gistfile1.diff

//         u8 xer_so_ov; // format: (SO << 1) | OV

diff --git a/Source/Core/Core/PowerPC/PowerPC.h b/Source/Core/Core/PowerPC/PowerPC.h
index 69eb0da..071582d 100644
--- a/Source/Core/Core/PowerPC/PowerPC.h
+++ b/Source/Core/Core/PowerPC/PowerPC.h
@@ -306,6 +306,20 @@ inline int GetXER_SO()
 
 inline void SetXER_SO(int value)
 {
+	PowerPC::ppcState.xer_so_ov &= ~2;
 	PowerPC::ppcState.xer_so_ov |= value << 1;
+}
+
+inline int GetOverflow()
+{
+	return PowerPC::ppcState.xer_so_ov & 1;
+}
+
+inline int GetSummaryOverflow()
+{
+       return (PowerPC::ppcState.xer_so_ov & 2) >> 1;
+}
+
+/**
+ * Update the OV and SO bits with the result of an operation.
+ *
+ * OV is set to the parameter, and SO is turned on if the parameter is 1.
+ */
+inline void SetOverflow(int value)
+{
+	PowerPC::ppcState.xer_so_ov &= 2; // keep SO
+	// set OV and SO
+	PowerPC::ppcState.xer_so_ov |= (value | (value << 1));
 }