SDL  2.0
SDL_cpuinfo.h
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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 defined(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(__ARM_NEON__) && !defined(SDL_DISABLE_ARM_NEON_H)
61 #include <arm_neon.h>
62 #endif
63 #if defined(__mips_msa) && defined(HAVE_MSA_H) && !defined(SDL_DISABLE_MSA_H)
64 #include <msa.h>
65 #define __MSA__
66 #endif
67 #if defined(__loongarch_sx) && defined(HAVE_LSX_H) && !defined(SDL_DISABLE_LSX_H)
68 #include <lsxintrin.h>
69 #define __LSX__
70 #endif
71 #if defined(__3dNOW__) && !defined(SDL_DISABLE_MM3DNOW_H)
72 #include <mm3dnow.h>
73 #endif
74 #if defined(HAVE_IMMINTRIN_H) && !defined(SDL_DISABLE_IMMINTRIN_H)
75 #include <immintrin.h>
76 #else
77 #if defined(__MMX__) && !defined(SDL_DISABLE_MMINTRIN_H)
78 #include <mmintrin.h>
79 #endif
80 #if defined(__SSE__) && !defined(SDL_DISABLE_XMMINTRIN_H)
81 #include <xmmintrin.h>
82 #endif
83 #if defined(__SSE2__) && !defined(SDL_DISABLE_EMMINTRIN_H)
84 #include <emmintrin.h>
85 #endif
86 #if defined(__SSE3__) && !defined(SDL_DISABLE_PMMINTRIN_H)
87 #include <pmmintrin.h>
88 #endif
89 #endif /* HAVE_IMMINTRIN_H */
90 #endif /* compiler version */
91 
92 #include "begin_code.h"
93 /* Set up for C function definitions, even when using C++ */
94 #ifdef __cplusplus
95 extern "C" {
96 #endif
97 
98 /* This is a guess for the cacheline size used for padding.
99  * Most x86 processors have a 64 byte cache line.
100  * The 64-bit PowerPC processors have a 128 byte cache line.
101  * We'll use the larger value to be generally safe.
102  */
103 #define SDL_CACHELINE_SIZE 128
104 
105 /**
106  * This function returns the number of CPU cores available.
107  */
108 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
109 
110 /**
111  * This function returns the L1 cache line size of the CPU
112  *
113  * This is useful for determining multi-threaded structure padding
114  * or SIMD prefetch sizes.
115  */
116 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
117 
118 /**
119  * This function returns true if the CPU has the RDTSC instruction.
120  */
122 
123 /**
124  * This function returns true if the CPU has AltiVec features.
125  */
127 
128 /**
129  * This function returns true if the CPU has MMX features.
130  */
131 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
132 
133 /**
134  * This function returns true if the CPU has 3DNow! features.
135  */
137 
138 /**
139  * This function returns true if the CPU has SSE features.
140  */
141 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
142 
143 /**
144  * This function returns true if the CPU has SSE2 features.
145  */
146 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
147 
148 /**
149  * This function returns true if the CPU has SSE3 features.
150  */
151 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
152 
153 /**
154  * This function returns true if the CPU has SSE4.1 features.
155  */
157 
158 /**
159  * This function returns true if the CPU has SSE4.2 features.
160  */
162 
163 /**
164  * This function returns true if the CPU has AVX features.
165  */
166 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
167 
168 /**
169  * This function returns true if the CPU has AVX2 features.
170  */
171 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
172 
173 /**
174  * This function returns true if the CPU has AVX-512F (foundation) features.
175  */
177 
178 /**
179  * This function returns true if the CPU has NEON (ARM SIMD) features.
180  */
181 extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
182 
183 /**
184  * This function returns true if the CPU has MSA (MIPS SIMD) features.
185  */
186 extern DECLSPEC SDL_bool SDLCALL SDL_HasMSA(void);
187 
188 /**
189  * This function returns true if the CPU has LSX (LOONGARCH SIMD) features.
190  */
191 extern DECLSPEC SDL_bool SDLCALL SDL_HasLSX(void);
192 
193 /**
194  * This function returns true if the CPU has LASX (LOONGARCH SIMD) features.
195  */
196 extern DECLSPEC SDL_bool SDLCALL SDL_HasLASX(void);
197 
198 /**
199  * This function returns the amount of RAM configured in the system, in MB.
200  */
201 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
202 
203 /* Ends C function definitions when using C++ */
204 #ifdef __cplusplus
205 }
206 #endif
207 #include "close_code.h"
208 
209 #endif /* SDL_cpuinfo_h_ */
210 
211 /* vi: set ts=4 sw=4 expandtab: */
int SDL_GetCPUCount(void)
Definition: SDL_cpuinfo.c:483
SDL_bool SDL_Has3DNow(void)
Definition: SDL_cpuinfo.c:747
SDL_bool SDL_HasRDTSC(void)
Definition: SDL_cpuinfo.c:729
SDL_bool SDL_HasNEON(void)
Definition: SDL_cpuinfo.c:801
SDL_bool SDL_HasAVX2(void)
Definition: SDL_cpuinfo.c:789
SDL_bool SDL_HasSSE41(void)
Definition: SDL_cpuinfo.c:771
SDL_bool SDL_HasSSE42(void)
Definition: SDL_cpuinfo.c:777
SDL_bool SDL_HasSSE3(void)
Definition: SDL_cpuinfo.c:765
SDL_bool SDL_HasSSE(void)
Definition: SDL_cpuinfo.c:753
SDL_bool SDL_HasLASX(void)
Definition: SDL_cpuinfo.c:819
#define DECLSPEC
Definition: SDL_internal.h:44
SDL_bool SDL_HasAVX512F(void)
Definition: SDL_cpuinfo.c:795
SDL_bool SDL_HasAVX(void)
Definition: SDL_cpuinfo.c:783
SDL_bool SDL_HasAltiVec(void)
Definition: SDL_cpuinfo.c:735
SDL_bool SDL_HasMSA(void)
Definition: SDL_cpuinfo.c:807
SDL_bool SDL_HasLSX(void)
Definition: SDL_cpuinfo.c:813
SDL_bool SDL_HasMMX(void)
Definition: SDL_cpuinfo.c:741
SDL_bool
Definition: SDL_stdinc.h:161
SDL_bool SDL_HasSSE2(void)
Definition: SDL_cpuinfo.c:759
int SDL_GetSystemRAM(void)
Definition: SDL_cpuinfo.c:827
#define SDLCALL
Definition: SDL_internal.h:45
int SDL_GetCPUCacheLineSize(void)
Definition: SDL_cpuinfo.c:633