shithub: dav1d

ref: 41e64ac1f8762167b3d3787bc9649ca26ace2386
dir: /src/arm/64/mc.S/

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/*
 * Copyright © 2018, VideoLAN and dav1d authors
 * Copyright © 2018, Janne Grunau
 * Copyright © 2018, Martin Storsjo
 * 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"
#include "src/arm/64/util.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


// This has got the same signature as the put_8tap functions,
// and assumes that x8 is set to (24-clz(w)).
function put
        adr             x9,  L(put_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

2:
        ld1             {v0.h}[0], [x2], x3
        ld1             {v1.h}[0], [x2], x3
        subs            w5,  w5,  #2
        st1             {v0.h}[0], [x0], x1
        st1             {v1.h}[0], [x0], x1
        b.gt            2b
        ret
4:
        ld1             {v0.s}[0], [x2], x3
        ld1             {v1.s}[0], [x2], x3
        subs            w5,  w5,  #2
        st1             {v0.s}[0], [x0], x1
        st1             {v1.s}[0], [x0], x1
        b.gt            4b
        ret
8:
        ld1             {v0.8b}, [x2], x3
        ld1             {v1.8b}, [x2], x3
        subs            w5,  w5,  #2
        st1             {v0.8b}, [x0], x1
        st1             {v1.8b}, [x0], x1
        b.gt            8b
        ret
160:
        add             x8,  x0,  x1
        lsl             x1,  x1,  #1
        add             x9,  x2,  x3
        lsl             x3,  x3,  #1
16:
        ld1             {v0.16b}, [x2], x3
        ld1             {v1.16b}, [x9], x3
        subs            w5,  w5,  #2
        st1             {v0.16b}, [x0], x1
        st1             {v1.16b}, [x8], x1
        b.gt            16b
        ret
32:
        ldp             x6,  x7,  [x2]
        ldp             x8,  x9,  [x2, #16]
        stp             x6,  x7,  [x0]
        subs            w5,  w5,  #1
        stp             x8,  x9,  [x0, #16]
        add             x2,  x2,  x3
        add             x0,  x0,  x1
        b.gt            32b
        ret
64:
        ldp             x6,  x7,  [x2]
        ldp             x8,  x9,  [x2, #16]
        stp             x6,  x7,  [x0]
        ldp             x10, x11, [x2, #32]
        stp             x8,  x9,  [x0, #16]
        subs            w5,  w5,  #1
        ldp             x12, x13, [x2, #48]
        stp             x10, x11, [x0, #32]
        stp             x12, x13, [x0, #48]
        add             x2,  x2,  x3
        add             x0,  x0,  x1
        b.gt            64b
        ret
128:
        ldp             q0,  q1,  [x2]
        ldp             q2,  q3,  [x2, #32]
        stp             q0,  q1,  [x0]
        ldp             q4,  q5,  [x2, #64]
        stp             q2,  q3,  [x0, #32]
        ldp             q6,  q7,  [x2, #96]
        subs            w5,  w5,  #1
        stp             q4,  q5,  [x0, #64]
        stp             q6,  q7,  [x0, #96]
        add             x2,  x2,  x3
        add             x0,  x0,  x1
        b.gt            128b
        ret

L(put_tbl):
        .hword L(put_tbl) - 128b
        .hword L(put_tbl) -  64b
        .hword L(put_tbl) -  32b
        .hword L(put_tbl) - 160b
        .hword L(put_tbl) -   8b
        .hword L(put_tbl) -   4b
        .hword L(put_tbl) -   2b
endfunc


// This has got the same signature as the prep_8tap functions,
// and assumes that x8 is set to (24-clz(w)), and x7 to w*2.
function prep
        adr             x9,  L(prep_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

4:
        ld1             {v0.s}[0], [x1], x2
        ld1             {v1.s}[0], [x1], x2
        subs            w4,  w4,  #2
        ushll           v0.8h, v0.8b, #4
        ushll           v1.8h, v1.8b, #4
        st1             {v0.4h, v1.4h}, [x0], #16
        b.gt            4b
        ret
8:
        ld1             {v0.8b}, [x1], x2
        ld1             {v1.8b}, [x1], x2
        subs            w4,  w4,  #2
        ushll           v0.8h, v0.8b, #4
        ushll           v1.8h, v1.8b, #4
        st1             {v0.8h, v1.8h}, [x0], #32
        b.gt            8b
        ret
160:
        add             x9,  x1,  x2
        lsl             x2,  x2,  #1
16:
        ld1             {v0.16b}, [x1], x2
        ld1             {v1.16b}, [x9], x2
        subs            w4,  w4,  #2
        ushll           v4.8h, v0.8b,  #4
        ushll2          v5.8h, v0.16b, #4
        ushll           v6.8h, v1.8b,  #4
        ushll2          v7.8h, v1.16b, #4
        st1             {v4.8h, v5.8h, v6.8h, v7.8h}, [x0], #64
        b.gt            16b
        ret
320:
        add             x8,  x0,  w3, uxtw
32:
        ld1             {v0.16b, v1.16b},  [x1], x2
        subs            w4,  w4,  #2
        ushll           v4.8h,  v0.8b,  #4
        ushll2          v5.8h,  v0.16b, #4
        ld1             {v2.16b, v3.16b},  [x1], x2
        ushll           v6.8h,  v1.8b,  #4
        ushll2          v7.8h,  v1.16b, #4
        ushll           v16.8h, v2.8b,  #4
        st1             {v4.8h,  v5.8h},  [x0], x7
        ushll2          v17.8h, v2.16b, #4
        st1             {v6.8h,  v7.8h},  [x8], x7
        ushll           v18.8h, v3.8b,  #4
        st1             {v16.8h, v17.8h}, [x0], x7
        ushll2          v19.8h, v3.16b, #4
        st1             {v18.8h, v19.8h}, [x8], x7
        b.gt            32b
        ret
640:
        add             x8,  x0,  #32
        mov             x6,  #64
64:
        ldp             q0,  q1,  [x1]
        subs            w4,  w4,  #1
        ushll           v4.8h,  v0.8b,  #4
        ushll2          v5.8h,  v0.16b, #4
        ldp             q2,  q3,  [x1, #32]
        ushll           v6.8h,  v1.8b,  #4
        ushll2          v7.8h,  v1.16b, #4
        add             x1,  x1,  x2
        ushll           v16.8h, v2.8b,  #4
        st1             {v4.8h,  v5.8h},  [x0], x6
        ushll2          v17.8h, v2.16b, #4
        ushll           v18.8h, v3.8b,  #4
        st1             {v6.8h,  v7.8h},  [x8], x6
        ushll2          v19.8h, v3.16b, #4
        st1             {v16.8h, v17.8h}, [x0], x6
        st1             {v18.8h, v19.8h}, [x8], x6
        b.gt            64b
        ret
1280:
        add             x8,  x0,  #64
        mov             x6,  #128
128:
        ldp             q0,  q1,  [x1]
        ldp             q2,  q3,  [x1, #32]
        ushll           v16.8h,  v0.8b,  #4
        ushll2          v17.8h,  v0.16b, #4
        ushll           v18.8h,  v1.8b,  #4
        ushll2          v19.8h,  v1.16b, #4
        ushll           v20.8h,  v2.8b,  #4
        ushll2          v21.8h,  v2.16b, #4
        ldp             q4,  q5,  [x1, #64]
        st1             {v16.8h, v17.8h, v18.8h, v19.8h}, [x0], x6
        ushll           v22.8h,  v3.8b,  #4
        ushll2          v23.8h,  v3.16b, #4
        ushll           v24.8h,  v4.8b,  #4
        ushll2          v25.8h,  v4.16b, #4
        ushll           v26.8h,  v5.8b,  #4
        ushll2          v27.8h,  v5.16b, #4
        ldp             q6,  q7,  [x1, #96]
        st1             {v20.8h, v21.8h, v22.8h, v23.8h}, [x8], x6
        ushll           v28.8h,  v6.8b,  #4
        ushll2          v29.8h,  v6.16b, #4
        ushll           v30.8h,  v7.8b,  #4
        ushll2          v31.8h,  v7.16b, #4
        subs            w4,  w4,  #1
        add             x1,  x1,  x2
        st1             {v24.8h, v25.8h, v26.8h, v27.8h}, [x0], x6
        st1             {v28.8h, v29.8h, v30.8h, v31.8h}, [x8], x6
        b.gt            128b
        ret

L(prep_tbl):
        .hword L(prep_tbl) - 1280b
        .hword L(prep_tbl) -  640b
        .hword L(prep_tbl) -  320b
        .hword L(prep_tbl) -  160b
        .hword L(prep_tbl) -    8b
        .hword L(prep_tbl) -    4b
endfunc


