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dsputil_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 #if HAVE_ALTIVEC_H
25 #include <altivec.h>
26 #endif
27 #include "libavutil/ppc/types_altivec.h"
28 #include "libavutil/ppc/util_altivec.h"
29 #include "libavcodec/dsputil.h"
30 #include "dsputil_altivec.h"
31 
32 static int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
33 {
34  int i;
35  int s;
36  const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
37  vector unsigned char perm1 = vec_lvsl(0, pix2);
38  vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
39  vector unsigned char pix2l, pix2r;
40  vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
41  vector unsigned int sad;
42  vector signed int sumdiffs;
43 
44  s = 0;
45  sad = (vector unsigned int)vec_splat_u32(0);
46  for (i = 0; i < h; i++) {
47  /* Read unaligned pixels into our vectors. The vectors are as follows:
48  pix1v: pix1[0]-pix1[15]
49  pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16] */
50  pix1v = vec_ld( 0, pix1);
51  pix2l = vec_ld( 0, pix2);
52  pix2r = vec_ld(16, pix2);
53  pix2v = vec_perm(pix2l, pix2r, perm1);
54  pix2iv = vec_perm(pix2l, pix2r, perm2);
55 
56  /* Calculate the average vector */
57  avgv = vec_avg(pix2v, pix2iv);
58 
59  /* Calculate a sum of abs differences vector */
60  t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
61 
62  /* Add each 4 pixel group together and put 4 results into sad */
63  sad = vec_sum4s(t5, sad);
64 
65  pix1 += line_size;
66  pix2 += line_size;
67  }
68  /* Sum up the four partial sums, and put the result into s */
69  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
70  sumdiffs = vec_splat(sumdiffs, 3);
71  vec_ste(sumdiffs, 0, &s);
72 
73  return s;
74 }
75 
76 static int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
77 {
78  int i;
79  int s;
80  const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
81  vector unsigned char perm = vec_lvsl(0, pix2);
82  vector unsigned char pix2l, pix2r;
83  vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
84  vector unsigned int sad;
85  vector signed int sumdiffs;
86  uint8_t *pix3 = pix2 + line_size;
87 
88  s = 0;
89  sad = (vector unsigned int)vec_splat_u32(0);
90 
91  /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
92  iteration becomes pix2 in the next iteration. We can use this
93  fact to avoid a potentially expensive unaligned read, each
94  time around the loop.
95  Read unaligned pixels into our vectors. The vectors are as follows:
96  pix2v: pix2[0]-pix2[15]
97  Split the pixel vectors into shorts */
98  pix2l = vec_ld( 0, pix2);
99  pix2r = vec_ld(15, pix2);
100  pix2v = vec_perm(pix2l, pix2r, perm);
101 
102  for (i = 0; i < h; i++) {
103  /* Read unaligned pixels into our vectors. The vectors are as follows:
104  pix1v: pix1[0]-pix1[15]
105  pix3v: pix3[0]-pix3[15] */
106  pix1v = vec_ld(0, pix1);
107 
108  pix2l = vec_ld( 0, pix3);
109  pix2r = vec_ld(15, pix3);
110  pix3v = vec_perm(pix2l, pix2r, perm);
111 
112  /* Calculate the average vector */
113  avgv = vec_avg(pix2v, pix3v);
114 
115  /* Calculate a sum of abs differences vector */
116  t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
117 
118  /* Add each 4 pixel group together and put 4 results into sad */
119  sad = vec_sum4s(t5, sad);
120 
121  pix1 += line_size;
122  pix2v = pix3v;
123  pix3 += line_size;
124 
125  }
126 
127  /* Sum up the four partial sums, and put the result into s */
128  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
129  sumdiffs = vec_splat(sumdiffs, 3);
130  vec_ste(sumdiffs, 0, &s);
131  return s;
132 }
133 
134 static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
135 {
136  int i;
137  int s;
138  uint8_t *pix3 = pix2 + line_size;
139  const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
140  const vector unsigned short two = (const vector unsigned short)vec_splat_u16(2);
141  vector unsigned char avgv, t5;
142  vector unsigned char perm1 = vec_lvsl(0, pix2);
143  vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
144  vector unsigned char pix2l, pix2r;
145  vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
146  vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
147  vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
148  vector unsigned short avghv, avglv;
149  vector unsigned short t1, t2, t3, t4;
150  vector unsigned int sad;
151  vector signed int sumdiffs;
152 
153  sad = (vector unsigned int)vec_splat_u32(0);
154 
155  s = 0;
156 
157  /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
158  iteration becomes pix2 in the next iteration. We can use this
159  fact to avoid a potentially expensive unaligned read, as well
160  as some splitting, and vector addition each time around the loop.
