On Sat, 2002-06-15 at 14:49, Justin Carlson wrote: > I'm obviously missing something basic here. > > Looking at stackframe.h, I see this code as a part of RESTORE_SOME > > > mfc0 t0, CP0_STATUS; \ > .set pop; \ > ori t0, 0x1f; \ > xori t0, 0x1f; \ > mtc0 t0, CP0_STATUS; > OK, this was a stupid question; the answer was staring me in the face (the restoration of the status register from the stack), and I didn't see it. However, I still don't see the point of the above code. Why do we explicitly clear bits 4-0 of the status register just before reloading it from the system stack? -Justin
