mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
3956a5e0ea
From the ARMv7 NEON version. 16 times faster as the C version, overall more than 12% faster vorbis decoding on Apple's A7.
83 lines
3.1 KiB
ArmAsm
83 lines
3.1 KiB
ArmAsm
/*
|
|
* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/aarch64/asm.S"
|
|
|
|
function ff_vorbis_inverse_coupling_neon, export=1
|
|
movi v20.4s, #1<<7, lsl #24
|
|
subs x2, x2, #4
|
|
mov x3, x0
|
|
mov x4, x1
|
|
b.eq 3f
|
|
|
|
ld1 {v7.4s}, [x1], #16
|
|
ld1 {v6.4s}, [x0], #16
|
|
cmle v4.4s, v7.4s, #0
|
|
and v5.16b, v6.16b, v20.16b
|
|
eor v7.16b, v7.16b, v5.16b
|
|
and v2.16b, v7.16b, v4.16b
|
|
bic v3.16b, v7.16b, v4.16b
|
|
fadd v7.4s, v6.4s, v2.4s
|
|
fsub v6.4s, v6.4s, v3.4s
|
|
1: ld1 {v1.4s}, [x1], #16
|
|
ld1 {v0.4s}, [x0], #16
|
|
cmle v4.4s, v1.4s, #0
|
|
and v5.16b, v0.16b, v20.16b
|
|
eor v1.16b, v1.16b, v5.16b
|
|
st1 {v7.4s}, [x3], #16
|
|
st1 {v6.4s}, [x4], #16
|
|
and v2.16b, v1.16b, v4.16b
|
|
bic v3.16b, v1.16b, v4.16b
|
|
fadd v1.4s, v0.4s, v2.4s
|
|
fsub v0.4s, v0.4s, v3.4s
|
|
subs x2, x2, #8
|
|
b.le 2f
|
|
ld1 {v7.4s}, [x1], #16
|
|
ld1 {v6.4s}, [x0], #16
|
|
cmle v4.4s, v7.4s, #0
|
|
and v5.16b, v6.16b, v20.16b
|
|
eor v7.16b, v7.16b, v5.16b
|
|
st1 {v1.4s}, [x3], #16
|
|
st1 {v0.4s}, [x4], #16
|
|
and v2.16b, v7.16b, v4.16b
|
|
bic v3.16b, v7.16b, v4.16b
|
|
fadd v7.4s, v6.4s, v2.4s
|
|
fsub v6.4s, v6.4s, v3.4s
|
|
b 1b
|
|
|
|
2: st1 {v1.4s}, [x3], #16
|
|
st1 {v0.4s}, [x4], #16
|
|
b.lt ret
|
|
|
|
3: ld1 {v1.4s}, [x1]
|
|
ld1 {v0.4s}, [x0]
|
|
cmle v4.4s, v1.4s, #0
|
|
and v5.16b, v0.16b, v20.16b
|
|
eor v1.16b, v1.16b, v5.16b
|
|
and v2.16b, v1.16b, v4.16b
|
|
bic v3.16b, v1.16b, v4.16b
|
|
fadd v1.4s, v0.4s, v2.4s
|
|
fsub v0.4s, v0.4s, v3.4s
|
|
st1 {v1.4s}, [x0], #16
|
|
st1 {v0.4s}, [x1], #16
|
|
ret:
|
|
ret
|
|
endfunc
|