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77 lines
2.5 KiB
ArmAsm
77 lines
2.5 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_pix_norm1_armv6, export=1
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push {r4-r6, lr}
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mov r12, #16
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mov lr, #0
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1:
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ldm r0, {r2-r5}
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uxtb16 r6, r2
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uxtb16 r2, r2, ror #8
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smlad lr, r6, r6, lr
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uxtb16 r6, r3
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smlad lr, r2, r2, lr
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uxtb16 r3, r3, ror #8
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smlad lr, r6, r6, lr
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uxtb16 r6, r4
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smlad lr, r3, r3, lr
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uxtb16 r4, r4, ror #8
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smlad lr, r6, r6, lr
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uxtb16 r6, r5
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smlad lr, r4, r4, lr
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uxtb16 r5, r5, ror #8
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smlad lr, r6, r6, lr
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subs r12, r12, #1
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add r0, r0, r1
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smlad lr, r5, r5, lr
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bgt 1b
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mov r0, lr
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pop {r4-r6, pc}
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endfunc
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function ff_pix_sum_armv6, export=1
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push {r4-r7, lr}
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mov r12, #16
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mov r2, #0
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mov r3, #0
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mov lr, #0
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ldr r4, [r0]
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1:
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subs r12, r12, #1
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ldr r5, [r0, #4]
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usada8 r2, r4, lr, r2
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ldr r6, [r0, #8]
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usada8 r3, r5, lr, r3
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ldr r7, [r0, #12]
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usada8 r2, r6, lr, r2
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beq 2f
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ldr_pre r4, r0, r1
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usada8 r3, r7, lr, r3
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bgt 1b
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2:
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usada8 r3, r7, lr, r3
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add r0, r2, r3
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pop {r4-r7, pc}
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endfunc
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