Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscInstructionDescriptionCreator.java @ 4138:82af018d61db
Merge fixes.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 22:03:44 +0100 |
parents | e233f5660da4 |
children | bc8527f3071c |
rev | line source |
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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 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 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 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 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<Object>(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<RiscInstructionDescription>(); |
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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<RiscTemplate>(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 } |