cpu.h 2.37 KB
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/*
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_CPU_H
#define AVUTIL_CPU_H

#define AV_CPU_FLAG_FORCE    0x80000000 /* force usage of selected flags (OR) */

    /* lower 16 bits - CPU features */
#define AV_CPU_FLAG_MMX          0x0001 ///< standard MMX
#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
#define AV_CPU_FLAG_SSE2         0x0010 ///< PIV SSE2 functions
#define AV_CPU_FLAG_SSE2SLOW 0x40000000 ///< SSE2 supported, but usually not faster
#define AV_CPU_FLAG_3DNOWEXT     0x0020 ///< AMD 3DNowExt
#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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#define AV_CPU_FLAG_SSSE3        0x0080 ///< Conroe SSSE3 functions
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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
#define AV_CPU_FLAG_SSE42        0x0200 ///< Nehalem SSE4.2 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_IWMMXT       0x0100 ///< XScale IWMMXT
#define AV_CPU_FLAG_ALTIVEC      0x0001 ///< standard

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/**
 * Return the flags which specify extensions supported by the CPU.
 */
int av_get_cpu_flags(void);

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/* The following CPU-specific functions shall not be called directly. */
int ff_get_cpu_flags_arm(void);
int ff_get_cpu_flags_ppc(void);
int ff_get_cpu_flags_x86(void);

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#endif  /* AVUTIL_CPU_H */