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 Caddi : 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* Caddi::getNew() {
50 * Name: destroy_instruction
51 * Purpose: if compiled as shared library, this functions destoys the
54 * Parameter: IInstruction - the instruction object to delete
56 extern "C" void destroy_instruction(Iinstr* p) {
66 void Caddi::evalInstr()
68 this->m_s = argbits[2];
69 this->m_c = argbits[1];
70 this->m_d = argbits[0];
73 dynamic_bitset<> immb = argbits;
75 this->m_imm = this->generate12ImmSign(immb.to_ulong());
78 m_ra = this->getRegister(argbits);
81 m_rd = this->getRegister(argbits);
84 void Caddi::execInstr()
86 //cout << "should exec " << this->toString() << endl;
87 CDat ra = this->m_cpu->getRegister(m_ra);
88 CDatd reg = ra + this->m_imm;
89 this->m_cpu->setRegister(m_rd, reg);
91 this->m_cpu->updateFlags(reg, ra, this->m_imm);
95 std::string Caddi::toString()
98 op << this->getName();
104 op << this->getConditionFlag() << " r" << m_rd << ", r" << m_ra << ", " << m_imm;