Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 657 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/aarch64/vp9mc_neon.S b/media/ffvpx/libavcodec/aarch64/vp9mc_neon.S
new file mode 100644
index 0000000000..abf2bae9db
--- /dev/null
+++ b/media/ffvpx/libavcodec/aarch64/vp9mc_neon.S
@@ -0,0 +1,657 @@
+/*
+ * Copyright (c) 2016 Google Inc.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/aarch64/asm.S"
+
+// All public functions in this file have the following signature:
+// typedef void (*vp9_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
+//                            const uint8_t *ref, ptrdiff_t ref_stride,
+//                            int h, int mx, int my);
+
+function ff_vp9_avg64_neon, export=1
+        mov             x5,  x0
+1:
+        ld1             {v4.16b,  v5.16b,  v6.16b,  v7.16b},  [x2], x3
+        ld1             {v0.16b,  v1.16b,  v2.16b,  v3.16b},  [x0], x1
+        ld1             {v20.16b, v21.16b, v22.16b, v23.16b}, [x2], x3
+        urhadd          v0.16b,  v0.16b,  v4.16b
+        urhadd          v1.16b,  v1.16b,  v5.16b
+        ld1             {v16.16b, v17.16b, v18.16b, v19.16b}, [x0], x1
+        urhadd          v2.16b,  v2.16b,  v6.16b
+        urhadd          v3.16b,  v3.16b,  v7.16b
+        subs            w4,  w4,  #2
+        urhadd          v16.16b, v16.16b, v20.16b
+        urhadd          v17.16b, v17.16b, v21.16b
+        st1             {v0.16b,  v1.16b,  v2.16b,  v3.16b},  [x5], x1
+        urhadd          v18.16b, v18.16b, v22.16b
+        urhadd          v19.16b, v19.16b, v23.16b
+        st1             {v16.16b, v17.16b, v18.16b, v19.16b}, [x5], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_avg32_neon, export=1
+1:
+        ld1             {v2.16b, v3.16b},  [x2], x3
+        ld1             {v0.16b, v1.16b},  [x0]
+        urhadd          v0.16b,  v0.16b,  v2.16b
+        urhadd          v1.16b,  v1.16b,  v3.16b
+        subs            w4,  w4,  #1
+        st1             {v0.16b, v1.16b},  [x0], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_copy16_neon, export=1
+        add             x5,  x0,  x1
+        lsl             x1,  x1,  #1
+        add             x6,  x2,  x3
+        lsl             x3,  x3,  #1
+1:
+        ld1             {v0.16b},  [x2], x3
+        ld1             {v1.16b},  [x6], x3
+        ld1             {v2.16b},  [x2], x3
+        ld1             {v3.16b},  [x6], x3
+        subs            w4,  w4,  #4
+        st1             {v0.16b},  [x0], x1
+        st1             {v1.16b},  [x5], x1
+        st1             {v2.16b},  [x0], x1
+        st1             {v3.16b},  [x5], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_avg16_neon, export=1
+        mov             x5,  x0
+1:
+        ld1             {v2.16b},  [x2], x3
+        ld1             {v0.16b},  [x0], x1
+        ld1             {v3.16b},  [x2], x3
+        urhadd          v0.16b,  v0.16b,  v2.16b
+        ld1             {v1.16b},  [x0], x1
+        urhadd          v1.16b,  v1.16b,  v3.16b
+        subs            w4,  w4,  #2
+        st1             {v0.16b},  [x5], x1
+        st1             {v1.16b},  [x5], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_copy8_neon, export=1
+1:
+        ld1             {v0.8b},  [x2], x3
+        ld1             {v1.8b},  [x2], x3
+        subs            w4,  w4,  #2
+        st1             {v0.8b},  [x0], x1
+        st1             {v1.8b},  [x0], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_avg8_neon, export=1
+        mov             x5,  x0
+1:
+        ld1             {v2.8b},  [x2], x3
+        ld1             {v0.8b},  [x0], x1
+        ld1             {v3.8b},  [x2], x3
+        urhadd          v0.8b,  v0.8b,  v2.8b
+        ld1             {v1.8b},  [x0], x1
+        urhadd          v1.8b,  v1.8b,  v3.8b
+        subs            w4,  w4,  #2
+        st1             {v0.8b},  [x5], x1
