FFmpeg/libavcodec/arm/ac3dsp_arm.S
Justin Ruggles 94d2b0d2fd ARM: Move asm.S from libavcodec to libavutil
This will allow for easier implementation of ARM-optimized functions in
libraries other than libavcodec.
2012-06-08 13:14:38 -04:00

37 lines
1.3 KiB
ArmAsm

/*
* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/arm/asm.S"
function ff_ac3_update_bap_counts_arm, export=1
push {lr}
ldrb lr, [r1], #1
1:
lsl r3, lr, #1
ldrh r12, [r0, r3]
subs r2, r2, #1
it gt
ldrbgt lr, [r1], #1
add r12, r12, #1
strh r12, [r0, r3]
bgt 1b
pop {pc}
endfunc