annotate src/video/SDL_blit_copy.c @ 2247:93994f65c74c

Removed hermes since it's LGPL and not compatible with a commercial license. Prepping for using MMX and SSE intrinsics instead of inline assembly. .. except for memcpy equivalents which only get faster if they can exploit the parallelism of loading into multiple SIMD registers. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Aug 2007 08:21:10 +0000
parents
children 5cd2a2293cf0
rev   line source
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
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1 /*
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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2 SDL - Simple DirectMedia Layer
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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3 Copyright (C) 1997-2006 Sam Lantinga
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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4
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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5 This library is free software; you can redistribute it and/or
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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6 modify it under the terms of the GNU Lesser General Public
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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7 License as published by the Free Software Foundation; either
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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8 version 2.1 of the License, or (at your option) any later version.
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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9
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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10 This library is distributed in the hope that it will be useful,
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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13 Lesser General Public License for more details.
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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14
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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15 You should have received a copy of the GNU Lesser General Public
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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16 License along with this library; if not, write to the Free Software
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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18
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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19 Sam Lantinga
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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20 slouken@libsdl.org
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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21 */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_blit.h"
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26
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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27 /* The MMX/SSE intrinsics don't give access to specific registers for
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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28 the most memory parallelism, so we'll use GCC inline assembly here...
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29 */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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30 #ifndef __GNUC__
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31 #undef __MMX__
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32 #undef __SSE__
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33 #endif
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34
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35 #ifdef __MMX__
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36 static __inline__ void
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37 SDL_memcpyMMX(Uint8 *dst, const Uint8 *src, int len)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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38 {
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39 int i;
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40
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41 for (i = len / 64; i--;) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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42 __asm__ __volatile__ (
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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43 "prefetchnta (%0)\n"
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44 "movq (%0), %%mm0\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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45 "movq 8(%0), %%mm1\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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46 "movq 16(%0), %%mm2\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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47 "movq 24(%0), %%mm3\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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48 "movq 32(%0), %%mm4\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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49 "movq 40(%0), %%mm5\n"
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50 "movq 48(%0), %%mm6\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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51 "movq 56(%0), %%mm7\n"
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52 "movntq %%mm0, (%1)\n"
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53 "movntq %%mm1, 8(%1)\n"
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54 "movntq %%mm2, 16(%1)\n"
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55 "movntq %%mm3, 24(%1)\n"
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56 "movntq %%mm4, 32(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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57 "movntq %%mm5, 40(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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58 "movntq %%mm6, 48(%1)\n"
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59 "movntq %%mm7, 56(%1)\n"
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60 :: "r" (src), "r" (dst) : "memory");
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61 src += 64;
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62 dst += 64;
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63 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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64 if (len & 63)
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65 SDL_memcpy(dst, src, len & 63);
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66 }
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67 #endif /* __MMX__ */
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68
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69 #ifdef __SSE__
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70 static __inline__ void
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71 SDL_memcpySSE(Uint8 *dst, const Uint8 *src, int len)
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72 {
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73 int i;
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74
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75 for (i = len / 64; i--;) {
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76 __asm__ __volatile__ (
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77 "prefetchnta (%0)\n"
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78 "movaps (%0), %%xmm0\n"
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79 "movaps 16(%0), %%xmm1\n"
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80 "movaps 32(%0), %%xmm2\n"
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81 "movaps 48(%0), %%xmm3\n"
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82 "movntps %%xmm0, (%1)\n"
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83 "movntps %%xmm1, 16(%1)\n"
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84 "movntps %%xmm2, 32(%1)\n"
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85 "movntps %%xmm3, 48(%1)\n"
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86 :: "r" (src), "r" (dst) : "memory");
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87 src += 64;
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88 dst += 64;
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89 }
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90 if (len & 63)
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91 SDL_memcpy(dst, src, len & 63);
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92 }
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93 #endif /* __SSE__ */
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94
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95 void
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96 SDL_BlitCopy(SDL_BlitInfo * info)
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97 {
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98 Uint8 *src, *dst;
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99 int w, h;
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100 int srcskip, dstskip;
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101
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102 w = info->d_width * info->dst->BytesPerPixel;
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103 h = info->d_height;
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104 src = info->s_pixels;
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105 dst = info->d_pixels;
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106 srcskip = w + info->s_skip;
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107 dstskip = w + info->d_skip;
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108
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109 #ifdef __SSE__
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110 if (SDL_HasSSE() && !((uintptr_t)src & 15) && !((uintptr_t)dst & 15)) {
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111 while (h--) {
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112 SDL_memcpySSE(dst, src, w);
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113 src += srcskip;
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114 dst += dstskip;
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115 }
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116 return;
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117 }
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118 #endif
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119
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120 #ifdef __MMX__
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121 if (SDL_HasMMX() && !((uintptr_t)src & 7) && !((uintptr_t)dst & 7)) {
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122 while (h--) {
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123 SDL_memcpyMMX(dst, src, w);
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124 src += srcskip;
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125 dst += dstskip;
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126 }
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127 __asm__ __volatile__(" emms\n"::);
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128 return;
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129 }
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130 #endif
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131
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132 while (h--) {
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133 SDL_memcpy(dst, src, w);
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134 src += srcskip;
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135 dst += dstskip;
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136 }
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137 }
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138
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139 void
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140 SDL_BlitCopyOverlap(SDL_BlitInfo * info)
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141 {
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142 Uint8 *src, *dst;
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143 int w, h;
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144 int skip;
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145
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146 w = info->d_width * info->dst->BytesPerPixel;
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147 h = info->d_height;
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148 src = info->s_pixels;
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149 dst = info->d_pixels;
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150 skip = w + info->s_skip;
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151 if ((dst < src) || (dst >= (src + h*skip))) {
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152 SDL_BlitCopy(info);
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153 } else {
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154 src += ((h - 1) * skip);
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155 dst += ((h - 1) * skip);
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156 while (h--) {
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157 SDL_revcpy(dst, src, w);
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158 src -= skip;
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159 dst -= skip;
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160 }
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161 }
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162 }
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163
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164 /* vi: set ts=4 sw=4 expandtab: */