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 <stddef.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_SSSE3SLOW 0x4000000 ///< SSSE3 supported, but usually not faster 43#define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower 44#define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions 45#define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions 46#define AV_CPU_FLAG_AESNI 0x80000 ///< Advanced Encryption Standard functions 47#define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used 48#define AV_CPU_FLAG_AVXSLOW 0x8000000 ///< AVX supported, but slow when using YMM registers (e.g. Bulldozer) 49#define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions 50#define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions 51#define AV_CPU_FLAG_CMOV 0x1000 ///< supports cmov instruction 52#define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used 53#define AV_CPU_FLAG_FMA3 0x10000 ///< Haswell FMA3 functions 54#define AV_CPU_FLAG_BMI1 0x20000 ///< Bit Manipulation Instruction Set 1 55#define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2 56#define AV_CPU_FLAG_AVX512 0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used 57#define AV_CPU_FLAG_AVX512ICL 0x200000 ///< F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ 58#define AV_CPU_FLAG_SLOW_GATHER 0x2000000 ///< CPU has slow gathers. 59 60#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard 61#define AV_CPU_FLAG_VSX 0x0002 ///< ISA 2.06 62#define AV_CPU_FLAG_POWER8 0x0004 ///< ISA 2.07 63 64#define AV_CPU_FLAG_ARMV5TE (1 << 0) 65#define AV_CPU_FLAG_ARMV6 (1 << 1) 66#define AV_CPU_FLAG_ARMV6T2 (1 << 2) 67#define AV_CPU_FLAG_VFP (1 << 3) 68#define AV_CPU_FLAG_VFPV3 (1 << 4) 69#define AV_CPU_FLAG_NEON (1 << 5) 70#define AV_CPU_FLAG_ARMV8 (1 << 6) 71#define AV_CPU_FLAG_VFP_VM (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations 72#define AV_CPU_FLAG_SETEND (1 <<16) 73 74#define AV_CPU_FLAG_MMI (1 << 0) 75#define AV_CPU_FLAG_MSA (1 << 1) 76 77//Loongarch SIMD extension. 78#define AV_CPU_FLAG_LSX (1 << 0) 79#define AV_CPU_FLAG_LASX (1 << 1) 80 81/** 82 * Return the flags which specify extensions supported by the CPU. 83 * The returned value is affected by av_force_cpu_flags() if that was used 84 * before. So av_get_cpu_flags() can easily be used in an application to 85 * detect the enabled cpu flags. 86 */ 87int av_get_cpu_flags(void); 88 89/** 90 * Disables cpu detection and forces the specified flags. 91 * -1 is a special case that disables forcing of specific flags. 92 */ 93void av_force_cpu_flags(int flags); 94 95/** 96 * Parse CPU caps from a string and update the given AV_CPU_* flags based on that. 97 * 98 * @return negative on error. 99 */ 100int av_parse_cpu_caps(unsigned *flags, const char *s); 101 102/** 103 * @return the number of logical CPU cores present. 104 */ 105int av_cpu_count(void); 106 107/** 108 * Overrides cpu count detection and forces the specified count. 109 * Count < 1 disables forcing of specific count. 110 */ 111void av_cpu_force_count(int count); 112 113/** 114 * Get the maximum data alignment that may be required by FFmpeg. 115 * 116 * Note that this is affected by the build configuration and the CPU flags mask, 117 * so e.g. if the CPU supports AVX, but libavutil has been built with 118 * --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through 119 * av_set_cpu_flags_mask(), then this function will behave as if AVX is not 120 * present. 121 */ 122size_t av_cpu_max_align(void); 123 124#endif /* AVUTIL_CPU_H */ 125