/*
* Simbler - Where Assembly becomes easy. Interactive and very easy, Simbler is
* a great tool to help students and interested people to learn and simulate
* the basics of Assembly Language.
*
* Copyright (C) 2011 Guilherme de Oliveira Martins
* http://www.gmartins.com.br - guilherme@gmartins.com.br
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
package br.com.gmartins.simbler.mnemonics;
import br.com.gmartins.simbler.mnemonics.helpers.MnemonicsMap;
import br.com.gmartins.simbler.mnemonics.helpers.Commands;
import br.com.gmartins.simbler.components.MainPanel;
import br.com.gmartins.simbler.helpers.RegexMatcher;
import br.com.gmartins.simbler.instructions.Instruction;
import br.com.gmartins.simbler.instructions.value.Value;
import br.com.gmartins.simbler.cpu.ALU;
/**
*
* @author Guilherme
*/
public class DIV extends Commands {
public DIV(MainPanel main) {
super(main);
}
@Override
public void execute() {
final String workingCommand = "DIV";
String regex0 = MnemonicsMap.getInstance().getMnemonicsMap().get(workingCommand).getRegexList().get(0).getRegex(true);
String regex1 = MnemonicsMap.getInstance().getMnemonicsMap().get(workingCommand).getRegexList().get(1).getRegex(true);
String regex2 = MnemonicsMap.getInstance().getMnemonicsMap().get(workingCommand).getRegexList().get(2).getRegex(true);
// MATCHES DIV @1, DIV @100
//REGEX[0] - "DIV @[0-9]{1,9}"
// MATCHES DIV 400, DIV 300
//REGEX[1] - "DIV [0-9]{1,9}"
// MATCHES DIV AX, DIV DX
//REGEX[2] - "DIV [ABCD]X"
if (RegexMatcher.matches(regex0, getCurrentInstruction().getLineCommand())) {
// Pega o comando na posição definida pelo numero após o @
Instruction dest = getInstructionAt(getCurrentInstruction().getValue().toInteger());
// Subtrai o valor definido no ADD com o valor atual de AX
Value value = ALU.div(getRegisters().getAx().getValue(), dest.getValue());
// Define em AX o novo valor.
getRegisters().getAx().setValue(value);
} else if (RegexMatcher.matches(regex1, getCurrentInstruction().getLineCommand())) {
// Subtrai o valor definido no ADD com o valor atual de AX
Value value = ALU.div(getRegisters().getAx().getValue(), getCurrentInstruction().getValue());
// Define o novo valor no AX
getRegisters().getAx().setValue(value);
} else if (RegexMatcher.matches(regex2, getCurrentInstruction().getLineCommand())) {
// Subtrai o valor do registrador definido em ADD com o valor de AX
Value value = ALU.div(getRegisters().getAx().getValue(), getCurrentInstruction().getRegister().getValue());
// Define o novo valor em AX
getRegisters().getAx().setValue(value);
}
}
}