summaryrefslogtreecommitdiffstats
path: root/third_party/aom/aom_dsp/arm/intrapred_neon.c
blob: 7d5f640049dd5264bfe87c4e30aafe4b9a63efbb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include <arm_neon.h>

#include "./aom_config.h"
#include "./aom_dsp_rtcd.h"
#include "aom/aom_integer.h"

//------------------------------------------------------------------------------
// DC 4x4

// 'do_above' and 'do_left' facilitate branch removal when inlined.
static INLINE void dc_4x4(uint8_t *dst, ptrdiff_t stride, const uint8_t *above,
                          const uint8_t *left, int do_above, int do_left) {
  uint16x8_t sum_top;
  uint16x8_t sum_left;
  uint8x8_t dc0;

  if (do_above) {
    const uint8x8_t A = vld1_u8(above);  // top row
    const uint16x4_t p0 = vpaddl_u8(A);  // cascading summation of the top
    const uint16x4_t p1 = vpadd_u16(p0, p0);
    sum_top = vcombine_u16(p1, p1);
  }

  if (do_left) {
    const uint8x8_t L = vld1_u8(left);   // left border
    const uint16x4_t p0 = vpaddl_u8(L);  // cascading summation of the left
    const uint16x4_t p1 = vpadd_u16(p0, p0);
    sum_left = vcombine_u16(p1, p1);
  }

  if (do_above && do_left) {
    const uint16x8_t sum = vaddq_u16(sum_left, sum_top);
    dc0 = vrshrn_n_u16(sum, 3);
  } else if (do_above) {
    dc0 = vrshrn_n_u16(sum_top, 2);
  } else if (do_left) {
    dc0 = vrshrn_n_u16(sum_left, 2);
  } else {
    dc0 = vdup_n_u8(0x80);
  }

  {
    const uint8x8_t dc = vdup_lane_u8(dc0, 0);
    int i;
    for (i = 0; i < 4; ++i) {
      vst1_lane_u32((uint32_t *)(dst + i * stride), vreinterpret_u32_u8(dc), 0);
    }
  }
}

void aom_dc_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                               const uint8_t *above, const uint8_t *left) {
  dc_4x4(dst, stride, above, left, 1, 1);
}

void aom_dc_left_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                                    const uint8_t *above, const uint8_t *left) {
  (void)above;
  dc_4x4(dst, stride, NULL, left, 0, 1);
}

void aom_dc_top_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
  (void)left;
  dc_4x4(dst, stride, above, NULL, 1, 0);
}

void aom_dc_128_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
  (void)above;
  (void)left;
  dc_4x4(dst, stride, NULL, NULL, 0, 0);
}

//------------------------------------------------------------------------------
// DC 8x8

// 'do_above' and 'do_left' facilitate branch removal when inlined.
static INLINE void dc_8x8(uint8_t *dst, ptrdiff_t stride, const uint8_t *above,
                          const uint8_t *left, int do_above, int do_left) {
  uint16x8_t sum_top;
  uint16x8_t sum_left;
  uint8x8_t dc0;

  if (do_above) {
    const uint8x8_t A = vld1_u8(above);  // top row
    const uint16x4_t p0 = vpaddl_u8(A);  // cascading summation of the top
    const uint16x4_t p1 = vpadd_u16(p0, p0);
    const uint16x4_t p2 = vpadd_u16(p1, p1);
    sum_top = vcombine_u16(p2, p2);
  }

  if (do_left) {
    const uint8x8_t L = vld1_u8(left);   // left border
    const uint16x4_t p0 = vpaddl_u8(L);  // cascading summation of the left
    const uint16x4_t p1 = vpadd_u16(p0, p0);
    const uint16x4_t p2 = vpadd_u16(p1, p1);
    sum_left = vcombine_u16(p2, p2);
  }

  if (do_above && do_left) {
    const uint16x8_t sum = vaddq_u16(sum_left, sum_top);
    dc0 = vrshrn_n_u16(sum, 4);
  } else if (do_above) {
    dc0 = vrshrn_n_u16(sum_top, 3);
  } else if (do_left) {
    dc0 = vrshrn_n_u16(sum_left, 3);
  } else {
    dc0 = vdup_n_u8(0x80);
  }

