1 /*
2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 * Copyright (c) 2023, Alliance for Open Media. All rights reserved
4 *
5 * This source code is subject to the terms of the BSD 2 Clause License and
6 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
7 * was not distributed with this source code in the LICENSE file, you can
8 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
9 * Media Patent License 1.0 was not distributed with this source code in the
10 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
11 */
12
13 #include <arm_neon.h>
14 #include <assert.h>
15 #include <string.h>
16
17 #include "config/aom_config.h"
18 #include "config/aom_dsp_rtcd.h"
19
20 #include "aom/aom_integer.h"
21 #include "aom_dsp/aom_dsp_common.h"
22 #include "aom_dsp/aom_filter.h"
23 #include "aom_dsp/arm/mem_neon.h"
24 #include "aom_dsp/arm/transpose_neon.h"
25 #include "aom_ports/mem.h"
26
27 DECLARE_ALIGNED(16, static const uint8_t, dot_prod_permute_tbl[48]) = {
28 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6,
29 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10,
30 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14
31 };
32
33 DECLARE_ALIGNED(16, static const uint8_t, dot_prod_tran_concat_tbl[32]) = {
34 0, 8, 16, 24, 1, 9, 17, 25, 2, 10, 18, 26, 3, 11, 19, 27,
35 4, 12, 20, 28, 5, 13, 21, 29, 6, 14, 22, 30, 7, 15, 23, 31
36 };
37
38 DECLARE_ALIGNED(16, static const uint8_t, dot_prod_merge_block_tbl[48]) = {
39 /* Shift left and insert new last column in transposed 4x4 block. */
40 1, 2, 3, 16, 5, 6, 7, 20, 9, 10, 11, 24, 13, 14, 15, 28,
41 /* Shift left and insert two new columns in transposed 4x4 block. */
42 2, 3, 16, 17, 6, 7, 20, 21, 10, 11, 24, 25, 14, 15, 28, 29,
43 /* Shift left and insert three new columns in transposed 4x4 block. */
44 3, 16, 17, 18, 7, 20, 21, 22, 11, 24, 25, 26, 15, 28, 29, 30
45 };
46
convolve8_4_sdot(uint8x16_t samples,const int8x8_t filter,const int32x4_t correction,const uint8x16_t range_limit,const uint8x16x2_t permute_tbl)47 static INLINE int16x4_t convolve8_4_sdot(uint8x16_t samples,
48 const int8x8_t filter,
49 const int32x4_t correction,
50 const uint8x16_t range_limit,
51 const uint8x16x2_t permute_tbl) {
52 int8x16_t clamped_samples, permuted_samples[2];
53 int32x4_t sum;
54
55 /* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
56 clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
57
58 /* Permute samples ready for dot product. */
59 /* { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 } */
60 permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
61 /* { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 } */
62 permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
63
64 /* Accumulate dot product into 'correction' to account for range clamp. */
65 sum = vdotq_lane_s32(correction, permuted_samples[0], filter, 0);
66 sum = vdotq_lane_s32(sum, permuted_samples[1], filter, 1);
67
68 /* Further narrowing and packing is performed by the caller. */
69 return vqmovn_s32(sum);
70 }
71
convolve8_8_sdot(uint8x16_t samples,const int8x8_t filter,const int32x4_t correction,const uint8x16_t range_limit,const uint8x16x3_t permute_tbl)72 static INLINE uint8x8_t convolve8_8_sdot(uint8x16_t samples,
73 const int8x8_t filter,
74 const int32x4_t correction,
75 const uint8x16_t range_limit,
76 const uint8x16x3_t permute_tbl) {
77 int8x16_t clamped_samples, permuted_samples[3];
78 int32x4_t sum0, sum1;
79 int16x8_t sum;
80
81 /* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
82 clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
83
84 /* Permute samples ready for dot product. */
85 /* { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 } */
86 permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
87 /* { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 } */
88 permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
89 /* { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 } */
90 permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
