LCOV - code coverage report
Current view: top level - src/libavutil/x86 - timer.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 3 0.0 %
Date: 2017-09-22 00:04:37 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
       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_X86_TIMER_H
      22             : #define AVUTIL_X86_TIMER_H
      23             : 
      24             : #include <stdint.h>
      25             : 
      26             : #if HAVE_INLINE_ASM
      27             : 
      28             : #define FF_TIMER_UNITS "decicycles"
      29             : #define AV_READ_TIME read_time
      30             : 
      31           0 : static inline uint64_t read_time(void)
      32             : {
      33             :     uint32_t a, d;
      34           0 :     __asm__ volatile(
      35             : #if ARCH_X86_64 || defined(__SSE2__)
      36             :                      "lfence \n\t"
      37             : #endif
      38             :                      "rdtsc  \n\t"
      39             :                      : "=a" (a), "=d" (d));
      40           0 :     return ((uint64_t)d << 32) + a;
      41             : }
      42             : 
      43             : #elif HAVE_RDTSC
      44             : 
      45             : #include <intrin.h>
      46             : #define AV_READ_TIME __rdtsc
      47             : 
      48             : #endif /* HAVE_INLINE_ASM */
      49             : 
      50             : #endif /* AVUTIL_X86_TIMER_H */

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