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/*
 * Copyright © 2018, VideoLAN and dav1d authors
 * Copyright © 2018, Janne Grunau
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 * Copyright © 2018, Martin Storsjo
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 * 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"
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#include "util.S"
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.macro avg dst, t0, t1, t2, t3
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        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

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.macro w_avg dst, t0, t1, t2, t3
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        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

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.macro mask dst, t0, t1, t2, t3
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        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
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        clz             w4,  w4
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.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
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        adr             x7,  L(\type\()_tbl)
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        sub             w4,  w4,  #24
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        ldrh            w4,  [x7, x4, lsl #1]
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        \type           v4,  v0,  v1,  v2,  v3
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        sub             x7,  x7,  w4, uxtw
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        br              x7
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        cmp             w5,  #4
        st1             {v4.s}[0],  [x0], x1
        st1             {v4.s}[1],  [x0], x1
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        st1             {v4.s}[2],  [x0], x1
        st1             {v4.s}[3],  [x0], x1
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        b.eq            0f
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        \type           v5,  v0,  v1,  v2,  v3
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        cmp             w5,  #8
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        st1             {v5.s}[0],  [x0], x1
        st1             {v5.s}[1],  [x0], x1
        st1             {v5.s}[2],  [x0], x1
        st1             {v5.s}[3],  [x0], x1
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        b.eq            0f
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        \type           v4,  v0,  v1,  v2,  v3
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        st1             {v4.s}[0],  [x0], x1
        st1             {v4.s}[1],  [x0], x1
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        \type           v5,  v0,  v1,  v2,  v3
        st1             {v4.s}[2],  [x0], x1
        st1             {v4.s}[3],  [x0], x1
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        st1             {v5.s}[0],  [x0], x1
        st1             {v5.s}[1],  [x0], x1
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        st1             {v5.s}[2],  [x0], x1
        st1             {v5.s}[3],  [x0], x1
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        ret
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        st1             {v4.d}[0],  [x0], x1
        \type           v5,  v0,  v1,  v2,  v3
        st1             {v4.d}[1],  [x0], x1
        st1             {v5.d}[0],  [x0], x1
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        subs            w5,  w5,  #4
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        st1             {v5.d}[1],  [x0], x1
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        b.le            0f
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        \type           v4,  v0,  v1,  v2,  v3
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        b               8b
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        \type           v5,  v0,  v1,  v2,  v3
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        st1             {v4.16b}, [x0], x1
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        \type           v6,  v0,  v1,  v2,  v3
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        st1             {v5.16b}, [x0], x1
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        \type           v7,  v0,  v1,  v2,  v3
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        st1             {v6.16b}, [x0], x1
        subs            w5,  w5,  #4
        st1             {v7.16b}, [x0], x1
        b.le            0f