.macro load_slice s0, s1, strd, wd, d0, d1, d2, d3, d4, d5, d6
        ld1             {\d0\wd}[0], [\s0], \strd
        ld1             {\d1\wd}[0], [\s1], \strd
.ifnb \d2
        ld1             {\d2\wd}[0], [\s0], \strd
        ld1             {\d3\wd}[0], [\s1], \strd
.endif
.ifnb \d4
        ld1             {\d4\wd}[0], [\s0], \strd
.endif
.ifnb \d5
        ld1             {\d5\wd}[0], [\s1], \strd
.endif
.ifnb \d6
        ld1             {\d6\wd}[0], [\s0], \strd
.endif
.endm
.macro load_reg s0, s1, strd, wd, d0, d1, d2, d3, d4, d5, d6
        ld1             {\d0\wd}, [\s0], \strd
        ld1             {\d1\wd}, [\s1], \strd
.ifnb \d2
        ld1             {\d2\wd}, [\s0], \strd
        ld1             {\d3\wd}, [\s1], \strd
.endif
.ifnb \d4
        ld1             {\d4\wd}, [\s0], \strd
.endif
.ifnb \d5
        ld1             {\d5\wd}, [\s1], \strd
.endif
.ifnb \d6
        ld1             {\d6\wd}, [\s0], \strd
.endif
.endm
.macro load_h s0, s1, strd, d0, d1, d2, d3, d4, d5, d6
        load_slice      \s0, \s1, \strd, .h, \d0, \d1, \d2, \d3, \d4, \d5, \d6
.endm
.macro load_s s0, s1, strd, d0, d1, d2, d3, d4, d5, d6
        load_slice      \s0, \s1, \strd, .s, \d0, \d1, \d2, \d3, \d4, \d5, \d6
.endm
.macro load_8b s0, s1, strd, d0, d1, d2, d3, d4, d5, d6
        load_reg        \s0, \s1, \strd, .8b, \d0, \d1, \d2, \d3, \d4, \d5, \d6
.endm
.macro load_16b s0, s1, strd, d0, d1, d2, d3, d4, d5, d6
        load_reg        \s0, \s1, \strd, .16b, \d0, \d1, \d2, \d3, \d4, \d5, \d6
.endm
.macro interleave_1 wd, r0, r1, r2, r3, r4
        trn1            \r0\wd, \r0\wd, \r1\wd
        trn1            \r1\wd, \r1\wd, \r2\wd
.ifnb \r3
        trn1            \r2\wd, \r2\wd, \r3\wd
        trn1            \r3\wd, \r3\wd, \r4\wd
.endif
.endm
.macro interleave_1_h r0, r1, r2, r3, r4
        interleave_1    .4h, \r0, \r1, \r2, \r3, \r4
.endm
.macro interleave_1_s r0, r1, r2, r3, r4
        interleave_1    .2s, \r0, \r1, \r2, \r3, \r4
.endm
.macro interleave_2 wd, r0, r1, r2, r3, r4, r5
        trn1            \r0\wd,  \r0\wd, \r2\wd
        trn1            \r1\wd,  \r1\wd, \r3\wd
        trn1            \r2\wd,  \r2\wd, \r4\wd
        trn1            \r3\wd,  \r3\wd, \r5\wd
.endm
.macro interleave_2_s r0, r1, r2, r3, r4, r5
        interleave_2    .2s, \r0, \r1, \r2, \r3, \r4, \r5
.endm
.macro uxtl_b r0, r1, r2, r3, r4, r5, r6
        uxtl            \r0\().8h, \r0\().8b
        uxtl            \r1\().8h, \r1\().8b
.ifnb \r2
        uxtl            \r2\().8h, \r2\().8b
        uxtl            \r3\().8h, \r3\().8b
.endif
.ifnb \r4
        uxtl            \r4\().8h, \r4\().8b
.endif
.ifnb \r5
        uxtl            \r5\().8h, \r5\().8b
.endif
.ifnb \r6
        uxtl            \r6\().8h, \r6\().8b
.endif
.endm
.macro mul_mla_4 d, s0, s1, s2, s3, wd
        mul             \d\wd,  \s0\wd,  v0.h[0]
        mla             \d\wd,  \s1\wd,  v0.h[1]
        mla             \d\wd,  \s2\wd,  v0.h[2]
        mla             \d\wd,  \s3\wd,  v0.h[3]
.endm
.macro mul_mla_8_1 d0, d1, s0, s1, s2, s3, s4, s5, s6, s7, s8
        mul             \d0\().8h, \s0\().8h, v0.h[0]
        mul             \d1\().8h, \s1\().8h, v0.h[0]
        mla             \d0\().8h, \s1\().8h, v0.h[1]
        mla             \d1\().8h, \s2\().8h, v0.h[1]
        mla             \d0\().8h, \s2\().8h, v0.h[2]
        mla             \d1\().8h, \s3\().8h, v0.h[2]
        mla             \d0\().8h, \s3\().8h, v0.h[3]
        mla             \d1\().8h, \s4\().8h, v0.h[3]
        mla             \d0\().8h, \s4\().8h, v0.h[4]
        mla             \d1\().8h, \s5\().8h, v0.h[4]
        mla             \d0\().8h, \s5\().8h, v0.h[5]
        mla             \d1\().8h, \s6\().8h, v0.h[5]
        mla             \d0\().8h, \s6\().8h, v0.h[6]
        mla             \d1\().8h, \s7\().8h, v0.h[6]
        mla             \d0\().8h, \s7\().8h, v0.h[7]
        mla             \d1\().8h, \s8\().8h, v0.h[7]
.endm
.macro mul_mla_8_2 d0, d1, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9
        mul             \d0\().8h, \s0\().8h, v0.h[0]
        mul             \d1\().8h, \s2\().8h, v0.h[0]
        mla             \d0\().8h, \s1\().8h, v0.h[1]
        mla             \d1\().8h, \s3\().8h, v0.h[1]
        mla             \d0\().8h, \s2\().8h, v0.h[2]
        mla             \d1\().8h, \s4\().8h, v0.h[2]
        mla             \d0\().8h, \s3\().8h, v0.h[3]
        mla             \d1\().8h, \s5\().8h, v0.h[3]
        mla             \d0\().8h, \s4\().8h, v0.h[4]
        mla             \d1\().8h, \s6\().8h, v0.h[4]
        mla             \d0\().8h, \s5\().8h, v0.h[5]
        mla             \d1\().8h, \s7\().8h, v0.h[5]
        mla             \d0\().8h, \s6\().8h, v0.h[6]
        mla             \d1\().8h, \s8\().8h, v0.h[6]
        mla             \d0\().8h, \s7\().8h, v0.h[7]
        mla             \d1\().8h, \s9\().8h, v0.h[7]
.endm
.macro mul_mla_8_4 d0, d1, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11
        mul             \d0\().8h, \s0\().8h,  v0.h[0]
        mul             \d1\().8h, \s4\().8h,  v0.h[0]
        mla             \d0\().8h, \s1\().8h,  v0.h[1]
        mla             \d1\().8h, \s5\().8h,  v0.h[1]
        mla             \d0\().8h, \s2\().8h,  v0.h[2]
        mla             \d1\().8h, \s6\().8h,  v0.h[2]
        mla             \d0\().8h, \s3\().8h,  v0.h[3]
        mla             \d1\().8h, \s7\().8h,  v0.h[3]
        mla             \d0\().8h, \s4\().8h,  v0.h[4]
        mla             \d1\().8h, \s8\().8h,  v0.h[4]
        mla             \d0\().8h, \s5\().8h,  v0.h[5]
        mla             \d1\().8h, \s9\().8h,  v0.h[5]
        mla             \d0\().8h, \s6\().8h,  v0.h[6]
        mla             \d1\().8h, \s10\().8h, v0.h[6]
        mla             \d0\().8h, \s7\().8h,  v0.h[7]
        mla             \d1\().8h, \s11\().8h, v0.h[7]
.endm
.macro sqrshrun_b shift, r0, r1, r2, r3
        sqrshrun        \r0\().8b, \r0\().8h,  #\shift
.ifnb \r1
        sqrshrun        \r1\().8b, \r1\().8h,  #\shift
.endif
.ifnb \r2
        sqrshrun        \r2\().8b, \r2\().8h,  #\shift
        sqrshrun        \r3\().8b, \r3\().8h,  #\shift
.endif
.endm
.macro srshr_h shift, r0, r1, r2, r3
        srshr           \r0\().8h, \r0\().8h,  #\shift
.ifnb \r1
        srshr           \r1\().8h, \r1\().8h,  #\shift
.endif
.ifnb \r2
        srshr           \r2\().8h, \r2\().8h,  #\shift
        srshr           \r3\().8h, \r3\().8h,  #\shift
.endif
.endm
.macro st_h strd, reg, lanes
        st1             {\reg\().h}[0], [x0], \strd
        st1             {\reg\().h}[1], [x8], \strd
.if \lanes > 2
        st1             {\reg\().h}[2], [x0], \strd
        st1             {\reg\().h}[3], [x8], \strd
.endif
.endm
.macro st_s strd, r0, r1, r2, r3
        st1             {\r0\().s}[0], [x0], \strd
        st1             {\r0\().s}[1], [x8], \strd
.ifnb \r1
        st1             {\r1\().s}[0], [x0], \strd
        st1             {\r1\().s}[1], [x8], \strd
.endif
.endm
.macro st_d strd, r0, r1, r2, r3
        st1             {\r0\().d}[0], [x0], \strd
        st1             {\r0\().d}[1], [x8], \strd
.ifnb \r1
        st1             {\r1\().d}[0], [x0], \strd
        st1             {\r1\().d}[1], [x8], \strd
.endif
.endm
.macro shift_store_4 type, strd, r0, r1, r2, r3
.ifc \type, put
        sqrshrun_b      6,     \r0, \r1, \r2, \r3
        st_s            \strd, \r0, \r1, \r2, \r3
.else
        srshr_h         2,     \r0, \r1, \r2, \r3
        st_d            \strd, \r0, \r1, \r2, \r3
.endif
.endm
.macro st_reg strd, wd, r0, r1, r2, r3, r4, r5, r6, r7
        st1             {\r0\wd}, [x0], \strd
        st1             {\r1\wd}, [x8], \strd
.ifnb \r2
        st1             {\r2\wd}, [x0], \strd
        st1             {\r3\wd}, [x8], \strd
.endif
.ifnb \r4
        st1             {\r4\wd}, [x0], \strd
        st1             {\r5\wd}, [x8], \strd
        st1             {\r6\wd}, [x0], \strd
        st1             {\r7\wd}, [x8], \strd
.endif
.endm
.macro st_8b strd, r0, r1, r2, r3, r4, r5, r6, r7
        st_reg          \strd, .8b,  \r0, \r1, \r2, \r3, \r4, \r5, \r6, \r7
.endm
.macro st_16b strd, r0, r1, r2, r3, r4, r5, r6, r7
        st_reg          \strd, .16b, \r0, \r1, \r2, \r3, \r4, \r5, \r6, \r7
.endm
.macro shift_store_8 type, strd, r0, r1, r2, r3
.ifc \type, put
        sqrshrun_b      6,     \r0, \r1, \r2, \r3
        st_8b           \strd, \r0, \r1, \r2, \r3
.else
        srshr_h         2,     \r0, \r1, \r2, \r3
        st_16b          \strd, \r0, \r1, \r2, \r3
.endif
.endm
.macro shift_store_16 type, strd, r0, r1, r2, r3
.ifc \type, put
        sqrshrun        \r0\().8b,  \r0\().8h, #6
        sqrshrun2       \r0\().16b, \r1\().8h, #6
        sqrshrun        \r2\().8b,  \r2\().8h, #6
        sqrshrun2       \r2\().16b, \r3\().8h, #6
        st_16b          \strd, \r0, \r2
.else
        srshr_h         2,     \r0, \r1, \r2, \r3
        st1             {\r0\().8h, \r1\().8h}, [x0], \strd
        st1             {\r2\().8h, \r3\().8h}, [x8], \strd
.endif
.endm

.macro make_8tap_fn op, type, type_h, type_v
function \op\()_8tap_\type\()_8bpc_neon, export=1
        mov             x8,  \type_h
        mov             x9,  \type_v
        b               \op\()_8tap
endfunc
.endm

