Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.max.graal.snippets/src/com/oracle/max/graal/snippets/ArrayCopySnippets.java @ 4249:1aaf3592e516
Fix some warnings from findbugs
author | Gilles Duboscq <gilles.m.duboscq@gmail.com> |
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date | Mon, 09 Jan 2012 14:05:12 +0100 |
parents | aaac4894175c |
children | ccbdd90bf356 |
rev | line source |
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1 /* |
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2 * Copyright (c) 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.graal.snippets; |
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24 |
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25 import com.oracle.max.cri.ci.*; |
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26 import com.oracle.max.graal.nodes.extended.*; |
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27 import com.oracle.max.graal.snippets.nodes.*; |
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28 |
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29 |
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30 public class ArrayCopySnippets implements SnippetsInterface{ |
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31 |
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32 @Snippet |
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33 public static void arraycopy(byte[] src, int srcPos, byte[] dest, int destPos, int length) { |
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34 if (src == null || dest == null) { |
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35 throw new NullPointerException(); |
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36 } |
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37 if (srcPos < 0 || destPos < 0 || length < 0 || srcPos + length > src.length || destPos + length > dest.length) { |
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38 throw new IndexOutOfBoundsException(); |
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39 } |
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40 if (src == dest && srcPos < destPos) { // bad aliased case |
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41 if ((length & 0x01) == 0) { |
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42 if ((length & 0x02) == 0) { |
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43 if ((length & 0x04) == 0) { |
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44 copyLongsDown(src, srcPos, dest, destPos, length >> 3); |
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45 } else { |
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46 copyIntsDown(src, srcPos, dest, destPos, length >> 2); |
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47 } |
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48 } else { |
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49 copyShortsDown(src, srcPos, dest, destPos, length >> 1); |
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50 } |
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51 } else { |
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52 copyBytesDown(src, srcPos, dest, destPos, length); |
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53 } |
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54 } else { |
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55 if ((length & 0x01) == 0) { |
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56 if ((length & 0x02) == 0) { |
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57 if ((length & 0x04) == 0) { |
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58 copyLongsUp(src, srcPos, dest, destPos, length >> 3); |
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59 } else { |
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60 copyIntsUp(src, srcPos, dest, destPos, length >> 2); |
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61 } |
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62 } else { |
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63 copyShortsUp(src, srcPos, dest, destPos, length >> 1); |
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64 } |
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65 } else { |
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66 copyBytesUp(src, srcPos, dest, destPos, length); |
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67 } |
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68 } |
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69 } |
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70 |
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71 @Snippet |
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72 public static void arraycopy(char[] src, int srcPos, char[] dest, int destPos, int length) { |
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73 if (src == null || dest == null) { |
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74 throw new NullPointerException(); |
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75 } |
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76 if (srcPos < 0 || destPos < 0 || length < 0 || srcPos + length > src.length || destPos + length > dest.length) { |
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77 throw new IndexOutOfBoundsException(); |
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78 } |
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79 if (src == dest && srcPos < destPos) { // bad aliased case |
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80 if ((length & 0x01) == 0) { |
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81 if ((length & 0x02) == 0) { |
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82 copyLongsDown(src, srcPos * 2L, dest, destPos * 2L, length >> 2); |
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83 } else { |
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84 copyIntsDown(src, srcPos * 2L, dest, destPos * 2L, length >> 1); |
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85 } |
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86 } else { |
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87 copyShortsDown(src, srcPos * 2L, dest, destPos * 2L, length); |
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88 } |
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89 } else { |
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90 if ((length & 0x01) == 0) { |
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91 if ((length & 0x02) == 0) { |
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92 copyLongsUp(src, srcPos * 2L, dest, destPos * 2L, length >> 2); |
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93 } else { |
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94 copyIntsUp(src, srcPos * 2L, dest, destPos * 2L, length >> 1); |
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95 } |
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96 } else { |
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97 copyShortsUp(src, srcPos * 2L, dest, destPos * 2L, length); |
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98 } |
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99 } |
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100 } |
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101 |
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102 @Snippet |
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103 public static void arraycopy(short[] src, int srcPos, short[] dest, int destPos, int length) { |
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104 if (src == null || dest == null) { |
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105 throw new NullPointerException(); |
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106 } |
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107 if (srcPos < 0 || destPos < 0 || length < 0 || srcPos + length > src.length || destPos + length > dest.length) { |
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108 throw new IndexOutOfBoundsException(); |
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109 } |
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110 if (src == dest && srcPos < destPos) { // bad aliased case |
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111 if ((length & 0x01) == 0) { |
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112 if ((length & 0x02) == 0) { |
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113 copyLongsDown(src, srcPos * 2L, dest, destPos * 2L, length >> 2); |
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114 } else { |
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115 copyIntsDown(src, srcPos * 2L, dest, destPos * 2L, length >> 1); |
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116 } |
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117 } else { |
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118 copyShortsDown(src, srcPos * 2L, dest, destPos * 2L, length); |
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119 } |
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120 } else { |
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121 if ((length & 0x01) == 0) { |
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122 if ((length & 0x02) == 0) { |
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123 copyLongsUp(src, srcPos * 2L, dest, destPos * 2L, length >> 2); |
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124 } else { |
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125 copyIntsUp(src, srcPos * 2L, dest, destPos * 2L, length >> 1); |
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126 } |
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127 } else { |
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128 copyShortsUp(src, srcPos * 2L, dest, destPos * 2L, length); |
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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 @Snippet |
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134 public static void arraycopy(int[] src, int srcPos, int[] dest, int destPos, int length) { |
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135 if (src == null || dest == null) { |
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136 throw new NullPointerException(); |
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137 } |
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138 if (srcPos < 0 || destPos < 0 || length < 0 || srcPos + length > src.length || destPos + length > dest.length) { |
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139 throw new IndexOutOfBoundsException(); |
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140 } |
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141 if (src == dest && srcPos < destPos) { // bad aliased case |
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142 if ((length & 0x01) == 0) { |
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143 copyLongsDown(src, srcPos * 4L, dest, destPos * 4L, length >> 1); |
