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77 lines
2.6 KiB
ArmAsm
77 lines
2.6 KiB
ArmAsm
/*
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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_get_pixels_armv6, export=1
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pld [r1, r2]
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push {r4-r8, lr}
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mov lr, #8
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1:
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ldrd_post r4, r5, r1, r2
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subs lr, lr, #1
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uxtb16 r6, r4
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uxtb16 r4, r4, ror #8
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uxtb16 r12, r5
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uxtb16 r8, r5, ror #8
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pld [r1, r2]
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pkhbt r5, r6, r4, lsl #16
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pkhtb r6, r4, r6, asr #16
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pkhbt r7, r12, r8, lsl #16
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pkhtb r12, r8, r12, asr #16
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stm r0!, {r5,r6,r7,r12}
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bgt 1b
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pop {r4-r8, pc}
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endfunc
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function ff_diff_pixels_armv6, export=1
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pld [r1, r3]
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pld [r2, r3]
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push {r4-r9, lr}
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mov lr, #8
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1:
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ldrd_post r4, r5, r1, r3
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ldrd_post r6, r7, r2, r3
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uxtb16 r8, r4
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uxtb16 r4, r4, ror #8
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uxtb16 r9, r6
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uxtb16 r6, r6, ror #8
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pld [r1, r3]
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ssub16 r9, r8, r9
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ssub16 r6, r4, r6
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uxtb16 r8, r5
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uxtb16 r5, r5, ror #8
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pld [r2, r3]
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pkhbt r4, r9, r6, lsl #16
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pkhtb r6, r6, r9, asr #16
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uxtb16 r9, r7
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uxtb16 r7, r7, ror #8
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ssub16 r9, r8, r9
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ssub16 r5, r5, r7
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subs lr, lr, #1
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pkhbt r8, r9, r5, lsl #16
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pkhtb r9, r5, r9, asr #16
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stm r0!, {r4,r6,r8,r9}
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bgt 1b
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pop {r4-r9, pc}
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endfunc
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