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annotate src/video/SDL_blit_copy.c @ 2250:e1d228456537

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Fixed a few compiler warnings. Added SDL_blit_copy.c to the Visual C++ project The SSE and MMX intrinsics don't compile on Visual Studio yet...
author Sam Lantinga <slouken@libsdl.org>
date Thu, 16 Aug 2007 06:20:51 +0000
parents 5a58b57b6724
children b80e3d57941f
rev   line source
2247
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
2250
e1d228456537 Fixed a few compiler warnings.
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24 #include "SDL_cpuinfo.h"
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25 #include "SDL_video.h"
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26 #include "SDL_blit.h"
2249
5a58b57b6724 Added SSE and MMX optimization for SDL_FillRect()
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27 #include "SDL_blit_copy.h"
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28
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29
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30 #ifdef __MMX__
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31 static __inline__ void
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32 SDL_memcpyMMX(Uint8 * dst, const Uint8 * src, int len)
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33 {
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34 int i;
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35
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36 __m64 values[8];
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37 for (i = len / 64; i--;) {
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38 _mm_prefetch(src, _MM_HINT_NTA);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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39 values[0] = *(__m64 *) (src + 0);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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40 values[1] = *(__m64 *) (src + 8);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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41 values[2] = *(__m64 *) (src + 16);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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42 values[3] = *(__m64 *) (src + 24);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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43 values[4] = *(__m64 *) (src + 32);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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44 values[5] = *(__m64 *) (src + 40);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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45 values[6] = *(__m64 *) (src + 48);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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46 values[7] = *(__m64 *) (src + 56);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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47 _mm_stream_pi((__m64 *) (dst + 0), values[0]);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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48 _mm_stream_pi((__m64 *) (dst + 8), values[1]);
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49 _mm_stream_pi((__m64 *) (dst + 16), values[2]);
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50 _mm_stream_pi((__m64 *) (dst + 24), values[3]);
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51 _mm_stream_pi((__m64 *) (dst + 32), values[4]);
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52 _mm_stream_pi((__m64 *) (dst + 40), values[5]);
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53 _mm_stream_pi((__m64 *) (dst + 48), values[6]);
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54 _mm_stream_pi((__m64 *) (dst + 56), values[7]);
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55 src += 64;
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56 dst += 64;
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57 }
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58
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59 if (len & 63)
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60 SDL_memcpy(dst, src, len & 63);
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61 }
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62 #endif /* __MMX__ */
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63
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64 #ifdef __SSE__
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65 static __inline__ void
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66 SDL_memcpySSE(Uint8 * dst, const Uint8 * src, int len)
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67 {
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68 int i;
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69
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70 __m128 values[4];
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71 for (i = len / 64; i--;) {
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72 _mm_prefetch(src, _MM_HINT_NTA);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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73 values[0] = *(__m128 *) (src + 0);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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74 values[1] = *(__m128 *) (src + 16);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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75 values[2] = *(__m128 *) (src + 32);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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76 values[3] = *(__m128 *) (src + 48);
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77 _mm_stream_ps((float *) (dst + 0), values[0]);
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78 _mm_stream_ps((float *) (dst + 16), values[1]);
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79 _mm_stream_ps((float *) (dst + 32), values[2]);
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80 _mm_stream_ps((float *) (dst + 48), values[3]);
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81 src += 64;
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82 dst += 64;
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83 }
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84
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85 if (len & 63)
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86 SDL_memcpy(dst, src, len & 63);
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87 }
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88 #endif /* __SSE__ */
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89
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90 void
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91 SDL_BlitCopy(SDL_BlitInfo * info)
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92 {
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93 Uint8 *src, *dst;
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94 int w, h;
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95 int srcskip, dstskip;
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96
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97 w = info->d_width * info->dst->BytesPerPixel;
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98 h = info->d_height;
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99 src = info->s_pixels;
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100 dst = info->d_pixels;
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101 srcskip = w + info->s_skip;
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102 dstskip = w + info->d_skip;
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103
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104 #ifdef __SSE__
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105 if (SDL_HasSSE() && !((uintptr_t) src & 15) && !((uintptr_t) dst & 15)) {
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106 while (h--) {
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107 SDL_memcpySSE(dst, src, w);
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108 src += srcskip;
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109 dst += dstskip;
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110 }
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111 return;
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112 }
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113 #endif
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114
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115 #ifdef __MMX__
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116 if (SDL_HasMMX() && !((uintptr_t) src & 7) && !((uintptr_t) dst & 7)) {
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117 while (h--) {
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118 SDL_memcpyMMX(dst, src, w);
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119 src += srcskip;
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120 dst += dstskip;
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121 }
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122 _mm_empty();
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123 return;
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124 }
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125 #endif
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126
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127 while (h--) {
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128 SDL_memcpy(dst, src, w);
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129 src += srcskip;
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130 dst += dstskip;
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131 }
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132 }
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133
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134 void
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135 SDL_BlitCopyOverlap(SDL_BlitInfo * info)
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136 {
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137 Uint8 *src, *dst;
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138 int w, h;
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139 int skip;
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140
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141 w = info->d_width * info->dst->BytesPerPixel;
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142 h = info->d_height;
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143 src = info->s_pixels;
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144 dst = info->d_pixels;
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145 skip = w + info->s_skip;
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5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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146 if ((dst < src) || (dst >= (src + h * skip))) {
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147 SDL_BlitCopy(info);
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148 } else {
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149 src += ((h - 1) * skip);
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150 dst += ((h - 1) * skip);
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151 while (h--) {
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152 SDL_revcpy(dst, src, w);
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153 src -= skip;
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154 dst -= skip;
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155 }
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156 }
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157 }
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158
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159 /* vi: set ts=4 sw=4 expandtab: */