diff --git a/rpcs3/Emu/Cell/PPUThread.h b/rpcs3/Emu/Cell/PPUThread.h
index 9654667526..0a11d9a724 100644
--- a/rpcs3/Emu/Cell/PPUThread.h
+++ b/rpcs3/Emu/Cell/PPUThread.h
@@ -831,93 +831,158 @@ public:
 	ppu_thread& gpr(uint index, u64 value);
 };
 
-template<typename T, size_t size = sizeof(T)>
+template<typename T, bool is_enum = std::is_enum<T>::value>
 struct cast_ppu_gpr
 {
-	static_assert(sizeof(T) <= 8, "Invalid type for cast_ppu_gpr");
+	static_assert(is_enum, "Invalid type for cast_ppu_gpr");
+
+	typedef typename std::underlying_type<T>::type underlying_type;
 
 	__forceinline static u64 to_gpr(const T& value)
 	{
-		u64 result = 0;
-		(T&)result = value;
-		return result;
+		return cast_ppu_gpr<underlying_type>::to_gpr(static_cast<underlying_type>(value));
 	}
-};
 
-template<typename T>
-struct cast_ppu_gpr<T, 1>
-{
-	__forceinline static u64 to_gpr(const T& value)
+	__forceinline static T from_gpr(const u64 reg)
 	{
-		return (u8&)value;
-	}
-};
-
-template<typename T>
-struct cast_ppu_gpr<T, 2>
-{
-	__forceinline static u64 to_gpr(const T& value)
-	{
-		return (u16&)value;
-	}
-};
-
-template<typename T>
-struct cast_ppu_gpr<T, 4>
-{
-	__forceinline static u64 to_gpr(const T& value)
-	{
-		return (u32&)value;
-	}
-};
-
-template<typename T>
-struct cast_ppu_gpr<T, 8>
-{
-	__forceinline static u64 to_gpr(const T& value)
-	{
-		return (u64&)value;
+		return static_cast<T>(cast_ppu_gpr<underlying_type>::from_gpr(reg));
 	}
 };
 
 template<>
-struct cast_ppu_gpr<s8, 1>
+struct cast_ppu_gpr<u8, false>
+{
+	__forceinline static u64 to_gpr(const u8& value)
+	{
+		return value;
+	}
+
+	__forceinline static u8 from_gpr(const u64 reg)
+	{
+		return static_cast<u8>(reg);
+	}
+};
+
+template<>
+struct cast_ppu_gpr<u16, false>
+{
+	__forceinline static u64 to_gpr(const u16& value)
+	{
+		return value;
+	}
+
+	__forceinline static u16 from_gpr(const u64 reg)
+	{
+		return static_cast<u16>(reg);
+	}
+};
+
+template<>
+struct cast_ppu_gpr<u32, false>
+{
+	__forceinline static u64 to_gpr(const u32& value)
+	{
+		return value;
+	}
+
+	__forceinline static u32 from_gpr(const u64 reg)
+	{
+		return static_cast<u32>(reg);
+	}
+};
+
+template<>
+struct cast_ppu_gpr<u64, false>
+{
+	__forceinline static u64 to_gpr(const u64& value)
+	{
+		return value;
+	}
+
+	__forceinline static u64 from_gpr(const u64 reg)
+	{
+		return reg;
+	}
+};
+
+template<>
+struct cast_ppu_gpr<s8, false>
 {
 	__forceinline static u64 to_gpr(const s8& value)
 	{
 		return value;
 	}
+
+	__forceinline static s8 from_gpr(const u64 reg)
+	{
+		return static_cast<s8>(reg);
+	}
 };
 
 template<>
-struct cast_ppu_gpr<s16, 2>
+struct cast_ppu_gpr<s16, false>
 {
 	__forceinline static u64 to_gpr(const s16& value)
 	{
 		return value;
 	}
+
+	__forceinline static s16 from_gpr(const u64 reg)
+	{
+		return static_cast<s16>(reg);
+	}
 };
 
 template<>
-struct cast_ppu_gpr<s32, 4>
+struct cast_ppu_gpr<s32, false>
 {
 	__forceinline static u64 to_gpr(const s32& value)
 	{
 		return value;
 	}
+
+	__forceinline static s32 from_gpr(const u64 reg)
+	{
+		return static_cast<s32>(reg);
+	}
 };
 
 template<>
-struct cast_ppu_gpr<s64, 8>
+struct cast_ppu_gpr<s64, false>
 {
 	__forceinline static u64 to_gpr(const s64& value)
 	{
 		return value;
 	}
+
+	__forceinline static s64 from_gpr(const u64 reg)
+	{
+		return static_cast<s64>(reg);
+	}
+};
+
+template<>
+struct cast_ppu_gpr<bool, false>
+{
+	__forceinline static u64 to_gpr(const bool& value)
+	{
+		return value;
+	}
+
+	__forceinline static bool from_gpr(const u64 reg)
+	{
+		return (bool&)reg;
+	}
 };
 