+        st1             {v1.8b},  [x5], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_copy4_neon, export=1
+1:
+        ld1             {v0.s}[0], [x2], x3
+        ld1             {v1.s}[0], [x2], x3
+        st1             {v0.s}[0], [x0], x1
+        ld1             {v2.s}[0], [x2], x3
+        st1             {v1.s}[0], [x0], x1
+        ld1             {v3.s}[0], [x2], x3
+        subs            w4,  w4,  #4
+        st1             {v2.s}[0], [x0], x1
+        st1             {v3.s}[0], [x0], x1
+        b.ne            1b
+        ret
+endfunc
+
+function ff_vp9_avg4_neon, export=1
+        mov             x5,  x0
+1:
+        ld1             {v2.s}[0], [x2], x3
+        ld1             {v0.s}[0], [x0], x1
+        ld1             {v2.s}[1], [x2], x3
+        ld1             {v0.s}[1], [x0], x1
+        ld1             {v3.s}[0], [x2], x3
+        ld1             {v1.s}[0], [x0], x1
+        ld1             {v3.s}[1], [x2], x3
+        ld1             {v1.s}[1], [x0], x1
+        subs            w4,  w4,  #4
+        urhadd          v0.8b,  v0.8b,  v2.8b
+        urhadd          v1.8b,  v1.8b,  v3.8b
+        st1             {v0.s}[0], [x5], x1
+        st1             {v0.s}[1], [x5], x1
+        st1             {v1.s}[0], [x5], x1
+        st1             {v1.s}[1], [x5], x1
+        b.ne            1b
+        ret
+endfunc
+
+
+// Extract a vector from src1-src2 and src4-src5 (src1-src3 and src4-src6
+// for size >= 16), and multiply-accumulate into dst1 and dst3 (or
+// dst1-dst2 and dst3-dst4 for size >= 16)
+.macro extmla dst1, dst2, dst3, dst4, src1, src2, src3, src4, src5, src6, offset, size
+        ext             v20.16b, \src1\().16b, \src2\().16b, #(2*\offset)
+        ext             v22.16b, \src4\().16b, \src5\().16b, #(2*\offset)
+.if \size >= 16
+        mla             \dst1\().8h, v20.8h, v0.h[\offset]
+        ext             v21.16b, \src2\().16b, \src3\().16b, #(2*\offset)
+        mla             \dst3\().8h, v22.8h, v0.h[\offset]
+        ext             v23.16b, \src5\().16b, \src6\().16b, #(2*\offset)
+        mla             \dst2\().8h, v21.8h, v0.h[\offset]
+        mla             \dst4\().8h, v23.8h, v0.h[\offset]
+.elseif \size == 8
+        mla             \dst1\().8h, v20.8h, v0.h[\offset]
+        mla             \dst3\().8h, v22.8h, v0.h[\offset]
+.else
+        mla             \dst1\().4h, v20.4h, v0.h[\offset]
+        mla             \dst3\().4h, v22.4h, v0.h[\offset]
+.endif
+.endm
+// The same as above, but don't accumulate straight into the
+// destination, but use a temp register and accumulate with saturation.
+.macro extmulqadd dst1, dst2, dst3, dst4, src1, src2, src3, src4, src5, src6, offset, size
+        ext             v20.16b, \src1\().16b, \src2\().16b, #(2*\offset)
+        ext             v22.16b, \src4\().16b, \src5\().16b, #(2*\offset)
+.if \size >= 16
+        mul             v20.8h, v20.8h, v0.h[\offset]
+        ext             v21.16b, \src2\().16b, \src3\().16b, #(2*\offset)
+        mul             v22.8h, v22.8h, v0.h[\offset]
+        ext             v23.16b, \src5\().16b, \src6\().16b, #(2*\offset)
+        mul             v21.8h, v21.8h, v0.h[\offset]
+        mul             v23.8h, v23.8h, v0.h[\offset]
+.elseif \size == 8
+        mul             v20.8h, v20.8h, v0.h[\offset]
+        mul             v22.8h, v22.8h, v0.h[\offset]
+.else
+        mul             v20.4h, v20.4h, v0.h[\offset]
+        mul             v22.4h, v22.4h, v0.h[\offset]
+.endif
+.if \size == 4
+        sqadd           \dst1\().4h, \dst1\().4h, v20.4h
+        sqadd           \dst3\().4h, \dst3\().4h, v22.4h
+.else
+        sqadd           \dst1\().8h, \dst1\().8h, v20.8h
+        sqadd           \dst3\().8h, \dst3\().8h, v22.8h
+.if \size >= 16
+        sqadd           \dst2\().8h, \dst2\().8h, v21.8h
+        sqadd           \dst4\().8h, \dst4\().8h, v23.8h
+.endif
+.endif
+.endm
+
+
+// Instantiate a horizontal filter function for the given size.
