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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/XorNode.java @ 11355:01269a181628

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add bitwise "not" operation
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 16 Aug 2013 13:59:25 +0200
parents 2ad1435489d1
children 04b039d82e86 9a747d8e0d0f
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1 /*
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2 * Copyright (c) 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.oracle.graal.nodes.calc;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.graph.*;
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27 import com.oracle.graal.nodes.*;
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28 import com.oracle.graal.nodes.spi.*;
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29 import com.oracle.graal.nodes.type.*;
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30
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31 @NodeInfo(shortName = "^")
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32 public final class XorNode extends BitLogicNode implements Canonicalizable {
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33
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34 public XorNode(Kind kind, ValueNode x, ValueNode y) {
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35 super(kind, x, y);
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36 }
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37
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38 @Override
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39 public boolean inferStamp() {
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40 return updateStamp(StampTool.xor(x().stamp(), y().stamp()));
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41 }
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42
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43 @Override
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44 public ValueNode canonical(CanonicalizerTool tool) {
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45 if (x() == y()) {
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46 return ConstantNode.forIntegerKind(kind(), 0, graph());
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47 }
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48 if (x().isConstant() && !y().isConstant()) {
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49 return graph().unique(new XorNode(kind(), y(), x()));
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50 }
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51 if (x().isConstant()) {
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52 if (kind() == Kind.Int) {
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53 return ConstantNode.forInt(x().asConstant().asInt() ^ y().asConstant().asInt(), graph());
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54 } else {
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55 assert kind() == Kind.Long;
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56 return ConstantNode.forLong(x().asConstant().asLong() ^ y().asConstant().asLong(), graph());
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57 }
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58 } else if (y().isConstant()) {
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59 if (kind() == Kind.Int) {
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60 int c = y().asConstant().asInt();
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61 if (c == 0) {
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62 return x();
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63 } else if (c == -1) {
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64 return graph().unique(new NotNode(x()));
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65 }
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66 } else {
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67 assert kind() == Kind.Long;
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68 long c = y().asConstant().asLong();
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69 if (c == 0) {
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70 return x();
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71 } else if (c == -1) {
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72 return graph().unique(new NotNode(x()));
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73 }
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74 }
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75 return BinaryNode.reassociate(this, ValueNode.isConstantPredicate());
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76 }
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77 return this;
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78 }
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79
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80 @Override
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81 public void generate(ArithmeticLIRGenerator gen) {
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82 gen.setResult(this, gen.emitXor(gen.operand(x()), gen.operand(y())));
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83 }
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84 }