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annotate src/cpu/ppc/vm/copy_ppc.hpp @ 20693:31d3306aad29 jdk8u40-b18

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Added tag hs25.40-b22 for changeset bc5a90a4db47
author amurillo
date Fri, 05 Dec 2014 09:47:16 -0800
parents 67fa91961822
children
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14408
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1 /*
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2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2013 SAP AG. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef CPU_PPC_VM_COPY_PPC_HPP
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27 #define CPU_PPC_VM_COPY_PPC_HPP
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28
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29 #ifndef PPC64
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30 #error "copy currently only implemented for PPC64"
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31 #endif
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32
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33 // Inline functions for memory copy and fill.
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34
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35 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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36 (void)memmove(to, from, count * HeapWordSize);
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37 }
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38
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39 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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40 switch (count) {
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41 case 8: to[7] = from[7];
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42 case 7: to[6] = from[6];
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43 case 6: to[5] = from[5];
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44 case 5: to[4] = from[4];
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45 case 4: to[3] = from[3];
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46 case 3: to[2] = from[2];
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47 case 2: to[1] = from[1];
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48 case 1: to[0] = from[0];
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49 case 0: break;
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50 default: (void)memcpy(to, from, count * HeapWordSize);
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51 break;
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52 }
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53 }
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54
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55 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
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56 switch (count) {
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57 case 8: to[7] = from[7];
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58 case 7: to[6] = from[6];
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59 case 6: to[5] = from[5];
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60 case 5: to[4] = from[4];
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61 case 4: to[3] = from[3];
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62 case 3: to[2] = from[2];
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63 case 2: to[1] = from[1];
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64 case 1: to[0] = from[0];
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65 case 0: break;
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66 default: while (count-- > 0) {
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67 *to++ = *from++;
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68 }
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69 break;
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70 }
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71 }
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72
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73 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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74 (void)memmove(to, from, count * HeapWordSize);
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75 }
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76
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77 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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78 pd_disjoint_words(from, to, count);
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79 }
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80
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81 static void pd_conjoint_bytes(void* from, void* to, size_t count) {
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82 (void)memmove(to, from, count);
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83 }
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84
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85 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
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86 (void)memmove(to, from, count);
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87 }
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88
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89 // Template for atomic, element-wise copy.
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90 template <class T>
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91 static void copy_conjoint_atomic(T* from, T* to, size_t count) {
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92 if (from > to) {
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93 while (count-- > 0) {
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94 // Copy forwards
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95 *to++ = *from++;
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96 }
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97 } else {
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98 from += count - 1;
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99 to += count - 1;
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100 while (count-- > 0) {
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101 // Copy backwards
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102 *to-- = *from--;
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103 }
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104 }
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105 }
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106
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107 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
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108 // TODO: contribute optimized version.
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109 copy_conjoint_atomic<jshort>(from, to, count);
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110 }
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111
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112 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
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113 // TODO: contribute optimized version.
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114 copy_conjoint_atomic<jint>(from, to, count);
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115 }
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116
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117 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
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118 copy_conjoint_atomic<jlong>(from, to, count);
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119 }
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120
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121 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
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122 copy_conjoint_atomic<oop>(from, to, count);
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123 }
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124
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125 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
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126 pd_conjoint_bytes_atomic(from, to, count);
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127 }
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128
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129 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
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130 // TODO: contribute optimized version.
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131 pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count);
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132 }
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133
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134 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
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135 // TODO: contribute optimized version.
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136 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
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137 }
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138
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139 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
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140 pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
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141 }
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142
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143 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
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144 pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
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145 }
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146
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147 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
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148 julong* to = (julong*)tohw;
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149 julong v = ((julong)value << 32) | value;
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150 while (count-- > 0) {
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151 *to++ = v;
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152 }
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153 }
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154
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155 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
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156 pd_fill_to_words(tohw, count, value);
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157 }
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158
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159 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
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160 (void)memset(to, value, count);
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161 }
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162
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163 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
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164 pd_fill_to_words(tohw, count, 0);
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165 }
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166
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167 static void pd_zero_to_bytes(void* to, size_t count) {
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168 (void)memset(to, 0, count);
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169 }
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170
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171 #endif // CPU_PPC_VM_COPY_PPC_HPP