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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerConvertNode.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 93c50cefb9e8
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1 /*
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2 * Copyright (c) 2014, 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 java.io.*;
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26 import java.util.function.*;
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27
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28 import com.oracle.graal.api.meta.*;
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29 import com.oracle.graal.compiler.common.type.*;
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30 import com.oracle.graal.compiler.common.type.ArithmeticOpTable.*;
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31 import com.oracle.graal.graph.*;
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32 import com.oracle.graal.graph.spi.*;
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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 /**
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38 * An {@code IntegerConvert} converts an integer to an integer of different width.
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39 */
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40 @NodeInfo
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41 public abstract class IntegerConvertNode<OP, REV> extends UnaryNode implements ConvertNode, ArithmeticLIRLowerable {
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42 @SuppressWarnings("rawtypes") public static final NodeClass<IntegerConvertNode> TYPE = NodeClass.create(IntegerConvertNode.class);
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43
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44 protected final SerializableIntegerConvertFunction<OP> getOp;
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45 protected final SerializableIntegerConvertFunction<REV> getReverseOp;
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46
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47 protected final int inputBits;
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48 protected final int resultBits;
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49
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50 protected interface SerializableIntegerConvertFunction<T> extends Function<ArithmeticOpTable, IntegerConvertOp<T>>, Serializable {
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51 }
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52
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53 protected IntegerConvertNode(NodeClass<? extends IntegerConvertNode<OP, REV>> c, SerializableIntegerConvertFunction<OP> getOp, SerializableIntegerConvertFunction<REV> getReverseOp, int inputBits,
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54 int resultBits, ValueNode input) {
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55 super(c, getOp.apply(ArithmeticOpTable.forStamp(input.stamp())).foldStamp(inputBits, resultBits, input.stamp()), input);
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56 this.getOp = getOp;
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57 this.getReverseOp = getReverseOp;
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58 this.inputBits = inputBits;
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59 this.resultBits = resultBits;
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60 }
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61
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62 public int getInputBits() {
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63 return inputBits;
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64 }
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65
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66 public int getResultBits() {
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67 return resultBits;
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68 }
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69
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70 protected final IntegerConvertOp<OP> getOp(ValueNode forValue) {
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71 return getOp.apply(ArithmeticOpTable.forStamp(forValue.stamp()));
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72 }
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73
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74 @Override
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75 public Constant convert(Constant c, ConstantReflectionProvider constantReflection) {
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76 return getOp(getValue()).foldConstant(getInputBits(), getResultBits(), c);
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77 }
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78
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79 @Override
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80 public Constant reverse(Constant c, ConstantReflectionProvider constantReflection) {
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81 IntegerConvertOp<REV> reverse = getReverseOp.apply(ArithmeticOpTable.forStamp(stamp()));
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82 return reverse.foldConstant(getResultBits(), getInputBits(), c);
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83 }
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84
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85 @Override
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86 public boolean inferStamp() {
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87 return updateStamp(getOp(getValue()).foldStamp(inputBits, resultBits, getValue().stamp()));
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88 }
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89
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90 @Override
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91 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
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92 ValueNode synonym = findSynonym(getOp(forValue), forValue, inputBits, resultBits, stamp());
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93 if (synonym != null) {
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94 return synonym;
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95 }
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96 return this;
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97 }
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98
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99 protected static <T> ValueNode findSynonym(IntegerConvertOp<T> operation, ValueNode value, int inputBits, int resultBits, Stamp stamp) {
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100 if (inputBits == resultBits) {
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101 return value;
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102 } else if (value.isConstant()) {
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103 return ConstantNode.forPrimitive(stamp, operation.foldConstant(inputBits, resultBits, value.asConstant()));
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104 }
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105 return null;
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106 }
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107
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108 public static ValueNode convert(ValueNode input, Stamp stamp) {
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109 return convert(input, stamp, false);
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110 }
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111
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112 public static ValueNode convert(ValueNode input, Stamp stamp, StructuredGraph graph) {
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113 ValueNode convert = convert(input, stamp, false);
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114 if (!convert.isAlive()) {
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115 assert !convert.isDeleted();
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116 convert = graph.addOrUnique(convert);
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117 }
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118 return convert;
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119 }
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120
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121 public static ValueNode convertUnsigned(ValueNode input, Stamp stamp) {
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122 return convert(input, stamp, true);
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123 }
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124
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125 public static ValueNode convert(ValueNode input, Stamp stamp, boolean zeroExtend) {
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126 IntegerStamp fromStamp = (IntegerStamp) input.stamp();
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127 IntegerStamp toStamp = (IntegerStamp) stamp;
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128
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129 ValueNode result;
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130 if (toStamp.getBits() == fromStamp.getBits()) {
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131 result = input;
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132 } else if (toStamp.getBits() < fromStamp.getBits()) {
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133 result = new NarrowNode(input, fromStamp.getBits(), toStamp.getBits());
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134 } else if (zeroExtend) {
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135 // toStamp.getBits() > fromStamp.getBits()
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136 result = new ZeroExtendNode(input, toStamp.getBits());
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137 } else {
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138 // toStamp.getBits() > fromStamp.getBits()
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139 result = new SignExtendNode(input, toStamp.getBits());
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140 }
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141
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142 IntegerStamp resultStamp = (IntegerStamp) result.stamp();
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143 assert toStamp.getBits() == resultStamp.getBits();
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144 return result;
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145 }
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146 }