161  Read unaligned pixels into our vectors. The vectors are as follows:
162  pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16]
163  Split the pixel vectors into shorts */
164  pix2l = vec_ld( 0, pix2);
165  pix2r = vec_ld(16, pix2);
166  pix2v = vec_perm(pix2l, pix2r, perm1);
167  pix2iv = vec_perm(pix2l, pix2r, perm2);
168 
169  pix2hv = (vector unsigned short) vec_mergeh(zero, pix2v);
170  pix2lv = (vector unsigned short) vec_mergel(zero, pix2v);
171  pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);
172  pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);
173  t1 = vec_add(pix2hv, pix2ihv);
174  t2 = vec_add(pix2lv, pix2ilv);
175 
176  for (i = 0; i < h; i++) {
177  /* Read unaligned pixels into our vectors. The vectors are as follows:
178  pix1v: pix1[0]-pix1[15]
179  pix3v: pix3[0]-pix3[15] pix3iv: pix3[1]-pix3[16] */
180  pix1v = vec_ld(0, pix1);
181 
182  pix2l = vec_ld( 0, pix3);
183  pix2r = vec_ld(16, pix3);
184  pix3v = vec_perm(pix2l, pix2r, perm1);
185  pix3iv = vec_perm(pix2l, pix2r, perm2);
186 
187  /* Note that AltiVec does have vec_avg, but this works on vector pairs
188  and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
189  would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
190  Instead, we have to split the pixel vectors into vectors of shorts,
191  and do the averaging by hand. */
192 
193  /* Split the pixel vectors into shorts */
194  pix3hv = (vector unsigned short) vec_mergeh(zero, pix3v);
195  pix3lv = (vector unsigned short) vec_mergel(zero, pix3v);
196  pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);
197  pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);
198 
199  /* Do the averaging on them */
200  t3 = vec_add(pix3hv, pix3ihv);
201  t4 = vec_add(pix3lv, pix3ilv);
202 
203  avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
204  avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
205 
206  /* Pack the shorts back into a result */
207  avgv = vec_pack(avghv, avglv);
208 
209  /* Calculate a sum of abs differences vector */
210  t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
211 
212  /* Add each 4 pixel group together and put 4 results into sad */
213  sad = vec_sum4s(t5, sad);
214 
215  pix1 += line_size;
216  pix3 += line_size;
217  /* Transfer the calculated values for pix3 into pix2 */
218  t1 = t3;
219  t2 = t4;
220  }
221  /* Sum up the four partial sums, and put the result into s */
222  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
223  sumdiffs = vec_splat(sumdiffs, 3);
224  vec_ste(sumdiffs, 0, &s);
225 
226  return s;
227 }
228 
229 static int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
230 {
231  int i;
232  int s;
233  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
234  vector unsigned char perm = vec_lvsl(0, pix2);
235  vector unsigned char t1, t2, t3,t4, t5;
236  vector unsigned int sad;
237  vector signed int sumdiffs;
238 
239  sad = (vector unsigned int)vec_splat_u32(0);
240 
241 
242  for (i = 0; i < h; i++) {
243  /* Read potentially unaligned pixels into t1 and t2 */
244  vector unsigned char pix2l = vec_ld( 0, pix2);
245  vector unsigned char pix2r = vec_ld(15, pix2);
246  t1 = vec_ld(0, pix1);
247  t2 = vec_perm(pix2l, pix2r, perm);
248 
249  /* Calculate a sum of abs differences vector */
250  t3 = vec_max(t1, t2);
251  t4 = vec_min(t1, t2);
252  t5 = vec_sub(t3, t4);
253 
254  /* Add each 4 pixel group together and put 4 results into sad */
255  sad = vec_sum4s(t5, sad);
256 
257  pix1 += line_size;
258  pix2 += line_size;
259  }
260 
261  /* Sum up the four partial sums, and put the result into s */
262  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
263  sumdiffs = vec_splat(sumdiffs, 3);
264  vec_ste(sumdiffs, 0, &s);
265 
266  return s;
267 }
268 
269 static int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
270 {
271  int i;
272  int s;
273  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
274  const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
275  vector unsigned char perm1 = vec_lvsl(0, pix1);
276  vector unsigned char perm2 = vec_lvsl(0, pix2);
277  vector unsigned char t1, t2, t3,t4, t5;
278  vector unsigned int sad;
279  vector signed int sumdiffs;
280 
281  sad = (vector unsigned int)vec_splat_u32(0);
282 
283  for (i = 0; i < h; i++) {
284  /* Read potentially unaligned pixels into t1 and t2
285  Since we're reading 16 pixels, and actually only want 8,
286  mask out the last 8 pixels. The 0s don't change the sum. */
287  vector unsigned char pix1l = vec_ld( 0, pix1);
288  vector unsigned char pix1r = vec_ld(15, pix1);
289  vector unsigned char pix2l = vec_ld( 0, pix2);
290  vector unsigned char pix2r = vec_ld(15, pix2);
291  t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
292  t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
293 
294  /* Calculate a sum of abs differences vector */
295  t3 = vec_max(t1, t2);
296  t4 = vec_min(t1, t2);
297  t5 = vec_sub(t3, t4);
298 
299  /* Add each 4 pixel group together and put 4 results into sad */
300  sad = vec_sum4s(t5, sad);
301 
302  pix1 += line_size;
303  pix2 += line_size;
304  }
305 
306  /* Sum up the four partial sums, and put the result into s */
307  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
308  sumdiffs = vec_splat(sumdiffs, 3);
309  vec_ste(sumdiffs, 0, &s);
310 
311  return s;
312 }
313 
314 static int pix_norm1_altivec(uint8_t *pix, int line_size)
315 {
316  int i;
317  int s;
318  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
319  vector unsigned char perm = vec_lvsl(0, pix);
320  vector unsigned char pixv;
321  vector unsigned int sv;
322  vector signed int sum;
323 
324  sv = (vector unsigned int)vec_splat_u32(0);
325 
326  s = 0;
327  for (i = 0; i < 16; i++) {
328  /* Read in the potentially unaligned pixels */
329  vector unsigned char pixl = vec_ld( 0, pix);
330  vector unsigned char pixr = vec_ld(15, pix);
331  pixv = vec_perm(pixl, pixr, perm);
332 
333  /* Square the values, and add them to our sum */
334  sv = vec_msum(pixv, pixv, sv);
335 
336  pix += line_size;
337  }
338  /* Sum up the four partial sums, and put the result into s */
339  sum = vec_sums((vector signed int) sv, (vector signed int) zero);
340  sum = vec_splat(sum, 3);
341  vec_ste(sum, 0, &s);
342 
343  return s;
344 }
345 
346 /**
347  * Sum of Squared Errors for a 8x8 block.
348  * AltiVec-enhanced.
349  * It's the sad8_altivec code above w/ squaring added.
350  */
351 static int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
352 {
353  int i;
354  int s;
355  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
356  const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
357  vector unsigned char perm1 = vec_lvsl(0, pix1);
358  vector unsigned char perm2 = vec_lvsl(0, pix2);
359  vector unsigned char t1, t2, t3,t4, t5;
360  vector unsigned int sum;
361  vector signed int sumsqr;
362 
363  sum = (vector unsigned int)vec_splat_u32(0);
364 
365  for (i = 0; i < h; i++) {
366  /* Read potentially unaligned pixels into t1 and t2
367  Since we're reading 16 pixels, and actually only want 8,
368  mask out the last 8 pixels. The 0s don't change the sum. */
369  vector unsigned char pix1l = vec_ld( 0, pix1);
370  vector unsigned char pix1r = vec_ld(15, pix1);
371  vector unsigned char pix2l = vec_ld( 0, pix2);
372  vector unsigned char pix2r = vec_ld(15, pix2);
373  t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
374  t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
375 
376  /* Since we want to use unsigned chars, we can take advantage
377  of the fact that abs(a-b)^2 = (a-b)^2. */
378 
379  /* Calculate abs differences vector */
380  t3 = vec_max(t1, t2);
381  t4 = vec_min(t1, t2);
382  t5 = vec_sub(t3, t4);
383 
384  /* Square the values and add them to our sum */
385  sum = vec_msum(t5, t5, sum);
386 
387  pix1 += line_size;
388  pix2 += line_size;
389  }
390 
391  /* Sum up the four partial sums, and put the result into s */
392  sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
393  sumsqr = vec_splat(sumsqr, 3);
394  vec_ste(sumsqr, 0, &s);
395 
396  return s;
397 }
398 
399 /**
400  * Sum of Squared Errors for a 16x16 block.
