cpu.h (3480B)
1 /* 2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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 "version.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 #if FF_API_CPU_FLAG_MMX2 32 #define AV_CPU_FLAG_MMX2 0x0002 ///< SSE integer functions or AMD MMX ext 33 #endif 34 #define AV_CPU_FLAG_3DNOW 0x0004 ///< AMD 3DNOW 35 #define AV_CPU_FLAG_SSE 0x0008 ///< SSE functions 36 #define AV_CPU_FLAG_SSE2 0x0010 ///< PIV SSE2 functions 37 #define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster 38 ///< than regular MMX/SSE (e.g. Core1) 39 #define AV_CPU_FLAG_3DNOWEXT 0x0020 ///< AMD 3DNowExt 40 #define AV_CPU_FLAG_SSE3 0x0040 ///< Prescott SSE3 functions 41 #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster 42 ///< than regular MMX/SSE (e.g. Core1) 43 #define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions 44 #define AV_CPU_FLAG_ATOM 0x10000000 ///< Atom processor, some SSSE3 instructions are slower 45 #define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions 46 #define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 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_XOP 0x0400 ///< Bulldozer XOP functions 49 #define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions 50 #define AV_CPU_FLAG_CMOV 0x1000 ///< i686 cmov 51 #define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used 52 53 #define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard 54 55 #define AV_CPU_FLAG_ARMV5TE (1 << 0) 56 #define AV_CPU_FLAG_ARMV6 (1 << 1) 57 #define AV_CPU_FLAG_ARMV6T2 (1 << 2) 58 #define AV_CPU_FLAG_VFP (1 << 3) 59 #define AV_CPU_FLAG_VFPV3 (1 << 4) 60 #define AV_CPU_FLAG_NEON (1 << 5) 61 62 /** 63 * Return the flags which specify extensions supported by the CPU. 64 */ 65 int av_get_cpu_flags(void); 66 67 /** 68 * Set a mask on flags returned by av_get_cpu_flags(). 69 * This function is mainly useful for testing. 70 * 71 * @warning this function is not thread safe. 72 */ 73 void av_set_cpu_flags_mask(int mask); 74 75 /** 76 * Parse CPU flags from a string. 77 * 78 * @return a combination of AV_CPU_* flags, negative on error. 79 */ 80 int av_parse_cpu_flags(const char *s); 81 82 /** 83 * @return the number of logical CPU cores present. 84 */ 85 int av_cpu_count(void); 86 87 #endif /* AVUTIL_CPU_H */