1 | /* memcpy for the Visium processor. |
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2 | |
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3 | Copyright (c) 2015 Rolls-Royce Controls and Data Services Limited. |
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4 | All rights reserved. |
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5 | |
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6 | Redistribution and use in source and binary forms, with or without |
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7 | modification, are permitted provided that the following conditions are met: |
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8 | |
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9 | * Redistributions of source code must retain the above copyright notice, |
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10 | this list of conditions and the following disclaimer. |
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11 | * Redistributions in binary form must reproduce the above copyright |
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12 | notice, this list of conditions and the following disclaimer in the |
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13 | documentation and/or other materials provided with the distribution. |
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14 | * Neither the name of Rolls-Royce Controls and Data Services Limited nor |
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15 | the names of its contributors may be used to endorse or promote products |
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16 | derived from this software without specific prior written permission. |
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17 | |
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18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
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28 | THE POSSIBILITY OF SUCH DAMAGE. */ |
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29 | |
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30 | /* This file must be kept in sync with libgcc/config/visium/memcpy.c */ |
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31 | |
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32 | #include <stddef.h> |
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33 | #include "memcpy.h" |
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34 | |
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35 | #define INST_BARRIER __asm__ __volatile__ ("":::"memory"); |
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36 | |
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37 | #define MOVE_32_OBJECTS(in,out) \ |
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38 | do { \ |
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39 | INST_BARRIER \ |
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40 | m0 = in [0]; \ |
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41 | m1 = in [1]; \ |
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42 | m2 = in [2]; \ |
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43 | m3 = in [3]; \ |
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44 | out [0] = m0; \ |
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45 | out [1] = m1; \ |
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46 | out [2] = m2; \ |
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47 | out [3] = m3; \ |
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48 | INST_BARRIER \ |
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49 | m0 = in [4]; \ |
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50 | m1 = in [5]; \ |
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51 | m2 = in [6]; \ |
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52 | m3 = in [7]; \ |
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53 | out [4] = m0; \ |
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54 | out [5] = m1; \ |
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55 | out [6] = m2; \ |
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56 | out [7] = m3; \ |
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57 | INST_BARRIER \ |
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58 | m0 = in [8]; \ |
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59 | m1 = in [9]; \ |
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60 | m2 = in [10]; \ |
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61 | m3 = in [11]; \ |
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62 | out [8] = m0; \ |
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63 | out [9] = m1; \ |
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64 | out [10] = m2; \ |
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65 | out [11] = m3; \ |
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66 | INST_BARRIER \ |
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67 | m0 = in [12]; \ |
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68 | m1 = in [13]; \ |
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69 | m2 = in [14]; \ |
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70 | m3 = in [15]; \ |
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71 | out [12] = m0; \ |
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72 | out [13] = m1; \ |
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73 | out [14] = m2; \ |
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74 | out [15] = m3; \ |
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75 | INST_BARRIER \ |
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76 | m0 = in [16]; \ |
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77 | m1 = in [17]; \ |
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78 | m2 = in [18]; \ |
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79 | m3 = in [19]; \ |
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80 | out [16] = m0; \ |
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81 | out [17] = m1; \ |
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82 | out [18] = m2; \ |
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83 | out [19] = m3; \ |
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84 | INST_BARRIER \ |