401  * AltiVec-enhanced.
402  * It's the sad16_altivec code above w/ squaring added.
403  */
404 static int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
405 {
406  int i;
407  int s;
408  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
409  vector unsigned char perm = vec_lvsl(0, pix2);
410  vector unsigned char t1, t2, t3,t4, t5;
411  vector unsigned int sum;
412  vector signed int sumsqr;
413 
414  sum = (vector unsigned int)vec_splat_u32(0);
415 
416  for (i = 0; i < h; i++) {
417  /* Read potentially unaligned pixels into t1 and t2 */
418  vector unsigned char pix2l = vec_ld( 0, pix2);
419  vector unsigned char pix2r = vec_ld(15, pix2);
420  t1 = vec_ld(0, pix1);
421  t2 = vec_perm(pix2l, pix2r, perm);
422 
423  /* Since we want to use unsigned chars, we can take advantage
424  of the fact that abs(a-b)^2 = (a-b)^2. */
425 
426  /* Calculate abs differences vector */
427  t3 = vec_max(t1, t2);
428  t4 = vec_min(t1, t2);
429  t5 = vec_sub(t3, t4);
430 
431  /* Square the values and add them to our sum */
432  sum = vec_msum(t5, t5, sum);
433 
434  pix1 += line_size;
435  pix2 += line_size;
436  }
437 
438  /* Sum up the four partial sums, and put the result into s */
439  sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
440  sumsqr = vec_splat(sumsqr, 3);
441  vec_ste(sumsqr, 0, &s);
442 
443  return s;
444 }
445 
446 static int pix_sum_altivec(uint8_t * pix, int line_size)
447 {
448  const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
449  vector unsigned char perm = vec_lvsl(0, pix);
450  vector unsigned char t1;
451  vector unsigned int sad;
452  vector signed int sumdiffs;
453 
454  int i;
455  int s;
456 
457  sad = (vector unsigned int)vec_splat_u32(0);
458 
459  for (i = 0; i < 16; i++) {
460  /* Read the potentially unaligned 16 pixels into t1 */
461  vector unsigned char pixl = vec_ld( 0, pix);
462  vector unsigned char pixr = vec_ld(15, pix);
463  t1 = vec_perm(pixl, pixr, perm);
464 
465  /* Add each 4 pixel group together and put 4 results into sad */
466  sad = vec_sum4s(t1, sad);
467 
468  pix += line_size;
469  }
470 
471  /* Sum up the four partial sums, and put the result into s */
472  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
473  sumdiffs = vec_splat(sumdiffs, 3);
474  vec_ste(sumdiffs, 0, &s);
475 
476  return s;
477 }
478 
479 static void get_pixels_altivec(DCTELEM *av_restrict block, const uint8_t *pixels, int line_size)
480 {
481  int i;
482  vector unsigned char perm = vec_lvsl(0, pixels);
483  vector unsigned char bytes;
484  const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
485  vector signed short shorts;
486 
487  for (i = 0; i < 8; i++) {
488  // Read potentially unaligned pixels.
489  // We're reading 16 pixels, and actually only want 8,
490  // but we simply ignore the extras.
491  vector unsigned char pixl = vec_ld( 0, pixels);
492  vector unsigned char pixr = vec_ld(15, pixels);
493  bytes = vec_perm(pixl, pixr, perm);
494 
495  // convert the bytes into shorts
496  shorts = (vector signed short)vec_mergeh(zero, bytes);
497 
498  // save the data to the block, we assume the block is 16-byte aligned
499  vec_st(shorts, i*16, (vector signed short*)block);
500 
501  pixels += line_size;
502  }
503 }
504 
505 static void diff_pixels_altivec(DCTELEM *av_restrict block, const uint8_t *s1,
506  const uint8_t *s2, int stride)
507 {
508  int i;
509  vector unsigned char perm1 = vec_lvsl(0, s1);
510  vector unsigned char perm2 = vec_lvsl(0, s2);
511  vector unsigned char bytes, pixl, pixr;
512  const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
513  vector signed short shorts1, shorts2;
514 
515  for (i = 0; i < 4; i++) {
516  // Read potentially unaligned pixels
517  // We're reading 16 pixels, and actually only want 8,
518  // but we simply ignore the extras.
519  pixl = vec_ld( 0, s1);
520  pixr = vec_ld(15, s1);
521  bytes = vec_perm(pixl, pixr, perm1);
522 
523  // convert the bytes into shorts
524  shorts1 = (vector signed short)vec_mergeh(zero, bytes);
525 
526  // Do the same for the second block of pixels
527  pixl = vec_ld( 0, s2);
528  pixr = vec_ld(15, s2);
529  bytes = vec_perm(pixl, pixr, perm2);
530 
531  // convert the bytes into shorts
532  shorts2 = (vector signed short)vec_mergeh(zero, bytes);
533 
534  // Do the subtraction
535  shorts1 = vec_sub(shorts1, shorts2);
536 
537  // save the data to the block, we assume the block is 16-byte aligned
538  vec_st(shorts1, 0, (vector signed short*)block);
539 
540  s1 += stride;
541  s2 += stride;
542  block += 8;
543 
544 
545  // The code below is a copy of the code above... This is a manual
546  // unroll.
547 
548  // Read potentially unaligned pixels
549  // We're reading 16 pixels, and actually only want 8,
550  // but we simply ignore the extras.
