Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiBitMap.java @ 5329:7ceb3f3671b9
removed XIR support for arraycopy
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 30 Apr 2012 20:40:40 +0200 |
parents | aaac4894175c |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 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.oracle.max.cri.ci; |
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24 |
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25 import java.io.*; |
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26 import java.util.*; |
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27 |
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28 /** |
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29 * Implements a bitmap that stores a single bit for a range of integers (0-n). |
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30 */ |
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31 public final class CiBitMap implements Serializable { |
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32 |
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33 private static final long serialVersionUID = 2471441272241401105L; |
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34 private static final int ADDRESS_BITS_PER_WORD = 6; |
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35 private static final int BITS_PER_WORD = 1 << ADDRESS_BITS_PER_WORD; |
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36 private static final int BIT_INDEX_MASK = BITS_PER_WORD - 1; |
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37 |
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38 public static final int DEFAULT_LENGTH = BITS_PER_WORD; |
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39 |
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40 public static int roundUpLength(int length) { |
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41 return ((length + (BITS_PER_WORD - 1)) >> ADDRESS_BITS_PER_WORD) << ADDRESS_BITS_PER_WORD; |
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42 } |
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43 |
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44 private int size; |
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45 private long low; |
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46 private long[] extra; |
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47 |
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48 /** |
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49 * Constructs a new bit map with the {@linkplain #DEFAULT_LENGTH default length}. |
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50 */ |
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51 public CiBitMap() { |
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52 this(DEFAULT_LENGTH); |
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53 } |
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54 |
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55 /** |
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56 * Constructs a new bit map from a byte array encoded bit map. |
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57 * |
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58 * @param bitmap the bit map to convert |
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59 */ |
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60 public CiBitMap(byte[] bitmap) { |
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61 this(bitmap, 0, bitmap.length); |
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62 } |
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63 |
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64 /** |
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65 * Constructs a copy of the given bit map. |
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66 * |
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67 * @param bitmap the bit map to copy. |
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68 */ |
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69 public CiBitMap(CiBitMap bitmap) { |
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70 this.size = bitmap.size; |
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71 this.low = bitmap.low; |
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72 if (bitmap.extra != null) { |
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73 this.extra = Arrays.copyOf(bitmap.extra, bitmap.extra.length); |
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74 } |
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75 } |
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76 |
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77 /** |
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78 * Constructs a new bit map from a byte array encoded bit map. |
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79 * |
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80 * @param arr the byte array containing the bit map to convert |
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81 * @param off the byte index in {@code arr} at which the bit map starts |
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82 * @param numberOfBytes the number of bytes worth of bits to copy from {@code arr} |
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83 */ |
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84 public CiBitMap(byte[] arr, int off, int numberOfBytes) { |
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85 this(numberOfBytes * 8); |
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86 int byteIndex = off; |
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87 int end = off + numberOfBytes; |
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88 assert end <= arr.length; |
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89 while (byteIndex < end && (byteIndex - off) < 8) { |
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90 long bite = (long) arr[byteIndex] & 0xff; |
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91 low |= bite << ((byteIndex - off) * 8); |
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92 byteIndex++; |
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93 } |
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94 if (byteIndex < end) { |
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95 assert (byteIndex - off) == 8; |
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96 int remBytes = end - byteIndex; |
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97 int remWords = (remBytes + 7) / 8; |
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98 for (int word = 0; word < remWords; word++) { |
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99 long w = 0L; |
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100 for (int i = 0; i < 8 && byteIndex < end; i++) { |
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101 long bite = (long) arr[byteIndex] & 0xff; |
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102 w |= bite << (i * 8); |
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103 byteIndex++; |
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104 } |
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105 extra[word] = w; |
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106 } |
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107 } |
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108 } |
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109 |
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110 /** |
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111 * Converts a {@code long} to a {@link CiBitMap}. |
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112 */ |
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113 public static CiBitMap fromLong(long bitmap) { |
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114 CiBitMap bm = new CiBitMap(64); |
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115 bm.low = bitmap; |
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116 return bm; |
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117 } |
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118 |
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119 /** |
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120 * Constructs a new bit map with the specified length. |
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121 * |
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122 * @param length the length of the bitmap |
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123 */ |
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124 public CiBitMap(int length) { |
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125 assert length >= 0; |
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126 this.size = length; |
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127 if (length > BITS_PER_WORD) { |
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128 extra = new long[length >> ADDRESS_BITS_PER_WORD]; |
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129 } |
