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| author | Maximilien Breughe <Maximilien.Breughe@elis.ugent.be> | 2010-05-13 23:45:57 -0400 |
|---|---|---|
| committer | Maximilien Breughe <Maximilien.Breughe@elis.ugent.be> | 2010-05-13 23:45:57 -0400 |
| commit | fc746c2268bfceded0014749cddd8234fa55a35a (patch) | |
| tree | bf84c4e42a67f06185032891532979a9872294a1 | |
| parent | d9845938554c47ab26847d8ea7a5d4f44e4a908b (diff) | |
| download | gem5-fc746c2268bfceded0014749cddd8234fa55a35a.tar.xz | |
BPRED: Fixed the treshold-bug in the tournament predictor.
Suppose the saturating counters of a branch predictor contain n bits. When the
counter is between 0 and (2^(n-1) - 1), boundaries included, the branch is
predicted as not taken. When the counter is between 2^(n-1) and (2^n - 1),
boundaries included, the branch is predicted as taken.
| -rw-r--r-- | src/cpu/pred/tournament.cc | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/src/cpu/pred/tournament.cc b/src/cpu/pred/tournament.cc index 223e45333..96ee87615 100644 --- a/src/cpu/pred/tournament.cc +++ b/src/cpu/pred/tournament.cc @@ -104,7 +104,6 @@ TournamentBP::TournamentBP(unsigned _localPredictorSize, // @todo: Allow for different thresholds between the predictors. threshold = (1 << (localCtrBits - 1)) - 1; - threshold = threshold / 2; } inline |