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  1. /*
  2.  * Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
  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. #include "libavutil/arm/asm.S"
  22.  
  23. function ff_ac3_update_bap_counts_arm, export=1
  24.         push            {lr}
  25.         ldrb            lr,  [r1], #1
  26. 1:
  27.         lsl             r3,  lr,  #1
  28.         ldrh            r12, [r0, r3]
  29.         subs            r2,  r2,  #1
  30.         it              gt
  31.         ldrbgt          lr,  [r1], #1
  32.         add             r12, r12, #1
  33.         strh            r12, [r0, r3]
  34.         bgt             1b
  35.         pop             {pc}
  36. endfunc
  37.