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libavutil/ppc/timer.h
48 строк
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Michael Niedermayer
Merge commit 'ef5b70affc6376bfeadd1ff649b79bad9a124fa8'
12 июл 2013, 14:07
12 июл 2013, 14:07
c695358
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/* * 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> #include "config.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( "mftbu %2\n" "mftb %0\n" "mftbu %1\n" "cmpw %2,%1\n" "bne $-0x10\n" : "=r"(tbl), "=r"(tbu), "=r"(temp) : : "cc"); return (((uint64_t)tbu)<<32) | (uint64_t)tbl; } #endif /* AVUTIL_PPC_TIMER_H */