yading@11: /*
yading@11:  * Copyright (c) 2005 Luca Barbato <lu_zero@gentoo.org>
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_PPC_TIMER_H
yading@11: #define AVUTIL_PPC_TIMER_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: 
yading@11: #define AV_READ_TIME read_time
yading@11: 
yading@11: static inline uint64_t read_time(void)
yading@11: {
yading@11:     uint32_t tbu, tbl, temp;
yading@11: 
yading@11:      /* from section 2.2.1 of the 32-bit PowerPC PEM */
yading@11:      __asm__ volatile(
yading@11:          "1:\n"
yading@11:          "mftbu  %2\n"
yading@11:          "mftb   %0\n"
yading@11:          "mftbu  %1\n"
yading@11:          "cmpw   %2,%1\n"
yading@11:          "bne    1b\n"
yading@11:      : "=r"(tbl), "=r"(tbu), "=r"(temp)
yading@11:      :
yading@11:      : "cc");
yading@11: 
yading@11:      return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
yading@11: }
yading@11: 
yading@11: #endif /* AVUTIL_PPC_TIMER_H */