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/aom_convolve8_neon.h"
24 #include "aom_dsp/arm/aom_filter.h"
25 #include "aom_dsp/arm/mem_neon.h"
26 #include "aom_dsp/arm/transpose_neon.h"
27 #include "aom_ports/mem.h"
28
convolve8_horiz_8tap_neon(const uint8_t * src,ptrdiff_t src_stride,uint8_t * dst,ptrdiff_t dst_stride,const int16_t * filter_x,int w,int h)29 static inline void convolve8_horiz_8tap_neon(const uint8_t *src,
30 ptrdiff_t src_stride, uint8_t *dst,
31 ptrdiff_t dst_stride,
32 const int16_t *filter_x, int w,
33 int h) {
34 // All filter values are even so halve them to reduce intermediate precision
35 // requirements.
36 const int16x8_t filter = vshrq_n_s16(vld1q_s16(filter_x), 1);
37
38 if (h == 4) {
39 uint8x8_t t0, t1, t2, t3;
40 load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
41 transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
42
43 int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
44 int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
45 int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
46 int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
47 int16x4_t s4 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
48 int16x4_t s5 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
49 int16x4_t s6 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
50
51 src += 7;
52
53 do {
54 load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
55 transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
56
57 int16x4_t s7 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
58 int16x4_t s8 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
59 int16x4_t s9 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
60 int16x4_t s10 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
61
62 int16x4_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
63 int16x4_t d1 = convolve8_4(s1, s2, s3, s4, s5, s6, s7, s8, filter);
64 int16x4_t d2 = convolve8_4(s2, s3, s4, s5, s6, s7, s8, s9, filter);
65 int16x4_t d3 = convolve8_4(s3, s4, s5, s6, s7, s8, s9, s10, filter);
66 // We halved the filter values so -1 from right shift.
67 uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS - 1);
68 uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS - 1);
69
70 transpose_elems_inplace_u8_4x4(&d01, &d23);
71
72 store_u8x4_strided_x2(dst + 0 * dst_stride, 2 * dst_stride, d01);
73 store_u8x4_strided_x2(dst + 1 * dst_stride, 2 * dst_stride, d23);
74
75 s0 = s4;
76 s1 = s5;
77 s2 = s6;
78 s3 = s7;
79 s4 = s8;
80 s5 = s9;
81 s6 = s10;
82
83 src += 4;
84 dst += 4;
85 w -= 4;
86 } while (w != 0);
87 } else {
88 if (w == 4) {
89 do {
90 uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
91 load_u8_8x8(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
92 transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
93
94 int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
95 int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
96 int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
97 int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
98 int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
99 int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
100 int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
101
102 load_u8_8x8(src + 7, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6,
103 &t7);
104 transpose_elems_u8_4x8(t0, t1, t2, t3, t4, t5, t6, t7, &t0, &t1, &t2,
105 &t3);
106
107 int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
108 int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
109 int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
110 int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
111
112 uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
113 uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
114 uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
115 uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
116
117 transpose_elems_inplace_u8_8x4(&d0, &d1, &d2, &d3);
118
119 store_u8x4_strided_x2(dst + 0 * dst_stride, 4 * dst_stride, d0);
120 store_u8x4_strided_x2(dst + 1 * dst_stride, 4 * dst_stride, d1);
121 store_u8x4_strided_x2(dst + 2 * dst_stride, 4 * dst_stride, d2);
122 store_u8x4_strided_x2(dst + 3 * dst_stride, 4 * dst_stride, d3);
123
124 src += 8 * src_stride;
125 dst += 8 * dst_stride;
126 h -= 8;
127 } while (h > 0);
128 } else {
129 do {
130 int width = w;
131 const uint8_t *s = src;
132 uint8_t *d = dst;
133
134 uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
135 load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
136 transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
137
138 int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
139 int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
140 int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
141 int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
142 int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
143 int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
144 int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
145
146 s += 7;
147
148 do {
149 load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
150 transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6,
151 &t7);
152
153 int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
154 int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
155 int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
156 int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
157 int16x8_t s11 = vreinterpretq_s16_u16(vmovl_u8(t4));
158 int16x8_t s12 = vreinterpretq_s16_u16(vmovl_u8(t5));
159 int16x8_t s13 = vreinterpretq_s16_u16(vmovl_u8(t6));
160 int16x8_t s14 = vreinterpretq_s16_u16(vmovl_u8(t7));
161
162 uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
163 uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
164 uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
165 uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
166 uint8x8_t d4 = convolve8_8(s4, s5, s6, s7, s8, s9, s10, s11, filter);
167 uint8x8_t d5 = convolve8_8(s5, s6, s7, s8, s9, s10, s11, s12, filter);
168 uint8x8_t d6 =
169 convolve8_8(s6, s7, s8, s9, s10, s11, s12, s13, filter);
170 uint8x8_t d7 =
171 convolve8_8(s7, s8, s9, s10, s11, s12, s13, s14, filter);
172
173 transpose_elems_inplace_u8_8x8(&d0, &d1, &d2, &d3, &d4, &d5, &d6,
174 &d7);
175
176 store_u8_8x8(d, dst_stride, d0, d1, d2, d3, d4, d5, d6, d7);
177
178 s0 = s8;
179 s1 = s9;
180 s2 = s10;
181 s3 = s11;
182 s4 = s12;
183 s5 = s13;
184 s6 = s14;
185
186 s += 8;
187 d += 8;
188 width -= 8;
189 } while (width != 0);
190 src += 8 * src_stride;
191 dst += 8 * dst_stride;
192 h -= 8;
193 } while (h > 0);
194 }
195 }
196 }
197
convolve8_horiz_4tap_neon(const uint8_t * src,ptrdiff_t src_stride,uint8_t * dst,ptrdiff_t dst_stride,const int16_t * filter_x,int w,int h)198 static inline void convolve8_horiz_4tap_neon(const uint8_t *src,
199 ptrdiff_t src_stride, uint8_t *dst,
200 ptrdiff_t dst_stride,
201 const int16_t *filter_x, int w,
202 int h) {
203 // All filter values are even, halve to reduce intermediate precision
204 // requirements.
