mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2005 Luca Barbato <lu_zero@gentoo.org>
|
||
|
|
*
|
||
|
|
* 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_PPC_TIMER_H
|
||
|
|
#define AVUTIL_PPC_TIMER_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#define AV_READ_TIME read_time
|
||
|
|
|
||
|
|
static inline uint64_t read_time(void)
|
||
|
|
{
|
||
|
|
uint32_t tbu, tbl, temp;
|
||
|
|
|
||
|
|
/* from section 2.2.1 of the 32-bit PowerPC PEM */
|
||
|
|
__asm__ volatile(
|
||
|
|
"1:\n"
|
||
|
|
"mftbu %2\n"
|
||
|
|
"mftb %0\n"
|
||
|
|
"mftbu %1\n"
|
||
|
|
"cmpw %2,%1\n"
|
||
|
|
"bne 1b\n"
|
||
|
|
: "=r"(tbl), "=r"(tbu), "=r"(temp)
|
||
|
|
:
|
||
|
|
: "cc");
|
||
|
|
|
||
|
|
return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* AVUTIL_PPC_TIMER_H */
|