  {
    const uint8x8_t dc = vdup_lane_u8(dc0, 0);
    int i;
    for (i = 0; i < 8; ++i) {
      vst1_u32((uint32_t *)(dst + i * stride), vreinterpret_u32_u8(dc));
    }
  }
}

void aom_dc_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                               const uint8_t *above, const uint8_t *left) {
  dc_8x8(dst, stride, above, left, 1, 1);
}

void aom_dc_left_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                                    const uint8_t *above, const uint8_t *left) {
  (void)above;
  dc_8x8(dst, stride, NULL, left, 0, 1);
}

void aom_dc_top_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
  (void)left;
  dc_8x8(dst, stride, above, NULL, 1, 0);
}

void aom_dc_128_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
  (void)above;
  (void)left;
  dc_8x8(dst, stride, NULL, NULL, 0, 0);
}

//------------------------------------------------------------------------------
// DC 16x16

// 'do_above' and 'do_left' facilitate branch removal when inlined.
static INLINE void dc_16x16(uint8_t *dst, ptrdiff_t stride,
                            const uint8_t *above, const uint8_t *left,
                            int do_above, int do_left) {
  uint16x8_t sum_top;
  uint16x8_t sum_left;
  uint8x8_t dc0;

  if (do_above) {
    const uint8x16_t A = vld1q_u8(above);  // top row
    const uint16x8_t p0 = vpaddlq_u8(A);   // cascading summation of the top
    const uint16x4_t p1 = vadd_u16(vget_low_u16(p0), vget_high_u16(p0));
    const uint16x4_t p2 = vpadd_u16(p1, p1);
    const uint16x4_t p3 = vpadd_u16(p2, p2);
    sum_top = vcombine_u16(p3, p3);
  }

  if (do_left) {
    const uint8x16_t L = vld1q_u8(left);  // left row
    const uint16x8_t p0 = vpaddlq_u8(L);  // cascading summation of the left
    const uint16x4_t p1 = vadd_u16(vget_low_u16(p0), vget_high_u16(p0));
    const uint16x4_t p2 = vpadd_u16(p1, p1);
    const uint16x4_t p3 = vpadd_u16(p2, p2);
    sum_left = vcombine_u16(p3, p3);
  }

  if (do_above && do_left) {
    const uint16x8_t sum = vaddq_u16(sum_left, sum_top);
    dc0 = vrshrn_n_u16(sum, 5);
  } else if (do_above) {
    dc0 = vrshrn_n_u16(sum_top, 4);
  } else if (do_left) {
    dc0 = vrshrn_n_u16(sum_left, 4);
  } else {
    dc0 = vdup_n_u8(0x80);
  }

  {
    const uint8x16_t dc = vdupq_lane_u8(dc0, 0);
    int i;
    for (i = 0; i < 16; ++i) {
      vst1q_u8(dst + i * stride, dc);
    }
  }
}

void aom_dc_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                 const uint8_t *above, const uint8_t *left) {
  dc_16x16(dst, stride, above, left, 1, 1);
}

void aom_dc_left_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above,
                                      const uint8_t *left) {
  (void)above;
  dc_16x16(dst, stride, NULL, left, 0, 1);
}

void aom_dc_top_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                     const uint8_t *above,
                                     const uint8_t *left) {
  (void)left;
  dc_16x16(dst, stride, above, NULL, 1, 0);
}

void aom_dc_128_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                     const uint8_t *above,
                                     const uint8_t *left) {
  (void)above;
  (void)left;
  dc_16x16(dst, stride, NULL, NULL, 0, 0);
}

//------------------------------------------------------------------------------
// DC 32x32

// 'do_above' and 'do_left' facilitate branch removal when inlined.
static INLINE void dc_32x32(uint8_t *dst, ptrdiff_t stride,
                            const uint8_t *above, const uint8_t *left,
                            int do_above, int do_left) {
  uint16x8_t sum_top;
  uint16x8_t sum_left;
  uint8x8_t dc0;

  if (do_above) {
    const uint8x16_t A0 = vld1q_u8(above);  // top row
    const uint8x16_t A1 = vld1q_u8(above + 16);
    const uint16x8_t p0 = vpaddlq_u8(A0);  // cascading summation of the top
    const uint16x8_t p1 = vpaddlq_u8(A1);
    const uint16x8_t p2 = vaddq_u16(p0, p1);
    const uint16x4_t p3 = vadd_u16(vget_low_u16(p2), vget_high_u16(p2));
    const uint16x4_t p4 = vpadd_u16(p3, p3);
    const uint16x4_t p5 = vpadd_u16(p4, p4);
    sum_top = vcombine_u16(p5, p5);
  }

