = vecAvailableRegisters;
+            IntCallerSavedRegisters = intCallerSavedRegisters;
+            VecCallerSavedRegisters = vecCallerSavedRegisters;
+            IntCalleeSavedRegisters = intCalleeSavedRegisters;
+            VecCalleeSavedRegisters = vecCalleeSavedRegisters;
+            RegistersCount          = registersCount;
+        }
+
+        public int GetAvailableRegisters(RegisterType type)
+        {
+            if (type == RegisterType.Integer)
+            {
+                return IntAvailableRegisters;
+            }
+            else if (type == RegisterType.Vector)
+            {
+                return VecAvailableRegisters;
+            }
+            else
+            {
+                throw new ArgumentException($"Invalid register type \"{type}\".");
+            }
+        }
+    }
+}