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author | Korey Sewell <ksewell@umich.edu> | 2009-05-12 15:01:14 -0400 |
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committer | Korey Sewell <ksewell@umich.edu> | 2009-05-12 15:01:14 -0400 |
commit | f41df0ee08467711c613faadf9879052ab7196ed (patch) | |
tree | b5ad5be9cecdec14d6f646e099edf9efcc8b38b0 /src/cpu/ras.cc | |
parent | 5127ea226a0a2cd75334c5af4cb182a1fd9b6cf1 (diff) | |
download | gem5-f41df0ee08467711c613faadf9879052ab7196ed.tar.xz |
inorder-o3: allow both to compile together
allow InOrder and O3CPU to be compiled at the same time: need to make branch prediction filed shared by both models
Diffstat (limited to 'src/cpu/ras.cc')
-rw-r--r-- | src/cpu/ras.cc | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/cpu/ras.cc b/src/cpu/ras.cc new file mode 100644 index 000000000..f9939259a --- /dev/null +++ b/src/cpu/ras.cc @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2004-2005 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/o3/ras.hh" + +void +ReturnAddrStack::init(unsigned _numEntries) +{ + numEntries = _numEntries; + usedEntries = 0; + tos = 0; + + addrStack.resize(numEntries); + + for (int i = 0; i < numEntries; ++i) + addrStack[i] = 0; +} + +void +ReturnAddrStack::reset() +{ + usedEntries = 0; + tos = 0; + for (int i = 0; i < numEntries; ++i) + addrStack[i] = 0; +} + +void +ReturnAddrStack::push(const Addr &return_addr) +{ + incrTos(); + + addrStack[tos] = return_addr; + + if (usedEntries != numEntries) { + ++usedEntries; + } +} + +void +ReturnAddrStack::pop() +{ + if (usedEntries > 0) { + --usedEntries; + } + + decrTos(); +} + +void +ReturnAddrStack::restore(unsigned top_entry_idx, + const Addr &restored_target) +{ + tos = top_entry_idx; + + addrStack[tos] = restored_target; +} |