Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 2039 insertions, 0 deletions

diff --git a/third_party/dav1d/src/arm/32/filmgrain.S b/third_party/dav1d/src/arm/32/filmgrain.S
new file mode 100644
index 0000000000..d1f83efb98
--- /dev/null
+++ b/third_party/dav1d/src/arm/32/filmgrain.S
@@ -0,0 +1,2039 @@
+/*
+ * Copyright © 2021, VideoLAN and dav1d authors
+ * Copyright © 2021, Martin Storsjo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "src/arm/asm.S"
+#include "util.S"
+#include "src/arm/asm-offsets.h"
+
+#define GRAIN_WIDTH 82
+#define GRAIN_HEIGHT 73
+
+#define SUB_GRAIN_WIDTH 44
+#define SUB_GRAIN_HEIGHT 38
+
+.macro increment_seed steps, shift=1
+        lsr             r11, r2,  #3
+        lsr             r12, r2,  #12
+        lsr             lr,  r2,  #1
+        eor             r11, r2,  r11                     // (r >> 0) ^ (r >> 3)
+        eor             r12, r12, lr                      // (r >> 12) ^ (r >> 1)
+        eor             r11, r11, r12                     // (r >> 0) ^ (r >> 3) ^ (r >> 12) ^ (r >> 1)
+.if \shift
+        lsr             r2,  r2,  #\steps
+.endif
+        and             r11, r11, #((1 << \steps) - 1)    // bit
+.if \shift
+        orr             r2,  r2,  r11, lsl #(16 - \steps) // *state
+.else
+        orr             r2,  r2,  r11, lsl #16            // *state
+.endif
+.endm
+
+.macro read_rand dest, bits, age
+        ubfx            \dest,  r2,   #16 - \bits - \age, #\bits
+.endm
+
+.macro read_shift_rand dest, bits
+        ubfx            \dest,  r2,   #17 - \bits, #\bits
+        lsr             r2,  r2,  #1
+.endm
+
+// special calling convention:
+// r2 holds seed
+// r3 holds dav1d_gaussian_sequence
+// clobbers r11-r12
+// returns in d0-d1
+function get_gaussian_neon
+        push            {r5-r6,lr}
+        increment_seed  4
+        read_rand       r5,  11,  3
+        read_rand       r6,  11,  2
+        add             r5,  r3,  r5,  lsl #1
+        add             r6,  r3,  r6,  lsl #1
+        vld1.16         {d0[0]}, [r5]
+        read_rand       r5,  11,  1
+        vld1.16         {d0[1]}, [r6]
+        add             r5,  r3,  r5,  lsl #1
+        read_rand       r6, 11,  0
+        increment_seed  4
+        add             r6,  r3,  r6,  lsl #1
+        vld1.16         {d0[2]}, [r5]
+        read_rand       r5,  11,  3
+        vld1.16         {d0[3]}, [r6]
+        add             r5,  r3,  r5,  lsl #1
+        read_rand       r6,  11,  2
+        vld1.16         {d1[0]}, [r5]
+        add             r6,  r3,  r6,  lsl #1
+        read_rand       r5,  11,  1
+        vld1.16         {d1[1]}, [r6]
+        read_rand       r6,  11,  0
+        add             r5,  r3,  r5,  lsl #1
+        add             r6,  r3,  r6,  lsl #1
+        vld1.16         {d1[2]}, [r5]
+        vld1.16         {d1[3]}, [r6]
+        pop             {r5-r6,pc}
+endfunc
+
+.macro get_grain_row r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r0, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r1, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r2, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r3, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r4, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r5, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r6, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r7, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r8, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r9, q0
+        increment_seed  2
+        read_rand       r11, 11,  1
+        read_rand       r12, 11,  0
+        add             r11, r3,  r11, lsl #1
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d0[0]}, [r11]
+        vld1.16         {d0[1]}, [r12]
+        vrshl.s16       d0,  d0,  d30
+        vmovn.i16       \r10, q0
+.endm
+
+.macro store_grain_row r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10
+        vst1.16         {\r0, \r1, \r2, \r3}, [r0]!
+        vst1.16         {\r4, \r5, \r6, \r7}, [r0]!
+        vst1.16         {\r8, \r9},           [r0]!
+        vst1.16         {\r10[0]},            [r0]!
+.endm
+
+.macro get_grain_row_44 r0, r1, r2, r3, r4, r5
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r0, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r1, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r2, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r3, q0
+        bl              get_gaussian_neon
+        vrshl.s16       q0,  q0,  q15
+        vmovn.i16       \r4, q0
+        increment_seed  4
+        read_rand       r11, 11,  3
+        read_rand       r12, 11,  2
+        add             r11, r3,  r11, lsl #1
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d0[]}, [r11]
+        read_rand       r11, 11,  1
+        vld1.16         {d0[1]}, [r12]
+        add             r11, r3,  r11, lsl #1
+        read_rand       r12, 11,  0
+        vld1.16         {d0[2]}, [r11]
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d0[3]}, [r12]
+        vrshl.s16       d0,  d0,  d30
+        vmovn.i16       \r5, q0
+.endm
+
+.macro store_grain_row_44 r0, r1, r2, r3, r4, r5
+        vst1.16         {\r0, \r1, \r2, \r3}, [r0]!
+        vst1.16         {\r4, \r5},           [r0]
+        add             r0,  r0,  #GRAIN_WIDTH-32
+.endm
+
+function get_grain_2_neon
+        push            {r11,lr}
+        increment_seed  2
+        read_rand       r11, 11,  1
+        read_rand       r12, 11,  0
+        add             r11, r3,  r11, lsl #1
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d0[0]}, [r11]
+        vld1.16         {d0[1]}, [r12]
+        vrshl.s16       d0,  d0,  d30
+        vmovn.i16       d0,  q0
+        pop             {r11,pc}
+endfunc
+
+.macro get_grain_2 dst
+        bl              get_grain_2_neon
+.ifnc \dst, d0
+        vmov            \dst, d0
+.endif
+.endm
+
+// r1 holds the number of entries to produce
+// r6, r8 and r10 hold the previous output entries
+// q0 holds the vector of produced entries
+// q1 holds the input vector of sums from above
+.macro output_lag n
+function output_lag\n\()_neon
+        push            {r0, lr}
+.if \n == 1
+        mov             lr,  #-128
+.else
+        mov             r0,  #1
+        mov             lr,  #1
+        sub             r7,  r7,  #1
+        sub             r9,  r9,  #1
+        lsl             r0,  r0,  r7
+        lsl             lr,  lr,  r9
+        add             r7,  r7,  #1
+        add             r9,  r9,  #1
+.endif
+1:
+        read_shift_rand r12, 11
+        vmov.32         r11, d2[0]
+        lsl             r12, r12, #1
+        vext.8          q0,  q0,  q0,  #1
+        ldrsh           r12, [r3, r12]
+.if \n == 1
+        mla             r11, r6,  r4,  r11        // sum (above) + *coeff * prev output
+        add             r6,  r11, r8              // 1 << (ar_coeff_shift - 1)
+        add             r12, r12, r10
+        asr             r6,  r6,  r7              // >> ar_coeff_shift
+        asr             r12, r12, r9              // >> (4 + grain_scale_shift)
+        add             r6,  r6,  r12
+        cmp             r6,  r5
+.elseif \n == 2
+        mla             r11, r8,  r4,  r11        // sum (above) + *coeff * prev output 1
+        mla             r11, r6,  r10, r11        // += *coeff * prev output 2
+        mov             r8,  r6
+        add             r6,  r11, r0              // 1 << (ar_coeff_shift - 1)
+        add             r12, r12, lr              // 1 << (4 + grain_scale_shift - 1)
+        asr             r6,  r6,  r7              // >> ar_coeff_shift
+        asr             r12, r12, r9              // >> (4 + grain_scale_shift)
+        add             r6,  r6,  r12
+        push            {lr}
+        cmp             r6,  r5
+        mov             lr,  #-128
+.else
+        push            {r1-r3}
+        sbfx            r1,  r4,  #0,  #8
+        sbfx            r2,  r4,  #8,  #8
+        sbfx            r3,  r4,  #16, #8
+        mla             r11, r10, r1,  r11        // sum (above) + *coeff * prev output 1
+        mla             r11, r8,  r2,  r11        // sum (above) + *coeff * prev output 2
+        mla             r11, r6,  r3,  r11        // += *coeff * prev output 3
+        pop             {r1-r3}
+        mov             r10, r8
+        mov             r8,  r6
+
+        add             r6,  r11, r0              // 1 << (ar_coeff_shift - 1)
+        add             r12, r12, lr              // 1 << (4 + grain_scale_shift - 1)
+        asr             r6,  r6,  r7              // >> ar_coeff_shift
+        asr             r12, r12, r9              // >> (4 + grain_scale_shift)
+        add             r6,  r6,  r12
+        push            {lr}
+        cmp             r6,  r5
+        mov             lr,  #-128
+.endif
+        it              gt
+        movgt           r6,  r5
+        cmp             r6,  lr
+        it              lt
+        movlt           r6,  lr
+.if \n >= 2
+        pop             {lr}
+.endif
+        subs            r1,  r1,  #1
+        vext.8          q1,  q1,  q1,  #4
+        vmov.8          d1[7], r6
+        bgt             1b
+        pop             {r0, pc}
+endfunc
+.endm
+
+output_lag 1
+output_lag 2
+output_lag 3
+
+
+function sum_lag1_above_neon
+        vmull.s8        q2,  d6,  d28
+        vmull.s8        q3,  d7,  d28
+        vmull.s8        q4,  d0,  d27
+        vmull.s8        q5,  d1,  d27
+
+        vaddl.s16       q0,  d4,  d8
+        vaddl.s16       q2,  d5,  d9
+        vaddl.s16       q4,  d6,  d10
+        vaddl.s16       q5,  d7,  d11
+
+        vmull.s8        q3,  d3,  d29
+        vmull.s8        q1,  d2,  d29
+
+        vaddw.s16       q4,  q4,  d6
+        vaddw.s16       q5,  q5,  d7
+        vaddw.s16       q3,  q2,  d3
+        vaddw.s16       q2,  q0,  d2
+        bx              lr
+endfunc
+
+.macro sum_lag_n_body lag, type, uv_layout, edge, elems, store, uv_coeff
+.ifc \lag\()_\edge, lag3_left
+        bl              sum_lag3_left_above_neon
+.else
+        bl              sum_\lag\()_above_neon
+.endif
+.ifc \type, uv_420
+        vpush           {q6-q7}
+        add             r12, r11, #GRAIN_WIDTH
+        vld1.16         {q0, q1}, [r11]!