 template<typename T>
-__forceinline static u64 cast_to_ppu_gpr(const T& value)
+__forceinline u64 cast_to_ppu_gpr(const T& value)
 {
 	return cast_ppu_gpr<T>::to_gpr(value);
 }
+
+template<typename T>
+__forceinline T cast_from_ppu_gpr(const u64 reg)
+{
+	return cast_ppu_gpr<T>::from_gpr(reg);
+}
diff --git a/rpcs3/Emu/Memory/vm_ptr.h b/rpcs3/Emu/Memory/vm_ptr.h
index d0c061c096..297c6da7ef 100644
--- a/rpcs3/Emu/Memory/vm_ptr.h
+++ b/rpcs3/Emu/Memory/vm_ptr.h
@@ -535,3 +535,22 @@ namespace fmt
 		}
 	};
 }
+
+// external specializations for PPU GPR (SC_FUNC.h, CB_FUNC.h)
+
+template<typename T, bool is_enum>
+struct cast_ppu_gpr;
+
+template<typename T, int lvl, typename AT>
+struct cast_ppu_gpr<vm::ps3::ptr<T, lvl, AT>, false>
+{
+	__forceinline static u64 to_gpr(const vm::ps3::ptr<T, lvl, AT>& value)
+	{
+		return value.addr();
+	}
+
+	__forceinline static vm::ps3::ptr<T, lvl, AT> from_gpr(const u64 reg)
+	{
+		return vm::ps3::ptr<T, lvl, AT>::make(cast_ppu_gpr<AT>::from_gpr(reg));
+	}
+};
diff --git a/rpcs3/Emu/Memory/vm_ref.h b/rpcs3/Emu/Memory/vm_ref.h
index 7a21693bf0..79045a4118 100644
--- a/rpcs3/Emu/Memory/vm_ref.h
+++ b/rpcs3/Emu/Memory/vm_ref.h
@@ -147,3 +147,22 @@ namespace fmt
 		}
 	};
 }
+
+// external specializations for PPU GPR (SC_FUNC.h, CB_FUNC.h)
+
+template<typename T, bool is_enum>
+struct cast_ppu_gpr;
+
+template<typename T, typename AT>
+struct cast_ppu_gpr<vm::ps3::ref<T, AT>, false>
+{
+	__forceinline static u64 to_gpr(const vm::ps3::ref<T, AT>& value)
+	{
+		return value.addr();
+	}
+
+	__forceinline static vm::ps3::ref<T, AT> from_gpr(const u64 reg)
+	{
+		return vm::ps3::ref<T, AT>::make(cast_ppu_gpr<AT>::from_gpr(reg));
+	}
+};
diff --git a/rpcs3/Emu/SysCalls/CB_FUNC.h b/rpcs3/Emu/SysCalls/CB_FUNC.h
index e567225185..403a703db5 100644
--- a/rpcs3/Emu/SysCalls/CB_FUNC.h
+++ b/rpcs3/Emu/SysCalls/CB_FUNC.h
@@ -37,7 +37,7 @@ namespace cb_detail
 
 		__forceinline static void set_value(PPUThread& CPU, const T& arg)
 		{
-			CPU.FPR[f_count] = arg;
+			CPU.FPR[f_count] = static_cast<T>(arg);
 		}
 	};
 
@@ -101,7 +101,7 @@ namespace cb_detail
 
 		__forceinline static T get_value(const PPUThread& CPU)
 		{
-			return (T&)CPU.GPR[3];
+			return cast_from_ppu_gpr<T>(CPU.GPR[3]);
 		}
 	};
 
@@ -112,7 +112,7 @@ namespace cb_detail
 
 		__forceinline static T get_value(const PPUThread& CPU)
 		{
-			return (T)CPU.FPR[1];
+			return static_cast<T>(CPU.FPR[1]);
 		}
 	};
 
diff --git a/rpcs3/Emu/SysCalls/SC_FUNC.h b/rpcs3/Emu/SysCalls/SC_FUNC.h
index ad405eac7a..0fd40217ca 100644
--- a/rpcs3/Emu/SysCalls/SC_FUNC.h
+++ b/rpcs3/Emu/SysCalls/SC_FUNC.h
@@ -28,7 +28,7 @@ namespace detail
 
 		static __forceinline T func(PPUThread& CPU)
 		{
-			return (T&)CPU.GPR[g_count + 2];
+			return cast_from_ppu_gpr<T>(CPU.GPR[g_count + 2]);
 		}
 	};
 
@@ -39,7 +39,7 @@ namespace detail
 
 		static __forceinline T func(PPUThread& CPU)
 		{
-			return (T)CPU.FPR[f_count];
+			return static_cast<T>(CPU.FPR[f_count]);
 		}
 	};
 
@@ -65,7 +65,7 @@ namespace detail
 		{
 			// TODO: check stack argument displacement
 			const u64 res = CPU.GetStackArg(8 + std::max(g_count - 8, 0) + std::max(f_count - 13, 0) + std::max(v_count - 12, 0));
-			return (T&)res;
+			return cast_from_ppu_gpr<T>(res);
 		}
 	};
 
@@ -88,7 +88,7 @@ namespace detail
 
 		static __forceinline void func(PPUThread& CPU, const T& result)
 		{
-			CPU.FPR[1] = result;
+			CPU.FPR[1] = static_cast<T>(result);
 		}
 	};