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 Cbranchreg : public Iinstr {
32 std::string toString();
37 * Name: create_instruction
38 * Purpose: if compiled as shared library, this functions creates the
41 * Returns: pointer to instruction object
43 extern "C" Iinstr* create_instruction() {
44 return new Cbranchreg();
47 Iinstr* Cbranchreg::getNew()
49 return new Cbranchreg();
52 * Name: destroy_instruction
53 * Purpose: if compiled as shared library, this functions destoys the
56 * Parameter: IInstruction - the instruction object to delete
58 extern "C" void destroy_instruction(Iinstr* p) {
62 Cbranchreg::Cbranchreg() : m_taken(1), m_typ(0)
68 void Cbranchreg::evalInstr()
72 dynamic_bitset<> type = argbits;
74 this->m_typ = type.to_ulong();
84 cerr << "What have you done? 1 bits that have more than 2 values?!" << endl;
88 m_rd = this->getRegister(argbits);
91 void Cbranchreg::execInstr()
93 //cout << "should exec " << this->toString() << endl;
94 CDat pc = this->m_cpu->getRegister(this->m_rd);
95 pc *= 4; //komisch fix?
97 if(this->m_typ == 1) {
98 CDat sp = this->m_cpu->getStack();
100 this->m_cpu->setRAM(sp, this->m_cpu->getNextPC());
101 this->m_cpu->setStack(sp);
103 this->m_cpu->setNextPC(pc);
106 std::string Cbranchreg::toString()
109 op << this->getName();
111 op << this->getConditionFlag();