91
92 /* Accumulate dot product into 'correction' to account for range clamp. */
93 /* First 4 output values. */
94 sum0 = vdotq_lane_s32(correction, permuted_samples[0], filter, 0);
95 sum0 = vdotq_lane_s32(sum0, permuted_samples[1], filter, 1);
96 /* Second 4 output values. */
97 sum1 = vdotq_lane_s32(correction, permuted_samples[1], filter, 0);
98 sum1 = vdotq_lane_s32(sum1, permuted_samples[2], filter, 1);
99
100 /* Narrow and re-pack. */
101 sum = vcombine_s16(vqmovn_s32(sum0), vqmovn_s32(sum1));
102 return vqrshrun_n_s16(sum, FILTER_BITS);
103 }
104
aom_convolve8_horiz_neon_dotprod(const uint8_t * src,ptrdiff_t src_stride,uint8_t * dst,ptrdiff_t dst_stride,const int16_t * filter_x,int x_step_q4,const int16_t * filter_y,int y_step_q4,int w,int h)105 void aom_convolve8_horiz_neon_dotprod(const uint8_t *src, ptrdiff_t src_stride,
106 uint8_t *dst, ptrdiff_t dst_stride,
107 const int16_t *filter_x, int x_step_q4,
108 const int16_t *filter_y, int y_step_q4,
109 int w, int h) {
110 const int8x8_t filter = vmovn_s16(vld1q_s16(filter_x));
111 const int16x8_t correct_tmp = vmulq_n_s16(vld1q_s16(filter_x), 128);
112 const int32x4_t correction = vdupq_n_s32((int32_t)vaddvq_s16(correct_tmp));
113 const uint8x16_t range_limit = vdupq_n_u8(128);
114 uint8x16_t s0, s1, s2, s3;
115
116 assert((intptr_t)dst % 4 == 0);
117 assert(dst_stride % 4 == 0);
118
119 (void)x_step_q4;
120 (void)filter_y;
121 (void)y_step_q4;
122
123 src -= ((SUBPEL_TAPS / 2) - 1);
124
125 if (w == 4) {
126 const uint8x16x2_t perm_tbl = vld1q_u8_x2(dot_prod_permute_tbl);
127 do {
128 int16x4_t t0, t1, t2, t3;
129 uint8x8_t d01, d23;
130
131 load_u8_16x4(src, src_stride, &s0, &s1, &s2, &s3);
132
133 t0 = convolve8_4_sdot(s0, filter, correction, range_limit, perm_tbl);
134 t1 = convolve8_4_sdot(s1, filter, correction, range_limit, perm_tbl);
135 t2 = convolve8_4_sdot(s2, filter, correction, range_limit, perm_tbl);
136 t3 = convolve8_4_sdot(s3, filter, correction, range_limit, perm_tbl);
137 d01 = vqrshrun_n_s16(vcombine_s16(t0, t1), FILTER_BITS);
138 d23 = vqrshrun_n_s16(vcombine_s16(t2, t3), FILTER_BITS);
139
140 store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
141 store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
142
143 src += 4 * src_stride;
144 dst += 4 * dst_stride;
145 h -= 4;
146 } while (h > 0);
147 } else {
148 const uint8x16x3_t perm_tbl = vld1q_u8_x3(dot_prod_permute_tbl);
149 const uint8_t *s;
150 uint8_t *d;
151 int width;
152 uint8x8_t d0, d1, d2, d3;
153
154 do {
155 width = w;
156 s = src;
157 d = dst;
158 do {
159 load_u8_16x4(s, src_stride, &s0, &s1, &s2, &s3);
160
161 d0 = convolve8_8_sdot(s0, filter, correction, range_limit, perm_tbl);
162 d1 = convolve8_8_sdot(s1, filter, correction, range_limit, perm_tbl);
163 d2 = convolve8_8_sdot(s2, filter, correction, range_limit, perm_tbl);
164 d3 = convolve8_8_sdot(s3, filter, correction, range_limit, perm_tbl);
165
166 store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
167
168 s += 8;
169 d += 8;
170 width -= 8;
171 } while (width != 0);
172 src += 4 * src_stride;
173 dst += 4 * dst_stride;
174 h -= 4;
175 } while (h > 0);
176 }
177 }
178
transpose_concat_4x4(int8x8_t a0,int8x8_t a1,int8x8_t a2,int8x8_t a3,int8x16_t * b,const uint8x16_t permute_tbl)179 static INLINE void transpose_concat_4x4(int8x8_t a0, int8x8_t a1, int8x8_t a2,
180 int8x8_t a3, int8x16_t *b,
181 const uint8x16_t permute_tbl) {
182 /* Transpose 8-bit elements and concatenate result rows as follows:
183 * a0: 00, 01, 02, 03, XX, XX, XX, XX
184 * a1: 10, 11, 12, 13, XX, XX, XX, XX
185 * a2: 20, 21, 22, 23, XX, XX, XX, XX
186 * a3: 30, 31, 32, 33, XX, XX, XX, XX
187 *
188 * b: 00, 10, 20, 30, 01, 11, 21, 31, 02, 12, 22, 32, 03, 13, 23, 33
189 *
190 * The 'permute_tbl' is always 'dot_prod_tran_concat_tbl' above. Passing it
191 * as an argument is preferable to loading it directly from memory as this
192 * inline helper is called many times from the same parent function.
