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 68/** 69 * Return the flags which specify extensions supported by the CPU. 70 * The returned value is affected by av_force_cpu_flags() if that was used 71 * before. So av_get_cpu_flags() can easily be used in a application to 72 * detect the enabled cpu flags. 73 */ 74int av_get_cpu_flags(void); 75 76/** 77 * Disables cpu detection and forces the specified flags. 78 * -1 is a special case that disables forcing of specific flags. 79 */ 80void av_force_cpu_flags(int flags); 81 82/** 83 * Set a mask on flags returned by av_get_cpu_flags(). 84 * This function is mainly useful for testing. 85 * Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible 86 * 87 * @warning this function is not thread safe. 88 */ 89attribute_deprecated void av_set_cpu_flags_mask(int mask); 90 91/** 92 * Parse CPU flags from a string. 93 * 94 * The returned flags contain the specified flags as well as related unspecified flags. 95 * 96 * This function exists only for compatibility with libav. 97 * Please use av_parse_cpu_caps() when possible. 98 * @return a combination of AV_CPU_* flags, negative on error. 99 */ 100attribute_deprecated 101int av_parse_cpu_flags(const char *s); 102 103/** 104 * Parse CPU caps from a string and update the given AV_CPU_* flags based on that. 105 * 106 * @return negative on error. 107 */ 108int av_parse_cpu_caps(unsigned *flags, const char *s); 109 110/** 111 * @return the number of logical CPU cores present. 112 */ 113int av_cpu_count(void); 114 115#endif /* AVUTIL_CPU_H */ 116