Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscExternalInstruction.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.asm.*; |
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28 import com.sun.max.asm.dis.*; |
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29 import com.sun.max.asm.gen.*; |
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30 import com.sun.max.asm.gen.risc.field.*; |
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31 import com.sun.max.lang.*; |
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32 |
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33 /** |
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34 * Output of RISC instructions in external assembler format |
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35 * We use exactly the same syntax as Sun's SPARC assembler "as" |
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36 * and GNU's assembler "gas", except for branches to detected labels. |
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37 * In the latter case, the label's name followed by ":" |
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38 * is printed instead of ".". |
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39 * |
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40 * Examples of branch instructions without labels: |
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41 * |
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42 * brz,a . +20 |
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43 * bne . -200 |
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44 * |
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45 * Examples of branch instructions with detected labels: |
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46 * |
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47 * ba L1: +112 |
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48 * be,pt L2: -50 |
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49 */ |
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50 public class RiscExternalInstruction implements RiscInstructionDescriptionVisitor { |
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51 |
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52 protected final RiscTemplate template; |
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53 protected final LinkedList<Argument> arguments; |
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54 protected final ImmediateArgument address; |
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55 protected final AddressMapper addressMapper; |
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56 |
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57 public RiscExternalInstruction(RiscTemplate template, List<Argument> arguments) { |
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58 this.template = template; |
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59 this.arguments = new LinkedList<Argument>(arguments); |
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60 this.address = null; |
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61 this.addressMapper = null; |
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62 } |
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63 |
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64 public RiscExternalInstruction(RiscTemplate template, List<Argument> arguments, ImmediateArgument address, AddressMapper addressMapper) { |
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65 this.template = template; |
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66 this.arguments = new LinkedList<Argument>(arguments); |
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67 this.address = address; |
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68 this.addressMapper = addressMapper; |
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69 } |
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70 |
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71 private String nameString; |
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72 |
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73 public String name() { |
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74 if (nameString == null) { |
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75 nameString = template.externalName(); |
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76 for (Argument argument : arguments) { |
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77 if (argument instanceof ExternalMnemonicSuffixArgument) { |
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78 final String suffix = argument.externalValue(); |
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79 nameString += suffix; |
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80 } |
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81 } |
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82 } |
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83 return nameString; |
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84 } |
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85 |
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86 private String operandsString; |
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87 |
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88 public String operands() { |
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89 if (operandsString == null) { |
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90 operandsString = ""; |
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91 RiscInstructionDescriptionVisitor.Static.visitInstructionDescription(this, template.instructionDescription()); |
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92 } |
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93 return operandsString; |
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94 } |
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95 |
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96 @Override |
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97 public String toString() { |
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98 return Strings.padLengthWithSpaces(name(), 10) + " " + operands(); |
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99 } |
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100 |
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101 private void print(String s) { |
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102 operandsString += s; |
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103 } |
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104 |
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105 private void printBranchDisplacement(ImmediateArgument immediateArgument) { |
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106 final int delta = (int) immediateArgument.asLong(); |
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107 if (address != null) { |
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108 final ImmediateArgument targetAddress = address.plus(delta); |
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109 final DisassembledLabel label = addressMapper.labelAt(targetAddress); |
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110 if (label != null) { |
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111 print(label.name() + ": "); |
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112 } |
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113 } else { |
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114 // (tw) No longer checked for absolute branch, always print "." |
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115 print(". "); |
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116 } |
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117 if (delta >= 0) { |
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118 print("+"); |
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119 } |
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120 print(Integer.toString(delta)); |
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121 } |
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122 |
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123 private Object previousSpecification; |
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124 |
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125 public void visitField(RiscField field) { |
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126 if (field instanceof OperandField) { |
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127 final OperandField operandField = (OperandField) field; |
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128 if (operandField.boundTo() != null) { |
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129 return; |
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130 } |
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131 final Argument argument = arguments.remove(); |
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132 if (argument instanceof ExternalMnemonicSuffixArgument) { |
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133 return; |
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134 } |
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135 if (previousSpecification != null && !(previousSpecification instanceof String)) { |
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136 print(", "); |
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137 } |
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138 if (argument instanceof ImmediateArgument) { |
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139 final ImmediateArgument immediateArgument = (ImmediateArgument) argument; |
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140 if (field instanceof BranchDisplacementOperandField) { |
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141 printBranchDisplacement(immediateArgument); |
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142 } else { |
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143 if (operandField.isSigned()) { |
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144 print(immediateArgument.signedExternalValue()); |
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145 } else { |
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146 print(immediateArgument.externalValue()); |
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147 } |
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148 } |
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149 } else { |
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150 print(argument.externalValue()); |
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151 } |
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152 previousSpecification = field; |
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153 } |
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154 } |
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155 |
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156 public void visitConstant(RiscConstant constant) { |
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157 } |
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158 |
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159 private boolean writingStrings; |
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160 |
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161 public void visitString(String string) { |
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162 if (writingStrings) { |
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163 print(string); |
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164 previousSpecification = string; |
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165 } |
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166 writingStrings = true; |
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167 } |
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168 |
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169 public void visitConstraint(InstructionConstraint constraint) { |
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170 } |
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171 |
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172 } |