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ffmpeg / libavutil / x86 / timer.h @ 439ccc4e

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/*
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 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVUTIL_X86_TIMER_H
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#define AVUTIL_X86_TIMER_H
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#include <stdint.h>
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#define AV_READ_TIME read_time
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static inline uint64_t read_time(void)
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{
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    uint32_t a, d;
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    __asm__ volatile("rdtsc" : "=a" (a), "=d" (d));
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    return ((uint64_t)d << 32) + a;
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}
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#endif /* AVUTIL_X86_TIMER_H */