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// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#include <QCoreApplication>
#include <QCommandLineParser>
#include <cctype>
#include <iostream>
#include "tracer.h"
#include "reporter.h"
using namespace machine;
using namespace std;
void create_parser(QCommandLineParser &p) {
p.setApplicationDescription("QtMips CLI machine simulator");
p.addHelpOption();
p.addVersionOption();
p.addPositionalArgument("FILE", "Input ELF executable file");
// p.addOptions({}); available only from Qt 5.4+
p.addOption({"pipelined", "Configure CPU to use five stage pipeline."});
p.addOption({"no-delay-slot", "Disable jump delay slot."});
p.addOption({{"trace-fetch", "tr-fetch"}, "Trace fetched instruction (for both pipelined and not core)."});
p.addOption({{"trace-decode", "tr-decode"}, "Trace instruction in decode stage. (only for pipelined core)"});
p.addOption({{"trace-execute", "tr-execute"}, "Trace instruction in execute stage. (only for pipelined core)"});
p.addOption({{"trace-memory", "tr-memory"}, "Trace instruction in memory stage. (only for pipelined core)"});
p.addOption({{"trace-writeback", "tr-writeback"}, "Trace instruction in write back stage. (only for pipelined core)"});
p.addOption({{"trace-pc", "tr-pc"}, "Print program counter register changes."});
p.addOption({{"trace-gp", "tr-gp"}, "Print general purpose register changes. You can use * for all registers.", "REG"});
p.addOption({{"trace-lo", "tr-lo"}, "Print LO register changes."});
p.addOption({{"trace-hi", "tr-hi"}, "Print HI register changes."});
p.addOption({{"dump-registers", "d-regs"}, "Dump registers state at program exit."});
p.addOption({"expect-fail", "Expect that program causes CPU trap and fail if it doesn't."});
p.addOption({"fail-match", "Program should exit with exactly this CPU TRAP. Possible values are I(unsupported Instruction), A(Unsupported ALU operation), O(Overflow/underflow) and J(Unaligned Jump). You can freely combine them. Using this implies expect-fail option.", "TRAP"});
}
void configure_machine(QCommandLineParser &p, MachineConfig &cc) {
QStringList pa = p.positionalArguments();
if (pa.size() != 1) {
std::cerr << "Single ELF file has to be specified" << std::endl;
exit(1);
}
cc.set_elf(pa[0]);
cc.set_delay_slot(!p.isSet("no-delay-slot"));
cc.set_pipelined(p.isSet("pipelined"));
}
void configure_tracer(QCommandLineParser &p, Tracer &tr) {
if (p.isSet("trace-fetch"))
tr.fetch();
if (p.isSet("pipelined")) { // Following are added only if we have stages
if (p.isSet("trace-decode"))
tr.decode();
if (p.isSet("trace-execute"))
tr.execute();
if (p.isSet("trace-memory"))
tr.memory();
if (p.isSet("trace-writeback"))
tr.writeback();
}
if (p.isSet("trace-pc"))
tr.reg_pc();
QStringList gps = p.values("trace-gp");
for (int i = 0; i < gps.size(); i++) {
if (gps[i] == "*") {
for (int y = 0; y < 32; y++)
tr.reg_gp(y);
} else {
bool res;
int num = gps[i].toInt(&res);
if (res && num <= 32) {
tr.reg_gp(num);
} else {
cout << "Unknown register number given for trace-gp: " << gps[i].toStdString() << endl;
exit(1);
}
}
}
if (p.isSet("trace-lo"))
tr.reg_lo();
if (p.isSet("trace-hi"))
tr.reg_hi();
// TODO
}
void configure_reporter(QCommandLineParser &p, Reporter &r) {
if (p.isSet("dump-registers"))
r.regs();
QStringList fail = p.values("fail-match");
for (int i = 0; i < fail.size(); i++) {
for (int y = 0; y < fail[i].length(); y++) {
enum Reporter::FailReason reason;
switch (tolower(fail[i].toStdString()[y])) {
case 'i':
reason = Reporter::FR_I;
break;
case 'a':
reason = Reporter::FR_A;
break;
case 'o':
reason = Reporter::FR_O;
break;
case 'j':
reason = Reporter::FR_J;
break;
default:
cout << "Unknown fail condition: " << fail[i].toStdString()[y] << endl;
exit(1);
}
r.expect_fail(reason);
}
}
if (p.isSet("expect-fail") && !p.isSet("fail-match"))
r.expect_fail(Reporter::FailAny);
// TODO
}
int main(int argc, char *argv[]) {
QCoreApplication app(argc, argv);
app.setApplicationName("qtmips_cli");
app.setApplicationVersion("0.1");
QCommandLineParser p;
create_parser(p);
p.process(app);
MachineConfig cc;
configure_machine(p, cc);
QtMipsMachine machine(cc);
Tracer tr(&machine);
configure_tracer(p, tr);
Reporter r(&app, &machine);
configure_reporter(p, r);
machine.play();
return app.exec();
}
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