1 /* `Deep Thought', a softcore CPU implemented on a FPGA
3 Copyright (C) 2010 Markus Hofstaetter <markus.manrow@gmx.at>
4 Copyright (C) 2010 Martin Perner <e0725782@student.tuwien.ac.at>
5 Copyright (C) 2010 Stefan Rebernig <stefan.rebernig@gmail.com>
6 Copyright (C) 2010 Manfred Schwarz <e0725898@student.tuwien.ac.at>
7 Copyright (C) 2010 Bernhard Urban <lewurm@gmail.com>
9 This program is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "../Iinstr.hpp"
24 class Csub : public Iinstr {
29 std::string toString();
34 * Name: create_instruction
35 * Purpose: if compiled as shared library, this functions creates the
38 * Returns: pointer to instruction object
40 extern "C" Iinstr* create_instruction() {
44 Iinstr* Csub::getNew() {
49 * Name: destroy_instruction
50 * Purpose: if compiled as shared library, this functions destoys the
53 * Parameter: IInstruction - the instruction object to delete
55 extern "C" void destroy_instruction(Iinstr* p) {
65 void Csub::evalInstr()
67 this->m_d = argbits[0];
68 this->m_c = argbits[1];
71 m_rb = this->getRegister(argbits);
74 m_ra = this->getRegister(argbits);
77 m_rd = this->getRegister(argbits);
80 void Csub::execInstr()
82 //cout << "should exec " << this->toString() << endl;
83 CDat ra = this->m_cpu->getRegister(m_ra);
84 CDat rb = this->m_cpu->getRegister(m_rb);
86 this->m_cpu->setRegister(m_rd, val);
88 this->m_cpu->updateFlags(val, ra, (~rb)+1);
92 std::string Csub::toString()
95 op << this->getName();
100 op << " r" << m_rd << ", r" << m_ra << ", r" << m_rb;