205 const int16x4_t filter = vshr_n_s16(vld1_s16(filter_x + 2), 1);
206
207 if (w == 4) {
208 do {
209 uint8x8_t t01[4];
210
211 t01[0] = load_unaligned_u8(src + 0, (int)src_stride);
212 t01[1] = load_unaligned_u8(src + 1, (int)src_stride);
213 t01[2] = load_unaligned_u8(src + 2, (int)src_stride);
214 t01[3] = load_unaligned_u8(src + 3, (int)src_stride);
215
216 int16x8_t s01[4];
217 s01[0] = vreinterpretq_s16_u16(vmovl_u8(t01[0]));
218 s01[1] = vreinterpretq_s16_u16(vmovl_u8(t01[1]));
219 s01[2] = vreinterpretq_s16_u16(vmovl_u8(t01[2]));
220 s01[3] = vreinterpretq_s16_u16(vmovl_u8(t01[3]));
221
222 uint8x8_t d01 = convolve4_8(s01[0], s01[1], s01[2], s01[3], filter);
223
224 store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
225
226 src += 2 * src_stride;
227 dst += 2 * dst_stride;
228 h -= 2;
229 } while (h > 0);
230 } else {
231 do {
232 int width = w;
233 const uint8_t *s = src;
234 uint8_t *d = dst;
235
236 do {
237 uint8x8_t t0[4], t1[4];
238 load_u8_8x4(s + 0 * src_stride, 1, &t0[0], &t0[1], &t0[2], &t0[3]);
239 load_u8_8x4(s + 1 * src_stride, 1, &t1[0], &t1[1], &t1[2], &t1[3]);
240
241 int16x8_t s0[4], s1[4];
242 s0[0] = vreinterpretq_s16_u16(vmovl_u8(t0[0]));
243 s0[1] = vreinterpretq_s16_u16(vmovl_u8(t0[1]));
244 s0[2] = vreinterpretq_s16_u16(vmovl_u8(t0[2]));
245 s0[3] = vreinterpretq_s16_u16(vmovl_u8(t0[3]));
246
247 s1[0] = vreinterpretq_s16_u16(vmovl_u8(t1[0]));
248 s1[1] = vreinterpretq_s16_u16(vmovl_u8(t1[1]));
249 s1[2] = vreinterpretq_s16_u16(vmovl_u8(t1[2]));
250 s1[3] = vreinterpretq_s16_u16(vmovl_u8(t1[3]));
251
252 uint8x8_t d0 = convolve4_8(s0[0], s0[1], s0[2], s0[3], filter);
253 uint8x8_t d1 = convolve4_8(s1[0], s1[1], s1[2], s1[3], filter);
254
255 store_u8_8x2(d, dst_stride, d0, d1);
256
257 s += 8;
258 d += 8;
259 width -= 8;
260 } while (width != 0);
261 src += 2 * src_stride;
262 dst += 2 * dst_stride;
263 h -= 2;
264 } while (h > 0);
265 }
266 }
267
aom_convolve8_horiz_neon(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)268 void aom_convolve8_horiz_neon(const uint8_t *src, ptrdiff_t src_stride,
269 uint8_t *dst, ptrdiff_t dst_stride,
270 const int16_t *filter_x, int x_step_q4,
271 const int16_t *filter_y, int y_step_q4, int w,
272 int h) {
273 assert((intptr_t)dst % 4 == 0);
274 assert(dst_stride % 4 == 0);
275
276 (void)x_step_q4;
277 (void)filter_y;
278 (void)y_step_q4;
279
280 src -= ((SUBPEL_TAPS / 2) - 1);
281
282 int filter_taps = get_filter_taps_convolve8(filter_x);
283
284 if (filter_taps == 2) {
285 convolve8_horiz_2tap_neon(src + 3, src_stride, dst, dst_stride, filter_x, w,
286 h);
287 } else if (filter_taps == 4) {
288 convolve8_horiz_4tap_neon(src + 2, src_stride, dst, dst_stride, filter_x, w,
289 h);
290 } else {
291 convolve8_horiz_8tap_neon(src, src_stride, dst, dst_stride, filter_x, w, h);
292 }
293 }
294
convolve8_vert_8tap_neon(const uint8_t * src,ptrdiff_t src_stride,uint8_t * dst,ptrdiff_t dst_stride,const int16_t * filter_y,int w,int h)295 static inline void convolve8_vert_8tap_neon(const uint8_t *src,
296 ptrdiff_t src_stride, uint8_t *dst,
297 ptrdiff_t dst_stride,
298 const int16_t *filter_y, int w,
299 int h) {
300 // All filter values are even so halve them to reduce intermediate precision
301 // requirements.
