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/*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* Copyright (c) 2013 Advanced Micro Devices, Inc.
* 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
* Gabe Black
* Steve Reinhardt
*/
#include "cpu/o3/regfile.hh"
#include "cpu/o3/free_list.hh"
PhysRegFile::PhysRegFile(unsigned _numPhysicalIntRegs,
unsigned _numPhysicalFloatRegs,
unsigned _numPhysicalCCRegs)
: intRegFile(_numPhysicalIntRegs),
floatRegFile(_numPhysicalFloatRegs),
ccRegFile(_numPhysicalCCRegs),
baseFloatRegIndex(_numPhysicalIntRegs),
baseCCRegIndex(_numPhysicalIntRegs + _numPhysicalFloatRegs),
totalNumRegs(_numPhysicalIntRegs
+ _numPhysicalFloatRegs
+ _numPhysicalCCRegs)
{
if (TheISA::NumCCRegs == 0 && _numPhysicalCCRegs != 0) {
// Just make this a warning and go ahead and allocate them
// anyway, to keep from having to add checks everywhere
warn("Non-zero number of physical CC regs specified, even though\n"
" ISA does not use them.\n");
}
}
void
PhysRegFile::initFreeList(UnifiedFreeList *freeList)
{
// Initialize the free lists.
PhysRegIndex reg_idx = 0;
// The initial batch of registers are the integer ones
while (reg_idx < baseFloatRegIndex) {
freeList->addIntReg(reg_idx++);
}
// The next batch of the registers are the floating-point physical
// registers; put them onto the floating-point free list.
while (reg_idx < baseCCRegIndex) {
freeList->addFloatReg(reg_idx++);
}
// The rest of the registers are the condition-code physical
// registers; put them onto the condition-code free list.
while (reg_idx < totalNumRegs) {
freeList->addCCReg(reg_idx++);
}
}
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