free_list.cc revision 2292
1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include "base/trace.hh" 30 31#include "cpu/o3/free_list.hh" 32 33SimpleFreeList::SimpleFreeList(unsigned activeThreads, 34 unsigned _numLogicalIntRegs, 35 unsigned _numPhysicalIntRegs, 36 unsigned _numLogicalFloatRegs, 37 unsigned _numPhysicalFloatRegs) 38 : numLogicalIntRegs(_numLogicalIntRegs), 39 numPhysicalIntRegs(_numPhysicalIntRegs), 40 numLogicalFloatRegs(_numLogicalFloatRegs), 41 numPhysicalFloatRegs(_numPhysicalFloatRegs), 42 numPhysicalRegs(numPhysicalIntRegs + numPhysicalFloatRegs) 43{ 44 DPRINTF(FreeList, "Creating new free list object.\n"); 45 46 // Put all of the extra physical registers onto the free list. This 47 // means excluding all of the base logical registers. 48 for (PhysRegIndex i = numLogicalIntRegs * activeThreads; 49 i < numPhysicalIntRegs; ++i) 50 { 51 freeIntRegs.push(i); 52 } 53 54 // Put all of the extra physical registers onto the free list. This 55 // means excluding all of the base logical registers. Because the 56 // float registers' indices start where the physical registers end, 57 // some math must be done to determine where the free registers start. 58 PhysRegIndex i = numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads); 59 60 for ( ; i < numPhysicalRegs; ++i) 61 { 62 freeFloatRegs.push(i); 63 } 64} 65 66std::string 67SimpleFreeList::name() const 68{ 69 return "cpu.freelist"; 70} 71