regfile.cc revision 11793
1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 3 * Copyright (c) 2013 Advanced Micro Devices, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Kevin Lim 30 * Gabe Black 31 * Steve Reinhardt 32 */ 33 34#include "cpu/o3/regfile.hh" 35 36#include "cpu/o3/free_list.hh" 37 38PhysRegFile::PhysRegFile(unsigned _numPhysicalIntRegs, 39 unsigned _numPhysicalFloatRegs, 40 unsigned _numPhysicalCCRegs) 41 : intRegFile(_numPhysicalIntRegs), 42 floatRegFile(_numPhysicalFloatRegs), 43 ccRegFile(_numPhysicalCCRegs), 44 baseFloatRegIndex(_numPhysicalIntRegs), 45 baseCCRegIndex(_numPhysicalIntRegs + _numPhysicalFloatRegs), 46 totalNumRegs(_numPhysicalIntRegs 47 + _numPhysicalFloatRegs 48 + _numPhysicalCCRegs) 49{ 50 if (TheISA::NumCCRegs == 0 && _numPhysicalCCRegs != 0) { 51 // Just make this a warning and go ahead and allocate them 52 // anyway, to keep from having to add checks everywhere 53 warn("Non-zero number of physical CC regs specified, even though\n" 54 " ISA does not use them.\n"); 55 } 56} 57 58 59void 60PhysRegFile::initFreeList(UnifiedFreeList *freeList) 61{ 62 // Initialize the free lists. 63 PhysRegIndex reg_idx = 0; 64 65 // The initial batch of registers are the integer ones 66 while (reg_idx < baseFloatRegIndex) { 67 freeList->addIntReg(reg_idx++); 68 } 69 70 // The next batch of the registers are the floating-point physical 71 // registers; put them onto the floating-point free list. 72 while (reg_idx < baseCCRegIndex) { 73 freeList->addFloatReg(reg_idx++); 74 } 75 76 // The rest of the registers are the condition-code physical 77 // registers; put them onto the condition-code free list. 78 while (reg_idx < totalNumRegs) { 79 freeList->addCCReg(reg_idx++); 80 } 81} 82