  if (do_left) {
    const uint8x16_t L0 = vld1q_u8(left);  // left row
    const uint8x16_t L1 = vld1q_u8(left + 16);
    const uint16x8_t p0 = vpaddlq_u8(L0);  // cascading summation of the left
    const uint16x8_t p1 = vpaddlq_u8(L1);
    const uint16x8_t p2 = vaddq_u16(p0, p1);
    const uint16x4_t p3 = vadd_u16(vget_low_u16(p2), vget_high_u16(p2));
    const uint16x4_t p4 = vpadd_u16(p3, p3);
    const uint16x4_t p5 = vpadd_u16(p4, p4);
    sum_left = vcombine_u16(p5, p5);
  }

  if (do_above && do_left) {
    const uint16x8_t sum = vaddq_u16(sum_left, sum_top);
    dc0 = vrshrn_n_u16(sum, 6);
  } else if (do_above) {
    dc0 = vrshrn_n_u16(sum_top, 5);
  } else if (do_left) {
    dc0 = vrshrn_n_u16(sum_left, 5);
  } else {
    dc0 = vdup_n_u8(0x80);
  }

  {
    const uint8x16_t dc = vdupq_lane_u8(dc0, 0);
    int i;
    for (i = 0; i < 32; ++i) {
      vst1q_u8(dst + i * stride, dc);
      vst1q_u8(dst + i * stride + 16, dc);
    }
  }
}

void aom_dc_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                 const uint8_t *above, const uint8_t *left) {
  dc_32x32(dst, stride, above, left, 1, 1);
}

void aom_dc_left_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above,
                                      const uint8_t *left) {
  (void)above;
  dc_32x32(dst, stride, NULL, left, 0, 1);
}

void aom_dc_top_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                     const uint8_t *above,
                                     const uint8_t *left) {
  (void)left;
  dc_32x32(dst, stride, above, NULL, 1, 0);
}

void aom_dc_128_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                     const uint8_t *above,
                                     const uint8_t *left) {
  (void)above;
  (void)left;
  dc_32x32(dst, stride, NULL, NULL, 0, 0);
}

// -----------------------------------------------------------------------------

void aom_d135_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                                 const uint8_t *above, const uint8_t *left) {
  const uint8x8_t XABCD_u8 = vld1_u8(above - 1);
  const uint64x1_t XABCD = vreinterpret_u64_u8(XABCD_u8);
  const uint64x1_t ____XABC = vshl_n_u64(XABCD, 32);
  const uint32x2_t zero = vdup_n_u32(0);
  const uint32x2_t IJKL = vld1_lane_u32((const uint32_t *)left, zero, 0);
  const uint8x8_t IJKL_u8 = vreinterpret_u8_u32(IJKL);
  const uint64x1_t LKJI____ = vreinterpret_u64_u8(vrev32_u8(IJKL_u8));
  const uint64x1_t LKJIXABC = vorr_u64(LKJI____, ____XABC);
  const uint8x8_t KJIXABC_ = vreinterpret_u8_u64(vshr_n_u64(LKJIXABC, 8));
  const uint8x8_t JIXABC__ = vreinterpret_u8_u64(vshr_n_u64(LKJIXABC, 16));
  const uint8_t D = vget_lane_u8(XABCD_u8, 4);
  const uint8x8_t JIXABCD_ = vset_lane_u8(D, JIXABC__, 6);
  const uint8x8_t LKJIXABC_u8 = vreinterpret_u8_u64(LKJIXABC);
  const uint8x8_t avg1 = vhadd_u8(JIXABCD_, LKJIXABC_u8);
  const uint8x8_t avg2 = vrhadd_u8(avg1, KJIXABC_);
  const uint64x1_t avg2_u64 = vreinterpret_u64_u8(avg2);
  const uint32x2_t r3 = vreinterpret_u32_u8(avg2);
  const uint32x2_t r2 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 8));
  const uint32x2_t r1 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 16));
  const uint32x2_t r0 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 24));
  vst1_lane_u32((uint32_t *)(dst + 0 * stride), r0, 0);
  vst1_lane_u32((uint32_t *)(dst + 1 * stride), r1, 0);
  vst1_lane_u32((uint32_t *)(dst + 2 * stride), r2, 0);
  vst1_lane_u32((uint32_t *)(dst + 3 * stride), r3, 0);
}

