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aarch64: NEON vorbis_inverse_coupling

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From the ARMv7 NEON version. 16 times faster as the C version, overall
more than 12% faster vorbis decoding on Apple's A7.
This commit is contained in:
Janne Grunau 2014-04-20 17:57:36 +02:00
parent 8f9fe6ae34
commit 3956a5e0ea
5 changed files with 122 additions and 0 deletions
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3
libavcodec/aarch64/Makefile
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@ -9,6 +9,7 @@ OBJS-$(CONFIG_VIDEODSP) += aarch64/videodsp_init.o
OBJS-$(CONFIG_RV40_DECODER) += aarch64/rv40dsp_init_aarch64.o
OBJS-$(CONFIG_VC1_DECODER) += aarch64/vc1dsp_init_aarch64.o
OBJS-$(CONFIG_VORBIS_DECODER) += aarch64/vorbisdsp_init.o
ARMV8-OBJS-$(CONFIG_VIDEODSP) += aarch64/videodsp.o
@ -21,3 +22,5 @@ NEON-OBJS-$(CONFIG_H264QPEL) += aarch64/h264qpel_neon.o \
NEON-OBJS-$(CONFIG_HPELDSP) += aarch64/hpeldsp_neon.o
NEON-OBJS-$(CONFIG_MPEGAUDIODSP) += aarch64/mpegaudiodsp_neon.o
NEON-OBJS-$(CONFIG_MDCT) += aarch64/mdct_neon.o
NEON-OBJS-$(CONFIG_VORBIS_DECODER) += aarch64/vorbisdsp_neon.o

34
libavcodec/aarch64/vorbisdsp_init.c Normal file
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@ -0,0 +1,34 @@
/*
* 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/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/aarch64/cpu.h"
#include "libavcodec/vorbisdsp.h"
void ff_vorbis_inverse_coupling_neon(float *mag, float *ang,
intptr_t blocksize);
av_cold void ff_vorbisdsp_init_aarch64(VorbisDSPContext *c)
{
int cpu_flags = av_get_cpu_flags();
if (have_neon(cpu_flags)) {
c->vorbis_inverse_coupling = ff_vorbis_inverse_coupling_neon;
}
}

82
libavcodec/aarch64/vorbisdsp_neon.S Normal file
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@ -0,0 +1,82 @@
/*
* 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

2
libavcodec/vorbisdsp.c
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@ -25,6 +25,8 @@ av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
{
dsp->vorbis_inverse_coupling = ff_vorbis_inverse_coupling;
if (ARCH_AARCH64)
ff_vorbisdsp_init_aarch64(dsp);
if (ARCH_ARM)
ff_vorbisdsp_init_arm(dsp);
if (ARCH_PPC)

1
libavcodec/vorbisdsp.h
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@ -30,6 +30,7 @@ typedef struct VorbisDSPContext {
void ff_vorbisdsp_init(VorbisDSPContext *dsp);
/* for internal use only */
void ff_vorbisdsp_init_aarch64(VorbisDSPContext *dsp);
void ff_vorbisdsp_init_x86(VorbisDSPContext *dsp);
void ff_vorbisdsp_init_arm(VorbisDSPContext *dsp);
void ff_vorbisdsp_init_ppc(VorbisDSPContext *dsp);