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annotate graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/nodes/ReverseBytesNode.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents e23980f4a890
children
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1 /*
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2 * Copyright (c) 2012, 2012, 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.snippets.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.gen.*;
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27 import com.oracle.graal.compiler.target.*;
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28 import com.oracle.graal.lir.*;
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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 public class ReverseBytesNode extends FloatingNode implements LIRGenLowerable, Canonicalizable {
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35
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36 @Input private ValueNode value;
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37
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38 public ReverseBytesNode(ValueNode value) {
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39 super(StampFactory.forKind(value.kind()));
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40 assert kind().getStackKind() == Kind.Int || kind() == Kind.Long;
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41 this.value = value;
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42 }
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43
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44 @Override
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45 public ValueNode canonical(CanonicalizerTool tool) {
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46 if (value.isConstant()) {
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47 long v = value.asConstant().asLong();
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48 if (kind().getStackKind() == Kind.Int) {
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49 return ConstantNode.forInt(Integer.reverseBytes((int) v), graph());
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50 } else if (kind() == Kind.Long) {
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51 return ConstantNode.forLong(Long.reverseBytes(v), graph());
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52 }
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53 }
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54 return this;
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55 }
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56
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57 @NodeIntrinsic
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58 public static native int reverse(int v);
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59
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60 @NodeIntrinsic
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61 public static native long reverse(long v);
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62
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63 @Override
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64 public void generate(LIRGenerator gen) {
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65 Variable result = gen.newVariable(value.kind());
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66 gen.emitByteSwap(result, gen.operand(value));
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67 gen.setResult(this, result);
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68 }
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69 }