[444] | 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); |
---|
| 494 | break; |
---|
| 495 | case 18: |
---|
| 496 | MOVE_9_OBJECTS (in, out); |
---|
| 497 | MOVE_9_OBJECTS (in, out); |
---|
| 498 | break; |
---|
| 499 | case 19: |
---|
| 500 | MOVE_16_OBJECTS (in, out); |
---|
| 501 | MOVE_3_OBJECTS (in, out); |
---|
| 502 | break; |
---|
| 503 | case 20: |
---|
| 504 | MOVE_16_OBJECTS (in, out); |
---|
| 505 | MOVE_4_OBJECTS (in, out); |
---|
| 506 | break; |
---|
| 507 | case 21: |
---|
| 508 | MOVE_16_OBJECTS (in, out); |
---|
| 509 | MOVE_5_OBJECTS (in, out); |
---|
| 510 | break; |
---|
| 511 | case 22: |
---|
| 512 | MOVE_16_OBJECTS (in, out); |
---|
| 513 | MOVE_6_OBJECTS (in, out); |
---|
| 514 | break; |
---|
| 515 | case 23: |
---|
| 516 | MOVE_16_OBJECTS (in, out); |
---|
| 517 | MOVE_7_OBJECTS (in, out); |
---|
| 518 | break; |
---|
| 519 | case 24: |
---|
| 520 | MOVE_16_OBJECTS (in, out); |
---|
| 521 | MOVE_8_OBJECTS (in, out); |
---|
| 522 | break; |
---|
| 523 | case 25: |
---|
| 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 | } |
---|