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annotate graal/GraalCompiler/src/com/sun/c1x/ir/NegateOp.java @ 2603:01c5c0443158
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author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 06 May 2011 11:18:15 +0200 |
parents | 51ebe5f0516f |
children | 4a6518c4d17d |
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1 /* |
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.c1x.ir; |
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24 |
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25 import com.oracle.graal.graph.*; |
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26 import com.sun.c1x.debug.*; |
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27 import com.sun.c1x.util.*; |
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28 import com.sun.cri.bytecode.*; |
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29 |
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30 /** |
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31 * The {@code NegateOp} instruction negates its operand. |
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32 * |
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33 * @author Ben L. Titzer |
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34 */ |
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35 public final class NegateOp extends Instruction { |
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36 |
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37 private static final int INPUT_COUNT = 2; |
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38 private static final int INPUT_X = 0; |
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39 private static final int INPUT_Y = 1; |
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40 |
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41 private static final int SUCCESSOR_COUNT = 0; |
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42 |
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43 @Override |
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44 protected int inputCount() { |
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45 return super.inputCount() + INPUT_COUNT; |
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46 } |
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47 |
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48 @Override |
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49 protected int successorCount() { |
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50 return super.successorCount() + SUCCESSOR_COUNT; |
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51 } |
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52 |
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53 /** |
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54 * The instruction producing input to this instruction. |
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55 */ |
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56 public Value x() { |
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57 return (Value) inputs().get(super.inputCount() + INPUT_X); |
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58 } |
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59 |
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60 public Value setX(Value n) { |
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61 return (Value) inputs().set(super.inputCount() + INPUT_X, n); |
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62 } |
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63 |
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64 /** |
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65 * Creates new NegateOp instance. |
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66 * @param x the instruction producing the value that is input to this instruction |
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67 */ |
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68 public NegateOp(Value x, Graph graph) { |
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69 super(x.kind, INPUT_COUNT, SUCCESSOR_COUNT, graph); |
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70 setX(x); |
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71 } |
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72 |
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73 @Override |
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74 public void accept(ValueVisitor v) { |
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75 v.visitNegateOp(this); |
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76 } |
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77 |
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78 @Override |
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79 public int valueNumber() { |
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80 return Util.hash1(Bytecodes.INEG, x()); |
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81 } |
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82 |
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83 @Override |
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84 public boolean valueEqual(Instruction i) { |
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85 if (i instanceof NegateOp) { |
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86 NegateOp o = (NegateOp) i; |
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87 return x() == o.x(); |
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88 } |
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89 return false; |
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90 } |
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91 |
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92 @Override |
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93 public void print(LogStream out) { |
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94 out.print("- ").print(x()); |
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95 } |
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96 } |