302 const int16x8_t filter = vshrq_n_s16(vld1q_s16(filter_y), 1);
303
304 if (w == 4) {
305 uint8x8_t t0, t1, t2, t3, t4, t5, t6;
306 load_u8_8x7(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
307
308 int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
309 int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
310 int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
311 int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
312 int16x4_t s4 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t4)));
313 int16x4_t s5 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t5)));
314 int16x4_t s6 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t6)));
315
316 src += 7 * src_stride;
317
318 do {
319 load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
320
321 int16x4_t s7 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
322 int16x4_t s8 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
323 int16x4_t s9 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
324 int16x4_t s10 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
325
326 int16x4_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
327 int16x4_t d1 = convolve8_4(s1, s2, s3, s4, s5, s6, s7, s8, filter);
328 int16x4_t d2 = convolve8_4(s2, s3, s4, s5, s6, s7, s8, s9, filter);
329 int16x4_t d3 = convolve8_4(s3, s4, s5, s6, s7, s8, s9, s10, filter);
330 // We halved the filter values so -1 from right shift.
331 uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS - 1);
332 uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS - 1);
333
334 store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
335 store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
336
337 s0 = s4;
338 s1 = s5;
339 s2 = s6;
340 s3 = s7;
341 s4 = s8;
342 s5 = s9;
343 s6 = s10;
344
345 src += 4 * src_stride;
346 dst += 4 * dst_stride;
347 h -= 4;
348 } while (h != 0);
349 } else {
350 do {
351 uint8x8_t t0, t1, t2, t3, t4, t5, t6;
352 load_u8_8x7(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
353
354 int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
355 int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
356 int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
357 int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
358 int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
359 int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
360 int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
361
362 int height = h;
363 const uint8_t *s = src + 7 * src_stride;
364 uint8_t *d = dst;
365
366 do {
367 load_u8_8x4(s, src_stride, &t0, &t1, &t2, &t3);
368
369 int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
370 int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
371 int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
372 int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
373
374 uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
375 uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
376 uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
377 uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
378
379 store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
380
381 s0 = s4;
382 s1 = s5;
383 s2 = s6;
384 s3 = s7;
385 s4 = s8;
386 s5 = s9;
387 s6 = s10;
388
389 s += 4 * src_stride;
390 d += 4 * dst_stride;
391 height -= 4;
392 } while (height != 0);
393 src += 8;
394 dst += 8;
395 w -= 8;
396 } while (w != 0);
397 }
398 }
399
aom_convolve8_vert_neon(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)400 void aom_convolve8_vert_neon(const uint8_t *src, ptrdiff_t src_stride,
401 uint8_t *dst, ptrdiff_t dst_stride,
402 const int16_t *filter_x, int x_step_q4,
403 const int16_t *filter_y, int y_step_q4, int w,
404 int h) {
405 assert((intptr_t)dst % 4 == 0);
406 assert(dst_stride % 4 == 0);
407
408 (void)filter_x;
409 (void)x_step_q4;
410 (void)y_step_q4;
411
412 src -= ((SUBPEL_TAPS / 2) - 1) * src_stride;
413
414 int filter_taps = get_filter_taps_convolve8(filter_y);
415
416 if (filter_taps == 2) {
417 convolve8_vert_2tap_neon(src + 3 * src_stride, src_stride, dst, dst_stride,
418 filter_y, w, h);
419 } else if (filter_taps == 4) {
420 convolve8_vert_4tap_neon(src + 2 * src_stride, src_stride, dst, dst_stride,
421 filter_y, w, h);
422 } else {
423 convolve8_vert_8tap_neon(src, src_stride, dst, dst_stride, filter_y, w, h);
424 }
425 }
426