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        \type           v4,  v0,  v1,  v2,  v3
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        b               16b
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        add             x7,  x0,  x1
        lsl             x1,  x1,  #1
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        \type           v5,  v0,  v1,  v2,  v3
        \type           v6,  v0,  v1,  v2,  v3
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        st1             {v4.16b,v5.16b}, [x0], x1
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        \type           v7,  v0,  v1,  v2,  v3
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        subs            w5,  w5,  #2
        st1             {v6.16b,v7.16b}, [x7], x1
        b.le            0f
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        \type           v4,  v0,  v1,  v2,  v3
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        b               32b
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        add             x7,  x0,  x1
        lsl             x1,  x1,  #1
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        \type           v5,  v0,  v1,  v2,  v3
        \type           v6,  v0,  v1,  v2,  v3
        \type           v7,  v0,  v1,  v2,  v3
        \type           v16, v0,  v1,  v2,  v3
        \type           v17, v0,  v1,  v2,  v3
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        st1             {v4.16b,v5.16b,v6.16b,v7.16b}, [x0], x1
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        \type           v18, v0,  v1,  v2,  v3
        \type           v19, v0,  v1,  v2,  v3
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        subs            w5,  w5,  #2
        st1             {v16.16b,v17.16b,v18.16b,v19.16b}, [x7], x1
        b.le            0f
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        \type           v4, v0,  v1,  v2,  v3
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        b               64b
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        add             x7,  x0,  #64
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        \type           v5,  v0,  v1,  v2,  v3
        \type           v6,  v0,  v1,  v2,  v3
        \type           v7,  v0,  v1,  v2,  v3
        \type           v16, v0,  v1,  v2,  v3
        \type           v17, v0,  v1,  v2,  v3
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        st1             {v4.16b,v5.16b,v6.16b,v7.16b}, [x0], x1
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        \type           v18, v0,  v1,  v2,  v3
        \type           v19, v0,  v1,  v2,  v3
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        subs            w5,  w5,  #1
        st1             {v16.16b,v17.16b,v18.16b,v19.16b}, [x7], x1
        b.le            0f
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        \type           v4, v0,  v1,  v2,  v3
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        b               128b
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        ret
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L(\type\()_tbl):
        .hword L(\type\()_tbl) - 1280b
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        .hword L(\type\()_tbl) -  640b
        .hword L(\type\()_tbl) -  320b
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        .hword L(\type\()_tbl) -   16b
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        .hword L(\type\()_tbl) -    8b
        .hword L(\type\()_tbl) -    4b
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endfunc
.endm

bidir_fn avg
bidir_fn w_avg
bidir_fn mask
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.macro w_mask_fn type
function w_mask_\type\()_8bpc_neon, export=1
        clz             w8,  w4
        adr             x9,  L(w_mask_\type\()_tbl)
        sub             w8,  w8,  #24
        ldrh            w8,  [x9,  x8,  lsl #1]
        sub             x9,  x9,  w8,  uxtw
        mov             w10, #6903
        dup             v0.8h,   w10
.if \type == 444
        movi            v1.16b,  #64
.elseif \type == 422
        dup             v2.8b,   w7
        movi            v3.8b,   #129
        sub             v3.8b,   v3.8b,   v2.8b
.elseif \type == 420
        dup             v2.8h,   w7
        movi            v3.8h,   #1, lsl #8
        sub             v3.8h,   v3.8h,   v2.8h
.endif
        add             x12,  x0,  x1
        lsl             x1,   x1,  #1
        br              x9
4:
        ld1             {v4.8h,   v5.8h},   [x2],  #32  // tmp1 (four rows at once)
        ld1             {v6.8h,   v7.8h},   [x3],  #32  // tmp2 (four rows at once)
        subs            w5,  w5,  #4
        sub             v16.8h,  v6.8h,   v4.8h
        sub             v17.8h,  v7.8h,   v5.8h
