diff options
Diffstat (limited to 'src/cpu/pred/bpred_unit.hh')
| -rw-r--r-- | src/cpu/pred/bpred_unit.hh | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/src/cpu/pred/bpred_unit.hh b/src/cpu/pred/bpred_unit.hh index bef8cb949..fb10a8bee 100644 --- a/src/cpu/pred/bpred_unit.hh +++ b/src/cpu/pred/bpred_unit.hh @@ -52,6 +52,7 @@ #include "base/statistics.hh" #include "base/types.hh" #include "cpu/pred/btb.hh" +#include "cpu/pred/indirect.hh" #include "cpu/pred/ras.hh" #include "cpu/inst_seq.hh" #include "cpu/static_inst.hh" @@ -197,6 +198,9 @@ class BPredUnit : public SimObject void BTBUpdate(Addr instPC, const TheISA::PCState &target) { BTB.update(instPC, target, 0); } + + virtual unsigned getGHR(void* bp_history) const { return 0; } + void dump(); private: @@ -210,7 +214,7 @@ class BPredUnit : public SimObject ThreadID _tid) : seqNum(seq_num), pc(instPC), bpHistory(bp_history), RASTarget(0), RASIndex(0), tid(_tid), predTaken(pred_taken), usedRAS(0), pushedRAS(0), - wasCall(0), wasReturn(0), wasSquashed(0) + wasCall(0), wasReturn(0), wasSquashed(0), wasIndirect(0) {} bool operator==(const PredictorHistory &entry) const { @@ -255,6 +259,9 @@ class BPredUnit : public SimObject /** Whether this instruction has already mispredicted/updated bp */ bool wasSquashed; + + /** Wether this instruction was an indirect branch */ + bool wasIndirect; }; typedef std::deque<PredictorHistory> History; @@ -276,6 +283,12 @@ class BPredUnit : public SimObject /** The per-thread return address stack. */ std::vector<ReturnAddrStack> RAS; + /** Option to disable indirect predictor. */ + const bool useIndirect; + + /** The indirect target predictor. */ + IndirectPredictor iPred; + /** Stat for number of BP lookups. */ Stats::Scalar lookups; /** Stat for number of conditional branches predicted. */ @@ -295,6 +308,15 @@ class BPredUnit : public SimObject /** Stat for number of times the RAS is incorrect. */ Stats::Scalar RASIncorrect; + /** Stat for the number of indirect target lookups.*/ + Stats::Scalar indirectLookups; + /** Stat for the number of indirect target hits.*/ + Stats::Scalar indirectHits; + /** Stat for the number of indirect target misses.*/ + Stats::Scalar indirectMisses; + /** Stat for the number of indirect target mispredictions.*/ + Stats::Scalar indirectMispredicted; + protected: /** Number of bits to shift instructions by for predictor addresses. */ const unsigned instShiftAmt; |