// No spaces in these expressions, due to gas-preprocessor.
#define REGULAR ((0*15<<7)|3*15)
#define SMOOTH  ((1*15<<7)|4*15)
#define SHARP   ((2*15<<7)|3*15)

.macro filter_fn type, dst, d_strd, src, s_strd, w, h, mx, xmx, my, xmy, ds2, sr2, shift_hv
make_8tap_fn \type, regular,        REGULAR, REGULAR
make_8tap_fn \type, regular_smooth, REGULAR, SMOOTH
make_8tap_fn \type, regular_sharp,  REGULAR, SHARP
make_8tap_fn \type, smooth,         SMOOTH,  SMOOTH
make_8tap_fn \type, smooth_regular, SMOOTH,  REGULAR
make_8tap_fn \type, smooth_sharp,   SMOOTH,  SHARP
make_8tap_fn \type, sharp,          SHARP,   SHARP
make_8tap_fn \type, sharp_regular,  SHARP,   REGULAR
make_8tap_fn \type, sharp_smooth,   SHARP,   SMOOTH

function \type\()_8tap
        mov             w10,  #0x4081  // (1 << 14) | (1 << 7) | (1 << 0)
        mul             \mx,  \mx, w10
        mul             \my,  \my, w10
        add             \mx,  \mx, w8 // mx, 8tap_h, 4tap_h
        add             \my,  \my, w9 // my, 8tap_v, 4tap_v
.ifc \type, prep
        uxtw            \d_strd, \w
        lsl             \d_strd, \d_strd, #1
.endif

        clz             w8,  \w
        tst             \mx, #(0x7f << 14)
        sub             w8,  w8,  #24
        movrel          x10, X(mc_subpel_filters), -8
        b.ne            L(\type\()_8tap_h)
        tst             \my, #(0x7f << 14)
        b.ne            L(\type\()_8tap_v)
        b               \type

L(\type\()_8tap_h):
        cmp             \w,  #4
        ubfm            w9,  \mx, #7, #13
        and             \mx, \mx, #0x7f
        b.le            4f
        mov             \mx,  w9
4:
        tst             \my,  #(0x7f << 14)
        add             \xmx, x10, \mx, uxtw #3
        b.ne            L(\type\()_8tap_hv)

        adr             x9,  L(\type\()_8tap_h_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:     // 2xN h
.ifc \type, put
        add             \xmx,  \xmx,  #2
        ld1             {v0.s}[0], [\xmx]
        sub             \src,  \src,  #1
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
        sxtl            v0.8h,  v0.8b
2:
        ld1             {v4.8b},  [\src], \s_strd
        ld1             {v6.8b},  [\sr2], \s_strd
        uxtl            v4.8h,  v4.8b
        uxtl            v6.8h,  v6.8b
        ext             v5.16b, v4.16b, v4.16b, #2
        ext             v7.16b, v6.16b, v6.16b, #2
        subs            \h,  \h,  #2
        trn1            v3.2s,  v4.2s,  v6.2s
        trn2            v6.2s,  v4.2s,  v6.2s
        trn1            v4.2s,  v5.2s,  v7.2s
        trn2            v7.2s,  v5.2s,  v7.2s
        mul             v3.4h,  v3.4h,  v0.h[0]
        mla             v3.4h,  v4.4h,  v0.h[1]
        mla             v3.4h,  v6.4h,  v0.h[2]
        mla             v3.4h,  v7.4h,  v0.h[3]
        srshr           v3.4h,  v3.4h,  #2
        sqrshrun        v3.8b,  v3.8h,  #4
        st1             {v3.h}[0], [\dst], \d_strd
        st1             {v3.h}[1], [\ds2], \d_strd
        b.gt            2b
        ret
.endif

40:     // 4xN h
        add             \xmx,  \xmx,  #2
        ld1             {v0.s}[0], [\xmx]
        sub             \src,  \src,  #1
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
        sxtl            v0.8h,  v0.8b
4:
        ld1             {v16.8b}, [\src], \s_strd
        ld1             {v20.8b}, [\sr2], \s_strd
        uxtl            v16.8h,  v16.8b
        uxtl            v20.8h,  v20.8b
        ext             v17.16b, v16.16b, v16.16b, #2
        ext             v18.16b, v16.16b, v16.16b, #4
        ext             v19.16b, v16.16b, v16.16b, #6
        ext             v21.16b, v20.16b, v20.16b, #2
        ext             v22.16b, v20.16b, v20.16b, #4
        ext             v23.16b, v20.16b, v20.16b, #6
        subs            \h,  \h,  #2
        mul             v16.4h,  v16.4h,  v0.h[0]
        mla             v16.4h,  v17.4h,  v0.h[1]
        mla             v16.4h,  v18.4h,  v0.h[2]
        mla             v16.4h,  v19.4h,  v0.h[3]
        mul             v20.4h,  v20.4h,  v0.h[0]
        mla             v20.4h,  v21.4h,  v0.h[1]
        mla             v20.4h,  v22.4h,  v0.h[2]
        mla             v20.4h,  v23.4h,  v0.h[3]
        srshr           v16.4h,  v16.4h,  #2
        srshr           v20.4h,  v20.4h,  #2
.ifc \type, put
        sqrshrun        v16.8b,  v16.8h,  #4
        sqrshrun        v20.8b,  v20.8h,  #4
        st1             {v16.s}[0], [\dst], \d_strd
        st1             {v20.s}[0], [\ds2], \d_strd
.else
        st1             {v16.4h}, [\dst], \d_strd
        st1             {v20.4h}, [\ds2], \d_strd
.endif
        b.gt            4b
        ret

80:     // 8xN h
        ld1             {v0.8b}, [\xmx]
        sub             \src,  \src,  #3
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
        sxtl            v0.8h, v0.8b
8:
        ld1             {v16.8b, v17.8b},  [\src], \s_strd
        ld1             {v20.8b, v21.8b},  [\sr2], \s_strd
        uxtl            v16.8h,  v16.8b
        uxtl            v17.8h,  v17.8b
        uxtl            v20.8h,  v20.8b
        uxtl            v21.8h,  v21.8b

        mul             v18.8h,  v16.8h,  v0.h[0]
        mul             v22.8h,  v20.8h,  v0.h[0]
.irpc i, 1234567
        ext             v19.16b, v16.16b, v17.16b, #(2*\i)
        ext             v23.16b, v20.16b, v21.16b, #(2*\i)
        mla             v18.8h,  v19.8h,  v0.h[\i]
        mla             v22.8h,  v23.8h,  v0.h[\i]
.endr
        subs            \h,  \h,  #2
        srshr           v18.8h,  v18.8h, #2
        srshr           v22.8h,  v22.8h, #2
.ifc \type, put
        sqrshrun        v18.8b,  v18.8h, #4
        sqrshrun        v22.8b,  v22.8h, #4
        st1             {v18.8b}, [\dst], \d_strd
        st1             {v22.8b}, [\ds2], \d_strd
.else
        st1             {v18.8h}, [\dst], \d_strd
        st1             {v22.8h}, [\ds2], \d_strd
.endif
        b.gt            8b
        ret
160:
320:
640:
1280:   // 16xN, 32xN, ... h
        ld1             {v0.8b}, [\xmx]
        sub             \src,  \src,  #3
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1
        sxtl            v0.8h, v0.8b

        sub             \s_strd,  \s_strd,  \w, uxtw
        sub             \s_strd,  \s_strd,  #8
.ifc \type, put
        lsl             \d_strd,  \d_strd,  #1
        sub             \d_strd,  \d_strd,  \w, uxtw
.endif
161:
        ld1             {v16.8b, v17.8b, v18.8b},  [\src], #24
        ld1             {v20.8b, v21.8b, v22.8b},  [\sr2], #24
        mov             \mx, \w
        uxtl            v16.8h,  v16.8b
        uxtl            v17.8h,  v17.8b
        uxtl            v18.8h,  v18.8b
        uxtl            v20.8h,  v20.8b
        uxtl            v21.8h,  v21.8b
        uxtl            v22.8h,  v22.8b

16:
        mul             v24.8h,  v16.8h,  v0.h[0]
        mul             v25.8h,  v17.8h,  v0.h[0]
        mul             v26.8h,  v20.8h,  v0.h[0]
        mul             v27.8h,  v21.8h,  v0.h[0]
.irpc i, 1234567
        ext             v28.16b, v16.16b, v17.16b, #(2*\i)
        ext             v29.16b, v17.16b, v18.16b, #(2*\i)
        ext             v30.16b, v20.16b, v21.16b, #(2*\i)
        ext             v31.16b, v21.16b, v22.16b, #(2*\i)
        mla             v24.8h,  v28.8h,  v0.h[\i]
        mla             v25.8h,  v29.8h,  v0.h[\i]
        mla             v26.8h,  v30.8h,  v0.h[\i]
        mla             v27.8h,  v31.8h,  v0.h[\i]
.endr
        srshr           v24.8h,  v24.8h, #2
        srshr           v25.8h,  v25.8h, #2
        srshr           v26.8h,  v26.8h, #2
        srshr           v27.8h,  v27.8h, #2
        subs            \mx, \mx, #16
.ifc \type, put
        sqrshrun        v24.8b,  v24.8h, #4
        sqrshrun2       v24.16b, v25.8h, #4
        sqrshrun        v26.8b,  v26.8h, #4
        sqrshrun2       v26.16b, v27.8h, #4
        st1             {v24.16b}, [\dst], #16
        st1             {v26.16b}, [\ds2], #16
.else
        st1             {v24.8h, v25.8h}, [\dst], #32
        st1             {v26.8h, v27.8h}, [\ds2], #32
.endif
        b.le            9f

        mov             v16.16b, v18.16b
        mov             v20.16b, v22.16b
        ld1             {v17.8b, v18.8b}, [\src], #16
        ld1             {v21.8b, v22.8b}, [\sr2], #16
        uxtl            v17.8h,  v17.8b
        uxtl            v18.8h,  v18.8b
        uxtl            v21.8h,  v21.8b
        uxtl            v22.8h,  v22.8b
        b               16b

9:
        add             \dst,  \dst,  \d_strd
        add             \ds2,  \ds2,  \d_strd
        add             \src,  \src,  \s_strd
        add             \sr2,  \sr2,  \s_strd

        subs            \h,  \h,  #2
        b.gt            161b
        ret

L(\type\()_8tap_h_tbl):
        .hword L(\type\()_8tap_h_tbl) - 1280b
        .hword L(\type\()_8tap_h_tbl) -  640b
        .hword L(\type\()_8tap_h_tbl) -  320b
        .hword L(\type\()_8tap_h_tbl) -  160b
        .hword L(\type\()_8tap_h_tbl) -   80b
        .hword L(\type\()_8tap_h_tbl) -   40b
        .hword L(\type\()_8tap_h_tbl) -   20b
        .hword 0


