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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
        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
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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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        \type           v4,  v0,  v1
        ldrh            w4,  [x7, x4, lsl #1]
        \type           v5,  v2,  v3
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        sub             x7,  x7,  w4, uxtw
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        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
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        trn1            v4.2d,  v4.2d,  v5.2d
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        \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
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        trn1            v4.2d,  v4.2d,  v5.2d
        add             x7,  x0,  x1
        lsl             x1,  x1,  #1
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        \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
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        trn1            v4.2d,  v4.2d,  v5.2d
        add             x7,  x0,  x1
        lsl             x1,  x1,  #1
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        \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
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        trn1            v4.2d,  v4.2d,  v5.2d
        add             x7,  x0,  #64
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        \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
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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
        .hword L(\type\()_tbl) -  160b
        .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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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
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        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


644
// This has got the same signature as the put_8tap functions,
Martin Storsjö's avatar
Martin Storsjö committed
645
// and assumes that x8 is set to (clz(w)-24).
646
function put_neon
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
        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
740
// and assumes that x8 is set to (clz(w)-24), and x7 to w*2.
741
function prep_neon
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955
        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
956 957 958
// Interleaving the mul/mla chains actually hurts performance
// significantly on Cortex A53, thus keeping mul/mla tightly
// chained like this.
959 960 961 962 963 964 965 966 967
.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]
968 969 970 971 972 973 974
        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]
975 976 977 978 979 980 981 982 983 984 985
        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]
986 987 988 989 990 991 992
        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]
993 994 995 996 997 998 999 1000 1001 1002 1003
        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]
1004 1005 1006 1007 1008 1009 1010
        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]
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
        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
1041
.macro st_s strd, r0, r1
1042 1043 1044 1045 1046 1047 1048
        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
1049
.macro st_d strd, r0, r1
1050 1051 1052 1053 1054 1055 1056
        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
1057
.macro shift_store_4 type, strd, r0, r1
1058
.ifc \type, put
1059 1060
        sqrshrun_b      6,     \r0, \r1
        st_s            \strd, \r0, \r1
1061
.else
1062 1063
        srshr_h         2,     \r0, \r1
        st_d            \strd, \r0, \r1
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
.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
1113
        b               \op\()_8tap_neon
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
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

1133
function \type\()_8tap_neon
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
        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)
1151
        b               \type\()_neon
1152 1153 1154

L(\type\()_8tap_h):
        cmp             \w,  #4
1155
        ubfx            w9,  \mx, #7, #7
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
        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
1378
        ubfx            w9,  \my, #7, #7
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528
        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, \