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hpeldsp_altivec.c
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1 /*
2  * Copyright (c) 2002 Brian Foley
3  * Copyright (c) 2002 Dieter Shirley
4  * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #if HAVE_ALTIVEC_H
26 #include <altivec.h>
27 #endif
28 
29 #include "libavutil/attributes.h"
30 #include "libavutil/cpu.h"
31 #include "libavutil/ppc/cpu.h"
32 #include "libavutil/ppc/types_altivec.h"
33 #include "libavutil/ppc/util_altivec.h"
34 #include "libavcodec/hpeldsp.h"
35 #include "hpeldsp_altivec.h"
36 
37 #if HAVE_ALTIVEC
38 /* next one assumes that ((line_size % 16) == 0) */
39 void ff_put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
40 {
41  register vector unsigned char pixelsv1;
42  register vector unsigned char pixelsv1B;
43  register vector unsigned char pixelsv1C;
44  register vector unsigned char pixelsv1D;
45 
46  int i;
47  register ptrdiff_t line_size_2 = line_size << 1;
48  register ptrdiff_t line_size_3 = line_size + line_size_2;
49  register ptrdiff_t line_size_4 = line_size << 2;
50 
51 // hand-unrolling the loop by 4 gains about 15%
52 // mininum execution time goes from 74 to 60 cycles
53 // it's faster than -funroll-loops, but using
54 // -funroll-loops w/ this is bad - 74 cycles again.
55 // all this is on a 7450, tuning for the 7450
56  for (i = 0; i < h; i += 4) {
57  pixelsv1 = unaligned_load( 0, pixels);
58  pixelsv1B = unaligned_load(line_size, pixels);
59  pixelsv1C = unaligned_load(line_size_2, pixels);
60  pixelsv1D = unaligned_load(line_size_3, pixels);
61  VEC_ST(pixelsv1, 0, (unsigned char*)block);
62  VEC_ST(pixelsv1B, line_size, (unsigned char*)block);
63  VEC_ST(pixelsv1C, line_size_2, (unsigned char*)block);
64  VEC_ST(pixelsv1D, line_size_3, (unsigned char*)block);
65  pixels+=line_size_4;
66  block +=line_size_4;
67  }
68 }
69 
70 /* next one assumes that ((line_size % 16) == 0) */
71 #define op_avg(a,b) a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
72 void ff_avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
73 {
74  register vector unsigned char pixelsv, blockv;
75 
76  int i;
77  for (i = 0; i < h; i++) {
78  blockv = vec_ld(0, block);
79  pixelsv = VEC_LD( 0, pixels);
80  blockv = vec_avg(blockv,pixelsv);
81  vec_st(blockv, 0, (unsigned char*)block);
82  pixels+=line_size;
83  block +=line_size;
84  }
85 }
86 
87 /* next one assumes that ((line_size % 8) == 0) */
88 static void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, ptrdiff_t line_size, int h)
89 {
90  register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
91  int i;
92 
93  for (i = 0; i < h; i++) {
94  /* block is 8 bytes-aligned, so we're either in the
95  left block (16 bytes-aligned) or in the right block (not) */
96  int rightside = ((unsigned long)block & 0x0000000F);
97 
98  blockv = vec_ld(0, block);
99  pixelsv = VEC_LD( 0, pixels);
100 
101  if (rightside) {
102  pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));
103  } else {
104  pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));
105  }
106 
107  blockv = vec_avg(blockv, pixelsv);
108 
109  vec_st(blockv, 0, block);
110 
111  pixels += line_size;
112  block += line_size;
113  }
114 }
115 
116 /* next one assumes that ((line_size % 8) == 0) */
117 static void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
118 {
119  register int i;
120  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
121  register vector unsigned char blockv;
122  register vector unsigned short pixelssum1, pixelssum2, temp3;
123  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
124  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
125 
126  pixelsv1 = VEC_LD(0, pixels);
127  pixelsv2 = VEC_LD(1, pixels);
128  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
129  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
130 
131  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
132  (vector unsigned short)pixelsv2);
133  pixelssum1 = vec_add(pixelssum1, vctwo);
134 
135  for (i = 0; i < h ; i++) {
136  int rightside = ((unsigned long)block & 0x0000000F);
137  blockv = vec_ld(0, block);
138 
139  pixelsv1 = unaligned_load(line_size, pixels);
140  pixelsv2 = unaligned_load(line_size+1, pixels);
141  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
142  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
143  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
144  (vector unsigned short)pixelsv2);
145  temp3 = vec_add(pixelssum1, pixelssum2);