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85 | m0 = in [20]; \ |
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86 | m1 = in [21]; \ |
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87 | m2 = in [22]; \ |
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88 | m3 = in [23]; \ |
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89 | out [20] = m0; \ |
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90 | out [21] = m1; \ |
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91 | out [22] = m2; \ |
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92 | out [23] = m3; \ |
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93 | INST_BARRIER \ |
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94 | m0 = in [24]; \ |
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95 | m1 = in [25]; \ |
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96 | m2 = in [26]; \ |
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97 | m3 = in [27]; \ |
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98 | out [24] = m0; \ |
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99 | out [25] = m1; \ |
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100 | out [26] = m2; \ |
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101 | out [27] = m3; \ |
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102 | INST_BARRIER \ |
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103 | m0 = in [28]; \ |
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104 | m1 = in [29]; \ |
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105 | m2 = in [30]; \ |
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106 | m3 = in [31]; \ |
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107 | out [28] = m0; \ |
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108 | out [29] = m1; \ |
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109 | out [30] = m2; \ |
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110 | out [31] = m3; \ |
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111 | INST_BARRIER \ |
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112 | in += 32; \ |
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113 | out += 32; \ |
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114 | } while(0) |
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115 | |
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116 | #define MOVE_16_OBJECTS(in,out) \ |
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117 | do { \ |
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118 | INST_BARRIER \ |
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119 | m0 = in [0]; \ |
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120 | m1 = in [1]; \ |
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121 | m2 = in [2]; \ |
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122 | m3 = in [3]; \ |
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123 | out [0] = m0; \ |
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124 | out [1] = m1; \ |
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125 | out [2] = m2; \ |
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126 | out [3] = m3; \ |
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127 | INST_BARRIER \ |
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128 | m0 = in [4]; \ |
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129 | m1 = in [5]; \ |
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130 | m2 = in [6]; \ |
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131 | m3 = in [7]; \ |
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132 | out [4] = m0; \ |
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133 | out [5] = m1; \ |
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134 | out [6] = m2; \ |
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135 | out [7] = m3; \ |
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136 | INST_BARRIER \ |
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137 | m0 = in [8]; \ |
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138 | m1 = in [9]; \ |
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139 | m2 = in [10]; \ |
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140 | m3 = in [11]; \ |
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141 | out [8] = m0; \ |
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142 | out [9] = m1; \ |
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143 | out [10] = m2; \ |
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144 | out [11] = m3; \ |
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145 | INST_BARRIER \ |
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146 | m0 = in [12]; \ |
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147 | m1 = in [13]; \ |
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148 | m2 = in [14]; \ |
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149 | m3 = in [15]; \ |
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150 | out [12] = m0; \ |
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151 | out [13] = m1; \ |
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152 | out [14] = m2; \ |
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153 | out [15] = m3; \ |
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154 | INST_BARRIER \ |
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155 | in += 16; \ |
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156 | out += 16; \ |
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157 | } while(0) |
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158 | |
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159 | #define MOVE_12_OBJECTS(in,out) \ |
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160 | do { \ |
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161 | INST_BARRIER \ |
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162 | m0 = in [0]; \ |
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163 | m1 = in [1]; \ |
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164 | m2 = in [2]; \ |
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165 | m3 = in [3]; \ |
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166 | out [0] = m0; \ |
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167 | out [1] = m1; \ |
