Misc. CPU optimizations (#575)

* Add optimizations related to caller/callee saved registers, thread synchronization and disable tier 0

* Refactoring

* Add a config entry to enable or disable the reg load/store opt.

* Remove unnecessary register state stores for calls when the callee is know

* Rename IoType to VarType

* Enable tier 0 while fixing some perf issues related to tier 0

* Small tweak -- Compile before adding to the cache, to avoid lags

* Add required config entry

Ryujinx/Config.jsonc

@@ -29,18 +29,21 @@
     // System Language list: https://gist.github.com/HorrorTroll/b6e4a88d774c3c9b3bdf54d79a7ca43b
     "system_language": "AmericanEnglish",
 
-    // Enable or Disable Docked Mode
+    // Enable or disable Docked Mode
     "docked_mode": false,
-    
-    // Enable or Disable Game Vsync
+
+    // Enable or disable Game Vsync
     "enable_vsync": true,
-    
-    // Enable or Disable Multi-core scheduling of threads
+
+    // Enable or disable Multi-core scheduling of threads
     "enable_multicore_scheduling": true,
-    
+
     // Enable integrity checks on Switch content files
     "enable_fs_integrity_checks": true,
-    
+
+    // Enable or disable aggressive CPU optimizations
+    "enable_aggressive_cpu_opts": true,
+
     // The primary controller's type
     // Supported Values: Handheld, ProController, NpadPair, NpadLeft, NpadRight
     "controller_type": "Handheld",

Ryujinx/Configuration.cs

@@ -86,6 +86,11 @@ namespace Ryujinx
         /// </summary>
         public bool EnableFsIntegrityChecks { get; private set; }
 
+        /// <summary>
+        /// Enable or Disable aggressive CPU optimizations
+        /// </summary>
+        public bool EnableAggressiveCpuOpts { get; private set; }
+
         /// <summary>
         ///  The primary controller's type
         /// </summary>
@@ -197,6 +202,11 @@ namespace Ryujinx
                 ? IntegrityCheckLevel.ErrorOnInvalid
                 : IntegrityCheckLevel.None;
 
+            if (Instance.EnableAggressiveCpuOpts)
+            {
+                Optimizations.AssumeStrictAbiCompliance = true;
+            }
+
             if(Instance.GamepadControls.Enabled)
             {
                 if (GamePad.GetName(Instance.GamepadControls.Index) == "Unmapped Controller")

Ryujinx/_schema.json

@@ -17,6 +17,7 @@
     "enable_vsync",
     "enable_multicore_scheduling",
     "enable_fs_integrity_checks",
+    "enable_aggressive_cpu_opts",
     "controller_type",
     "keyboard_controls",
     "gamepad_controls"
@@ -399,6 +400,17 @@
         false
       ]
     },
+    "enable_aggressive_cpu_opts": {
+      "$id": "#/properties/enable_aggressive_cpu_opts",
+      "type": "boolean",
+      "title": "Enable Aggressive CPU Optimizations",
+      "description": "Enable or disable aggressive CPU optimizations",
+      "default": true,
+      "examples": [
+        true,
+        false
+      ]
+    },
     "controller_type": {
       "$id": "#/properties/controller_type",
       "type": "string",