+        vld1.16         {q6, q7}, [r12]!
+        vpaddl.s8       q0,  q0
+        vpaddl.s8       q1,  q1
+        vpaddl.s8       q6,  q6
+        vpaddl.s8       q7,  q7
+        vadd.i16        q0,  q0,  q6
+        vadd.i16        q1,  q1,  q7
+        vpop            {q6-q7}
+        vrshrn.s16      d0,  q0,  #2
+        vrshrn.s16      d1,  q1,  #2
+.endif
+.ifc \type, uv_422
+        vld1.8          {q0, q1}, [r11]!
+        vpaddl.s8       q0,  q0
+        vpaddl.s8       q1,  q1
+        vrshrn.s16      d0,  q0,  #1
+        vrshrn.s16      d1,  q1,  #1
+.endif
+.ifc \type, uv_444
+        vld1.8          {q0}, [r11]!
+.endif
+.if \uv_layout
+.ifnb \uv_coeff
+        vdup.8          d13, \uv_coeff
+.endif
+        vmull.s8        q1,  d0,  d13
+        vmull.s8        q0,  d1,  d13
+        vaddw.s16       q2,  q2,  d2
+        vaddw.s16       q3,  q3,  d3
+        vaddw.s16       q4,  q4,  d0
+        vaddw.s16       q5,  q5,  d1
+.endif
+.if \uv_layout && \elems == 16
+        b               sum_\lag\()_y_\edge\()_start
+.elseif \uv_layout == 444 && \elems == 15
+        b               sum_\lag\()_y_\edge\()_start
+.elseif \uv_layout == 422 && \elems == 9
+        b               sum_\lag\()_uv_420_\edge\()_start
+.else
+sum_\lag\()_\type\()_\edge\()_start:
+        push            {r11}
+.ifc \edge, left
+        increment_seed  4
+        read_rand       r11, 11,  3
+        read_rand       r12, 11,  2
+        add             r11, r3,  r11, lsl #1
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d1[1]}, [r11]
+        read_rand       r11, 11,  1
+        vld1.16         {d1[2]}, [r12]
+        add             r11, r3,  r11, lsl #1
+        vld1.16         {d1[3]}, [r11]
+        lsl             r2,  r2,  #1             // shift back the state as if we'd done increment_seed with shift=0
+        vrshl.s16       d1,  d1,  d30
+        vmovn.i16       d1,  q0
+        vext.8          q2,  q2,  q2,  #12
+.ifc \lag, lag3
+        vmov.s8         r10, d1[5]
+.endif
+.ifnc \lag, lag1
+        vmov.s8         r8,  d1[6]
+.endif
+        vmov.s8         r6,  d1[7]
+
+        vmov            q1,  q2
+        mov             r1,  #1
+        bl              output_\lag\()_neon
+.else
+        increment_seed  4, shift=0
+        vmov            q1,  q2
+        mov             r1,  #4
+        bl              output_\lag\()_neon
+.endif
+
+        increment_seed  4, shift=0
+        vmov            q1,  q3
+        mov             r1,  #4
+        bl              output_\lag\()_neon
+
+        increment_seed  4, shift=0
+        vmov            q1,  q4
+.if \elems == 9
+        mov             r1,  #1
+        bl              output_\lag\()_neon
+        lsr             r2,  r2,  #3
+
+        read_rand       r11, 11,  2
+        read_rand       r12, 11,  1
+        add             r11, r3,  r11, lsl #1
+        add             r12, r3,  r12, lsl #1
+        vld1.16         {d2[0]}, [r11]
+        read_rand       r11, 11,  0
+        vld1.16         {d2[1]}, [r12]
+        add             r11, r3,  r11, lsl #1
+        vld1.16         {d2[2]}, [r11]
+        vrshl.s16       d2,  d2,  d30
+        vmovn.i16       d2,  q1
+        vext.8          q0,  q0,  q1,  #7
+.else
+        mov             r1,  #4
+        bl              output_\lag\()_neon
+
+        increment_seed  4, shift=0
+        vmov            q1,  q5
+
+.ifc \edge, right
+        mov             r1,  #3
+        bl              output_\lag\()_neon
+        read_shift_rand r11, 11
+        add             r11, r3,  r11, lsl #1
+        vld1.16         {d2[0]}, [r11]
+        vrshl.s16       d2,  d2,  d30
+        vext.8          q0,  q0,  q1,  #1
+.else
+        mov             r1,  #4
+        bl              output_\lag\()_neon
+.endif
+.endif
+.if \store
+        vst1.8          {q0}, [r0]!
+.endif
+        pop             {r11}
+        pop             {r1, pc}
+.endif
+.endm
+
+.macro sum_lag1_func type, uv_layout, edge, elems=16
+function sum_\type\()_lag1_\edge\()_neon
+        push            {r1, lr}
+        sum_lag_n_body  lag1, \type, \uv_layout, \edge, \elems, store=0
+endfunc
+.endm
+
+sum_lag1_func y,      0,   left
+sum_lag1_func y,      0,   mid
+sum_lag1_func y,      0,   right, 15
+sum_lag1_func uv_444, 444, left
+sum_lag1_func uv_444, 444, mid
+sum_lag1_func uv_444, 444, right, 15
+sum_lag1_func uv_422, 422, left
+sum_lag1_func uv_422, 422, mid
+sum_lag1_func uv_422, 422, right, 9
+sum_lag1_func uv_420, 420, left
+sum_lag1_func uv_420, 420, mid
+sum_lag1_func uv_420, 420, right, 9
+
+.macro sum_lag1 type, dst, left, mid, right, edge=mid
+        vmov            q3,  \mid
+        vext.8          q0,  \left, \mid,   #15
+        vext.8          q1,  \mid,  \right, #1
+        bl              sum_\type\()_lag1_\edge\()_neon
+        vmov            \dst, q0
+.endm
+
+.macro sum_y_lag1 dst, left, mid, right, edge=mid
+        sum_lag1        y, \dst, \left, \mid, \right, \edge
+.endm
+
+.macro sum_uv_444_lag1 dst, left, mid, right, edge=mid
+        sum_lag1        uv_444, \dst, \left, \mid, \right, \edge
+.endm
+
+.macro sum_uv_422_lag1 dst, left, mid, right, edge=mid
+        sum_lag1        uv_422, \dst, \left, \mid, \right, \edge
+.endm
+
+.macro sum_uv_420_lag1 dst, left, mid, right, edge=mid
+        sum_lag1        uv_420, \dst, \left, \mid, \right, \edge
+.endm
+
+
+function sum_lag2_above_neon
+        push            {lr}
+        sub             r12, r0,  #2*GRAIN_WIDTH - 16
+        sub             lr,  r0,  #1*GRAIN_WIDTH - 16
+        vld1.8          {q10}, [r12] // load top right
+        vld1.8          {q13}, [lr]
+
+        vext.8          q6,  q8,  q9,  #14 // top left, top mid
+        vdup.8          d14, d28[0]
+        vext.8          q8,  q8,  q9,  #15
+        vdup.8          d15, d28[1]
+
+        vmull.s8        q0,  d12, d14
+        vmull.s8        q1,  d13, d14
+        vmull.s8        q6,  d16, d15
+        vmull.s8        q8,  d17, d15
+
+        vaddl.s16       q2,  d0,  d12
+        vaddl.s16       q3,  d1,  d13
+        vaddl.s16       q4,  d2,  d16
+        vaddl.s16       q5,  d3,  d17
+
+        vext.8          q6,  q9,  q10, #1  // top mid, top right
+        vdup.8          d14, d28[3]
+        vext.8          q8,  q9,  q10, #2
+        vdup.8          d15, d28[4]
+
+        vmull.s8        q0,  d12, d14
+        vmull.s8        q1,  d13, d14
+        vmull.s8        q6,  d16, d15
+        vmull.s8        q8,  d17, d15
+
+        vaddl.s16       q7,  d0,  d12
+        vaddl.s16       q0,  d1,  d13
+        vaddl.s16       q6,  d2,  d16
+        vaddl.s16       q1,  d3,  d17
+
+        vadd.i32        q2,  q2,  q7
+        vadd.i32        q3,  q3,  q0
+        vadd.i32        q4,  q4,  q6
+        vadd.i32        q5,  q5,  q1
+
+        vext.8          q6,  q11, q12, #14 // top left, top mid
+        vdup.8          d14, d28[5]
+        vext.8          q8,  q11, q12, #15
+        vdup.8          d15, d28[6]
+
+        vmull.s8        q0,  d12, d14
+        vmull.s8        q1,  d13, d14
+        vmull.s8        q6,  d16, d15
+        vmull.s8        q8,  d17, d15
+
+        vaddl.s16       q7,  d0,  d12
+        vaddl.s16       q0,  d1,  d13
+        vaddl.s16       q6,  d2,  d16
+        vaddl.s16       q1,  d3,  d17
+
+        vadd.i32        q2,  q2,  q7
+        vadd.i32        q3,  q3,  q0
+        vadd.i32        q4,  q4,  q6
+        vadd.i32        q5,  q5,  q1
+
+        vext.8          q6,  q12, q13, #1  // top mid, top right
+        vdup.8          d14, d29[0]
+        vext.8          q8,  q12, q13, #2
+        vdup.8          d15, d29[1]
+
+        vmull.s8        q0,  d12, d14