551  pixl = vec_ld( 0, s1);
552  pixr = vec_ld(15, s1);
553  bytes = vec_perm(pixl, pixr, perm1);
554 
555  // convert the bytes into shorts
556  shorts1 = (vector signed short)vec_mergeh(zero, bytes);
557 
558  // Do the same for the second block of pixels
559  pixl = vec_ld( 0, s2);
560  pixr = vec_ld(15, s2);
561  bytes = vec_perm(pixl, pixr, perm2);
562 
563  // convert the bytes into shorts
564  shorts2 = (vector signed short)vec_mergeh(zero, bytes);
565 
566  // Do the subtraction
567  shorts1 = vec_sub(shorts1, shorts2);
568 
569  // save the data to the block, we assume the block is 16-byte aligned
570  vec_st(shorts1, 0, (vector signed short*)block);
571 
572  s1 += stride;
573  s2 += stride;
574  block += 8;
575  }
576 }
577 
578 
579 static void clear_block_altivec(DCTELEM *block) {
580  LOAD_ZERO;
581  vec_st(zero_s16v, 0, block);
582  vec_st(zero_s16v, 16, block);
583  vec_st(zero_s16v, 32, block);
584  vec_st(zero_s16v, 48, block);
585  vec_st(zero_s16v, 64, block);
586  vec_st(zero_s16v, 80, block);
587  vec_st(zero_s16v, 96, block);
588  vec_st(zero_s16v, 112, block);
589 }
590 
591 
592 static void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {
593  register int i;
594  register vector unsigned char vdst, vsrc;
595 
596  /* dst and src are 16 bytes-aligned (guaranteed) */
597  for (i = 0 ; (i + 15) < w ; i+=16) {
598  vdst = vec_ld(i, (unsigned char*)dst);
599  vsrc = vec_ld(i, (unsigned char*)src);
600  vdst = vec_add(vsrc, vdst);
601  vec_st(vdst, i, (unsigned char*)dst);
602  }
603  /* if w is not a multiple of 16 */
604  for (; (i < w) ; i++) {
605  dst[i] = src[i];
606  }
607 }
608 
609 /* next one assumes that ((line_size % 16) == 0) */
610 void ff_put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
611 {
612  register vector unsigned char pixelsv1, pixelsv2;
613  register vector unsigned char pixelsv1B, pixelsv2B;
614  register vector unsigned char pixelsv1C, pixelsv2C;
615  register vector unsigned char pixelsv1D, pixelsv2D;
616 
617  register vector unsigned char perm = vec_lvsl(0, pixels);
618  int i;
619  register int line_size_2 = line_size << 1;
620  register int line_size_3 = line_size + line_size_2;
621  register int line_size_4 = line_size << 2;
622 
623 // hand-unrolling the loop by 4 gains about 15%
624 // mininum execution time goes from 74 to 60 cycles
625 // it's faster than -funroll-loops, but using
626 // -funroll-loops w/ this is bad - 74 cycles again.
627 // all this is on a 7450, tuning for the 7450
628  for (i = 0; i < h; i += 4) {
629  pixelsv1 = vec_ld( 0, pixels);
630  pixelsv2 = vec_ld(15, pixels);
631  pixelsv1B = vec_ld(line_size, pixels);
632  pixelsv2B = vec_ld(15 + line_size, pixels);
633  pixelsv1C = vec_ld(line_size_2, pixels);
634  pixelsv2C = vec_ld(15 + line_size_2, pixels);
635  pixelsv1D = vec_ld(line_size_3, pixels);
636  pixelsv2D = vec_ld(15 + line_size_3, pixels);
637  vec_st(vec_perm(pixelsv1, pixelsv2, perm),
638  0, (unsigned char*)block);
639  vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),
640  line_size, (unsigned char*)block);
641  vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),
642  line_size_2, (unsigned char*)block);
643  vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),
644  line_size_3, (unsigned char*)block);
645  pixels+=line_size_4;
646  block +=line_size_4;
647  }
648 }
649 
650 /* next one assumes that ((line_size % 16) == 0) */
651 #define op_avg(a,b) a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
652 void ff_avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
653 {
654  register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
655  register vector unsigned char perm = vec_lvsl(0, pixels);
656  int i;
657 
658  for (i = 0; i < h; i++) {
659  pixelsv1 = vec_ld( 0, pixels);
660  pixelsv2 = vec_ld(16,pixels);
661  blockv = vec_ld(0, block);
662  pixelsv = vec_perm(pixelsv1, pixelsv2, perm);
663  blockv = vec_avg(blockv,pixelsv);
664  vec_st(blockv, 0, (unsigned char*)block);
665  pixels+=line_size;
666  block +=line_size;
667  }
668 }
669 
670 /* next one assumes that ((line_size % 8) == 0) */
671 static void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
672 {
673  register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
674  int i;
675 
676  for (i = 0; i < h; i++) {
677  /* block is 8 bytes-aligned, so we're either in the
678  left block (16 bytes-aligned) or in the right block (not) */
679  int rightside = ((unsigned long)block & 0x0000000F);
680 
681  blockv = vec_ld(0, block);
682  pixelsv1 = vec_ld( 0, pixels);
683  pixelsv2 = vec_ld(16, pixels);
684  pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));
685 
686  if (rightside) {
687  pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));
688  } else {
689  pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));
690  }
691 
692  blockv = vec_avg(blockv, pixelsv);
693 
694  vec_st(blockv, 0, block);
695 
696  pixels += line_size;
697  block += line_size;
698  }
699 }
700 
701 /* next one assumes that ((line_size % 8) == 0) */
702 static void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
703 {
704  register int i;
705  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
706  register vector unsigned char blockv, temp1, temp2;
707  register vector unsigned short pixelssum1, pixelssum2, temp3;
708  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
709  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
710 
711  temp1 = vec_ld(0, pixels);
712  temp2 = vec_ld(16, pixels);
713  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
714  if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F) {
715  pixelsv2 = temp2;
716  } else {
717  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
718  }
719  pixelsv1 = vec_mergeh(vczero, pixelsv1);
720  pixelsv2 = vec_mergeh(vczero, pixelsv2);
721  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
722  (vector unsigned short)pixelsv2);
723  pixelssum1 = vec_add(pixelssum1, vctwo);
724 
725  for (i = 0; i < h ; i++) {
726  int rightside = ((unsigned long)block & 0x0000000F);
727  blockv = vec_ld(0, block);
728 
729  temp1 = vec_ld(line_size, pixels);
730  temp2 = vec_ld(line_size + 16, pixels);
731  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
732  if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F) {
733  pixelsv2 = temp2;
734  } else {
735  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
736  }
737 
738  pixelsv1 = vec_mergeh(vczero, pixelsv1);
