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annotate graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/ReverseBytesNode.java @ 16811:5d468add216f

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added @NodeInfo annotations to all Node classes
author Doug Simon <doug.simon@oracle.com>
date Wed, 13 Aug 2014 18:25:45 +0200
parents 388b787a5fe6
children cbd42807a31f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 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.replacements.nodes;
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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.compiler.common.type.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.calc.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.graal.nodes.type.*;
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33
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34 @NodeInfo
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35 public class ReverseBytesNode extends UnaryNode implements LIRLowerable {
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36
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37 public ReverseBytesNode(ValueNode value) {
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38 super(StampFactory.forKind(value.getKind()), value);
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39 assert getKind() == Kind.Int || getKind() == Kind.Long;
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40 }
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41
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42 @Override
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43 public boolean inferStamp() {
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44 IntegerStamp valueStamp = (IntegerStamp) getValue().stamp();
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45 Stamp newStamp;
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46 if (getKind() == Kind.Int) {
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47 long mask = IntegerStamp.defaultMask(Kind.Int.getBitCount());
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48 newStamp = StampTool.stampForMask(valueStamp.getBits(), reverse((int) valueStamp.downMask()) & mask, reverse((int) valueStamp.upMask()) & mask);
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49 } else if (getKind() == Kind.Long) {
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50 newStamp = StampTool.stampForMask(valueStamp.getBits(), reverse(valueStamp.downMask()), reverse(valueStamp.upMask()));
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51 } else {
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52 return false;
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53 }
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54 return updateStamp(newStamp);
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55 }
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56
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57 @Override
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58 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
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59 if (forValue.isConstant()) {
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60 Constant c = forValue.asConstant();
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61 return ConstantNode.forIntegerKind(getKind(), getKind() == Kind.Int ? reverse(c.asInt()) : reverse(c.asLong()));
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62 }
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63 return this;
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64 }
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65
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66 @NodeIntrinsic
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67 public static int reverse(int v) {
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68 return Integer.reverseBytes(v);
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69 }
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71 @NodeIntrinsic
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72 public static long reverse(long v) {
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73 return Long.reverseBytes(v);
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74 }
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75
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76 @Override
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77 public void generate(NodeLIRBuilderTool gen) {
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78 Value result = gen.getLIRGeneratorTool().emitByteSwap(gen.operand(getValue()));
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79 gen.setResult(this, result);
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80 }
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81 }