+        vmull.s8        q1,  d13, d14
+        vmull.s8        q6,  d16, d15
+        vmull.s8        q8,  d17, d15
+
+        vaddl.s16       q7,  d0,  d12
+        vaddl.s16       q0,  d1,  d13
+        vaddl.s16       q6,  d2,  d16
+        vaddl.s16       q1,  d3,  d17
+
+        vadd.i32        q2,  q2,  q7
+        vadd.i32        q3,  q3,  q0
+        vadd.i32        q4,  q4,  q6
+        vadd.i32        q5,  q5,  q1
+
+        vdup.8          d14, d28[2]
+        vdup.8          d15, d28[7]
+
+        vmull.s8        q0,  d18, d14
+        vmull.s8        q1,  d19, d14
+        vmull.s8        q6,  d24, d15
+        vmull.s8        q8,  d25, d15
+
+        vaddl.s16       q7,  d0,  d12
+        vaddl.s16       q0,  d1,  d13
+        vaddl.s16       q6,  d2,  d16
+        vaddl.s16       q1,  d3,  d17
+
+        vmov            q8,  q9
+        vmov            q9,  q10
+
+        vadd.i32        q2,  q2,  q7
+        vadd.i32        q3,  q3,  q0
+        vadd.i32        q4,  q4,  q6
+        vadd.i32        q5,  q5,  q1
+
+        vmov            q11, q12
+        vmov            q12, q13
+
+        pop             {pc}
+endfunc
+
+.macro sum_lag2_func type, uv_layout, edge, elems=16
+function sum_\type\()_lag2_\edge\()_neon
+        push            {r1, lr}
+.ifc \edge, left
+        sub             r12, r0,  #2*GRAIN_WIDTH
+        sub             lr,  r0,  #1*GRAIN_WIDTH
+        vld1.8          {q9},  [r12] // load the previous block right above
+        vld1.8          {q12}, [lr]
+.endif
+        sum_lag_n_body  lag2, \type, \uv_layout, \edge, \elems, store=1, uv_coeff=d29[4]
+endfunc
+.endm
+
+sum_lag2_func y,      0,   left
+sum_lag2_func y,      0,   mid
+sum_lag2_func y,      0,   right, 15
+sum_lag2_func uv_444, 444, left
+sum_lag2_func uv_444, 444, mid
+sum_lag2_func uv_444, 444, right, 15
+sum_lag2_func uv_422, 422, left
+sum_lag2_func uv_422, 422, mid
+sum_lag2_func uv_422, 422, right, 9
+sum_lag2_func uv_420, 420, left
+sum_lag2_func uv_420, 420, mid
+sum_lag2_func uv_420, 420, right, 9
+
+
+function sum_lag3_left_above_neon
+        // A separate codepath for the left edge, to avoid reading outside
+        // of the edge of the buffer.
+        sub             r12, r0,  #3*GRAIN_WIDTH
+        vld1.8          {q11, q12}, [r12]
+        vext.8          q12, q11, q12, #13
+        vext.8          q11, q11, q11, #13
+        b               sum_lag3_above_start
+endfunc
+
+function sum_lag3_above_neon
+        sub             r12, r0,  #3*GRAIN_WIDTH + 3
+        vld1.8          {q11, q12}, [r12]
+
+sum_lag3_above_start:
+        vdup.8          d20, d26[0]
+        vext.8          q9,  q11, q12, #1
+        vdup.8          d21, d26[1]
+
+        vmull.s8        q0,  d22, d20
+        vmull.s8        q1,  d23, d20
+        vmull.s8        q6,  d18, d21
+        vmull.s8        q7,  d19, d21
+
+        vext.8          q8,  q11, q12, #2
+        vdup.8          d20, d26[2]
+        vext.8          q9,  q11, q12, #3
+        vdup.8          d21, d26[3]
+
+        vaddl.s16       q2,  d0,  d12
+        vaddl.s16       q3,  d1,  d13
+        vaddl.s16       q4,  d2,  d14
+        vaddl.s16       q5,  d3,  d15
+
+        vmull.s8        q0,  d16, d20
+        vmull.s8        q1,  d17, d20
+        vmull.s8        q6,  d18, d21
+        vmull.s8        q7,  d19, d21
+
+        vaddl.s16       q8,  d0,  d12
+        vaddl.s16       q9,  d1,  d13
+        vaddl.s16       q0,  d2,  d14
+        vaddl.s16       q1,  d3,  d15
+
+        vext.8          q6,  q11, q12, #4
+        vdup.8          d20, d26[4]
+        vext.8          q7,  q11, q12, #5
+        vdup.8          d21, d26[5]
+
+        vadd.i32        q2,  q2,  q8
+        vadd.i32        q3,  q3,  q9
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d12, d20
+        vmull.s8        q1,  d13, d20
+        vmull.s8        q8,  d14, d21
+        vmull.s8        q9,  d15, d21
+
+        sub             r12, r0,  #2*GRAIN_WIDTH + 3
+
+        vaddl.s16       q6,  d0,  d16
+        vaddl.s16       q7,  d1,  d17
+        vaddl.s16       q0,  d2,  d18
+        vaddl.s16       q1,  d3,  d19
+
+        vext.8          q8,  q11, q12, #6
+        vld1.8          {q11, q12}, [r12]
+        vdup.8          d20, d26[6]
+        vdup.8          d21, d26[7]
+
+        vadd.i32        q2,  q2,  q6
+        vadd.i32        q3,  q3,  q7
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d16, d20
+        vmull.s8        q1,  d17, d20
+        vmull.s8        q6,  d22, d21
+        vmull.s8        q7,  d23, d21
+
+        vaddl.s16       q8,  d0,  d12
+        vaddl.s16       q9,  d1,  d13
+        vaddl.s16       q0,  d2,  d14
+        vaddl.s16       q1,  d3,  d15
+
+        vext.8          q6,  q11, q12, #1
+        vdup.8          d20, d27[0]
+        vext.8          q7,  q11, q12, #2
+        vdup.8          d21, d27[1]
+
+        vadd.i32        q2,  q2,  q8
+        vadd.i32        q3,  q3,  q9
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d12, d20
+        vmull.s8        q1,  d13, d20
+        vmull.s8        q8,  d14, d21
+        vmull.s8        q9,  d15, d21
+
+        vaddl.s16       q6,  d0,  d16
+        vaddl.s16       q7,  d1,  d17
+        vaddl.s16       q0,  d2,  d18
+        vaddl.s16       q1,  d3,  d19
+
+        vext.8          q8,  q11, q12, #3
+        vdup.8          d20, d27[2]
+        vext.8          q9,  q11, q12, #4
+        vdup.8          d21, d27[3]
+
+        vadd.i32        q2,  q2,  q6
+        vadd.i32        q3,  q3,  q7
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d16, d20
+        vmull.s8        q1,  d17, d20
+        vmull.s8        q6,  d18, d21
+        vmull.s8        q7,  d19, d21
+
+        sub             r12, r0,  #1*GRAIN_WIDTH + 3
+
+        vaddl.s16       q8,  d0,  d12
+        vaddl.s16       q9,  d1,  d13
+        vaddl.s16       q0,  d2,  d14
+        vaddl.s16       q1,  d3,  d15
+
+        vext.8          q6,  q11, q12, #5
+        vdup.8          d20, d27[4]
+        vext.8          q7,  q11, q12, #6
+        vdup.8          d21, d27[5]
+
+        vld1.8          {q11, q12}, [r12]
+
+        vadd.i32        q2,  q2,  q8
+        vadd.i32        q3,  q3,  q9
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d12, d20
+        vmull.s8        q1,  d13, d20
+        vmull.s8        q8,  d14, d21
+        vmull.s8        q9,  d15, d21
+
+        vaddl.s16       q6,  d0,  d16
+        vaddl.s16       q7,  d1,  d17
+        vaddl.s16       q0,  d2,  d18
+        vaddl.s16       q1,  d3,  d19
+
+        vdup.8          d20, d27[6]
+        vext.8          q9,  q11, q12, #1
+        vdup.8          d21, d27[7]
+
+        vadd.i32        q2,  q2,  q6
+        vadd.i32        q3,  q3,  q7
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d22, d20
+        vmull.s8        q1,  d23, d20
+        vmull.s8        q6,  d18, d21
+        vmull.s8        q7,  d19, d21
+
+        vaddl.s16       q8,  d0,  d12
+        vaddl.s16       q9,  d1,  d13
+        vaddl.s16       q0,  d2,  d14
+        vaddl.s16       q1,  d3,  d15
+
+        vext.8          q6,  q11, q12, #2
+        vdup.8          d20, d28[0]
+        vext.8          q7,  q11, q12, #3
+        vdup.8          d21, d28[1]
+
+        vadd.i32        q2,  q2,  q8
+        vadd.i32        q3,  q3,  q9
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d12, d20
+        vmull.s8        q1,  d13, d20
+        vmull.s8        q8,  d14, d21
+        vmull.s8        q9,  d15, d21
+
+        vaddl.s16       q6,  d0,  d16
+        vaddl.s16       q7,  d1,  d17
+        vaddl.s16       q0,  d2,  d18
+        vaddl.s16       q1,  d3,  d19
+
+        vext.8          q8,  q11, q12, #4
