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1   /*
2    * @(#) IADD.java Jan 8, 2004
3    * 
4    * Copyright (c) 2003 Delft University of Technology Jaffalaan 5, 2628 BX Delft,
5    * the Netherlands All rights reserved.
6    * 
7    * This software is proprietary information of Delft University of Technology
8    * The code is published under the General Public License
9    */
10  package nl.tudelft.simulation.dsol.interpreter.operations;
11  
12  import nl.tudelft.simulation.dsol.interpreter.LocalVariable;
13  import nl.tudelft.simulation.dsol.interpreter.OperandStack;
14  import nl.tudelft.simulation.dsol.interpreter.classfile.Constant;
15  import nl.tudelft.simulation.language.primitives.Primitive;
16  
17  /***
18   * The IADD operation as defined in <a
19   * href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc6.html">
20   * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc6.html
21   * </a>.
22   * <p>
23   * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
24   * University of Technology </a>, the Netherlands. <br>
25   * See for project information <a
26   * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
27   * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
28   * License (GPL) </a>, no warranty <br>
29   * 
30   * @author <a href="http://www.tbm.tudelft.nl/webstaf/peterja/index.htm">Peter
31   *         Jacobs </a><a
32   *         href="http://www.tbm.tudelft.nl/webstaf/alexandv/index.htm">Alexander
33   *         Verbraeck </a>
34   * @version 1.3 Apr 6, 2004
35   * @since 1.4
36   */
37  public class IADD extends VoidOperation
38  {
39  	/*** OP refers to the operand code */
40  	public static final int OP = 96;
41  
42  	/***
43  	 * constructs a new IADD
44  	 */
45  	public IADD()
46  	{
47  		super();
48  	}
49  
50  
51  	/***
52  	 * @see nl.tudelft.simulation.dsol.interpreter.operations.VoidOperation
53  	 *      #execute(nl.tudelft.simulation.dsol.interpreter.OperandStack,
54  	 *      nl.tudelft.simulation.dsol.interpreter.classfile.Constant[],
55  	 *      nl.tudelft.simulation.dsol.interpreter.LocalVariable[])
56  	 */
57  	public void execute(final OperandStack stack,
58  			final Constant[] constantPool, final LocalVariable[] localVariables)
59  	{
60  		int i2 = Primitive.toInteger(stack.pop()).intValue();
61  		int i1 = Primitive.toInteger(stack.pop()).intValue();
62  		stack.push(new Integer(i1 + i2));
63  	}
64  
65  	/***
66  	 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getByteLength()
67  	 */
68  	public int getByteLength()
69  	{
70  		return OPCODE_BYTE_LENGTH;
71  	}
72  
73  	/***
74  	 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getOpcode()
75  	 */
76  	public int getOpcode()
77  	{
78  		return IADD.OP;
79  	}
80  }