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annotate graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/ReverseBytesNode.java @ 19396:7e2c87dae93e
Create static final NodeClass field named TYPE in Node subclasses.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Mon, 16 Feb 2015 15:43:03 +0100 |
parents | f57d86eb036f |
children | 61d3cb8e1280 |
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1 /* |
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2 * Copyright (c) 2012, 2015, 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.code.*; |
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26 import com.oracle.graal.api.meta.*; |
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27 import com.oracle.graal.compiler.common.type.*; |
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28 import com.oracle.graal.graph.*; |
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29 import com.oracle.graal.graph.spi.*; |
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30 import com.oracle.graal.nodeinfo.*; |
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31 import com.oracle.graal.nodes.*; |
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32 import com.oracle.graal.nodes.calc.*; |
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33 import com.oracle.graal.nodes.spi.*; |
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34 |
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35 @NodeInfo |
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36 public final class ReverseBytesNode extends UnaryNode implements LIRLowerable { |
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37 |
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38 public static final NodeClass TYPE = NodeClass.get(ReverseBytesNode.class); |
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39 |
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40 public ReverseBytesNode(ValueNode value) { |
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41 super(TYPE, StampFactory.forKind(value.getKind()), value); |
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42 assert getKind() == Kind.Int || getKind() == Kind.Long; |
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43 } |
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44 |
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45 @Override |
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46 public boolean inferStamp() { |
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47 IntegerStamp valueStamp = (IntegerStamp) getValue().stamp(); |
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48 Stamp newStamp; |
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49 if (getKind() == Kind.Int) { |
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50 long mask = CodeUtil.mask(Kind.Int.getBitCount()); |
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51 newStamp = IntegerStamp.stampForMask(valueStamp.getBits(), reverse((int) valueStamp.downMask()) & mask, reverse((int) valueStamp.upMask()) & mask); |
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52 } else if (getKind() == Kind.Long) { |
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53 newStamp = IntegerStamp.stampForMask(valueStamp.getBits(), reverse(valueStamp.downMask()), reverse(valueStamp.upMask())); |
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54 } else { |
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55 return false; |
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56 } |
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57 return updateStamp(newStamp); |
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58 } |
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59 |
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60 @Override |
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61 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { |
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62 if (forValue.isConstant()) { |
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63 JavaConstant c = forValue.asJavaConstant(); |
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64 return ConstantNode.forIntegerKind(getKind(), getKind() == Kind.Int ? reverse(c.asInt()) : reverse(c.asLong())); |
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65 } |
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66 return this; |
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67 } |
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68 |
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69 @NodeIntrinsic |
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70 public static int reverse(int v) { |
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71 return Integer.reverseBytes(v); |
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72 } |
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73 |
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74 @NodeIntrinsic |
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75 public static long reverse(long v) { |
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76 return Long.reverseBytes(v); |
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77 } |
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78 |
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79 @Override |
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80 public void generate(NodeLIRBuilderTool gen) { |
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81 Value result = gen.getLIRGeneratorTool().emitByteSwap(gen.operand(getValue())); |
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82 gen.setResult(this, result); |
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83 } |
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84 } |