scoreboard.hh revision 2689
12292SN/A/* 22689Sktlim@umich.edu * Copyright (c) 2005-2006 The Regents of The University of Michigan 32292SN/A * All rights reserved. 42292SN/A * 52292SN/A * Redistribution and use in source and binary forms, with or without 62292SN/A * modification, are permitted provided that the following conditions are 72292SN/A * met: redistributions of source code must retain the above copyright 82292SN/A * notice, this list of conditions and the following disclaimer; 92292SN/A * redistributions in binary form must reproduce the above copyright 102292SN/A * notice, this list of conditions and the following disclaimer in the 112292SN/A * documentation and/or other materials provided with the distribution; 122292SN/A * neither the name of the copyright holders nor the names of its 132292SN/A * contributors may be used to endorse or promote products derived from 142292SN/A * this software without specific prior written permission. 152292SN/A * 162292SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172292SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182292SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192292SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202292SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212292SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222292SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232292SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242292SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252292SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262292SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272689Sktlim@umich.edu * 282689Sktlim@umich.edu * Authors: Korey Sewell 292689Sktlim@umich.edu * Kevin Lim 302292SN/A */ 312292SN/A 322292SN/A#ifndef __CPU_O3_SCOREBOARD_HH__ 332292SN/A#define __CPU_O3_SCOREBOARD_HH__ 342292SN/A 352292SN/A#include <iostream> 362292SN/A#include <utility> 372292SN/A#include <vector> 382292SN/A#include "arch/alpha/isa_traits.hh" 392292SN/A#include "base/trace.hh" 402292SN/A#include "base/traceflags.hh" 412292SN/A#include "cpu/o3/comm.hh" 422292SN/A 432292SN/A/** 442292SN/A * Implements a simple scoreboard to track which registers are ready. 452292SN/A * This class assumes that the fp registers start, index wise, right after 462292SN/A * the integer registers. The misc. registers start, index wise, right after 472292SN/A * the fp registers. 482292SN/A * @todo: Fix up handling of the zero register in case the decoder does not 492292SN/A * automatically make insts that write the zero register into nops. 502292SN/A */ 512292SN/Aclass Scoreboard 522292SN/A{ 532292SN/A public: 542292SN/A /** Constructs a scoreboard. 552292SN/A * @param activeThreads The number of active threads. 562292SN/A * @param _numLogicalIntRegs Number of logical integer registers. 572292SN/A * @param _numPhysicalIntRegs Number of physical integer registers. 582292SN/A * @param _numLogicalFloatRegs Number of logical fp registers. 592292SN/A * @param _numPhysicalFloatRegs Number of physical fp registers. 602292SN/A * @param _numMiscRegs Number of miscellaneous registers. 612292SN/A * @param _zeroRegIdx Index of the zero register. 622292SN/A */ 632292SN/A Scoreboard(unsigned activeThreads, 642292SN/A unsigned _numLogicalIntRegs, 652292SN/A unsigned _numPhysicalIntRegs, 662292SN/A unsigned _numLogicalFloatRegs, 672292SN/A unsigned _numPhysicalFloatRegs, 682292SN/A unsigned _numMiscRegs, 692292SN/A unsigned _zeroRegIdx); 702292SN/A 712292SN/A /** Destructor. */ 722292SN/A ~Scoreboard() {} 732292SN/A 742292SN/A /** Returns the name of the scoreboard. */ 752292SN/A std::string name() const; 762292SN/A 772292SN/A /** Checks if the register is ready. */ 782292SN/A bool getReg(PhysRegIndex ready_reg); 792292SN/A 802292SN/A /** Sets the register as ready. */ 812292SN/A void setReg(PhysRegIndex phys_reg); 822292SN/A 832292SN/A /** Sets the register as not ready. */ 842292SN/A void unsetReg(PhysRegIndex ready_reg); 852292SN/A 862292SN/A private: 872292SN/A /** Scoreboard of physical integer registers, saying whether or not they 882292SN/A * are ready. 892292SN/A */ 902292SN/A std::vector<bool> regScoreBoard; 912292SN/A 922292SN/A /** Number of logical integer registers. */ 932292SN/A int numLogicalIntRegs; 942292SN/A 952292SN/A /** Number of physical integer registers. */ 962292SN/A int numPhysicalIntRegs; 972292SN/A 982292SN/A /** Number of logical floating point registers. */ 992292SN/A int numLogicalFloatRegs; 1002292SN/A 1012292SN/A /** Number of physical floating point registers. */ 1022292SN/A int numPhysicalFloatRegs; 1032292SN/A 1042292SN/A /** Number of miscellaneous registers. */ 1052292SN/A int numMiscRegs; 1062292SN/A 1072292SN/A /** Number of logical integer + float registers. */ 1082292SN/A int numLogicalRegs; 1092292SN/A 1102292SN/A /** Number of physical integer + float registers. */ 1112292SN/A int numPhysicalRegs; 1122292SN/A 1132292SN/A /** The logical index of the zero register. */ 1142292SN/A int zeroRegIdx; 1152292SN/A}; 1162292SN/A 1172292SN/A#endif 118