109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/*
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* Copyright (c) 2005-2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Korey Sewell
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* Kevin Lim
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*/
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#include "cpu/o3/scoreboard.hh"
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Scoreboard::Scoreboard(unsigned activeThreads,
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unsigned _numLogicalIntRegs,
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unsigned _numPhysicalIntRegs,
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unsigned _numLogicalFloatRegs,
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unsigned _numPhysicalFloatRegs,
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unsigned _numMiscRegs,
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unsigned _zeroRegIdx)
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: numLogicalIntRegs(_numLogicalIntRegs),
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numPhysicalIntRegs(_numPhysicalIntRegs),
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numLogicalFloatRegs(_numLogicalFloatRegs),
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numPhysicalFloatRegs(_numPhysicalFloatRegs),
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numMiscRegs(_numMiscRegs),
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zeroRegIdx(_zeroRegIdx)
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{
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//Get Register Sizes
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numLogicalRegs = numLogicalIntRegs + numLogicalFloatRegs;
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numPhysicalRegs = numPhysicalIntRegs + numPhysicalFloatRegs;
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//Resize scoreboard appropriately
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regScoreBoard.resize(numPhysicalRegs + (numMiscRegs * activeThreads));
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//Initialize values
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for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
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regScoreBoard[i] = 1;
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}
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for (int i= numPhysicalIntRegs;
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i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
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i++) {
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regScoreBoard[i] = 1;
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}
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for (int i = numPhysicalRegs;
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i < numPhysicalRegs + (numMiscRegs * activeThreads);
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i++) {
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regScoreBoard[i] = 1;
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}
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}
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std::string
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Scoreboard::name() const
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{
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return "cpu.scoreboard";
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}
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bool
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Scoreboard::getReg(PhysRegIndex phys_reg)
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{
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// Always ready if int or fp zero reg.
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if (phys_reg == zeroRegIdx ||
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phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
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return 1;
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}
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return regScoreBoard[phys_reg];
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}
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void
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Scoreboard::setReg(PhysRegIndex phys_reg)
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{
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DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
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regScoreBoard[phys_reg] = 1;
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}
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void
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Scoreboard::unsetReg(PhysRegIndex ready_reg)
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{
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if (ready_reg == zeroRegIdx ||
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ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
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// Don't do anything if int or fp zero reg.
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return;
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}
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regScoreBoard[ready_reg] = 0;
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}
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