aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
*
* 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 "libavutil/arm/asm.S"
function ff_add_pixels_clamped_armv6, export=1
push {r4-r8,lr}
mov r3, #8
1:
ldm r0!, {r4,r5,r12,lr}
ldrd r6, r7, [r1]
pkhbt r8, r4, r5, lsl #16
pkhtb r5, r5, r4, asr #16
pkhbt r4, r12, lr, lsl #16
pkhtb lr, lr, r12, asr #16
pld [r1, r2]
uxtab16 r8, r8, r6
uxtab16 r5, r5, r6, ror #8
uxtab16 r4, r4, r7
uxtab16 lr, lr, r7, ror #8
usat16 r8, #8, r8
usat16 r5, #8, r5
usat16 r4, #8, r4
usat16 lr, #8, lr
orr r6, r8, r5, lsl #8
orr r7, r4, lr, lsl #8
subs r3, r3, #1
strd_post r6, r7, r1, r2
bgt 1b
pop {r4-r8,pc}
endfunc
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