ARM/O3: store the result of the predicate evaluation in DynInst or Threadstate.

THis allows the CPU to handle predicated-false instructions accordingly.
This particular patch makes loads that are predicated-false to be sent
straight to the commit stage directly, not waiting for return of the data
that was never requested since it was predicated-false.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/cpu/simple_thread.hh b/src/cpu/simple_thread.hh
index bc8588041..dcd933ffc 100644
--- a/src/cpu/simple_thread.hh
+++ b/src/cpu/simple_thread.hh
@@ -128,6 +128,9 @@ class SimpleThread : public ThreadState
      */
     Addr nextNPC;
 
+    /** Did this instruction execute or is it predicated false */
+    bool predicate;
+
   public:
     // pointer to CPU associated with this SimpleThread
     BaseCPU *cpu;
@@ -371,6 +374,16 @@ class SimpleThread : public ThreadState
 #endif
     }
 
+    bool readPredicate()
+    {
+        return predicate;
+    }
+
+    void setPredicate(bool val)
+    {
+        predicate = val;
+    }
+
     MiscReg
     readMiscRegNoEffect(int misc_reg, ThreadID tid = 0)
     {