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: */ 182