+// This can work on 4, 8 or 16 pixels in parallel; for larger
+// widths it will do 16 pixels at a time and loop horizontally.
+// The actual width is passed in x5, the height in w4 and the
+// filter coefficients in x9. idx2 is the index of the largest
+// filter coefficient (3 or 4) and idx1 is the other one of them.
+.macro do_8tap_h type, size, idx1, idx2
+function \type\()_8tap_\size\()h_\idx1\idx2
+        sub             x2,  x2,  #3
+        add             x6,  x0,  x1
+        add             x7,  x2,  x3
+        add             x1,  x1,  x1
+        add             x3,  x3,  x3
+        // Only size >= 16 loops horizontally and needs
+        // reduced dst stride
+.if \size >= 16
+        sub             x1,  x1,  x5
+.endif
+        // size >= 16 loads two qwords and increments x2,
+        // for size 4/8 it's enough with one qword and no
+        // postincrement
+.if \size >= 16
+        sub             x3,  x3,  x5
+        sub             x3,  x3,  #8
+.endif
+        // Load the filter vector
+        ld1             {v0.8h},  [x9]
+1:
+.if \size >= 16
+        mov             x9,  x5
+.endif
+        // Load src
+.if \size >= 16
+        ld1             {v4.8b,  v5.8b,  v6.8b},  [x2], #24
+        ld1             {v16.8b, v17.8b, v18.8b}, [x7], #24
+.else
+        ld1             {v4.8b,  v5.8b},  [x2]
+        ld1             {v16.8b, v17.8b}, [x7]
+.endif
+        uxtl            v4.8h,  v4.8b
+        uxtl            v5.8h,  v5.8b
+        uxtl            v16.8h, v16.8b
+        uxtl            v17.8h, v17.8b
+.if \size >= 16
+        uxtl            v6.8h,  v6.8b
+        uxtl            v18.8h, v18.8b
+.endif
+2:
+
+        // Accumulate, adding idx2 last with a separate
+        // saturating add. The positive filter coefficients
+        // for all indices except idx2 must add up to less
+        // than 127 for this not to overflow.
+        mul             v1.8h,  v4.8h,  v0.h[0]
+        mul             v24.8h, v16.8h, v0.h[0]
+.if \size >= 16
+        mul             v2.8h,  v5.8h,  v0.h[0]
+        mul             v25.8h, v17.8h, v0.h[0]
+.endif
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, 1,     \size
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, 2,     \size
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, \idx1, \size
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, 5,     \size
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, 6,     \size
+        extmla          v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, 7,     \size
+        extmulqadd      v1,  v2,  v24, v25, v4,  v5,  v6,  v16, v17, v18, \idx2, \size
+
+        // Round, shift and saturate
+        sqrshrun        v1.8b,   v1.8h,  #7
+        sqrshrun        v24.8b,  v24.8h, #7
+.if \size >= 16
+        sqrshrun2       v1.16b,  v2.8h,  #7
+        sqrshrun2       v24.16b, v25.8h, #7
+.endif
+        // Average
+.ifc \type,avg
+.if \size >= 16
+        ld1             {v2.16b}, [x0]
+        ld1             {v3.16b}, [x6]
+        urhadd          v1.16b,  v1.16b,  v2.16b
+        urhadd          v24.16b, v24.16b, v3.16b
+.elseif \size == 8
+        ld1             {v2.8b},  [x0]
+        ld1             {v3.8b},  [x6]
+        urhadd          v1.8b,  v1.8b,  v2.8b
+        urhadd          v24.8b, v24.8b, v3.8b
+.else
