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1 | /* |
2 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVUTIL_CPU_H | |
22 | #define AVUTIL_CPU_H | |
23 | ||
24 | #include "attributes.h" | |
25 | ||
26 | #define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */ | |
27 | ||
28 | /* lower 16 bits - CPU features */ | |
29 | #define AV_CPU_FLAG_MMX 0x0001 ///< standard MMX | |
30 | #define AV_CPU_FLAG_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext | |
31 | #define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext | |
32 | #define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW | |
33 | #define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions | |
34 | #define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions | |
35 | #define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster | |
36 | ///< than regular MMX/SSE (e.g. Core1) | |
37 | #define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt | |
38 | #define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions | |
39 | #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster | |
40 | ///< than regular MMX/SSE (e.g. Core1) | |
41 | #define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions | |
42 | #define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower | |
43 | #define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions | |
44 | #define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions | |
45 | #define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used | |
46 | #define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions | |
47 | #define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions | |
48 | // #if LIBAVUTIL_VERSION_MAJOR <52 | |
49 | #define AV_CPU_FLAG_CMOV 0x1001000 ///< supports cmov instruction | |
50 | // #else | |
51 | // #define AV_CPU_FLAG_CMOV 0x1000 ///< supports cmov instruction | |
52 | // #endif | |
53 | #define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used | |
54 | #define AV_CPU_FLAG_FMA3 0x10000 ///< Haswell FMA3 functions | |
55 | #define AV_CPU_FLAG_BMI1 0x20000 ///< Bit Manipulation Instruction Set 1 | |
56 | #define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2 | |
57 | ||
58 | #define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard | |
59 | ||
60 | #define AV_CPU_FLAG_ARMV5TE (1 << 0) | |
61 | #define AV_CPU_FLAG_ARMV6 (1 << 1) | |
62 | #define AV_CPU_FLAG_ARMV6T2 (1 << 2) | |
63 | #define AV_CPU_FLAG_VFP (1 << 3) | |
64 | #define AV_CPU_FLAG_VFPV3 (1 << 4) | |
65 | #define AV_CPU_FLAG_NEON (1 << 5) | |
66 | #define AV_CPU_FLAG_ARMV8 (1 << 6) | |
67 | #define AV_CPU_FLAG_SETEND (1 <<16) | |
68 | ||
69 | /** | |
70 | * Return the flags which specify extensions supported by the CPU. | |
71 | * The returned value is affected by av_force_cpu_flags() if that was used | |
72 | * before. So av_get_cpu_flags() can easily be used in a application to | |
73 | * detect the enabled cpu flags. | |
74 | */ | |
75 | int av_get_cpu_flags(void); | |
76 | ||
77 | /** | |
78 | * Disables cpu detection and forces the specified flags. | |
79 | * -1 is a special case that disables forcing of specific flags. | |
80 | */ | |
81 | void av_force_cpu_flags(int flags); | |
82 | ||
83 | /** | |
84 | * Set a mask on flags returned by av_get_cpu_flags(). | |
85 | * This function is mainly useful for testing. | |
86 | * Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible | |
87 | * | |
88 | * @warning this function is not thread safe. | |
89 | */ | |
90 | attribute_deprecated void av_set_cpu_flags_mask(int mask); | |
91 | ||
92 | /** | |
93 | * Parse CPU flags from a string. | |
94 | * | |
95 | * The returned flags contain the specified flags as well as related unspecified flags. | |
96 | * | |
97 | * This function exists only for compatibility with libav. | |
98 | * Please use av_parse_cpu_caps() when possible. | |
99 | * @return a combination of AV_CPU_* flags, negative on error. | |
100 | */ | |
101 | attribute_deprecated | |
102 | int av_parse_cpu_flags(const char *s); | |
103 | ||
104 | /** | |
105 | * Parse CPU caps from a string and update the given AV_CPU_* flags based on that. | |
106 | * | |
107 | * @return negative on error. | |
108 | */ | |
109 | int av_parse_cpu_caps(unsigned *flags, const char *s); | |
110 | ||
111 | /** | |
112 | * @return the number of logical CPU cores present. | |
113 | */ | |
114 | int av_cpu_count(void); | |
115 | ||
116 | #endif /* AVUTIL_CPU_H */ |