mirror of https://git.ffmpeg.org/ffmpeg.git
53 lines
1.7 KiB
ArmAsm
53 lines
1.7 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 "asm.S"
|
|
|
|
function ff_ac3_compute_mantissa_size_arm, export=1
|
|
push {r4-r8,lr}
|
|
ldm r0, {r4-r8}
|
|
mov r3, r0
|
|
mov r0, #0
|
|
1:
|
|
ldrb lr, [r1], #1
|
|
subs r2, r2, #1
|
|
blt 2f
|
|
cmp lr, #4
|
|
bgt 3f
|
|
subs lr, lr, #1
|
|
addlt r4, r4, #1
|
|
addeq r5, r5, #1
|
|
ble 1b
|
|
subs lr, lr, #2
|
|
addlt r6, r6, #1
|
|
addeq r7, r7, #1
|
|
addgt r8, r8, #1
|
|
b 1b
|
|
3:
|
|
cmp lr, #14
|
|
sublt lr, lr, #1
|
|
addgt r0, r0, #16
|
|
addle r0, r0, lr
|
|
b 1b
|
|
2:
|
|
stm r3, {r4-r8}
|
|
pop {r4-r8,pc}
|
|
endfunc
|