FPLDSTInstructions.java

/*
 * FPLDSTInstructions.java
 *
 * 27th may 2007
 * (c) 2006 EduMips64 project - Trubia Massimo
 *
 * This file is part of the EduMIPS64 project, and is released under the GNU
 * General Public License.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.edumips64.core.is;
import org.edumips64.core.*;
import org.edumips64.utils.*;

/**This is the base class of FP Load store instructions
 *
 * @author Trubia Massimo
 */

public abstract class FPLDSTInstructions extends LDSTInstructions {
  final static int FT_FIELD = 0;
  final static int FT_FIELD_INIT = 11;
  final static int FT_FIELD_LENGTH = 5;
  FPLDSTInstructions(Memory memory) {
    super(memory);
    this.syntax = "%F,%L(%R)";
    this.paramCount = 3;
  }
  public void ID() throws RAWException, IrregularWriteOperationException, IrregularStringOfBitsException, TwosComplementSumException, WAWException {}
  public void EX() throws IrregularStringOfBitsException, IntegerOverflowException {}
  public void MEM() throws IrregularStringOfBitsException, NotAlignException, MemoryElementNotFoundException, AddressErrorException, IrregularWriteOperationException {}
  public void WB() throws IrregularStringOfBitsException {}
  public void pack() throws IrregularStringOfBitsException {
    //conversion of instruction parameters of params list to the "repr" 32 binary value
    repr.setBits(OPCODE_VALUE, 0);
    repr.setBits(Converter.intToBin(BASE_FIELD_LENGTH, params.get(BASE_FIELD)), BASE_FIELD_INIT);
    repr.setBits(Converter.intToBin(FT_FIELD_LENGTH, params.get(FT_FIELD)), FT_FIELD_INIT);
    repr.setBits(Converter.intToBin(OFFSET_FIELD_LENGTH, params.get(OFFSET_FIELD)), OFFSET_FIELD_INIT);
  }

  // FP Instructions don't use the doMEM method, let's provide an empty
  // implementation.
  public void doMEM() throws IrregularStringOfBitsException, NotAlignException, MemoryElementNotFoundException, AddressErrorException, IrregularWriteOperationException {};

}