regfile.cc revision 12105
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 numPhysicalIntRegs(_numPhysicalIntRegs), 45 numPhysicalFloatRegs(_numPhysicalFloatRegs), 46 numPhysicalCCRegs(_numPhysicalCCRegs), 47 totalNumRegs(_numPhysicalIntRegs 48 + _numPhysicalFloatRegs 49 + _numPhysicalCCRegs) 50{ 51 PhysRegIndex phys_reg; 52 PhysRegIndex flat_reg_idx = 0; 53 54 if (TheISA::NumCCRegs == 0 && _numPhysicalCCRegs != 0) { 55 // Just make this a warning and go ahead and allocate them 56 // anyway, to keep from having to add checks everywhere 57 warn("Non-zero number of physical CC regs specified, even though\n" 58 " ISA does not use them.\n"); 59 } 60 // The initial batch of registers are the integer ones 61 for (phys_reg = 0; phys_reg < numPhysicalIntRegs; phys_reg++) { 62 intRegIds.emplace_back(IntRegClass, phys_reg, flat_reg_idx++); 63 } 64 65 // The next batch of the registers are the floating-point physical 66 // registers; put them onto the floating-point free list. 67 for (phys_reg = 0; phys_reg < numPhysicalFloatRegs; phys_reg++) { 68 floatRegIds.emplace_back(FloatRegClass, phys_reg, flat_reg_idx++); 69 } 70 71 // The rest of the registers are the condition-code physical 72 // registers; put them onto the condition-code free list. 73 for (phys_reg = 0; phys_reg < numPhysicalCCRegs; phys_reg++) { 74 ccRegIds.emplace_back(CCRegClass, phys_reg, flat_reg_idx++); 75 } 76 77 // Misc regs have a fixed mapping but still need PhysRegIds. 78 for (phys_reg = 0; phys_reg < TheISA::NumMiscRegs; phys_reg++) { 79 miscRegIds.emplace_back(MiscRegClass, phys_reg, 0); 80 } 81} 82 83 84void 85PhysRegFile::initFreeList(UnifiedFreeList *freeList) 86{ 87 // Initialize the free lists. 88 int reg_idx = 0; 89 90 // The initial batch of registers are the integer ones 91 for (reg_idx = 0; reg_idx < numPhysicalIntRegs; reg_idx++) { 92 assert(intRegIds[reg_idx].regIdx == reg_idx); 93 freeList->addIntReg(&intRegIds[reg_idx]); 94 } 95 96 // The next batch of the registers are the floating-point physical 97 // registers; put them onto the floating-point free list. 98 for (reg_idx = 0; reg_idx < numPhysicalFloatRegs; reg_idx++) { 99 assert(floatRegIds[reg_idx].regIdx == reg_idx); 100 freeList->addFloatReg(&floatRegIds[reg_idx]); 101 } 102 103 // The rest of the registers are the condition-code physical 104 // registers; put them onto the condition-code free list. 105 for (reg_idx = 0; reg_idx < numPhysicalCCRegs; reg_idx++) { 106 assert(ccRegIds[reg_idx].regIdx == reg_idx); 107 freeList->addCCReg(&ccRegIds[reg_idx]); 108 } 109} 110