From 439ccc4e0e7965d682907882116a5d18e83e1292 Mon Sep 17 00:00:00 2001 From: Måns Rullgård Date: Wed, 1 Apr 2009 22:56:22 +0000 Subject: Split libavutil/timer.h per architecture Originally committed as revision 18304 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavutil/ppc/timer.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 libavutil/ppc/timer.h (limited to 'libavutil/ppc/timer.h') diff --git a/libavutil/ppc/timer.h b/libavutil/ppc/timer.h new file mode 100644 index 0000000000..155fc01507 --- /dev/null +++ b/libavutil/ppc/timer.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2005 Luca Barbato + * + * 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 + +#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 */ -- cgit v1.2.3