+        vdup.8          d20, d28[2]
+        vext.8          q9,  q11, q12, #5
+        vdup.8          d21, d28[3]
+
+        vadd.i32        q2,  q2,  q6
+        vadd.i32        q3,  q3,  q7
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d16, d20
+        vmull.s8        q1,  d17, d20
+        vmull.s8        q6,  d18, d21
+        vmull.s8        q7,  d19, d21
+
+        vaddl.s16       q8,  d0,  d12
+        vaddl.s16       q9,  d1,  d13
+        vaddl.s16       q0,  d2,  d14
+        vaddl.s16       q1,  d3,  d15
+
+        vext.8          q6,  q11, q12, #6
+        vdup.8          d20, d28[4]
+
+        vadd.i32        q2,  q2,  q8
+        vadd.i32        q3,  q3,  q9
+        vadd.i32        q4,  q4,  q0
+        vadd.i32        q5,  q5,  q1
+
+        vmull.s8        q0,  d12, d20
+        vmull.s8        q1,  d13, d20
+
+        vaddw.s16       q2,  q2,  d0
+        vaddw.s16       q3,  q3,  d1
+        vaddw.s16       q4,  q4,  d2
+        vaddw.s16       q5,  q5,  d3
+
+        bx              lr
+endfunc
+
+.macro sum_lag3_func type, uv_layout, edge, elems=16
+function sum_\type\()_lag3_\edge\()_neon
+        push            {r1, lr}
+        sum_lag_n_body  lag3, \type, \uv_layout, \edge, \elems, store=1, uv_coeff=d29[0]
+endfunc
+.endm
+
+sum_lag3_func y,      0,   left
+sum_lag3_func y,      0,   mid
+sum_lag3_func y,      0,   right, 15
+sum_lag3_func uv_444, 444, left
+sum_lag3_func uv_444, 444, mid
+sum_lag3_func uv_444, 444, right, 15
+sum_lag3_func uv_422, 422, left
+sum_lag3_func uv_422, 422, mid
+sum_lag3_func uv_422, 422, right, 9
+sum_lag3_func uv_420, 420, left
+sum_lag3_func uv_420, 420, mid
+sum_lag3_func uv_420, 420, right, 9
+
+function generate_grain_rows_neon
+        push            {r11,lr}
+1:
+        get_grain_row   d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26
+        subs            r1,  r1,  #1
+        store_grain_row d16, d17, d18, d19, d20, d21, d22, d23, d24, d25, d26
+        bgt             1b
+        pop             {r11,pc}
+endfunc
+
+function generate_grain_rows_44_neon
+        push            {r11,lr}
+1:
+        get_grain_row_44 d16, d17, d18, d19, d20, d21
+        subs            r1,  r1,  #1
+        store_grain_row_44 d16, d17, d18, d19, d20, d21
+        bgt             1b
+        pop             {r11,pc}
+endfunc
+
+function gen_grain_uv_444_lag0_neon
+        vld1.8          {q3}, [r11]!
+        push            {r11,lr}
+        bl              get_gaussian_neon
+        vrshl.s16       q8,  q0,  q15
+        bl              get_gaussian_neon
+        vrshl.s16       q9,  q0,  q15
+        vqmovn.s16      d0,  q8
+        vqmovn.s16      d1,  q9
+
+        vand            q3,  q3,  q1
+        vmull.s8        q2,  d6,  d22
+        vmull.s8        q3,  d7,  d22
+        vrshl.s16       q2,  q2,  q12
+        vrshl.s16       q3,  q3,  q12
+        vaddw.s8        q2,  q2,  d0
+        vaddw.s8        q3,  q3,  d1
+        vqmovn.s16      d4,  q2
+        vqmovn.s16      d5,  q3
+        vst1.8          {q2}, [r0]!
+        pop             {r11,pc}
+endfunc
+
+function get_grain_row_44_neon
+        push            {r11,lr}
+        get_grain_row_44 d16, d17, d18, d19, d20, d21
+        pop             {r11,pc}
+endfunc
+
+function add_uv_420_coeff_lag0_neon
+        vld1.16         {q2, q3}, [r11]!
+        vld1.16         {q4, q5}, [r12]!
+        vpaddl.s8       q2,  q2
+        vpaddl.s8       q3,  q3
+        vpaddl.s8       q4,  q4
+        vpaddl.s8       q5,  q5
+        vadd.i16        q2,  q2,  q4
+        vadd.i16        q3,  q3,  q5
+        vrshrn.s16      d4,  q2,  #2
+        vrshrn.s16      d5,  q3,  #2
+        b               add_coeff_lag0_start
+endfunc
+
+function add_uv_422_coeff_lag0_neon
+        vld1.16         {q2, q3}, [r11]!
+        vpaddl.s8       q2,  q2
+        vpaddl.s8       q3,  q3
+        vrshrn.s16      d4,  q2,  #1
+        vrshrn.s16      d5,  q3,  #1
+
+add_coeff_lag0_start:
+        vand            q3,  q2,  q1
+        vmull.s8        q2,  d6,  d22
+        vmull.s8        q3,  d7,  d22
+        vrshl.s16       q2,  q2,  q12
+        vrshl.s16       q3,  q3,  q12
+        vaddw.s8        q2,  q2,  d0
+        vaddw.s8        q3,  q3,  d1
+        vqmovn.s16      d4,  q2
+        vqmovn.s16      d5,  q3
+        bx              lr
+endfunc
+
+.macro gen_grain_82 type
+function generate_grain_\type\()_8bpc_neon, export=1
+        push            {r4-r11,lr}
+
+.ifc \type, uv_444
+        mov             r12, r3
+        mov             lr,  #28
+        add             r11, r1,  #3*GRAIN_WIDTH
+        mov             r1,  r2
+        mul             r12, r12, lr
+.endif
+        movrel          r3,  X(gaussian_sequence)
+        ldr             r2,  [r1, #FGD_SEED]
+        ldr             r9,  [r1, #FGD_GRAIN_SCALE_SHIFT]
+.ifc \type, y
+        add             r4,  r1,  #FGD_AR_COEFFS_Y
+.else
+        add             r4,  r1,  #FGD_AR_COEFFS_UV
+.endif
+        adr             r5,  L(gen_grain_\type\()_tbl)
+        ldr             r6,  [r1, #FGD_AR_COEFF_LAG]
+        add             r9,  r9,  #4
+        ldr             r6,  [r5, r6, lsl #2]
+        vdup.16         q15, r9    // 4 + data->grain_scale_shift
+        add             r5,  r5,  r6
+        vneg.s16        q15, q15
+
+.ifc \type, uv_444
+        cmp             r12, #0
+        movw            r10, #0x49d8
+        movw            lr,  #0xb524
+        // Intentionally using a separate register instead of moveq with an
+        // immediate constant, to avoid armv8 deprecated it instruction forms.
+        it              eq
+        moveq           r10, lr
+        add             r4,  r4,  r12       // Add offset to ar_coeffs_uv[1]
+        eor             r2,  r2,  r10
+.endif
+
+        ldr             r7,  [r1, #FGD_AR_COEFF_SHIFT]
+        mov             r8,  #1
+        mov             r10, #1
+        lsl             r8,  r8,  r7        // 1 << ar_coeff_shift
+        lsl             r10, r10, r9        // 1 << (4 + data->grain_scale_shift)
+        lsr             r8,  r8,  #1        // 1 << (ar_coeff_shift - 1)
+        lsr             r10, r10, #1        // 1 << (4 + data->grain_scale_shift - 1)
+
+        bx              r5
+
+        .align 2
+L(gen_grain_\type\()_tbl):
+        .word L(generate_grain_\type\()_lag0) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag1) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag2) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag3) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+
+L(generate_grain_\type\()_lag0):
+.ifc \type, y
+        mov             r1,  #GRAIN_HEIGHT
+        bl              generate_grain_rows_neon
+.else
+
+        mov             r1,  #3
+        bl              generate_grain_rows_neon
+        mov             r1,  #GRAIN_HEIGHT-3
+
+        vdup.16         q12, r7
+        vld1.8          {d22[]}, [r4]       // ar_coeffs_uv[0]
+        vmov.i8         q0,  #0
+        vmov.i8         q1,  #255
+        vext.8          q13, q0,  q1,  #13
+        vext.8          q14, q1,  q0,  #1
+        vneg.s16        q12, q12
+
+1:
+        vmov            q1,  q13
+        bl              gen_grain_uv_444_lag0_neon // 16
+        vmov.i8         q1,  #255
+        bl              gen_grain_uv_444_lag0_neon // 32
+        bl              gen_grain_uv_444_lag0_neon // 48
+        bl              gen_grain_uv_444_lag0_neon // 64
+        vmov            q1,  q14
+        bl              gen_grain_uv_444_lag0_neon // 80
+        get_grain_2     d16
+        subs            r1,  r1,  #1
+        add             r11, r11, #2
+        vst1.16         {d16[0]}, [r0]!
