Mercurial > hg > graal-jvmci-8

annotate graal/com.oracle.max.graal.snippets/src/com/oracle/max/graal/snippets/ArrayCopySnippets.java @ 4249:1aaf3592e516

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix some warnings from findbugs
author Gilles Duboscq <gilles.m.duboscq@gmail.com>
date Mon, 09 Jan 2012 14:05:12 +0100
parents aaac4894175c
children ccbdd90bf356
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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diff changeset
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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diff changeset
218 for (long i = 0; i < length; i++) {
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diff changeset
219 Byte a = UnsafeLoadNode.load(src, i + (srcPos + header), CiKind.Byte);
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diff changeset
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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diff changeset
224 /**
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diff changeset
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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diff changeset
231 */
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diff changeset
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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diff changeset
234 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Short);
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diff changeset
235 for (long i = 0; i < length * 2L; i += 2) {
3733
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diff changeset
236 Character a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Short);
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diff changeset
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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diff changeset
242 public static void copyIntsUp(Object src, long srcOffset, Object dest, long destOffset, int length) {
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diff changeset
243 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Int);
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diff changeset
244 for (long i = 0; i < length * 4L; i += 4) {
3733
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245 Integer a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Int);
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diff changeset
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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diff changeset
250 @Snippet
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diff changeset
251 public static void copyLongsUp(Object src, long srcOffset, Object dest, long destOffset, int length) {
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diff changeset
252 long header = ArrayHeaderSizeNode.sizeFor(CiKind.Long);
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diff changeset
253 for (long i = 0; i < length * 8L; i += 8) {
3733
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diff changeset
254 Long a = UnsafeLoadNode.load(src, i + (srcOffset + header), CiKind.Long);
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diff changeset
255 UnsafeStoreNode.store(dest, i + (destOffset + header), a.longValue(), CiKind.Long);
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256 }
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diff changeset
257 }
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258 }