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 LIBAVUTIL_VERSION_MAJOR < 52

    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 #define AV_CPU_FLAG_3DNOWEXT     0x0020 ///< AMD 3DNowExt

    39 #define AV_CPU_FLAG_SSE3         0x0040 ///< Prescott SSE3 functions

    40 #define AV_CPU_FLAG_SSE3SLOW 0x20000000 ///< SSE3 supported, but usually not faster

    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 #define AV_CPU_FLAG_CMOV         0x1000 ///< i686 cmov

    49 

    50 #define AV_CPU_FLAG_ALTIVEC      0x0001 ///< standard

    51 

    52 #define AV_CPU_FLAG_ARMV5TE      (1 << 0)

    53 #define AV_CPU_FLAG_ARMV6        (1 << 1)

    54 #define AV_CPU_FLAG_ARMV6T2      (1 << 2)

    55 #define AV_CPU_FLAG_VFP          (1 << 3)

    56 #define AV_CPU_FLAG_VFPV3        (1 << 4)

    57 #define AV_CPU_FLAG_NEON         (1 << 5)

    58 

    59 /**

    60  * Return the flags which specify extensions supported by the CPU.

    61  */

    62 int av_get_cpu_flags(void);

    63 

    64 /**

    65  * Set a mask on flags returned by av_get_cpu_flags().

    66  * This function is mainly useful for testing.

    67  *

    68  * @warning this function is not thread safe.

    69  */

    70 void av_set_cpu_flags_mask(int mask);

    71 

    72 /**

    73  * Parse CPU flags from a string.

    74  *

    75  * @return a combination of AV_CPU_* flags, negative on error.

    76  */

    77 int av_parse_cpu_flags(const char *s);

    78 

    79 /* The following CPU-specific functions shall not be called directly. */

    80 int ff_get_cpu_flags_arm(void);

    81 int ff_get_cpu_flags_ppc(void);

    82 int ff_get_cpu_flags_x86(void);

    83 

    84 #endif /* AVUTIL_CPU_H */