diff options
author | Nathan Binkert <nate@binkert.org> | 2009-06-04 21:50:20 -0700 |
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committer | Nathan Binkert <nate@binkert.org> | 2009-06-04 21:50:20 -0700 |
commit | 4e3426624557b555c354035ee3961eab7554d81d (patch) | |
tree | 7d5e73630456de787526292b754224e918a4b823 /src/cpu/o3/2bit_local_pred.hh | |
parent | e30c62ad994a730b78361b5ecce45b97e58c0701 (diff) | |
download | gem5-4e3426624557b555c354035ee3961eab7554d81d.tar.xz |
move: put predictor includes and cc files into the same place
--HG--
rename : src/cpu/2bit_local_pred.cc => src/cpu/pred/2bit_local.cc
rename : src/cpu/o3/2bit_local_pred.hh => src/cpu/pred/2bit_local.hh
rename : src/cpu/btb.cc => src/cpu/pred/btb.cc
rename : src/cpu/o3/btb.hh => src/cpu/pred/btb.hh
rename : src/cpu/ras.cc => src/cpu/pred/ras.cc
rename : src/cpu/o3/ras.hh => src/cpu/pred/ras.hh
rename : src/cpu/tournament_pred.cc => src/cpu/pred/tournament.cc
rename : src/cpu/o3/tournament_pred.hh => src/cpu/pred/tournament.hh
Diffstat (limited to 'src/cpu/o3/2bit_local_pred.hh')
-rw-r--r-- | src/cpu/o3/2bit_local_pred.hh | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/src/cpu/o3/2bit_local_pred.hh b/src/cpu/o3/2bit_local_pred.hh deleted file mode 100644 index 8b7bb8463..000000000 --- a/src/cpu/o3/2bit_local_pred.hh +++ /dev/null @@ -1,110 +0,0 @@ -/* - * Copyright (c) 2004-2006 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * Authors: Kevin Lim - */ - -#ifndef __CPU_O3_2BIT_LOCAL_PRED_HH__ -#define __CPU_O3_2BIT_LOCAL_PRED_HH__ - -#include <vector> - -#include "base/types.hh" -#include "cpu/o3/sat_counter.hh" - -/** - * Implements a local predictor that uses the PC to index into a table of - * counters. Note that any time a pointer to the bp_history is given, it - * should be NULL using this predictor because it does not have any branch - * predictor state that needs to be recorded or updated; the update can be - * determined solely by the branch being taken or not taken. - */ -class LocalBP -{ - public: - /** - * Default branch predictor constructor. - * @param localPredictorSize Size of the local predictor. - * @param localCtrBits Number of bits per counter. - * @param instShiftAmt Offset amount for instructions to ignore alignment. - */ - LocalBP(unsigned localPredictorSize, unsigned localCtrBits, - unsigned instShiftAmt); - - /** - * Looks up the given address in the branch predictor and returns - * a true/false value as to whether it is taken. - * @param branch_addr The address of the branch to look up. - * @param bp_history Pointer to any bp history state. - * @return Whether or not the branch is taken. - */ - bool lookup(Addr &branch_addr, void * &bp_history); - - /** - * Updates the branch predictor with the actual result of a branch. - * @param branch_addr The address of the branch to update. - * @param taken Whether or not the branch was taken. - */ - void update(Addr &branch_addr, bool taken, void *bp_history); - - void squash(void *bp_history) - { assert(bp_history == NULL); } - - void reset(); - - private: - /** - * Returns the taken/not taken prediction given the value of the - * counter. - * @param count The value of the counter. - * @return The prediction based on the counter value. - */ - inline bool getPrediction(uint8_t &count); - - /** Calculates the local index based on the PC. */ - inline unsigned getLocalIndex(Addr &PC); - - /** Array of counters that make up the local predictor. */ - std::vector<SatCounter> localCtrs; - - /** Size of the local predictor. */ - unsigned localPredictorSize; - - /** Number of sets. */ - unsigned localPredictorSets; - - /** Number of bits of the local predictor's counters. */ - unsigned localCtrBits; - - /** Number of bits to shift the PC when calculating index. */ - unsigned instShiftAmt; - - /** Mask to get index bits. */ - unsigned indexMask; -}; - -#endif // __CPU_O3_2BIT_LOCAL_PRED_HH__ |