Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/InstructionConstraint.java @ 3733:e233f5660da4
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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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 instruction constraint can be specified as part of an {@link InstructionDescription} to specify a constraint on one |
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34 * or more parameters of the assembler method that will be generated from the instruction description. |
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35 * <p> |
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36 * An instruction constraint implements a predicate on a complete assembler instruction and it's used by the |
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37 * {@link AssemblyTester test framework} in concert with {@link Parameter#getLegalTestArguments()} to generate test |
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38 * cases. |
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39 */ |
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40 public interface InstructionConstraint { |
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41 |
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42 /** |
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43 * Determines if a given set of parameter bindings (i.e. arguments) for an assembler method is valid. |
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44 * |
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45 * @param template an instruction template |
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46 * @param arguments the list of arguments to check |
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47 * @return true if the argument list is valid, false otherwise |
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48 */ |
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49 boolean check(Template template, List<Argument> arguments); |
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50 |
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51 /** |
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52 * @return a Java expression that performs the {@link #check check} |
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53 */ |
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54 String asJavaExpression(); |
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55 |
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56 /** |
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57 * Determines if this constraint has {@code parameter} as one of its terms. |
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58 */ |
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59 boolean referencesParameter(Parameter parameter); |
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60 |
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61 /** |
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62 * Gets the method that implements the predicate of the constraint. |
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63 * |
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64 * @return {@code null} if this is a simple expression constraint |
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65 */ |
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66 Method predicateMethod(); |
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67 |
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68 public abstract static class SimpleInstructionConstraint implements InstructionConstraint { |
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69 public Method predicateMethod() { |
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70 return null; |
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71 } |
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72 |
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73 @Override |
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74 public String toString() { |
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75 return asJavaExpression(); |
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76 } |
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77 } |
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78 |
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79 public static final class Static { |
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80 |
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81 private Static() { |
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82 } |
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83 |
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84 /** |
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85 * Creates an instruction constraint on a parameter such that it must be a given symbol. |
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86 */ |
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87 public static InstructionConstraint eq(final Parameter first, final SymbolicArgument symbol) { |
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88 return new SimpleInstructionConstraint() { |
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89 |
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90 public boolean check(Template template, List<Argument> arguments) { |
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91 return template.bindingFor(first, arguments) == symbol; |
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92 } |
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93 |
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94 public String asJavaExpression() { |
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95 return first.variableName() + " == " + symbol.name(); |
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96 } |
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97 |
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98 public boolean referencesParameter(Parameter parameter) { |
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99 return parameter == first; |
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100 } |
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101 }; |
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102 } |
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103 |
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104 /** |
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105 * Creates an instruction constraint between two parameters such that their values cannot be the same. |
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106 */ |
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107 public static InstructionConstraint ne(final Parameter first, final Parameter second) { |
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108 return new SimpleInstructionConstraint() { |
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109 |
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110 public boolean check(Template template, List<Argument> arguments) { |
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111 return template.bindingFor(first, arguments).asLong() != template.bindingFor(second, arguments).asLong(); |
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112 } |
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113 |
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114 public String asJavaExpression() { |
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115 return first.valueString() + " != " + second.valueString(); |
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116 } |
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117 |
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118 public boolean referencesParameter(Parameter parameter) { |
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119 return parameter == first || parameter == second; |
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120 } |
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121 }; |
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122 } |
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123 |
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124 /** |
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125 * Creates an instruction constraint on a parameter such that it must not be a given symbol. |
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126 */ |
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127 public static InstructionConstraint ne(final Parameter first, final SymbolicArgument symbol) { |
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128 return new SimpleInstructionConstraint() { |
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129 |
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130 public boolean check(Template template, List<Argument> arguments) { |
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131 return template.bindingFor(first, arguments) != symbol; |
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132 } |
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133 |
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134 public String asJavaExpression() { |
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135 return first.variableName() + " != " + symbol.name(); |
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136 } |
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137 |
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138 public boolean referencesParameter(Parameter parameter) { |
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139 return parameter == first; |
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140 } |
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141 }; |
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142 } |
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143 |
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144 /** |
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145 * Creates an instruction constraint between two parameters such that the value of the first parameter must be |
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146 * less than the value of the second. |
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147 */ |
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148 public static InstructionConstraint lt(final Parameter first, final Parameter second) { |
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149 return new SimpleInstructionConstraint() { |