        sabd            v18.8h,  v4.8h,   v6.8h
        sabd            v19.8h,  v5.8h,   v7.8h
        uqsub           v18.8h,  v0.8h,   v18.8h
        uqsub           v19.8h,  v0.8h,   v19.8h
        ushr            v18.8h,  v18.8h,  #8
        ushr            v19.8h,  v19.8h,  #8
        shl             v20.8h,  v18.8h,  #9
        shl             v21.8h,  v19.8h,  #9
        sqdmulh         v20.8h,  v20.8h,  v16.8h
        sqdmulh         v21.8h,  v21.8h,  v17.8h
        add             v20.8h,  v20.8h,  v4.8h
        add             v21.8h,  v21.8h,  v5.8h
        sqrshrun        v22.8b,  v20.8h,  #4
        sqrshrun        v23.8b,  v21.8h,  #4
.if \type == 444
        xtn             v18.8b,   v18.8h
        xtn2            v18.16b,  v19.8h
        sub             v18.16b,  v1.16b,  v18.16b
        st1             {v18.16b}, [x6],  #16
.elseif \type == 422
        addp            v18.8h,   v18.8h,  v19.8h
        xtn             v18.8b,   v18.8h
        uhsub           v18.8b,   v3.8b,   v18.8b
        st1             {v18.8b},  [x6],  #8
.elseif \type == 420
        trn1            v24.2d,   v18.2d,  v19.2d
        trn2            v25.2d,   v18.2d,  v19.2d
        add             v24.8h,   v24.8h,  v25.8h
        addp            v18.8h,   v24.8h,  v24.8h
        sub             v18.4h,   v3.4h,   v18.4h
        rshrn           v18.8b,   v18.8h,  #2
        st1             {v18.s}[0],  [x6],  #4
.endif
        st1             {v22.s}[0],  [x0],  x1
        st1             {v22.s}[1],  [x12], x1
        st1             {v23.s}[0],  [x0],  x1
        st1             {v23.s}[1],  [x12], x1
        b.gt            4b
        ret
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        ld1             {v4.8h,   v5.8h},   [x2],  #32
        ld1             {v6.8h,   v7.8h},   [x3],  #32
        subs            w5,  w5,  #2
        sub             v16.8h,  v6.8h,   v4.8h
        sub             v17.8h,  v7.8h,   v5.8h
        sabd            v18.8h,  v4.8h,   v6.8h
        sabd            v19.8h,  v5.8h,   v7.8h
        uqsub           v18.8h,  v0.8h,   v18.8h
        uqsub           v19.8h,  v0.8h,   v19.8h
        ushr            v18.8h,  v18.8h,  #8
        ushr            v19.8h,  v19.8h,  #8
        shl             v20.8h,  v18.8h,  #9
        shl             v21.8h,  v19.8h,  #9
        sqdmulh         v20.8h,  v20.8h,  v16.8h
        sqdmulh         v21.8h,  v21.8h,  v17.8h
        add             v20.8h,  v20.8h,  v4.8h
        add             v21.8h,  v21.8h,  v5.8h
        sqrshrun        v22.8b,  v20.8h,  #4
        sqrshrun        v23.8b,  v21.8h,  #4
.if \type == 444
        xtn             v18.8b,  v18.8h
        xtn2            v18.16b, v19.8h
        sub             v18.16b, v1.16b,  v18.16b
        st1             {v18.16b}, [x6],  #16
.elseif \type == 422
        addp            v18.8h,  v18.8h,  v19.8h
        xtn             v18.8b,  v18.8h
        uhsub           v18.8b,  v3.8b,   v18.8b
        st1             {v18.8b},  [x6],  #8
.elseif \type == 420
        add             v18.8h,  v18.8h,  v19.8h
        addp            v18.8h,  v18.8h,  v18.8h
        sub             v18.4h,  v3.4h,   v18.4h
        rshrn           v18.8b,  v18.8h,  #2
        st1             {v18.s}[0],  [x6],  #4
.endif
        st1             {v22.8b},  [x0],  x1
        st1             {v23.8b},  [x12], x1
        b.gt            8b
        ret
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        mov             w11, w4
        sub             x1,  x1,  w4,  uxtw
.if \type == 444
        add             x10, x6,  w4,  uxtw
.elseif \type == 422
        add             x10, x6,  x11, lsr #1
.endif
        add             x9,  x3,  w4,  uxtw #1
        add             x7,  x2,  w4,  uxtw #1
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        mov             w8,  w4
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        ld1             {v4.8h,   v5.8h},   [x2],  #32
        ld1             {v6.8h,   v7.8h},   [x3],  #32
        ld1             {v16.8h,  v17.8h},  [x7],  #32
        ld1             {v18.8h,  v19.8h},  [x9],  #32
        subs            w8,  w8,  #16
        sub             v6.8h,   v6.8h,   v4.8h
        sub             v7.8h,   v7.8h,   v5.8h
        sub             v18.8h,  v18.8h,  v16.8h
        sub             v19.8h,  v19.8h,  v17.8h
        abs             v20.8h,  v6.8h
        abs             v21.8h,  v7.8h
        abs             v22.8h,  v18.8h
        abs             v23.8h,  v19.8h
        uqsub           v20.8h,  v0.8h,   v20.8h
        uqsub           v21.8h,  v0.8h,   v21.8h
        uqsub           v22.8h,  v0.8h,   v22.8h
        uqsub           v23.8h,  v0.8h,   v23.8h
        ushr            v20.8h,  v20.8h,  #8
        ushr            v21.8h,  v21.8h,  #8
        ushr            v22.8h,  v22.8h,  #8
        ushr            v23.8h,  v23.8h,  #8
