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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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44
media/libav/libavutil/x86/timer.h Normal file
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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* 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.
*
* Libav is distributed in the hope that it will be useful,
* 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
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_X86_TIMER_H
#define AVUTIL_X86_TIMER_H
#include <stdint.h>
#if HAVE_INLINE_ASM
#define AV_READ_TIME read_time
static inline uint64_t read_time(void)
{
uint32_t a, d;
__asm__ volatile("rdtsc" : "=a" (a), "=d" (d));
return ((uint64_t)d << 32) + a;
}
#elif HAVE_RDTSC
#include <intrin.h>
#define AV_READ_TIME __rdtsc
#endif /* HAVE_INLINE_ASM */
#endif /* AVUTIL_X86_TIMER_H */