193 */
194
195 int8x16x2_t samples = { { vcombine_s8(a0, a1), vcombine_s8(a2, a3) } };
196 *b = vqtbl2q_s8(samples, permute_tbl);
197 }
198
transpose_concat_8x4(int8x8_t a0,int8x8_t a1,int8x8_t a2,int8x8_t a3,int8x16_t * b0,int8x16_t * b1,const uint8x16x2_t permute_tbl)199 static INLINE void transpose_concat_8x4(int8x8_t a0, int8x8_t a1, int8x8_t a2,
200 int8x8_t a3, int8x16_t *b0,
201 int8x16_t *b1,
202 const uint8x16x2_t permute_tbl) {
203 /* Transpose 8-bit elements and concatenate result rows as follows:
204 * a0: 00, 01, 02, 03, 04, 05, 06, 07
205 * a1: 10, 11, 12, 13, 14, 15, 16, 17
206 * a2: 20, 21, 22, 23, 24, 25, 26, 27
207 * a3: 30, 31, 32, 33, 34, 35, 36, 37
208 *
209 * b0: 00, 10, 20, 30, 01, 11, 21, 31, 02, 12, 22, 32, 03, 13, 23, 33
210 * b1: 04, 14, 24, 34, 05, 15, 25, 35, 06, 16, 26, 36, 07, 17, 27, 37
211 *
212 * The 'permute_tbl' is always 'dot_prod_tran_concat_tbl' above. Passing it
213 * as an argument is preferable to loading it directly from memory as this
214 * inline helper is called many times from the same parent function.
215 */
216
217 int8x16x2_t samples = { { vcombine_s8(a0, a1), vcombine_s8(a2, a3) } };
218 *b0 = vqtbl2q_s8(samples, permute_tbl.val[0]);
219 *b1 = vqtbl2q_s8(samples, permute_tbl.val[1]);
220 }
221
convolve8_4_sdot_partial(const int8x16_t samples_lo,const int8x16_t samples_hi,const int32x4_t correction,const int8x8_t filter)222 static INLINE int16x4_t convolve8_4_sdot_partial(const int8x16_t samples_lo,
223 const int8x16_t samples_hi,
224 const int32x4_t correction,
225 const int8x8_t filter) {
226 /* Sample range-clamping and permutation are performed by the caller. */
227 int32x4_t sum;
228
229 /* Accumulate dot product into 'correction' to account for range clamp. */
230 sum = vdotq_lane_s32(correction, samples_lo, filter, 0);
231 sum = vdotq_lane_s32(sum, samples_hi, filter, 1);
232
233 /* Further narrowing and packing is performed by the caller. */
234 return vqmovn_s32(sum);
235 }
236
convolve8_8_sdot_partial(const int8x16_t samples0_lo,const int8x16_t samples0_hi,const int8x16_t samples1_lo,const int8x16_t samples1_hi,const int32x4_t correction,const int8x8_t filter)237 static INLINE uint8x8_t convolve8_8_sdot_partial(const int8x16_t samples0_lo,
238 const int8x16_t samples0_hi,
239 const int8x16_t samples1_lo,
240 const int8x16_t samples1_hi,
241 const int32x4_t correction,
242 const int8x8_t filter) {
243 /* Sample range-clamping and permutation are performed by the caller. */
244 int32x4_t sum0, sum1;
245 int16x8_t sum;
246
247 /* Accumulate dot product into 'correction' to account for range clamp. */
248 /* First 4 output values. */
249 sum0 = vdotq_lane_s32(correction, samples0_lo, filter, 0);
250 sum0 = vdotq_lane_s32(sum0, samples0_hi, filter, 1);
251 /* Second 4 output values. */
252 sum1 = vdotq_lane_s32(correction, samples1_lo, filter, 0);
253 sum1 = vdotq_lane_s32(sum1, samples1_hi, filter, 1);
254
255 /* Narrow and re-pack. */
256 sum = vcombine_s16(vqmovn_s32(sum0), vqmovn_s32(sum1));
257 return vqrshrun_n_s16(sum, FILTER_BITS);
258 }
259
aom_convolve8_vert_neon_dotprod(const uint8_t * src,ptrdiff_t src_stride,uint8_t * dst,ptrdiff_t dst_stride,const int16_t * filter_x,int x_step_q4,const int16_t * filter_y,int y_step_q4,int w,int h)260 void aom_convolve8_vert_neon_dotprod(const uint8_t *src, ptrdiff_t src_stride,
261 uint8_t *dst, ptrdiff_t dst_stride,
262 const int16_t *filter_x, int x_step_q4,
263 const int16_t *filter_y, int y_step_q4,
264 int w, int h) {
265 const int8x8_t filter = vmovn_s16(vld1q_s16(filter_y));
266 const int16x8_t correct_tmp = vmulq_n_s16(vld1q_s16(filter_y), 128);
267 const int32x4_t correction = vdupq_n_s32((int32_t)vaddvq_s16(correct_tmp));
268 const uint8x8_t range_limit = vdup_n_u8(128);
269 const uint8x16x3_t merge_block_tbl = vld1q_u8_x3(dot_prod_merge_block_tbl);
270 int8x16x2_t samples_LUT;
271
272 assert((intptr_t)dst % 4 == 0);
273 assert(dst_stride % 4 == 0);
274
275 (void)filter_x;
276 (void)x_step_q4;