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150 |
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151 public boolean check(Template template, List<Argument> arguments) { |
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152 return template.bindingFor(first, arguments).asLong() < template.bindingFor(second, arguments).asLong(); |
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153 } |
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154 |
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155 public String asJavaExpression() { |
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156 return first.valueString() + " < " + second.valueString(); |
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157 } |
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158 |
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159 public boolean referencesParameter(Parameter parameter) { |
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160 return parameter == first || parameter == second; |
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161 } |
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162 |
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163 }; |
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164 } |
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165 |
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166 /** |
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167 * Creates an instruction constraint between two parameters such that the value of the first parameter must be |
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168 * less than or equal to the value of the second. |
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169 */ |
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170 public static InstructionConstraint le(final Parameter first, final Parameter second) { |
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171 return new SimpleInstructionConstraint() { |
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172 |
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173 public boolean check(Template template, List<Argument> arguments) { |
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174 return template.bindingFor(first, arguments).asLong() <= template.bindingFor(second, arguments).asLong(); |
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175 } |
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176 |
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177 public String asJavaExpression() { |
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178 return first.valueString() + " <= " + second.valueString(); |
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179 } |
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180 |
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181 public boolean referencesParameter(Parameter parameter) { |
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182 return parameter == first || parameter == second; |
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183 } |
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184 |
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185 }; |
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186 } |
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187 |
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188 /** |
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189 * Creates an instruction constraint on a given parameter such that its value is greater than a given value. |
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190 */ |
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191 public static InstructionConstraint gt(final Parameter first, final long value) { |
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192 return new SimpleInstructionConstraint() { |
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193 |
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194 public boolean check(Template template, List<Argument> arguments) { |
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195 return template.bindingFor(first, arguments).asLong() > value; |
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196 } |
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197 |
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198 public String asJavaExpression() { |
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199 return first.valueString() + " > " + value; |
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200 } |
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201 |
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202 public boolean referencesParameter(Parameter parameter) { |
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203 return parameter == first; |
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204 } |
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205 |
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206 }; |
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207 } |
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208 |
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209 /** |
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210 * Creates an instruction constraint on a given parameter such that its value is less than a given value. |
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211 */ |
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212 public static InstructionConstraint lt(final Parameter first, final long value) { |
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213 return new SimpleInstructionConstraint() { |
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214 |
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215 public boolean check(Template template, List<Argument> arguments) { |
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216 return template.bindingFor(first, arguments).asLong() < value; |
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217 } |
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218 |
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219 public String asJavaExpression() { |
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220 return first.valueString() + " < " + value; |
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221 } |
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222 |
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223 public boolean referencesParameter(Parameter parameter) { |
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224 return parameter == first; |
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225 } |
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226 |
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227 }; |
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228 } |
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229 |
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230 /** |
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231 * Creates an instruction constraint on a given parameter such that its value must not be equal to a given value. |
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232 */ |
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233 public static InstructionConstraint ne(final Parameter parameter, final long value) { |
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234 return new SimpleInstructionConstraint() { |
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235 |
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236 public boolean check(Template template, List<Argument> arguments) { |
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237 return template.bindingFor(parameter, arguments).asLong() != value; |
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238 } |
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239 |
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240 public String asJavaExpression() { |
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241 return parameter.valueString() + " != " + value; |
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242 } |
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243 |
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244 public boolean referencesParameter(Parameter p) { |
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245 return parameter == p; |
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246 } |
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247 }; |
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248 } |
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249 |
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250 /** |
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251 * Creates an instruction constraint on a given parameter such that its value must be even. |
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252 */ |
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253 public static InstructionConstraint even(final Parameter parameter) { |
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254 return new SimpleInstructionConstraint() { |
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255 |
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256 public boolean check(Template template, List<Argument> arguments) { |
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257 return template.bindingFor(parameter, arguments).asLong() % 2 == 0; |
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258 } |
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259 |
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260 public String asJavaExpression() { |
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261 return "(" + parameter.valueString() + " % 2) == 0"; |
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262 } |
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263 |
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264 public boolean referencesParameter(Parameter p) { |
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265 return parameter == p; |
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266 } |
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267 }; |
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268 } |
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269 |
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270 /** |
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271 * Gets a reference to a Java method that returns a boolean. This is a convenience wrapper for |
