147 lines
4.5 KiB
ArmAsm
147 lines
4.5 KiB
ArmAsm
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/*
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* Copyright (c) 2012 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 flac_lpc_16_1_arm
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ldr r12, [sp]
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push {r4, lr}
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ldr r1, [r1]
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subs r12, r12, #2
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ldr lr, [r0], #4
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beq 2f
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it lt
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poplt {r4, pc}
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1:
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mul r4, lr, r1
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ldm r0, {r2, lr}
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add_sh r2, r2, r4, asr r3
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mul r4, r2, r1
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subs r12, r12, #2
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add_sh lr, lr, r4, asr r3
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stm r0!, {r2, lr}
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bgt 1b
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it lt
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poplt {r4, pc}
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2:
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mul r4, lr, r1
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ldr r2, [r0]
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add_sh r2, r2, r4, asr r3
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str r2, [r0]
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pop {r4, pc}
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endfunc
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function flac_lpc_16_2_arm
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ldr r12, [sp]
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subs r12, r12, r2
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it le
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bxle lr
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push {r4-r9, lr}
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ldm r0!, {r6, r7}
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ldm r1, {r8, r9}
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subs r12, r12, #1
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beq 2f
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1:
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mul r4, r6, r8
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mul r5, r7, r8
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mla r4, r7, r9, r4
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ldm r0, {r6, r7}
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add_sh r6, r6, r4, asr r3
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mla r5, r6, r9, r5
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add_sh r7, r7, r5, asr r3
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stm r0!, {r6, r7}
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subs r12, r12, #2
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bgt 1b
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it lt
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poplt {r4-r9, pc}
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2:
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mul r4, r6, r8
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mla r4, r7, r9, r4
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ldr r5, [r0]
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add_sh r5, r5, r4, asr r3
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str r5, [r0]
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pop {r4-r9, pc}
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endfunc
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function ff_flac_lpc_16_arm, export=1
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cmp r2, #2
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blt flac_lpc_16_1_arm
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beq flac_lpc_16_2_arm
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ldr r12, [sp]
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subs r12, r12, r2
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it le
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bxle lr
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push {r4-r9, lr}
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subs r12, r12, #1
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beq 3f
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1:
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sub lr, r2, #2
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mov r4, #0
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mov r5, #0
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ldr r7, [r0], #4
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ldr r9, [r1], #4
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2:
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mla r4, r7, r9, r4
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ldm r0!, {r6, r7}
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mla r5, r6, r9, r5
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ldm r1!, {r8, r9}
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mla r4, r6, r8, r4
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subs lr, lr, #2
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mla r5, r7, r8, r5
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bgt 2b
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blt 6f
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mla r4, r7, r9, r4
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ldr r7, [r0], #4
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mla r5, r7, r9, r5
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ldr r9, [r1], #4
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6:
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mla r4, r7, r9, r4
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ldm r0, {r6, r7}
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add_sh r6, r6, r4, asr r3
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mla r5, r6, r9, r5
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add_sh r7, r7, r5, asr r3
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stm r0!, {r6, r7}
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sub r0, r0, r2, lsl #2
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sub r1, r1, r2, lsl #2
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subs r12, r12, #2
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bgt 1b
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it lt
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poplt {r4-r9, pc}
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3:
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mov r4, #0
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4:
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ldr r5, [r1], #4
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ldr r6, [r0], #4
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mla r4, r5, r6, r4
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subs r2, r2, #1
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bgt 4b
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ldr r5, [r0]
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add_sh r5, r5, r4, asr r3
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str r5, [r0]
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pop {r4-r9, pc}
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endfunc
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