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168 | out [2] = m2; \ |
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169 | out [3] = m3; \ |
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170 | INST_BARRIER \ |
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171 | m0 = in [4]; \ |
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172 | m1 = in [5]; \ |
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173 | m2 = in [6]; \ |
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174 | m3 = in [7]; \ |
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175 | out [4] = m0; \ |
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176 | out [5] = m1; \ |
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177 | out [6] = m2; \ |
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178 | out [7] = m3; \ |
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179 | INST_BARRIER \ |
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180 | m0 = in [8]; \ |
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181 | m1 = in [9]; \ |
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182 | m2 = in [10]; \ |
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183 | m3 = in [11]; \ |
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184 | out [8] = m0; \ |
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185 | out [9] = m1; \ |
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186 | out [10] = m2; \ |
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187 | out [11] = m3; \ |
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188 | INST_BARRIER \ |
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189 | in += 12; \ |
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190 | out += 12; \ |
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191 | } while(0) |
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192 | |
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193 | #define MOVE_11_OBJECTS(in,out) \ |
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194 | do { \ |
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195 | INST_BARRIER \ |
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196 | m0 = in [0]; \ |
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197 | m1 = in [1]; \ |
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198 | m2 = in [2]; \ |
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199 | m3 = in [3]; \ |
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200 | out [0] = m0; \ |
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201 | out [1] = m1; \ |
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202 | out [2] = m2; \ |
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203 | out [3] = m3; \ |
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204 | INST_BARRIER \ |
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205 | m0 = in [4]; \ |
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206 | m1 = in [5]; \ |
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207 | m2 = in [6]; \ |
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208 | m3 = in [7]; \ |
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209 | out [4] = m0; \ |
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210 | out [5] = m1; \ |
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211 | out [6] = m2; \ |
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212 | out [7] = m3; \ |
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213 | INST_BARRIER \ |
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214 | m0 = in [8]; \ |
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215 | m1 = in [9]; \ |
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216 | m2 = in [10]; \ |
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217 | out [8] = m0; \ |
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218 | out [9] = m1; \ |
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219 | out [10] = m2; \ |
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220 | INST_BARRIER \ |
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221 | in += 11; \ |
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222 | out += 11; \ |
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223 | } while(0) |
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224 | |
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225 | #define MOVE_10_OBJECTS(in,out) \ |
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226 | do { \ |
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227 | INST_BARRIER \ |
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228 | m0 = in [0]; \ |
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229 | m1 = in [1]; \ |
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230 | m2 = in [2]; \ |
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231 | m3 = in [3]; \ |
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232 | out [0] = m0; \ |
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233 | out [1] = m1; \ |
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234 | out [2] = m2; \ |
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235 | out [3] = m3; \ |
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236 | INST_BARRIER \ |
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237 | m0 = in [4]; \ |
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238 | m1 = in [5]; \ |
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239 | m2 = in [6]; \ |
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240 | m3 = in [7]; \ |
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241 | out [4] = m0; \ |
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242 | m0 = in [8]; \ |
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243 | out [5] = m1; \ |
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244 | m1 = in [9]; \ |
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245 | out [6] = m2; \ |
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246 | out [7] = m3; \ |
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247 | out [8] = m0; \ |
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248 | out [9] = m1; \ |
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249 | INST_BARRIER \ |
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250 | in += 10; \ |