146  temp3 = vec_sra(temp3, vctwo);
147  pixelssum1 = vec_add(pixelssum2, vctwo);
148  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
149 
150  if (rightside) {
151  blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
152  } else {
153  blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
154  }
155 
156  vec_st(blockv, 0, block);
157 
158  block += line_size;
159  pixels += line_size;
160  }
161 }
162 
163 /* next one assumes that ((line_size % 8) == 0) */
164 static void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
165 {
166  register int i;
167  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
168  register vector unsigned char blockv;
169  register vector unsigned short pixelssum1, pixelssum2, temp3;
170  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
171  register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
172  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
173 
174  pixelsv1 = VEC_LD(0, pixels);
175  pixelsv2 = VEC_LD(1, pixels);
176  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
177  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
178  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
179  (vector unsigned short)pixelsv2);
180  pixelssum1 = vec_add(pixelssum1, vcone);
181 
182  for (i = 0; i < h ; i++) {
183  int rightside = ((unsigned long)block & 0x0000000F);
184  blockv = vec_ld(0, block);
185 
186  pixelsv1 = unaligned_load(line_size, pixels);
187  pixelsv2 = unaligned_load(line_size+1, pixels);
188  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
189  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
190  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
191  (vector unsigned short)pixelsv2);
192  temp3 = vec_add(pixelssum1, pixelssum2);
193  temp3 = vec_sra(temp3, vctwo);
194  pixelssum1 = vec_add(pixelssum2, vcone);
195  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
196 
197  if (rightside) {
198  blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
199  } else {
200  blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
201  }
202 
203  vec_st(blockv, 0, block);
204 
205  block += line_size;
206  pixels += line_size;
207  }
208 }
209 
210 /* next one assumes that ((line_size % 16) == 0) */
211 static void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, ptrdiff_t line_size, int h)
212 {
213  register int i;
214  register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
215  register vector unsigned char blockv;
216  register vector unsigned short temp3, temp4,
217  pixelssum1, pixelssum2, pixelssum3, pixelssum4;
218  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
219  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
220 
221  pixelsv1 = VEC_LD(0, pixels);
222  pixelsv2 = VEC_LD(1, pixels);
223  pixelsv3 = VEC_MERGEL(vczero, pixelsv1);
224  pixelsv4 = VEC_MERGEL(vczero, pixelsv2);
225  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
226  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
227  pixelssum3 = vec_add((vector unsigned short)pixelsv3,
228  (vector unsigned short)pixelsv4);
229  pixelssum3 = vec_add(pixelssum3, vctwo);
230  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
231  (vector unsigned short)pixelsv2);
232  pixelssum1 = vec_add(pixelssum1, vctwo);
233 
234  for (i = 0; i < h ; i++) {
235  blockv = vec_ld(0, block);
236 
237  pixelsv1 = unaligned_load(line_size, pixels);
238  pixelsv2 = unaligned_load(line_size+1, pixels);
239 
240  pixelsv3 = VEC_MERGEL(vczero, pixelsv1);
241  pixelsv4 = VEC_MERGEL(vczero, pixelsv2);
242  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
243  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
244  pixelssum4 = vec_add((vector unsigned short)pixelsv3,
245  (vector unsigned short)pixelsv4);
246  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
247  (vector unsigned short)pixelsv2);
248  temp4 = vec_add(pixelssum3, pixelssum4);
249  temp4 = vec_sra(temp4, vctwo);
250  temp3 = vec_add(pixelssum1, pixelssum2);
251  temp3 = vec_sra(temp3, vctwo);
252 
253  pixelssum3 = vec_add(pixelssum4, vctwo);
254  pixelssum1 = vec_add(pixelssum2, vctwo);
255 
256  blockv = vec_packsu(temp3, temp4);
257 
258  vec_st(blockv, 0, block);
259 
260  block += line_size;
261  pixels += line_size;
262  }
263 }
264 
265 /* next one assumes that ((line_size % 16) == 0) */
266 static void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, ptrdiff_t line_size, int h)
267 {
268  register int i;
269  register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
