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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscInstructionDescriptionCreator.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.risc;
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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.*;
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28 import com.sun.max.asm.gen.*;
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29 import com.sun.max.asm.gen.risc.bitRange.*;
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30 import com.sun.max.asm.gen.risc.field.*;
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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 */
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35 public abstract class RiscInstructionDescriptionCreator extends InstructionDescriptionCreator<RiscInstructionDescription> {
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36
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37 protected final RiscTemplateCreator templateCreator;
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38
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39 protected RiscInstructionDescriptionCreator(Assembly assembly, RiscTemplateCreator templateCreator) {
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40 super(assembly);
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41 this.templateCreator = templateCreator;
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42 }
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43
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44 @Override
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45 protected RiscInstructionDescription createInstructionDescription(List<Object> specifications) {
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46 return new RiscInstructionDescription(specifications);
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47 }
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48
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49 private static int firstStringIndex(List<Object> specifications) {
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50 for (int i = 0; i < specifications.size(); i++) {
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51 if (specifications.get(i) instanceof String) {
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52 return i;
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53 }
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54 }
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55 throw ProgramError.unexpected("template instruction description without name");
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56 }
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57
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58 private static void setFirstString(List<Object> specifications, String value) {
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59 specifications.set(firstStringIndex(specifications), value);
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60 }
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61
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62 private static void eliminateConstraintFor(Parameter parameter, List<Object> specifications) {
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63 for (final Iterator iterator = specifications.iterator(); iterator.hasNext();) {
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64 final Object s = iterator.next();
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65 if (s instanceof InstructionConstraint) {
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66 final InstructionConstraint constraint = (InstructionConstraint) s;
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67 if (constraint.referencesParameter(parameter)) {
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68 iterator.remove();
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69 }
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70 }
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71 }
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72 }
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73
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74 private static boolean updateSpecifications(List<Object> specifications, Object pattern) {
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75 for (int i = 0; i < specifications.size(); i++) {
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76 final Object specification = specifications.get(i);
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77 if (specification.equals(pattern)) {
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78 specifications.set(i, pattern);
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79 return true;
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80 } else if (pattern instanceof RiscConstant && (specification instanceof OperandField || specification instanceof OptionField)) {
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81 final RiscConstant constant = (RiscConstant) pattern;
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82 final RiscField constantField = constant.field();
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83 final RiscField variableField = (RiscField) specification;
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84 if (variableField.equals(constantField)) {
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85 specifications.set(i, pattern);
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86 if (specification instanceof Parameter) {
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87 eliminateConstraintFor((Parameter) specification, specifications);
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88 }
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89 return true;
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90 }
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91 } else if (pattern instanceof InstructionConstraint && !(pattern instanceof Parameter)) {
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92 specifications.add(pattern);
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93 return true;
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94 } else if (pattern instanceof RiscField) {
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95 if (((RiscField) pattern).bitRange() instanceof OmittedBitRange) {
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96 specifications.add(pattern);
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97 return true;
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98 }
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99 }
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100 }
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101 return false;
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102 }
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103
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104 private RiscInstructionDescription createSyntheticInstructionDescription(String name, RiscTemplate template, Object[] patterns) {
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105 final List<Object> specifications = new ArrayList<>(template.instructionDescription().specifications());
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106 for (Object pattern : patterns) {
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107 if (!updateSpecifications(specifications, pattern)) {
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108 // InstructionDescription with the same name, but different specifications, skip it:
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109 Trace.line(3, name + " not updated with " + pattern + " in " + specifications);
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110 return null;
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111 }
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112 }
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113 setFirstString(specifications, name);
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114 final Class<List<Object>> type = null;
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115 return (RiscInstructionDescription) defineInstructionDescription(Utils.cast(type, specifications)).beSynthetic();
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116 }
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117
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118 /**
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119 * Creates a synthetic instruction from a previously defined (raw or synthetic) instruction
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120 * by replacing one or more parameters of the instruction with a constant or alternative parameter.
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121 *
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122 * @param name the internal (base) name of the new synthetic instruction
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123 * @param templateName the internal name of the original instruction on which the synthetic instruction is based
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124 * @param patterns the replacements for one or more parameters of the original instruction
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125 * @return the newly created instruction descriptions resulting from the substitution wrapped in a RiscInstructionDescriptionModifier
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126 */
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127 protected RiscInstructionDescriptionModifier synthesize(String name, String templateName, Object... patterns) {
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128 final List<RiscInstructionDescription> instructionDescriptions = new ArrayList<>();
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129 // Creating a new VariableSequence here prevents iterator comodification below:
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130 final List<? extends RiscTemplate> nameTemplates = templateCreator.nameToTemplates(templateName);
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131 if (!nameTemplates.isEmpty()) {
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132 final List<RiscTemplate> templates = new ArrayList<>(nameTemplates);
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133 assert !templates.isEmpty();
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134 for (RiscTemplate template : templates) {
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135 final RiscInstructionDescription instructionDescription = createSyntheticInstructionDescription(name, template, patterns);
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136 if (instructionDescription != null) {
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137 instructionDescriptions.add(instructionDescription);
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138 }
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139 }
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140 }
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141 ProgramError.check(!instructionDescriptions.isEmpty());
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142 return new RiscInstructionDescriptionModifier(instructionDescriptions);
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143 }
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144 }