| /* |
| * 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++); |
| } |
| } |