git.r.bdr.sh - rbdr/super-polarity/blob - vendor/frameworks/SDL2.framework/Versions/A/Headers/SDL_cpuinfo.h

   1 /*
   2   Simple DirectMedia Layer
   3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
   4
   5   This software is provided 'as-is', without any express or implied
   6   warranty.  In no event will the authors be held liable for any damages
   7   arising from the use of this software.
   8
   9   Permission is granted to anyone to use this software for any purpose,
  10   including commercial applications, and to alter it and redistribute it
  11   freely, subject to the following restrictions:
  12
  13   1. The origin of this software must not be misrepresented; you must not
  14      claim that you wrote the original software. If you use this software
  15      in a product, an acknowledgment in the product documentation would be
  16      appreciated but is not required.
  17   2. Altered source versions must be plainly marked as such, and must not be
  18      misrepresented as being the original software.
  19   3. This notice may not be removed or altered from any source distribution.
  20 */
  21
  22 /**
  23  *  \file SDL_cpuinfo.h
  24  *
  25  *  CPU feature detection for SDL.
  26  */
  27
  28 #ifndef _SDL_cpuinfo_h
  29 #define _SDL_cpuinfo_h
  30
  31 #include "SDL_stdinc.h"
  32
  33 /* Need to do this here because intrin.h has C++ code in it */
  34 /* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
  35 #if defined(_MSC_VER) && (_MSC_VER >= 1500)
  36 #include <intrin.h>
  37 #ifndef _WIN64
  38 #define __MMX__
  39 #define __3dNOW__
  40 #endif
  41 #define __SSE__
  42 #define __SSE2__
  43 #elif defined(__MINGW64_VERSION_MAJOR)
  44 #include <intrin.h>
  45 #else
  46 #ifdef __ALTIVEC__
  47 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
  48 #include <altivec.h>
  49 #undef pixel
  50 #endif
  51 #endif
  52 #ifdef __MMX__
  53 #include <mmintrin.h>
  54 #endif
  55 #ifdef __3dNOW__
  56 #include <mm3dnow.h>
  57 #endif
  58 #ifdef __SSE__
  59 #include <xmmintrin.h>
  60 #endif
  61 #ifdef __SSE2__
  62 #include <emmintrin.h>
  63 #endif
  64 #endif
  65
  66 #include "begin_code.h"
  67 /* Set up for C function definitions, even when using C++ */
  68 #ifdef __cplusplus
  69 extern "C" {
  70 #endif
  71
  72 /* This is a guess for the cacheline size used for padding.
  73  * Most x86 processors have a 64 byte cache line.
  74  * The 64-bit PowerPC processors have a 128 byte cache line.
  75  * We'll use the larger value to be generally safe.
  76  */
  77 #define SDL_CACHELINE_SIZE  128
  78
  79 /**
  80  *  This function returns the number of CPU cores available.
  81  */
  82 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
  83
  84 /**
  85  *  This function returns the L1 cache line size of the CPU
  86  *
  87  *  This is useful for determining multi-threaded structure padding
  88  *  or SIMD prefetch sizes.
  89  */
  90 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
  91
  92 /**
  93  *  This function returns true if the CPU has the RDTSC instruction.
  94  */
  95 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
  96
  97 /**
  98  *  This function returns true if the CPU has AltiVec features.
  99  */
 100 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
 101
 102 /**
 103  *  This function returns true if the CPU has MMX features.
 104  */
 105 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
 106
 107 /**
 108  *  This function returns true if the CPU has 3DNow! features.
 109  */
 110 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
 111
 112 /**
 113  *  This function returns true if the CPU has SSE features.
 114  */
 115 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
 116
 117 /**
 118  *  This function returns true if the CPU has SSE2 features.
 119  */
 120 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
 121
 122 /**
 123  *  This function returns true if the CPU has SSE3 features.
 124  */
 125 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
 126
 127 /**
 128  *  This function returns true if the CPU has SSE4.1 features.
 129  */
 130 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
 131
 132 /**
 133  *  This function returns true if the CPU has SSE4.2 features.
 134  */
 135 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
 136
 137
 138 /* Ends C function definitions when using C++ */
 139 #ifdef __cplusplus
 140 }
 141 #endif
 142 #include "close_code.h"
 143
 144 #endif /* _SDL_cpuinfo_h */
 145
 146 /* vi: set ts=4 sw=4 expandtab: */