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144 } else { |
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145 copyIntsDown(src, srcPos * 4L, dest, destPos * 4L, length); |
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146 } |
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147 } else { |
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148 if ((length & 0x01) == 0) { |
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149 copyLongsUp(src, srcPos * 4L, dest, destPos * 4L, length >> 1); |
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150 } else { |
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151 copyIntsUp(src, srcPos * 4L, dest, destPos * 4L, length); |
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152 } |
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153 } |
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154 } |
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155 |
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156 @Snippet |
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157 public static void arraycopy(long[] src, int srcPos, long[] dest, int destPos, int length) { |
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158 if (src == null || dest == null) { |
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159 throw new NullPointerException(); |
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160 } |
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161 if (srcPos < 0 || destPos < 0 || length < 0 || srcPos + length > src.length || destPos + length > dest.length) { |
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162 throw new IndexOutOfBoundsException(); |
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163 } |
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164 if (src == dest && srcPos < destPos) { // bad aliased case |
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165 copyLongsDown(src, srcPos * 8L, dest, destPos * 8L, length); |
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166 } else { |
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167 copyLongsUp(src, srcPos * 8L, dest, destPos * 8L, length); |
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168 } |
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169 } |
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170 |
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171 @Snippet |
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172 public static void copyBytesDown(Object src, int srcPos, Object dest, int destPos, int length) { |
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173 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Byte); |
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174 for (long i = length - 1; i >= 0; i--) { |
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175 Byte a = UnsafeLoadNode.load(src, i + (srcPos + header), CiKind.Byte); |
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176 UnsafeStoreNode.store(dest, i + (destPos + header), a.byteValue(), CiKind.Byte); |
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177 } |
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178 } |
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179 |
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180 @Snippet |
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181 public static void copyShortsDown(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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182 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Short); |
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183 for (long i = (length - 1) * 2; i >= 0; i -= 2) { |
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184 Character a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Short); |
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185 UnsafeStoreNode.store(dest, i + (destOffset + header), a.charValue(), CiKind.Short); |
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186 } |
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187 } |
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188 |
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189 @Snippet |
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190 public static void copyIntsDown(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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191 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Short); |
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192 for (long i = (length - 1) * 4; i >= 0; i -= 4) { |
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193 Integer a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Int); |
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194 UnsafeStoreNode.store(dest, i + (destOffset + header), a.intValue(), CiKind.Int); |
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195 } |
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196 } |
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197 |
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|
198 @Snippet |
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199 public static void copyLongsDown(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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200 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Short); |
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201 for (long i = (length - 1) * 8; i >= 0; i -= 8) { |
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202 Long a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Long); |
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203 UnsafeStoreNode.store(dest, i + (destOffset + header), a.longValue(), CiKind.Long); |
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204 } |
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|
205 } |
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|
206 |
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|
207 /** |
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208 * Copies {@code length} bytes from {@code src} starting at {@code srcPos} to {@code dest} starting at {@code destPos}. |
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209 * @param src source object |
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210 * @param srcPos source offset |
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211 * @param dest destination object |
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212 * @param destPos destination offset |
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213 * @param length number of bytes to copy |
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214 */ |
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215 @Snippet |
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216 public static void copyBytesUp(Object src, int srcPos, Object dest, int destPos, int length) { |
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217 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Byte); |
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218 for (long i = 0; i < length; i++) { |
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219 Byte a = UnsafeLoadNode.load(src, i + (srcPos + header), CiKind.Byte); |
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220 UnsafeStoreNode.store(dest, i + (destPos + header), a.byteValue(), CiKind.Byte); |
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|
221 } |
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|
222 } |
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|
223 |
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|
224 /** |
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|
225 * Copies {@code length} shorts from {@code src} starting at offset {@code srcOffset} (in bytes) to {@code dest} starting at offset {@code destOffset} (in bytes). |
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|
226 * @param src |
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227 * @param srcOffset (in bytes) |
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228 * @param dest |
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229 * @param destOffset (in bytes) |
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230 * @param length (in shorts) |
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|
231 */ |
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|
232 @Snippet |
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|
233 public static void copyShortsUp(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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|
234 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Short); |
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|
235 for (long i = 0; i < length * 2L; i += 2) { |
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236 Character a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Short); |
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237 UnsafeStoreNode.store(dest, i + (destOffset + header), a.charValue(), CiKind.Short); |
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238 } |
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239 } |
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240 |
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241 @Snippet |
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242 public static void copyIntsUp(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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243 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Int); |
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244 for (long i = 0; i < length * 4L; i += 4) { |
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245 Integer a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Int); |
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246 UnsafeStoreNode.store(dest, i + (destOffset + header), a.intValue(), CiKind.Int); |
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247 } |
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248 } |
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249 |
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250 @Snippet |
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251 public static void copyLongsUp(Object src, long srcOffset, Object dest, long destOffset, int length) { |
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252 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Long); |
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253 for (long i = 0; i < length * 8L; i += 8) { |
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254 Long a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Long); |
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255 UnsafeStoreNode.store(dest, i + (destOffset + header), a.longValue(), CiKind.Long); |
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256 } |
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257 } |
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258 } |