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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 "tst_machine.h"
#include <qtmipsexception.h>
#include <registers.h>
using namespace machine;
void MachineTests::registers_gp0() {
Registers r;
QCOMPARE(r.read_gp(0), (unsigned)0);
r.write_gp(0, 0xff);
QCOMPARE(r.read_gp(0), (unsigned)0);
}
void MachineTests::registers_rw_gp() {
Registers r;
for (int i = 1; i < 32; i++) {
r.write_gp(i, 0xf00 + i);
QCOMPARE(r.read_gp(i), (unsigned)(0xf00 + i));
}
}
void MachineTests::registers_rw_hi_lo() {
Registers r;
r.write_hi_lo(false, 0xee);
r.write_hi_lo(true, 0xaa);
QCOMPARE(r.read_hi_lo(false), (unsigned)0xee);
QCOMPARE(r.read_hi_lo(true), (unsigned)0xaa);
}
void MachineTests::registers_pc() {
Registers r;
QCOMPARE(r.read_pc(), (unsigned)0x80020000); // Check initial pc address
QCOMPARE(r.pc_inc(), (unsigned)0x80020004);
QCOMPARE(r.pc_inc(), (unsigned)0x80020008);
QCOMPARE(r.pc_jmp(-0x8), (unsigned)0x80020000);
QCOMPARE(r.pc_jmp(0xC), (unsigned)0x8002000C);
r.pc_abs_jmp(0x80020100);
QCOMPARE(r.read_pc(), (unsigned)0x80020100);
QVERIFY_EXCEPTION_THROWN(r.pc_jmp(0x1), QtMipsExceptionUnalignedJump);
QVERIFY_EXCEPTION_THROWN(r.pc_abs_jmp(0x80020101), QtMipsExceptionUnalignedJump);
}
void MachineTests::registers_compare() {
Registers r1, r2;
QCOMPARE(r1, r2);
// General purpose register
r1.write_gp(1, 24);
QVERIFY(r1 != r2);
r2.write_gp(1, 24);
QCOMPARE(r1, r2);
// Program counter
r1.pc_inc();
QVERIFY(r1 != r2);
r2.pc_inc();
QCOMPARE(r1, r2);
// LO/HI (testing just one as they have common codepath)
r1.write_hi_lo(false, 18);
QVERIFY(r1 != r2);
r2.write_hi_lo(false, 18);
QCOMPARE(r1, r2);
// Now let's try copy (and verify only with gp this time)
Registers r3(r1);
QCOMPARE(r3, r1);
r3.write_gp(12, 19);
QVERIFY(r1 != r3);
r1.write_gp(12, 19);
QCOMPARE(r3, r1);
}
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