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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscExternalInstruction.java @ 4142:bc8527f3071c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adjust code base to new level of warnings.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 18 Dec 2011 05:24:06 +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.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<>(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<>(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 }