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annotate include/SDL_cpuinfo.h @ 5172:ededa1ccf91c

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Switched the SDL 1.2 compatibility to use the window surface, so it's fast even when there's no hardware acceleration available. This means that the YUV overlay now uses software, but that's okay since fast YUV code should be using the textures now anyway.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 03 Feb 2011 21:13:55 -0800
parents b3f075368b1f
children 6a65c1fc07af
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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
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23 /**
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24 * \file SDL_cpuinfo.h
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25 *
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26 * CPU feature detection for SDL.
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27 */
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28
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29 #ifndef _SDL_cpuinfo_h
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30 #define _SDL_cpuinfo_h
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31
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32 #include "SDL_stdinc.h"
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33
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34 #include "begin_code.h"
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35 /* Set up for C function definitions, even when using C++ */
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36 #ifdef __cplusplus
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37 /* *INDENT-OFF* */
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38 extern "C" {
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39 /* *INDENT-ON* */
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40 #endif
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41
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42 /* This is a guess for the cacheline size used for padding.
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43 * Most x86 processors have a 64 byte cache line.
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44 * The 64-bit PowerPC processors have a 128 byte cache line.
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45 * We'll use the larger value to be generally safe.
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46 */
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47 #define SDL_CACHELINE_SIZE 128
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48
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49 /**
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50 * This function returns the number of CPU cores available.
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51 */
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52 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
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53
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54 /**
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55 * This function returns the L1 cache line size of the CPU
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56 *
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57 * This is useful for determining multi-threaded structure padding
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58 * or SIMD prefetch sizes.
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59 */
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60 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
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61
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62 /**
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63 * This function returns true if the CPU has the RDTSC instruction.
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64 */
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65 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
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66
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67 /**
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68 * This function returns true if the CPU has MMX features.
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69 */
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70 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
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71
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72 /**
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73 * This function returns true if the CPU has MMX Ext.\ features.
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74 */
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75 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMXExt(void);
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76
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77 /**
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78 * This function returns true if the CPU has 3DNow!\ features.
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79 */
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80 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
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81
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82 /**
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83 * This function returns true if the CPU has 3DNow!\ Ext.\ features.
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84 */
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85 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNowExt(void);
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86
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87 /**
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88 * This function returns true if the CPU has SSE features.
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89 */
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90 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
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91
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92 /**
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93 * This function returns true if the CPU has SSE2 features.
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94 */
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95 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
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97 /**
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98 * This function returns true if the CPU has AltiVec features.
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99 */
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100 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
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101
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102 /* Ends C function definitions when using C++ */
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103 #ifdef __cplusplus
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104 /* *INDENT-OFF* */
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105 }
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106 /* *INDENT-ON* */
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107 #endif
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108 #include "close_code.h"
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109
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110 #endif /* _SDL_cpuinfo_h */
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112 /* vi: set ts=4 sw=4 expandtab: */