diff options
Diffstat (limited to 'src/cpu/o3/bpred_unit.hh')
| -rw-r--r-- | src/cpu/o3/bpred_unit.hh | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/cpu/o3/bpred_unit.hh b/src/cpu/o3/bpred_unit.hh index 8dbba9085..d3ae93b38 100644 --- a/src/cpu/o3/bpred_unit.hh +++ b/src/cpu/o3/bpred_unit.hh @@ -137,6 +137,16 @@ class BPredUnit */ bool BPLookup(Addr instPC, void * &bp_history); + /** + * If a branch is not taken, because the BTB address is invalid or missing, + * this function sets the appropriate counter in the global and local + * predictors to not taken. + * @param inst_PC The PC to look up the local predictor. + * @param bp_history Pointer that will be set to an object that + * has the branch predictor state associated with the lookup. + */ + void BPBTBUpdate(Addr instPC, void * &bp_history); + /** * Looks up a given PC in the BTB to see if a matching entry exists. * @param inst_PC The PC to look up. @@ -159,9 +169,11 @@ class BPredUnit * @param taken Whether the branch was taken or not taken. * @param bp_history Pointer to the branch predictor state that is * associated with the branch lookup that is being updated. + * @param squashed Set to true when this function is called during a + * squash operation. * @todo Make this update flexible enough to handle a global predictor. */ - void BPUpdate(Addr instPC, bool taken, void *bp_history); + void BPUpdate(Addr instPC, bool taken, void *bp_history, bool squashed); /** * Updates the BTB with the target of a branch. |