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Various branch predictor fixes/cleanup. It works more correctly now and supports both local and tournament predictors.

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cpu/o3/2bit_local_pred.cc:
    Branch predictor cleanup/fixup.  Rename this to LocalBP.
cpu/o3/2bit_local_pred.hh:
    Rename to LocalBP, update to support changes to BPredUnit, include comments.
cpu/o3/alpha_cpu_builder.cc:
    Support extra parameters to the branch predictor.  Now it takes in a parameter to tell it which branch predictor it is using, the local or the tournament predictor.
cpu/o3/alpha_params.hh:
    Add in extra parameter for the branch predictor type.
cpu/o3/bpred_unit.cc:
    Branch predictor fixup/cleanup.  Rename it to BPredUnit.
cpu/o3/bpred_unit.hh:
    Branch predictor fixup/cleanup.  Now supports both the local and tournament predictors, and stores the branch predictor update state.
cpu/o3/bpred_unit_impl.hh:
    Branch predictor overhaul.  Now supports both the local and tournament predictors.
cpu/o3/cpu_policy.hh:
cpu/ozone/ozone_impl.hh:
cpu/ozone/simple_impl.hh:
    Reflect the class name change.
cpu/o3/decode_impl.hh:
    Be sure to set the predicted target as well so we don't squash twice.
cpu/o3/tournament_pred.cc:
cpu/o3/tournament_pred.hh:
    Fixes to the tournament predictor.
cpu/ozone/simple_params.hh:
    Include parameter for the branch predictor type.
python/m5/objects/AlphaFullCPU.py:
python/m5/objects/OzoneCPU.py:
    Include the parameter for the branch predictor type.

--HG--
extra : convert_revision : 34afebb3b40b47accb12558e439ee4cb03df5e64
This commit is contained in:
Kevin Lim
2006-05-25 17:01:48 -04:00
parent 02aa549c9b
commit 248bd2bb62
16 changed files with 461 additions and 195 deletions
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1
python/m5/objects/AlphaFullCPU.py
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@@ -55,6 +55,7 @@ class DerivAlphaFullCPU(BaseCPU):
trapLatency = Param.Tick("Trap latency")
fetchTrapLatency = Param.Tick("Fetch trap latency")
predType = Param.String("Branch predictor type ('local', 'tournament')")
localPredictorSize = Param.Unsigned("Size of local predictor")
localCtrBits = Param.Unsigned("Bits per counter")
localHistoryTableSize = Param.Unsigned("Size of local history table")

1
python/m5/objects/OzoneCPU.py
View File

@@ -57,6 +57,7 @@ class DerivOzoneCPU(BaseCPU):
commitWidth = Param.Unsigned("Commit width")
squashWidth = Param.Unsigned("Squash width")
predType = Param.String("Type of branch predictor ('local', 'tournament')")
localPredictorSize = Param.Unsigned("Size of local predictor")
localCtrBits = Param.Unsigned("Bits per counter")
localHistoryTableSize = Param.Unsigned("Size of local history table")