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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/MulNode.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 880717e44675
children 34c0014aaf5b
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1 /*
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2 * Copyright (c) 2011, 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.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.BinaryOp;
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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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36
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37 @NodeInfo(shortName = "*")
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38 public class MulNode extends BinaryArithmeticNode<Mul> implements NarrowableArithmeticNode {
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39
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40 public static final NodeClass<MulNode> TYPE = NodeClass.create(MulNode.class);
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41
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42 public MulNode(ValueNode x, ValueNode y) {
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43 this(TYPE, x, y);
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44 }
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45
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46 protected MulNode(NodeClass<? extends MulNode> c, ValueNode x, ValueNode y) {
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47 super(c, ArithmeticOpTable::getMul, x, y);
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48 }
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49
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50 public static ValueNode create(ValueNode x, ValueNode y) {
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51 BinaryOp<Mul> op = ArithmeticOpTable.forStamp(x.stamp()).getMul();
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52 Stamp stamp = op.foldStamp(x.stamp(), y.stamp());
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53 ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp);
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54 if (tryConstantFold != null) {
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55 return tryConstantFold;
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56 } else {
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57 return new MulNode(x, y);
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58 }
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59 }
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60
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61 @Override
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62 public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
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63 ValueNode ret = super.canonical(tool, forX, forY);
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64 if (ret != this) {
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65 return ret;
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66 }
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67
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68 if (forX.isConstant() && !forY.isConstant()) {
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69 return new MulNode(forY, forX);
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70 }
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71 if (forY.isConstant()) {
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72 BinaryOp<Mul> op = getOp(forX, forY);
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73 Constant c = forY.asConstant();
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74 if (op.isNeutral(c)) {
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75 return forX;
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76 }
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77
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78 if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getKind().isNumericInteger()) {
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79 long i = ((PrimitiveConstant) c).asLong();
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80 boolean signFlip = false;
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81 if (i < 0) {
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82 i = -i;
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83 signFlip = true;
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84 }
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85 if (i > 0) {
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86 ValueNode mulResult = null;
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87 long bit1 = i & -i;
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88 long bit2 = i - bit1;
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89 bit2 = bit2 & -bit2; // Extract 2nd bit
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90 if (CodeUtil.isPowerOf2(i)) { //
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91 mulResult = new LeftShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(i)));
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92 } else if (bit2 + bit1 == i) { // We can work with two shifts and add
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93 ValueNode shift1 = new LeftShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(bit1)));
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94 ValueNode shift2 = new LeftShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(bit2)));
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95 mulResult = new AddNode(shift1, shift2);
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96 } else if (CodeUtil.isPowerOf2(i + 1)) { // shift and subtract
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97 ValueNode shift1 = new LeftShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(i + 1)));
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98 mulResult = new SubNode(shift1, forX);
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99 }
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100 if (mulResult != null) {
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101 if (signFlip) {
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102 return new NegateNode(mulResult);
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103 } else {
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104 return mulResult;
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105 }
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106 }
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107 }
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108 }
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109
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110 if (op.isAssociative()) {
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111 // canonicalize expressions like "(a * 1) * 2"
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112 return reassociate(this, ValueNode.isConstantPredicate(), forX, forY);
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113 }
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114 }
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115 return this;
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116 }
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117
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118 @Override
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119 public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) {
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120 Value op1 = builder.operand(getX());
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121 Value op2 = builder.operand(getY());
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122 if (!getY().isConstant() && !BinaryArithmeticNode.livesLonger(this, getY(), builder)) {
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123 Value tmp = op1;
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124 op1 = op2;
17276
ffb974bef674 moved Node valueNumber and valueEquals logic (optionally) to generated nodes
Doug Simon <doug.simon@oracle.com>
parents: 17217
diff changeset
125 op2 = tmp;
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
126 }
18843
5e80dd2f1783 Extend emitMul, emitAdd and emitSub in ArithmeticLIRGenerator for explicitly requesting to set the flags register. (In AMD64 flags are set implicitly, but on SPARC it is not)
Stefan Anzinger <stefan.anzinger@oracle.com>
parents: 18646
diff changeset
127 builder.setResult(this, gen.emitMul(op1, op2, false));
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
128 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
129 }