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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/bitRange/CompoundBitRange.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.bitRange;
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24
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25 import java.util.*;
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26
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27 /**
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28 * A range of bits that is composed of several disjoint subranges.
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29 */
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30
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31 public class CompoundBitRange extends BitRange {
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32
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33 public CompoundBitRange() {
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34 super();
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35 }
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36
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37 private List<ContiguousBitRange> contiguousBitRanges = new ArrayList<>();
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38
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39 public List<ContiguousBitRange> contiguousBitRanges() {
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40 return contiguousBitRanges;
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41 }
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42
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43 public void add(ContiguousBitRange contiguousBitRange) {
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44 contiguousBitRanges.add(contiguousBitRange);
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45 }
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46
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47 @Override
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48 public CompoundBitRange move(boolean left, int bits) {
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49 final CompoundBitRange movedRange = new CompoundBitRange();
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50 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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51 movedRange.add((ContiguousBitRange) contiguousBitRange.move(left, bits));
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52 }
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53 return movedRange;
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54 }
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55
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56 @Override
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57 public int width() {
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58 int result = 0;
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59 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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60 result += contiguousBitRange.width();
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61 }
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62 return result;
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63 }
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64
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65 @Override
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66 public int encodedWidth() {
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67 int result = 0;
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68 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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69 result += contiguousBitRange.encodedWidth();
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70 }
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71 return result;
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72 }
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73
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74 @Override
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75 public int instructionMask() {
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76 int mask = 0;
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77 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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78 mask |= contiguousBitRange.instructionMask();
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79 }
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80 return mask;
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81 }
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82
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83 @Override
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84 public int numberOfLessSignificantBits() {
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85 int result = 32;
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86 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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87 final int n = contiguousBitRange.numberOfLessSignificantBits();
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88 if (n < result) {
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89 result = n;
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90 }
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91 }
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92 return result;
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93 }
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94
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95 @Override
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96 public boolean equals(Object other) {
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97 if (!(other instanceof CompoundBitRange)) {
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98 return false;
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99 }
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100 final CompoundBitRange compoundBitRange = (CompoundBitRange) other;
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101 return contiguousBitRanges.equals(compoundBitRange.contiguousBitRanges);
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102 }
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103
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104 @Override
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105 public int hashCode() {
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106 return contiguousBitRanges.hashCode();
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107 }
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108
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109 @Override
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110 public String toString() {
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111 String result = null;
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112 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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113 if (result != null) {
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114 result += "," + contiguousBitRange;
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115 } else {
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116 result = contiguousBitRange.toString();
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117 }
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118 }
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119 return result;
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120 }
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121
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122 /* Extracting */
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123
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124 @Override
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125 public int extractSignedInt(int instruction) {
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126 final Iterator<ContiguousBitRange> iterator = contiguousBitRanges.iterator();
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127 final ContiguousBitRange firstBitRange = iterator.next();
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128 int signedInt = firstBitRange.extractSignedInt(instruction);
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129 while (iterator.hasNext()) {
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130 final ContiguousBitRange contiguousBitRange = iterator.next();
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131 signedInt <<= contiguousBitRange.width();
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132 signedInt |= contiguousBitRange.extractUnsignedInt(instruction);
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133 }
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134 return signedInt;
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135 }
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136
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137 @Override
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138 public int extractUnsignedInt(int instruction) {
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139 int unsignedInt = 0;
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140 for (ContiguousBitRange contiguousBitRange : contiguousBitRanges) {
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141 unsignedInt <<= contiguousBitRange.width();
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142 unsignedInt |= contiguousBitRange.extractUnsignedInt(instruction);
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143 }
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144 return unsignedInt;
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145 }
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146
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147 /* Inserting */
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148
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149 @Override
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150 public int assembleUncheckedSignedInt(int signedInt) throws IndexOutOfBoundsException {
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151 int value = signedInt;
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152 int result = 0;
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153 for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
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154 final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
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155 result |= contiguousBitRange.assembleUncheckedSignedInt(value);
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156 value >>= contiguousBitRange.width();
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157 }
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158 return result;
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159 }
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160
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161 @Override
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162 public int assembleUncheckedUnsignedInt(int unsignedInt) throws IndexOutOfBoundsException {
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163 int value = unsignedInt;
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164 int result = 0;
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165 for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
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166 final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
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167 result |= contiguousBitRange.assembleUncheckedUnsignedInt(value);
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168 value >>>= contiguousBitRange.width();
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169 }
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170 return result;
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171 }
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172
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173 @Override
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174 public String encodingString(String value, boolean signed, boolean checked) {
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175 final StringBuilder sb = new StringBuilder();
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176 int shift = 0;
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177 for (int i = contiguousBitRanges.size() - 1; i >= 0; i--) {
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178 final ContiguousBitRange contiguousBitRange = contiguousBitRanges.get(i);
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179 final String bits = (shift == 0) ? value : "(" + value + (signed ? " >> " : " >>> ") + shift + ")";
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180 final String encoding = contiguousBitRange.encodingString(bits, signed, false);
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181 if (encoding.length() != 0) {
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182 if (sb.length() != 0) {
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183 sb.append(" | ");
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184 }
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185 sb.append(encoding);
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186 }
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187 shift += contiguousBitRange.width();
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188 }
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189 return sb.toString();
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190 }
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191 }