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ffmpeg-4.2.2/libavcodec/arm/videodsp_armv5te.S 1.08 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  @
  @ ARMv5te-optimized core video DSP functions
  @ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp>
  @
  @ 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
  @
  
  #include "config.h"
  #include "libavutil/arm/asm.S"
  
  function ff_prefetch_arm, export=1
  1:
          subs            r2,  r2,  #1
          pld             [r0]
          add             r0,  r0,  r1
          bne             1b
          bx              lr
  endfunc