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53 lines
1.7 KiB
ArmAsm
53 lines
1.7 KiB
ArmAsm
/*
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* Copyright (c) 2011 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 "asm.S"
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function ff_ac3_compute_mantissa_size_arm, export=1
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push {r4-r8,lr}
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ldm r0, {r4-r8}
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mov r3, r0
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mov r0, #0
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1:
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ldrb lr, [r1], #1
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subs r2, r2, #1
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blt 2f
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cmp lr, #4
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bgt 3f
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subs lr, lr, #1
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addlt r4, r4, #1
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addeq r5, r5, #1
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ble 1b
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subs lr, lr, #2
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addlt r6, r6, #1
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addeq r7, r7, #1
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addgt r8, r8, #1
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b 1b
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3:
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cmp lr, #14
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sublt lr, lr, #1
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addgt r0, r0, #16
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addle r0, r0, lr
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b 1b
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2:
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stm r3, {r4-r8}
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pop {r4-r8,pc}
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endfunc
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