Mercurial > hg > Members > kono > jpf-core

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