SDL  2.0
SDL_cpuinfo.h
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2016 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 #include <intrin.h>
37 #ifndef _WIN64
38 #define __MMX__
39 #define __3dNOW__
40 #endif
41 #define __SSE__
42 #define __SSE2__
43 #elif defined(__MINGW64_VERSION_MAJOR)
44 #include <intrin.h>
45 #else
46 #ifdef __ALTIVEC__
47 #if HAVE_ALTIVEC_H && !defined(__APPLE_ALTIVEC__)
48 #include <altivec.h>
49 #undef pixel
50 #endif
51 #endif
52 #ifdef __MMX__
53 #include <mmintrin.h>
54 #endif
55 #ifdef __3dNOW__
56 #include <mm3dnow.h>
57 #endif
58 #ifdef __SSE__
59 #include <xmmintrin.h>
60 #endif
61 #ifdef __SSE2__
62 #include <emmintrin.h>
63 #endif
64 #endif
65 
66 #include "begin_code.h"
67 /* Set up for C function definitions, even when using C++ */
68 #ifdef __cplusplus
69 extern "C" {
70 #endif
71 
72 /* This is a guess for the cacheline size used for padding.
73  * Most x86 processors have a 64 byte cache line.
74  * The 64-bit PowerPC processors have a 128 byte cache line.
75  * We'll use the larger value to be generally safe.
76  */
77 #define SDL_CACHELINE_SIZE 128
78 
79 /**
80  * This function returns the number of CPU cores available.
81  */
82 extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);
83 
84 /**
85  * This function returns the L1 cache line size of the CPU
86  *
87  * This is useful for determining multi-threaded structure padding
88  * or SIMD prefetch sizes.
89  */
91 
92 /**
93  * This function returns true if the CPU has the RDTSC instruction.
94  */
96 
97 /**
98  * This function returns true if the CPU has AltiVec features.
99  */
101 
102 /**
103  * This function returns true if the CPU has MMX features.
104  */
105 extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
106 
107 /**
108  * This function returns true if the CPU has 3DNow! features.
109  */
111 
112 /**
113  * This function returns true if the CPU has SSE features.
114  */
115 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
116 
117 /**
118  * This function returns true if the CPU has SSE2 features.
119  */
120 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
121 
122 /**
123  * This function returns true if the CPU has SSE3 features.
124  */
125 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
126 
127 /**
128  * This function returns true if the CPU has SSE4.1 features.
129  */
131 
132 /**
133  * This function returns true if the CPU has SSE4.2 features.
134  */
136 
137 /**
138  * This function returns true if the CPU has AVX features.
139  */
140 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
141 
142 /**
143  * This function returns true if the CPU has AVX2 features.
144  */
145 extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
146 
147 /**
148  * This function returns the amount of RAM configured in the system, in MB.
149  */
150 extern DECLSPEC int SDLCALL SDL_GetSystemRAM(void);
151 
152 
153 /* Ends C function definitions when using C++ */
154 #ifdef __cplusplus
155 }
156 #endif
157 #include "close_code.h"
158 
159 #endif /* _SDL_cpuinfo_h */
160 
161 /* vi: set ts=4 sw=4 expandtab: */
int SDL_GetCPUCount(void)
Definition: SDL_cpuinfo.c:422
SDL_bool SDL_Has3DNow(void)
Definition: SDL_cpuinfo.c:653
SDL_bool SDL_HasRDTSC(void)
Definition: SDL_cpuinfo.c:626
SDL_bool SDL_HasAVX2(void)
Definition: SDL_cpuinfo.c:716
SDL_bool SDL_HasSSE41(void)
Definition: SDL_cpuinfo.c:689
SDL_bool SDL_HasSSE42(void)
Definition: SDL_cpuinfo.c:698
SDL_bool SDL_HasSSE3(void)
Definition: SDL_cpuinfo.c:680
SDL_bool SDL_HasSSE(void)
Definition: SDL_cpuinfo.c:662
#define DECLSPEC
Definition: SDL_internal.h:30
SDL_bool SDL_HasAVX(void)
Definition: SDL_cpuinfo.c:707
SDL_bool SDL_HasAltiVec(void)
Definition: SDL_cpuinfo.c:635
SDL_bool SDL_HasMMX(void)
Definition: SDL_cpuinfo.c:644
SDL_bool
Definition: SDL_stdinc.h:130
SDL_bool SDL_HasSSE2(void)
Definition: SDL_cpuinfo.c:671
int SDL_GetSystemRAM(void)
Definition: SDL_cpuinfo.c:727
#define SDLCALL
Definition: SDL_internal.h:31
int SDL_GetCPUCacheLineSize(void)
Definition: SDL_cpuinfo.c:564