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annotate graal/GraalCompiler/src/com/sun/c1x/ir/NegateOp.java @ 2848:c061a6be3728

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merge
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 31 May 2011 15:19:30 +0200
parents caf55daa41dc bfce42cd9c07
children 14708c03abba
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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 import com.sun.cri.ci.*;
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30
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31 /**
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32 * The {@code NegateOp} instruction negates its operand.
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33 */
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34 public final class NegateOp extends FloatingNode {
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35
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36 private static final int INPUT_COUNT = 2;
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37 private static final int INPUT_X = 0;
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38 private static final int INPUT_Y = 1;
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39
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40 private static final int SUCCESSOR_COUNT = 0;
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41
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42 @Override
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43 protected int inputCount() {
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44 return super.inputCount() + INPUT_COUNT;
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45 }
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46
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47 @Override
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48 protected int successorCount() {
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49 return super.successorCount() + SUCCESSOR_COUNT;
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50 }
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51
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52 /**
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53 * The instruction producing input to this instruction.
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54 */
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55 public Value x() {
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56 return (Value) inputs().get(super.inputCount() + INPUT_X);
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57 }
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58
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59 public Value setX(Value n) {
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60 return (Value) inputs().set(super.inputCount() + INPUT_X, n);
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61 }
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62
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63 /**
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64 * Creates new NegateOp instance.
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65 * @param x the instruction producing the value that is input to this instruction
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66 */
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67 public NegateOp(Value x, Graph graph) {
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68 super(x.kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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69 setX(x);
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70 }
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71
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72 // for copying
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73 private NegateOp(CiKind kind, Graph graph) {
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74 super(kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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75 }
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76
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77 @Override
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78 public void accept(ValueVisitor v) {
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79 v.visitNegateOp(this);
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80 }
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81
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82 @Override
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83 public int valueNumber() {
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84 return Util.hash1(Bytecodes.INEG, x());
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85 }
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86
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87 @Override
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88 public boolean valueEqual(Node i) {
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89 if (i instanceof NegateOp) {
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90 NegateOp o = (NegateOp) i;
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91 return x() == o.x();
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92 }
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93 return false;
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94 }
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95
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96 @Override
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97 public void print(LogStream out) {
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98 out.print("- ").print(x());
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99 }
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100
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101 @Override
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102 public Node copy(Graph into) {
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103 NegateOp x = new NegateOp(kind, into);
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104 x.setNonNull(isNonNull());
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105 return x;
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106 }
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107 }