739  pixelsv2 = vec_mergeh(vczero, pixelsv2);
740  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
741  (vector unsigned short)pixelsv2);
742  temp3 = vec_add(pixelssum1, pixelssum2);
743  temp3 = vec_sra(temp3, vctwo);
744  pixelssum1 = vec_add(pixelssum2, vctwo);
745  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
746 
747  if (rightside) {
748  blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
749  } else {
750  blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
751  }
752 
753  vec_st(blockv, 0, block);
754 
755  block += line_size;
756  pixels += line_size;
757  }
758 }
759 
760 /* next one assumes that ((line_size % 8) == 0) */
761 static void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
762 {
763  register int i;
764  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
765  register vector unsigned char blockv, temp1, temp2;
766  register vector unsigned short pixelssum1, pixelssum2, temp3;
767  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
768  register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
769  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
770 
771  temp1 = vec_ld(0, pixels);
772  temp2 = vec_ld(16, pixels);
773  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
774  if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F) {
775  pixelsv2 = temp2;
776  } else {
777  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
778  }
779  pixelsv1 = vec_mergeh(vczero, pixelsv1);
780  pixelsv2 = vec_mergeh(vczero, pixelsv2);
781  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
782  (vector unsigned short)pixelsv2);
783  pixelssum1 = vec_add(pixelssum1, vcone);
784 
785  for (i = 0; i < h ; i++) {
786  int rightside = ((unsigned long)block & 0x0000000F);
787  blockv = vec_ld(0, block);
788 
789  temp1 = vec_ld(line_size, pixels);
790  temp2 = vec_ld(line_size + 16, pixels);
791  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
792  if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F) {
793  pixelsv2 = temp2;
794  } else {
795  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
796  }
797 
798  pixelsv1 = vec_mergeh(vczero, pixelsv1);
799  pixelsv2 = vec_mergeh(vczero, pixelsv2);
800  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
801  (vector unsigned short)pixelsv2);
802  temp3 = vec_add(pixelssum1, pixelssum2);
803  temp3 = vec_sra(temp3, vctwo);
804  pixelssum1 = vec_add(pixelssum2, vcone);
805  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
806 
807  if (rightside) {
808  blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
809  } else {
810  blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
811  }
812 
813  vec_st(blockv, 0, block);
814 
815  block += line_size;
816  pixels += line_size;
817  }
818 }
819 
820 /* next one assumes that ((line_size % 16) == 0) */
821 static void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
822 {
823  register int i;
824  register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
825  register vector unsigned char blockv, temp1, temp2;
826  register vector unsigned short temp3, temp4,
827  pixelssum1, pixelssum2, pixelssum3, pixelssum4;
828  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
829  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
830 
831  temp1 = vec_ld(0, pixels);
832  temp2 = vec_ld(16, pixels);
833  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
834  if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F) {
835  pixelsv2 = temp2;
836  } else {
837  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
838  }
839  pixelsv3 = vec_mergel(vczero, pixelsv1);
840  pixelsv4 = vec_mergel(vczero, pixelsv2);
841  pixelsv1 = vec_mergeh(vczero, pixelsv1);
842  pixelsv2 = vec_mergeh(vczero, pixelsv2);
843  pixelssum3 = vec_add((vector unsigned short)pixelsv3,
844  (vector unsigned short)pixelsv4);
845  pixelssum3 = vec_add(pixelssum3, vctwo);
846  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
847  (vector unsigned short)pixelsv2);
848  pixelssum1 = vec_add(pixelssum1, vctwo);
849 
850  for (i = 0; i < h ; i++) {
851  blockv = vec_ld(0, block);
852 
853  temp1 = vec_ld(line_size, pixels);
854  temp2 = vec_ld(line_size + 16, pixels);
855  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
856  if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F) {
857  pixelsv2 = temp2;
858  } else {
859  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
860  }
861 
862  pixelsv3 = vec_mergel(vczero, pixelsv1);
863  pixelsv4 = vec_mergel(vczero, pixelsv2);
864  pixelsv1 = vec_mergeh(vczero, pixelsv1);
865  pixelsv2 = vec_mergeh(vczero, pixelsv2);
866 
867  pixelssum4 = vec_add((vector unsigned short)pixelsv3,
868  (vector unsigned short)pixelsv4);
869  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
870  (vector unsigned short)pixelsv2);
871  temp4 = vec_add(pixelssum3, pixelssum4);
872  temp4 = vec_sra(temp4, vctwo);
873  temp3 = vec_add(pixelssum1, pixelssum2);
874  temp3 = vec_sra(temp3, vctwo);
875 
876  pixelssum3 = vec_add(pixelssum4, vctwo);
877  pixelssum1 = vec_add(pixelssum2, vctwo);
878 
879  blockv = vec_packsu(temp3, temp4);
880 
881  vec_st(blockv, 0, block);
882 
883  block += line_size;
884  pixels += line_size;
885  }
886 }
887 
888 /* next one assumes that ((line_size % 16) == 0) */
889 static void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
890 {
891  register int i;
892  register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
893  register vector unsigned char blockv, temp1, temp2;
894  register vector unsigned short temp3, temp4,
895  pixelssum1, pixelssum2, pixelssum3, pixelssum4;
896  register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
897  register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
898  register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
899 
900  temp1 = vec_ld(0, pixels);
901  temp2 = vec_ld(16, pixels);
902  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
903  if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F) {
904  pixelsv2 = temp2;
905  } else {
906  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
907  }
908  pixelsv3 = vec_mergel(vczero, pixelsv1);
909  pixelsv4 = vec_mergel(vczero, pixelsv2);
910  pixelsv1 = vec_mergeh(vczero, pixelsv1);
911  pixelsv2 = vec_mergeh(vczero, pixelsv2);
912  pixelssum3 = vec_add((vector unsigned short)pixelsv3,
913  (vector unsigned short)pixelsv4);
914  pixelssum3 = vec_add(pixelssum3, vcone);
915  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