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251 | out += 10; \ |
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252 | } while(0) |
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253 | |
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254 | #define MOVE_9_OBJECTS(in,out) \ |
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255 | do { \ |
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256 | INST_BARRIER \ |
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257 | m0 = in [0]; \ |
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258 | m1 = in [1]; \ |
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259 | m2 = in [2]; \ |
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260 | m3 = in [3]; \ |
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261 | out [0] = m0; \ |
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262 | out [1] = m1; \ |
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263 | out [2] = m2; \ |
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264 | out [3] = m3; \ |
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265 | INST_BARRIER \ |
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266 | m0 = in [4]; \ |
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267 | m1 = in [5]; \ |
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268 | m2 = in [6]; \ |
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269 | m3 = in [7]; \ |
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270 | out [4] = m0; \ |
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271 | out [5] = m1; \ |
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272 | out [6] = m2; \ |
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273 | out [7] = m3; \ |
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274 | INST_BARRIER \ |
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275 | m0 = in [8]; \ |
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276 | out [8] = m0; \ |
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277 | in += 9; \ |
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278 | out += 9; \ |
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279 | } while(0) |
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280 | |
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281 | #define MOVE_8_OBJECTS(in,out) \ |
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282 | do { \ |
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283 | INST_BARRIER \ |
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284 | m0 = in [0]; \ |
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285 | m1 = in [1]; \ |
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286 | m2 = in [2]; \ |
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287 | m3 = in [3]; \ |
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288 | out [0] = m0; \ |
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289 | out [1] = m1; \ |
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290 | out [2] = m2; \ |
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291 | out [3] = m3; \ |
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292 | INST_BARRIER \ |
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293 | m0 = in [4]; \ |
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294 | m1 = in [5]; \ |
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295 | m2 = in [6]; \ |
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296 | m3 = in [7]; \ |
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297 | out [4] = m0; \ |
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298 | out [5] = m1; \ |
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299 | out [6] = m2; \ |
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300 | out [7] = m3; \ |
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301 | INST_BARRIER \ |
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302 | in += 8; \ |
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303 | out += 8; \ |
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304 | } while(0) |
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305 | |
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306 | #define MOVE_7_OBJECTS(in,out) \ |
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307 | do { \ |
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308 | INST_BARRIER \ |
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309 | m0 = in [0]; \ |
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310 | m1 = in [1]; \ |
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311 | m2 = in [2]; \ |
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312 | m3 = in [3]; \ |
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313 | out [0] = m0; \ |
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314 | out [1] = m1; \ |
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315 | out [2] = m2; \ |
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316 | out [3] = m3; \ |
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317 | INST_BARRIER \ |
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318 | m0 = in [4]; \ |
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319 | m1 = in [5]; \ |
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320 | m2 = in [6]; \ |
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321 | out [4] = m0; \ |
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322 | out [5] = m1; \ |
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323 | out [6] = m2; \ |
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324 | INST_BARRIER \ |
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325 | in += 7; \ |
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326 | out += 7; \ |
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327 | } while(0) |
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328 | |
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329 | #define MOVE_6_OBJECTS(in,out) \ |
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330 | do { \ |
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331 | INST_BARRIER \ |
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332 | m0 = in [0]; \ |
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333 | m1 = in [1]; \ |
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334 | m2 = in [2]; \ |
