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FFmpeg/libavutil/arm/float_dsp_vfp.S
Ben Avison 5a272190a0 armv6: Accelerate butterflies_float 
I benchmarked the result by measuring the number of gperftools samples that
hit anywhere in the AAC decoder (starting from aac_decode_frame()) or
specifically in butterflies_float_c() / ff_butterflies_float_vfp() for the
same sample AAC stream:

                   Before          After
                   Mean   StdDev   Mean   StdDev  Confidence  Change
Audio decode       1542.8 43.7     1470.5 41.5    100.0%      +4.9%
butterflies_float  130.0  11.9     70.2   12.1    100.0%      +85.2%

Signed-off-by: Martin Storsjö <martin@martin.st>
2014-07-18 01:34:38 +03:00

458 lines
15 KiB
ArmAsm
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/*
* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
*
* 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 "config.h"
#include "asm.S"
/**
* Assume that len is a positive number and is multiple of 8
*/
@ void ff_vector_fmul_vfp(float *dst, const float *src0, const float *src1, int len)
function ff_vector_fmul_vfp, export=1
vpush {d8-d15}
fmrx r12, fpscr
orr r12, r12, #(3 << 16) /* set vector size to 4 */
fmxr fpscr, r12
vldmia r1!, {s0-s3}
vldmia r2!, {s8-s11}
vldmia r1!, {s4-s7}
vldmia r2!, {s12-s15}
vmul.f32 s8, s0, s8
1:
subs r3, r3, #16
vmul.f32 s12, s4, s12
itttt ge
vldmiage r1!, {s16-s19}
vldmiage r2!, {s24-s27}
vldmiage r1!, {s20-s23}
vldmiage r2!, {s28-s31}
it ge
vmulge.f32 s24, s16, s24
vstmia r0!, {s8-s11}
vstmia r0!, {s12-s15}
it ge
vmulge.f32 s28, s20, s28
itttt gt
vldmiagt r1!, {s0-s3}
vldmiagt r2!, {s8-s11}
vldmiagt r1!, {s4-s7}
vldmiagt r2!, {s12-s15}
ittt ge
vmulge.f32 s8, s0, s8
vstmiage r0!, {s24-s27}
vstmiage r0!, {s28-s31}
bgt 1b
bic r12, r12, #(7 << 16) /* set vector size back to 1 */
fmxr fpscr, r12
vpop {d8-d15}
bx lr
endfunc
/**
* ARM VFP implementation of 'vector_fmul_window_c' function
* Assume that len is a positive non-zero number
*/
@ void ff_vector_fmul_window_vfp(float *dst, const float *src0,
@ const float *src1, const float *win, int len)
function ff_vector_fmul_window_vfp, export=1
DST0 .req a1
SRC0 .req a2
SRC1 .req a3
WIN0 .req a4
LEN .req v1
DST1 .req v2
WIN1 .req v3
OLDFPSCR .req ip
push {v1-v3,lr}
ldr LEN, [sp, #4*4+0]
vpush {s16-s31}
fmrx OLDFPSCR, FPSCR
add DST1, DST0, LEN, lsl #3
add SRC1, SRC1, LEN, lsl #2
add WIN1, WIN0, LEN, lsl #3
tst LEN, #7
beq 4f @ common case: len is a multiple of 8
ldr lr, =0x03000000 @ RunFast mode, scalar mode
