diff options
Diffstat (limited to 'src/cpu/pred/ltage.hh')
| -rw-r--r-- | src/cpu/pred/ltage.hh | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/cpu/pred/ltage.hh b/src/cpu/pred/ltage.hh index d614026d2..e9e34b75d 100644 --- a/src/cpu/pred/ltage.hh +++ b/src/cpu/pred/ltage.hh @@ -67,6 +67,8 @@ class LTAGE: public TAGE // Base class methods. void squash(ThreadID tid, void *bp_history) override; + void regStats() override; + private: // Prediction Structures // Loop Predictor Entry @@ -84,6 +86,11 @@ class LTAGE: public TAGE confidence(0), tag(0), age(0), dir(0) { } }; + // more provider types + enum { + LOOP = LAST_TAGE_PROVIDER_TYPE + 1 + }; + // Primary branch history entry struct LTageBranchInfo : public TageBranchInfo { @@ -177,6 +184,14 @@ class LTAGE: public TAGE void squash( ThreadID tid, bool taken, void *bp_history) override; + /** + * Update the stats + * @param taken Actual branch outcome + * @param bi Pointer to information on the prediction + * recorded at prediction time. + */ + void updateStats(bool taken, TageBranchInfo* bi) override; + const unsigned logSizeLoopPred; const unsigned loopTableAgeBits; const unsigned loopTableConfidenceBits; @@ -191,6 +206,10 @@ class LTAGE: public TAGE int8_t loopUseCounter; unsigned withLoopBits; + + // stats + Stats::Scalar loopPredictorCorrect; + Stats::Scalar loopPredictorWrong; }; #endif // __CPU_PRED_LTAGE |