[applied mips sim patch] get closer to coproc usability checking

[cgd@broadcom.com]

One step closer to coprocessor usability testing, and proper
unusable-coprocessor reporting.


cgd
===================================================================
2002-03-05  Chris Demetriou  <cgd@broadcom.com>

	* mips.igen (check_fpu): Enable check for coprocessor 1 usability.
	* sim-main.h (COP_Usable): Define, but for now coprocessor 1
	is always enabled.
	(SignalExceptionCoProcessorUnusable): Take as argument the
	unusable coprocessor number.

Index: mips.igen
===================================================================
RCS file: /cvs/src/src/sim/mips/mips.igen,v
retrieving revision 1.33
diff -u -r1.33 mips.igen
--- mips.igen	2002/03/05 22:24:24	1.33
+++ mips.igen	2002/03/06 05:40:27
@@ -3087,10 +3087,8 @@
 *vr5000:
 *r3900:
 {
-#if 0	/* XXX FIXME: For now, never treat the FPU as disabled.  */
   if (! COP_Usable (1))
     SignalExceptionCoProcessorUnusable (1);
-#endif
 }
 
 
Index: sim-main.h
===================================================================
RCS file: /cvs/src/src/sim/mips/sim-main.h,v
retrieving revision 1.8
diff -u -r1.8 sim-main.h
--- sim-main.h	2002/03/05 19:22:13	1.8
+++ sim-main.h	2002/03/06 05:40:27
@@ -653,7 +653,7 @@
 #define SignalExceptionSimulatorFault(buf)   signal_exception (SD, CPU, cia, SimulatorFault, buf)
 #define SignalExceptionFPE()                 signal_exception (SD, CPU, cia, FPE)
 #define SignalExceptionIntegerOverflow()     signal_exception (SD, CPU, cia, IntegerOverflow)
-#define SignalExceptionCoProcessorUnusable() signal_exception (SD, CPU, cia, CoProcessorUnusable)
+#define SignalExceptionCoProcessorUnusable(cop) signal_exception (SD, CPU, cia, CoProcessorUnusable)
 #define SignalExceptionNMIReset()            signal_exception (SD, CPU, cia, NMIReset)
 #define SignalExceptionTLBRefillStore()      signal_exception (SD, CPU, cia, TLBStore, TLB_REFILL)
 #define SignalExceptionTLBRefillLoad()       signal_exception (SD, CPU, cia, TLBLoad, TLB_REFILL)
@@ -662,6 +662,9 @@
 #define SignalExceptionTLBModification()     signal_exception (SD, CPU, cia, TLBModification)
 
 /* Co-processor accesses */
+
+/* XXX FIXME: For now, assume that FPU (cp1) is always usable.  */
+#define COP_Usable(coproc_num)		(coproc_num == 1)
 
 void cop_lw  PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, unsigned int memword));
 void cop_ld  PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, uword64 memword));