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130 } |
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131 |
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132 /** |
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133 * Sets the bit at the specified index. |
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134 * |
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135 * @param i the index of the bit to set |
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136 */ |
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137 public void set(int i) { |
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138 if (checkIndex(i) < BITS_PER_WORD) { |
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139 low |= 1L << i; |
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140 } else { |
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141 int pos = wordIndex(i); |
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142 int index = bitInWord(i); |
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143 extra[pos] |= 1L << index; |
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144 } |
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145 } |
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146 |
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147 /** |
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148 * Grows this bitmap to a new size, appending necessary zero bits. |
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149 * |
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150 * @param newLength the new length of the bitmap |
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151 */ |
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152 public void grow(int newLength) { |
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153 if (newLength > size) { |
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154 // grow this bitmap to the new length |
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155 int newSize = newLength >> ADDRESS_BITS_PER_WORD; |
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156 if (newLength > 0) { |
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157 if (extra == null) { |
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158 // extra just needs to be allocated now |
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159 extra = new long[newSize]; |
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160 } else { |
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161 if (extra.length < newSize) { |
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162 // extra needs to be copied |
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163 long[] newExtra = new long[newSize]; |
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164 for (int i = 0; i < extra.length; i++) { |
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165 newExtra[i] = extra[i]; |
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166 } |
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167 extra = newExtra; |
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168 } else { |
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169 // nothing to do, extra is already the right size |
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170 } |
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171 } |
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172 } |
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173 size = newLength; |
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|
174 } |
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175 } |
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176 |
4142
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177 private static int bitInWord(int i) { |
3733
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178 return i & BIT_INDEX_MASK; |
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179 } |
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180 |
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181 private static int wordIndex(int i) { |
3733
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182 return (i >> ADDRESS_BITS_PER_WORD) - 1; |
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|
183 } |
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184 |
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|
185 /** |
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186 * Clears the bit at the specified index. |
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187 * @param i the index of the bit to clear |
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|
188 */ |
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189 public void clear(int i) { |
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190 if (checkIndex(i) < BITS_PER_WORD) { |
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191 low &= ~(1L << i); |
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192 } else { |
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193 int pos = wordIndex(i); |
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194 int index = bitInWord(i); |
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195 extra[pos] &= ~(1L << index); |
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|
196 } |
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|
197 } |
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198 |
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|
199 /** |
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|
200 * Sets all the bits in this bitmap. |
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|
201 */ |
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diff
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|
202 public void setAll() { |
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diff
changeset
|
203 low = -1; |
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|
204 if (extra != null) { |
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changeset
|
205 for (int i = 0; i < extra.length; i++) { |
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|
206 extra[i] = -1; |
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changeset
|
207 } |
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|
208 } |
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diff
changeset
|
209 } |
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|
210 |
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diff
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|
211 /** |
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|
212 * Clears all the bits in this bitmap. |
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diff
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|
213 */ |
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diff
changeset
|
214 public void clearAll() { |
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diff
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|
215 low = 0; |
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diff
changeset
|
216 if (extra != null) { |
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changeset
|
217 for (int i = 0; i < extra.length; i++) { |
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changeset
|
218 extra[i] = 0; |
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|
219 } |
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|
220 } |
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diff
changeset
|
221 } |
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|
222 |
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|
223 /** |
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|
224 * Gets the value of the bit at the specified index. |
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diff
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|
225 * |
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|
226 * @param i the index of the bit to get |
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|
227 * @return {@code true} if the bit at the specified position is {@code 1} |
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|
228 */ |
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|
229 public boolean get(int i) { |
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|
230 if (checkIndex(i) < BITS_PER_WORD) { |
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diff
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|
231 return ((low >> i) & 1) != 0; |
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diff
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|
232 } |
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diff
changeset
|
233 int pos = wordIndex(i); |
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|
234 int index = bitInWord(i); |
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diff
changeset
|
235 long bits = extra[pos]; |
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diff
changeset
|
236 return ((bits >> index) & 1) != 0; |
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diff
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|
237 } |
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|
