ARMeilleure: Move TPIDR_EL0 and TPIDRRO_EL0 to NativeContext (#4661)

* ARMeilleure: Move TPIDR_EL0 and TPIDRRO_EL0 to NativeContext

Some games access these system registers several tens of thousands of times in a second from many different threads. While this isn't really crippling, it is a lot of wasted time spent in a reverse pinvoke transition.

Example games are Pokemon Scarlet/Violet and BOTW. These games have a lot of different potential bottlenecks so it's unlikely you will see a consistent improvement, but it definitely disappears from the cpu profile.

* Remove unreachable code.

* Add ulong conversion for offsets

* Nit

3 files changed, 71 insertions, 49 deletions

diff --git a/ARMeilleure/Instructions/InstEmitSystem.cs b/ARMeilleure/Instructions/InstEmitSystem.cs
index f668b83b..f84829aa 100644
--- a/ARMeilleure/Instructions/InstEmitSystem.cs
+++ b/ARMeilleure/Instructions/InstEmitSystem.cs
@@ -33,8 +33,8 @@ namespace ARMeilleure.Instructions
                 case 0b11_011_0100_0010_000: EmitGetNzcv(context); return;
                 case 0b11_011_0100_0100_000: EmitGetFpcr(context); return;
                 case 0b11_011_0100_0100_001: EmitGetFpsr(context); return;
-                case 0b11_011_1101_0000_010: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl0)); break;
-                case 0b11_011_1101_0000_011: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrroEl0)); break;
+                case 0b11_011_1101_0000_010: EmitGetTpidrEl0(context); return;
+                case 0b11_011_1101_0000_011: EmitGetTpidrroEl0(context); return;
                 case 0b11_011_1110_0000_000: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntfrqEl0)); break;
                 case 0b11_011_1110_0000_001: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntpctEl0)); break;
                 case 0b11_011_1110_0000_010: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntvctEl0)); break;
@@ -49,19 +49,15 @@ namespace ARMeilleure.Instructions
         {
             OpCodeSystem op = (OpCodeSystem)context.CurrOp;
 
-            MethodInfo info;
-
             switch (GetPackedId(op))
             {
                 case 0b11_011_0100_0010_000: EmitSetNzcv(context); return;
                 case 0b11_011_0100_0100_000: EmitSetFpcr(context); return;
                 case 0b11_011_0100_0100_001: EmitSetFpsr(context); return;
-                case 0b11_011_1101_0000_010: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetTpidrEl0)); break;
+                case 0b11_011_1101_0000_010: EmitSetTpidrEl0(context); return;
 
                 default: throw new NotImplementedException($"Unknown MSR 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
             }
-
-            context.Call(info, GetIntOrZR(context, op.Rt));
         }
 
         public static void Nop(ArmEmitterContext context)
@@ -165,6 +161,28 @@ namespace ARMeilleure.Instructions
             SetIntOrZR(context, op.Rt, fpsr);
         }
 
+        private static void EmitGetTpidrEl0(ArmEmitterContext context)
+        {
+            OpCodeSystem op = (OpCodeSystem)context.CurrOp;
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            Operand result = context.Load(OperandType.I64, context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrEl0Offset())));
+
+            SetIntOrZR(context, op.Rt, result);
+        }
+
+        private static void EmitGetTpidrroEl0(ArmEmitterContext context)
+        {
+            OpCodeSystem op = (OpCodeSystem)context.CurrOp;
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            Operand result = context.Load(OperandType.I64, context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrroEl0Offset())));
+
+            SetIntOrZR(context, op.Rt, result);
+        }
+
         private static void EmitSetNzcv(ArmEmitterContext context)
         {
             OpCodeSystem op = (OpCodeSystem)context.CurrOp;
@@ -215,5 +233,16 @@ namespace ARMeilleure.Instructions
 
             context.UpdateArmFpMode();
         }
+
+        private static void EmitSetTpidrEl0(ArmEmitterContext context)
+        {
+            OpCodeSystem op = (OpCodeSystem)context.CurrOp;
+
+            Operand value = GetIntOrZR(context, op.Rt);
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            context.Store(context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrEl0Offset())), value);
+        }
     }
 }
diff --git a/ARMeilleure/Instructions/InstEmitSystem32.cs b/ARMeilleure/Instructions/InstEmitSystem32.cs
index 2f6cf19d..f2732c99 100644
--- a/ARMeilleure/Instructions/InstEmitSystem32.cs
+++ b/ARMeilleure/Instructions/InstEmitSystem32.cs
@@ -23,8 +23,6 @@ namespace ARMeilleure.Instructions
                 return;
             }
 