        shl             v24.8h,  v20.8h,  #9
        shl             v25.8h,  v21.8h,  #9
        shl             v26.8h,  v22.8h,  #9
        shl             v27.8h,  v23.8h,  #9
        sqdmulh         v24.8h,  v24.8h,  v6.8h
        sqdmulh         v25.8h,  v25.8h,  v7.8h
        sqdmulh         v26.8h,  v26.8h,  v18.8h
        sqdmulh         v27.8h,  v27.8h,  v19.8h
        add             v24.8h,  v24.8h,  v4.8h
        add             v25.8h,  v25.8h,  v5.8h
        add             v26.8h,  v26.8h,  v16.8h
        add             v27.8h,  v27.8h,  v17.8h
        sqrshrun        v24.8b,  v24.8h,  #4
        sqrshrun        v25.8b,  v25.8h,  #4
        sqrshrun        v26.8b,  v26.8h,  #4
        sqrshrun        v27.8b,  v27.8h,  #4
.if \type == 444
        xtn             v20.8b,  v20.8h
        xtn2            v20.16b, v21.8h
        xtn             v21.8b,  v22.8h
        xtn2            v21.16b, v23.8h
        sub             v20.16b, v1.16b,  v20.16b
        sub             v21.16b, v1.16b,  v21.16b
        st1             {v20.16b}, [x6],  #16
        st1             {v21.16b}, [x10], #16
.elseif \type == 422
        addp            v20.8h,  v20.8h,  v21.8h
        addp            v21.8h,  v22.8h,  v23.8h
        xtn             v20.8b,  v20.8h
        xtn             v21.8b,  v21.8h
        uhsub           v20.8b,  v3.8b,   v20.8b
        uhsub           v21.8b,  v3.8b,   v21.8b
        st1             {v20.8b},  [x6],  #8
        st1             {v21.8b},  [x10], #8
.elseif \type == 420
        add             v20.8h,  v20.8h,  v22.8h
        add             v21.8h,  v21.8h,  v23.8h
        addp            v20.8h,  v20.8h,  v21.8h
        sub             v20.8h,  v3.8h,   v20.8h
        rshrn           v20.8b,  v20.8h,  #2
        st1             {v20.8b},  [x6],  #8
.endif
        st1             {v24.8b,  v25.8b},  [x0],  #16
        st1             {v26.8b,  v27.8b},  [x12], #16
        b.gt            16b
        subs            w5,  w5,  #2
        add             x2,  x2,  w4,  uxtw #1
        add             x3,  x3,  w4,  uxtw #1
        add             x7,  x7,  w4,  uxtw #1
        add             x9,  x9,  w4,  uxtw #1
.if \type == 444
        add             x6,  x6,  w4,  uxtw
        add             x10, x10, w4,  uxtw
.elseif \type == 422
        add             x6,  x6,  x11, lsr #1
        add             x10, x10, x11, lsr #1
.endif
        add             x0,  x0,  x1
        add             x12, x12, x1
        b.gt            161b
        ret
L(w_mask_\type\()_tbl):
        .hword L(w_mask_\type\()_tbl) - 1280b
        .hword L(w_mask_\type\()_tbl) -  640b
        .hword L(w_mask_\type\()_tbl) -  320b
        .hword L(w_mask_\type\()_tbl) -  160b
        .hword L(w_mask_\type\()_tbl) -    8b
        .hword L(w_mask_\type\()_tbl) -    4b
endfunc
.endm

w_mask_fn 444
w_mask_fn 422
w_mask_fn 420


420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
function blend_8bpc_neon, export=1
        adr             x6,  L(blend_tbl)
        clz             w3,  w3
        sub             w3,  w3,  #26
        ldrh            w3,  [x6,  x3,  lsl #1]
        sub             x6,  x6,  w3,  uxtw
        movi            v4.16b,  #64
        add             x8,  x0,  x1
        lsl             w1,  w1,  #1
        br              x6
4:
        ld1             {v2.d}[0],   [x5],  #8
        ld1             {v1.d}[0],   [x2],  #8
        ld1             {v0.s}[0],   [x0]
        subs            w4,  w4,  #2
        ld1             {v0.s}[1],   [x8]
        sub             v3.8b,   v4.8b,   v2.8b
        umull           v5.8h,   v1.8b,   v2.8b
        umlal           v5.8h,   v0.8b,   v3.8b
        rshrn           v6.8b,   v5.8h,   #6
        st1             {v6.s}[0],   [x0],  x1
        st1             {v6.s}[1],   [x8],  x1
        b.gt            4b
        ret
8:
        ld1             {v2.2d},   [x5],  #16
        ld1             {v1.2d},   [x2],  #16
        ld1             {v0.d}[0],   [x0]
        ld1             {v0.d}[1],   [x8]
        sub             v3.16b,  v4.16b,  v2.16b
        subs            w4,  w4,  #2
        umull           v5.8h,   v1.8b,   v2.8b
        umlal           v5.8h,   v0.8b,   v3.8b
        umull2          v6.8h,   v1.16b,  v2.16b
        umlal2          v6.8h,   v0.16b,  v3.16b
        rshrn           v7.8b,   v5.8h,   #6
        rshrn2          v7.16b,  v6.8h,   #6
        st1             {v7.d}[0],   [x0],  x1
        st1             {v7.d}[1],   [x8],  x1
        b.gt            8b
        ret
16:
        ld1             {v1.2d,   v2.2d},   [x5],  #32
        ld1             {v5.2d,   v6.2d},   [x2],  #32
        ld1             {v0.2d},   [x0]
        subs            w4,  w4,  #2
        sub             v7.16b,  v4.16b,  v1.16b
        sub             v20.16b, v4.16b,  v2.16b