+        bgt             1b
+.endif
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag1):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {d27[]}, [r4]!      // ar_coeffs_y[0]
+        vld1.8          {d28[]}, [r4]!      // ar_coeffs_y[1]
+        vld1.8          {d29[]}, [r4]       // ar_coeffs_y[2]
+.ifc \type, y
+        ldrsb           r4,  [r4, #1]       // ar_coeffs_y[3]
+.else
+        add             r4,  r4,  #2
+.endif
+
+        mov             r1,  #3
+.ifc \type, uv_444
+        vld1.8          {d13[]}, [r4]       // ar_coeffs_uv[4]
+        ldrsb           r4,  [r4, #-1]      // ar_coeffs_uv[3]
+.endif
+        bl              generate_grain_rows_neon
+
+        mov             r1,  #GRAIN_HEIGHT - 3
+1:
+        sum_\type\()_lag1 q7,  q8,  q8,  q9,  left
+        sum_\type\()_lag1 q8,  q8,  q9,  q10
+        sum_\type\()_lag1 q9,  q9,  q10, q11
+        sum_\type\()_lag1 q10, q10, q11, q12
+        sum_\type\()_lag1 q12, q11, q12, q13, right
+        get_grain_2     d26
+        subs            r1,  r1,  #1
+.ifc \type, uv_444
+        add             r11, r11, #2
+.endif
+        store_grain_row d14, d15, d16, d17, d18, d19, d20, d21, d24, d25, d26
+        vmov            q11, q10
+        vmov            q10, q9
+        vmov            q9,  q8
+        vmov            q8,  q7
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag2):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {d28,d29}, [r4]     // ar_coeffs_y[0-11], ar_coeffs_uv[0-12]
+
+        vmov.s8         r4,  d29[2]
+        vmov.s8         r10, d29[3]
+
+        mov             r1,  #3
+        bl              generate_grain_rows_neon
+
+        mov             r1,  #GRAIN_HEIGHT - 3
+1:
+        bl              sum_\type\()_lag2_left_neon
+        bl              sum_\type\()_lag2_mid_neon
+        bl              sum_\type\()_lag2_mid_neon
+        bl              sum_\type\()_lag2_mid_neon
+        bl              sum_\type\()_lag2_right_neon
+        get_grain_2     d16
+        subs            r1,  r1,  #1
+.ifc \type, uv_444
+        add             r11, r11, #2
+.endif
+        vst1.16         {d16[0]}, [r0]!
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag3):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {q13, q14}, [r4]    // ar_coeffs_y[0-23], ar_coeffs_uv[0-24]
+
+        vmov.u8         r4,  d28[5]
+        vmov.u8         r10, d28[6]
+        vmov.u8         r12, d28[7]
+
+        orr             r4,  r4,  r10, lsl #8
+        orr             r4,  r4,  r12, lsl #16
+
+        mov             r1,  #3
+        vpush           {d26}
+        bl              generate_grain_rows_neon
+        vpop            {d26}
+
+        mov             r1,  #GRAIN_HEIGHT - 3
+1:
+        bl              sum_\type\()_lag3_left_neon
+        bl              sum_\type\()_lag3_mid_neon
+        bl              sum_\type\()_lag3_mid_neon
+        bl              sum_\type\()_lag3_mid_neon
+        bl              sum_\type\()_lag3_right_neon
+        get_grain_2     d16
+        subs            r1,  r1,  #1
+.ifc \type, uv_444
+        add             r11, r11, #2
+.endif
+        vst1.16         {d16[0]}, [r0]!
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+endfunc
+.endm
+
+gen_grain_82 y
+gen_grain_82 uv_444
+
+.macro set_height dst, type
+.ifc \type, uv_420
+        mov             \dst,  #SUB_GRAIN_HEIGHT-3
+.else
+        mov             \dst,  #GRAIN_HEIGHT-3
+.endif
+.endm
+
+.macro increment_y_ptr reg, type
+.ifc \type, uv_420
+        add             \reg, \reg, #2*GRAIN_WIDTH-(3*32)
+.else
+        sub             \reg, \reg, #3*32-GRAIN_WIDTH
+.endif
+.endm
+
+.macro gen_grain_44 type
+function generate_grain_\type\()_8bpc_neon, export=1
+        push            {r4-r11,lr}
+
+        mov             r12, r3
+        mov             lr,  #28
+        add             r11, r1,  #3*GRAIN_WIDTH-3
+        mov             r1,  r2
+        mul             r12, r12, lr
+
+        movrel          r3,  X(gaussian_sequence)
+        ldr             r2,  [r1, #FGD_SEED]
+        ldr             r9,  [r1, #FGD_GRAIN_SCALE_SHIFT]
+        add             r4,  r1,  #FGD_AR_COEFFS_UV
+        adr             r5,  L(gen_grain_\type\()_tbl)
+        ldr             r6,  [r1, #FGD_AR_COEFF_LAG]
+        add             r9,  r9,  #4
+        ldr             r6,  [r5, r6, lsl #2]
+        vdup.16         q15, r9    // 4 + data->grain_scale_shift
+        add             r5,  r5,  r6
+        vneg.s16        q15, q15
+
+        cmp             r12, #0
+        movw            r10, #0x49d8
+        movw            lr,  #0xb524
+        // Intentionally using a separate register instead of moveq with an
+        // immediate constant, to avoid armv8 deprecated it instruction forms.
+        it              eq
+        moveq           r10, lr
+        add             r4,  r4,  r12       // Add offset to ar_coeffs_uv[1]
+        eor             r2,  r2,  r10
+
+        ldr             r7,  [r1, #FGD_AR_COEFF_SHIFT]
+        mov             r8,  #1
+        mov             r10, #1
+        lsl             r8,  r8,  r7        // 1 << ar_coeff_shift
+        lsl             r10, r10, r9        // 1 << (4 + data->grain_scale_shift)
+        lsr             r8,  r8,  #1        // 1 << (ar_coeff_shift - 1)
+        lsr             r10, r10, #1        // 1 << (4 + data->grain_scale_shift - 1)
+        bx              r5
+
+        .align 2
+L(gen_grain_\type\()_tbl):
+        .word L(generate_grain_\type\()_lag0) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag1) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag2) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+        .word L(generate_grain_\type\()_lag3) - L(gen_grain_\type\()_tbl) + CONFIG_THUMB
+
+L(generate_grain_\type\()_lag0):
+.ifc \type, uv_420
+        vpush           {q4-q5}
+.endif
+        mov             r1,  #3
+        bl              generate_grain_rows_44_neon
+        set_height      r1,  \type
+
+        vdup.16         q12, r7
+        vld1.8          {d22[]}, [r4]       // ar_coeffs_uv[0]
+        vmov.i8         q0,  #0
+        vmov.i8         q1,  #255
+        vext.8          q13, q0,  q1,  #13
+        vext.8          q14, q1,  q0,  #7
+        vneg.s16        q12, q12
+
+1:
+        bl              get_grain_row_44_neon
+.ifc \type, uv_420
+        add             r12, r11, #GRAIN_WIDTH
+.endif
+        vmov            q1,  q13
+        vmov            q0,  q8
+        bl              add_\type\()_coeff_lag0_neon
+        vmov.i8         q1,  #255
+        vmov            q0,  q9
+        vmov            q8,  q2
+        bl              add_\type\()_coeff_lag0_neon
+        vmov.i8         q1,  q14
+        vmov            q0,  q10
+        vmov            q9,  q2
+        bl              add_\type\()_coeff_lag0_neon
+        vmov            q10, q2
+        subs            r1,  r1,  #1
+        increment_y_ptr r11, \type
+        store_grain_row_44 d16, d17, d18, d19, d20, d21
+        bgt             1b
+
+.ifc \type, uv_420
+        vpop            {q4-q5}
+.endif
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag1):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {d27[]}, [r4]!      // ar_coeffs_uv[0]
+        vld1.8          {d28[]}, [r4]!      // ar_coeffs_uv[1]
+        vld1.8          {d29[]}, [r4]       // ar_coeffs_uv[2]
+        add             r4,  r4,  #2
+
+        mov             r1,  #3
+        vld1.8          {d13[]}, [r4]       // ar_coeffs_uv[4]
+        ldrsb           r4,  [r4, #-1]      // ar_coeffs_uv[3]
+        bl              generate_grain_rows_44_neon
+
+        set_height      r1,  \type
+1:
