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SDL_cpuinfo.h
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
*/
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* \file SDL_cpuinfo.h
*
* CPU feature detection for SDL.
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#ifndef _SDL_cpuinfo_h
#define _SDL_cpuinfo_h
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#include "SDL_stdinc.h"
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/* Need to do this here because intrin.h has C++ code in it */
/* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
#if defined(_MSC_VER) && (_MSC_VER >= 1500) && !defined(_WIN32_WCE)
#include <intrin.h>
#define __MMX__
#define __3dNOW__
#define __SSE__
#define __SSE2__
#elif defined(__MINGW64_VERSION_MAJOR)
#include <intrin.h>
#else
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#ifdef __ALTIVEC__
#if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
#include <altivec.h>
#undef pixel
#endif
#endif
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#ifdef __MMX__
#include <mmintrin.h>
#endif
#ifdef __3dNOW__
#include <mm3dnow.h>
#endif
#ifdef __SSE__
#include <xmmintrin.h>
#endif
#ifdef __SSE2__
#include <emmintrin.h>
#endif
#endif
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#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
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/* *INDENT-OFF* */
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/* *INDENT-ON* */
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/* This is a guess for the cacheline size used for padding.
* Most x86 processors have a 64 byte cache line.
* The 64-bit PowerPC processors have a 128 byte cache line.
* We'll use the larger value to be generally safe.
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#define SDL_CACHELINE_SIZE 128
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/**
* This function returns the number of CPU cores available.
*/
extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
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/**
* This function returns the L1 cache line size of the CPU
*
* This is useful for determining multi-threaded structure padding
* or SIMD prefetch sizes.
*/
extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
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/**
* This function returns true if the CPU has the RDTSC instruction.
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extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
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/**
* This function returns true if the CPU has AltiVec features.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
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/**
* This function returns true if the CPU has MMX features.
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extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
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/**
* This function returns true if the CPU has 3DNow! features.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
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/**
* This function returns true if the CPU has SSE features.
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
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/**
* This function returns true if the CPU has SSE2 features.
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
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/**
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* This function returns true if the CPU has SSE3 features.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
/**
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* This function returns true if the CPU has SSE4.1 features.
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
/**
* This function returns true if the CPU has SSE4.2 features.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
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/* Ends C function definitions when using C++ */
#ifdef __cplusplus
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/* *INDENT-OFF* */
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/* *INDENT-ON* */
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#endif
#include "close_code.h"
#endif /* _SDL_cpuinfo_h */
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/* vi: set ts=4 sw=4 expandtab: */