916  (vector unsigned short)pixelsv2);
917  pixelssum1 = vec_add(pixelssum1, vcone);
918 
919  for (i = 0; i < h ; i++) {
920  blockv = vec_ld(0, block);
921 
922  temp1 = vec_ld(line_size, pixels);
923  temp2 = vec_ld(line_size + 16, pixels);
924  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
925  if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F) {
926  pixelsv2 = temp2;
927  } else {
928  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
929  }
930 
931  pixelsv3 = vec_mergel(vczero, pixelsv1);
932  pixelsv4 = vec_mergel(vczero, pixelsv2);
933  pixelsv1 = vec_mergeh(vczero, pixelsv1);
934  pixelsv2 = vec_mergeh(vczero, pixelsv2);
935 
936  pixelssum4 = vec_add((vector unsigned short)pixelsv3,
937  (vector unsigned short)pixelsv4);
938  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
939  (vector unsigned short)pixelsv2);
940  temp4 = vec_add(pixelssum3, pixelssum4);
941  temp4 = vec_sra(temp4, vctwo);
942  temp3 = vec_add(pixelssum1, pixelssum2);
943  temp3 = vec_sra(temp3, vctwo);
944 
945  pixelssum3 = vec_add(pixelssum4, vcone);
946  pixelssum1 = vec_add(pixelssum2, vcone);
947 
948  blockv = vec_packsu(temp3, temp4);
949 
950  vec_st(blockv, 0, block);
951 
952  block += line_size;
953  pixels += line_size;
954  }
955 }
956 
957 static int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
958  int sum;
959  register const vector unsigned char vzero =
960  (const vector unsigned char)vec_splat_u8(0);
961  register vector signed short temp0, temp1, temp2, temp3, temp4,
962  temp5, temp6, temp7;
963  {
964  register const vector signed short vprod1 =(const vector signed short)
965  { 1,-1, 1,-1, 1,-1, 1,-1 };
966  register const vector signed short vprod2 =(const vector signed short)
967  { 1, 1,-1,-1, 1, 1,-1,-1 };
968  register const vector signed short vprod3 =(const vector signed short)
969  { 1, 1, 1, 1,-1,-1,-1,-1 };
970  register const vector unsigned char perm1 = (const vector unsigned char)
971  {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
972  0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
973  register const vector unsigned char perm2 = (const vector unsigned char)
974  {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
975  0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
976  register const vector unsigned char perm3 = (const vector unsigned char)
977  {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
978  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
979 
980 #define ONEITERBUTTERFLY(i, res) \
981  { \
982  register vector unsigned char src1, src2, srcO; \
983  register vector unsigned char dst1, dst2, dstO; \
984  register vector signed short srcV, dstV; \
985  register vector signed short but0, but1, but2, op1, op2, op3; \
986  src1 = vec_ld(stride * i, src); \
987  src2 = vec_ld((stride * i) + 15, src); \
988  srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
989  dst1 = vec_ld(stride * i, dst); \
990  dst2 = vec_ld((stride * i) + 15, dst); \
991  dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
992  /* promote the unsigned chars to signed shorts */ \
993  /* we're in the 8x8 function, we only care for the first 8 */ \
994  srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
995  (vector signed char)srcO); \
996  dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
997  (vector signed char)dstO); \
998  /* subtractions inside the first butterfly */ \
999  but0 = vec_sub(srcV, dstV); \
1000  op1 = vec_perm(but0, but0, perm1); \
1001  but1 = vec_mladd(but0, vprod1, op1); \
1002  op2 = vec_perm(but1, but1, perm2); \
1003  but2 = vec_mladd(but1, vprod2, op2); \
1004  op3 = vec_perm(but2, but2, perm3); \
1005  res = vec_mladd(but2, vprod3, op3); \
1006  }
1007  ONEITERBUTTERFLY(0, temp0);
1008  ONEITERBUTTERFLY(1, temp1);
1009  ONEITERBUTTERFLY(2, temp2);
1010  ONEITERBUTTERFLY(3, temp3);
1011  ONEITERBUTTERFLY(4, temp4);
1012  ONEITERBUTTERFLY(5, temp5);
1013  ONEITERBUTTERFLY(6, temp6);
1014  ONEITERBUTTERFLY(7, temp7);
1015  }
1016 #undef ONEITERBUTTERFLY
1017  {
1018  register vector signed int vsum;
1019  register vector signed short line0 = vec_add(temp0, temp1);
1020  register vector signed short line1 = vec_sub(temp0, temp1);
1021  register vector signed short line2 = vec_add(temp2, temp3);
1022  register vector signed short line3 = vec_sub(temp2, temp3);
1023  register vector signed short line4 = vec_add(temp4, temp5);
1024  register vector signed short line5 = vec_sub(temp4, temp5);
1025  register vector signed short line6 = vec_add(temp6, temp7);
1026  register vector signed short line7 = vec_sub(temp6, temp7);
1027 
1028  register vector signed short line0B = vec_add(line0, line2);
1029  register vector signed short line2B = vec_sub(line0, line2);
1030  register vector signed short line1B = vec_add(line1, line3);
1031  register vector signed short line3B = vec_sub(line1, line3);
1032  register vector signed short line4B = vec_add(line4, line6);
1033  register vector signed short line6B = vec_sub(line4, line6);
1034  register vector signed short line5B = vec_add(line5, line7);
1035  register vector signed short line7B = vec_sub(line5, line7);
1036 
1037  register vector signed short line0C = vec_add(line0B, line4B);
1038  register vector signed short line4C = vec_sub(line0B, line4B);
1039  register vector signed short line1C = vec_add(line1B, line5B);
1040  register vector signed short line5C = vec_sub(line1B, line5B);
1041  register vector signed short line2C = vec_add(line2B, line6B);
1042  register vector signed short line6C = vec_sub(line2B, line6B);
1043  register vector signed short line3C = vec_add(line3B, line7B);
1044  register vector signed short line7C = vec_sub(line3B, line7B);
1045 
1046  vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
1047  vsum = vec_sum4s(vec_abs(line1C), vsum);
1048  vsum = vec_sum4s(vec_abs(line2C), vsum);
1049  vsum = vec_sum4s(vec_abs(line3C), vsum);
1050  vsum = vec_sum4s(vec_abs(line4C), vsum);
1051  vsum = vec_sum4s(vec_abs(line5C), vsum);
1052  vsum = vec_sum4s(vec_abs(line6C), vsum);
1053  vsum = vec_sum4s(vec_abs(line7C), vsum);
1054  vsum = vec_sums(vsum, (vector signed int)vzero);
1055  vsum = vec_splat(vsum, 3);
1056  vec_ste(vsum, 0, &sum);
1057  }
1058  return sum;
1059 }
1060 
1061 /*
1062 16x8 works with 16 elements; it allows to avoid replicating loads, and
1063 give the compiler more rooms for scheduling. It's only used from
1064 inside hadamard8_diff16_altivec.
