diff options
Diffstat (limited to 'src/cpu/pred/BranchPredictor.py')
| -rw-r--r-- | src/cpu/pred/BranchPredictor.py | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/cpu/pred/BranchPredictor.py b/src/cpu/pred/BranchPredictor.py index aa6cd4a25..9d83abb0b 100644 --- a/src/cpu/pred/BranchPredictor.py +++ b/src/cpu/pred/BranchPredictor.py @@ -92,11 +92,9 @@ class LTAGE(BranchPredictor): cxx_class = 'LTAGE' cxx_header = "cpu/pred/ltage.hh" - logSizeBiMP = Param.Unsigned(14, "Log size of Bimodal predictor in bits") logRatioBiModalHystEntries = Param.Unsigned(2, "Log num of prediction entries for a shared hysteresis bit " \ "for the Bimodal") - logSizeTagTables = Param.Unsigned(11, "Log size of tag table in LTAGE") logSizeLoopPred = Param.Unsigned(8, "Log size of the loop predictor") nHistoryTables = Param.Unsigned(12, "Number of history tables") tagTableCounterBits = Param.Unsigned(3, "Number of tag table counter bits") @@ -105,11 +103,22 @@ class LTAGE(BranchPredictor): "A large number to track all branch histories(2MEntries default)") minHist = Param.Unsigned(4, "Minimum history size of LTAGE") maxHist = Param.Unsigned(640, "Maximum history size of LTAGE") - minTagWidth = Param.Unsigned(7, "Minimum tag size in tag tables") + pathHistBits = Param.Unsigned(16, "Path history size") + tagTableTagWidths = VectorParam.Unsigned( + [0, 7, 7, 8, 8, 9, 10, 11, 12, 12, 13, 14, 15], + "Tag size in TAGE tag tables") + logTagTableSizes = VectorParam.Int( + [14, 10, 10, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9], + "Log2 of TAGE table sizes") + logUResetPeriod = Param.Unsigned(19, + "Log period in number of branches to reset TAGE useful counters") + useAltOnNaBits = Param.Unsigned(4, "Size of the USE_ALT_ON_NA counter") + withLoopBits = Param.Unsigned(7, "Size of the WITHLOOP counter") loopTableAgeBits = Param.Unsigned(8, "Number of age bits per loop entry") loopTableConfidenceBits = Param.Unsigned(2, "Number of confidence bits per loop entry") loopTableTagBits = Param.Unsigned(14, "Number of tag bits per loop entry") loopTableIterBits = Param.Unsigned(14, "Nuber of iteration bits per loop") + logLoopTableAssoc = Param.Unsigned(2, "Log loop predictor associativity") |