        ld1             {v3.2d},   [x8]
        umull           v16.8h,  v5.8b,   v1.8b
        umlal           v16.8h,  v0.8b,   v7.8b
        umull2          v17.8h,  v5.16b,  v1.16b
        umlal2          v17.8h,  v0.16b,  v7.16b
        umull           v21.8h,  v6.8b,   v2.8b
        umlal           v21.8h,  v3.8b,   v20.8b
        umull2          v22.8h,  v6.16b,  v2.16b
        umlal2          v22.8h,  v3.16b,  v20.16b
        rshrn           v18.8b,  v16.8h,  #6
        rshrn2          v18.16b, v17.8h,  #6
        rshrn           v19.8b,  v21.8h,  #6
        rshrn2          v19.16b, v22.8h,  #6
        st1             {v18.2d},  [x0],  x1
        st1             {v19.2d},  [x8],  x1
        b.gt            16b
        ret
32:
        ld1             {v0.2d,   v1.2d,   v2.2d,   v3.2d},   [x5],  #64
        ld1             {v16.2d,  v17.2d,  v18.2d,  v19.2d},  [x2],  #64
        ld1             {v20.2d,  v21.2d},  [x0]
        subs            w4,  w4,  #2
        ld1             {v22.2d,  v23.2d},  [x8]
        sub             v5.16b,  v4.16b,  v0.16b
        sub             v6.16b,  v4.16b,  v1.16b
        sub             v30.16b, v4.16b,  v2.16b
        sub             v31.16b, v4.16b,  v3.16b
        umull           v24.8h,  v16.8b,  v0.8b
        umlal           v24.8h,  v20.8b,  v5.8b
        umull2          v26.8h,  v16.16b, v0.16b
        umlal2          v26.8h,  v20.16b, v5.16b
        umull           v28.8h,  v17.8b,  v1.8b
        umlal           v28.8h,  v21.8b,  v6.8b
        umull2          v7.8h,   v17.16b, v1.16b
        umlal2          v7.8h,   v21.16b, v6.16b
        umull           v27.8h,  v18.8b,  v2.8b
        umlal           v27.8h,  v22.8b,  v30.8b
        umull2          v1.8h,   v18.16b, v2.16b
        umlal2          v1.8h,   v22.16b, v30.16b
        umull           v29.8h,  v19.8b,  v3.8b
        umlal           v29.8h,  v23.8b,  v31.8b
        umull2          v21.8h,  v19.16b, v3.16b
        umlal2          v21.8h,  v23.16b, v31.16b
        rshrn           v24.8b,  v24.8h,  #6
        rshrn2          v24.16b, v26.8h,  #6
        rshrn           v25.8b,  v28.8h,  #6
        rshrn2          v25.16b, v7.8h,   #6
        rshrn           v27.8b,  v27.8h,  #6
        rshrn2          v27.16b, v1.8h,   #6
        rshrn           v28.8b,  v29.8h,  #6
        rshrn2          v28.16b, v21.8h,  #6
        st1             {v24.2d, v25.2d}, [x0],  x1
        st1             {v27.2d, v28.2d}, [x8],  x1
        b.gt            32b
        ret
L(blend_tbl):
        .hword L(blend_tbl) - 32b
        .hword L(blend_tbl) - 16b
        .hword L(blend_tbl) -  8b
        .hword L(blend_tbl) -  4b
endfunc

function blend_h_8bpc_neon, export=1
        adr             x6, L(blend_h_tbl)
        movrel          x5,  X(obmc_masks)
        add             x5,  x5,  w4,  uxtw
        sub             w4,  w4,  w4,  lsr #2
        clz             w7,  w3
        movi            v4.16b,  #64
        add             x8,  x0,  x1
        lsl             x1,  x1,  #1
        sub             w7,  w7,  #24
        ldrh            w7,  [x6,  x7,  lsl #1]
        sub             x6,  x6,  w7, uxtw
        br              x6
2:
        ld1             {v0.h}[0],   [x5],  #2
        ld1             {v1.s}[0],   [x2],  #4
        subs            w4,  w4,  #2
        ld1             {v2.h}[0],   [x0]
        zip1            v0.8b,   v0.8b,   v0.8b
        sub             v3.8b,   v4.8b,   v0.8b
        ld1             {v2.h}[1],   [x8]
        umull           v5.8h,   v1.8b,   v0.8b
        umlal           v5.8h,   v2.8b,   v3.8b
        rshrn           v5.8b,   v5.8h,   #6
        st1             {v5.h}[0],   [x0],  x1
        st1             {v5.h}[1],   [x8],  x1
        b.gt            2b
        ret
4:
        ld2r            {v0.8b,   v1.8b},   [x5],  #2
        ld1             {v2.2s},   [x2],  #8
        subs            w4,  w4,  #2
        ext             v0.8b,   v0.8b,   v1.8b,   #4
        ld1             {v3.s}[0],   [x0]
        sub             v5.8b,   v4.8b,   v0.8b
        ld1             {v3.s}[1],   [x8]
        umull           v6.8h,   v2.8b,   v0.8b
        umlal           v6.8h,   v3.8b,   v5.8b
        rshrn           v6.8b,   v6.8h,   #6
        st1             {v6.s}[0],   [x0],  x1
        st1             {v6.s}[1],   [x8],  x1
        b.gt            4b
        ret
8:
        ld2r            {v0.16b,  v1.16b},  [x5],  #2
        ld1             {v2.16b},  [x2],  #16
        ld1             {v3.d}[0],   [x0]
        ext             v0.16b,  v0.16b,  v1.16b,  #8
        sub             v5.16b,  v4.16b,  v0.16b
        ld1             {v3.d}[1],   [x8]
        subs            w4,  w4,  #2
        umull           v6.8h,   v0.8b,   v2.8b
        umlal           v6.8h,   v3.8b,   v5.8b
        umull2          v7.8h,   v0.16b,  v2.16b
        umlal2          v7.8h,   v3.16b,  v5.16b