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335 | m3 = in [3]; \ |
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336 | out [0] = m0; \ |
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337 | INST_BARRIER \ |
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338 | m0 = in [4]; \ |
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339 | out [1] = m1; \ |
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340 | INST_BARRIER \ |
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341 | m1 = in [5]; \ |
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342 | out [2] = m2; \ |
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343 | out [3] = m3; \ |
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344 | out [4] = m0; \ |
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345 | out [5] = m1; \ |
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346 | INST_BARRIER \ |
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347 | in += 6; \ |
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348 | out += 6; \ |
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349 | } while(0) |
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350 | |
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351 | #define MOVE_5_OBJECTS(in,out) \ |
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352 | do { \ |
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353 | INST_BARRIER \ |
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354 | m0 = in [0]; \ |
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355 | m1 = in [1]; \ |
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356 | m2 = in [2]; \ |
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357 | m3 = in [3]; \ |
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358 | INST_BARRIER \ |
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359 | out [0] = m0; \ |
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360 | m0 = in [4]; \ |
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361 | INST_BARRIER \ |
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362 | out [1] = m1; \ |
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363 | out [2] = m2; \ |
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364 | out [3] = m3; \ |
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365 | out [4] = m0; \ |
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366 | INST_BARRIER \ |
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367 | in += 5; \ |
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368 | out += 5; \ |
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369 | } while(0) |
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370 | |
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371 | #define MOVE_4_OBJECTS(in,out) \ |
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372 | do { \ |
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373 | INST_BARRIER \ |
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374 | m0 = in [0]; \ |
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375 | m1 = in [1]; \ |
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376 | m2 = in [2]; \ |
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377 | m3 = in [3]; \ |
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378 | out [0] = m0; \ |
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379 | out [1] = m1; \ |
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380 | out [2] = m2; \ |
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381 | out [3] = m3; \ |
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382 | INST_BARRIER \ |
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383 | in += 4; \ |
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384 | out += 4; \ |
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385 | } while(0) |
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386 | |
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387 | #define MOVE_3_OBJECTS(in,out) \ |
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388 | do { \ |
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389 | INST_BARRIER \ |
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390 | m0 = in [0]; \ |
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391 | m1 = in [1]; \ |
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392 | m2 = in [2]; \ |
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393 | out [0] = m0; \ |
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394 | out [1] = m1; \ |
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395 | out [2] = m2; \ |
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396 | INST_BARRIER \ |
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397 | in += 3; \ |
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398 | out += 3; \ |
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399 | } while(0) |
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400 | |
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401 | #define MOVE_2_OBJECTS(in,out) \ |
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402 | do { \ |
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403 | INST_BARRIER \ |
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404 | m0 = in [0]; \ |
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405 | m1 = in [1]; \ |
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406 | out [0] = m0; \ |
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407 | out [1] = m1; \ |
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408 | INST_BARRIER \ |
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409 | in += 2; \ |
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410 | out += 2; \ |
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411 | } while(0) |
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412 | |
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413 | #define MOVE_1_OBJECT(in,out) \ |
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414 | do { \ |
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415 | INST_BARRIER \ |
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416 | m0 = in [0]; \ |
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417 | out [0] = m0; \ |
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418 | INST_BARRIER \ |
