?? cv_spec_state.cc
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/* * Copyright (c) 2001, 2002, 2003, 2004, 2005 * The Regents of The University of Michigan * All Rights Reserved * * This code is part of the M5 simulator, developed by Nathan Binkert, * Erik Hallnor, Steve Raasch, and Steve Reinhardt, with contributions * from Ron Dreslinski, Dave Greene, Lisa Hsu, Kevin Lim, Ali Saidi, * and Andrew Schultz. * * Permission is granted to use, copy, create derivative works and * redistribute this software and such derivative works for any * purpose, so long as the copyright notice above, this grant of * permission, and the disclaimer below appear in all copies made; and * so long as the name of The University of Michigan is not used in * any advertising or publicity pertaining to the use or distribution * of this software without specific, written prior authorization. * * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT, * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH * DAMAGES. *//* * This file is a part of the SimpleScalar tool suite written by * Todd M. Austin as a part of the Multiscalar Research Project. * * The tool suite is currently maintained by Doug Burger and Todd M. Austin. * * Copyright (C) 1997, 1998 by Todd M. Austin * * This source file is distributed "as is" in the hope that it will be * useful. The tool set comes with no warranty, and no author or * distributor accepts any responsibility for the consequences of its * use. * * Everyone is granted permission to copy, modify and redistribute * this tool set under the following conditions: * * This source code is distributed for non-commercial use only. * Please contact the maintainer for restrictions applying to * commercial use. * * Permission is granted to anyone to make or distribute copies * of this source code, either as received or modified, in any * medium, provided that all copyright notices, permission and * nonwarranty notices are preserved, and that the distributor * grants the recipient permission for further redistribution as * permitted by this document. * * Permission is granted to distribute this file in compiled * or executable form under the same conditions that apply for * source code, provided that either: * * A. it is accompanied by the corresponding machine-readable * source code, * B. it is accompanied by a written offer, with no time limit, * to give anyone a machine-readable copy of the corresponding * source code in return for reimbursement of the cost of * distribution. This written offer must permit verbatim * duplication by anyone, or * C. it is distributed by someone who received only the * executable form, and is accompanied by a copy of the * written offer of source code that they received concurrently. * * In other words, you are welcome to use, share and improve this * source file. You are forbidden to forbid anyone else to use, share * and improve what you give them. */#include <string>#include "encumbered/cpu/full/cv_spec_state.hh"#include "encumbered/cpu/full/rob_station.hh"voidCreateVecSpecState::initialize(CreateVector *cv){ true_cv = cv; // // Copy the use_spec_cv bit vector // stored_spec_cv = cv->use_spec; // // Copy the relevent CV links // num_entries = stored_spec_cv.count(); cv_list->clear(); cv_entry temp; unsigned n = 0; for (unsigned reg = 0; reg < TotalNumRegs && n != num_entries; ++reg) { if (stored_spec_cv[reg]) { temp.link = cv->spec_cv[reg]; temp.reg = reg; // the producer CAN be null! temp.seq = temp.link.rs ? cv->spec_cv[reg].rs->seq : 0; cv_list->add_tail(temp); ++n; } }}voidCreateVecSpecState::restore(){ // // Clear spec state prior to restoration // true_cv->init_spec(); if (num_entries) { // // Copy the original state back in... // for (cv_iterator j = cv_list->head(); j.notnull(); j = j.next()) { if (j->link.rs) { // Make sure that this producer hasn't committed... // (we clear 'inst' when we remove the instruction // from the ROB) if (j->seq == j->link.rs->seq && j->link.rs->inst != NULL) { // Also make sure that it hasn't written back yet... if (!j->link.rs->completed) true_cv->spec_cv[j->reg] = j->link; } } else { // we need to keep the null producer true_cv->spec_cv[j->reg] = j->link; } } true_cv->use_spec = stored_spec_cv; } else true_cv->use_spec.reset();}
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