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comparison lib/libavutil/cpu.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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 #define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt
37 #define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions
38 #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
39 #define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions
40 #define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower
41 #define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
42 #define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
43 #define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
44 #define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions
45 #define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
46 // #if LIBAVUTIL_VERSION_MAJOR <52
47 #define AV_CPU_FLAG_CMOV 0x1001000 ///< supports cmov instruction
48 // #else
49 // #define AV_CPU_FLAG_CMOV 0x1000 ///< supports cmov instruction
50 // #endif
51
52 #define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
53
54 #define AV_CPU_FLAG_ARMV5TE (1 << 0)
55 #define AV_CPU_FLAG_ARMV6 (1 << 1)
56 #define AV_CPU_FLAG_ARMV6T2 (1 << 2)
57 #define AV_CPU_FLAG_VFP (1 << 3)
58 #define AV_CPU_FLAG_VFPV3 (1 << 4)
59 #define AV_CPU_FLAG_NEON (1 << 5)
60
61 /**
62 * Return the flags which specify extensions supported by the CPU.
63 * The returned value is affected by av_force_cpu_flags() if that was used
64 * before. So av_get_cpu_flags() can easily be used in a application to
65 * detect the enabled cpu flags.
66 */
67 int av_get_cpu_flags(void);
68
69 /**
70 * Disables cpu detection and forces the specified flags.
71 * -1 is a special case that disables forcing of specific flags.
72 */
73 void av_force_cpu_flags(int flags);
74
75 /**
76 * Set a mask on flags returned by av_get_cpu_flags().
77 * This function is mainly useful for testing.
78 * Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible
79 *
80 * @warning this function is not thread safe.
81 */
82 attribute_deprecated void av_set_cpu_flags_mask(int mask);
83
84 /**
85 * Parse CPU flags from a string.
86 *
87 * The returned flags contain the specified flags as well as related unspecified flags.
88 *
89 * This function exists only for compatibility with libav.
90 * Please use av_parse_cpu_caps() when possible.
91 * @return a combination of AV_CPU_* flags, negative on error.
92 */
93 attribute_deprecated
94 int av_parse_cpu_flags(const char *s);
95
96 /**
97 * Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
98 *
99 * @return negative on error.
100 */
101 int av_parse_cpu_caps(unsigned *flags, const char *s);
102
103 /* The following CPU-specific functions shall not be called directly. */
104 int ff_get_cpu_flags_arm(void);
105 int ff_get_cpu_flags_ppc(void);
106 int ff_get_cpu_flags_x86(void);
107
108 #endif /* AVUTIL_CPU_H */