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Diffstat (limited to 'src/cpu/pred/static.cc')
-rw-r--r-- | src/cpu/pred/static.cc | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/cpu/pred/static.cc b/src/cpu/pred/static.cc new file mode 100644 index 000000000..f3844e388 --- /dev/null +++ b/src/cpu/pred/static.cc @@ -0,0 +1,63 @@ +/* + * 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 + */ + +#include "cpu/pred/static.hh" + +StaticBP::StaticBP(const StaticBPParams *params) + : BPredUnit(params), + staticPrediction(params->staticPrediction) +{ + +} + +void +StaticBP::btbUpdate(ThreadID tid, Addr branch_addr, void * &bp_history) +{ +// Place holder for a function that is called to update predictor history when +// a BTB entry is invalid or not found. +} + + +bool +StaticBP::lookup(ThreadID tid, Addr branch_addr, void * &bp_history) +{ + return staticPrediction; +} + +void +StaticBP::uncondBranch(ThreadID tid, Addr pc, void *&bp_history) +{ +} + +StaticBP* +StaticBPParams::create() +{ + return new StaticBP(this); +} |