include/SDL_cpuinfo.h
author Marius Gripsgard <marius@ubports.com>
Sat, 13 Jan 2018 01:58:11 +0100
changeset 11826 13d922b387db
parent 11811 5d94cb6b24d3
permissions -rw-r--r--
Mir: Handle close window events
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2018 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) && (defined(_M_IX86) || defined(_M_X64))
    36 #ifdef __clang__
    37 /* Many of the intrinsics SDL uses are not implemented by clang with Visual Studio */
    38 #undef __MMX__
    39 #undef __SSE__
    40 #undef __SSE2__
    41 #else
    42 #include <intrin.h>
    43 #ifndef _WIN64
    44 #define __MMX__
    45 #define __3dNOW__
    46 #endif
    47 #define __SSE__
    48 #define __SSE2__
    49 #endif /* __clang__ */
    50 #elif defined(__MINGW64_VERSION_MAJOR)
    51 #include <intrin.h>
    52 #else
    53 #ifdef __ALTIVEC__
    54 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__) && !defined(SDL_DISABLE_ALTIVEC_H)
    55 #include <altivec.h>
    56 #undef pixel
    57 #undef bool
    58 #endif
    59 #endif
    60 #if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
    61 #include <mm3dnow.h>
    62 #endif
    63 #if HAVE_IMMINTRIN_H && !defined(SDL_DISABLE_IMMINTRIN_H)
    64 #include <immintrin.h>
    65 #else
    66 #if defined(__MMX__) && !defined(SDL_DISABLE_MMINTRIN_H)
    67 #include <mmintrin.h>
    68 #endif
    69 #if defined(__SSE__) && !defined(SDL_DISABLE_XMMINTRIN_H)
    70 #include <xmmintrin.h>
    71 #endif
    72 #if defined(__SSE2__) && !defined(SDL_DISABLE_EMMINTRIN_H)
    73 #include <emmintrin.h>
    74 #endif
    75 #if defined(__SSE3__) && !defined(SDL_DISABLE_PMMINTRIN_H)
    76 #include <pmmintrin.h>
    77 #endif
    78 #endif /* HAVE_IMMINTRIN_H */
    79 #endif /* compiler version */
    80 
    81 #include "begin_code.h"
    82 /* Set up for C function definitions, even when using C++ */
    83 #ifdef __cplusplus
    84 extern "C" {
    85 #endif
    86 
    87 /* This is a guess for the cacheline size used for padding.
    88  * Most x86 processors have a 64 byte cache line.
    89  * The 64-bit PowerPC processors have a 128 byte cache line.
    90  * We'll use the larger value to be generally safe.
    91  */
    92 #define SDL_CACHELINE_SIZE  128
    93 
    94 /**
    95  *  This function returns the number of CPU cores available.
    96  */
    97 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
    98 
    99 /**
   100  *  This function returns the L1 cache line size of the CPU
   101  *
   102  *  This is useful for determining multi-threaded structure padding
   103  *  or SIMD prefetch sizes.
   104  */
   105 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
   106 
   107 /**
   108  *  This function returns true if the CPU has the RDTSC instruction.
   109  */
   110 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
   111 
   112 /**
   113  *  This function returns true if the CPU has AltiVec features.
   114  */
   115 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
   116 
   117 /**
   118  *  This function returns true if the CPU has MMX features.
   119  */
   120 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
   121 
   122 /**
   123  *  This function returns true if the CPU has 3DNow! features.
   124  */
   125 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
   126 
   127 /**
   128  *  This function returns true if the CPU has SSE features.
   129  */
   130 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
   131 
   132 /**
   133  *  This function returns true if the CPU has SSE2 features.
   134  */
   135 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
   136 
   137 /**
   138  *  This function returns true if the CPU has SSE3 features.
   139  */
   140 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
   141 
   142 /**
   143  *  This function returns true if the CPU has SSE4.1 features.
   144  */
   145 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
   146 
   147 /**
   148  *  This function returns true if the CPU has SSE4.2 features.
   149  */
   150 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
   151 
   152 /**
   153  *  This function returns true if the CPU has AVX features.
   154  */
   155 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
   156 
   157 /**
   158  *  This function returns true if the CPU has AVX2 features.
   159  */
   160 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
   161 
   162 /**
   163  *  This function returns true if the CPU has NEON (ARM SIMD) features.
   164  */
   165 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
   166 
   167 /**
   168  *  This function returns the amount of RAM configured in the system, in MB.
   169  */
   170 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
   171 
   172 
   173 /* Ends C function definitions when using C++ */
   174 #ifdef __cplusplus
   175 }
   176 #endif
   177 #include "close_code.h"
   178 
   179 #endif /* SDL_cpuinfo_h_ */
   180 
   181 /* vi: set ts=4 sw=4 expandtab: */