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272 * {@link Class#getDeclaredMethod} that converts the checked {@link NoSuchMethodException} into a |
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273 * {@link ProgramError}. |
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274 * |
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275 * The method must have a boolean return type and only accept parameter types corresponding to the unboxed types |
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276 * of a generated assembler method. |
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277 */ |
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278 public static Method getPredicateMethod(Class<?> declaringClass, String methodName, Class... parameterTypes) { |
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279 try { |
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280 return declaringClass.getDeclaredMethod(methodName, parameterTypes); |
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281 } catch (NoSuchMethodException e) { |
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282 throw ProgramError.unexpected("constraint method not found: " + declaringClass + "." + methodName + "(" + Utils.toString(parameterTypes, ", ") + ")"); |
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283 } |
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284 } |
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285 |
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286 /** |
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287 * Creates an instruction constraint implemented by a Java method. |
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288 * |
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289 * @param predicateMethod |
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290 * the constraint checking method which must have a {@code boolean} return type |
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291 * @param parameters |
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292 * the formal parameters of the assembler method whose values are constrained by {@code method}. |
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293 * There must be one element in this list for each formal parameter of {@code method} |
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294 * including one for the receiver if {@code method} is not static. The binding between the two |
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295 * is by position. |
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296 */ |
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297 public static InstructionConstraint makePredicate(final Method predicateMethod, final Parameter... parameters) throws IllegalArgumentException { |
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298 ProgramError.check(predicateMethod.getReturnType() == Boolean.TYPE, "predicate method must return a boolean"); |
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299 final boolean isStatic = Modifier.isStatic(predicateMethod.getModifiers()); |
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300 ProgramError.check(predicateMethod.getParameterTypes().length == (isStatic ? parameters.length : parameters.length - 1), "parameter count != method "); |
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301 return new InstructionConstraint() { |
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302 |
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303 /** |
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304 * @return the method implementing the constraint |
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305 */ |
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306 public Method predicateMethod() { |
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307 return predicateMethod; |
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308 } |
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309 |
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310 /** |
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311 * Determines if the constraint holds for a given set of actual values to a given assembler method. |
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312 * |
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313 * @param template |
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314 * the template from which the assembler method was generated |
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315 * @param arguments |
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316 * the actual values |
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317 * @return true if the constraint held for {@code arguments} |
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318 */ |
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319 public boolean check(Template template, List<Argument> arguments) { |
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320 int parameterIndex; |
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321 final Object receiver; |
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322 final Object[] objects; |
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323 |
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324 if (isStatic) { |
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325 parameterIndex = 0; |
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326 receiver = null; |
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327 objects = new Object[parameters.length]; |
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328 } else { |
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329 parameterIndex = 1; |
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330 objects = new Object[parameters.length - 1]; |
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331 receiver = template.bindingFor(parameters[0], arguments); |
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332 } |
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333 |
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334 for (int i = 0; i != objects.length; ++i, ++parameterIndex) { |
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335 final Parameter parameter = parameters[parameterIndex]; |
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336 final Argument argument = template.bindingFor(parameter, arguments); |
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337 objects[i] = (argument instanceof ImmediateArgument) ? ((ImmediateArgument) argument).boxedJavaValue() : argument; |
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338 } |
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339 |
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340 try { |
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341 return (Boolean) predicateMethod.invoke(receiver, objects); |
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342 } catch (IllegalArgumentException illegalArgumentException) { |
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343 throw ProgramError.unexpected("argument type mismatch", illegalArgumentException); |
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344 } catch (IllegalAccessException illegalAccessException) { |
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345 throw ProgramError.unexpected("illegal access to predicate method unexpected", illegalAccessException); |
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346 } catch (InvocationTargetException invocationTargetException) { |
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347 throw ProgramError.unexpected(invocationTargetException); |
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348 } |
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349 } |
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350 |
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351 /** |
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352 * @return the Java boolean expression that is a call to the constraint method |
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353 */ |
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354 public String asJavaExpression() { |
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355 final StringBuilder buf = new StringBuilder(); |
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356 int i; |
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357 if (isStatic) { |
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358 buf.append(predicateMethod.getDeclaringClass().getSimpleName()); |
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359 i = 0; |
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360 } else { |
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361 buf.append(parameters[0].variableName()); |
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362 i = 1; |
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363 } |
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364 buf.append('.').append(predicateMethod.getName()).append('('); |
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365 while (i < parameters.length) { |
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366 final Parameter parameter = parameters[i]; |
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367 buf.append(parameter.variableName()); |
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368 if (i != parameters.length - 1) { |
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369 buf.append(", "); |
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370 } |
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371 ++i; |
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372 } |
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373 buf.append(')'); |
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374 return buf.toString(); |
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375 } |
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376 |
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377 public boolean referencesParameter(Parameter parameter) { |
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378 return Utils.indexOfIdentical(parameters, parameter) >= 0; |
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379 } |
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380 }; |
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381 } |
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382 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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