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419 | in += 1; \ |
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420 | out += 1; \ |
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421 | } while(0) |
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422 | |
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423 | |
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424 | static inline void |
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425 | __int_memcpy (void *__restrict s1, const void *__restrict s2, size_t n) |
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426 | { |
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427 | int value = n; |
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428 | int loop_var; |
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429 | const int *in = s2; |
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430 | int *out = s1; |
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431 | int count; |
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432 | int m0,m1,m2,m3; |
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433 | |
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434 | /* This code currently give a stall for any value with a 1->2 in the low 5 |
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435 | bits, i.e. 1,2, 33,34 ? not acceptable! */ |
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436 | switch (value & 0x1f) |
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437 | { |
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438 | case 0: |
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439 | break; |
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440 | case 1: |
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441 | MOVE_1_OBJECT (in, out); |
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442 | break; |
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443 | case 2: |
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444 | MOVE_2_OBJECTS (in, out); |
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445 | break; |
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446 | case 3: |
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447 | MOVE_3_OBJECTS (in, out); |
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448 | break; |
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449 | case 4: |
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450 | MOVE_4_OBJECTS (in, out); |
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451 | break; |
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452 | case 5: |
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453 | MOVE_5_OBJECTS (in, out); |
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454 | break; |
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455 | case 6: |
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456 | MOVE_6_OBJECTS (in, out); |
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457 | break; |
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458 | case 7: |
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459 | MOVE_7_OBJECTS (in, out); |
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460 | break; |
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461 | case 8: |
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462 | MOVE_8_OBJECTS (in, out); |
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463 | break; |
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464 | case 9: |
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465 | MOVE_9_OBJECTS (in, out); |
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466 | break; |
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467 | case 10: |
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468 | MOVE_10_OBJECTS (in, out); |
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469 | break; |
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470 | case 11: |
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471 | MOVE_11_OBJECTS (in, out); |
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472 | break; |
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473 | case 12: |
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474 | MOVE_12_OBJECTS (in, out); |
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475 | break; |
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476 | case 13: |
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477 | MOVE_9_OBJECTS (in, out); |
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478 | MOVE_4_OBJECTS (in, out); |
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479 | break; |
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480 | case 14: |
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481 | MOVE_12_OBJECTS (in, out); |
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482 | MOVE_2_OBJECTS (in, out); |
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483 | break; |
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484 | case 15: |
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485 | MOVE_11_OBJECTS (in, out); |
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486 | MOVE_4_OBJECTS (in, out); |
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487 | break; |
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488 | case 16: |
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489 | MOVE_16_OBJECTS (in, out); |
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490 | break; |
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491 | case 17: |
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492 | MOVE_11_OBJECTS (in, out); |
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493 | MOVE_6_OBJECTS (in, out); |
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494 | break; |
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495 | case 18: |
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496 | MOVE_9_OBJECTS (in, out); |
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497 | MOVE_9_OBJECTS (in, out); |
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498 | break; |
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499 | case 19: |
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500 | MOVE_16_OBJECTS (in, out); |
