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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/FloatEqualsNode.java @ 16841:cbd42807a31f
moved NodeInfo and friends into separate com.oracle.graal.nodeinfo project so that annotation processor can be applied to the base Node class
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 15 Aug 2014 11:34:38 +0200 |
parents | 5d468add216f |
children | 06c15e88d383 |
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1 /* |
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2 * Copyright (c) 2011, 2014, 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.oracle.graal.nodes.calc; |
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24 |
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25 import com.oracle.graal.compiler.common.*; |
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26 import com.oracle.graal.compiler.common.calc.*; |
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27 import com.oracle.graal.compiler.common.type.*; |
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28 import com.oracle.graal.graph.spi.*; |
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29 import com.oracle.graal.nodeinfo.*; |
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30 import com.oracle.graal.nodes.*; |
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31 import com.oracle.graal.nodes.util.*; |
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32 |
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33 @NodeInfo(shortName = "==") |
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34 public class FloatEqualsNode extends CompareNode { |
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35 |
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36 /** |
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37 * Constructs a new floating point equality comparison node. |
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38 * |
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39 * @param x the instruction producing the first input to the instruction |
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40 * @param y the instruction that produces the second input to this instruction |
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41 */ |
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42 public FloatEqualsNode(ValueNode x, ValueNode y) { |
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43 super(x, y); |
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44 assert x.stamp() instanceof FloatStamp && y.stamp() instanceof FloatStamp : x.stamp() + " " + y.stamp(); |
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45 assert x.stamp().isCompatible(y.stamp()); |
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46 } |
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47 |
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48 @Override |
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49 public Condition condition() { |
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50 return Condition.EQ; |
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51 } |
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52 |
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53 @Override |
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54 public boolean unorderedIsTrue() { |
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55 return false; |
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56 } |
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57 |
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58 @Override |
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59 public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { |
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60 ValueNode result = super.canonical(tool, forX, forY); |
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61 if (result != this) { |
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62 return result; |
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63 } |
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64 if (forX.stamp() instanceof FloatStamp && forY.stamp() instanceof FloatStamp) { |
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65 FloatStamp xStamp = (FloatStamp) forX.stamp(); |
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66 FloatStamp yStamp = (FloatStamp) forY.stamp(); |
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67 if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY) && xStamp.isNonNaN() && yStamp.isNonNaN()) { |
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68 return LogicConstantNode.tautology(); |
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69 } else if (xStamp.alwaysDistinct(yStamp)) { |
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70 return LogicConstantNode.contradiction(); |
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71 } |
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72 } |
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73 return this; |
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74 } |
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75 |
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76 @Override |
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77 protected CompareNode duplicateModified(ValueNode newX, ValueNode newY) { |
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78 if (newX.stamp() instanceof FloatStamp && newY.stamp() instanceof FloatStamp) { |
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79 return new FloatEqualsNode(newX, newY); |
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80 } else if (newX.stamp() instanceof IntegerStamp && newY.stamp() instanceof IntegerStamp) { |
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81 return new IntegerEqualsNode(newX, newY); |
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82 } |
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83 throw GraalInternalError.shouldNotReachHere(); |
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84 } |
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85 } |