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SDL_cpuinfo.h

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00001 /*
00002   Simple DirectMedia Layer
00003   Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
00004 
00005   This software is provided 'as-is', without any express or implied
00006   warranty.  In no event will the authors be held liable for any damages
00007   arising from the use of this software.
00008 
00009   Permission is granted to anyone to use this software for any purpose,
00010   including commercial applications, and to alter it and redistribute it
00011   freely, subject to the following restrictions:
00012 
00013   1. The origin of this software must not be misrepresented; you must not
00014      claim that you wrote the original software. If you use this software
00015      in a product, an acknowledgment in the product documentation would be
00016      appreciated but is not required.
00017   2. Altered source versions must be plainly marked as such, and must not be
00018      misrepresented as being the original software.
00019   3. This notice may not be removed or altered from any source distribution.
00020 */
00021 
00022 /**
00023  *  \file SDL_cpuinfo.h
00024  *
00025  *  CPU feature detection for SDL.
00026  */
00027 
00028 #ifndef _SDL_cpuinfo_h
00029 #define _SDL_cpuinfo_h
00030 
00031 #include "SDL_stdinc.h"
00032 
00033 /* Need to do this here because intrin.h has C++ code in it */
00034 /* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
00035 #if defined(_MSC_VER) && (_MSC_VER >= 1500)
00036 #include <intrin.h>
00037 #ifndef _WIN64
00038 #define __MMX__
00039 #define __3dNOW__
00040 #endif
00041 #define __SSE__
00042 #define __SSE2__
00043 #elif defined(__MINGW64_VERSION_MAJOR)
00044 #include <intrin.h>
00045 #else
00046 #ifdef __ALTIVEC__
00047 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
00048 #include <altivec.h>
00049 #undef pixel
00050 #endif
00051 #endif
00052 #ifdef __MMX__
00053 #include <mmintrin.h>
00054 #endif
00055 #ifdef __3dNOW__
00056 #include <mm3dnow.h>
00057 #endif
00058 #ifdef __SSE__
00059 #include <xmmintrin.h>
00060 #endif
00061 #ifdef __SSE2__
00062 #include <emmintrin.h>
00063 #endif
00064 #endif
00065 
00066 #include "begin_code.h"
00067 /* Set up for C function definitions, even when using C++ */
00068 #ifdef __cplusplus
00069 extern "C" {
00070 #endif
00071 
00072 /* This is a guess for the cacheline size used for padding.
00073  * Most x86 processors have a 64 byte cache line.
00074  * The 64-bit PowerPC processors have a 128 byte cache line.
00075  * We'll use the larger value to be generally safe.
00076  */
00077 #define SDL_CACHELINE_SIZE  128
00078 
00079 /**
00080  *  This function returns the number of CPU cores available.
00081  */
00082 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
00083 
00084 /**
00085  *  This function returns the L1 cache line size of the CPU
00086  *
00087  *  This is useful for determining multi-threaded structure padding
00088  *  or SIMD prefetch sizes.
00089  */
00090 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
00091 
00092 /**
00093  *  This function returns true if the CPU has the RDTSC instruction.
00094  */
00095 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
00096 
00097 /**
00098  *  This function returns true if the CPU has AltiVec features.
00099  */
00100 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
00101 
00102 /**
00103  *  This function returns true if the CPU has MMX features.
00104  */
00105 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
00106 
00107 /**
00108  *  This function returns true if the CPU has 3DNow! features.
00109  */
00110 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
00111 
00112 /**
00113  *  This function returns true if the CPU has SSE features.
00114  */
00115 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
00116 
00117 /**
00118  *  This function returns true if the CPU has SSE2 features.
00119  */
00120 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
00121 
00122 /**
00123  *  This function returns true if the CPU has SSE3 features.
00124  */
00125 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
00126 
00127 /**
00128  *  This function returns true if the CPU has SSE4.1 features.
00129  */
00130 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
00131 
00132 /**
00133  *  This function returns true if the CPU has SSE4.2 features.
00134  */
00135 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
00136 
00137 /**
00138  *  This function returns true if the CPU has AVX features.
00139  */
00140 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
00141 
00142 /**
00143  *  This function returns the amount of RAM configured in the system, in MB.
00144  */
00145 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
00146 
00147 
00148 /* Ends C function definitions when using C++ */
00149 #ifdef __cplusplus
00150 }
00151 #endif
00152 #include "close_code.h"
00153 
00154 #endif /* _SDL_cpuinfo_h */
00155 
00156 /* vi: set ts=4 sw=4 expandtab: */