func_unit.cc revision 10936
1/* 2 * Copyright (c) 2002-2006 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 * Authors: Steve Raasch 29 */ 30 31#include <sstream> 32 33#include "base/misc.hh" 34#include "cpu/func_unit.hh" 35 36using namespace std; 37 38 39//////////////////////////////////////////////////////////////////////////// 40// 41// The funciton unit 42// 43FuncUnit::FuncUnit() 44{ 45 opLatencies.fill(0); 46 pipelined.fill(false); 47 capabilityList.reset(); 48} 49 50 51// Copy constructor 52FuncUnit::FuncUnit(const FuncUnit &fu) 53{ 54 55 for (int i = 0; i < Num_OpClasses; ++i) { 56 opLatencies[i] = fu.opLatencies[i]; 57 pipelined[i] = fu.pipelined[i]; 58 } 59 60 capabilityList = fu.capabilityList; 61} 62 63 64void 65FuncUnit::addCapability(OpClass cap, unsigned oplat, bool pipeline) 66{ 67 if (oplat == 0) 68 panic("FuncUnit: you don't really want a zero-cycle latency do you?"); 69 70 capabilityList.set(cap); 71 72 opLatencies[cap] = oplat; 73 pipelined[cap] = pipeline; 74} 75 76bool 77FuncUnit::provides(OpClass capability) 78{ 79 return capabilityList[capability]; 80} 81 82bitset<Num_OpClasses> 83FuncUnit::capabilities() 84{ 85 return capabilityList; 86} 87 88unsigned & 89FuncUnit::opLatency(OpClass cap) 90{ 91 return opLatencies[cap]; 92} 93 94bool 95FuncUnit::isPipelined(OpClass capability) 96{ 97 return pipelined[capability]; 98} 99 100//////////////////////////////////////////////////////////////////////////// 101// 102// The SimObjects we use to get the FU information into the simulator 103// 104//////////////////////////////////////////////////////////////////////////// 105 106// 107// We use 2 objects to specify this data in the INI file: 108// (1) OpDesc - Describes the operation class & latencies 109// (multiple OpDesc objects can refer to the same 110// operation classes) 111// (2) FUDesc - Describes the operations available in the unit & 112// the number of these units 113// 114// 115 116 117// 118// The operation-class description object 119// 120OpDesc * 121OpDescParams::create() 122{ 123 return new OpDesc(this); 124} 125 126// 127// The FuDesc object 128// 129FUDesc * 130FUDescParams::create() 131{ 132 return new FUDesc(this); 133} 134