51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
|
/*
|
||
|
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg 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.
|
||
|
|
*
|
||
|
|
* FFmpeg 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 FFmpeg; 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 FF_TIMER_UNITS "decicycles"
|
||
|
|
#define AV_READ_TIME read_time
|
||
|
|
|
||
|
|
static inline uint64_t read_time(void)
|
||
|
|
{
|
||
|
|
uint32_t a, d;
|
||
|
|
__asm__ volatile(
|
||
|
|
#if ARCH_X86_64 || defined(__SSE2__)
|
||
|
|
"lfence \n\t"
|
||
|
|
#endif
|
||
|
|
"rdtsc \n\t"
|
||
|
|
: "=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 */
|