KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > gov > nasa > jpf > jvm > bytecode > LADD


1 //
2
// Copyright (C) 2005 United States Government as represented by the
3
// Administrator of the National Aeronautics and Space Administration
4
// (NASA). All Rights Reserved.
5
//
6
// This software is distributed under the NASA Open Source Agreement
7
// (NOSA), version 1.3. The NOSA has been approved by the Open Source
8
// Initiative. See the file NOSA-1.3-JPF at the top of the distribution
9
// directory tree for the complete NOSA document.
10
//
11
// THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12
// KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13
// LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14
// SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15
// A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16
// THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17
// DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18
//
19
package gov.nasa.jpf.jvm.bytecode;
20
21 import gov.nasa.jpf.jvm.KernelState;
22 import gov.nasa.jpf.jvm.SystemState;
23 import gov.nasa.jpf.jvm.ThreadInfo;
24
25 import org.apache.bcel.classfile.ConstantPool;
26
27
28 /**
29  * Add long
30  * ..., value1, value2 => ..., result
31  */

32 public class LADD extends Instruction {
33   public void setPeer (org.apache.bcel.generic.Instruction i, ConstantPool cp) {
34   }
35
36   public Instruction execute (SystemState ss, KernelState ks, ThreadInfo th) {
37     long v1 = th.longPop();
38     long v2 = th.longPop();
39
40     th.longPush(v1 + v2);
41
42     return getNext(th);
43   }
44
45   public int getByteCode () {
46     return 0x61;
47   }
48 }
49
Popular Tags