277 (void)y_step_q4;
278
279 src -= ((SUBPEL_TAPS / 2) - 1) * src_stride;
280
281 if (w == 4) {
282 const uint8x16_t tran_concat_tbl = vld1q_u8(dot_prod_tran_concat_tbl);
283
284 uint8x8_t t0, t1, t2, t3, t4, t5, t6;
285 load_u8_8x7(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
286 src += 7 * src_stride;
287
288 /* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
289 int8x8_t s0 = vreinterpret_s8_u8(vsub_u8(t0, range_limit));
290 int8x8_t s1 = vreinterpret_s8_u8(vsub_u8(t1, range_limit));
291 int8x8_t s2 = vreinterpret_s8_u8(vsub_u8(t2, range_limit));
292 int8x8_t s3 = vreinterpret_s8_u8(vsub_u8(t3, range_limit));
293 int8x8_t s4 = vreinterpret_s8_u8(vsub_u8(t4, range_limit));
294 int8x8_t s5 = vreinterpret_s8_u8(vsub_u8(t5, range_limit));
295 int8x8_t s6 = vreinterpret_s8_u8(vsub_u8(t6, range_limit));
296
297 /* This operation combines a conventional transpose and the sample permute
298 * (see horizontal case) required before computing the dot product.
299 */
300 int8x16_t s0123, s1234, s2345, s3456;
301 transpose_concat_4x4(s0, s1, s2, s3, &s0123, tran_concat_tbl);
302 transpose_concat_4x4(s1, s2, s3, s4, &s1234, tran_concat_tbl);
303 transpose_concat_4x4(s2, s3, s4, s5, &s2345, tran_concat_tbl);
304 transpose_concat_4x4(s3, s4, s5, s6, &s3456, tran_concat_tbl);
305
306 do {
307 uint8x8_t t7, t8, t9, t10;
308 load_u8_8x4(src, src_stride, &t7, &t8, &t9, &t10);
309
310 int8x8_t s7 = vreinterpret_s8_u8(vsub_u8(t7, range_limit));
311 int8x8_t s8 = vreinterpret_s8_u8(vsub_u8(t8, range_limit));
312 int8x8_t s9 = vreinterpret_s8_u8(vsub_u8(t9, range_limit));
313 int8x8_t s10 = vreinterpret_s8_u8(vsub_u8(t10, range_limit));
314
315 int8x16_t s4567, s5678, s6789, s78910;
316 transpose_concat_4x4(s7, s8, s9, s10, &s78910, tran_concat_tbl);
317
318 /* Merge new data into block from previous iteration. */
319 samples_LUT.val[0] = s3456;
320 samples_LUT.val[1] = s78910;
321 s4567 = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[0]);
322 s5678 = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[1]);
323 s6789 = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[2]);
324
325 int16x4_t d0 = convolve8_4_sdot_partial(s0123, s4567, correction, filter);
326 int16x4_t d1 = convolve8_4_sdot_partial(s1234, s5678, correction, filter);
327 int16x4_t d2 = convolve8_4_sdot_partial(s2345, s6789, correction, filter);
328 int16x4_t d3 =
329 convolve8_4_sdot_partial(s3456, s78910, correction, filter);
330 uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS);
331 uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS);
332
333 store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
334 store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
335
336 /* Prepare block for next iteration - re-using as much as possible. */
337 /* Shuffle everything up four rows. */
338 s0123 = s4567;
339 s1234 = s5678;
340 s2345 = s6789;
341 s3456 = s78910;
342
343 src += 4 * src_stride;
344 dst += 4 * dst_stride;
345 h -= 4;
346 } while (h != 0);
347 } else {
348 const uint8x16x2_t tran_concat_tbl = vld1q_u8_x2(dot_prod_tran_concat_tbl);
349
350 do {
351 int height = h;
352 const uint8_t *s = src;
353 uint8_t *d = dst;
354
355 uint8x8_t t0, t1, t2, t3, t4, t5, t6;
356 load_u8_8x7(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
357 s += 7 * src_stride;
358
359 /* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
360 int8x8_t s0 = vreinterpret_s8_u8(vsub_u8(t0, range_limit));
361 int8x8_t s1 = vreinterpret_s8_u8(vsub_u8(t1, range_limit));
362 int8x8_t s2 = vreinterpret_s8_u8(vsub_u8(t2, range_limit));
363 int8x8_t s3 = vreinterpret_s8_u8(vsub_u8(t3, range_limit));
364 int8x8_t s4 = vreinterpret_s8_u8(vsub_u8(t4, range_limit));
365 int8x8_t s5 = vreinterpret_s8_u8(vsub_u8(t5, range_limit));
366 int8x8_t s6 = vreinterpret_s8_u8(vsub_u8(t6, range_limit));
367
368 /* This operation combines a conventional transpose and the sample permute
369 * (see horizontal case) required before computing the dot product.
