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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/Template.java @ 4138:82af018d61db

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Merge fixes.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 22:03:44 +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.lang.reflect.*;
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26 import java.util.*;
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27
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28 import com.sun.max.*;
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29 import com.sun.max.asm.*;
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30 import com.sun.max.program.*;
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31
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32 /**
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33 * An internal representation of an assembler method.
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34 */
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35 public abstract class Template implements Cloneable, Comparable<Template> {
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36
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37 private int serial = -1;
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38 private InstructionDescription instructionDescription;
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39 private int labelParameterIndex = -1;
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40
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41 protected Template(InstructionDescription instructionDescription) {
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42 this.instructionDescription = instructionDescription;
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43 }
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44
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45 protected Template(InstructionDescription instructionDescription, int serial) {
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46 this.instructionDescription = instructionDescription;
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47 this.serial = serial;
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48 }
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49
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50 public int serial() {
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51 return serial;
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52 }
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53
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54 public void setSerial(int serial) {
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55 this.serial = serial;
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56 }
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57
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58 public InstructionDescription instructionDescription() {
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59 return instructionDescription;
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60 }
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61
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62 /**
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63 * Gets the index of this template's parameter that can be represented as a {@linkplain Label label}.
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64 * A template is guaranteed to at most one such parameter.
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65 *
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66 * @return the index of this template's label parameter or -1 if it does not have one
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67 */
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68 public int labelParameterIndex() {
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69 return labelParameterIndex;
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70 }
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71
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72 /**
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73 * Call this right before adding a parameter that may be represented by a label.
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74 */
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75 protected void setLabelParameterIndex() {
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76 if (labelParameterIndex != -1) {
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77 throw ProgramError.unexpected("a template can have at most one label parameter");
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78 }
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79 labelParameterIndex = parameters().size();
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80 }
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81
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82 public abstract String assemblerMethodName();
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83
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84 protected Method assemblerMethod;
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85
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86 /**
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87 * Determines if this template is redundant with respect to another
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88 * {@linkplain #canonicalRepresentative() canonical} template.
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89 * Two templates are redundant if they both have the same name and operands.
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90 * Redundant pairs of instructions are assumed to implement the same machine
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91 * instruction semantics but may have different encodings.
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92 *
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93 * @return whether this template is redundant with respect some other template
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94 */
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95 public final boolean isRedundant() {
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96 return canonicalRepresentative() != null;
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97 }
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98
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99 /**
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100 * @see #isRedundant()
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101 */
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102 public abstract Template canonicalRepresentative();
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103
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104 /**
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105 * The name of the Java method that will be created from this template.
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106 */
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107 private String internalName;
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108
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109 public String internalName() {
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110 return internalName;
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111 }
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112
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113 protected void setInternalName(String name) {
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114 this.internalName = name;
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115 }
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116
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117 public String externalName() {
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118 if (instructionDescription.externalName() != null) {
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119 return instructionDescription.externalName();
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120 }
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121 return internalName();
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122 }
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123
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124 public boolean isDisassemblable() {
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125 return instructionDescription.isDisassemblable();
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126 }
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127
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128 public boolean isExternallyTestable() {
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129 return instructionDescription.isExternallyTestable();
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130 }
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131
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132 public abstract List<? extends Operand> operands();
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133
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134 public abstract List<? extends Parameter> parameters();
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135
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136 /**
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137 * Gets the argument from a given list of arguments corresponding to a parameter of this template.
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138 *
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139 * @return the argument at index {@code i} in {@code arguments} where {@code parameter == parameters().get(i)}
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140 */
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141 public Argument bindingFor(Parameter parameter, List<Argument> arguments) {
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142 final List< ? extends Parameter> parameters = parameters();
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143 assert arguments.size() == parameters.size();
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144 final int index = Utils.indexOfIdentical(parameters, parameter);
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145 ProgramError.check(index != -1, parameter + " is not a parameter of " + externalName());
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146 return arguments.get(index);
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147 }
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148
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149 public Class[] parameterTypes() {
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150 final Class[] parameterTypes = new Class[parameters().size()];
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151 for (int i = 0; i < parameters().size(); i++) {
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152 parameterTypes[i] = parameters().get(i).type();
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153 }
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154 return parameterTypes;
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155 }
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156
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157 @Override
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158 public Template clone() {
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159 try {
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160 final Template result = (Template) super.clone();
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161 result.instructionDescription = instructionDescription.clone();
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162 return result;
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163 } catch (CloneNotSupportedException cloneNotSupportedException) {
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164 throw ProgramError.unexpected(cloneNotSupportedException);
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165 }
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166 }
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167
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168 public int compareTo(Template other) {
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169 int result = internalName.compareTo(other.internalName);
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170 if (result != 0) {
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171 return result;
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172 }
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173 final List<? extends Parameter> myParameters = parameters();
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174 final List<? extends Parameter> otherParameters = other.parameters();
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175 final int n = Math.min(myParameters.size(), otherParameters.size());
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176 for (int i = 0; i < n; i++) {
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177 result = myParameters.get(i).compareTo(otherParameters.get(i));
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178 if (result != 0) {
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179 return result;
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180 }
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181 }
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182 return new Integer(myParameters.size()).compareTo(otherParameters.size());
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183 }
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184
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185 public final boolean isEquivalentTo(Template other) {
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186 if (this == other) {
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187 return true;
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188 }
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189 Template a = this;
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190 if (a.canonicalRepresentative() != null) {
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191 a = a.canonicalRepresentative();
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192 }
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193 Template b = other;
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194 if (b.canonicalRepresentative() != null) {
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195 b = b.canonicalRepresentative();
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196 }
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197 return a == b;
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198 }
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199 }