include/SDL_cpuinfo.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 07 Mar 2011 22:04:10 -0800
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child 5535 96594ac5fd1a
permissions -rw-r--r--
The MMX and 3DNow! instructions can't be compiled by 64-bit Visual Studio.
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/*
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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,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    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
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/**
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 *  \file SDL_cpuinfo.h
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 *  
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 *  CPU feature detection for SDL.
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 */
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#ifndef _SDL_cpuinfo_h
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#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 */
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/* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
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#if defined(_MSC_VER) && (_MSC_VER >= 1500) && !defined(_WIN32_WCE)
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#include <intrin.h>
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#ifndef _WIN64
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#define __MMX__
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#define __3dNOW__
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#endif
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#define __SSE__
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#define __SSE2__
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#elif defined(__MINGW64_VERSION_MAJOR)
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#include <intrin.h>
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#else
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#ifdef __ALTIVEC__
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#if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
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#include <altivec.h>
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#undef pixel
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#endif
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#endif
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#ifdef __MMX__
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#include <mmintrin.h>
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#endif
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#ifdef __3dNOW__
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#include <mm3dnow.h>
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#endif
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#ifdef __SSE__
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#include <xmmintrin.h>
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#endif
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#ifdef __SSE2__
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#include <emmintrin.h>
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#endif
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#endif
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/* This is a guess for the cacheline size used for padding.
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 * Most x86 processors have a 64 byte cache line.
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 * The 64-bit PowerPC processors have a 128 byte cache line.
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 * We'll use the larger value to be generally safe.
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 */
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#define SDL_CACHELINE_SIZE  128
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/**
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 *  This function returns the number of CPU cores available.
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 */
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extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
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/**
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 *  This function returns the L1 cache line size of the CPU
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 *
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 *  This is useful for determining multi-threaded structure padding
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 *  or SIMD prefetch sizes.
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 */
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extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
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/**
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 *  This function returns true if the CPU has the RDTSC instruction.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
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/**
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 *  This function returns true if the CPU has AltiVec features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
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/**
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 *  This function returns true if the CPU has MMX features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
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/**
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 *  This function returns true if the CPU has 3DNow! features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
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/**
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 *  This function returns true if the CPU has SSE features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
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/**
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 *  This function returns true if the CPU has SSE2 features.
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 */
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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.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
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/**
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 *  This function returns true if the CPU has SSE4.1 features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
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/**
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 *  This function returns true if the CPU has SSE4.2 features.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
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#include "close_code.h"
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#endif /* _SDL_cpuinfo_h */
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/* vi: set ts=4 sw=4 expandtab: */