include/SDL_cpuinfo.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 11 Dec 2017 12:00:12 -0800
changeset 11762 c4900725a75a
parent 11699 afe271f50c70
child 11770 58a69c196061
permissions -rw-r--r--
Check for immintrin.h before using it in SDL_cpuinfo.h
     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 HAVE_IMMINTRIN_H
    63 #include <immintrin.h>
    64 #else
    65 #ifdef __MMX__
    66 #include <mmintrin.h>
    67 #endif
    68 #ifdef __3dNOW__
    69 #include <mm3dnow.h>
    70 #endif
    71 #ifdef __SSE__
    72 #include <xmmintrin.h>
    73 #endif
    74 #ifdef __SSE2__
    75 #include <emmintrin.h>
    76 #endif
    77 #ifdef __SSE3__
    78 #include <pmmintrin.h>
    79 #endif
    80 #endif /* HAVE_IMMINTRIN_H */
    81 #endif /* compiler version */
    82 
    83 #include "begin_code.h"
    84 /* Set up for C function definitions, even when using C++ */
    85 #ifdef __cplusplus
    86 extern "C" {
    87 #endif
    88 
    89 /* This is a guess for the cacheline size used for padding.
    90  * Most x86 processors have a 64 byte cache line.
    91  * The 64-bit PowerPC processors have a 128 byte cache line.
    92  * We'll use the larger value to be generally safe.
    93  */
    94 #define SDL_CACHELINE_SIZE  128
    95 
    96 /**
    97  *  This function returns the number of CPU cores available.
    98  */
    99 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
   100 
   101 /**
   102  *  This function returns the L1 cache line size of the CPU
   103  *
   104  *  This is useful for determining multi-threaded structure padding
   105  *  or SIMD prefetch sizes.
   106  */
   107 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
   108 
   109 /**
   110  *  This function returns true if the CPU has the RDTSC instruction.
   111  */
   112 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
   113 
   114 /**
   115  *  This function returns true if the CPU has AltiVec features.
   116  */
   117 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
   118 
   119 /**
   120  *  This function returns true if the CPU has MMX features.
   121  */
   122 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
   123 
   124 /**
   125  *  This function returns true if the CPU has 3DNow! features.
   126  */
   127 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
   128 
   129 /**
   130  *  This function returns true if the CPU has SSE features.
   131  */
   132 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
   133 
   134 /**
   135  *  This function returns true if the CPU has SSE2 features.
   136  */
   137 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
   138 
   139 /**
   140  *  This function returns true if the CPU has SSE3 features.
   141  */
   142 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
   143 
   144 /**
   145  *  This function returns true if the CPU has SSE4.1 features.
   146  */
   147 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
   148 
   149 /**
   150  *  This function returns true if the CPU has SSE4.2 features.
   151  */
   152 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
   153 
   154 /**
   155  *  This function returns true if the CPU has AVX features.
   156  */
   157 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
   158 
   159 /**
   160  *  This function returns true if the CPU has AVX2 features.
   161  */
   162 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
   163 
   164 /**
   165  *  This function returns true if the CPU has NEON (ARM SIMD) features.
   166  */
   167 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
   168 
   169 /**
   170  *  This function returns the amount of RAM configured in the system, in MB.
   171  */
   172 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
   173 
   174 
   175 /* Ends C function definitions when using C++ */
   176 #ifdef __cplusplus
   177 }
   178 #endif
   179 #include "close_code.h"
   180 
   181 #endif /* SDL_cpuinfo_h_ */
   182 
   183 /* vi: set ts=4 sw=4 expandtab: */