Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/jvm/bytecode/ISHR.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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-1:000000000000 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 * Arithmetic shift right int
27 * ..., value1, value2 => ..., result
28 */
29 public class ISHR extends Instruction implements JVMInstruction {
30
31 @Override
32 public Instruction execute (ThreadInfo ti) {
33 StackFrame frame = ti.getModifiableTopFrame();
34
35 int v1 = frame.pop();
36 int v2 = frame.pop();
37
38 frame.push(v2 >> v1);
39
40 return getNext( ti);
41 }
42
43 @Override
44 public int getByteCode () {
45 return 0x7A;
46 }
47
48 @Override
49 public void accept(JVMInstructionVisitor insVisitor) {
50 insVisitor.visit(this);
51 }
52 }