1065 
1066 Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has a LOT
1067 of spill code, it seems gcc (unlike xlc) cannot keep everything in registers
1068 by itself. The following code include hand-made registers allocation. It's not
1069 clean, but on a 7450 the resulting code is much faster (best case fall from
1070 700+ cycles to 550).
1071 
1072 xlc doesn't add spill code, but it doesn't know how to schedule for the 7450,
1073 and its code isn't much faster than gcc-3.3 on the 7450 (but uses 25% less
1074 instructions...)
1075 
1076 On the 970, the hand-made RA is still a win (around 690 vs. around 780), but
1077 xlc goes to around 660 on the regular C code...
1078 */
1079 
1080 static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {
1081  int sum;
1082  register vector signed short
1083  temp0 __asm__ ("v0"),
1084  temp1 __asm__ ("v1"),
1085  temp2 __asm__ ("v2"),
1086  temp3 __asm__ ("v3"),
1087  temp4 __asm__ ("v4"),
1088  temp5 __asm__ ("v5"),
1089  temp6 __asm__ ("v6"),
1090  temp7 __asm__ ("v7");
1091  register vector signed short
1092  temp0S __asm__ ("v8"),
1093  temp1S __asm__ ("v9"),
1094  temp2S __asm__ ("v10"),
1095  temp3S __asm__ ("v11"),
1096  temp4S __asm__ ("v12"),
1097  temp5S __asm__ ("v13"),
1098  temp6S __asm__ ("v14"),
1099  temp7S __asm__ ("v15");
1100  register const vector unsigned char vzero __asm__ ("v31") =
1101  (const vector unsigned char)vec_splat_u8(0);
1102  {
1103  register const vector signed short vprod1 __asm__ ("v16") =
1104  (const vector signed short){ 1,-1, 1,-1, 1,-1, 1,-1 };
1105  register const vector signed short vprod2 __asm__ ("v17") =
1106  (const vector signed short){ 1, 1,-1,-1, 1, 1,-1,-1 };
1107  register const vector signed short vprod3 __asm__ ("v18") =
1108  (const vector signed short){ 1, 1, 1, 1,-1,-1,-1,-1 };
1109  register const vector unsigned char perm1 __asm__ ("v19") =
1110  (const vector unsigned char)
1111  {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
1112  0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
1113  register const vector unsigned char perm2 __asm__ ("v20") =
1114  (const vector unsigned char)
1115  {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
1116  0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
1117  register const vector unsigned char perm3 __asm__ ("v21") =
1118  (const vector unsigned char)
1119  {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
1120  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
1121 
1122 #define ONEITERBUTTERFLY(i, res1, res2) \
1123  { \
1124  register vector unsigned char src1 __asm__ ("v22"), \
1125  src2 __asm__ ("v23"), \
1126  dst1 __asm__ ("v24"), \
1127  dst2 __asm__ ("v25"), \
1128  srcO __asm__ ("v22"), \
1129  dstO __asm__ ("v23"); \
1130  \
1131  register vector signed short srcV __asm__ ("v24"), \
1132  dstV __asm__ ("v25"), \
1133  srcW __asm__ ("v26"), \
1134  dstW __asm__ ("v27"), \
1135  but0 __asm__ ("v28"), \
1136  but0S __asm__ ("v29"), \
1137  op1 __asm__ ("v30"), \
1138  but1 __asm__ ("v22"), \
1139  op1S __asm__ ("v23"), \
1140  but1S __asm__ ("v24"), \
1141  op2 __asm__ ("v25"), \
1142  but2 __asm__ ("v26"), \
1143  op2S __asm__ ("v27"), \
1144  but2S __asm__ ("v28"), \
1145  op3 __asm__ ("v29"), \
1146  op3S __asm__ ("v30"); \
1147  \
1148  src1 = vec_ld(stride * i, src); \
1149  src2 = vec_ld((stride * i) + 16, src); \
1150  srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
1151  dst1 = vec_ld(stride * i, dst); \
1152  dst2 = vec_ld((stride * i) + 16, dst); \
1153  dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
1154  /* promote the unsigned chars to signed shorts */ \
1155  srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
1156  (vector signed char)srcO); \
1157  dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
1158  (vector signed char)dstO); \
1159  srcW = (vector signed short)vec_mergel((vector signed char)vzero, \
1160  (vector signed char)srcO); \
1161  dstW = (vector signed short)vec_mergel((vector signed char)vzero, \
1162  (vector signed char)dstO); \
1163  /* subtractions inside the first butterfly */ \
1164  but0 = vec_sub(srcV, dstV); \
1165  but0S = vec_sub(srcW, dstW); \
1166  op1 = vec_perm(but0, but0, perm1); \
1167  but1 = vec_mladd(but0, vprod1, op1); \
1168  op1S = vec_perm(but0S, but0S, perm1); \
1169  but1S = vec_mladd(but0S, vprod1, op1S); \
1170  op2 = vec_perm(but1, but1, perm2); \
1171  but2 = vec_mladd(but1, vprod2, op2); \
1172  op2S = vec_perm(but1S, but1S, perm2); \
1173  but2S = vec_mladd(but1S, vprod2, op2S); \
1174  op3 = vec_perm(but2, but2, perm3); \
1175  res1 = vec_mladd(but2, vprod3, op3); \
1176  op3S = vec_perm(but2S, but2S, perm3); \
1177  res2 = vec_mladd(but2S, vprod3, op3S); \
1178  }
1179  ONEITERBUTTERFLY(0, temp0, temp0S);
1180  ONEITERBUTTERFLY(1, temp1, temp1S);
1181  ONEITERBUTTERFLY(2, temp2, temp2S);
1182  ONEITERBUTTERFLY(3, temp3, temp3S);
1183  ONEITERBUTTERFLY(4, temp4, temp4S);
1184  ONEITERBUTTERFLY(5, temp5, temp5S);
1185  ONEITERBUTTERFLY(6, temp6, temp6S);
1186  ONEITERBUTTERFLY(7, temp7, temp7S);
1187  }
1188 #undef ONEITERBUTTERFLY
1189  {
