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Java > Open Source Codes > gov > nasa > jpf > jvm > bytecode > LDC2_W


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.ClassInfo;
22 import gov.nasa.jpf.jvm.KernelState;
23 import gov.nasa.jpf.jvm.SystemState;
24 import gov.nasa.jpf.jvm.ThreadInfo;
25 import gov.nasa.jpf.jvm.Types;
26
27 import org.apache.bcel.classfile.ConstantDouble;
28 import org.apache.bcel.classfile.ConstantLong;
29 import org.apache.bcel.classfile.ConstantPool;
30 import org.apache.bcel.generic.ConstantPoolGen;
31 import org.apache.bcel.generic.Type;
32
33
34 /**
35  * Push long or double from runtime constant pool (wide index)
36  * ... => ..., value
37  */
38 public class LDC2_W extends Instruction {
39   private long value;
40
41   public void setPeer (org.apache.bcel.generic.Instruction i, ConstantPool cp) {
42     ConstantPoolGen cpg = ClassInfo.getConstantPoolGen(cp);
43     Type type = ((org.apache.bcel.generic.LDC2_W) i).getType(cpg);
44
45     if (type == Type.LONG) {
46       value = ((ConstantLong) cp.getConstant(
47                      ((org.apache.bcel.generic.LDC2_W) i).getIndex())).getBytes();
48     } else {
49       value = Types.doubleToLong(
50                     ((ConstantDouble) cp.getConstant(
51                            ((org.apache.bcel.generic.LDC2_W) i).getIndex())).getBytes());
52     }
53   }
54
55   public Instruction execute (SystemState ss, KernelState ks, ThreadInfo th) {
56     th.longPush(value);
57
58     return getNext(th);
59   }
60
61   public int getByteCode () {
62     return 0x14;
63   }
64 }
65
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