Update CPStatus before processing the FIFO events and force an exception check on interrupts.

Added more information into the FIFO unknown opcode error message.

Source/Core/VideoCommon/CommandProcessor.cpp

@@ -304,6 +304,9 @@ void RegisterMMIO(MMIO::Mapping* mmio, u32 base)
 
 void GatherPipeBursted()
 {
+	if (IsOnThread())
+		SetCPStatusFromCPU();
+
 	ProcessFifoEvents();
 	// if we aren't linked, we don't care about gather pipe data
 	if (!m_CPCtrlReg.GPLinkEnable)
@@ -326,9 +329,6 @@ void GatherPipeBursted()
 		return;
 	}
 
-	if (IsOnThread())
-		SetCPStatusFromCPU();
-
 	// update the fifo pointer
 	if (fifo.CPWritePointer >= fifo.CPEnd)
 		fifo.CPWritePointer = fifo.CPBase;
@@ -369,6 +369,7 @@ void UpdateInterrupts(u64 userdata)
 		INFO_LOG(COMMANDPROCESSOR,"Interrupt cleared");
 		ProcessorInterface::SetInterrupt(INT_CAUSE_CP, false);
 	}
+	CoreTiming::ForceExceptionCheck(0);
 	interruptWaiting = false;
 }
 
@@ -404,6 +405,7 @@ void SetCPStatusFromGPU()
 			INFO_LOG(COMMANDPROCESSOR, "Cleared breakpoint at %i", fifo.CPReadPointer);
 		fifo.bFF_Breakpoint = false;
 	}
+
 	// overflow & underflow check
 	fifo.bFF_HiWatermark = (fifo.CPReadWriteDistance > fifo.CPHiWatermark);
 	fifo.bFF_LoWatermark = (fifo.CPReadWriteDistance < fifo.CPLoWatermark);
@@ -447,7 +449,7 @@ void SetCPStatusFromCPU()
 
 	if (interrupt != interruptSet && !interruptWaiting)
 	{
-		u64 userdata = interrupt?1:0;
+		u64 userdata = interrupt ? 1 : 0;
 		if (IsOnThread())
 		{
 			if (!interrupt || bpInt || undfInt || ovfInt)

Source/Core/VideoCommon/OpcodeDecoding.cpp

@@ -118,10 +118,19 @@ static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
 		    "bFF_BPEnable: %s\n"
 		    "bFF_BPInt: %s\n"
 		    "bFF_Breakpoint: %s\n"
+		    "bFF_GPLinkEnable: %s\n"
+		    "bFF_HiWatermarkInt: %s\n"
+		    "bFF_LoWatermarkInt: %s\n"
 		    ,cmd_byte, fifo.CPBase, fifo.CPEnd, fifo.CPHiWatermark, fifo.CPLoWatermark, fifo.CPReadWriteDistance
-		    ,fifo.CPWritePointer, fifo.CPReadPointer, fifo.CPBreakpoint, fifo.bFF_GPReadEnable ? "true" : "false"
-		    ,fifo.bFF_BPEnable ? "true" : "false" ,fifo.bFF_BPInt ? "true" : "false"
-		    ,fifo.bFF_Breakpoint ? "true" : "false");
+		    ,fifo.CPWritePointer, fifo.CPReadPointer, fifo.CPBreakpoint
+		    ,fifo.bFF_GPReadEnable ? "true" : "false"
+		    ,fifo.bFF_BPEnable ? "true" : "false"
+		    ,fifo.bFF_BPInt ? "true" : "false"
+		    ,fifo.bFF_Breakpoint ? "true" : "false"
+		    ,fifo.bFF_GPLinkEnable ? "true" : "false"
+		    ,fifo.bFF_HiWatermarkInt ? "true" : "false"
+		    ,fifo.bFF_LoWatermarkInt ? "true" : "false"
+		    );
 	}
 }