Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscAssemblerGenerator.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 static com.sun.max.asm.gen.LabelParameter.*; |
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26 |
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27 import java.util.*; |
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28 |
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29 import com.sun.max.*; |
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30 import com.sun.max.asm.*; |
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31 import com.sun.max.asm.gen.*; |
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32 import com.sun.max.asm.gen.risc.bitRange.*; |
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33 import com.sun.max.asm.gen.risc.field.*; |
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34 import com.sun.max.io.*; |
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35 import com.sun.max.lang.*; |
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36 import com.sun.max.program.*; |
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37 |
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38 /** |
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39 */ |
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40 public abstract class RiscAssemblerGenerator<Template_Type extends RiscTemplate> extends AssemblerGenerator<Template_Type> { |
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41 |
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42 protected RiscAssemblerGenerator(Assembly<Template_Type> assembly) { |
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43 super(assembly, false); |
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44 } |
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45 |
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46 private String encode(OperandField operandField, String val) { |
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47 String value = val; |
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48 // Convert the argument value to the operand value |
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49 if (operandField.zeroes() != 0) { |
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50 value = "(" + value + " >> " + operandField.zeroes() + ")"; |
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51 } |
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52 return operandField.bitRange().encodingString(value, operandField.isSigned(), false); |
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53 } |
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54 |
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55 @Override |
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56 protected int printMethod(IndentWriter writer, Template_Type template) { |
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57 final int startLineCount = writer.lineCount(); |
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58 writer.print("public void "); |
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59 writer.print(template.assemblerMethodName() + "("); |
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60 writer.print(formatParameterList("final ", template.parameters(), false)); |
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61 writer.println(") {"); |
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62 writer.indent(); |
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63 writer.println("int instruction = " + Ints.toHexLiteral(template.opcode()) + ";"); |
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64 |
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65 // Print argument constraint checking statements |
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66 final List<InstructionConstraint> constraints = template.instructionDescription().constraints(); |
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67 for (InstructionConstraint constraint : constraints) { |
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68 if (!(constraint instanceof TestOnlyInstructionConstraint)) { |
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69 final String constraintExpression = constraint.asJavaExpression(); |
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70 writer.println("checkConstraint(" + constraintExpression + ", \"" + constraintExpression + "\");"); |
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71 } |
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72 } |
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73 |
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74 for (OperandField operandField : template.operandFields()) { |
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75 if (operandField instanceof InputOperandField) { |
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76 continue; |
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77 } |
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78 writer.println("instruction |= " + encode(operandField, operandField.valueString()) + ";"); |
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79 } |
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80 |
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81 writer.println("emitInt(instruction);"); |
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82 writer.outdent(); |
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83 writer.println("}"); |
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84 return writer.lineCount() - startLineCount; |
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85 } |
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86 |
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87 @Override |
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88 protected void printLabelMethod(final IndentWriter indentWriter, final Template_Type labelTemplate, String assemblerClassName) { |
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89 final List<Parameter> parameters = getParameters(labelTemplate, true); |
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90 final InstructionWithLabelSubclass labelInstructionSubclass = new InstructionWithLabelSubclass(labelTemplate, InstructionWithOffset.class, ""); |
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91 printLabelMethodHelper(indentWriter, labelTemplate, parameters, 4, assemblerClassName, labelInstructionSubclass); |
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92 } |
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93 |
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94 /** |
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95 * Prints the reference to the raw method from which a synthetic method was defined. |
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96 */ |
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97 @Override |
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98 protected void printExtraMethodJavadoc(IndentWriter writer, Template_Type template, List<String> extraLinks, boolean forLabelAssemblerMethod) { |
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99 if (template.instructionDescription().isSynthetic()) { |
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100 final RiscTemplate syntheticTemplate = template; |
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101 final RiscTemplate rawTemplate = syntheticTemplate.synthesizedFrom(); |
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102 final List<? extends Parameter> parameters = getParameters(rawTemplate, forLabelAssemblerMethod); |
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103 final String ref = rawTemplate.internalName() + "(" + formatParameterList("", parameters, true) + ")"; |
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104 writer.println(" * <p>"); |
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105 writer.print(" * This is a synthetic instruction equivalent to: {@code " + rawTemplate.internalName() + "("); |
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106 extraLinks.add("#" + ref); |
