2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * This file is part of FFmpeg.
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.
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.
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
24 #include "attributes.h"
26 #define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */
28 /* lower 16 bits - CPU features */
29 #define AV_CPU_FLAG_MMX 0x0001 ///< standard MMX
30 #define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
31 #define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW
32 #define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions
33 #define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions
34 #define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
35 #define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt
36 #define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions
37 #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
38 #define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions
39 #define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower
40 #define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
41 #define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
42 #define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
43 #define AV_CPU_FLAG_CMOV 0x1000000 ///< supports cmov instruction
44 #define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions
45 #define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
46 #define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
48 #define AV_CPU_FLAG_ARMV5TE (1 << 0)
49 #define AV_CPU_FLAG_ARMV6 (1 << 1)
50 #define AV_CPU_FLAG_ARMV6T2 (1 << 2)
51 #define AV_CPU_FLAG_VFP (1 << 3)
52 #define AV_CPU_FLAG_VFPV3 (1 << 4)
53 #define AV_CPU_FLAG_NEON (1 << 5)
56 * Return the flags which specify extensions supported by the CPU.
58 int av_get_cpu_flags(void);
61 * Disables cpu detection and forces the specified flags.
62 * -1 is a special case that disables forcing of specific flags.
64 void av_force_cpu_flags(int flags);
67 * Set a mask on flags returned by av_get_cpu_flags().
68 * This function is mainly useful for testing.
69 * Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible
71 * @warning this function is not thread safe.
73 attribute_deprecated void av_set_cpu_flags_mask(int mask);
76 * Parse CPU flags from a string.
78 * @return a combination of AV_CPU_* flags, negative on error.
80 int av_parse_cpu_flags(const char *s);
82 /* The following CPU-specific functions shall not be called directly. */
83 int ff_get_cpu_flags_arm(void);
84 int ff_get_cpu_flags_ppc(void);
85 int ff_get_cpu_flags_x86(void);
87 #endif /* AVUTIL_CPU_H */