include/SDL_cpuinfo.h
author Sam Lantinga <slouken@libsdl.org>
Sat, 11 Nov 2017 16:20:00 -0800
changeset 11699 afe271f50c70
parent 11698 c5ae532b96d0
child 11762 c4900725a75a
permissions -rw-r--r--
Only include Intel intrinsics header on x86 and x64
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2017 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__)
    55 #include <altivec.h>
    56 #undef pixel
    57 #endif
    58 #endif
    59 #ifdef __3dNOW__
    60 #include <mm3dnow.h>
    61 #endif
    62 #if defined(__i386__) || defined(__x86_64__)
    63 #include <immintrin.h>
    64 #endif
    65 #endif
    66 
    67 #include "begin_code.h"
    68 /* Set up for C function definitions, even when using C++ */
    69 #ifdef __cplusplus
    70 extern "C" {
    71 #endif
    72 
    73 /* This is a guess for the cacheline size used for padding.
    74  * Most x86 processors have a 64 byte cache line.
    75  * The 64-bit PowerPC processors have a 128 byte cache line.
    76  * We'll use the larger value to be generally safe.
    77  */
    78 #define SDL_CACHELINE_SIZE  128
    79 
    80 /**
    81  *  This function returns the number of CPU cores available.
    82  */
    83 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
    84 
    85 /**
    86  *  This function returns the L1 cache line size of the CPU
    87  *
    88  *  This is useful for determining multi-threaded structure padding
    89  *  or SIMD prefetch sizes.
    90  */
    91 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
    92 
    93 /**
    94  *  This function returns true if the CPU has the RDTSC instruction.
    95  */
    96 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
    97 
    98 /**
    99  *  This function returns true if the CPU has AltiVec features.
   100  */
   101 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
   102 
   103 /**
   104  *  This function returns true if the CPU has MMX features.
   105  */
   106 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
   107 
   108 /**
   109  *  This function returns true if the CPU has 3DNow! features.
   110  */
   111 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
   112 
   113 /**
   114  *  This function returns true if the CPU has SSE features.
   115  */
   116 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
   117 
   118 /**
   119  *  This function returns true if the CPU has SSE2 features.
   120  */
   121 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
   122 
   123 /**
   124  *  This function returns true if the CPU has SSE3 features.
   125  */
   126 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
   127 
   128 /**
   129  *  This function returns true if the CPU has SSE4.1 features.
   130  */
   131 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
   132 
   133 /**
   134  *  This function returns true if the CPU has SSE4.2 features.
   135  */
   136 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
   137 
   138 /**
   139  *  This function returns true if the CPU has AVX features.
   140  */
   141 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
   142 
   143 /**
   144  *  This function returns true if the CPU has AVX2 features.
   145  */
   146 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
   147 
   148 /**
   149  *  This function returns true if the CPU has NEON (ARM SIMD) features.
   150  */
   151 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
   152 
   153 /**
   154  *  This function returns the amount of RAM configured in the system, in MB.
   155  */
   156 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
   157 
   158 
   159 /* Ends C function definitions when using C++ */
   160 #ifdef __cplusplus
   161 }
   162 #endif
   163 #include "close_code.h"
   164 
   165 #endif /* SDL_cpuinfo_h_ */
   166 
   167 /* vi: set ts=4 sw=4 expandtab: */