fmxr FPSCR, lr
tst LEN, #1
beq 1f
vldmdb WIN1!, {s0}
vldmia SRC0!, {s8}
vldmia WIN0!, {s16}
vmul.f s24, s0, s8
vldmdb SRC1!, {s20}
vmul.f s8, s16, s8
vmls.f s24, s16, s20
vmla.f s8, s0, s20
vstmia DST0!, {s24}
vstmdb DST1!, {s8}
1:
tst LEN, #2
beq 2f
vldmdb WIN1!, {s0}
vldmdb WIN1!, {s1}
vldmia SRC0!, {s8-s9}
vldmia WIN0!, {s16-s17}
vmul.f s24, s0, s8
vmul.f s25, s1, s9
vldmdb SRC1!, {s20}
vldmdb SRC1!, {s21}
vmul.f s8, s16, s8
vmul.f s9, s17, s9
vmls.f s24, s16, s20
vmls.f s25, s17, s21
vmla.f s8, s0, s20
vmla.f s9, s1, s21
vstmia DST0!, {s24-s25}
vstmdb DST1!, {s8}
vstmdb DST1!, {s9}
2:
tst LEN, #4
beq 3f
vldmdb WIN1!, {s0}
vldmdb WIN1!, {s1}
vldmdb WIN1!, {s2}
vldmdb WIN1!, {s3}
vldmia SRC0!, {s8-s11}
vldmia WIN0!, {s16-s19}
vmul.f s24, s0, s8
vmul.f s25, s1, s9
vmul.f s26, s2, s10
vmul.f s27, s3, s11
vldmdb SRC1!, {s20}
vldmdb SRC1!, {s21}
vldmdb SRC1!, {s22}
vldmdb SRC1!, {s23}
vmul.f s8, s16, s8
vmul.f s9, s17, s9
vmul.f s10, s18, s10
vmul.f s11, s19, s11
vmls.f s24, s16, s20
vmls.f s25, s17, s21
vmls.f s26, s18, s22
vmls.f s27, s19, s23
vmla.f s8, s0, s20
vmla.f s9, s1, s21
vmla.f s10, s2, s22
vmla.f s11, s3, s23
vstmia DST0!, {s24-s27}
vstmdb DST1!, {s8}
vstmdb DST1!, {s9}
vstmdb DST1!, {s10}
vstmdb DST1!, {s11}
3:
bics LEN, LEN, #7
beq 7f
4:
ldr lr, =0x03030000 @ RunFast mode, short vectors of length 4, stride 1
fmxr FPSCR, lr
vldmdb WIN1!, {s0}
vldmdb WIN1!, {s1}
vldmdb WIN1!, {s2}
vldmdb WIN1!, {s3}
vldmia SRC0!, {s8-s11}
vldmia WIN0!, {s16-s19}
vmul.f s24, s0, s8 @ vector * vector
vldmdb SRC1!, {s20}
vldmdb SRC1!, {s21}
vldmdb SRC1!, {s22}
vldmdb SRC1!, {s23}
vmul.f s8, s16, s8 @ vector * vector
vmls.f s24, s16, s20 @ vector * vector
vldmdb WIN1!, {s4}
vldmdb WIN1!, {s5}
vldmdb WIN1!, {s6}
vldmdb WIN1!, {s7}
vldmia SRC0!, {s12-s13}
vmla.f s8, s0, s20 @ vector * vector
vldmia SRC0!, {s14-s15}
subs LEN, LEN, #8
beq 6f
5: vldmia WIN0!, {s20-s23}
vmul.f s28, s4, s12 @ vector * vector
vstmia DST0!, {s24-s25}
vldmdb SRC1!, {s16}
vldmdb SRC1!, {s17}
vldmdb SRC1!, {s18}
vldmdb SRC1!, {s19}
vmul.f s12, s20, s12 @ vector * vector
vstmia DST0!, {s26-s27}
vstmdb DST1!, {s8}
vstmdb DST1!, {s9}
vstmdb DST1!, {s10}
vstmdb DST1!, {s11}
vmls.f s28, s20, s16 @ vector * vector
vldmdb WIN1!, {s0}
vldmdb WIN1!, {s1}
vldmdb WIN1!, {s2}
vldmdb WIN1!, {s3}
vldmia SRC0!, {s8-s9}
vmla.f s12, s4, s16 @ vector * vector
vldmia SRC0!, {s10-s11}
subs LEN, LEN, #8
vldmia WIN0!, {s16-s19}
vmul.f s24, s0, s8 @ vector * vector
vstmia DST0!, {s28-s29}