+        ld1             {v2.s}[0], [x0]
+        ld1             {v3.s}[0], [x6]
+        urhadd          v1.8b,  v1.8b,  v2.8b
+        urhadd          v24.8b, v24.8b, v3.8b
+.endif
+.endif
+        // Store and loop horizontally (for size >= 16)
+.if \size >= 16
+        subs            x9,  x9,  #16
+        st1             {v1.16b},  [x0], #16
+        st1             {v24.16b}, [x6], #16
+        b.eq            3f
+        mov             v4.16b,  v6.16b
+        mov             v16.16b, v18.16b
+        ld1             {v6.16b},  [x2], #16
+        ld1             {v18.16b}, [x7], #16
+        uxtl            v5.8h,  v6.8b
+        uxtl2           v6.8h,  v6.16b
+        uxtl            v17.8h, v18.8b
+        uxtl2           v18.8h, v18.16b
+        b               2b
+.elseif \size == 8
+        st1             {v1.8b},    [x0]
+        st1             {v24.8b},   [x6]
+.else // \size == 4
+        st1             {v1.s}[0],  [x0]
+        st1             {v24.s}[0], [x6]
+.endif
+3:
+        // Loop vertically
+        add             x0,  x0,  x1
+        add             x6,  x6,  x1
+        add             x2,  x2,  x3
+        add             x7,  x7,  x3
+        subs            w4,  w4,  #2
+        b.ne            1b
+        ret
+endfunc
+.endm
+
+.macro do_8tap_h_size size
+do_8tap_h put, \size, 3, 4
+do_8tap_h avg, \size, 3, 4
+do_8tap_h put, \size, 4, 3
+do_8tap_h avg, \size, 4, 3
+.endm
+
+do_8tap_h_size 4
+do_8tap_h_size 8
+do_8tap_h_size 16
+
+.macro do_8tap_h_func type, filter, offset, size
+function ff_vp9_\type\()_\filter\()\size\()_h_neon, export=1
+        movrel          x6,  X(ff_vp9_subpel_filters), 256*\offset
+        cmp             w5,  #8
+        add             x9,  x6,  w5, uxtw #4
+        mov             x5,  #\size
+.if \size >= 16
+        b.ge            \type\()_8tap_16h_34
+        b               \type\()_8tap_16h_43
+.else
+        b.ge            \type\()_8tap_\size\()h_34
+        b               \type\()_8tap_\size\()h_43
+.endif
+endfunc
+.endm
+
+.macro do_8tap_h_filters size
+do_8tap_h_func put, regular, 1, \size
+do_8tap_h_func avg, regular, 1, \size
+do_8tap_h_func put, sharp,   2, \size
+do_8tap_h_func avg, sharp,   2, \size
+do_8tap_h_func put, smooth,  0, \size
+do_8tap_h_func avg, smooth,  0, \size
+.endm
+
+do_8tap_h_filters 64
+do_8tap_h_filters 32
+do_8tap_h_filters 16
+do_8tap_h_filters 8
+do_8tap_h_filters 4
+
+
+// Vertical filters
+
+// Round, shift and saturate and store reg1-reg2 over 4 lines
+.macro do_store4 reg1, reg2, tmp1, tmp2, type
+        sqrshrun        \reg1\().8b,  \reg1\().8h, #7
+        sqrshrun        \reg2\().8b,  \reg2\().8h, #7
+.ifc \type,avg
+        ld1             {\tmp1\().s}[0],  [x7], x1
+        ld1             {\tmp2\().s}[0],  [x7], x1
+        ld1             {\tmp1\().s}[1],  [x7], x1
+        ld1             {\tmp2\().s}[1],  [x7], x1
+        urhadd          \reg1\().8b,  \reg1\().8b,  \tmp1\().8b
+        urhadd          \reg2\().8b,  \reg2\().8b,  \tmp2\().8b
+.endif
+        st1             {\reg1\().s}[0],  [x0], x1
+        st1             {\reg2\().s}[0],  [x0], x1
+        st1             {\reg1\().s}[1],  [x0], x1
+        st1             {\reg2\().s}[1],  [x0], x1
+.endm
+
+// Round, shift and saturate and store reg1-4