+        sum_\type\()_lag1 q7,  q8,  q8,  q9,  left
+        sum_\type\()_lag1 q8,  q8,  q9,  q10
+        sum_\type\()_lag1 q10, q9,  q10, q11, right
+        subs            r1,  r1,  #1
+        increment_y_ptr r11, \type
+        store_grain_row_44 d14, d15, d16, d17, d20, d21
+        vmov            q9,  q8
+        vmov            q8,  q7
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag2):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {d28,d29}, [r4]     // ar_coeffs_uv[0-12]
+
+        vmov.s8         r4,  d29[2]
+        vmov.s8         r10, d29[3]
+
+        mov             r1,  #3
+        bl              generate_grain_rows_44_neon
+
+        set_height      r1,  \type
+1:
+        bl              sum_\type\()_lag2_left_neon
+        bl              sum_\type\()_lag2_mid_neon
+        bl              sum_\type\()_lag2_right_neon
+        subs            r1,  r1,  #1
+        increment_y_ptr r11, \type
+        add             r0,  r0,  #GRAIN_WIDTH-48
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+
+L(generate_grain_\type\()_lag3):
+        vpush           {q4-q7}
+        mov             r5,  #127
+        vld1.8          {q13, q14}, [r4]    // ar_coeffs_y[0-23], ar_coeffs_uv[0-24]
+
+        vmov.u8         r4,  d28[5]
+        vmov.u8         r10, d28[6]
+        vmov.u8         r12, d28[7]
+
+        orr             r4,  r4,  r10, lsl #8
+        orr             r4,  r4,  r12, lsl #16
+
+        mov             r1,  #3
+        bl              generate_grain_rows_44_neon
+
+        set_height      r1,  \type
+1:
+        bl              sum_\type\()_lag3_left_neon
+        bl              sum_\type\()_lag3_mid_neon
+        bl              sum_\type\()_lag3_right_neon
+        subs            r1,  r1,  #1
+        increment_y_ptr r11, \type
+        add             r0,  r0,  #GRAIN_WIDTH-48
+        bgt             1b
+
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+endfunc
+.endm
+
+gen_grain_44 uv_420
+gen_grain_44 uv_422
+
+.macro gather_interleaved dst1, dst2, src1, src2, off
+        vmov.u8         r11, \src1[0+\off]
+        vmov.u8         r12, \src2[0+\off]
+        add             r11, r11, r3
+        vmov.u8         lr,  \src1[2+\off]
+        add             r12, r12, r3
+        vld1.8          {\dst1[0+\off]}, [r11]
+        vmov.u8         r11, \src2[2+\off]
+        add             lr,  lr,  r3
+        vld1.8          {\dst2[0+\off]}, [r12]
+        vmov.u8         r12, \src1[4+\off]
+        add             r11, r11, r3
+        vld1.8          {\dst1[2+\off]}, [lr]
+        vmov.u8         lr,  \src2[4+\off]
+        add             r12, r12, r3
+        vld1.8          {\dst2[2+\off]}, [r11]
+        vmov.u8         r11, \src1[6+\off]
+        add             lr,  lr,  r3
+        vld1.8          {\dst1[4+\off]}, [r12]
+        vmov.u8         r12, \src2[6+\off]
+        add             r11, r11, r3
+        vld1.8          {\dst2[4+\off]}, [lr]
+        add             r12, r12, r3
+        vld1.8          {\dst1[6+\off]}, [r11]
+        vld1.8          {\dst2[6+\off]}, [r12]
+.endm
+
+.macro gather dst1, dst2, dst3, dst4, src1, src2, src3, src4
+        gather_interleaved \dst1, \dst3, \src1, \src3, 0
+        gather_interleaved \dst1, \dst3, \src1, \src3, 1
+        gather_interleaved \dst2, \dst4, \src2, \src4, 0
+        gather_interleaved \dst2, \dst4, \src2, \src4, 1
+.endm
+
+function gather32_neon
+        push            {r11-r12,lr}
+        gather          d8,  d9,  d10, d11, d0,  d1,  d2,  d3
+        pop             {r11-r12,pc}
+endfunc
+
+function gather16_neon
+        push            {r11-r12,lr}
+        gather_interleaved d8,  d9,  d0,  d1,  0
+        gather_interleaved d8,  d9,  d0,  d1,  1
+        pop             {r11-r12,pc}
+endfunc
+
+const overlap_coeffs_0, align=4
+        .byte 27, 17, 0,  0,  0,  0,  0,  0
+        .byte 17, 27, 32, 32, 32, 32, 32, 32
+endconst
+
+const overlap_coeffs_1, align=4
+        .byte 23, 0,  0,  0,  0,  0,  0,  0
+        .byte 22, 32, 32, 32, 32, 32, 32, 32
+endconst
+
+.macro calc_offset offx, offy, src, sx, sy
+        and             \offy, \src,  #0xF     // randval & 0xF
+        lsr             \offx, \src,  #4       // randval >> 4
+.if \sy == 0
+        add             \offy, \offy, \offy    // 2 * (randval & 0xF)
+.endif
+.if \sx == 0
+        add             \offx, \offx, \offx    // 2 * (randval >> 4)
+.endif
+.endm
+
+.macro add_offset dst, offx, offy, src, stride
+        mla             \dst, \stride, \offy, \src // grain_lut += grain_stride * offy
+        add             \dst, \dst, \offx          // grain_lut += offx
+.endm
+
+// void dav1d_fgy_32x32_8bpc_neon(pixel *const dst, const pixel *const src,
+//                                const ptrdiff_t stride,
+//                                const uint8_t scaling[SCALING_SIZE],
+//                                const int scaling_shift,
+//                                const entry grain_lut[][GRAIN_WIDTH],
+//                                const int offsets[][2],
+//                                const int h, const ptrdiff_t clip,
+//                                const ptrdiff_t type);
+function fgy_32x32_8bpc_neon, export=1
+        push            {r4-r11,lr}
+        vpush           {q4-q7}
+        ldrd            r4,  r5,  [sp, #100]   // scaling_shift, grain_lut
+        ldrd            r6,  r7,  [sp, #108]   // offsets, h
+        ldr             r8,       [sp, #116]   // clip
+        mov             r9,  #GRAIN_WIDTH      // grain_lut stride
+
+        neg             r4,  r4
+        vdup.16         q13, r4                // -scaling_shift
+        cmp             r8,  #0
+
+        movrel_local    r12, overlap_coeffs_0
+
+        beq             1f
+        // clip
+        vmov.i8         q14, #16
+        vmov.i8         q15, #235
+        b               2f
+1:
+        // no clip
+        vmov.i8         q14, #0
+        vmov.i8         q15, #255
+2:
+
+        vld1.8          {d24, d25}, [r12, :128] // overlap_coeffs
+
+        add             r5,  r5,  #9           // grain_lut += 9
+        add             r5,  r5,  r9,  lsl #3  // grain_lut += 8 * grain_stride
+        add             r5,  r5,  r9           // grain_lut += grain_stride
+
+        ldr             r10, [r6, #8]          // offsets[1][0]
+        calc_offset     r10, r4,  r10, 0,   0
+        add_offset      r4,  r10, r4,  r5,  r9
+        ldr             r10, [r6, #4]          // offsets[0][1]
+        calc_offset     r10, r11, r10, 0,   0
+        add_offset      r11, r10, r11, r5,  r9
+        ldr             r10, [r6, #12]         // offsets[1][1]
+        calc_offset     r10, r8,  r10, 0,   0
+        add_offset      r8,  r10, r8,  r5,  r9
+        ldr             r6,  [r6]              // offsets[0][0]
+        calc_offset     r6,  lr,  r6,  0,   0
+        add_offset      r5,  r6,  lr,  r5,  r9
+
+        add             r4,  r4,  #32          // grain_lut += BLOCK_SIZE * bx
+        add             r6,  r11, r9,  lsl #5  // grain_lut += grain_stride * BLOCK_SIZE * by
+
+        ldr             r10, [sp, #120]        // type
+        adr             r11, L(fgy_loop_tbl)
+
+        tst             r10, #1
+        ldr             r10, [r11, r10, lsl #2]
+
+        add             r8,  r8,  r9,  lsl #5  // grain_lut += grain_stride * BLOCK_SIZE * by
+        add             r8,  r8,  #32          // grain_lut += BLOCK_SIZE * bx
+
+        add             r11, r11, r10
+
+        beq             1f
+        // y overlap
+        vdup.8          d14, d24[0]
+        vdup.8          d15, d24[1]
+        mov             r10, r7                // backup actual h
+        mov             r7,  #2
