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/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Janne Grunau
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "src/arm/asm.S"
.macro avg dst, t0, t1
ld1 {\t0\().8h}, [x2], 16
ld1 {\t1\().8h}, [x3], 16
add \t0\().8h, \t0\().8h, \t1\().8h
sqrshrun \dst\().8b, \t0\().8h, #5
.endm
.macro avg16 dst, t0, t1, t2, t3
ld1 {\t0\().8h,\t1\().8h}, [x2], 32
ld1 {\t2\().8h,\t3\().8h}, [x3], 32
add \t0\().8h, \t0\().8h, \t2\().8h
add \t1\().8h, \t1\().8h, \t3\().8h
sqrshrun \dst\().8b, \t0\().8h, #5
sqrshrun2 \dst\().16b, \t1\().8h, #5
.endm
.macro w_avg dst, t0, t1
ld1 {\t0\().8h}, [x2], 16
ld1 {\t1\().8h}, [x3], 16
sub \t0\().8h, \t1\().8h, \t0\().8h
sqdmulh \t0\().8h, \t0\().8h, v30.8h
add \t0\().8h, \t1\().8h, \t0\().8h
sqrshrun \dst\().8b, \t0\().8h, #4
.endm
.macro w_avg16 dst, t0, t1, t2, t3
ld1 {\t0\().8h,\t1\().8h}, [x2], 32
ld1 {\t2\().8h,\t3\().8h}, [x3], 32
sub \t0\().8h, \t2\().8h, \t0\().8h
sub \t1\().8h, \t3\().8h, \t1\().8h
sqdmulh \t0\().8h, \t0\().8h, v30.8h
sqdmulh \t1\().8h, \t1\().8h, v30.8h
add \t0\().8h, \t2\().8h, \t0\().8h
add \t1\().8h, \t3\().8h, \t1\().8h
sqrshrun \dst\().8b, \t0\().8h, #4
sqrshrun2 \dst\().16b, \t1\().8h, #4
.endm
.macro mask dst, t0, t1
ld1 {v30.8b}, [x6], 8
ld1 {\t0\().8h}, [x2], 16
mul v30.8b, v30.8b, v31.8b
ld1 {\t1\().8h}, [x3], 16
shll v30.8h, v30.8b, #8
sub \t0\().8h, \t1\().8h, \t0\().8h
sqdmulh \t0\().8h, \t0\().8h, v30.8h
add \t0\().8h, \t1\().8h, \t0\().8h
sqrshrun \dst\().8b, \t0\().8h, #4
.endm
.macro mask16 dst, t0, t1, t2, t3
ld1 {v30.16b}, [x6], 16
ld1 {\t0\().8h,\t1\().8h}, [x2], 32
mul v30.16b, v30.16b, v31.16b
ld1 {\t2\().8h,\t3\().8h}, [x3], 32
shll v28.8h, v30.8b, #8
shll2 v29.8h, v30.16b, #8
sub \t0\().8h, \t2\().8h, \t0\().8h
sub \t1\().8h, \t3\().8h, \t1\().8h
sqdmulh \t0\().8h, \t0\().8h, v28.8h
sqdmulh \t1\().8h, \t1\().8h, v29.8h
add \t0\().8h, \t2\().8h, \t0\().8h
add \t1\().8h, \t3\().8h, \t1\().8h
sqrshrun \dst\().8b, \t0\().8h, #4
sqrshrun2 \dst\().16b, \t1\().8h, #4
.endm
.macro bidir_fn type
function \type\()_8bpc_neon, export=1
clz w4, w4
.ifc \type, w_avg
dup v30.8h, w6
neg v30.8h, v30.8h
shl v30.8h, v30.8h, #11
.endif
.ifc \type, mask
movi v31.16b, #256-2
.endif
adr x7, L(\type\()_tbl)
sub w4, w4, #24
\type v4, v0, v1
ldrh w4, [x7, x4, lsl #1]
\type v5, v2, v3
sub x7, x7, w4, uxtw
br x7
4:
cmp w5, #4
st1 {v4.s}[0], [x0], x1