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107 |
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108 boolean firstOperand = true; |
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109 for (OperandField rawOperand : rawTemplate.operandFields()) { |
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110 if (!firstOperand) { |
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111 writer.print(", "); |
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112 } |
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113 writer.print(getRawOperandReplacement(syntheticTemplate, rawTemplate, rawOperand, forLabelAssemblerMethod)); |
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114 firstOperand = false; |
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115 } |
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116 |
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117 writer.println(")}"); |
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118 } |
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119 } |
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120 |
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121 /** |
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122 * Gets the expression in terms of the parameters and opcode of a synthetic instruction that replaces a parameter of |
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123 * the raw instruction from which the synthetic operand was derived. |
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124 * |
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125 * @param syntheticTemplate |
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126 * the synthetic instruction |
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127 * @param rawTemplate |
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128 * the raw instruction from which {@code syntheticTemplate} was derived |
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129 * @param rawOperand |
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130 * a parameter of {@code rawTemplate} |
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131 */ |
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132 private String getRawOperandReplacement(RiscTemplate syntheticTemplate, RiscTemplate rawTemplate, OperandField rawOperand, boolean forLabelAssemblerMethod) { |
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133 if (Utils.indexOfIdentical(syntheticTemplate.operandFields(), rawOperand) != -1) { |
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134 if (rawOperand instanceof OffsetParameter && forLabelAssemblerMethod) { |
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135 return LABEL.variableName(); |
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136 } |
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137 return rawOperand.variableName(); |
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138 } |
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139 |
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140 final int rawOperandMask = rawOperand.bitRange().instructionMask(); |
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141 String expression = null; |
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142 if ((syntheticTemplate.opcodeMask() & rawOperandMask) != 0) { |
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143 // Some or all bits of the raw operand are encoded as part of the synthetic instruction opcode |
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144 final Argument value = rawOperand.disassemble(syntheticTemplate.opcode()); |
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145 assert value != null; |
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146 if (value instanceof SymbolicArgument) { |
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147 expression = ((SymbolicArgument) value).name(); |
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148 } else if (value instanceof Enum) { |
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149 expression = ((Enum) value).name(); |
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150 } else if (value instanceof ImmediateArgument) { |
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151 expression = Long.toString(((ImmediateArgument) value).asLong()); |
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152 } else { |
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153 throw ProgramError.unexpected("unknown type of disassembled value: " + value.getClass().getName()); |
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154 } |
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155 } |
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156 if ((syntheticTemplate.opcodeMask() & rawOperandMask) != rawOperandMask) { |
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157 // Some or all bits of the raw operand are given as a parameter of the synthetic instruction |
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158 for (OperandField syntheticOperand : syntheticTemplate.operandFields()) { |
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159 final int syntheticOperandMask = syntheticOperand.bitRange().instructionMask(); |
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160 if ((syntheticOperandMask & rawOperandMask) != 0) { |
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161 final String term; |
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162 if (syntheticOperand.boundTo() != null) { |
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163 term = syntheticOperand.boundTo().valueString(); |
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164 } else { |
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165 assert (syntheticOperandMask & rawOperandMask) == syntheticOperandMask : |
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166 "cannot handle synthetic parameter that defines bits that are not a subset of bits defined by a raw parameter"; |
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167 final BitRange subFieldRange = syntheticOperand.bitRange().move(false, syntheticOperand.bitRange().numberOfLessSignificantBits()); |
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168 final int shift = syntheticOperand.bitRange().numberOfLessSignificantBits() - rawOperand.bitRange().numberOfLessSignificantBits(); |
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169 final String value = syntheticOperand.variableName(); |
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170 final String assembledSubField = subFieldRange.encodingString(value, syntheticOperand.isSigned(), true); |
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171 if (shift != 0) { |
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172 term = "(" + assembledSubField + " * " + (1 << shift) + ")"; |
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173 } else { |
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174 term = assembledSubField; |
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175 } |
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176 } |
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177 |
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178 if (expression != null && !expression.equals("0")) { |
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179 expression += " | " + term; |
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180 } else { |
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181 expression = term; |
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182 } |
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183 } |
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184 } |
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185 } |
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186 assert expression != null; |
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187 return expression; |
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188 } |
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189 } |