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comparison src/main/gov/nasa/jpf/jvm/bytecode/LDC2_W.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package gov.nasa.jpf.jvm.bytecode;
19
20 import gov.nasa.jpf.vm.Instruction;
21 import gov.nasa.jpf.vm.StackFrame;
22 import gov.nasa.jpf.vm.ThreadInfo;
23
24
25 /**
26 * Push long or double from runtime constant pool (wide index)
27 * ... => ..., value
28 */
29 public class LDC2_W extends Instruction implements JVMInstruction {
30
31 public enum Type {LONG, DOUBLE};
32
33 protected Type type;
34 protected long value;
35
36 public LDC2_W(long l){
37 value = l;
38 type = Type.LONG;
39 }
40
41 public LDC2_W(double d){
42 value = Double.doubleToLongBits(d);
43 type = Type.DOUBLE;
44 }
45
46 @Override
47 public Instruction execute (ThreadInfo ti) {
48 StackFrame frame = ti.getModifiableTopFrame();
49
50 frame.pushLong(value);
51 return getNext(ti);
52 }
53
54 @Override
55 public int getLength() {
56 return 3; // opcode, index1, index2
57 }
58
59 @Override
60 public int getByteCode () {
61 return 0x14;
62 }
63
64 public Type getType() {
65 return type;
66 }
67
68 public double getDoubleValue(){
69 if(type!=Type.DOUBLE){
70 throw new IllegalStateException();
71 }
72
73 return Double.longBitsToDouble(value);
74 }
75
76 public long getValue() {
77 return value;
78 }
79
80 @Override
81 public void accept(JVMInstructionVisitor insVisitor) {
82 insVisitor.visit(this);
83 }
84 }