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501 | MOVE_3_OBJECTS (in, out); |
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502 | break; |
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503 | case 20: |
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504 | MOVE_16_OBJECTS (in, out); |
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505 | MOVE_4_OBJECTS (in, out); |
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506 | break; |
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507 | case 21: |
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508 | MOVE_16_OBJECTS (in, out); |
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509 | MOVE_5_OBJECTS (in, out); |
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510 | break; |
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511 | case 22: |
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512 | MOVE_16_OBJECTS (in, out); |
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513 | MOVE_6_OBJECTS (in, out); |
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514 | break; |
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515 | case 23: |
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516 | MOVE_16_OBJECTS (in, out); |
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517 | MOVE_7_OBJECTS (in, out); |
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518 | break; |
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519 | case 24: |
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520 | MOVE_16_OBJECTS (in, out); |
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521 | MOVE_8_OBJECTS (in, out); |
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522 | break; |
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523 | case 25: |
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524 | MOVE_16_OBJECTS (in, out); |
---|
525 | MOVE_9_OBJECTS (in, out); |
---|
526 | break; |
---|
527 | case 26: |
---|
528 | MOVE_16_OBJECTS (in, out); |
---|
529 | MOVE_10_OBJECTS (in, out); |
---|
530 | break; |
---|
531 | case 27: |
---|
532 | MOVE_16_OBJECTS (in, out); |
---|
533 | MOVE_11_OBJECTS (in, out); |
---|
534 | break; |
---|
535 | case 28: |
---|
536 | MOVE_16_OBJECTS (in, out); |
---|
537 | MOVE_8_OBJECTS (in, out); |
---|
538 | MOVE_4_OBJECTS (in, out); |
---|
539 | break; |
---|
540 | case 29: |
---|
541 | MOVE_16_OBJECTS (in, out); |
---|
542 | MOVE_9_OBJECTS (in, out); |
---|
543 | MOVE_4_OBJECTS (in, out); |
---|
544 | break; |
---|
545 | case 30: |
---|
546 | MOVE_16_OBJECTS (in, out); |
---|
547 | MOVE_12_OBJECTS (in, out); |
---|
548 | MOVE_2_OBJECTS (in, out); |
---|
549 | break; |
---|
550 | case 31: |
---|
551 | MOVE_16_OBJECTS (in, out); |
---|
552 | MOVE_11_OBJECTS (in, out); |
---|
553 | MOVE_4_OBJECTS (in, out); |
---|
554 | break; |
---|
555 | } |
---|
556 | |
---|
557 | /* This loop governs the asmptoptic behaviour of this algorithm, for long |
---|
558 | word copies. */ |
---|
559 | count = value >> 5; |
---|
560 | for (loop_var = 0; loop_var < count; loop_var++) |
---|
561 | MOVE_32_OBJECTS (in, out); |
---|
562 | } |
---|
563 | |
---|
564 | static inline void |
---|
565 | __shrt_int_memcpy (void *__restrict s1, const void *__restrict s2, size_t n) |
---|
566 | { |
---|
567 | int value = n; |
---|
568 | int loop_var; |
---|
569 | const short int *in = s2; |
---|
570 | int short *out = s1; |
---|
571 | int count; |
---|
572 | int m0,m1,m2,m3; |
---|
573 | |
---|
574 | /* This code currently give a stall for any value with a 1->2 in the low 5 |
---|
575 | bits, i.e. 1,2, 33,34 ? not acceptable! */ |
---|
576 | switch (value & 0x1f) |
---|
577 | { |
---|
578 | case 0: |
---|
579 | break; |
---|
580 | case 1: |
---|
581 | MOVE_1_OBJECT (in, out); |
---|
582 | break; |
---|
583 | case 2: |
---|
584 | MOVE_2_OBJECTS (in, out); |
---|
585 | break; |
---|
586 | case 3: |
---|
587 | MOVE_3_OBJECTS (in, out); |
---|
588 | break; |
---|
589 | case 4: |
---|
590 | MOVE_4_OBJECTS (in, out); |
---|
591 | break; |
---|
592 | case 5: |
---|
593 | MOVE_5_OBJECTS (in, out); |
---|
594 | break; |
---|
595 | case 6: |
---|
596 | MOVE_6_OBJECTS (in, out); |
---|
597 | break; |
---|
598 | case 7: |
---|
599 | MOVE_7_OBJECTS (in, out); |
---|
600 | break; |
---|
601 | case 8: |
---|
602 | MOVE_8_OBJECTS (in, out); |
---|
603 | break; |
---|
604 | case 9: |
---|
605 | MOVE_9_OBJECTS (in, out); |
---|
606 | break; |
---|
607 | case 10: |
---|
608 | MOVE_10_OBJECTS (in, out); |
---|
609 | break; |
---|
610 | case 11: |
---|
611 | MOVE_11_OBJECTS (in, out); |
---|
612 | break; |
---|
613 | case 12: |
---|
614 | MOVE_12_OBJECTS (in, out); |
---|
615 | break; |
---|
616 | case 13: |
---|
617 | MOVE_9_OBJECTS (in, out); |
---|
618 | MOVE_4_OBJECTS (in, out); |
---|
619 | break; |
---|
620 | case 14: |
---|
621 | MOVE_12_OBJECTS (in, out); |
---|
622 | MOVE_2_OBJECTS (in, out); |
---|
623 | break; |
---|
624 | case 15: |
---|
625 | MOVE_11_OBJECTS (in, out); |
---|
626 | MOVE_4_OBJECTS (in, out); |
---|
627 | break; |
---|
628 | case 16: |
---|
629 | MOVE_16_OBJECTS (in, out); |
---|
630 | break; |
---|
631 | case 17: |
---|
632 | MOVE_11_OBJECTS (in, out); |
---|
633 | MOVE_6_OBJECTS (in, out); |
---|
634 | break; |
---|
635 | case 18: |
---|
636 | MOVE_9_OBJECTS (in, out); |
---|
637 | MOVE_9_OBJECTS (in, out); |
---|
638 | break; |
---|
639 | case 19: |
---|
640 | MOVE_16_OBJECTS (in, out); |
---|
641 | MOVE_3_OBJECTS (in, out); |
---|
642 | break; |
---|
643 | case 20: |
---|
644 | MOVE_16_OBJECTS (in, out); |
---|
645 | MOVE_4_OBJECTS (in, out); |
---|
646 | break; |
---|
647 | case 21: |
---|
648 | MOVE_16_OBJECTS (in, out); |
---|
649 | MOVE_5_OBJECTS (in, out); |
---|
650 | break; |
---|
651 | case 22: |
---|
652 | MOVE_16_OBJECTS (in, out); |
---|
653 | MOVE_6_OBJECTS (in, out); |
---|
654 | break; |
---|
655 | case 23: |
---|
656 | MOVE_16_OBJECTS (in, out); |
---|
657 | MOVE_7_OBJECTS (in, out); |
---|
658 | break; |
---|
659 | case 24: |
---|
660 | MOVE_16_OBJECTS (in, out); |
---|
661 | MOVE_8_OBJECTS (in, out); |
---|
662 | break; |
---|
663 | case 25: |
---|
664 | MOVE_16_OBJECTS (in, out); |
---|
665 | MOVE_9_OBJECTS (in, out); |
---|
666 | break; |
---|
667 | case 26: |
---|
668 | MOVE_16_OBJECTS (in, out); |
---|
669 | MOVE_10_OBJECTS (in, out); |