#if !HAVE_NEON_ASM

void aom_v_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                              const uint8_t *above, const uint8_t *left) {
  int i;
  uint32x2_t d0u32 = vdup_n_u32(0);
  (void)left;

  d0u32 = vld1_lane_u32((const uint32_t *)above, d0u32, 0);
  for (i = 0; i < 4; i++, dst += stride)
    vst1_lane_u32((uint32_t *)dst, d0u32, 0);
}

void aom_v_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                              const uint8_t *above, const uint8_t *left) {
  int i;
  uint8x8_t d0u8 = vdup_n_u8(0);
  (void)left;

  d0u8 = vld1_u8(above);
  for (i = 0; i < 8; i++, dst += stride) vst1_u8(dst, d0u8);
}

void aom_v_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                const uint8_t *above, const uint8_t *left) {
  int i;
  uint8x16_t q0u8 = vdupq_n_u8(0);
  (void)left;

  q0u8 = vld1q_u8(above);
  for (i = 0; i < 16; i++, dst += stride) vst1q_u8(dst, q0u8);
}

void aom_v_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                const uint8_t *above, const uint8_t *left) {
  int i;
  uint8x16_t q0u8 = vdupq_n_u8(0);
  uint8x16_t q1u8 = vdupq_n_u8(0);
  (void)left;

  q0u8 = vld1q_u8(above);
  q1u8 = vld1q_u8(above + 16);
  for (i = 0; i < 32; i++, dst += stride) {
    vst1q_u8(dst, q0u8);
    vst1q_u8(dst + 16, q1u8);
  }
}

void aom_h_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
                              const uint8_t *above, const uint8_t *left) {
  uint8x8_t d0u8 = vdup_n_u8(0);
  uint32x2_t d1u32 = vdup_n_u32(0);
  (void)above;

  d1u32 = vld1_lane_u32((const uint32_t *)left, d1u32, 0);

  d0u8 = vdup_lane_u8(vreinterpret_u8_u32(d1u32), 0);
  vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d0u8), 0);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u32(d1u32), 1);
  vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d0u8), 0);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u32(d1u32), 2);
  vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d0u8), 0);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u32(d1u32), 3);
  vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d0u8), 0);
}

void aom_h_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
                              const uint8_t *above, const uint8_t *left) {
  uint8x8_t d0u8 = vdup_n_u8(0);
  uint64x1_t d1u64 = vdup_n_u64(0);
  (void)above;

  d1u64 = vld1_u64((const uint64_t *)left);

  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 0);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 1);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 2);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 3);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 4);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 5);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 6);
  vst1_u8(dst, d0u8);
  dst += stride;
  d0u8 = vdup_lane_u8(vreinterpret_u8_u64(d1u64), 7);
  vst1_u8(dst, d0u8);
}

void aom_h_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
                                const uint8_t *above, const uint8_t *left) {
  int j;
  uint8x8_t d2u8 = vdup_n_u8(0);
  uint8x16_t q0u8 = vdupq_n_u8(0);
  uint8x16_t q1u8 = vdupq_n_u8(0);
  (void)above;

  q1u8 = vld1q_u8(left);
  d2u8 = vget_low_u8(q1u8);
  for (j = 0; j < 2; j++, d2u8 = vget_high_u8(q1u8)) {
    q0u8 = vdupq_lane_u8(d2u8, 0);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 1);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 2);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 3);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 4);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 5);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 6);
    vst1q_u8(dst, q0u8);
    dst += stride;
    q0u8 = vdupq_lane_u8(d2u8, 7);
    vst1q_u8(dst, q0u8);
    dst += stride;
  }
}

void aom_h_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
                                const uint8_t *above, const uint8_t *left) {
  int j, k;
  uint8x8_t d2u8 = vdup_n_u8(0);
  uint8x16_t q0u8 = vdupq_n_u8(0);
  uint8x16_t q1u8 = vdupq_n_u8(0);
  (void)above;

  for (k = 0; k < 2; k++, left += 16) {
    q1u8 = vld1q_u8(left);
    d2u8 = vget_low_u8(q1u8);
    for (j = 0; j < 2; j++, d2u8 = vget_high_u8(q1u8)) {
      q0u8 = vdupq_lane_u8(d2u8, 0);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 1);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 2);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 3);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 4);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 5);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 6);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
      q0u8 = vdupq_lane_u8(d2u8, 7);
      vst1q_u8(dst, q0u8);
      vst1q_u8(dst + 16, q0u8);
      dst += stride;
    }
  }
}
#endif  // !HAVE_NEON_ASM