238 |
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diff
changeset
|
239 /** |
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|
240 * Gets the value of the bit at the specified index, returning {@code false} if the |
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diff
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|
241 * bitmap does not cover the specified index. |
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diff
changeset
|
242 * |
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|
243 * @param i the index of the bit to get |
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|
244 * @return {@code true} if the bit at the specified position is {@code 1} |
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diff
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|
245 */ |
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parents:
diff
changeset
|
246 public boolean getDefault(int i) { |
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diff
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|
247 if (i < 0 || i >= size) { |
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|
248 return false; |
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parents:
diff
changeset
|
249 } |
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parents:
diff
changeset
|
250 if (i < BITS_PER_WORD) { |
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parents:
diff
changeset
|
251 return ((low >> i) & 1) != 0; |
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252 } |
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253 int pos = wordIndex(i); |
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254 int index = bitInWord(i); |
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255 long bits = extra[pos]; |
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256 return ((bits >> index) & 1) != 0; |
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257 } |
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258 |
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259 /** |
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260 * Performs the union operation on this bitmap with the specified bitmap. That is, all bits set in either of the two |
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261 * bitmaps will be set in this bitmap following this operation. |
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262 * |
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263 * @param other the other bitmap for the union operation |
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264 */ |
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265 public void setUnion(CiBitMap other) { |
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266 low |= other.low; |
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267 if (extra != null && other.extra != null) { |
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268 for (int i = 0; i < extra.length && i < other.extra.length; i++) { |
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269 extra[i] |= other.extra[i]; |
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270 } |
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271 } |
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272 } |
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273 |
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274 /** |
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275 * Performs the union operation on this bitmap with the specified bitmap. That is, a bit is set in this |
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276 * bitmap if and only if it is set in both this bitmap and the specified bitmap. |
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277 * |
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278 * @param other the other bitmap for this operation |
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279 * @return {@code true} if any bits were cleared as a result of this operation |
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280 */ |
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281 public boolean setIntersect(CiBitMap other) { |
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282 boolean same = true; |
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283 long intx = low & other.low; |
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284 if (low != intx) { |
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285 same = false; |
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286 low = intx; |
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287 } |
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288 long[] oxtra = other.extra; |
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289 if (extra != null && oxtra != null) { |
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290 for (int i = 0; i < extra.length; i++) { |
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291 long a = extra[i]; |
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292 if (i < oxtra.length) { |
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293 // zero bits out of this map |
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294 long ax = a & oxtra[i]; |
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295 if (a != ax) { |
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296 same = false; |
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297 extra[i] = ax; |
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298 } |
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299 } else { |
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300 // this bitmap is larger than the specified bitmap; zero remaining bits |
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301 if (a != 0) { |
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302 same = false; |
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303 extra[i] = 0; |
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304 } |
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305 } |
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306 } |
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307 } |
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308 return !same; |
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309 } |
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310 |
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311 /** |
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312 * Gets the number of addressable bits in this bitmap. |
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313 * |
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314 * @return the size of this bitmap |
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315 */ |
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316 public int size() { |
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317 return size; |
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318 } |
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319 |
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320 private int checkIndex(int i) { |
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321 if (i < 0 || i >= size) { |
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322 throw new IndexOutOfBoundsException(); |
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323 } |
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324 return i; |
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325 } |
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326 |
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327 public void setFrom(CiBitMap other) { |
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328 assert this.size == other.size : "must have same size"; |
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329 |
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330 low = other.low; |
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331 if (extra != null) { |
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332 for (int i = 0; i < extra.length; i++) { |
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333 extra[i] = other.extra[i]; |
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334 } |
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|
335 } |
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|
336 } |
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337 |
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338 public void setDifference(CiBitMap other) { |
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339 assert this.size == other.size : "must have same size"; |
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340 |
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341 low &= ~other.low; |
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342 if (extra != null) { |
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343 for (int i = 0; i < extra.length; i++) { |
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344 extra[i] &= ~other.extra[i]; |
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345 } |
