forked from KolibriOS/kolibrios
147 lines
4.5 KiB
ArmAsm
147 lines
4.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
|
|
*
|
|
* This file is part of FFmpeg
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/arm/asm.S"
|
|
|
|
function flac_lpc_16_1_arm
|
|
ldr r12, [sp]
|
|
push {r4, lr}
|
|
ldr r1, [r1]
|
|
subs r12, r12, #2
|
|
ldr lr, [r0], #4
|
|
beq 2f
|
|
it lt
|
|
poplt {r4, pc}
|
|
1:
|
|
mul r4, lr, r1
|
|
ldm r0, {r2, lr}
|
|
add_sh r2, r2, r4, asr r3
|
|
mul r4, r2, r1
|
|
subs r12, r12, #2
|
|
add_sh lr, lr, r4, asr r3
|
|
stm r0!, {r2, lr}
|
|
bgt 1b
|
|
it lt
|
|
poplt {r4, pc}
|
|
2:
|
|
mul r4, lr, r1
|
|
ldr r2, [r0]
|
|
add_sh r2, r2, r4, asr r3
|
|
str r2, [r0]
|
|
pop {r4, pc}
|
|
endfunc
|
|
|
|
function flac_lpc_16_2_arm
|
|
ldr r12, [sp]
|
|
subs r12, r12, r2
|
|
it le
|
|
bxle lr
|
|
|
|
push {r4-r9, lr}
|
|
ldm r0!, {r6, r7}
|
|
ldm r1, {r8, r9}
|
|
subs r12, r12, #1
|
|
beq 2f
|
|
1:
|
|
mul r4, r6, r8
|
|
mul r5, r7, r8
|
|
mla r4, r7, r9, r4
|
|
ldm r0, {r6, r7}
|
|
add_sh r6, r6, r4, asr r3
|
|
mla r5, r6, r9, r5
|
|
add_sh r7, r7, r5, asr r3
|
|
stm r0!, {r6, r7}
|
|
subs r12, r12, #2
|
|
bgt 1b
|
|
it lt
|
|
poplt {r4-r9, pc}
|
|
2:
|
|
mul r4, r6, r8
|
|
mla r4, r7, r9, r4
|
|
ldr r5, [r0]
|
|
add_sh r5, r5, r4, asr r3
|
|
str r5, [r0]
|
|
pop {r4-r9, pc}
|
|
endfunc
|
|
|
|
function ff_flac_lpc_16_arm, export=1
|
|
cmp r2, #2
|
|
blt flac_lpc_16_1_arm
|
|
beq flac_lpc_16_2_arm
|
|
|
|
ldr r12, [sp]
|
|
subs r12, r12, r2
|
|
it le
|
|
bxle lr
|
|
|
|
push {r4-r9, lr}
|
|
|
|
subs r12, r12, #1
|
|
beq 3f
|
|
1:
|
|
sub lr, r2, #2
|
|
mov r4, #0
|
|
mov r5, #0
|
|
|
|
ldr r7, [r0], #4
|
|
ldr r9, [r1], #4
|
|
2:
|
|
mla r4, r7, r9, r4
|
|
ldm r0!, {r6, r7}
|
|
mla r5, r6, r9, r5
|
|
ldm r1!, {r8, r9}
|
|
mla r4, r6, r8, r4
|
|
subs lr, lr, #2
|
|
mla r5, r7, r8, r5
|
|
bgt 2b
|
|
blt 6f
|
|
|
|
mla r4, r7, r9, r4
|
|
ldr r7, [r0], #4
|
|
mla r5, r7, r9, r5
|
|
ldr r9, [r1], #4
|
|
6:
|
|
mla r4, r7, r9, r4
|
|
ldm r0, {r6, r7}
|
|
add_sh r6, r6, r4, asr r3
|
|
mla r5, r6, r9, r5
|
|
add_sh r7, r7, r5, asr r3
|
|
stm r0!, {r6, r7}
|
|
sub r0, r0, r2, lsl #2
|
|
sub r1, r1, r2, lsl #2
|
|
|
|
subs r12, r12, #2
|
|
bgt 1b
|
|
it lt
|
|
poplt {r4-r9, pc}
|
|
3:
|
|
mov r4, #0
|
|
4:
|
|
ldr r5, [r1], #4
|
|
ldr r6, [r0], #4
|
|
mla r4, r5, r6, r4
|
|
subs r2, r2, #1
|
|
bgt 4b
|
|
ldr r5, [r0]
|
|
add_sh r5, r5, r4, asr r3
|
|
str r5, [r0]
|
|
pop {r4-r9, pc}
|
|
endfunc
|