        rshrn           v16.8b,  v6.8h,   #6
        rshrn2          v16.16b, v7.8h,   #6
        st1             {v16.d}[0],  [x0],  x1
        st1             {v16.d}[1],  [x8],  x1
        b.gt            8b
        ret
16:
        ld2r            {v0.16b,  v1.16b},  [x5],  #2
        ld1             {v2.16b,  v3.16b},  [x2],  #32
        ld1             {v5.16b},  [x0]
        sub             v7.16b,  v4.16b,  v0.16b
        sub             v16.16b, v4.16b,  v1.16b
        ld1             {v6.16b},  [x8]
        subs            w4,  w4,  #2
        umull           v17.8h,  v0.8b,   v2.8b
        umlal           v17.8h,  v5.8b,   v7.8b
        umull2          v18.8h,  v0.16b,  v2.16b
        umlal2          v18.8h,  v5.16b,  v7.16b
        umull           v19.8h,  v1.8b,   v3.8b
        umlal           v19.8h,  v6.8b,   v16.8b
        umull2          v20.8h,  v1.16b,  v3.16b
        umlal2          v20.8h,  v6.16b,  v16.16b
        rshrn           v21.8b,  v17.8h,  #6
        rshrn2          v21.16b, v18.8h,  #6
        rshrn           v22.8b,  v19.8h,  #6
        rshrn2          v22.16b, v20.8h,  #6
        st1             {v21.16b}, [x0],  x1
        st1             {v22.16b}, [x8],  x1
        b.gt            16b
        ret
1280:
640:
320:
        sub             x1,  x1,  w3,  uxtw
        add             x7,  x2,  w3,  uxtw
321:
        ld2r            {v0.16b,  v1.16b},  [x5],  #2
        mov             w6,  w3
        sub             v20.16b, v4.16b,  v0.16b
        sub             v21.16b, v4.16b,  v1.16b
32:
        ld1             {v16.16b, v17.16b}, [x2],  #32
        ld1             {v2.16b,  v3.16b},  [x0]
        subs            w6,  w6,  #32
        umull           v23.8h,  v0.8b,   v16.8b
        umlal           v23.8h,  v2.8b,   v20.8b
        ld1             {v18.16b, v19.16b}, [x7],  #32
        umull2          v27.8h,  v0.16b,  v16.16b
        umlal2          v27.8h,  v2.16b,  v20.16b
        ld1             {v6.16b,  v7.16b},  [x8]
        umull           v24.8h,  v0.8b,   v17.8b
        umlal           v24.8h,  v3.8b,   v20.8b
        umull2          v28.8h,  v0.16b,  v17.16b
        umlal2          v28.8h,  v3.16b,  v20.16b
        umull           v25.8h,  v1.8b,   v18.8b
        umlal           v25.8h,  v6.8b,   v21.8b
        umull2          v5.8h,   v1.16b,  v18.16b
        umlal2          v5.8h,   v6.16b,  v21.16b
        rshrn           v29.8b,  v23.8h,  #6
        rshrn2          v29.16b, v27.8h,  #6
        umull           v26.8h,  v1.8b,   v19.8b
        umlal           v26.8h,  v7.8b,   v21.8b
        umull2          v31.8h,  v1.16b,  v19.16b
        umlal2          v31.8h,  v7.16b,  v21.16b
        rshrn           v30.8b,  v24.8h,  #6
        rshrn2          v30.16b, v28.8h,  #6
        rshrn           v23.8b,  v25.8h,  #6
        rshrn2          v23.16b, v5.8h,   #6
        rshrn           v24.8b,  v26.8h,  #6
        st1             {v29.16b, v30.16b}, [x0],  #32
        rshrn2          v24.16b, v31.8h,  #6
        st1             {v23.16b, v24.16b}, [x8],  #32
        b.gt            32b
        subs            w4,  w4,  #2
        add             x0,  x0,  x1
        add             x8,  x8,  x1
        add             x2,  x2,  w3,  uxtw
        add             x7,  x7,  w3,  uxtw
        b.gt            321b
        ret
L(blend_h_tbl):
        .hword L(blend_h_tbl) - 1280b
        .hword L(blend_h_tbl) -  640b
        .hword L(blend_h_tbl) -  320b
        .hword L(blend_h_tbl) -   16b
        .hword L(blend_h_tbl) -    8b
        .hword L(blend_h_tbl) -    4b
        .hword L(blend_h_tbl) -    2b
endfunc

function blend_v_8bpc_neon, export=1
        adr             x6,  L(blend_v_tbl)
        movrel          x5,  X(obmc_masks)
        add             x5,  x5,  w3,  uxtw
        clz             w3,  w3
        movi            v4.16b,  #64
        add             x8,  x0,  x1
        lsl             x1,  x1,  #1
        sub             w3,  w3,  #26
        ldrh            w3,  [x6,  x3,  lsl #1]
        sub             x6,  x6,  w3,  uxtw
        br              x6
20:
        ld1r            {v0.8b},   [x5]
        sub             v1.8b,   v4.8b,   v0.8b
2:
        ld1             {v2.h}[0],   [x2],  #2
        ld1             {v3.b}[0],   [x0]
        subs            w4,  w4,  #2
        ld1             {v2.b}[1],   [x2]
        ld1             {v3.b}[1],   [x8]
        umull           v5.8h,   v2.8b,   v0.8b
        umlal           v5.8h,   v3.8b,   v1.8b
        rshrn           v5.8b,   v5.8h,   #6
        add             x2,  x2,  #2
        st1             {v5.b}[0],   [x0],  x1
        st1             {v5.b}[1],   [x8],  x1
        b.gt            2b
        ret
40:
        ld1r            {v0.2s},   [x5]
        sub             v1.8b,   v4.8b,   v0.8b
        sub             x1,  x1,  #3
4:
        ld1             {v2.8b},   [x2],  #8
        ld1             {v3.s}[0],   [x0]
        ld1             {v3.s}[1],   [x8]
        subs            w4,  w4,  #2
        umull           v5.8h,   v2.8b,   v0.8b
        umlal           v5.8h,   v3.8b,   v1.8b
        rshrn           v5.8b,   v5.8h,   #6
        st1             {v5.h}[0],   [x0],  #2
        st1             {v5.h}[2],   [x8],  #2
        st1             {v5.b}[2],   [x0],  #1
        st1             {v5.b}[6],   [x8],  #1
        add             x0,  x0,  x1
        add             x8,  x8,  x1
        b.gt            4b
        ret
80:
        ld1r            {v0.2d},   [x5]
        sub             v1.16b,  v4.16b,  v0.16b
        sub             x1,  x1,  #6
8:
        ld1             {v2.16b},  [x2],  #16
        ld1             {v3.d}[0],   [x0]
        ld1             {v3.d}[1],   [x8]
        subs            w4,  w4,  #2
        umull           v5.8h,  v0.8b,  v2.8b
        umlal           v5.8h,  v3.8b,  v1.8b
        umull2          v6.8h,  v0.16b, v2.16b
        umlal2          v6.8h,  v3.16b, v1.16b
        rshrn           v7.8b,  v5.8h,  #6
        rshrn2          v7.16b, v6.8h,  #6
        st1             {v7.s}[0],   [x0],  #4
        st1             {v7.s}[2],   [x8],  #4
        st1             {v7.h}[2],   [x0],  #2
        st1             {v7.h}[6],   [x8],  #2
        add             x0,  x0,  x1
        add             x8,  x8,  x1
        b.gt            8b
        ret
160:
        ld1             {v0.16b},  [x5]
        sub             v2.16b,  v4.16b,  v0.16b
        sub             x1,  x1,  #12
16:
        ld1             {v5.16b,  v6.16b},  [x2],  #32
        ld1             {v7.16b},  [x0]
        subs            w4,  w4,  #2
        ld1             {v16.16b}, [x8]
        umull           v17.8h,  v5.8b,   v0.8b
        umlal           v17.8h,  v7.8b,   v2.8b
        umull2          v18.8h,  v5.16b,  v0.16b
        umlal2          v18.8h,  v7.16b,  v2.16b
        umull           v20.8h,  v6.8b,   v0.8b
        umlal           v20.8h,  v16.8b,  v2.8b
        umull2          v21.8h,  v6.16b,  v0.16b
        umlal2          v21.8h,  v16.16b, v2.16b
        rshrn           v19.8b,  v17.8h,  #6
        rshrn2          v19.16b, v18.8h,  #6
        rshrn           v22.8b,  v20.8h,  #6
        rshrn2          v22.16b, v21.8h,  #6
        st1             {v19.8b},  [x0],  #8
        st1             {v22.8b},  [x8],  #8
        st1             {v19.s}[2],  [x0],  #4
        st1             {v22.s}[2],  [x8],  #4
        add             x0,  x0,  x1
        add             x8,  x8,  x1
        b.gt            16b
        ret
320:
        ld1             {v0.16b,  v1.16b},  [x5]
        sub             v2.16b,  v4.16b,  v0.16b
        sub             v3.16b,  v4.16b,  v1.16b
        sub             x1,  x1,  #24
32:
        ld1             {v16.16b, v17.16b, v18.16b, v19.16b}, [x2],  #64
        ld1             {v5.16b,  v6.16b},  [x0]
        subs            w4,  w4,  #2
        ld1             {v20.16b, v21.16b}, [x8]
        umull           v22.8h,  v16.8b,  v0.8b
        umlal           v22.8h,  v5.8b,   v2.8b
        umull2          v23.8h,  v16.16b, v0.16b
        umlal2          v23.8h,  v5.16b,  v2.16b
        umull           v28.8h,  v17.8b,  v1.8b
        umlal           v28.8h,  v6.8b,   v3.8b
        umull2          v29.8h,  v17.16b, v1.16b
        umlal2          v29.8h,  v6.16b,  v3.16b
        umull           v30.8h,  v18.8b,  v0.8b
        umlal           v30.8h,  v20.8b,  v2.8b
        umull2          v31.8h,  v18.16b, v0.16b
        umlal2          v31.8h,  v20.16b, v2.16b
        umull           v25.8h,  v19.8b,  v1.8b
        umlal           v25.8h,  v21.8b,  v3.8b
        umull2          v26.8h,  v19.16b, v1.16b
        umlal2          v26.8h,  v21.16b, v3.16b
        rshrn           v24.8b,  v22.8h,  #6
        rshrn2          v24.16b, v23.8h,  #6
        rshrn           v28.8b,  v28.8h,  #6
        rshrn2          v28.16b, v29.8h,  #6
        rshrn           v30.8b,  v30.8h,  #6
        rshrn2          v30.16b, v31.8h,  #6
        rshrn           v27.8b,  v25.8h,  #6
        rshrn2          v27.16b, v26.8h,  #6
        st1             {v24.16b}, [x0],  #16
        st1             {v30.16b}, [x8],  #16
        st1             {v28.8b},  [x0],  #8
        st1             {v27.8b},  [x8],  #8
        add             x0,  x0,  x1
        add             x8,  x8,  x1
        b.gt            32b
        ret
L(blend_v_tbl):
        .hword L(blend_v_tbl) - 320b
        .hword L(blend_v_tbl) - 160b
        .hword L(blend_v_tbl) -  80b
        .hword L(blend_v_tbl) -  40b
        .hword L(blend_v_tbl) -  20b
endfunc


827
// This has got the same signature as the put_8tap functions,
Martin Storsjö's avatar
Martin Storsjö committed
828
// and assumes that x8 is set to (clz(w)-24).