st1 {v4.s}[1], [x0], x1
st1 {v5.s}[0], [x0], x1
st1 {v5.s}[1], [x0], x1
b.eq 0f
\type v6, v0, v1
\type v7, v2, v3
cmp w5, #8
st1 {v6.s}[0], [x0], x1
st1 {v6.s}[1], [x0], x1
st1 {v7.s}[0], [x0], x1
st1 {v7.s}[1], [x0], x1
b.eq 0f
\type v4, v0, v1
\type v5, v2, v3
st1 {v4.s}[0], [x0], x1
st1 {v4.s}[1], [x0], x1
\type v6, v0, v1
st1 {v5.s}[0], [x0], x1
st1 {v5.s}[1], [x0], x1
\type v7, v2, v3
st1 {v6.s}[0], [x0], x1
st1 {v6.s}[1], [x0], x1
st1 {v7.s}[0], [x0], x1
st1 {v7.s}[1], [x0], x1
ret
8:
st1 {v4.8b}, [x0], x1
\type v6, v0, v1
st1 {v5.8b}, [x0], x1
\type v7, v0, v1
st1 {v6.8b}, [x0], x1
subs w5, w5, #4
st1 {v7.8b}, [x0], x1
b.le 0f
\type v4, v0, v1
\type v5, v2, v3
b 8b
160:
trn1 v4.2d, v4.2d, v5.2d
16:
\type\()16 v5, v0, v1, v2, v3
st1 {v4.16b}, [x0], x1
\type\()16 v6, v0, v1, v2, v3
st1 {v5.16b}, [x0], x1
\type\()16 v7, v0, v1, v2, v3
st1 {v6.16b}, [x0], x1
subs w5, w5, #4
st1 {v7.16b}, [x0], x1
b.le 0f
\type\()16 v4, v0, v1, v2, v3
b 16b
320:
trn1 v4.2d, v4.2d, v5.2d
add x7, x0, x1
lsl x1, x1, #1
32:
\type\()16 v5, v0, v1, v2, v3
\type\()16 v6, v0, v1, v2, v3
st1 {v4.16b,v5.16b}, [x0], x1
\type\()16 v7, v0, v1, v2, v3
subs w5, w5, #2
st1 {v6.16b,v7.16b}, [x7], x1
b.le 0f
\type\()16 v4, v0, v1, v2, v3
b 32b
640:
trn1 v4.2d, v4.2d, v5.2d
add x7, x0, x1
lsl x1, x1, #1
64:
\type\()16 v5, v0, v1, v2, v3
\type\()16 v6, v0, v1, v2, v3
\type\()16 v7, v0, v1, v2, v3
\type\()16 v16, v0, v1, v2, v3
\type\()16 v17, v0, v1, v2, v3
st1 {v4.16b,v5.16b,v6.16b,v7.16b}, [x0], x1
\type\()16 v18, v0, v1, v2, v3
\type\()16 v19, v0, v1, v2, v3
subs w5, w5, #2
st1 {v16.16b,v17.16b,v18.16b,v19.16b}, [x7], x1
b.le 0f
\type\()16 v4, v0, v1, v2, v3
b 64b
1280:
trn1 v4.2d, v4.2d, v5.2d
add x7, x0, #64
128:
\type\()16 v5, v0, v1, v2, v3
\type\()16 v6, v0, v1, v2, v3
\type\()16 v7, v0, v1, v2, v3
\type\()16 v16, v0, v1, v2, v3
\type\()16 v17, v0, v1, v2, v3
st1 {v4.16b,v5.16b,v6.16b,v7.16b}, [x0], x1
\type\()16 v18, v0, v1, v2, v3
\type\()16 v19, v0, v1, v2, v3
subs w5, w5, #1
st1 {v16.16b,v17.16b,v18.16b,v19.16b}, [x7], x1
b.le 0f
\type\()16 v4, v0, v1, v2, v3
b 128b
0:
ret
L(\type\()_tbl):
.hword L(\type\()_tbl) - 1280b
.hword L(\type\()_tbl) - 640b
.hword L(\type\()_tbl) - 320b
.hword L(\type\()_tbl) - 160b
.hword L(\type\()_tbl) - 8b
.hword L(\type\()_tbl) - 4b
endfunc
.endm
bidir_fn avg
bidir_fn w_avg
bidir_fn mask
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