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346 } |
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|
347 } |
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348 |
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349 public boolean isSame(CiBitMap other) { |
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350 if (this.size != other.size || this.low != other.low) { |
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351 return false; |
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|
352 } |
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|
353 |
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354 if (extra != null) { |
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|
355 for (int i = 0; i < extra.length; i++) { |
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356 if (extra[i] != other.extra[i]) { |
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357 return false; |
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|
358 } |
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|
359 } |
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|
360 } |
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|
361 |
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|
362 return true; |
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|
363 } |
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|
364 |
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|
365 /** |
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|
366 * Returns the index of the first set bit that occurs on or after a specified start index. |
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367 * If no such bit exists then -1 is returned. |
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|
368 * <p> |
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369 * To iterate over the set bits in a {@code BitMap}, use the following loop: |
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|
370 * |
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|
371 * <pre> |
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|
372 * for (int i = bitMap.nextSetBit(0); i >= 0; i = bitMap.nextSetBit(i + 1)) { |
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|
373 * // operate on index i here |
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|
374 * } |
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|
375 * </pre> |
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|
376 * |
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|
377 * @param fromIndex the index to start checking from (inclusive) |
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|
378 * @return the index of the lowest set bit between {@code [fromIndex .. size())} or -1 if there is no set bit in this range |
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|
379 * @throws IndexOutOfBoundsException if the specified index is negative. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
380 */ |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
381 public int nextSetBit(int fromIndex) { |
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parents:
diff
changeset
|
382 return nextSetBit(fromIndex, size()); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
383 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
384 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
385 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
386 * Returns the index of the first set bit that occurs on or after a specified start index |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
387 * and before a specified end index. If no such bit exists then -1 is returned. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
388 * <p> |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
389 * To iterate over the set bits in a {@code BitMap}, use the following loop: |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
390 * |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
391 * <pre> |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
392 * for (int i = bitMap.nextSetBit(0, bitMap.size()); i >= 0; i = bitMap.nextSetBit(i + 1, bitMap.size())) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
393 * // operate on index i here |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
394 * } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
395 * </pre> |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
396 * |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
397 * @param fromIndex the index to start checking from (inclusive) |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
398 * @param toIndex the index at which to stop checking (exclusive) |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
399 * @return the index of the lowest set bit between {@code [fromIndex .. toIndex)} or -1 if there is no set bit in this range |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
400 * @throws IndexOutOfBoundsException if the specified index is negative. |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
401 */ |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
402 public int nextSetBit(int fromIndex, int toIndex) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
403 assert fromIndex <= size() : "index out of bounds"; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
404 assert toIndex <= size() : "index out of bounds"; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
405 assert fromIndex <= toIndex : "fromIndex > toIndex"; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
406 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
407 if (fromIndex == toIndex) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
408 return -1; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
409 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
410 int fromWordIndex = wordIndex(fromIndex); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
411 int toWordIndex = wordIndex(toIndex - 1) + 1; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
412 int resultIndex = fromIndex; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
413 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
414 // check bits including and to the left_ of offset's position |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
415 int pos = bitInWord(resultIndex); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
416 long res = map(fromWordIndex) >> pos; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
417 if (res != 0) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
418 resultIndex += Long.numberOfTrailingZeros(res); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
419 assert resultIndex >= fromIndex && resultIndex < toIndex : "just checking"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
420 if (resultIndex < toIndex) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
421 return resultIndex; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
422 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
423 return -1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
424 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
425 // skip over all word length 0-bit runs |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
426 for (fromWordIndex++; fromWordIndex < toWordIndex; fromWordIndex++) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
427 res = map(fromWordIndex); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
428 if (res != 0) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
429 // found a 1, return the offset |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
430 resultIndex = bitIndex(fromWordIndex) + Long.numberOfTrailingZeros(res); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
431 assert resultIndex >= fromIndex : "just checking"; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
432 if (resultIndex < toIndex) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
433 return resultIndex; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
434 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
435 return -1; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
436 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
437 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
438 return -1; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
439 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
440 |
4142
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
441 private static int bitIndex(int index) { |
3733
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
442 return (index + 1) << ADDRESS_BITS_PER_WORD; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
443 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
444 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
445 private long map(int index) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
446 if (index == -1) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
447 return low; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
448 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
449 return extra[index]; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
450 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