vldmdb SRC1!, {s20}
vldmdb SRC1!, {s21}
vldmdb SRC1!, {s22}
vldmdb SRC1!, {s23}
vmul.f s8, s16, s8 @ vector * vector
vstmia DST0!, {s30-s31}
vstmdb DST1!, {s12}
vstmdb DST1!, {s13}
vstmdb DST1!, {s14}
vstmdb DST1!, {s15}
vmls.f s24, s16, s20 @ vector * vector
vldmdb WIN1!, {s4}
vldmdb WIN1!, {s5}
vldmdb WIN1!, {s6}
vldmdb WIN1!, {s7}
vldmia SRC0!, {s12-s13}
vmla.f s8, s0, s20 @ vector * vector
vldmia SRC0!, {s14-s15}
bne 5b
6: vldmia WIN0!, {s20-s23}
vmul.f s28, s4, s12 @ vector * vector
vstmia DST0!, {s24-s25}
vldmdb SRC1!, {s16}
vldmdb SRC1!, {s17}
vldmdb SRC1!, {s18}
vldmdb SRC1!, {s19}
vmul.f s12, s20, s12 @ vector * vector
vstmia DST0!, {s26-s27}
vstmdb DST1!, {s8}
vstmdb DST1!, {s9}
vstmdb DST1!, {s10}
vstmdb DST1!, {s11}
vmls.f s28, s20, s16 @ vector * vector
vmla.f s12, s4, s16 @ vector * vector
vstmia DST0!, {s28-s31}
vstmdb DST1!, {s12}
vstmdb DST1!, {s13}
vstmdb DST1!, {s14}
vstmdb DST1!, {s15}
7:
fmxr FPSCR, OLDFPSCR
vpop {s16-s31}
pop {v1-v3,pc}
.unreq DST0
.unreq SRC0
.unreq SRC1
.unreq WIN0
.unreq LEN
.unreq OLDFPSCR
.unreq DST1
.unreq WIN1
endfunc
/**
* ARM VFP optimized implementation of 'vector_fmul_reverse_c' function.
* Assume that len is a positive number and is multiple of 8
*/
@ void ff_vector_fmul_reverse_vfp(float *dst, const float *src0,
@ const float *src1, int len)
function ff_vector_fmul_reverse_vfp, export=1
vpush {d8-d15}
add r2, r2, r3, lsl #2
vldmdb r2!, {s0-s3}
vldmia r1!, {s8-s11}
vldmdb r2!, {s4-s7}
vldmia r1!, {s12-s15}
vmul.f32 s8, s3, s8
vmul.f32 s9, s2, s9
vmul.f32 s10, s1, s10
vmul.f32 s11, s0, s11
1:
subs r3, r3, #16
it ge
vldmdbge r2!, {s16-s19}
vmul.f32 s12, s7, s12
it ge
vldmiage r1!, {s24-s27}
vmul.f32 s13, s6, s13
it ge
vldmdbge r2!, {s20-s23}
vmul.f32 s14, s5, s14
it ge
vldmiage r1!, {s28-s31}
vmul.f32 s15, s4, s15
it ge
vmulge.f32 s24, s19, s24
it gt
vldmdbgt r2!, {s0-s3}
it ge
vmulge.f32 s25, s18, s25
vstmia r0!, {s8-s13}
it ge
vmulge.f32 s26, s17, s26
it gt
vldmiagt r1!, {s8-s11}
itt ge
vmulge.f32 s27, s16, s27
vmulge.f32 s28, s23, s28
it gt
vldmdbgt r2!, {s4-s7}
it ge
vmulge.f32 s29, s22, s29
vstmia r0!, {s14-s15}
ittt ge
vmulge.f32 s30, s21, s30
vmulge.f32 s31, s20, s31
vmulge.f32 s8, s3, s8
it gt
vldmiagt r1!, {s12-s15}
itttt ge
vmulge.f32 s9, s2, s9
vmulge.f32 s10, s1, s10
vstmiage r0!, {s24-s27}
vmulge.f32 s11, s0, s11
it ge
vstmiage r0!, {s28-s31}
bgt 1b
vpop {d8-d15}
bx lr
endfunc
/**
* ARM VFP implementation of 'butterflies_float_c' function
* Assume that len is a positive non-zero number