+1:
+        bx              r11
+endfunc
+
+function fgy_loop_neon
+L(fgy_loop_tbl):
+        .word L(loop_00) - L(fgy_loop_tbl) + CONFIG_THUMB
+        .word L(loop_01) - L(fgy_loop_tbl) + CONFIG_THUMB
+        .word L(loop_10) - L(fgy_loop_tbl) + CONFIG_THUMB
+        .word L(loop_11) - L(fgy_loop_tbl) + CONFIG_THUMB
+
+.macro fgy ox, oy
+L(loop_\ox\oy):
+1:
+.if \ox
+        vld1.8          {d8},       [r4],       r9 // grain_lut old
+.endif
+.if \oy
+        vld1.8          {q2, q3},   [r6],       r9 // grain_lut top
+.endif
+.if \ox && \oy
+        vld1.8          {d10},      [r8],       r9 // grain_lut top old
+.endif
+        vld1.8          {q0,  q1},  [r1, :128], r2 // src
+        vld1.8          {q10, q11}, [r5],       r9 // grain_lut
+
+.if \ox
+        vmull.s8        q4,  d8,  d24
+        vmlal.s8        q4,  d20, d25
+.endif
+
+.if \oy
+.if \ox
+        vmull.s8        q5,  d10, d24
+        vmlal.s8        q5,  d4,  d25
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d4,  q5,  #5
+.endif
+
+        vmull.s8        q4,  d20, d15
+        vmull.s8        q5,  d21, d15
+        vmull.s8        q8,  d22, d15
+        vmull.s8        q9,  d23, d15
+        vmlal.s8        q4,  d4,  d14
+        vmlal.s8        q5,  d5,  d14
+        vmlal.s8        q8,  d6,  d14
+        vmlal.s8        q9,  d7,  d14
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d21, q5,  #5
+        vqrshrn.s16     d22, q8,  #5
+        vqrshrn.s16     d23, q9,  #5
+.elseif \ox
+        vqrshrn.s16     d20, q4,  #5
+.endif
+
+        bl              gather32_neon
+
+        vmovl.s8        q8,  d20       // grain
+        vmovl.s8        q9,  d21
+        vmovl.s8        q10, d22
+        vmovl.s8        q11, d23
+
+        vmovl.u8        q2,  d8        // scaling
+        vmovl.u8        q3,  d9
+        vmovl.u8        q4,  d10
+        vmovl.u8        q5,  d11
+
+        vmul.i16        q8,  q8,  q2   // scaling * grain
+        vmul.i16        q9,  q9,  q3
+        vmul.i16        q10, q10, q4
+        vmul.i16        q11, q11, q5
+
+        vrshl.s16       q8,  q8,  q13  // round2(scaling * grain, scaling_shift)
+        vrshl.s16       q9,  q9,  q13
+        vrshl.s16       q10, q10, q13
+        vrshl.s16       q11, q11, q13
+
+        vaddw.u8        q8,  q8,  d0   // *src + noise
+        vaddw.u8        q9,  q9,  d1
+        vaddw.u8        q10, q10, d2
+        vaddw.u8        q11, q11, d3
+
+        vqmovun.s16     d0,  q8
+        vqmovun.s16     d1,  q9
+        vqmovun.s16     d2,  q10
+        vqmovun.s16     d3,  q11
+
+        vmax.u8         q0,  q0,  q14
+        vmax.u8         q1,  q1,  q14
+        vmin.u8         q0,  q0,  q15
+        vmin.u8         q1,  q1,  q15
+
+        subs            r7,  r7,  #1
+.if \oy
+        vdup.8          d14, d25[0]
+        vdup.8          d15, d25[1]
+.endif
+        vst1.8          {q0, q1}, [r0, :128], r2 // dst
+        bgt             1b
+
+.if \oy
+        cmp             r10, #2
+        sub             r7,  r10, #2           // restore actual remaining h
+        bgt             L(loop_\ox\()0)
+.endif
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+.endm
+
+        fgy             0, 0
+        fgy             0, 1
+        fgy             1, 0
+        fgy             1, 1
+endfunc
+
+// void dav1d_fguv_32x32_420_8bpc_neon(pixel *const dst,
+//                                     const pixel *const src,
+//                                     const ptrdiff_t stride,
+//                                     const uint8_t scaling[SCALING_SIZE],
+//                                     const Dav1dFilmGrainData *const data,
+//                                     const entry grain_lut[][GRAIN_WIDTH],
+//                                     const pixel *const luma_row,
+//                                     const ptrdiff_t luma_stride,
+//                                     const int offsets[][2],
+//                                     const ptrdiff_t h, const ptrdiff_t uv,
+//                                     const ptrdiff_t is_id,
+//                                     const ptrdiff_t type);
+.macro fguv layout, sx, sy
+function fguv_32x32_\layout\()_8bpc_neon, export=1
+        push            {r4-r11,lr}
+        vpush           {q4-q7}
+        ldrd            r4,  r5,  [sp, #100]   // data, grain_lut
+        ldrd            r6,  r7,  [sp, #108]   // luma_row, luma_stride
+        ldrd            r8,  r9,  [sp, #116]   // offsets, h
+        ldrd            r10, r11, [sp, #124]   // uv, is_id
+
+        // !csfl
+        add             r10, r4,  r10, lsl #2  // + 4*uv
+        add             r12, r10, #FGD_UV_LUMA_MULT
+        add             lr,  r10, #FGD_UV_MULT
+        add             r10, r10, #FGD_UV_OFFSET
+        vld1.16         {d4[]},  [r12]         // uv_luma_mult
+        vld1.16         {d4[2]}, [r10]         // uv_offset
+        vld1.16         {d4[1]}, [lr]          // uv_mult
+
+        ldr             lr,  [r4, #FGD_SCALING_SHIFT]
+        ldr             r12, [r4, #FGD_CLIP_TO_RESTRICTED_RANGE]
+        neg             lr,  lr                // -scaling_shift
+
+        cmp             r12, #0
+        vdup.16         q13, lr                // -scaling_shift
+
+        beq             1f
+        // clip
+        cmp             r11, #0
+        vmov.i8         q14, #16
+        vmov.i8         q15, #240
+        beq             2f
+        // is_id
+        vmov.i8         q15, #235
+        b               2f
+1:
+        // no clip
+        vmov.i8         q14, #0
+        vmov.i8         q15, #255
+2:
+
+        mov             r10, #GRAIN_WIDTH      // grain_lut stride
+
+        add             r5,  r5,  #(3 + (2 >> \sx)*3) // grain_lut += 9 or 6
+.if \sy
+        add             r5,  r5,  r10, lsl #2  // grain_lut += 4 * grain_stride
+        add             r5,  r5,  r10, lsl #1  // grain_lut += 2 * grain_stride
+.else
+        add             r5,  r5,  r10, lsl #3  // grain_lut += 8 * grain_stride
+        add             r5,  r5,  r10          // grain_lut += grain_stride
+.endif
+
+        ldr             r12, [r8, #8]          // offsets[1][0]
+        calc_offset     r12, r4,  r12, \sx, \sy
+        add_offset      r4,  r12, r4,  r5,  r10
+
+        ldr             r12, [r8, #4]          // offsets[0][1]
+        calc_offset     r12, lr,  r12, \sx, \sy
+        add_offset      lr,  r12, lr,  r5,  r10
+
+        ldr             r12, [r8, #12]         // offsets[1][1]
+        calc_offset     r12, r11, r12, \sx, \sy
+        add_offset      r11, r12, r11, r5,  r10
+
+        ldr             r8,  [r8]              // offsets[0][0]
+        calc_offset     r8,  r12, r8,  \sx, \sy
+        add_offset      r5,  r8,  r12, r5,  r10
+
+        add             r4,  r4,  #(32 >> \sx) // grain_lut += BLOCK_SIZE * bx
+        add             r8,  lr,  r10, lsl #(5 - \sy) // grain_lut += grain_stride * BLOCK_SIZE * by
+        add             r11, r11, r10, lsl #(5 - \sy) // grain_lut += grain_stride * BLOCK_SIZE * by
+        add             r11, r11, #(32 >> \sx) // grain_lut += BLOCK_SIZE * bx
+
+        movrel_local    r12, overlap_coeffs_\sx
+        ldr             lr,  [sp, #132]        // type
+
+        vld1.8          {d24, d25}, [r12, :128] // overlap_coeffs
+
+        movrel_local    r12, L(fguv_loop_sx\sx\()_tbl)
+#if CONFIG_THUMB
+        // This uses movrel_local instead of adr above, because the target
+        // can be out of range for adr. But movrel_local leaves the thumb bit
+        // set on COFF (but probably wouldn't if building for thumb on ELF),
+        // thus try to clear the bit for robustness.