-            MethodInfo info;
-
             switch (op.CRn)
             {
                 case 13: // Process and Thread Info.
@@ -36,14 +34,12 @@ namespace ARMeilleure.Instructions
                     switch (op.Opc2)
                     {
                         case 2:
-                            info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetTpidrEl032)); break;
+                            EmitSetTpidrEl0(context); return;
 
                         default:
                             throw new NotImplementedException($"Unknown MRC Opc2 0x{op.Opc2:X} at 0x{op.Address:X} (0x{op.RawOpCode:X}).");
                     }
 
-                    break;
-
                 case 7:
                     switch (op.CRm) // Cache and Memory barrier.
                     {
@@ -64,8 +60,6 @@ namespace ARMeilleure.Instructions
                 default:
                     throw new NotImplementedException($"Unknown MRC 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
             }
-
-            context.Call(info, GetIntA32(context, op.Rt));
         }
 
         public static void Mrc(ArmEmitterContext context)
@@ -79,7 +73,7 @@ namespace ARMeilleure.Instructions
                 return;
             }
 
-            MethodInfo info;
+            Operand result;
 
             switch (op.CRn)
             {
@@ -92,10 +86,10 @@ namespace ARMeilleure.Instructions
                     switch (op.Opc2)
                     {
                         case 2:
-                            info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl032)); break;
+                            result = EmitGetTpidrEl0(context); break;
 
                         case 3:
-                            info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr32)); break;
+                            result = EmitGetTpidrroEl0(context); break;
 
                         default:
                             throw new NotImplementedException($"Unknown MRC Opc2 0x{op.Opc2:X} at 0x{op.Address:X} (0x{op.RawOpCode:X}).");
@@ -110,13 +104,13 @@ namespace ARMeilleure.Instructions
             if (op.Rt == RegisterAlias.Aarch32Pc)
             {
                 // Special behavior: copy NZCV flags into APSR.
-                EmitSetNzcv(context, context.Call(info));
+                EmitSetNzcv(context, result);
 
                 return;
             }
             else
             {
-                SetIntA32(context, op.Rt, context.Call(info));
+                SetIntA32(context, op.Rt, result);
             }
         }
 
@@ -324,5 +318,34 @@ namespace ARMeilleure.Instructions
 
             context.UpdateArmFpMode();
         }
+
+        private static Operand EmitGetTpidrEl0(ArmEmitterContext context)
+        {
+            OpCode32System op = (OpCode32System)context.CurrOp;
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            return context.Load(OperandType.I64, context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrEl0Offset())));
+        }
+
+        private static Operand EmitGetTpidrroEl0(ArmEmitterContext context)
+        {
+            OpCode32System op = (OpCode32System)context.CurrOp;
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            return context.Load(OperandType.I64, context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrroEl0Offset())));
+        }
+
+        private static void EmitSetTpidrEl0(ArmEmitterContext context)
+        {
+            OpCode32System op = (OpCode32System)context.CurrOp;
+
+            Operand value = GetIntA32(context, op.Rt);
+
+            Operand nativeContext = context.LoadArgument(OperandType.I64, 0);
+
+            context.Store(context.Add(nativeContext, Const((ulong)NativeContext.GetTpidrEl0Offset())), context.ZeroExtend32(OperandType.I64, value));
+        }
     }
 }
diff --git a/ARMeilleure/Instructions/NativeInterface.cs b/ARMeilleure/Instructions/NativeInterface.cs
index 57964cc8..2c35387a 100644
--- a/ARMeilleure/Instructions/NativeInterface.cs
+++ b/ARMeilleure/Instructions/NativeInterface.cs
@@ -72,26 +72,6 @@ namespace ARMeilleure.Instructions
             return (ulong)GetContext().DczidEl0;
         }
 
-        public static ulong GetTpidrEl0()
-        {
-            return (ulong)GetContext().TpidrEl0;
-        }
-
-        public static uint GetTpidrEl032()
-        {
-            return (uint)GetContext().TpidrEl0;
-        }
-
-        public static ulong GetTpidrroEl0()
-        {
-            return (ulong)GetContext().TpidrroEl0;
-        }
-
-        public static uint GetTpidr32()
-        {
-            return (uint)GetContext().TpidrroEl0;
-        }
-
         public static ulong GetCntfrqEl0()
         {
             return GetContext().CntfrqEl0;
@@ -106,16 +86,6 @@ namespace ARMeilleure.Instructions
         {
             return GetContext().CntvctEl0;
         }
-
-        public static void SetTpidrEl0(ulong value)
-        {
-            GetContext().TpidrEl0 = (long)value;
-        }
-
-        public static void SetTpidrEl032(uint value)
-        {
-            GetContext().TpidrEl0 = (long)value;
-        }
         #endregion
 
         #region "Read"