*/
@ void ff_butterflies_float_vfp(float *restrict v1, float *restrict v2, int len)
function ff_butterflies_float_vfp, export=1
BASE1 .req a1
BASE2 .req a2
LEN .req a3
OLDFPSCR .req a4
vpush {s16-s31}
fmrx OLDFPSCR, FPSCR
tst LEN, #7
beq 4f @ common case: len is a multiple of 8
ldr ip, =0x03000000 @ RunFast mode, scalar mode
fmxr FPSCR, ip
tst LEN, #1
beq 1f
vldmia BASE1!, {s0}
vldmia BASE2!, {s8}
vadd.f s16, s0, s8
vsub.f s24, s0, s8
vstr s16, [BASE1, #0-4*1]
vstr s24, [BASE2, #0-4*1]
1:
tst LEN, #2
beq 2f
vldmia BASE1!, {s0-s1}
vldmia BASE2!, {s8-s9}
vadd.f s16, s0, s8
vadd.f s17, s1, s9
vsub.f s24, s0, s8
vsub.f s25, s1, s9
vstr d8, [BASE1, #0-8*1] @ s16,s17
vstr d12, [BASE2, #0-8*1] @ s24,s25
2:
tst LEN, #4
beq 3f
vldmia BASE1!, {s0-s1}
vldmia BASE2!, {s8-s9}
vldmia BASE1!, {s2-s3}
vldmia BASE2!, {s10-s11}
vadd.f s16, s0, s8
vadd.f s17, s1, s9
vsub.f s24, s0, s8
vsub.f s25, s1, s9
vadd.f s18, s2, s10
vadd.f s19, s3, s11
vsub.f s26, s2, s10
vsub.f s27, s3, s11
vstr d8, [BASE1, #0-16*1] @ s16,s17
vstr d12, [BASE2, #0-16*1] @ s24,s25
vstr d9, [BASE1, #8-16*1] @ s18,s19
vstr d13, [BASE2, #8-16*1] @ s26,s27
3:
bics LEN, LEN, #7
beq 7f
4:
ldr ip, =0x03030000 @ RunFast mode, short vectors of length 4, stride 1
fmxr FPSCR, ip
vldmia BASE1!, {s0-s1}
vldmia BASE2!, {s8-s9}
vldmia BASE1!, {s2-s3}
vldmia BASE2!, {s10-s11}
vadd.f s16, s0, s8
vldmia BASE1!, {s4-s5}
vldmia BASE2!, {s12-s13}
vldmia BASE1!, {s6-s7}
vldmia BASE2!, {s14-s15}
vsub.f s24, s0, s8
vadd.f s20, s4, s12
subs LEN, LEN, #8
beq 6f
5: vldmia BASE1!, {s0-s3}
vldmia BASE2!, {s8-s11}
vsub.f s28, s4, s12
vstr d8, [BASE1, #0-16*3] @ s16,s17
vstr d9, [BASE1, #8-16*3] @ s18,s19
vstr d12, [BASE2, #0-16*3] @ s24,s25
vstr d13, [BASE2, #8-16*3] @ s26,s27
vadd.f s16, s0, s8
vldmia BASE1!, {s4-s7}
vldmia BASE2!, {s12-s15}
vsub.f s24, s0, s8
vstr d10, [BASE1, #0-16*3] @ s20,s21
vstr d11, [BASE1, #8-16*3] @ s22,s23
vstr d14, [BASE2, #0-16*3] @ s28,s29
vstr d15, [BASE2, #8-16*3] @ s30,s31
vadd.f s20, s4, s12
subs LEN, LEN, #8
bne 5b
6: vsub.f s28, s4, s12
vstr d8, [BASE1, #0-16*2] @ s16,s17
vstr d9, [BASE1, #8-16*2] @ s18,s19
vstr d12, [BASE2, #0-16*2] @ s24,s25
vstr d13, [BASE2, #8-16*2] @ s26,s27
vstr d10, [BASE1, #0-16*1] @ s20,s21
vstr d11, [BASE1, #8-16*1] @ s22,s23
vstr d14, [BASE2, #0-16*1] @ s28,s29
vstr d15, [BASE2, #8-16*1] @ s30,s31
7:
fmxr FPSCR, OLDFPSCR
vpop {s16-s31}
bx lr
.unreq BASE1
.unreq BASE2
.unreq LEN
.unreq OLDFPSCR
endfunc
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