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1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2013 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)
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 */
90 extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
91
92 /**
93 * This function returns true if the CPU has the RDTSC instruction.
94 */
95 extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
96
97 /**
98 * This function returns true if the CPU has AltiVec features.
99 */
100 extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
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 */
110 extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
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 */
130 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
131
132 /**
133 * This function returns true if the CPU has SSE4.2 features.
134 */
135 extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
136
137
138 /* Ends C function definitions when using C++ */
139 #ifdef __cplusplus
140 }
141 #endif
142 #include "close_code.h"
143
144 #endif /* _SDL_cpuinfo_h */
145
146 /* vi: set ts=4 sw=4 expandtab: */