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