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annotate graal/GraalCompiler/src/com/sun/c1x/ir/NegateOp.java @ 2509:16b9a8b5ad39

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Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:50:44 +0200
parents graal/Compiler/src/com/sun/c1x/ir/NegateOp.java@9ec15d6914ca
children 51ebe5f0516f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2507
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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.sun.c1x.debug.*;
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26 import com.sun.c1x.util.*;
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27 import com.sun.cri.bytecode.*;
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28
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29 /**
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30 * The {@code NegateOp} instruction negates its operand.
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31 *
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32 * @author Ben L. Titzer
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33 */
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34 public final class NegateOp extends Instruction {
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35
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36 Value x;
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37
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38 /**
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39 * Creates new NegateOp instance.
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40 * @param x the instruction producing the value that is input to this instruction
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41 */
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42 public NegateOp(Value x) {
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43 super(x.kind);
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44 this.x = x;
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45 }
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46
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47 /**
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48 * Gets the instruction producing input to this instruction.
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49 * @return the instruction that produces this instruction's input
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50 */
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51 public Value x() {
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52 return x;
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53 }
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54
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55 @Override
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56 public void inputValuesDo(ValueClosure closure) {
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57 x = closure.apply(x);
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58 }
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59
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60 @Override
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61 public void accept(ValueVisitor v) {
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62 v.visitNegateOp(this);
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63 }
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64
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65 @Override
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66 public int valueNumber() {
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67 return Util.hash1(Bytecodes.INEG, x);
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68 }
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69
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70 @Override
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71 public boolean valueEqual(Instruction i) {
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72 if (i instanceof NegateOp) {
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73 NegateOp o = (NegateOp) i;
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74 return x == o.x;
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75 }
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76 return false;
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77 }
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78
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79 @Override
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80 public void print(LogStream out) {
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81 out.print("- ").print(x());
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82 }
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83 }