Mercurial > hg > Members > kono > jpf-core

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:61d41facf527
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 * Increment local variable by constant
27 * No change
28 */
29 public class IINC extends Instruction implements JVMInstruction {
30
31 protected int index;
32 protected int increment;
33
34 public IINC(int localVarIndex, int increment) {
35 this.index = localVarIndex;
36 this.increment = increment;
37 }
38
39 @Override
40 public Instruction execute(ThreadInfo ti) {
41 StackFrame frame = ti.getModifiableTopFrame();
42
43 int v = frame.getLocalVariable(index);
44 v += increment;
45
46 frame.setLocalVariable(index, v, false);
47
48 return getNext(ti);
49 }
50
51 @Override
52 public int getLength() {
53 return 3; // opcode, index, const
54 }
55
56 @Override
57 public int getByteCode() {
58 return 0x84; // ?? wide
59 }
60
61 @Override
62 public void accept(JVMInstructionVisitor insVisitor) {
63 insVisitor.visit(this);
64 }
65
66 public int getIndex() {
67 return index;
68 }
69
70 public int getIncrement() {
71 return increment;
72 }
73
74 @Override
75 public String toPostExecString() {
76 return "iinc " + index + ' ' + increment;
77 }
78 }