2 Simple DirectMedia Layer
3 Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
25 * CPU feature detection for SDL.
28 #ifndef SDL_cpuinfo_h_
29 #define SDL_cpuinfo_h_
31 #include "SDL_stdinc.h"
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))
37 /* Many of the intrinsics SDL uses are not implemented by clang with Visual Studio */
49 #endif /* __clang__ */
50 #elif defined(__MINGW64_VERSION_MAJOR)
54 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__) && !defined(SDL_DISABLE_ALTIVEC_H)
60 #if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
63 #if HAVE_IMMINTRIN_H && !defined(SDL_DISABLE_IMMINTRIN_H)
64 #include <immintrin.h>
66 #if defined(__MMX__) && !defined(SDL_DISABLE_MMINTRIN_H)
69 #if defined(__SSE__) && !defined(SDL_DISABLE_XMMINTRIN_H)
70 #include <xmmintrin.h>
72 #if defined(__SSE2__) && !defined(SDL_DISABLE_EMMINTRIN_H)
73 #include <emmintrin.h>
75 #if defined(__SSE3__) && !defined(SDL_DISABLE_PMMINTRIN_H)
76 #include <pmmintrin.h>
78 #endif /* HAVE_IMMINTRIN_H */
79 #endif /* compiler version */
81 #include "begin_code.h"
82 /* Set up for C function definitions, even when using C++ */
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.
92 #define SDL_CACHELINE_SIZE 128
95 * This function returns the number of CPU cores available.
97 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
100 * This function returns the L1 cache line size of the CPU
102 * This is useful for determining multi-threaded structure padding
103 * or SIMD prefetch sizes.
105 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
108 * This function returns true if the CPU has the RDTSC instruction.
110 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
113 * This function returns true if the CPU has AltiVec features.
115 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
118 * This function returns true if the CPU has MMX features.
120 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
123 * This function returns true if the CPU has 3DNow! features.
125 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
128 * This function returns true if the CPU has SSE features.
130 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
133 * This function returns true if the CPU has SSE2 features.
135 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
138 * This function returns true if the CPU has SSE3 features.
140 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
143 * This function returns true if the CPU has SSE4.1 features.
145 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
148 * This function returns true if the CPU has SSE4.2 features.
150 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
153 * This function returns true if the CPU has AVX features.
155 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
158 * This function returns true if the CPU has AVX2 features.
160 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
163 * This function returns true if the CPU has NEON (ARM SIMD) features.
165 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
168 * This function returns the amount of RAM configured in the system, in MB.
170 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
173 /* Ends C function definitions when using C++ */
177 #include "close_code.h"
179 #endif /* SDL_cpuinfo_h_ */
181 /* vi: set ts=4 sw=4 expandtab: */