JIT: make memcheck macro support an inverted mode

Source/Core/Core/PowerPC/Jit64/Jit_LoadStore.cpp

@@ -238,7 +238,7 @@ void Jit64::lXXx(UGeckoInstruction inst)
 	if (update && storeAddress)
 	{
 		gpr.BindToRegister(a, true, true);
-		MEMCHECK_START
+		MEMCHECK_START(false)
 		MOV(32, gpr.R(a), opAddress);
 		MEMCHECK_END
 	}
@@ -413,7 +413,7 @@ void Jit64::stX(UGeckoInstruction inst)
 
 		if (update && offset)
 		{
-			MEMCHECK_START
+			MEMCHECK_START(false)
 			gpr.KillImmediate(a, true, true);
 
 			ADD(32, gpr.R(a), Imm32((u32)offset));

Source/Core/Core/PowerPC/Jit64/Jit_LoadStoreFloating.cpp

@@ -65,7 +65,7 @@ void Jit64::lfXXX(UGeckoInstruction inst)
 	fpr.Lock(d);
 	fpr.BindToRegister(d, js.memcheck || !single);
 
-	MEMCHECK_START
+	MEMCHECK_START(false)
 	if (single)
 	{
 		ConvertSingleToDouble(fpr.RX(d), RSCRATCH, true);

Source/Core/Core/PowerPC/Jit64/Jit_LoadStorePaired.cpp

@@ -63,7 +63,7 @@ void Jit64::psq_st(UGeckoInstruction inst)
 
 	if (update && offset && js.memcheck)
 	{
-		MEMCHECK_START
+		MEMCHECK_START(false)
 		ADD(32, gpr.R(a), Imm32((u32)offset));
 		MEMCHECK_END
 	}
@@ -100,7 +100,7 @@ void Jit64::psq_l(UGeckoInstruction inst)
 
 	CALLptr(MScaled(RSCRATCH, SCALE_8, (u32)(u64)asm_routines.pairedLoadQuantized));
 
-	MEMCHECK_START
+	MEMCHECK_START(false)
 	CVTPS2PD(fpr.RX(s), R(XMM0));
 	if (update && offset && js.memcheck)
 	{

Source/Core/Core/PowerPC/JitCommon/Jit_Util.cpp

@@ -318,8 +318,7 @@ void EmuCodeBlock::SafeLoadToReg(X64Reg reg_value, const Gen::OpArg & opAddress,
 				}
 				ABI_PopRegistersAndAdjustStack(registersInUse, 0);
 
-				MEMCHECK_START
-
+				MEMCHECK_START(false)
 				if (signExtend && accessSize < 32)
 				{
 					// Need to sign extend values coming from the Read_U* functions.
@@ -329,7 +328,6 @@ void EmuCodeBlock::SafeLoadToReg(X64Reg reg_value, const Gen::OpArg & opAddress,
 				{
 					MOVZX(64, accessSize, reg_value, R(ABI_RETURN));
 				}
-
 				MEMCHECK_END
 			}
 		}
@@ -379,8 +377,7 @@ void EmuCodeBlock::SafeLoadToReg(X64Reg reg_value, const Gen::OpArg & opAddress,
 			}
 			ABI_PopRegistersAndAdjustStack(registersInUse, rsp_alignment);
 
-			MEMCHECK_START
-
+			MEMCHECK_START(false)
 			if (signExtend && accessSize < 32)
 			{
 				// Need to sign extend values coming from the Read_U* functions.
@@ -390,8 +387,8 @@ void EmuCodeBlock::SafeLoadToReg(X64Reg reg_value, const Gen::OpArg & opAddress,
 			{
 				MOVZX(64, accessSize, reg_value, R(ABI_RETURN));
 			}
-
 			MEMCHECK_END
+
 			if (farcode.Enabled())
 			{
 				exit = J(true);

Source/Core/Core/PowerPC/JitCommon/Jit_Util.h

@@ -11,11 +11,13 @@
 
 namespace MMIO { class Mapping; }
 
-#define MEMCHECK_START \
+// If inv is true, invert the check (i.e. skip over the associated code if an exception hits,
+// instead of skipping over the code if an exception isn't hit).
+#define MEMCHECK_START(inv) \
 	Gen::FixupBranch memException; \
 	if (jit->js.memcheck) \
 	{ TEST(32, PPCSTATE(Exceptions), Gen::Imm32(EXCEPTION_DSI)); \
-	memException = J_CC(Gen::CC_NZ, true); }
+	memException = J_CC((inv) ? Gen::CC_Z : Gen::CC_NZ, true); }
 
 #define MEMCHECK_END \
 	if (jit->js.memcheck) \