L(\type\()_8tap_v):
        cmp             \h,  #4
        ubfm            w9,  \my, #7, #13
        and             \my, \my, #0x7f
        b.le            4f
        mov             \my, w9
4:
        add             \xmy, x10, \my, uxtw #3

        adr             x9,  L(\type\()_8tap_v_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:     // 2xN v
.ifc \type, put
        b.gt            28f

        cmp             \h,  #2
        add             \xmy, \xmy, #2
        ld1             {v0.s}[0], [\xmy]
        sub             \src,  \src,  \s_strd
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1
        lsl             \d_strd,  \d_strd,  #1
        sxtl            v0.8h, v0.8b

        // 2x2 v
        load_h          \src, \sr2, \s_strd, v1, v2, v3, v4, v5
        interleave_1_h  v1, v2, v3, v4, v5
        b.gt            24f
        uxtl_b          v1, v2, v3, v4
        mul_mla_4       v6, v1, v2, v3, v4, .4h
        sqrshrun_b      6,  v6
        st_h            \d_strd, v6, 2
        ret

24:     // 2x4 v
        load_h          \sr2, \src, \s_strd, v6, v7
        interleave_1_h  v5, v6, v7
        interleave_2_s  v1, v2, v3, v4, v5, v6
        uxtl_b          v1, v2, v3, v4
        mul_mla_4       v6, v1, v2, v3, v4, .8h
        sqrshrun_b      6,  v6
        st_h            \d_strd, v6, 4
        ret

28:     // 2x8, 2x16 v
        ld1             {v0.8b}, [\xmy]
        sub             \sr2,  \src,  \s_strd, lsl #1
        add             \ds2,  \dst,  \d_strd
        sub             \src,  \sr2,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
        sxtl            v0.8h, v0.8b

        load_h          \src, \sr2, \s_strd, v1,  v2,  v3,  v4, v5, v6, v7
        interleave_1_h  v1,  v2,  v3,  v4,  v5
        interleave_1_h  v5,  v6,  v7
        interleave_2_s  v1,  v2,  v3,  v4,  v5,  v6
        uxtl_b          v1,  v2,  v3,  v4
216:
        subs            \h,  \h,  #8
        load_h          \sr2, \src, \s_strd, v16, v17, v18, v19
        load_h          \sr2, \src, \s_strd, v20, v21, v22, v23
        interleave_1_h  v7,  v16, v17, v18, v19
        interleave_1_h  v19, v20, v21, v22, v23
        interleave_2_s  v5,  v6,  v7,  v16, v17, v18
        interleave_2_s  v17, v18, v19, v20, v21, v22
        uxtl_b          v5,  v6,  v7,  v16
        uxtl_b          v17, v18, v19, v20
        mul_mla_8_4     v30, v31, v1,  v2,  v3,  v4,  v5,  v6,  v7,  v16, v17, v18, v19, v20
        sqrshrun_b      6,   v30, v31
        st_h            \d_strd, v30, 4
        st_h            \d_strd, v31, 4
        b.le            0f
        mov             v1.16b,  v17.16b
        mov             v2.16b,  v18.16b
        mov             v3.16b,  v19.16b
        mov             v4.16b,  v20.16b
        mov             v5.16b,  v21.16b
        mov             v6.16b,  v22.16b
        mov             v7.16b,  v23.16b
        b               216b
0:
        ret
.endif

40:
        b.gt            480f

        // 4x2, 4x4 v
        cmp             \h,  #2
        add             \xmy, \xmy, #2
        ld1             {v0.s}[0], [\xmy]
        sub             \src, \src, \s_strd
        add             \ds2, \dst, \d_strd
        add             \sr2, \src, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h, v0.8b

        load_s          \src, \sr2, \s_strd, v1, v2, v3, v4, v5
        interleave_1_s  v1, v2, v3, v4, v5
        uxtl_b          v1, v2, v3, v4
        mul_mla_4       v6, v1, v2, v3, v4, .8h
        shift_store_4   \type, \d_strd, v6
        b.le            0f
        load_s          \sr2, \src, \s_strd, v6, v7
        interleave_1_s  v5, v6, v7
        uxtl_b          v5, v6
        mul_mla_4       v7, v3, v4, v5, v6, .8h
        shift_store_4   \type, \d_strd, v7
0:
        ret

480:    // 4x8, 4x16 v
        ld1             {v0.8b}, [\xmy]
        sub             \sr2, \src, \s_strd, lsl #1
        add             \ds2, \dst, \d_strd
        sub             \src, \sr2, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h, v0.8b

        load_s          \src, \sr2, \s_strd, v16, v17, v18, v19, v20, v21, v22
        interleave_1_s  v16, v17, v18
        interleave_1_s  v18, v19, v20, v21, v22
        uxtl_b          v16, v17
        uxtl_b          v18, v19, v20, v21

48:
        subs            \h,  \h,  #4
        load_s          \sr2, \src, \s_strd, v23, v24, v25, v26
        interleave_1_s  v22, v23, v24, v25, v26
        uxtl_b          v22, v23, v24, v25
        mul_mla_8_2     v1,  v2,  v16, v17, v18, v19, v20, v21, v22, v23, v24, v25
        shift_store_4   \type, \d_strd, v1, v2
        b.le            0f
        subs            \h,  \h,  #4
        load_s          \sr2,  \src, \s_strd, v27, v16, v17, v18
        interleave_1_s  v26, v27, v16, v17, v18
        uxtl_b          v26, v27, v16, v17
        mul_mla_8_2     v1,  v2,  v20, v21, v22, v23, v24, v25, v26, v27, v16, v17
        shift_store_4   \type, \d_strd, v1, v2
        b.le            0f
        subs            \h,  \h,  #4
        load_s          \sr2, \src, \s_strd, v19, v20, v21, v22
        interleave_1_s  v18, v19, v20, v21, v22
        uxtl_b          v18, v19, v20, v21
        mul_mla_8_2     v1,  v2,  v24, v25, v26, v27, v16, v17, v18, v19, v20, v21
        shift_store_4   \type, \d_strd, v1, v2
        b               48b
0:
        ret

80:
        b.gt            880f

        // 8x2, 8x4 v
        cmp             \h,  #2
        add             \xmy, \xmy, #2
        ld1             {v0.s}[0], [\xmy]
        sub             \src, \src, \s_strd
        add             \ds2, \dst, \d_strd
        add             \sr2, \src, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h, v0.8b

        load_8b         \src, \sr2, \s_strd, v1, v2, v3, v4, v5
        uxtl_b          v1, v2, v3, v4, v5
        mul_mla_4       v6, v1, v2, v3, v4, .8h
        mul_mla_4       v7, v2, v3, v4, v5, .8h
        shift_store_8   \type, \d_strd, v6, v7
        b.le            0f
        load_8b         \sr2, \src, \s_strd, v6, v7
        uxtl_b          v6, v7
        mul_mla_4       v1, v3, v4, v5, v6, .8h
        mul_mla_4       v2, v4, v5, v6, v7, .8h
        shift_store_8   \type, \d_strd, v1, v2
0:
        ret

880:    // 8x8, 8x16, 8x32 v
1680:   // 16x8, 16x16, ...
320:    // 32x8, 32x16, ...
640:
1280:
        ld1             {v0.8b}, [\xmy]
        sub             \src, \src, \s_strd
        sub             \src, \src, \s_strd, lsl #1
        sxtl            v0.8h, v0.8b
        mov             \my,  \h
168:
        add             \ds2, \dst, \d_strd
        add             \sr2, \src, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1

        load_8b         \src, \sr2, \s_strd, v16, v17, v18, v19, v20, v21, v22
        uxtl_b          v16, v17, v18, v19, v20, v21, v22

88:
        subs            \h,  \h,  #2
        load_8b         \sr2, \src, \s_strd, v23, v24
        uxtl_b          v23, v24
        mul_mla_8_1     v1,  v2,  v16, v17, v18, v19, v20, v21, v22, v23, v24
        shift_store_8   \type, \d_strd, v1, v2
        b.le            9f
        subs            \h,  \h,  #2
        load_8b         \sr2, \src, \s_strd, v25, v26
        uxtl_b          v25, v26
        mul_mla_8_1     v3,  v4,  v18, v19, v20, v21, v22, v23, v24, v25, v26
        shift_store_8   \type, \d_strd, v3, v4
        b.le            9f
        subs            \h,  \h,  #4
        load_8b         \sr2, \src, \s_strd, v27, v16, v17, v18
        uxtl_b          v27, v16, v17, v18
        mul_mla_8_1     v1,  v2,  v20, v21, v22, v23, v24, v25, v26, v27, v16
        mul_mla_8_1     v3,  v4,  v22, v23, v24, v25, v26, v27, v16, v17, v18
        shift_store_8   \type, \d_strd, v1, v2, v3, v4
        b.le            9f
        subs            \h,  \h,  #4
        load_8b         \sr2, \src, \s_strd, v19, v20, v21, v22
        uxtl_b          v19, v20, v21, v22
        mul_mla_8_1     v1,  v2,  v24, v25, v26, v27, v16, v17, v18, v19, v20
        mul_mla_8_1     v3,  v4,  v26, v27, v16, v17, v18, v19, v20, v21, v22
        shift_store_8   \type, \d_strd, v1, v2, v3, v4
        b.gt            88b
9:
        subs            \w,  \w,  #8
        b.le            0f
        asr             \s_strd, \s_strd, #1
        asr             \d_strd, \d_strd, #1
        msub            \src, \s_strd, \xmy, \src
        msub            \dst, \d_strd, \xmy, \dst
        sub             \src, \src, \s_strd, lsl #3
        mov             \h,  \my
        add             \src, \src, #8
.ifc \type, put
        add             \dst, \dst, #8
.else
        add             \dst, \dst, #16
.endif
        b               168b
0:
        ret

