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


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
26 /**
27  * Store reference into local variable
28  * ..., objectref => ...
29  */
30 public class ASTORE extends LocalVariableInstruction implements StoreInstruction
31 {
32
33   public Instruction execute (SystemState ss, KernelState ks, ThreadInfo th) {
34     //** warning: an ASTORE should store an object reference. However **//
35 //** it is used for subroutines program counters as well. **//
36 boolean ref = th.isOperandRef();
37
38     th.setLocalVariable(index, th.pop(), ref);
39
40     return getNext(th);
41   }
42
43   public int getByteCode () {
44     switch (index) {
45       case 0: return 0x4b;
46       case 1: return 0x4c;
47       case 2: return 0x4d;
48       case 3: return 0x4e;
49     }
50
51     return 0x3A; // ? wide versions ?
52 }
53 }
54
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