370 */
371 int8x16_t s0123_lo, s0123_hi, s1234_lo, s1234_hi, s2345_lo, s2345_hi,
372 s3456_lo, s3456_hi;
373 transpose_concat_8x4(s0, s1, s2, s3, &s0123_lo, &s0123_hi,
374 tran_concat_tbl);
375 transpose_concat_8x4(s1, s2, s3, s4, &s1234_lo, &s1234_hi,
376 tran_concat_tbl);
377 transpose_concat_8x4(s2, s3, s4, s5, &s2345_lo, &s2345_hi,
378 tran_concat_tbl);
379 transpose_concat_8x4(s3, s4, s5, s6, &s3456_lo, &s3456_hi,
380 tran_concat_tbl);
381
382 do {
383 uint8x8_t t7, t8, t9, t10;
384 load_u8_8x4(s, src_stride, &t7, &t8, &t9, &t10);
385
386 int8x8_t s7 = vreinterpret_s8_u8(vsub_u8(t7, range_limit));
387 int8x8_t s8 = vreinterpret_s8_u8(vsub_u8(t8, range_limit));
388 int8x8_t s9 = vreinterpret_s8_u8(vsub_u8(t9, range_limit));
389 int8x8_t s10 = vreinterpret_s8_u8(vsub_u8(t10, range_limit));
390
391 int8x16_t s4567_lo, s4567_hi, s5678_lo, s5678_hi, s6789_lo, s6789_hi,
392 s78910_lo, s78910_hi;
393 transpose_concat_8x4(s7, s8, s9, s10, &s78910_lo, &s78910_hi,
394 tran_concat_tbl);
395
396 /* Merge new data into block from previous iteration. */
397 samples_LUT.val[0] = s3456_lo;
398 samples_LUT.val[1] = s78910_lo;
399 s4567_lo = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[0]);
400 s5678_lo = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[1]);
401 s6789_lo = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[2]);
402
403 samples_LUT.val[0] = s3456_hi;
404 samples_LUT.val[1] = s78910_hi;
405 s4567_hi = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[0]);
406 s5678_hi = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[1]);
407 s6789_hi = vqtbl2q_s8(samples_LUT, merge_block_tbl.val[2]);
408
409 uint8x8_t d0 = convolve8_8_sdot_partial(s0123_lo, s4567_lo, s0123_hi,
410 s4567_hi, correction, filter);
411 uint8x8_t d1 = convolve8_8_sdot_partial(s1234_lo, s5678_lo, s1234_hi,
412 s5678_hi, correction, filter);
413 uint8x8_t d2 = convolve8_8_sdot_partial(s2345_lo, s6789_lo, s2345_hi,
414 s6789_hi, correction, filter);
415 uint8x8_t d3 = convolve8_8_sdot_partial(s3456_lo, s78910_lo, s3456_hi,
416 s78910_hi, correction, filter);
417
418 store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
419
420 /* Prepare block for next iteration - re-using as much as possible. */
421 /* Shuffle everything up four rows. */
422 s0123_lo = s4567_lo;
423 s0123_hi = s4567_hi;
424 s1234_lo = s5678_lo;
425 s1234_hi = s5678_hi;
426 s2345_lo = s6789_lo;
427 s2345_hi = s6789_hi;
428 s3456_lo = s78910_lo;
429 s3456_hi = s78910_hi;
430
431 s += 4 * src_stride;
432 d += 4 * dst_stride;
433 height -= 4;
434 } while (height != 0);
435 src += 8;
436 dst += 8;
437 w -= 8;
438 } while (w != 0);
439 }
440 }
441