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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/DivNode.java @ 19526:8fc336a04d77

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Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 20 Feb 2015 22:22:55 +0100
parents 61d3cb8e1280
children 93c50cefb9e8
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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.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.compiler.common.type.ArithmeticOpTable.*;
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29 import com.oracle.graal.compiler.common.type.ArithmeticOpTable.BinaryOp.*;
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30 import com.oracle.graal.graph.*;
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31 import com.oracle.graal.graph.spi.*;
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32 import com.oracle.graal.lir.gen.*;
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33 import com.oracle.graal.nodeinfo.*;
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34 import com.oracle.graal.nodes.*;
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35 import com.oracle.graal.nodes.spi.*;
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37 @NodeInfo(shortName = "/")
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38 public final class DivNode extends BinaryArithmeticNode<Div> {
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39
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40 public static final NodeClass<DivNode> TYPE = NodeClass.create(DivNode.class);
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41
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42 public DivNode(ValueNode x, ValueNode y) {
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43 super(TYPE, ArithmeticOpTable::getDiv, x, y);
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44 }
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45
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46 public static ValueNode create(ValueNode x, ValueNode y) {
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47 BinaryOp<Div> op = ArithmeticOpTable.forStamp(x.stamp()).getDiv();
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48 Stamp stamp = op.foldStamp(x.stamp(), y.stamp());
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49 ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp);
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50 if (tryConstantFold != null) {
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51 return tryConstantFold;
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52 } else {
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53 return new DivNode(x, y);
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54 }
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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 forX, ValueNode forY) {
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59 ValueNode ret = super.canonical(tool, forX, forY);
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60 if (ret != this) {
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61 return ret;
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62 }
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63
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64 if (forY.isConstant()) {
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65 Constant c = forY.asConstant();
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66 if (getOp(forX, forY).isNeutral(c)) {
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67 return forX;
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68 }
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69 if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getKind().isNumericInteger()) {
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70 long i = ((PrimitiveConstant) c).asLong();
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71 boolean signFlip = false;
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72 if (i < 0) {
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73 i = -i;
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74 signFlip = true;
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75 }
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76 ValueNode divResult = null;
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77 if (CodeUtil.isPowerOf2(i)) {
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78 divResult = new RightShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(i)));
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79 }
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80 if (divResult != null) {
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81 if (signFlip) {
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82 return new NegateNode(divResult);
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83 } else {
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84 return divResult;
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85 }
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86 }
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87 }
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88 }
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89 return this;
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90 }
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92 @Override
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93 public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) {
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94 builder.setResult(this, gen.emitDiv(builder.operand(getX()), builder.operand(getY()), null));
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95 }
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96 }