MemmapFunctions: various MMU optimizations

Small TLB lookup optimizations: this is the hot path for MMU code, so try to
make it better.

Template the TLB lookup functions based on the lookup type (opcode, data,
no exception).

Clean up the Read/Write functions and make them more consistent.

Add an early-exit path for MMU accesses to ReadFromHardware/WriteToHardware.

Source/Core/Core/HW/Memmap.h

@@ -96,12 +96,12 @@ u16 Read_U16(const u32 _Address);
 u32 Read_U32(const u32 _Address);
 u64 Read_U64(const u32 _Address);
 
-u32 Read_S8_Val(u32 address, u32 val);
-u32 Read_U8_Val(u32 address, u32 val);
-u32 Read_S16_Val(u32 address, u32 val);
-u32 Read_U16_Val(u32 address, u32 val);
-u32 Read_U32_Val(u32 address, u32 val);
-u64 Read_U64_Val(u32 address, u64 val);
+u32 Read_S8_Val(const u32 _Address, u32 _var);
+u32 Read_U8_Val(const u32 _Address, u32 _var);
+u32 Read_S16_Val(const u32 _Address, u32 _var);
+u32 Read_U16_Val(const u32 _Address, u32 _var);
+u32 Read_U32_Val(const u32 _Address, u32 _var);
+u64 Read_U64_Val(const u32 _Address, u64 _var);
 
 // Useful helper functions, used by ARM JIT
 float Read_F32(const u32 _Address);
@@ -111,17 +111,17 @@ double Read_F64(const u32 _Address);
 u32 Read_U8_ZX(const u32 _Address);
 u32 Read_U16_ZX(const u32 _Address);
 
-void Write_U8(const u8 _Data, const u32 _Address);
-void Write_U16(const u16 _Data, const u32 _Address);
-void Write_U32(const u32 _Data, const u32 _Address);
-void Write_U64(const u64 _Data, const u32 _Address);
+void Write_U8(const u8 _var, const u32 _Address);
+void Write_U16(const u16 _var, const u32 _Address);
+void Write_U32(const u32 _var, const u32 _Address);
+void Write_U64(const u64 _var, const u32 _Address);
 
-void Write_U16_Swap(const u16 _Data, const u32 _Address);
-void Write_U32_Swap(const u32 _Data, const u32 _Address);
-void Write_U64_Swap(const u64 _Data, const u32 _Address);
+void Write_U16_Swap(const u16 _var, const u32 _Address);
+void Write_U32_Swap(const u32 _var, const u32 _Address);
+void Write_U64_Swap(const u64 _var, const u32 _Address);
 
 // Useful helper functions, used by ARM JIT
-void Write_F64(const double _Data, const u32 _Address);
+void Write_F64(const double _var, const u32 _Address);
 
 std::string GetString(u32 em_address, size_t size = 0);
 
@@ -142,7 +142,7 @@ enum XCheckTLBFlag
 	FLAG_WRITE,
 	FLAG_OPCODE,
 };
-u32 TranslateAddress(u32 _Address, XCheckTLBFlag _Flag);
+template <const XCheckTLBFlag _Flag> u32 TranslateAddress(const u32 _Address);
 void InvalidateTLBEntry(u32 _Address);
 extern u32 pagetable_base;
 extern u32 pagetable_hashmask;