+.macro do_store reg1, reg2, reg3, reg4, tmp1, tmp2, tmp3, tmp4, type
+        sqrshrun        \reg1\().8b,  \reg1\().8h, #7
+        sqrshrun        \reg2\().8b,  \reg2\().8h, #7
+        sqrshrun        \reg3\().8b,  \reg3\().8h, #7
+        sqrshrun        \reg4\().8b,  \reg4\().8h, #7
+.ifc \type,avg
+        ld1             {\tmp1\().8b},  [x7], x1
+        ld1             {\tmp2\().8b},  [x7], x1
+        ld1             {\tmp3\().8b},  [x7], x1
+        ld1             {\tmp4\().8b},  [x7], x1
+        urhadd          \reg1\().8b,  \reg1\().8b,  \tmp1\().8b
+        urhadd          \reg2\().8b,  \reg2\().8b,  \tmp2\().8b
+        urhadd          \reg3\().8b,  \reg3\().8b,  \tmp3\().8b
+        urhadd          \reg4\().8b,  \reg4\().8b,  \tmp4\().8b
+.endif
+        st1             {\reg1\().8b},  [x0], x1
+        st1             {\reg2\().8b},  [x0], x1
+        st1             {\reg3\().8b},  [x0], x1
+        st1             {\reg4\().8b},  [x0], x1
+.endm
+
+// Evaluate the filter twice in parallel, from the inputs src1-src9 into dst1-dst2
+// (src1-src8 into dst1, src2-src9 into dst2), adding idx2 separately
+// at the end with saturation. Indices 0 and 7 always have negative or zero
+// coefficients, so they can be accumulated into tmp1-tmp2 together with the
+// largest coefficient.
+.macro convolve dst1, dst2, src1, src2, src3, src4, src5, src6, src7, src8, src9, idx1, idx2, tmp1, tmp2
+        mul             \dst1\().8h, \src2\().8h, v0.h[1]
+        mul             \dst2\().8h, \src3\().8h, v0.h[1]
+        mul             \tmp1\().8h, \src1\().8h, v0.h[0]
+        mul             \tmp2\().8h, \src2\().8h, v0.h[0]
+        mla             \dst1\().8h, \src3\().8h, v0.h[2]
+        mla             \dst2\().8h, \src4\().8h, v0.h[2]
+.if \idx1 == 3
+        mla             \dst1\().8h, \src4\().8h, v0.h[3]
+        mla             \dst2\().8h, \src5\().8h, v0.h[3]
+.else
+        mla             \dst1\().8h, \src5\().8h, v0.h[4]
+        mla             \dst2\().8h, \src6\().8h, v0.h[4]
+.endif
+        mla             \dst1\().8h, \src6\().8h, v0.h[5]
+        mla             \dst2\().8h, \src7\().8h, v0.h[5]
+        mla             \tmp1\().8h, \src8\().8h, v0.h[7]
+        mla             \tmp2\().8h, \src9\().8h, v0.h[7]
+        mla             \dst1\().8h, \src7\().8h, v0.h[6]
+        mla             \dst2\().8h, \src8\().8h, v0.h[6]
+.if \idx2 == 3
+        mla             \tmp1\().8h, \src4\().8h, v0.h[3]
+        mla             \tmp2\().8h, \src5\().8h, v0.h[3]
+.else
+        mla             \tmp1\().8h, \src5\().8h, v0.h[4]
+        mla             \tmp2\().8h, \src6\().8h, v0.h[4]
+.endif
+        sqadd           \dst1\().8h, \dst1\().8h, \tmp1\().8h
+        sqadd           \dst2\().8h, \dst2\().8h, \tmp2\().8h
+.endm
+
+// Load pixels and extend them to 16 bit
+.macro loadl dst1, dst2, dst3, dst4
+        ld1             {v1.8b}, [x2], x3
+        ld1             {v2.8b}, [x2], x3
+        ld1             {v3.8b}, [x2], x3
+.ifnb \dst4
+        ld1             {v4.8b}, [x2], x3
+.endif
+        uxtl            \dst1\().8h, v1.8b
+        uxtl            \dst2\().8h, v2.8b
+        uxtl            \dst3\().8h, v3.8b
+.ifnb \dst4
+        uxtl            \dst4\().8h, v4.8b
+.endif
+.endm
+
+// Instantiate a vertical filter function for filtering 8 pixels at a time.