---|
670 | break; |
---|
671 | case 27: |
---|
672 | MOVE_16_OBJECTS (in, out); |
---|
673 | MOVE_11_OBJECTS (in, out); |
---|
674 | break; |
---|
675 | case 28: |
---|
676 | MOVE_16_OBJECTS (in, out); |
---|
677 | MOVE_8_OBJECTS (in, out); |
---|
678 | MOVE_4_OBJECTS (in, out); |
---|
679 | break; |
---|
680 | case 29: |
---|
681 | MOVE_16_OBJECTS (in, out); |
---|
682 | MOVE_9_OBJECTS (in, out); |
---|
683 | MOVE_4_OBJECTS (in, out); |
---|
684 | break; |
---|
685 | case 30: |
---|
686 | MOVE_16_OBJECTS (in, out); |
---|
687 | MOVE_12_OBJECTS (in, out); |
---|
688 | MOVE_2_OBJECTS (in, out); |
---|
689 | break; |
---|
690 | case 31: |
---|
691 | MOVE_16_OBJECTS (in, out); |
---|
692 | MOVE_11_OBJECTS (in, out); |
---|
693 | MOVE_4_OBJECTS (in, out); |
---|
694 | break; |
---|
695 | } |
---|
696 | |
---|
697 | /* This loop governs the asmptoptic behaviour of this algorithm, for long |
---|
698 | word copies. */ |
---|
699 | count = value >> 5; |
---|
700 | for (loop_var = 0; loop_var < count; loop_var++) |
---|
701 | MOVE_32_OBJECTS (in, out); |
---|
702 | } |
---|
703 | |
---|
704 | |
---|
705 | static inline void |
---|
706 | __byte_memcpy (void *__restrict s1, const void *__restrict s2, size_t n) |
---|
707 | { |
---|
708 | int value = n; |
---|
709 | int loop_var; |
---|
710 | const char *in = s2; |
---|
711 | char *out = s1; |
---|
712 | int count; |
---|
713 | int m0,m1,m2,m3; |
---|
714 | |
---|
715 | /* This code currently give a stall for any value with a 1->2 in the low 5 |
---|
716 | bits, i.e. 1,2, 33,34 ? not acceptable! */ |
---|
717 | switch (value & 0x1f) |
---|
718 | { |
---|
719 | case 0: |
---|
720 | break; |
---|
721 | case 1: |
---|
722 | MOVE_1_OBJECT (in, out); |
---|
723 | break; |
---|
724 | case 2: |
---|
725 | MOVE_2_OBJECTS (in, out); |
---|
726 | break; |
---|
727 | case 3: |
---|
728 | MOVE_3_OBJECTS (in, out); |
---|
729 | break; |
---|
730 | case 4: |
---|
731 | MOVE_4_OBJECTS (in, out); |
---|
732 | break; |
---|
733 | case 5: |
---|
734 | MOVE_5_OBJECTS (in, out); |
---|
735 | break; |
---|
736 | case 6: |
---|
737 | MOVE_6_OBJECTS (in, out); |
---|
738 | break; |
---|
739 | case 7: |
---|
740 | MOVE_7_OBJECTS (in, out); |
---|
741 | break; |
---|
742 | case 8: |
---|
743 | MOVE_8_OBJECTS (in, out); |
---|
744 | break; |
---|
745 | case 9: |
---|
746 | MOVE_9_OBJECTS (in, out); |
---|
747 | break; |
---|
748 | case 10: |
---|
749 | MOVE_10_OBJECTS (in, out); |
---|
750 | break; |
---|
751 | case 11: |
---|
752 | MOVE_11_OBJECTS (in, out); |
---|
753 | break; |
---|
754 | case 12: |
---|
755 | MOVE_12_OBJECTS (in, out); |
---|
756 | break; |
---|
757 | case 13: |
---|
758 | MOVE_9_OBJECTS (in, out); |
---|
759 | MOVE_4_OBJECTS (in, out); |
---|
760 | break; |
---|
761 | case 14: |
---|
762 | MOVE_12_OBJECTS (in, out); |
---|
763 | MOVE_2_OBJECTS (in, out); |
---|
764 | break; |
---|
765 | case 15: |
---|
766 | MOVE_11_OBJECTS (in, out); |
---|
767 | MOVE_4_OBJECTS (in, out); |
---|
768 | break; |
---|
769 | case 16: |
---|
770 | MOVE_16_OBJECTS (in, out); |
---|
771 | break; |
---|
772 | case 17: |
---|
773 | MOVE_11_OBJECTS (in, out); |
---|
774 | MOVE_6_OBJECTS (in, out); |
---|
775 | break; |
---|
776 | case 18: |
---|
777 | MOVE_9_OBJECTS (in, out); |
---|
778 | MOVE_9_OBJECTS (in, out); |
---|
779 | break; |
---|
780 | case 19: |
---|
781 | MOVE_16_OBJECTS (in, out); |
---|
782 | MOVE_3_OBJECTS (in, out); |
---|
783 | break; |
---|
784 | case 20: |
---|
785 | MOVE_16_OBJECTS (in, out); |
---|
786 | MOVE_4_OBJECTS (in, out); |
---|
787 | break; |
---|
788 | case 21: |
---|
789 | MOVE_16_OBJECTS (in, out); |
---|
790 | MOVE_5_OBJECTS (in, out); |
---|
791 | break; |
---|
792 | case 22: |
---|
793 | MOVE_16_OBJECTS (in, out); |
---|
794 | MOVE_6_OBJECTS (in, out); |
---|
795 | break; |
---|
796 | case 23: |
---|
797 | MOVE_16_OBJECTS (in, out); |
---|
798 | MOVE_7_OBJECTS (in, out); |
---|
799 | break; |
---|
800 | case 24: |
---|
801 | MOVE_16_OBJECTS (in, out); |
---|
802 | MOVE_8_OBJECTS (in, out); |
---|
803 | break; |
---|
804 | case 25: |
---|
805 | MOVE_16_OBJECTS (in, out); |
---|
806 | MOVE_9_OBJECTS (in, out); |
---|
807 | break; |
---|
808 | case 26: |
---|
809 | MOVE_16_OBJECTS (in, out); |
---|
810 | MOVE_10_OBJECTS (in, out); |
---|
811 | break; |
---|
812 | case 27: |
---|
813 | MOVE_16_OBJECTS (in, out); |
---|
814 | MOVE_11_OBJECTS (in, out); |
---|
815 | break; |
---|
816 | case 28: |
---|
817 | MOVE_16_OBJECTS (in, out); |
---|
818 | MOVE_8_OBJECTS (in, out); |
---|
819 | MOVE_4_OBJECTS (in, out); |
---|
820 | break; |
---|
821 | case 29: |
---|
822 | MOVE_16_OBJECTS (in, out); |
---|
823 | MOVE_9_OBJECTS (in, out); |
---|
824 | MOVE_4_OBJECTS (in, out); |
---|
825 | break; |
---|
826 | case 30: |
---|
827 | MOVE_16_OBJECTS (in, out); |
---|
828 | MOVE_12_OBJECTS (in, out); |
---|
829 | MOVE_2_OBJECTS (in, out); |
---|
830 | break; |
---|
831 | case 31: |
---|
832 | MOVE_16_OBJECTS (in, out); |
---|
833 | MOVE_11_OBJECTS (in, out); |
---|
834 | MOVE_4_OBJECTS (in, out); |
---|
835 | break; |
---|
836 | } |
---|
837 | |
---|
838 | /* This loop governs the asmptoptic behaviour of this algorithm, for long |
---|
839 | word copies. */ |
---|
840 | count = value >> 5; |
---|
841 | for (loop_var = 0; loop_var < count; loop_var++) |
---|
842 | MOVE_32_OBJECTS (in, out); |
---|
843 | } |
---|
844 | |
---|
845 | |
---|
846 | /* Exposed interface. */ |
---|
847 | |
---|
848 | void * |
---|
849 | memcpy (void *__restrict s1, const void *__restrict s2, size_t n) |
---|
850 | { |
---|
851 | void *result = s1; |
---|
852 | |
---|
853 | /* None of the following handles copying zero bytes. */ |
---|
854 | if (n != 0) |
---|
855 | { |
---|
856 | unsigned test = (unsigned) s2 | (unsigned) s1 | (unsigned) n; |
---|
857 | |
---|
858 | if (test & 1) |
---|
859 | __byte_memcpy (s1, s2, n); |
---|
860 | else if (test & 2) |
---|
861 | __shrt_int_memcpy (s1, s2, n >> 1); |
---|
862 | else |
---|
863 | #ifdef __VISIUM_ARCH_BMI__ |
---|
864 | __asm__ __volatile__ ("bmd %0,%1,%2" |
---|
865 | : "+t" (s1), "+u" (s2), "+v" (n) |
---|
866 | : |
---|
867 | : "r4", "r5", "r6", "memory"); |
---|
868 | #else |
---|
869 | __int_memcpy (s1, s2, n >> 2); |
---|
870 | #endif /* __VISIUM_ARCH_BMI__ */ |
---|
871 | } |
---|
872 | |
---|
873 | return result; |
---|
874 | } |
---|