49 lines
1.8 KiB
ArmAsm
49 lines
1.8 KiB
ArmAsm
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/*
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* Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/arm/asm.S"
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function ff_add_pixels_clamped_armv6, export=1
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push {r4-r8,lr}
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mov r3, #8
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1:
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ldm r0!, {r4,r5,r12,lr}
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ldrd r6, r7, [r1]
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pkhbt r8, r4, r5, lsl #16
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pkhtb r5, r5, r4, asr #16
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pkhbt r4, r12, lr, lsl #16
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pkhtb lr, lr, r12, asr #16
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pld [r1, r2]
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uxtab16 r8, r8, r6
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uxtab16 r5, r5, r6, ror #8
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uxtab16 r4, r4, r7
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uxtab16 lr, lr, r7, ror #8
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usat16 r8, #8, r8
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usat16 r5, #8, r5
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usat16 r4, #8, r4
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usat16 lr, #8, lr
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orr r6, r8, r5, lsl #8
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orr r7, r4, lr, lsl #8
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subs r3, r3, #1
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strd_post r6, r7, r1, r2
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bgt 1b
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pop {r4-r8,pc}
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endfunc
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