libavutil/bfin/timer.h

   1 /*
   2  * Copyright (C) 2007 Marc Hoffman
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVUTIL_BFIN_TIMER_H
  22 #define AVUTIL_BFIN_TIMER_H
  23
  24 #include <stdint.h>
  25
  26 #define AV_READ_TIME read_time
  27
  28 static inline uint64_t read_time(void)
  29 {
  30     union {
  31         struct {
  32             unsigned lo;
  33             unsigned hi;
  34         } p;
  35         unsigned long long c;
  36     } t;
  37     __asm__ volatile ("%0=cycles; %1=cycles2;" : "=d" (t.p.lo), "=d" (t.p.hi));
  38     return t.c;
  39 }
  40
  41 #endif /* AVUTIL_BFIN_TIMER_H */