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130 lines
5.5 KiB
C
130 lines
5.5 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_CPU_H
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#define AVUTIL_CPU_H
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#include <stddef.h>
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#include "attributes.h"
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#define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */
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/* lower 16 bits - CPU features */
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#define AV_CPU_FLAG_MMX 0x0001 ///< standard MMX
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#define AV_CPU_FLAG_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
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#define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext
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#define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW
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#define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions
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#define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions
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#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
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///< than regular MMX/SSE (e.g. Core1)
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#define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt
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#define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions
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#define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster
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///< than regular MMX/SSE (e.g. Core1)
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#define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions
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#define AV_CPU_FLAG_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster
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#define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower
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#define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
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#define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
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#define AV_CPU_FLAG_AESNI 0x80000 ///< Advanced Encryption Standard functions
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#define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
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#define AV_CPU_FLAG_AVXSLOW 0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer)
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#define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions
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#define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
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#define AV_CPU_FLAG_CMOV 0x1000 ///< supports cmov instruction
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#define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used
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#define AV_CPU_FLAG_FMA3 0x10000 ///< Haswell FMA3 functions
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#define AV_CPU_FLAG_BMI1 0x20000 ///< Bit Manipulation Instruction Set 1
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#define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2
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#define AV_CPU_FLAG_AVX512 0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used
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#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
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#define AV_CPU_FLAG_VSX 0x0002 ///< ISA 2.06
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#define AV_CPU_FLAG_POWER8 0x0004 ///< ISA 2.07
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#define AV_CPU_FLAG_ARMV5TE (1 << 0)
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#define AV_CPU_FLAG_ARMV6 (1 << 1)
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#define AV_CPU_FLAG_ARMV6T2 (1 << 2)
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#define AV_CPU_FLAG_VFP (1 << 3)
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#define AV_CPU_FLAG_VFPV3 (1 << 4)
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#define AV_CPU_FLAG_NEON (1 << 5)
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#define AV_CPU_FLAG_ARMV8 (1 << 6)
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#define AV_CPU_FLAG_VFP_VM (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations
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#define AV_CPU_FLAG_SETEND (1 <<16)
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/**
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* Return the flags which specify extensions supported by the CPU.
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* The returned value is affected by av_force_cpu_flags() if that was used
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* before. So av_get_cpu_flags() can easily be used in an application to
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* detect the enabled cpu flags.
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*/
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int av_get_cpu_flags(void);
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/**
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* Disables cpu detection and forces the specified flags.
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* -1 is a special case that disables forcing of specific flags.
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*/
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void av_force_cpu_flags(int flags);
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/**
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* Set a mask on flags returned by av_get_cpu_flags().
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* This function is mainly useful for testing.
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* Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible
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*/
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attribute_deprecated void av_set_cpu_flags_mask(int mask);
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/**
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* Parse CPU flags from a string.
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*
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* The returned flags contain the specified flags as well as related unspecified flags.
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*
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* This function exists only for compatibility with libav.
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* Please use av_parse_cpu_caps() when possible.
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* @return a combination of AV_CPU_* flags, negative on error.
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*/
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attribute_deprecated
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int av_parse_cpu_flags(const char *s);
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/**
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* Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
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*
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* @return negative on error.
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*/
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int av_parse_cpu_caps(unsigned *flags, const char *s);
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/**
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* @return the number of logical CPU cores present.
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*/
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int av_cpu_count(void);
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/**
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* Get the maximum data alignment that may be required by FFmpeg.
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*
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* Note that this is affected by the build configuration and the CPU flags mask,
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* so e.g. if the CPU supports AVX, but libavutil has been built with
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* --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through
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* av_set_cpu_flags_mask(), then this function will behave as if AVX is not
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* present.
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*/
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size_t av_cpu_max_align(void);
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#endif /* AVUTIL_CPU_H */
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