829
function put_neon
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        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,
Martin Storsjö's avatar
Martin Storsjö committed
923
// and assumes that x8 is set to (clz(w)-24), and x7 to w*2.
924
function prep_neon
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        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
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// Interleaving the mul/mla chains actually hurts performance
// significantly on Cortex A53, thus keeping mul/mla tightly
// chained like this.
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.macro mul_mla_8_1 d0, d1, s0, s1, s2, s3, s4, s5, s6, s7, s8
        mul             \d0\().8h, \s0\().8h, v0.h[0]
        mla             \d0\().8h, \s1\().8h, v0.h[1]
        mla             \d0\().8h, \s2\().8h, v0.h[2]
        mla             \d0\().8h, \s3\().8h, v0.h[3]
        mla             \d0\().8h, \s4\().8h, v0.h[4]
        mla             \d0\().8h, \s5\().8h, v0.h[5]
        mla             \d0\().8h, \s6\().8h, v0.h[6]
        mla             \d0\().8h, \s7\().8h, v0.h[7]
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        mul             \d1\().8h, \s1\().8h, v0.h[0]
        mla             \d1\().8h, \s2\().8h, v0.h[1]
        mla             \d1\().8h, \s3\().8h, v0.h[2]
        mla             \d1\().8h, \s4\().8h, v0.h[3]
        mla             \d1\().8h, \s5\().8h, v0.h[4]
        mla             \d1\().8h, \s6\().8h, v0.h[5]
        mla             \d1\().8h, \s7\().8h, v0.h[6]
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        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]
        mla             \d0\().8h, \s1\().8h, v0.h[1]
        mla             \d0\().8h, \s2\().8h, v0.h[2]
        mla             \d0\().8h, \s3\().8h, v0.h[3]
        mla             \d0\().8h, \s4\().8h, v0.h[4]
        mla             \d0\().8h, \s5\().8h, v0.h[5]
        mla             \d0\().8h, \s6\().8h, v0.h[6]
        mla             \d0\().8h, \s7\().8h, v0.h[7]
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        mul             \d1\().8h, \s2\().8h, v0.h[0]
        mla             \d1\().8h, \s3\().8h, v0.h[1]
        mla             \d1\().8h, \s4\().8h, v0.h[2]
        mla             \d1\().8h, \s5\().8h, v0.h[3]
        mla             \d1\().8h, \s6\().8h, v0.h[4]
        mla             \d1\().8h, \s7\().8h, v0.h[5]
        mla             \d1\().8h, \s8\().8h, v0.h[6]
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        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]
        mla             \d0\().8h, \s1\().8h,  v0.h[1]
        mla             \d0\().8h, \s2\().8h,  v0.h[2]
        mla             \d0\().8h, \s3\().8h,  v0.h[3]
        mla             \d0\().8h, \s4\().8h,  v0.h[4]
        mla             \d0\().8h, \s5\().8h,  v0.h[5]
        mla             \d0\().8h, \s6\().8h,  v0.h[6]
        mla             \d0\().8h, \s7\().8h,  v0.h[7]
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        mul             \d1\().8h, \s4\().8h,  v0.h[0]
        mla             \d1\().8h, \s5\().8h,  v0.h[1]
        mla             \d1\().8h, \s6\().8h,  v0.h[2]
        mla             \d1\().8h, \s7\().8h,  v0.h[3]
        mla             \d1\().8h, \s8\().8h,  v0.h[4]
        mla             \d1\().8h, \s9\().8h,  v0.h[5]
        mla             \d1\().8h, \s10\().8h, v0.h[6]
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        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
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.macro st_s strd, r0, r1
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        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
1232
.macro st_d strd, r0, r1
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        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
1240
.macro shift_store_4 type, strd, r0, r1
1241
.ifc \type, put
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        sqrshrun_b      6,     \r0, \r1
        st_s            \strd, \r0, \r1
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.else
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        srshr_h         2,     \r0, \r1
        st_d            \strd, \r0, \r1
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.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
1296
        b               \op\()_8tap_neon
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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

1316
function \type\()_8tap_neon
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        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)
1334
        b               \type\()_neon
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L(\type\()_8tap_h):
        cmp             \w,  #4
1338
        ubfx            w9,  \mx, #7, #7
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