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
84extern "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 */
97extern 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 */
105extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);
106
107/**
108 * This function returns true if the CPU has the RDTSC instruction.
109 */
110extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void);
111
112/**
113 * This function returns true if the CPU has AltiVec features.
114 */
115extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void);
116
117/**
118 * This function returns true if the CPU has MMX features.
119 */
120extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void);
121
122/**
123 * This function returns true if the CPU has 3DNow! features.
124 */
125extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void);
126
127/**
128 * This function returns true if the CPU has SSE features.
129 */
130extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void);
131
132/**
133 * This function returns true if the CPU has SSE2 features.
134 */
135extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void);
136
137/**
138 * This function returns true if the CPU has SSE3 features.
139 */
140extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE3(void);
141
142/**
143 * This function returns true if the CPU has SSE4.1 features.
144 */
145extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE41(void);
146
147/**
148 * This function returns true if the CPU has SSE4.2 features.
149 */
150extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE42(void);
151
152/**
153 * This function returns true if the CPU has AVX features.
154 */
155extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX(void);
156
157/**
158 * This function returns true if the CPU has AVX2 features.
159 */
160extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
161
162/**
163 * This function returns true if the CPU has NEON (ARM SIMD) features.
164 */
165extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
166
167/**
168 * This function returns the amount of RAM configured in the system, in MB.
169 */
170extern 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