diff options
author | Nilay Vaish ext:(%2C%20Timothy%20Jones%20%3Ctimothy.jones%40cl.cam.ac.uk%3E) <nilay@cs.wisc.edu> | 2013-01-24 12:28:51 -0600 |
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committer | Nilay Vaish ext:(%2C%20Timothy%20Jones%20%3Ctimothy.jones%40cl.cam.ac.uk%3E) <nilay@cs.wisc.edu> | 2013-01-24 12:28:51 -0600 |
commit | dbeabedaf0f8d9ec0ea3331db2e44b1add53f79f (patch) | |
tree | 568d3b6007adf1a8d3ba6568fc5635e56afd3d53 /src/cpu/o3/sat_counter.hh | |
parent | 11d5ffa108983d5d9742f0aad23f80c691f285ee (diff) | |
download | gem5-dbeabedaf0f8d9ec0ea3331db2e44b1add53f79f.tar.xz |
branch predictor: move out of o3 and inorder cpus
This patch moves the branch predictor files in the o3 and inorder directories
to src/cpu/pred. This allows sharing the branch predictor across different
cpu models.
This patch was originally posted by Timothy Jones in July 2010
but never made it to the repository.
--HG--
rename : src/cpu/o3/bpred_unit.cc => src/cpu/pred/bpred_unit.cc
rename : src/cpu/o3/bpred_unit.hh => src/cpu/pred/bpred_unit.hh
rename : src/cpu/o3/bpred_unit_impl.hh => src/cpu/pred/bpred_unit_impl.hh
rename : src/cpu/o3/sat_counter.hh => src/cpu/pred/sat_counter.hh
Diffstat (limited to 'src/cpu/o3/sat_counter.hh')
-rw-r--r-- | src/cpu/o3/sat_counter.hh | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/src/cpu/o3/sat_counter.hh b/src/cpu/o3/sat_counter.hh deleted file mode 100644 index 17ff8546b..000000000 --- a/src/cpu/o3/sat_counter.hh +++ /dev/null @@ -1,117 +0,0 @@ -/* - * Copyright (c) 2005-2006 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_SAT_COUNTER_HH__ -#define __CPU_O3_SAT_COUNTER_HH__ - -#include "base/misc.hh" -#include "base/types.hh" - -/** - * Private counter class for the internal saturating counters. - * Implements an n bit saturating counter and provides methods to - * increment, decrement, and read it. - * @todo Consider making this something that more closely mimics a - * built in class so you can use ++ or --. - */ -class SatCounter -{ - public: - /** - * Constructor for the counter. - */ - SatCounter() - : initialVal(0), counter(0) - { } - - /** - * Constructor for the counter. - * @param bits How many bits the counter will have. - */ - SatCounter(unsigned bits) - : initialVal(0), maxVal((1 << bits) - 1), counter(0) - { } - - /** - * Constructor for the counter. - * @param bits How many bits the counter will have. - * @param initial_val Starting value for each counter. - */ - SatCounter(unsigned bits, uint8_t initial_val) - : initialVal(initial_val), maxVal((1 << bits) - 1), - counter(initial_val) - { - // Check to make sure initial value doesn't exceed the max - // counter value. - if (initial_val > maxVal) { - fatal("BP: Initial counter value exceeds max size."); - } - } - - /** - * Sets the number of bits. - */ - void setBits(unsigned bits) { maxVal = (1 << bits) - 1; } - - void reset() { counter = initialVal; } - - /** - * Increments the counter's current value. - */ - void increment() - { - if (counter < maxVal) { - ++counter; - } - } - - /** - * Decrements the counter's current value. - */ - void decrement() - { - if (counter > 0) { - --counter; - } - } - - /** - * Read the counter's value. - */ - const uint8_t read() const - { return counter; } - - private: - uint8_t initialVal; - uint8_t maxVal; - uint8_t counter; -}; - -#endif // __CPU_O3_SAT_COUNTER_HH__ |