inorder: branch predictor update

only update BTB on a taken branch and update branch predictor w/pcstate from instruction
---
only pay attention to branch predictor updates if the the inst. is in fact a branch

1 files changed, 3 insertions, 0 deletions

diff --git a/src/cpu/inorder/cpu.cc b/src/cpu/inorder/cpu.cc
index 03c44ea86..75e9e06d9 100644
--- a/src/cpu/inorder/cpu.cc
+++ b/src/cpu/inorder/cpu.cc
@@ -506,6 +506,9 @@ InOrderCPU::createBackEndSked(DynInstPtr inst)
         W.needs(RegManager, UseDefUnit::WriteDestReg, idx);
     }
 
+    if (inst->isControl())
+        W.needs(BPred, BranchPredictor::UpdatePredictor);
+
     // Insert Back Schedule into our cache of
     // resource schedules
     addToSkedCache(inst, res_sked);