160:
        b.gt            1680b

        // 16x4 v
        add             \xmy, \xmy, #2
        ld1             {v0.s}[0], [\xmy]
        sub             \src, \src, \s_strd
        add             \ds2, \dst, \d_strd
        add             \sr2, \src, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h, v0.8b

        cmp             \h,  #2
        load_16b        \src, \sr2, \s_strd, v1,  v2,  v3,  v4,  v5
        uxtl            v16.8h, v1.8b
        uxtl            v17.8h, v2.8b
        uxtl            v18.8h, v3.8b
        uxtl            v19.8h, v4.8b
        uxtl            v20.8h, v5.8b
        uxtl2           v23.8h, v1.16b
        uxtl2           v24.8h, v2.16b
        uxtl2           v25.8h, v3.16b
        uxtl2           v26.8h, v4.16b
        uxtl2           v27.8h, v5.16b
        mul_mla_4       v1,  v16, v17, v18, v19, .8h
        mul_mla_4       v16, v17, v18, v19, v20, .8h
        mul_mla_4       v2,  v23, v24, v25, v26, .8h
        mul_mla_4       v17, v24, v25, v26, v27, .8h
        shift_store_16  \type, \d_strd, v1, v2, v16, v17
        b.le            0f
        load_16b        \sr2, \src, \s_strd, v6,  v7
        uxtl            v21.8h, v6.8b
        uxtl            v22.8h, v7.8b
        uxtl2           v28.8h, v6.16b
        uxtl2           v29.8h, v7.16b
        mul_mla_4       v1,  v18, v19, v20, v21, .8h
        mul_mla_4       v3,  v19, v20, v21, v22, .8h
        mul_mla_4       v2,  v25, v26, v27, v28, .8h
        mul_mla_4       v4,  v26, v27, v28, v29, .8h
        shift_store_16  \type, \d_strd, v1, v2, v3, v4
0:
        ret

L(\type\()_8tap_v_tbl):
        .hword L(\type\()_8tap_v_tbl) - 1280b
        .hword L(\type\()_8tap_v_tbl) -  640b
        .hword L(\type\()_8tap_v_tbl) -  320b
        .hword L(\type\()_8tap_v_tbl) -  160b
        .hword L(\type\()_8tap_v_tbl) -   80b
        .hword L(\type\()_8tap_v_tbl) -   40b
        .hword L(\type\()_8tap_v_tbl) -   20b
        .hword 0

L(\type\()_8tap_hv):
        cmp             \h,  #4
        ubfm            w9,  \my, #7, #13
        and             \my, \my, #0x7f
        b.le            4f
        mov             \my,  w9
4:
        add             \xmy,  x10, \my, uxtw #3

        adr             x9,  L(\type\()_8tap_hv_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:
.ifc \type, put
        add             \xmx,  \xmx,  #2
        ld1             {v0.s}[0],  [\xmx]
        b.gt            280f
        add             \xmy,  \xmy,  #2
        ld1             {v1.s}[0],  [\xmy]

        // 2x2, 2x4 hv
        sub             \sr2, \src, #1
        sub             \src, \sr2, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30

        ld1             {v28.8b}, [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        ext             v29.16b, v28.16b, v28.16b, #2
        mul             v28.4h,  v28.4h,  v0.4h
        mul             v29.4h,  v29.4h,  v0.4h
        addv            h28, v28.4h
        addv            h29, v29.4h
        trn1            v16.4h, v28.4h, v29.4h
        srshr           v16.4h, v16.4h, #2
        bl              L(\type\()_8tap_filter_2)

        trn1            v16.2s, v16.2s, v28.2s
        trn1            v17.2s, v28.2s, v30.2s
        mov             v18.8b, v30.8b

2:
        bl              L(\type\()_8tap_filter_2)

        trn1            v18.2s, v18.2s, v28.2s
        trn1            v19.2s, v28.2s, v30.2s
        smull           v2.4s,  v16.4h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal           v2.4s,  v19.4h, v1.h[3]

        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqxtun          v2.8b,  v2.8h
        subs            \h,  \h,  #2
        st1             {v2.h}[0], [\dst], \d_strd
        st1             {v2.h}[1], [\ds2], \d_strd
        b.le            0f
        mov             v16.8b, v18.8b
        mov             v17.8b, v19.8b
        mov             v18.8b, v30.8b
        b               2b

280:    // 2x8, 2x16, 2x32 hv
        ld1             {v1.8b},  [\xmy]
        sub             \src, \src, #1
        sub             \sr2, \src, \s_strd, lsl #1
        sub             \src, \sr2, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30

        ld1             {v28.8b}, [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        ext             v29.16b, v28.16b, v28.16b, #2
        mul             v28.4h,  v28.4h,  v0.4h
        mul             v29.4h,  v29.4h,  v0.4h
        addv            h28, v28.4h
        addv            h29, v29.4h
        trn1            v16.4h, v28.4h, v29.4h
        srshr           v16.4h, v16.4h, #2

        bl              L(\type\()_8tap_filter_2)
        trn1            v16.2s, v16.2s, v28.2s
        trn1            v17.2s, v28.2s, v30.2s
        mov             v18.8b, v30.8b
        bl              L(\type\()_8tap_filter_2)
        trn1            v18.2s, v18.2s, v28.2s
        trn1            v19.2s, v28.2s, v30.2s
        mov             v20.8b, v30.8b
        bl              L(\type\()_8tap_filter_2)
        trn1            v20.2s, v20.2s, v28.2s
        trn1            v21.2s, v28.2s, v30.2s
        mov             v22.8b, v30.8b

28:
        bl              L(\type\()_8tap_filter_2)
        trn1            v22.2s, v22.2s, v28.2s
        trn1            v23.2s, v28.2s, v30.2s
        smull           v2.4s,  v16.4h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal           v2.4s,  v19.4h, v1.h[3]
        smlal           v2.4s,  v20.4h, v1.h[4]
        smlal           v2.4s,  v21.4h, v1.h[5]
        smlal           v2.4s,  v22.4h, v1.h[6]
        smlal           v2.4s,  v23.4h, v1.h[7]

        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqxtun          v2.8b,  v2.8h
        subs            \h,  \h,  #2
        st1             {v2.h}[0], [\dst], \d_strd
        st1             {v2.h}[1], [\ds2], \d_strd
        b.le            0f
        mov             v16.8b, v18.8b
        mov             v17.8b, v19.8b
        mov             v18.8b, v20.8b
        mov             v19.8b, v21.8b
        mov             v20.8b, v22.8b
        mov             v21.8b, v23.8b
        mov             v22.8b, v30.8b
        b               28b

0:
        br              x15

L(\type\()_8tap_filter_2):
        ld1             {v28.8b},  [\sr2], \s_strd
        ld1             {v30.8b},  [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        uxtl            v30.8h,  v30.8b
        ext             v29.16b, v28.16b, v28.16b, #2
        ext             v31.16b, v30.16b, v30.16b, #2
        trn1            v27.2s,  v28.2s,  v30.2s
        trn2            v30.2s,  v28.2s,  v30.2s
        trn1            v28.2s,  v29.2s,  v31.2s
        trn2            v31.2s,  v29.2s,  v31.2s
        mul             v27.4h,  v27.4h,  v0.h[0]
        mla             v27.4h,  v28.4h,  v0.h[1]
        mla             v27.4h,  v30.4h,  v0.h[2]
        mla             v27.4h,  v31.4h,  v0.h[3]
        srshr           v28.4h,  v27.4h,  #2
        trn2            v30.2s,  v28.2s,  v28.2s
        ret
.endif

40:
        add             \xmx, \xmx, #2
        ld1             {v0.s}[0],  [\xmx]
        b.gt            480f
        add             \xmy, \xmy,  #2
        ld1             {v1.s}[0],  [\xmy]
        sub             \sr2, \src, #1
        sub             \src, \sr2, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30

        // 4x2, 4x4 hv
        ld1             {v26.8b}, [\src], \s_strd
        uxtl            v26.8h,  v26.8b
        ext             v28.16b, v26.16b, v26.16b, #2
        ext             v29.16b, v26.16b, v26.16b, #4
        ext             v30.16b, v26.16b, v26.16b, #6
        mul             v31.4h,  v26.4h,  v0.h[0]
        mla             v31.4h,  v28.4h,  v0.h[1]
        mla             v31.4h,  v29.4h,  v0.h[2]
        mla             v31.4h,  v30.4h,  v0.h[3]
        srshr           v16.4h,  v31.4h,  #2

        bl              L(\type\()_8tap_filter_4)
        mov             v17.8b, v28.8b
        mov             v18.8b, v29.8b

4:
        smull           v2.4s,  v16.4h, v1.h[0]
        bl              L(\type\()_8tap_filter_4)
        smull           v3.4s,  v17.4h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal           v3.4s,  v18.4h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal           v3.4s,  v28.4h, v1.h[2]
        smlal           v2.4s,  v28.4h, v1.h[3]
        smlal           v3.4s,  v29.4h, v1.h[3]
        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqrshrn         v3.4h,  v3.4s,  #\shift_hv
        subs            \h,  \h,  #2
.ifc \type, put
        sqxtun          v2.8b,  v2.8h
        sqxtun          v3.8b,  v3.8h
        st1             {v2.s}[0], [\dst], \d_strd
        st1             {v3.s}[0], [\ds2], \d_strd
.else
        st1             {v2.4h}, [\dst], \d_strd
        st1             {v3.4h}, [\ds2], \d_strd
.endif
        b.le            0f
        mov             v16.16b, v18.16b
        mov             v17.16b, v28.16b
        mov             v18.16b, v29.16b
        b               4b

480:    // 4x8, 4x16, 4x32 hv
        ld1             {v1.8b},  [\xmy]
        sub             \src, \src, #1
        sub             \sr2, \src, \s_strd, lsl #1
        sub             \src, \sr2, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30

        ld1             {v26.8b}, [\src], \s_strd
        uxtl            v26.8h,  v26.8b
        ext             v28.16b, v26.16b, v26.16b, #2
        ext             v29.16b, v26.16b, v26.16b, #4
        ext             v30.16b, v26.16b, v26.16b, #6
        mul             v31.4h,  v26.4h,  v0.h[0]
        mla             v31.4h,  v28.4h,  v0.h[1]
        mla             v31.4h,  v29.4h,  v0.h[2]
        mla             v31.4h,  v30.4h,  v0.h[3]
        srshr           v16.4h,  v31.4h,  #2

        bl              L(\type\()_8tap_filter_4)
        mov             v17.8b, v28.8b
        mov             v18.8b, v29.8b
        bl              L(\type\()_8tap_filter_4)
        mov             v19.8b, v28.8b
        mov             v20.8b, v29.8b
        bl              L(\type\()_8tap_filter_4)
        mov             v21.8b, v28.8b
        mov             v22.8b, v29.8b