451 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
452 private static boolean allZeros(int start, long[] arr) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
453 for (int i = start; i < arr.length; i++) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
454 if (arr[i] != 0) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
455 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
456 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
457 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
458 return true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
459 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
460 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
461 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
462 * Compares this object against the specified object. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
463 * The result is {@code true} if and only if {@code obj} is |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
464 * not {@code null} and is a {@code CiBitMap} object that has |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
465 * exactly the same set of bits set to {@code true} as this bit |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
466 * set. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
467 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
468 * @param obj the object to compare with. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
469 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
470 @Override |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
471 public boolean equals(Object obj) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
472 if (obj instanceof CiBitMap) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
473 CiBitMap bm = (CiBitMap) obj; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
474 if (bm.low == low) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
475 if (bm.extra == null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
476 if (extra == null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
477 // Common case |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
478 return true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
479 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
480 return allZeros(0, extra); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
481 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
482 if (extra == null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
483 return allZeros(0, bm.extra); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
484 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
485 // both 'extra' array non null: |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
486 int i = 0; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
487 int length = Math.min(extra.length, bm.extra.length); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
488 while (i < length) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
489 if (extra[i] != bm.extra[i]) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
490 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
491 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
492 i++; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
493 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
494 if (extra.length > bm.extra.length) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
495 return allZeros(length, extra); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
496 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
497 if (extra.length < bm.extra.length) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
498 return allZeros(length, bm.extra); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
499 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
500 return true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
501 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
502 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
503 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
504 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
505 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
506 @Override |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
507 public int hashCode() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
508 return (int) low ^ size; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
509 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
510 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
511 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
512 * Returns a string representation of this bit map |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
513 * that is the same as the string returned by {@link BitSet#toString()} |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
514 * for a bit set with the same bits set as this bit map. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
515 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
516 @Override |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
517 public String toString() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
518 StringBuilder sb = new StringBuilder(size * 2); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
519 sb.append('{'); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
520 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
521 int bit = nextSetBit(0); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
522 if (bit != -1) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
523 sb.append(bit); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
524 for (bit = nextSetBit(bit + 1); bit >= 0; bit = nextSetBit(bit + 1)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
525 sb.append(", ").append(bit); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
526 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
527 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
528 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
529 sb.append('}'); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
530 return sb.toString(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
531 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
532 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
533 public static int highestOneBitIndex(long value) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
534 int bit = Long.numberOfTrailingZeros(Long.highestOneBit(value)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
535 if (bit == 64) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
536 return -1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
537 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
538 return bit; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
539 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
540 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
541 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
542 * Returns the number of bits set to {@code true} in this bit map. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
543 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
544 public int cardinality() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
545 int sum = Long.bitCount(low); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
546 if (extra != null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
547 for (long word : extra) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
548 sum += Long.bitCount(word); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
549 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
550 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
551 return sum; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
552 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
553 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
554 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
555 * Returns the "logical size" of this bit map: the index of |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
556 * the highest set bit in the bit map plus one. Returns zero |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
557 * if the bit map contains no set bits. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
558 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
559 * @return the logical size of this bit map |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
560 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
561 public int length() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
562 if (extra != null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
563 for (int i = extra.length - 1; i >= 0; i--) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
564 if (extra[i] != 0) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
565 return (highestOneBitIndex(extra[i]) + ((i + 1) * 64)) + 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
566 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
567 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
568 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
569 return highestOneBitIndex(low) + 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
570 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
