CheckerCPU: Add function stubs to non-ARM ISA source to compile with CheckerCPU

Making the CheckerCPU a runtime time option requires the code to be compatible
with ISAs other than ARM.  This patch adds the appropriate function
stubs to allow compilation.

src/cpu/checker/cpu.hh

@@ -311,6 +311,20 @@ class CheckerCPU : public BaseCPU
         int reg_idx = si->destRegIdx(idx) - TheISA::Ctrl_Base_DepTag;
         return thread->setMiscReg(reg_idx, val);
     }
+
+#if THE_ISA == MIPS_ISA
+    uint64_t readRegOtherThread(int misc_reg)
+    {
+        panic("MIPS MT not defined for CheckerCPU.\n");
+        return 0;
+    }
+
+    void setRegOtherThread(int misc_reg, const TheISA::MiscReg &val)
+    {
+        panic("MIPS MT not defined for CheckerCPU.\n");
+    }
+#endif
+
     /////////////////////////////////////////
 
     void recordPCChange(const TheISA::PCState &val)

src/cpu/checker/cpu_impl.hh

@@ -44,6 +44,7 @@
 #include <list>
 #include <string>
 
+#include "arch/isa_traits.hh"
 #include "arch/vtophys.hh"
 #include "base/refcnt.hh"
 #include "config/the_isa.hh"
@@ -201,9 +202,9 @@ Checker<Impl>::verify(DynInstPtr &completed_inst)
 
         // maintain $r0 semantics
         thread->setIntReg(ZeroReg, 0);
-#ifdef TARGET_ALPHA
-        thread->setFloatRegDouble(ZeroReg, 0.0);
-#endif // TARGET_ALPHA
+#if THE_ISA == ALPHA_ISA
+        thread->setFloatReg(ZeroReg, 0.0);
+#endif
 
         // Check if any recent PC changes match up with anything we
         // expect to happen.  This is mostly to check if traps or
@@ -320,7 +321,9 @@ Checker<Impl>::verify(DynInstPtr &completed_inst)
                         thread->pcState(pcState);
                         instPtr = thread->decoder.decode(newMachInst,
                                                          pcState.instAddr());
-                        machInst = newMachInst;
+#if THE_ISA != X86_ISA
+                            machInst = newMachInst;
+#endif
                     } else {
                         fetchDone = false;
                         fetchOffset += sizeof(TheISA::MachInst);
@@ -476,7 +479,11 @@ Checker<Impl>::validateInst(DynInstPtr &inst)
         }
     }
 
-    MachInst mi = static_cast<MachInst>(inst->staticInst->machInst);
+
+    MachInst mi;
+#if THE_ISA != X86_ISA
+    mi = static_cast<MachInst>(inst->staticInst->machInst);
+#endif
 
     if (mi != machInst) {
         panic("%lli: Binary instructions do not match! Inst: %#x, "

src/cpu/inorder/thread_context.hh

@@ -40,6 +40,7 @@
 #include "arch/kernel_stats.hh"
 
 class EndQuiesceEvent;
+class CheckerCPU;
 namespace Kernel {
     class Statistics;
 };
@@ -76,6 +77,12 @@ class InOrderThreadContext : public ThreadContext
     /** @TODO: PERF: Should we bind this to a pointer in constructor? */
     TheISA::TLB *getDTBPtr() { return cpu->getDTBPtr(); }
 
+    /** Currently InOrder model does not support CheckerCPU, this is
+     *  merely here for supporting compilation of gem5 with the Checker
+     *  as a runtime option
+     */
+    CheckerCPU *getCheckerCpuPtr() { return NULL; }
+
     Decoder *getDecoderPtr() { return cpu->getDecoderPtr(); }
 
     System *getSystemPtr() { return cpu->system; }
@@ -215,6 +222,12 @@ class InOrderThreadContext : public ThreadContext
     void pcState(const TheISA::PCState &val)
     { cpu->pcState(val, thread->threadId()); }
 
+    /** Needs to be implemented for future CheckerCPU support.
+     *  See O3CPU for examples on how to integrate Checker.
+     */
+    void pcStateNoRecord(const TheISA::PCState &val)
+    {}
+
     Addr instAddr()
     { return cpu->instAddr(thread->threadId()); }