48:
        smull           v2.4s,  v16.4h, v1.h[0]
        bl              L(\type\()_8tap_filter_4)
        smull           v3.4s,  v17.4h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal           v3.4s,  v18.4h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal           v3.4s,  v19.4h, v1.h[2]
        smlal           v2.4s,  v19.4h, v1.h[3]
        smlal           v3.4s,  v20.4h, v1.h[3]
        smlal           v2.4s,  v20.4h, v1.h[4]
        smlal           v3.4s,  v21.4h, v1.h[4]
        smlal           v2.4s,  v21.4h, v1.h[5]
        smlal           v3.4s,  v22.4h, v1.h[5]
        smlal           v2.4s,  v22.4h, v1.h[6]
        smlal           v3.4s,  v28.4h, v1.h[6]
        smlal           v2.4s,  v28.4h, v1.h[7]
        smlal           v3.4s,  v29.4h, v1.h[7]
        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqrshrn         v3.4h,  v3.4s,  #\shift_hv
        subs            \h,  \h,  #2
.ifc \type, put
        sqxtun          v2.8b,  v2.8h
        sqxtun          v3.8b,  v3.8h
        st1             {v2.s}[0], [\dst], \d_strd
        st1             {v3.s}[0], [\ds2], \d_strd
.else
        st1             {v2.4h}, [\dst], \d_strd
        st1             {v3.4h}, [\ds2], \d_strd
.endif
        b.le            0f
        mov             v16.8b,  v18.8b
        mov             v17.8b,  v19.8b
        mov             v18.8b,  v20.8b
        mov             v19.8b,  v21.8b
        mov             v20.8b,  v22.8b
        mov             v21.8b,  v28.8b
        mov             v22.8b,  v29.8b
        b               48b
0:
        br              x15

L(\type\()_8tap_filter_4):
        ld1             {v26.8b}, [\sr2], \s_strd
        ld1             {v27.8b}, [\src], \s_strd
        uxtl            v26.8h,  v26.8b
        uxtl            v27.8h,  v27.8b
        ext             v28.16b, v26.16b, v26.16b, #2
        ext             v29.16b, v26.16b, v26.16b, #4
        ext             v30.16b, v26.16b, v26.16b, #6
        mul             v31.4h,  v26.4h,  v0.h[0]
        mla             v31.4h,  v28.4h,  v0.h[1]
        mla             v31.4h,  v29.4h,  v0.h[2]
        mla             v31.4h,  v30.4h,  v0.h[3]
        ext             v28.16b, v27.16b, v27.16b, #2
        ext             v29.16b, v27.16b, v27.16b, #4
        ext             v30.16b, v27.16b, v27.16b, #6
        mul             v27.4h,  v27.4h,  v0.h[0]
        mla             v27.4h,  v28.4h,  v0.h[1]
        mla             v27.4h,  v29.4h,  v0.h[2]
        mla             v27.4h,  v30.4h,  v0.h[3]
        srshr           v28.4h,  v31.4h,  #2
        srshr           v29.4h,  v27.4h,  #2
        ret

80:
160:
320:
        b.gt            880f
        add             \xmy,  \xmy,  #2
        ld1             {v0.8b},  [\xmx]
        ld1             {v1.s}[0],  [\xmy]
        sub             \src,  \src,  #3
        sub             \src,  \src,  \s_strd
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30
        mov             \my,  \h

164:    // 8x2, 8x4, 16x2, 16x4, 32x2, 32x4 hv
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd, \d_strd, #1
        lsl             \s_strd, \s_strd, #1

        ld1             {v28.8b, v29.8b},  [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        uxtl            v29.8h,  v29.8b
        mul             v24.8h,  v28.8h,  v0.h[0]
.irpc i, 1234567
        ext             v26.16b, v28.16b, v29.16b, #(2*\i)
        mla             v24.8h,  v26.8h,  v0.h[\i]
.endr
        srshr           v16.8h,  v24.8h, #2

        bl              L(\type\()_8tap_filter_8)
        mov             v17.16b, v24.16b
        mov             v18.16b, v25.16b

8:
        smull           v2.4s,  v16.4h, v1.h[0]
        smull2          v3.4s,  v16.8h, v1.h[0]
        bl              L(\type\()_8tap_filter_8)
        smull           v4.4s,  v17.4h, v1.h[0]
        smull2          v5.4s,  v17.8h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal2          v3.4s,  v17.8h, v1.h[1]
        smlal           v4.4s,  v18.4h, v1.h[1]
        smlal2          v5.4s,  v18.8h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal2          v3.4s,  v18.8h, v1.h[2]
        smlal           v4.4s,  v24.4h, v1.h[2]
        smlal2          v5.4s,  v24.8h, v1.h[2]
        smlal           v2.4s,  v24.4h, v1.h[3]
        smlal2          v3.4s,  v24.8h, v1.h[3]
        smlal           v4.4s,  v25.4h, v1.h[3]
        smlal2          v5.4s,  v25.8h, v1.h[3]
        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqrshrn2        v2.8h,  v3.4s,  #\shift_hv
        sqrshrn         v4.4h,  v4.4s,  #\shift_hv
        sqrshrn2        v4.8h,  v5.4s,  #\shift_hv
        subs            \h,  \h,  #2
.ifc \type, put
        sqxtun          v2.8b,  v2.8h
        sqxtun          v4.8b,  v4.8h
        st1             {v2.8b}, [\dst], \d_strd
        st1             {v4.8b}, [\ds2], \d_strd
.else
        st1             {v2.8h}, [\dst], \d_strd
        st1             {v4.8h}, [\ds2], \d_strd
.endif
        b.le            9f
        mov             v16.16b, v18.16b
        mov             v17.16b, v24.16b
        mov             v18.16b, v25.16b
        b               8b
9:
        subs            \w,  \w,  #8
        b.le            0f
        asr             \s_strd,  \s_strd,  #1
        asr             \d_strd,  \d_strd,  #1
        msub            \src,  \s_strd,  \xmy,  \src
        msub            \dst,  \d_strd,  \xmy,  \dst
        sub             \src,  \src,  \s_strd,  lsl #2
        mov             \h,  \my
        add             \src,  \src,  #8
.ifc \type, put
        add             \dst,  \dst,  #8
.else
        add             \dst,  \dst,  #16
.endif
        b               164b

880:    // 8x8, 8x16, ..., 16x8, ..., 32x8, ... hv
640:
1280:
        ld1             {v0.8b},  [\xmx]
        ld1             {v1.8b},  [\xmy]
        sub             \src,  \src,  #3
        sub             \src,  \src,  \s_strd
        sub             \src,  \src,  \s_strd, lsl #1
        sxtl            v0.8h,  v0.8b
        sxtl            v1.8h,  v1.8b
        mov             x15, x30
        mov             \my,  \h

168:
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd, \d_strd, #1
        lsl             \s_strd, \s_strd, #1

        ld1             {v28.8b, v29.8b},  [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        uxtl            v29.8h,  v29.8b
        mul             v24.8h,  v28.8h,  v0.h[0]
.irpc i, 1234567
        ext             v26.16b, v28.16b, v29.16b, #(2*\i)
        mla             v24.8h,  v26.8h,  v0.h[\i]
.endr
        srshr           v16.8h,  v24.8h, #2

        bl              L(\type\()_8tap_filter_8)
        mov             v17.16b, v24.16b
        mov             v18.16b, v25.16b
        bl              L(\type\()_8tap_filter_8)
        mov             v19.16b, v24.16b
        mov             v20.16b, v25.16b
        bl              L(\type\()_8tap_filter_8)
        mov             v21.16b, v24.16b
        mov             v22.16b, v25.16b

88:
        smull           v2.4s,  v16.4h, v1.h[0]
        smull2          v3.4s,  v16.8h, v1.h[0]
        bl              L(\type\()_8tap_filter_8)
        smull           v4.4s,  v17.4h, v1.h[0]
        smull2          v5.4s,  v17.8h, v1.h[0]
        smlal           v2.4s,  v17.4h, v1.h[1]
        smlal2          v3.4s,  v17.8h, v1.h[1]
        smlal           v4.4s,  v18.4h, v1.h[1]
        smlal2          v5.4s,  v18.8h, v1.h[1]
        smlal           v2.4s,  v18.4h, v1.h[2]
        smlal2          v3.4s,  v18.8h, v1.h[2]
        smlal           v4.4s,  v19.4h, v1.h[2]
        smlal2          v5.4s,  v19.8h, v1.h[2]
        smlal           v2.4s,  v19.4h, v1.h[3]
        smlal2          v3.4s,  v19.8h, v1.h[3]
        smlal           v4.4s,  v20.4h, v1.h[3]
        smlal2          v5.4s,  v20.8h, v1.h[3]
        smlal           v2.4s,  v20.4h, v1.h[4]
        smlal2          v3.4s,  v20.8h, v1.h[4]
        smlal           v4.4s,  v21.4h, v1.h[4]
        smlal2          v5.4s,  v21.8h, v1.h[4]
        smlal           v2.4s,  v21.4h, v1.h[5]
        smlal2          v3.4s,  v21.8h, v1.h[5]
        smlal           v4.4s,  v22.4h, v1.h[5]
        smlal2          v5.4s,  v22.8h, v1.h[5]
        smlal           v2.4s,  v22.4h, v1.h[6]
        smlal2          v3.4s,  v22.8h, v1.h[6]
        smlal           v4.4s,  v24.4h, v1.h[6]
        smlal2          v5.4s,  v24.8h, v1.h[6]
        smlal           v2.4s,  v24.4h, v1.h[7]
        smlal2          v3.4s,  v24.8h, v1.h[7]
        smlal           v4.4s,  v25.4h, v1.h[7]
        smlal2          v5.4s,  v25.8h, v1.h[7]
        sqrshrn         v2.4h,  v2.4s,  #\shift_hv
        sqrshrn2        v2.8h,  v3.4s,  #\shift_hv
        sqrshrn         v4.4h,  v4.4s,  #\shift_hv
        sqrshrn2        v4.8h,  v5.4s,  #\shift_hv
        subs            \h,  \h,  #2
.ifc \type, put
        sqxtun          v2.8b,  v2.8h
        sqxtun          v4.8b,  v4.8h
        st1             {v2.8b}, [\dst], \d_strd
        st1             {v4.8b}, [\ds2], \d_strd
.else
        st1             {v2.8h}, [\dst], \d_strd
        st1             {v4.8h}, [\ds2], \d_strd
.endif
        b.le            9f
        mov             v16.16b, v18.16b
        mov             v17.16b, v19.16b
        mov             v18.16b, v20.16b
        mov             v19.16b, v21.16b
        mov             v20.16b, v22.16b
        mov             v21.16b, v24.16b
        mov             v22.16b, v25.16b
        b               88b
9:
        subs            \w,  \w,  #8
        b.le            0f
        asr             \s_strd,  \s_strd,  #1
        asr             \d_strd,  \d_strd,  #1
        msub            \src,  \s_strd,  \xmy,  \src
        msub            \dst,  \d_strd,  \xmy,  \dst
        sub             \src,  \src,  \s_strd,  lsl #3
        mov             \h,  \my
        add             \src,  \src,  #8
.ifc \type, put
        add             \dst,  \dst,  #8
.else
        add             \dst,  \dst,  #16
.endif
        b               168b
0:
        br              x15

