Implement a new JIT for Arm devices (#6057)

* Implement a new JIT for Arm devices

* Auto-format

* Make a lot of Assembler members read-only

* More read-only

* Fix more warnings

* ObjectDisposedException.ThrowIf

* New JIT cache for platforms that enforce W^X, currently unused

* Remove unused using

* Fix assert

* Pass memory manager type around

* Safe memory manager mode support + other improvements

* Actual safe memory manager mode masking support

* PR feedback

src/Ryujinx.Cpu/LightningJit/CodeGen/Operand.cs

@@ -0,0 +1,38 @@
+using System.Diagnostics;
+
+namespace Ryujinx.Cpu.LightningJit.CodeGen
+{
+    readonly struct Operand
+    {
+        public readonly OperandKind Kind { get; }
+        public readonly OperandType Type { get; }
+        public readonly ulong Value { get; }
+
+        public Operand(OperandKind kind, OperandType type, ulong value)
+        {
+            Kind = kind;
+            Type = type;
+            Value = value;
+        }
+
+        public Operand(int index, RegisterType regType, OperandType type) : this(OperandKind.Register, type, (ulong)((int)regType << 24 | index))
+        {
+        }
+
+        public Operand(OperandType type, ulong value) : this(OperandKind.Constant, type, value)
+        {
+        }
+
+        public readonly Register GetRegister()
+        {
+            Debug.Assert(Kind == OperandKind.Register);
+
+            return new Register((int)Value & 0xffffff, (RegisterType)(Value >> 24));
+        }
+
+        public readonly int AsInt32()
+        {
+            return (int)Value;
+        }
+    }
+}