diff -r cbd95ce8ce6a -r 0872f196797d src/cpu/base_dyn_inst.hh
--- a/src/cpu/base_dyn_inst.hh	Tue Feb 10 17:51:03 2015 +0000
+++ b/src/cpu/base_dyn_inst.hh	Thu Dec 11 15:33:00 2014 +0000
@@ -594,6 +594,7 @@
     // for machines with separate int & FP reg files
     int8_t numFPDestRegs()  const { return staticInst->numFPDestRegs(); }
     int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); }
+    int8_t numCCDestRegs() const { return staticInst->numCCDestRegs(); }
 
     /** Returns the logical register index of the i'th destination register. */
     RegIndex destRegIdx(int i) const { return staticInst->destRegIdx(i); }
diff -r cbd95ce8ce6a -r 0872f196797d src/cpu/o3/rename_impl.hh
--- a/src/cpu/o3/rename_impl.hh	Tue Feb 10 17:51:03 2015 +0000
+++ b/src/cpu/o3/rename_impl.hh	Thu Dec 11 15:33:00 2014 +0000
@@ -633,7 +633,9 @@
 
         // Check here to make sure there are enough destination registers
         // to rename to.  Otherwise block.
-        if (renameMap[tid]->numFreeEntries() < inst->numDestRegs()) {
+        if (!renameMap[tid]->canRename(inst->numIntDestRegs(),
+                                       inst->numFPDestRegs(),
+                                       inst->numCCDestRegs())) {
             DPRINTF(Rename, "Blocking due to lack of free "
                     "physical registers to rename to.\n");
             blockThisCycle = true;
diff -r cbd95ce8ce6a -r 0872f196797d src/cpu/o3/rename_map.hh
--- a/src/cpu/o3/rename_map.hh	Tue Feb 10 17:51:03 2015 +0000
+++ b/src/cpu/o3/rename_map.hh	Thu Dec 11 15:33:00 2014 +0000
@@ -346,6 +346,16 @@
     {
         return std::min(intMap.numFreeEntries(), floatMap.numFreeEntries());
     }
+    /**
+     * Return whether there are enough registers to serve the request.
+     */
+    bool canRename(uint32_t intRegs, uint32_t floatRegs, uint32_t ccRegs) const
+    {
+        return intRegs <= intMap.numFreeEntries() &&
+            floatRegs <= floatMap.numFreeEntries() &&
+            ccRegs <= ccMap.numFreeEntries();
+    }
+
 };
 
 #endif //__CPU_O3_RENAME_MAP_HH__
diff -r cbd95ce8ce6a -r 0872f196797d src/cpu/static_inst.hh
--- a/src/cpu/static_inst.hh	Tue Feb 10 17:51:03 2015 +0000
+++ b/src/cpu/static_inst.hh	Thu Dec 11 15:33:00 2014 +0000
@@ -117,6 +117,9 @@
     /// Number of integer destination regs.
     int8_t numIntDestRegs() const { return _numIntDestRegs; }
     //@}
+    /// Number of coprocesor destination regs.
+    int8_t numCCDestRegs() const { return _numCCDestRegs; }
+    //@}
 
     /// @name Flag accessors.
     /// These functions are used to access the values of the various