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/Arm32/ScopedRegister.cs

@@ -0,0 +1,39 @@
+using Ryujinx.Cpu.LightningJit.CodeGen;
+using System;
+
+namespace Ryujinx.Cpu.LightningJit.Arm32
+{
+    readonly struct ScopedRegister : IDisposable
+    {
+        private readonly RegisterAllocator _registerAllocator;
+        private readonly Operand _operand;
+        private readonly bool _isAllocated;
+
+        public readonly Operand Operand => _operand;
+        public readonly bool IsAllocated => _isAllocated;
+
+        public ScopedRegister(RegisterAllocator registerAllocator, Operand operand, bool isAllocated = true)
+        {
+            _registerAllocator = registerAllocator;
+            _operand = operand;
+            _isAllocated = isAllocated;
+        }
+
+        public readonly void Dispose()
+        {
+            if (!_isAllocated)
+            {
+                return;
+            }
+
+            if (_operand.Type.IsInteger())
+            {
+                _registerAllocator.FreeTempGprRegister(_operand.AsInt32());
+            }
+            else
+            {
+                _registerAllocator.FreeTempFpSimdRegister(_operand.AsInt32());
+            }
+        }
+    }
+}