Mercurial > hg > truffle

annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/InstructionDescription.java @ 4142:bc8527f3071c

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Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +0100
parents e233f5660da4
children
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1 /*
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2 * Copyright (c) 2007, 2011, 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.sun.max.asm.gen;
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24
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25 import java.util.*;
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26
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27 import com.sun.max.asm.gen.cisc.x86.*;
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28 import com.sun.max.asm.gen.risc.*;
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29 import com.sun.max.asm.gen.risc.field.*;
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30 import com.sun.max.lang.*;
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31 import com.sun.max.program.*;
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32
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33 /**
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34 * A sequence of objects that describe group of closely related instructions. An
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35 * {@link #Template instruction template} is created for each instruction in the
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36 * group.
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37 * <p>
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38 * The types of objects that an instruction description contains
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39 * depend on the whether the underlying platform is CISC or RISC.
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40 * The types for these two instruction categories are enumerated by
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41 * the {@code visit...} methods in the {@link RiscInstructionDescriptionVisitor}
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42 * and {@link X86InstructionDescriptionVisitor} classes.
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43 */
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44 public abstract class InstructionDescription implements Iterable<Object>, Cloneable {
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45
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46 private static int nextSerial;
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47
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48 private int serial;
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49
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50 /**
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51 * The components of the description.
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52 */
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53 private final List<Object> specifications;
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54
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55 public InstructionDescription(List<Object> specifications) {
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56 this.specifications = specifications;
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57 this.serial = nextSerial++;
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58 }
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59
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60 public int serial() {
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61 return serial;
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62 }
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63
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64 /**
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65 * @return the objects from which this description is composed
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66 */
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67 public List<Object> specifications() {
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68 return specifications;
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69 }
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70
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71 private List<InstructionConstraint> constraints;
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72
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73 /**
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74 * @return the {@link InstructionConstraint} instances (if any) within this description
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75 */
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76 public List<InstructionConstraint> constraints() {
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77 if (constraints == null) {
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78 constraints = new ArrayList<>(specifications.size());
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79 for (Object s : specifications) {
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80 if (s instanceof InstructionConstraint) {
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81 constraints.add((InstructionConstraint) s);
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82 }
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83 }
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84 }
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85 return constraints;
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86 }
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87
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88 private String architectureManualSection;
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89
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90 public InstructionDescription setArchitectureManualSection(String section) {
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91 architectureManualSection = section;
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92 return this;
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93 }
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94
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95 public String architectureManualSection() {
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96 return architectureManualSection;
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97 }
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98
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99 private String externalName;
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100
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101 public String externalName() {
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102 return externalName;
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103 }
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104
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105 public InstructionDescription setExternalName(String name) {
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106 this.externalName = name;
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107 return this;
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108 }
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109
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110 private boolean isDisassemblable = true;
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111
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112 /**
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113 * Determines if the templates created from the description can be recovered from an assembled instruction.
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114 * This is almost always possible. One example where it isn't is an instruction description that
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115 * has a parameter that is not correlated one-to-one with some bits in the encoded instruction.
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116 * In RISC architectures, this will be any instruction that has at least one {@link InputOperandField}
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117 * parameter.
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118 */
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119 public boolean isDisassemblable() {
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120 return isDisassemblable;
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121 }
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122
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123 public InstructionDescription beNotDisassemblable() {
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124 isDisassemblable = false;
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125 return this;
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126 }
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127
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128 public boolean isSynthetic() {
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129 return false;
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130 }
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131
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132 private boolean isExternallyTestable = true;
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133
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134 public boolean isExternallyTestable() {
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135 return isExternallyTestable;
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136 }
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137
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138 public InstructionDescription beNotExternallyTestable() {
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139 isExternallyTestable = false;
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140 return this;
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141 }
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142
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143 private WordWidth requiredAddressSize;
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144
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145 public WordWidth requiredAddressSize() {
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146 return requiredAddressSize;
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147 }
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148
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149 public InstructionDescription requireAddressSize(WordWidth addressSize) {
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150 this.requiredAddressSize = addressSize;
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151 return this;
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152 }
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153
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154 private WordWidth requiredOperandSize;
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155
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156 public WordWidth requiredOperandSize() {
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157 return requiredOperandSize;
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158 }
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159
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160 public InstructionDescription requireOperandSize(WordWidth operandSize) {
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161 this.requiredOperandSize = operandSize;
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162 return this;
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163 }
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164
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165 public Iterator<Object> iterator() {
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166 return specifications.iterator();
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167 }
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168
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169 @Override
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170 public InstructionDescription clone() {
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171 try {
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172 final InstructionDescription clone = (InstructionDescription) super.clone();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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173 clone.serial = ++nextSerial;
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174 return clone;
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175 } catch (CloneNotSupportedException cloneNotSupportedException) {
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176 throw ProgramError.unexpected(cloneNotSupportedException);
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177 }
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178 }
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179
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180 @Override
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181 public final int hashCode() {
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182 return serial;
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183 }
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184
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185 @Override
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186 public final boolean equals(Object object) {
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187 if (object instanceof InstructionDescription) {
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188 return serial == ((InstructionDescription) object).serial;
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189 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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190 return false;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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191 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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192
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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193 }