571 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
572 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
573 * Returns a string representation of this bit map with every set bit represented as {@code '1'} |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
574 * and every unset bit represented as {@code '0'}. The first character in the returned string represents |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
575 * bit 0 in this bit map. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
576 * |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
577 * @param length the number of bits represented in the returned string. If {@code length < 0 || length > size()}, |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
578 * then the value of {@link #length()} is used. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
579 */ |
4142
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
580 public String toBinaryString() { |
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
581 int length = length(); |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
582 if (length == 0) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
583 return ""; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
584 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
585 StringBuilder sb = new StringBuilder(length); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
586 for (int i = 0; i < length; ++i) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
587 sb.append(get(i) ? '1' : '0'); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
588 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
589 return sb.toString(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
590 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
591 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
592 static final char[] hexDigits = { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
593 '0', '1', '2', '3', '4', '5', '6', '7', |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
594 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
595 }; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
596 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
597 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
598 * Returns a string representation of this bit map in hex. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
599 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
600 public String toHexString() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
601 if (size == 0) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
602 return ""; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
603 } |
4142
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
604 int hexSize = CiUtil.align(this.size, 4); |
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
605 StringBuilder sb = new StringBuilder(hexSize / 4); |
bc8527f3071c
Adjust code base to new level of warnings.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
3733
diff
changeset
|
606 for (int i = 0; i < hexSize; i += 4) { |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
607 int nibble = get(i) ? 1 : 0; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
608 if (get(i + 1)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
609 nibble |= 2; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
610 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
611 if (get(i + 2)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
612 nibble |= 4; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
613 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
614 if (get(i + 3)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
615 nibble |= 8; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
616 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
617 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
618 sb.append(hexDigits[nibble]); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
619 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
620 return sb.toString(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
621 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
622 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
623 public CiBitMap copy() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
624 CiBitMap n = new CiBitMap(BITS_PER_WORD); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
625 n.low = low; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
626 if (extra != null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
627 n.extra = Arrays.copyOf(extra, extra.length); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
628 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
629 n.size = size; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
630 return n; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
631 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
632 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
633 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
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634 * Copies this bit map into a given byte array. |
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635 * |
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636 * @param arr the destination |
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637 * @param off the byte index in {@code arr} at which to start writing |
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638 * @param numberOfBytes the number of bytes worth of bits to copy from this bit map. |
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639 * The number of bits copied is {@code numberOfBytes * 8}. If {@code numberOfBytes} |
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640 * is -1, then {@code ((size() + 7) / 8)} is used instead. |
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641 * @return the number of bytes written to {@code arr} |
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642 */ |
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643 public int copyTo(byte[] arr, int off, int numberOfBytes) { |
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644 for (int i = 0; i < numberOfBytes; ++i) { |
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645 long word = low; |
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646 int byteInWord; |
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647 if (i >= 8) { |
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648 int wordIndex = (i - 8) / 8; |
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649 word = extra[wordIndex]; |
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650 byteInWord = i & 0x7; |
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651 } else { |
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652 byteInWord = i; |
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653 } |
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654 assert byteInWord < 8; |
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655 byte b = (byte) (word >> (byteInWord * 8)); |
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656 arr[off + i] = b; |
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657 } |
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658 return numberOfBytes; |
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659 } |
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660 |
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661 /** |
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662 * Converts this bit map to a byte array. The length of the returned |
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663 * byte array is {@code ((size() + 7) / 8)}. |
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664 */ |
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665 public byte[] toByteArray() { |
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666 byte[] arr = new byte[(size + 7) / 8]; |
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667 copyTo(arr, 0, arr.length); |
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668 return arr; |
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669 } |
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670 |
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671 /** |
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672 * Converts this bit map to a long. |
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673 * |
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674 * @throws IllegalArgumentException if {@code (size() > 64)} |
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675 */ |
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676 public long toLong() { |
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677 if (size > 64) { |
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678 throw new IllegalArgumentException("bit map of size " + size + " cannot be converted to long"); |
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679 } |
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680 return low; |
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681 } |
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682 } |