+        bic             r12, r12, #1
+#endif
+
+        tst             lr,  #1
+        ldr             lr,  [r12, lr,  lsl #2]
+
+        add             r12, r12, lr
+
+        beq             1f
+        // y overlap
+        sub             lr,  r9,  #(2 >> \sy)  // backup remaining h
+        mov             r9,  #(2 >> \sy)
+
+1:
+
+.if \sy
+        vmov.i8         d6,  #23
+        vmov.i8         d7,  #22
+.else
+        vmov.i8         d6,  #27
+        vmov.i8         d7,  #17
+.endif
+
+.if \sy
+        add             r7,  r7,  r7           // luma_stride *= 2
+.endif
+
+        bx              r12
+endfunc
+.endm
+
+fguv 420, 1, 1
+fguv 422, 1, 0
+fguv 444, 0, 0
+
+function fguv_loop_sx0_neon
+L(fguv_loop_sx0_tbl):
+        .word L(fguv_loop_sx0_csfl0_00) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl0_01) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl0_10) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl0_11) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl1_00) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl1_01) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl1_10) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx0_csfl1_11) - L(fguv_loop_sx0_tbl) + CONFIG_THUMB
+
+.macro fguv_loop_sx0 csfl, ox, oy
+L(fguv_loop_sx0_csfl\csfl\()_\ox\oy):
+.if \oy
+        mov             r12, lr
+.endif
+1:
+.if \ox
+        vld1.8          {d8},       [r4],        r10 // grain_lut old
+.endif
+.if \oy
+        vld1.8          {q8, q9},   [r8],        r10 // grain_lut top
+.endif
+.if \ox && \oy
+        vld1.8          {d10},      [r11],       r10 // grain_lut top old
+.endif
+        vld1.8          {q0,  q1},  [r6, :128],  r7  // luma
+        vld1.8          {q10, q11}, [r5],        r10 // grain_lut
+
+.if \ox
+        vmull.s8        q4,  d8,  d24
+        vmlal.s8        q4,  d20, d25
+.endif
+
+.if \oy
+.if \ox
+        vmull.s8        q5,  d10, d24
+        vmlal.s8        q5,  d16, d25
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d16, q5,  #5
+.endif
+
+        vmull.s8        q4,  d20, d7
+        vmull.s8        q5,  d21, d7
+        vmull.s8        q6,  d22, d7
+        vmull.s8        q7,  d23, d7
+        vmlal.s8        q4,  d16, d6
+        vmlal.s8        q5,  d17, d6
+        vmlal.s8        q6,  d18, d6
+        vmlal.s8        q7,  d19, d6
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d21, q5,  #5
+        vqrshrn.s16     d22, q6,  #5
+        vqrshrn.s16     d23, q7,  #5
+.elseif \ox
+        vqrshrn.s16     d20, q4,  #5
+.endif
+.if !\csfl
+        vld1.8          {q8,  q9},  [r1, :128] // src
+        vmovl.u8        q4,  d0
+        vmovl.u8        q5,  d1
+        vmovl.u8        q6,  d2
+        vmovl.u8        q7,  d3
+        vmovl.u8        q0,  d16
+        vmovl.u8        q1,  d17
+        vmovl.u8        q8,  d18
+        vmovl.u8        q9,  d19
+        vmul.i16        q4,  q4,  d4[0]
+        vmul.i16        q5,  q5,  d4[0]
+        vmul.i16        q6,  q6,  d4[0]
+        vmul.i16        q7,  q7,  d4[0]
+        vmul.i16        q0,  q0,  d4[1]
+        vmul.i16        q1,  q1,  d4[1]
+        vmul.i16        q8,  q8,  d4[1]
+        vmul.i16        q9,  q9,  d4[1]
+        vqadd.s16       q4,  q4,  q0
+        vqadd.s16       q5,  q5,  q1
+        vqadd.s16       q6,  q6,  q8
+        vqadd.s16       q7,  q7,  q9
+        vdup.16         q0,  d4[2]
+        vshr.s16        q4,  q4,  #6
+        vshr.s16        q5,  q5,  #6
+        vshr.s16        q6,  q6,  #6
+        vshr.s16        q7,  q7,  #6
+        vadd.i16        q4,  q4,  q0
+        vadd.i16        q5,  q5,  q0
+        vadd.i16        q6,  q6,  q0
+        vadd.i16        q7,  q7,  q0
+        vqmovun.s16     d0,  q4
+        vqmovun.s16     d1,  q5
+        vqmovun.s16     d2,  q6
+        vqmovun.s16     d3,  q7
+.endif
+
+        bl              gather32_neon
+
+        vld1.8          {q0,  q1},  [r1, :128], r2 // src
+
+        vmovl.s8        q8,  d20       // grain
+        vmovl.s8        q9,  d21
+        vmovl.s8        q10, d22
+        vmovl.s8        q11, d23
+
+        vmovl.u8        q6,  d8        // scaling
+        vmovl.u8        q7,  d9
+        vmovl.u8        q4,  d10
+        vmovl.u8        q5,  d11
+
+        vmul.i16        q8,  q8,  q6   // scaling * grain
+        vmul.i16        q9,  q9,  q7
+        vmul.i16        q10, q10, q4
+        vmul.i16        q11, q11, q5
+
+        vrshl.s16       q8,  q8,  q13  // round2(scaling * grain, scaling_shift)
+        vrshl.s16       q9,  q9,  q13
+        vrshl.s16       q10, q10, q13
+        vrshl.s16       q11, q11, q13
+
+        vaddw.u8        q8,  q8,  d0   // *src + noise
+        vaddw.u8        q9,  q9,  d1
+        vaddw.u8        q10, q10, d2
+        vaddw.u8        q11, q11, d3
+
+        vqmovun.s16     d0,  q8
+        vqmovun.s16     d1,  q9
+        vqmovun.s16     d2,  q10
+        vqmovun.s16     d3,  q11
+
+        vmax.u8         q0,  q0,  q14
+        vmax.u8         q1,  q1,  q14
+        vmin.u8         q0,  q0,  q15
+        vmin.u8         q1,  q1,  q15
+
+        subs            r9,  r9,  #1
+.if \oy
+        vdup.8          d6,  d25[0]
+        vdup.8          d7,  d25[1]
+.endif
+
+        vst1.8          {q0, q1}, [r0, :128], r2 // dst
+        bgt             1b
+
+.if \oy
+        cmp             r12, #0
+        mov             r9,  r12               // restore actual remaining h
+        bgt             L(fguv_loop_sx0_csfl\csfl\()_\ox\()0)
+.endif
+        b               9f
+.endm
+        fguv_loop_sx0   0, 0, 0
+        fguv_loop_sx0   0, 0, 1
+        fguv_loop_sx0   0, 1, 0
+        fguv_loop_sx0   0, 1, 1
+        fguv_loop_sx0   1, 0, 0
+        fguv_loop_sx0   1, 0, 1
+        fguv_loop_sx0   1, 1, 0
+        fguv_loop_sx0   1, 1, 1
+
+9:
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+endfunc
+
+function fguv_loop_sx1_neon
+L(fguv_loop_sx1_tbl):
+        .word L(fguv_loop_sx1_csfl0_00) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl0_01) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl0_10) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl0_11) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl1_00) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl1_01) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl1_10) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+        .word L(fguv_loop_sx1_csfl1_11) - L(fguv_loop_sx1_tbl) + CONFIG_THUMB
+
+.macro fguv_loop_sx1 csfl, ox, oy
+L(fguv_loop_sx1_csfl\csfl\()_\ox\oy):
+.if \oy
+        mov             r12, lr
+.endif
+1:
+.if \ox
+        vld1.8          {d8},       [r4],        r10 // grain_lut old
+.endif
+.if \oy
+        vld1.8          {q8},       [r8],        r10 // grain_lut top
+.endif
+.if \ox && \oy
+        vld1.8          {d10},      [r11],       r10 // grain_lut top old
+.endif
+        vld1.8          {q0,  q1},  [r6, :128],  r7  // luma
+        vld1.8          {q10},      [r5],        r10 // grain_lut
+        vld1.8          {q11},      [r1, :128],  r2  // src
+
+.if \ox
+        vmull.s8        q4,  d8,  d24
+        vmlal.s8        q4,  d20, d25
+.endif
+
+        vpaddl.u8       q0,  q0
+        vpaddl.u8       q1,  q1
+.if \oy
+.if \ox
+        vmull.s8        q5,  d10, d24
+        vmlal.s8        q5,  d16, d25
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d16, q5,  #5
+.endif
+
+        vmull.s8        q4,  d20, d7
+        vmull.s8        q5,  d21, d7
+        vmlal.s8        q4,  d16, d6
+        vmlal.s8        q5,  d17, d6
+        vqrshrn.s16     d20, q4,  #5
+        vqrshrn.s16     d21, q5,  #5
+.elseif \ox
+        vqrshrn.s16     d20, q4,  #5
+.endif
+.if \csfl
+        vrshrn.u16      d0,  q0,  #1
+        vrshrn.u16      d1,  q1,  #1
+.else
+        vrshr.u16       q4,  q0,  #1
+        vrshr.u16       q5,  q1,  #1
+        vmovl.u8        q0,  d22
+        vmovl.u8        q1,  d23
+        vmul.i16        q4,  q4,  d4[0]
+        vmul.i16        q5,  q5,  d4[0]
+        vmul.i16        q0,  q0,  d4[1]
+        vmul.i16        q1,  q1,  d4[1]
+        vqadd.s16       q4,  q4,  q0
+        vqadd.s16       q5,  q5,  q1
+        vdup.16         q0,  d4[2]
+        vshr.s16        q4,  q4,  #6
+        vshr.s16        q5,  q5,  #6
+        vadd.i16        q4,  q4,  q0
+        vadd.i16        q5,  q5,  q0
+        vqmovun.s16     d0,  q4
+        vqmovun.s16     d1,  q5
+.endif
+
+        bl              gather16_neon
+
+        vmovl.s8        q8,  d20       // grain
+        vmovl.s8        q9,  d21
+
+        vmovl.u8        q6,  d8        // scaling
+        vmovl.u8        q7,  d9
+
+        vmul.i16        q8,  q8,  q6   // scaling * grain
+        vmul.i16        q9,  q9,  q7
+
+        vrshl.s16       q8,  q8,  q13  // round2(scaling * grain, scaling_shift)
+        vrshl.s16       q9,  q9,  q13
+
+        vaddw.u8        q8,  q8,  d22  // *src + noise
+        vaddw.u8        q9,  q9,  d23
+
+        vqmovun.s16     d0,  q8
+        vqmovun.s16     d1,  q9
+
+        vmax.u8         q0,  q0,  q14
+        vmin.u8         q0,  q0,  q15
+
+        subs            r9,  r9,  #1
+.if \oy
+        vswp            d6,  d7
+.endif
+        vst1.8          {q0}, [r0, :128], r2 // dst
+        bgt             1b
+
+.if \oy
+        cmp             r12, #0
+        mov             r9,  r12               // restore actual remaining h
+        bgt             L(fguv_loop_sx1_csfl\csfl\()_\ox\()0)
+.endif
+
+        b               9f
+.endm
+        fguv_loop_sx1   0, 0, 0
+        fguv_loop_sx1   0, 0, 1
+        fguv_loop_sx1   0, 1, 0
+        fguv_loop_sx1   0, 1, 1
+        fguv_loop_sx1   1, 0, 0
+        fguv_loop_sx1   1, 0, 1
+        fguv_loop_sx1   1, 1, 0
+        fguv_loop_sx1   1, 1, 1
+
+9:
+        vpop            {q4-q7}
+        pop             {r4-r11,pc}
+endfunc