L(\type\()_8tap_filter_8):
        ld1             {v28.8b, v29.8b},  [\sr2], \s_strd
        ld1             {v30.8b, v31.8b},  [\src], \s_strd
        uxtl            v28.8h,  v28.8b
        uxtl            v29.8h,  v29.8b
        uxtl            v30.8h,  v30.8b
        uxtl            v31.8h,  v31.8b
        mul             v24.8h,  v28.8h,  v0.h[0]
        mul             v25.8h,  v30.8h,  v0.h[0]
.irpc i, 1234567
        ext             v26.16b, v28.16b, v29.16b, #(2*\i)
        ext             v27.16b, v30.16b, v31.16b, #(2*\i)
        mla             v24.8h,  v26.8h,  v0.h[\i]
        mla             v25.8h,  v27.8h,  v0.h[\i]
.endr
        srshr           v24.8h,  v24.8h, #2
        srshr           v25.8h,  v25.8h, #2
        ret

L(\type\()_8tap_hv_tbl):
        .hword L(\type\()_8tap_hv_tbl) - 1280b
        .hword L(\type\()_8tap_hv_tbl) -  640b
        .hword L(\type\()_8tap_hv_tbl) -  320b
        .hword L(\type\()_8tap_hv_tbl) -  160b
        .hword L(\type\()_8tap_hv_tbl) -   80b
        .hword L(\type\()_8tap_hv_tbl) -   40b
        .hword L(\type\()_8tap_hv_tbl) -   20b
        .hword 0
endfunc


function \type\()_bilin_8bpc_neon, export=1
        dup             v1.16b, \mx
        dup             v3.16b, \my
        mov             w9,  #16
        sub             w8, w9, \mx
        sub             w9, w9, \my
        dup             v0.16b, w8
        dup             v2.16b, w9
.ifc \type, prep
        uxtw            \d_strd, \w
        lsl             \d_strd, \d_strd, #1
.endif

        clz             w8,  \w
        sub             w8,  w8,  #24
        cbnz            \mx, L(\type\()_bilin_h)
        cbnz            \my, L(\type\()_bilin_v)
        b               \type

L(\type\()_bilin_h):
        cbnz            \my, L(\type\()_bilin_hv)

        adr             x9,  L(\type\()_bilin_h_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:     // 2xN h
.ifc \type, put
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
2:
        ld1             {v4.s}[0],  [\src], \s_strd
        ld1             {v6.s}[0],  [\sr2], \s_strd
        ext             v5.8b,  v4.8b,  v4.8b, #1
        ext             v7.8b,  v6.8b,  v6.8b, #1
        trn1            v4.4h,  v4.4h,  v6.4h
        trn1            v5.4h,  v5.4h,  v7.4h
        subs            \h,  \h,  #2
        umull           v4.8h,  v4.8b,  v0.8b
        umlal           v4.8h,  v5.8b,  v1.8b
        uqrshrn         v4.8b,  v4.8h,  #4
        st1             {v4.h}[0], [\dst], \d_strd
        st1             {v4.h}[1], [\ds2], \d_strd
        b.gt            2b
        ret
.endif

40:     // 4xN h
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
4:
        ld1             {v4.8b}, [\src], \s_strd
        ld1             {v6.8b}, [\sr2], \s_strd
        ext             v5.8b,  v4.8b,  v4.8b, #1
        ext             v7.8b,  v6.8b,  v6.8b, #1
        trn1            v4.2s,  v4.2s,  v6.2s
        trn1            v5.2s,  v5.2s,  v7.2s
        subs            \h,  \h,  #2
        umull           v4.8h,  v4.8b,  v0.8b
        umlal           v4.8h,  v5.8b,  v1.8b
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #4
        st1             {v4.s}[0], [\dst], \d_strd
        st1             {v4.s}[1], [\ds2], \d_strd
.else
        st1             {v4.d}[0], [\dst], \d_strd
        st1             {v4.d}[1], [\ds2], \d_strd
.endif
        b.gt            4b
        ret

80:     // 8xN h
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \d_strd,  \d_strd,  #1
        lsl             \s_strd,  \s_strd,  #1
8:
        ld1             {v4.16b}, [\src], \s_strd
        ld1             {v6.16b}, [\sr2], \s_strd
        ext             v5.16b, v4.16b, v4.16b, #1
        ext             v7.16b, v6.16b, v6.16b, #1
        subs            \h,  \h,  #2
        umull           v4.8h,  v4.8b,  v0.8b
        umull           v6.8h,  v6.8b,  v0.8b
        umlal           v4.8h,  v5.8b,  v1.8b
        umlal           v6.8h,  v7.8b,  v1.8b
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #4
        uqrshrn         v6.8b,  v6.8h,  #4
        st1             {v4.8b}, [\dst], \d_strd
        st1             {v6.8b}, [\ds2], \d_strd
.else
        st1             {v4.8h}, [\dst], \d_strd
        st1             {v6.8h}, [\ds2], \d_strd
.endif
        b.gt            8b
        ret
160:
320:
640:
1280:   // 16xN, 32xN, ... h
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1

        sub             \s_strd,  \s_strd,  \w, uxtw
        sub             \s_strd,  \s_strd,  #8
.ifc \type, put
        lsl             \d_strd,  \d_strd,  #1
        sub             \d_strd,  \d_strd,  \w, uxtw
.endif
161:
        ld1             {v16.d}[1],  [\src], #8
        ld1             {v20.d}[1],  [\sr2], #8
        mov             \mx, \w

16:
        ld1             {v18.16b},  [\src], #16
        ld1             {v22.16b},  [\sr2], #16
        ext             v17.16b, v16.16b, v18.16b, #8
        ext             v19.16b, v16.16b, v18.16b, #9
        ext             v21.16b, v20.16b, v22.16b, #8
        ext             v23.16b, v20.16b, v22.16b, #9
        umull           v16.8h,  v17.8b,  v0.8b
        umull2          v17.8h,  v17.16b, v0.16b
        umull           v20.8h,  v21.8b,  v0.8b
        umull2          v21.8h,  v21.16b, v0.16b
        umlal           v16.8h,  v19.8b,  v1.8b
        umlal2          v17.8h,  v19.16b, v1.16b
        umlal           v20.8h,  v23.8b,  v1.8b
        umlal2          v21.8h,  v23.16b, v1.16b
        subs            \mx, \mx, #16
.ifc \type, put
        uqrshrn         v16.8b,  v16.8h, #4
        uqrshrn2        v16.16b, v17.8h, #4
        uqrshrn         v20.8b,  v20.8h, #4
        uqrshrn2        v20.16b, v21.8h, #4
        st1             {v16.16b}, [\dst], #16
        st1             {v20.16b}, [\ds2], #16
.else
        st1             {v16.8h, v17.8h}, [\dst], #32
        st1             {v20.8h, v21.8h}, [\ds2], #32
.endif
        b.le            9f

        mov             v16.16b, v18.16b
        mov             v20.16b, v22.16b
        b               16b

9:
        add             \dst,  \dst,  \d_strd
        add             \ds2,  \ds2,  \d_strd
        add             \src,  \src,  \s_strd
        add             \sr2,  \sr2,  \s_strd

        subs            \h,  \h,  #2
        b.gt            161b
        ret

L(\type\()_bilin_h_tbl):
        .hword L(\type\()_bilin_h_tbl) - 1280b
        .hword L(\type\()_bilin_h_tbl) -  640b
        .hword L(\type\()_bilin_h_tbl) -  320b
        .hword L(\type\()_bilin_h_tbl) -  160b
        .hword L(\type\()_bilin_h_tbl) -   80b
        .hword L(\type\()_bilin_h_tbl) -   40b
        .hword L(\type\()_bilin_h_tbl) -   20b
        .hword 0


L(\type\()_bilin_v):
        cmp             \h,  #4
        adr             x9,  L(\type\()_bilin_v_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:     // 2xN v
.ifc \type, put
        cmp             \h,  #2
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1
        lsl             \d_strd,  \d_strd,  #1

        // 2x2 v
        ld1             {v16.h}[0], [\src], \s_strd
        b.gt            24f
        ld1             {v17.h}[0], [\sr2], \s_strd
        ld1             {v18.h}[0], [\src], \s_strd
        trn1            v16.4h, v16.4h, v17.4h
        trn1            v17.4h, v17.4h, v18.4h
        umull           v4.8h,  v16.8b,  v2.8b
        umlal           v4.8h,  v17.8b,  v3.8b
        uqrshrn         v4.8b,  v4.8h,  #4
        st1             {v4.h}[0], [\dst]
        st1             {v4.h}[1], [\ds2]
        ret
24:     // 2x4, 2x8, ... v
        ld1             {v17.h}[0], [\sr2], \s_strd
        ld1             {v18.h}[0], [\src], \s_strd
        ld1             {v19.h}[0], [\sr2], \s_strd
        ld1             {v20.h}[0], [\src], \s_strd
        trn1            v16.4h, v16.4h, v17.4h
        trn1            v17.4h, v17.4h, v18.4h
        trn1            v18.4h, v18.4h, v19.4h
        trn1            v19.4h, v19.4h, v20.4h
        trn1            v16.2s, v16.2s, v18.2s
        trn1            v17.2s, v17.2s, v19.2s
        umull           v4.8h,  v16.8b,  v2.8b
        umlal           v4.8h,  v17.8b,  v3.8b
        subs            \h,  \h,  #4
        uqrshrn         v4.8b,  v4.8h,  #4
        st1             {v4.h}[0], [\dst], \d_strd
        st1             {v4.h}[1], [\ds2], \d_strd
        st1             {v4.h}[2], [\dst], \d_strd
        st1             {v4.h}[3], [\ds2], \d_strd
        b.le            0f
        mov             v16.8b, v20.8b
        b               24b
0:
        ret
.endif

