func_unit.cc revision 10807
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 capabilityList.reset(); 46} 47 48 49// Copy constructor 50FuncUnit::FuncUnit(const FuncUnit &fu) 51{ 52 53 for (int i = 0; i < Num_OpClasses; ++i) { 54 opLatencies[i] = fu.opLatencies[i]; 55 pipelined[i] = fu.pipelined[i]; 56 } 57 58 capabilityList = fu.capabilityList; 59} 60 61 62void 63FuncUnit::addCapability(OpClass cap, unsigned oplat, bool pipeline) 64{ 65 if (oplat == 0) 66 panic("FuncUnit: you don't really want a zero-cycle latency do you?"); 67 68 capabilityList.set(cap); 69 70 opLatencies[cap] = oplat; 71 pipelined[cap] = pipeline; 72} 73 74bool 75FuncUnit::provides(OpClass capability) 76{ 77 return capabilityList[capability]; 78} 79 80bitset<Num_OpClasses> 81FuncUnit::capabilities() 82{ 83 return capabilityList; 84} 85 86unsigned & 87FuncUnit::opLatency(OpClass cap) 88{ 89 return opLatencies[cap]; 90} 91 92bool 93FuncUnit::isPipelined(OpClass capability) 94{ 95 return pipelined[capability]; 96} 97 98//////////////////////////////////////////////////////////////////////////// 99// 100// The SimObjects we use to get the FU information into the simulator 101// 102//////////////////////////////////////////////////////////////////////////// 103 104// 105// We use 2 objects to specify this data in the INI file: 106// (1) OpDesc - Describes the operation class & latencies 107// (multiple OpDesc objects can refer to the same 108// operation classes) 109// (2) FUDesc - Describes the operations available in the unit & 110// the number of these units 111// 112// 113 114 115// 116// The operation-class description object 117// 118OpDesc * 119OpDescParams::create() 120{ 121 return new OpDesc(this); 122} 123 124// 125// The FuDesc object 126// 127FUDesc * 128FUDescParams::create() 129{ 130 return new FUDesc(this); 131} 132