270  register vector unsigned char blockv;
271  register vector unsigned short temp3, temp4,
272  pixelssum1, pixelssum2, pixelssum3, pixelssum4;
273  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
274  register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
275  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
276 
277  pixelsv1 = VEC_LD(0, pixels);
278  pixelsv2 = VEC_LD(1, pixels);
279  pixelsv3 = VEC_MERGEL(vczero, pixelsv1);
280  pixelsv4 = VEC_MERGEL(vczero, pixelsv2);
281  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
282  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
283  pixelssum3 = vec_add((vector unsigned short)pixelsv3,
284  (vector unsigned short)pixelsv4);
285  pixelssum3 = vec_add(pixelssum3, vcone);
286  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
287  (vector unsigned short)pixelsv2);
288  pixelssum1 = vec_add(pixelssum1, vcone);
289 
290  for (i = 0; i < h ; i++) {
291  pixelsv1 = unaligned_load(line_size, pixels);
292  pixelsv2 = unaligned_load(line_size+1, pixels);
293 
294  pixelsv3 = VEC_MERGEL(vczero, pixelsv1);
295  pixelsv4 = VEC_MERGEL(vczero, pixelsv2);
296  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
297  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
298  pixelssum4 = vec_add((vector unsigned short)pixelsv3,
299  (vector unsigned short)pixelsv4);
300  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
301  (vector unsigned short)pixelsv2);
302  temp4 = vec_add(pixelssum3, pixelssum4);
303  temp4 = vec_sra(temp4, vctwo);
304  temp3 = vec_add(pixelssum1, pixelssum2);
305  temp3 = vec_sra(temp3, vctwo);
306 
307  pixelssum3 = vec_add(pixelssum4, vcone);
308  pixelssum1 = vec_add(pixelssum2, vcone);
309 
310  blockv = vec_packsu(temp3, temp4);
311 
312  VEC_ST(blockv, 0, block);
313 
314  block += line_size;
315  pixels += line_size;
316  }
317 }
318 
319 /* next one assumes that ((line_size % 8) == 0) */
320 static void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
321 {
322  register int i;
323  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
324  register vector unsigned char blockv, blocktemp;
325  register vector unsigned short pixelssum1, pixelssum2, temp3;
326 
327  register const vector unsigned char vczero = (const vector unsigned char)
328  vec_splat_u8(0);
329  register const vector unsigned short vctwo = (const vector unsigned short)
330  vec_splat_u16(2);
331 
332  pixelsv1 = VEC_LD(0, pixels);
333  pixelsv2 = VEC_LD(1, pixels);
334  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
335  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
336  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
337  (vector unsigned short)pixelsv2);
338  pixelssum1 = vec_add(pixelssum1, vctwo);
339 
340  for (i = 0; i < h ; i++) {
341  int rightside = ((unsigned long)block & 0x0000000F);
342  blockv = vec_ld(0, block);
343 
344  pixelsv1 = unaligned_load(line_size, pixels);
345  pixelsv2 = unaligned_load(line_size+1, pixels);
346 
347  pixelsv1 = VEC_MERGEH(vczero, pixelsv1);
348  pixelsv2 = VEC_MERGEH(vczero, pixelsv2);
349  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
350  (vector unsigned short)pixelsv2);
351  temp3 = vec_add(pixelssum1, pixelssum2);
352  temp3 = vec_sra(temp3, vctwo);
353  pixelssum1 = vec_add(pixelssum2, vctwo);
354  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
355 
356  if (rightside) {
357  blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
358  } else {
359  blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
360  }
361 
362  blockv = vec_avg(blocktemp, blockv);
363  vec_st(blockv, 0, block);
364 
365  block += line_size;
366  pixels += line_size;
367  }
368 }
369 #endif /* HAVE_ALTIVEC */
370 
371 av_cold void ff_hpeldsp_init_ppc(HpelDSPContext *c, int flags)
372 {
373 #if HAVE_ALTIVEC
374  if (!PPC_ALTIVEC(av_get_cpu_flags()))
375  return;
376 
377  c->avg_pixels_tab[0][0] = ff_avg_pixels16_altivec;
378  c->avg_pixels_tab[1][0] = avg_pixels8_altivec;
379  c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;
380 
381  c->put_pixels_tab[0][0] = ff_put_pixels16_altivec;
382  c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;
383  c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;
384 
385  c->put_no_rnd_pixels_tab[0][0] = ff_put_pixels16_altivec;
386  c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;
387  c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;
388 #endif /* HAVE_ALTIVEC */
389 }
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