40:     // 4xN v
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1
        lsl             \d_strd,  \d_strd,  #1
        ld1             {v16.s}[0], [\src], \s_strd
4:
        ld1             {v17.s}[0], [\sr2], \s_strd
        ld1             {v18.s}[0], [\src], \s_strd
        trn1            v16.2s, v16.2s, v17.2s
        trn1            v17.2s, v17.2s, v18.2s
        umull           v4.8h,  v16.8b,  v2.8b
        umlal           v4.8h,  v17.8b,  v3.8b
        subs            \h,  \h,  #2
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #4
        st1             {v4.s}[0], [\dst], \d_strd
        st1             {v4.s}[1], [\ds2], \d_strd
.else
        st1             {v4.d}[0], [\dst], \d_strd
        st1             {v4.d}[1], [\ds2], \d_strd
.endif
        b.le            0f
        mov             v16.8b, v18.8b
        b               4b
0:
        ret

80:     // 8xN v
        add             \ds2,  \dst,  \d_strd
        add             \sr2,  \src,  \s_strd
        lsl             \s_strd,  \s_strd,  #1
        lsl             \d_strd,  \d_strd,  #1
        ld1             {v16.8b}, [\src], \s_strd
8:
        ld1             {v17.8b}, [\sr2], \s_strd
        ld1             {v18.8b}, [\src], \s_strd
        umull           v4.8h,  v16.8b,  v2.8b
        umull           v5.8h,  v17.8b,  v2.8b
        umlal           v4.8h,  v17.8b,  v3.8b
        umlal           v5.8h,  v18.8b,  v3.8b
        subs            \h,  \h,  #2
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #4
        uqrshrn         v5.8b,  v5.8h,  #4
        st1             {v4.8b}, [\dst], \d_strd
        st1             {v5.8b}, [\ds2], \d_strd
.else
        st1             {v4.8h}, [\dst], \d_strd
        st1             {v5.8h}, [\ds2], \d_strd
.endif
        b.le            0f
        mov             v16.8b, v18.8b
        b               8b
0:
        ret

160:    // 16xN, 32xN, ...
320:
640:
1280:
        mov             \my,  \h
1:
        add             \ds2, \dst, \d_strd
        add             \sr2, \src, \s_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1

        ld1             {v16.16b}, [\src], \s_strd
2:
        ld1             {v17.16b}, [\sr2], \s_strd
        ld1             {v18.16b}, [\src], \s_strd
        umull           v4.8h,  v16.8b,  v2.8b
        umull2          v5.8h,  v16.16b, v2.16b
        umull           v6.8h,  v17.8b,  v2.8b
        umull2          v7.8h,  v17.16b, v2.16b
        umlal           v4.8h,  v17.8b,  v3.8b
        umlal2          v5.8h,  v17.16b, v3.16b
        umlal           v6.8h,  v18.8b,  v3.8b
        umlal2          v7.8h,  v18.16b, v3.16b
        subs            \h,  \h,  #2
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #4
        uqrshrn2        v4.16b, v5.8h,  #4
        uqrshrn         v6.8b,  v6.8h,  #4
        uqrshrn2        v6.16b, v7.8h,  #4
        st1             {v4.16b}, [\dst], \d_strd
        st1             {v6.16b}, [\ds2], \d_strd
.else
        st1             {v4.8h, v5.8h}, [\dst], \d_strd
        st1             {v6.8h, v7.8h}, [\ds2], \d_strd
.endif
        b.le            9f
        mov             v16.16b, v18.16b
        b               2b
9:
        subs            \w,  \w,  #16
        b.le            0f
        asr             \s_strd, \s_strd, #1
        asr             \d_strd, \d_strd, #1
        msub            \src, \s_strd, \xmy, \src
        msub            \dst, \d_strd, \xmy, \dst
        sub             \src, \src, \s_strd, lsl #1
        mov             \h,  \my
        add             \src, \src, #16
.ifc \type, put
        add             \dst, \dst, #16
.else
        add             \dst, \dst, #32
.endif
        b               1b
0:
        ret

L(\type\()_bilin_v_tbl):
        .hword L(\type\()_bilin_v_tbl) - 1280b
        .hword L(\type\()_bilin_v_tbl) -  640b
        .hword L(\type\()_bilin_v_tbl) -  320b
        .hword L(\type\()_bilin_v_tbl) -  160b
        .hword L(\type\()_bilin_v_tbl) -   80b
        .hword L(\type\()_bilin_v_tbl) -   40b
        .hword L(\type\()_bilin_v_tbl) -   20b
        .hword 0

L(\type\()_bilin_hv):
        uxtl            v2.8h, v2.8b
        uxtl            v3.8h, v3.8b
        adr             x9,  L(\type\()_bilin_hv_tbl)
        ldrh            w8,  [x9, x8, lsl #1]
        sub             x9,  x9,  w8, uxtw
        br              x9

20:     // 2xN hv
.ifc \type, put
        add             \sr2, \src, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1

        ld1             {v28.s}[0],  [\src], \s_strd
        ext             v29.8b, v28.8b, v28.8b, #1
        umull           v16.8h, v28.8b, v0.8b
        umlal           v16.8h, v29.8b, v1.8b

2:
        ld1             {v28.s}[0],  [\sr2], \s_strd
        ld1             {v30.s}[0],  [\src], \s_strd
        ext             v29.8b, v28.8b, v28.8b, #1
        ext             v31.8b, v30.8b, v30.8b, #1
        trn1            v28.4h, v28.4h, v30.4h
        trn1            v29.4h, v29.4h, v31.4h
        umull           v17.8h, v28.8b, v0.8b
        umlal           v17.8h, v29.8b, v1.8b

        trn1            v16.2s, v16.2s, v17.2s

        mul             v4.4h,  v16.4h, v2.4h
        mla             v4.4h,  v17.4h, v3.4h
        uqrshrn         v4.8b,  v4.8h,  #8
        subs            \h,  \h,  #2
        st1             {v4.h}[0], [\dst], \d_strd
        st1             {v4.h}[1], [\ds2], \d_strd
        b.le            0f
        trn2            v16.2s, v17.2s, v17.2s
        b               2b
0:
        ret
.endif

40:     // 4xN hv
        add             \sr2, \src, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1

        ld1             {v28.8b},  [\src], \s_strd
        ext             v29.8b, v28.8b, v28.8b, #1
        umull           v16.8h, v28.8b, v0.8b
        umlal           v16.8h, v29.8b, v1.8b

4:
        ld1             {v28.8b},  [\sr2], \s_strd
        ld1             {v30.8b},  [\src], \s_strd
        ext             v29.8b, v28.8b, v28.8b, #1
        ext             v31.8b, v30.8b, v30.8b, #1
        trn1            v28.2s, v28.2s, v30.2s
        trn1            v29.2s, v29.2s, v31.2s
        umull           v17.8h, v28.8b, v0.8b
        umlal           v17.8h, v29.8b, v1.8b

        trn1            v16.2d, v16.2d, v17.2d

        mul             v4.8h,  v16.8h, v2.8h
        mla             v4.8h,  v17.8h, v3.8h
        subs            \h,  \h,  #2
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #8
        st1             {v4.s}[0], [\dst], \d_strd
        st1             {v4.s}[1], [\ds2], \d_strd
.else
        urshr           v4.8h,  v4.8h,  #4
        st1             {v4.d}[0], [\dst], \d_strd
        st1             {v4.d}[1], [\ds2], \d_strd
.endif
        b.le            0f
        trn2            v16.2d, v17.2d, v17.2d
        b               4b
0:
        ret

80:     // 8xN, 16xN, ... hv
160:
320:
640:
1280:
        mov             \my,  \h

1:
        add             \sr2, \src, \s_strd
        add             \ds2, \dst, \d_strd
        lsl             \s_strd, \s_strd, #1
        lsl             \d_strd, \d_strd, #1

        ld1             {v28.16b},  [\src], \s_strd
        ext             v29.16b, v28.16b, v28.16b, #1
        umull           v16.8h, v28.8b, v0.8b
        umlal           v16.8h, v29.8b, v1.8b

2:
        ld1             {v28.16b},  [\sr2], \s_strd
        ld1             {v30.16b},  [\src], \s_strd
        ext             v29.16b, v28.16b, v28.16b, #1
        ext             v31.16b, v30.16b, v30.16b, #1
        umull           v17.8h, v28.8b, v0.8b
        umlal           v17.8h, v29.8b, v1.8b
        umull           v18.8h, v30.8b, v0.8b
        umlal           v18.8h, v31.8b, v1.8b

        mul             v4.8h,  v16.8h, v2.8h
        mla             v4.8h,  v17.8h, v3.8h
        mul             v5.8h,  v17.8h, v2.8h
        mla             v5.8h,  v18.8h, v3.8h
        subs            \h,  \h,  #2
.ifc \type, put
        uqrshrn         v4.8b,  v4.8h,  #8
        uqrshrn         v5.8b,  v5.8h,  #8
        st1             {v4.8b}, [\dst], \d_strd
        st1             {v5.8b}, [\ds2], \d_strd
.else
        urshr           v4.8h,  v4.8h,  #4
        urshr           v5.8h,  v5.8h,  #4
        st1             {v4.8h}, [\dst], \d_strd
        st1             {v5.8h}, [\ds2], \d_strd
.endif
        b.le            9f
        mov             v16.16b, v18.16b
        b               2b
9:
        subs            \w,  \w,  #8
        b.le            0f
        asr             \s_strd,  \s_strd,  #1
        asr             \d_strd,  \d_strd,  #1
        msub            \src,  \s_strd,  \xmy,  \src
        msub            \dst,  \d_strd,  \xmy,  \dst
        sub             \src,  \src,  \s_strd,  lsl #1
        mov             \h,  \my
        add             \src,  \src,  #8
.ifc \type, put
        add             \dst,  \dst,  #8
.else
        add             \dst,  \dst,  #16
.endif
        b               1b
0:
        ret

L(\type\()_bilin_hv_tbl):
        .hword L(\type\()_bilin_hv_tbl) - 1280b
        .hword L(\type\()_bilin_hv_tbl) -  640b
        .hword L(\type\()_bilin_hv_tbl) -  320b
        .hword L(\type\()_bilin_hv_tbl) -  160b
        .hword L(\type\()_bilin_hv_tbl) -   80b
        .hword L(\type\()_bilin_hv_tbl) -   40b
        .hword L(\type\()_bilin_hv_tbl) -   20b
        .hword 0
endfunc
.endm

filter_fn put,  x0, x1, x2, x3, w4, w5, w6, x6, w7, x7, x8, x9, 10
filter_fn prep, x0, x7, x1, x2, w3, w4, w5, x5, w6, x6, x8, x9, 6