+// The height is passed in x4, the width in x5 and the filter coefficients
+// in x6. idx2 is the index of the largest filter coefficient (3 or 4)
+// and idx1 is the other one of them.
+.macro do_8tap_8v type, idx1, idx2
+function \type\()_8tap_8v_\idx1\idx2
+        sub             x2,  x2,  x3, lsl #1
+        sub             x2,  x2,  x3
+        ld1             {v0.8h},  [x6]
+1:
+.ifc \type,avg
+        mov             x7,  x0
+.endif
+        mov             x6,  x4
+
+        loadl           v17, v18, v19
+
+        loadl           v20, v21, v22, v23
+2:
+        loadl           v24, v25, v26, v27
+        convolve        v1,  v2,  v17, v18, v19, v20, v21, v22, v23, v24, v25, \idx1, \idx2, v5,  v6
+        convolve        v3,  v4,  v19, v20, v21, v22, v23, v24, v25, v26, v27, \idx1, \idx2, v5,  v6
+        do_store        v1,  v2,  v3,  v4,  v5,  v6,  v7,  v28, \type
+
+        subs            x6,  x6,  #4
+        b.eq            8f
+
+        loadl           v16, v17, v18, v19
+        convolve        v1,  v2,  v21, v22, v23, v24, v25, v26, v27, v16, v17, \idx1, \idx2, v5,  v6
+        convolve        v3,  v4,  v23, v24, v25, v26, v27, v16, v17, v18, v19, \idx1, \idx2, v5,  v6
+        do_store        v1,  v2,  v3,  v4,  v5,  v6,  v7,  v28, \type
+
+        subs            x6,  x6,  #4
+        b.eq            8f
+
+        loadl           v20, v21, v22, v23
+        convolve        v1,  v2,  v25, v26, v27, v16, v17, v18, v19, v20, v21, \idx1, \idx2, v5,  v6
+        convolve        v3,  v4,  v27, v16, v17, v18, v19, v20, v21, v22, v23, \idx1, \idx2, v5,  v6
+        do_store        v1,  v2,  v3,  v4,  v5,  v6,  v7,  v28, \type
+
+        subs            x6,  x6,  #4
+        b.ne            2b
+
+8:
+        subs            x5,  x5,  #8
+        b.eq            9f
+        // x0 -= h * dst_stride
+        msub            x0,  x1,  x4, x0
+        // x2 -= h * src_stride
+        msub            x2,  x3,  x4, x2
+        // x2 -= 8 * src_stride
+        sub             x2,  x2,  x3, lsl #3
+        // x2 += 1 * src_stride
+        add             x2,  x2,  x3
+        add             x2,  x2,  #8
+        add             x0,  x0,  #8
+        b               1b
+9:
+        ret
+endfunc
+.endm
+
+do_8tap_8v put, 3, 4
+do_8tap_8v put, 4, 3
+do_8tap_8v avg, 3, 4
+do_8tap_8v avg, 4, 3
+
+
+// Instantiate a vertical filter function for filtering a 4 pixels wide
+// slice. The first half of the registers contain one row, while the second
+// half of a register contains the second-next row (also stored in the first
+// half of the register two steps ahead). The convolution does two outputs
+// at a time; the output of v17-v24 into one, and v18-v25 into another one.
+// The first half of first output is the first output row, the first half
+// of the other output is the second output row. The second halves of the
+// registers are rows 3 and 4.
+// This only is designed to work for 4 or 8 output lines.
+.macro do_8tap_4v type, idx1, idx2
+function \type\()_8tap_4v_\idx1\idx2
+        sub             x2,  x2,  x3, lsl #1
+        sub             x2,  x2,  x3
+        ld1             {v0.8h},  [x6]
+.ifc \type,avg
+        mov             x7,  x0
+.endif
+
+        ld1             {v1.s}[0],  [x2], x3
+        ld1             {v2.s}[0],  [x2], x3
+        ld1             {v3.s}[0],  [x2], x3
+        ld1             {v4.s}[0],  [x2], x3
+        ld1             {v5.s}[0],  [x2], x3
+        ld1             {v6.s}[0],  [x2], x3
+        trn1            v1.2s,  v1.2s,  v3.2s
+        ld1             {v7.s}[0],  [x2], x3
+        trn1            v2.2s,  v2.2s,  v4.2s
+        ld1             {v26.s}[0], [x2], x3
+        uxtl            v17.8h, v1.8b
+        trn1            v3.2s,  v3.2s,  v5.2s
+        ld1             {v27.s}[0], [x2], x3
+        uxtl            v18.8h, v2.8b
+        trn1            v4.2s,  v4.2s,  v6.2s
+        ld1             {v28.s}[0], [x2], x3
+        uxtl            v19.8h, v3.8b
+        trn1            v5.2s,  v5.2s,  v7.2s
+        ld1             {v29.s}[0], [x2], x3
+        uxtl            v20.8h, v4.8b
+        trn1            v6.2s,  v6.2s,  v26.2s
+        uxtl            v21.8h, v5.8b
+        trn1            v7.2s,  v7.2s,  v27.2s
+        uxtl            v22.8h, v6.8b
+        trn1            v26.2s, v26.2s, v28.2s
+        uxtl            v23.8h, v7.8b
+        trn1            v27.2s, v27.2s, v29.2s
+        uxtl            v24.8h, v26.8b
+        uxtl            v25.8h, v27.8b
+
+        convolve        v1,  v2,  v17, v18, v19, v20, v21, v22, v23, v24, v25, \idx1, \idx2, v3,  v4
+        do_store4       v1,  v2,  v5,  v6,  \type
+
+        subs            x4,  x4,  #4
+        b.eq            9f
+
+        ld1             {v1.s}[0],  [x2], x3
+        ld1             {v2.s}[0],  [x2], x3
+        trn1            v28.2s, v28.2s, v1.2s
+        trn1            v29.2s, v29.2s, v2.2s
+        ld1             {v1.s}[1],  [x2], x3
+        uxtl            v26.8h, v28.8b
+        ld1             {v2.s}[1],  [x2], x3
+        uxtl            v27.8h, v29.8b
+        uxtl            v28.8h, v1.8b
+        uxtl            v29.8h, v2.8b
+
+        convolve        v1,  v2,  v21, v22, v23, v24, v25, v26, v27, v28, v29, \idx1, \idx2, v3,  v4
+        do_store4       v1,  v2,  v5,  v6,  \type
+
+9:
+        ret
+endfunc
+.endm
+
+do_8tap_4v put, 3, 4
+do_8tap_4v put, 4, 3
+do_8tap_4v avg, 3, 4
+do_8tap_4v avg, 4, 3
+
+
+.macro do_8tap_v_func type, filter, offset, size
+function ff_vp9_\type\()_\filter\()\size\()_v_neon, export=1
+        uxtw            x4,  w4
+        movrel          x5,  X(ff_vp9_subpel_filters), 256*\offset
+        cmp             w6,  #8
+        add             x6,  x5,  w6, uxtw #4
+        mov             x5,  #\size
+.if \size >= 8
+        b.ge            \type\()_8tap_8v_34
+        b               \type\()_8tap_8v_43
+.else
+        b.ge            \type\()_8tap_4v_34
+        b               \type\()_8tap_4v_43
+.endif
+endfunc
+.endm
+
+.macro do_8tap_v_filters size
+do_8tap_v_func put, regular, 1, \size
+do_8tap_v_func avg, regular, 1, \size
+do_8tap_v_func put, sharp,   2, \size
+do_8tap_v_func avg, sharp,   2, \size
+do_8tap_v_func put, smooth,  0, \size
+do_8tap_v_func avg, smooth,  0, \size
+.endm
+
+do_8tap_v_filters 64
+do_8tap_v_filters 32
+do_8tap_v_filters 16
+do_8tap_v_filters 8
+do_8tap_v_filters 4