1190  register vector signed int vsum;
1191  register vector signed short line0S, line1S, line2S, line3S, line4S,
1192  line5S, line6S, line7S, line0BS,line2BS,
1193  line1BS,line3BS,line4BS,line6BS,line5BS,
1194  line7BS,line0CS,line4CS,line1CS,line5CS,
1195  line2CS,line6CS,line3CS,line7CS;
1196 
1197  register vector signed short line0 = vec_add(temp0, temp1);
1198  register vector signed short line1 = vec_sub(temp0, temp1);
1199  register vector signed short line2 = vec_add(temp2, temp3);
1200  register vector signed short line3 = vec_sub(temp2, temp3);
1201  register vector signed short line4 = vec_add(temp4, temp5);
1202  register vector signed short line5 = vec_sub(temp4, temp5);
1203  register vector signed short line6 = vec_add(temp6, temp7);
1204  register vector signed short line7 = vec_sub(temp6, temp7);
1205 
1206  register vector signed short line0B = vec_add(line0, line2);
1207  register vector signed short line2B = vec_sub(line0, line2);
1208  register vector signed short line1B = vec_add(line1, line3);
1209  register vector signed short line3B = vec_sub(line1, line3);
1210  register vector signed short line4B = vec_add(line4, line6);
1211  register vector signed short line6B = vec_sub(line4, line6);
1212  register vector signed short line5B = vec_add(line5, line7);
1213  register vector signed short line7B = vec_sub(line5, line7);
1214 
1215  register vector signed short line0C = vec_add(line0B, line4B);
1216  register vector signed short line4C = vec_sub(line0B, line4B);
1217  register vector signed short line1C = vec_add(line1B, line5B);
1218  register vector signed short line5C = vec_sub(line1B, line5B);
1219  register vector signed short line2C = vec_add(line2B, line6B);
1220  register vector signed short line6C = vec_sub(line2B, line6B);
1221  register vector signed short line3C = vec_add(line3B, line7B);
1222  register vector signed short line7C = vec_sub(line3B, line7B);
1223 
1224  vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
1225  vsum = vec_sum4s(vec_abs(line1C), vsum);
1226  vsum = vec_sum4s(vec_abs(line2C), vsum);
1227  vsum = vec_sum4s(vec_abs(line3C), vsum);
1228  vsum = vec_sum4s(vec_abs(line4C), vsum);
1229  vsum = vec_sum4s(vec_abs(line5C), vsum);
1230  vsum = vec_sum4s(vec_abs(line6C), vsum);
1231  vsum = vec_sum4s(vec_abs(line7C), vsum);
1232 
1233  line0S = vec_add(temp0S, temp1S);
1234  line1S = vec_sub(temp0S, temp1S);
1235  line2S = vec_add(temp2S, temp3S);
1236  line3S = vec_sub(temp2S, temp3S);
1237  line4S = vec_add(temp4S, temp5S);
1238  line5S = vec_sub(temp4S, temp5S);
1239  line6S = vec_add(temp6S, temp7S);
1240  line7S = vec_sub(temp6S, temp7S);
1241 
1242  line0BS = vec_add(line0S, line2S);
1243  line2BS = vec_sub(line0S, line2S);
1244  line1BS = vec_add(line1S, line3S);
1245  line3BS = vec_sub(line1S, line3S);
1246  line4BS = vec_add(line4S, line6S);
1247  line6BS = vec_sub(line4S, line6S);
1248  line5BS = vec_add(line5S, line7S);
1249  line7BS = vec_sub(line5S, line7S);
1250 
1251  line0CS = vec_add(line0BS, line4BS);
1252  line4CS = vec_sub(line0BS, line4BS);
1253  line1CS = vec_add(line1BS, line5BS);
1254  line5CS = vec_sub(line1BS, line5BS);
1255  line2CS = vec_add(line2BS, line6BS);
1256  line6CS = vec_sub(line2BS, line6BS);
1257  line3CS = vec_add(line3BS, line7BS);
1258  line7CS = vec_sub(line3BS, line7BS);
1259 
1260  vsum = vec_sum4s(vec_abs(line0CS), vsum);
1261  vsum = vec_sum4s(vec_abs(line1CS), vsum);
1262  vsum = vec_sum4s(vec_abs(line2CS), vsum);
1263  vsum = vec_sum4s(vec_abs(line3CS), vsum);
1264  vsum = vec_sum4s(vec_abs(line4CS), vsum);
1265  vsum = vec_sum4s(vec_abs(line5CS), vsum);
1266  vsum = vec_sum4s(vec_abs(line6CS), vsum);
1267  vsum = vec_sum4s(vec_abs(line7CS), vsum);
1268  vsum = vec_sums(vsum, (vector signed int)vzero);
1269  vsum = vec_splat(vsum, 3);
1270  vec_ste(vsum, 0, &sum);
1271  }
1272  return sum;
1273 }
1274 
1275 static int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
1276  int score;
1277  score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
1278  if (h==16) {
1279  dst += 8*stride;
1280  src += 8*stride;
1281  score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
1282  }
1283  return score;
1284 }
1285 
1286 static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
1287  int blocksize)
1288 {
1289  int i;
1290  vector float m, a;
1291  vector bool int t0, t1;
1292  const vector unsigned int v_31 = //XXX
1293  vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
1294  for (i = 0; i < blocksize; i += 4) {
1295  m = vec_ld(0, mag+i);
1296  a = vec_ld(0, ang+i);
1297  t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
1298  t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
1299  a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
1300  t0 = (vector bool int)vec_and(a, t1);
1301  t1 = (vector bool int)vec_andc(a, t1);
1302  a = vec_sub(m, (vector float)t1);
1303  m = vec_add(m, (vector float)t0);
1304  vec_stl(a, 0, ang+i);
1305  vec_stl(m, 0, mag+i);
1306  }
1307 }
1308 
1309 /* next one assumes that ((line_size % 8) == 0) */
1310 static void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
1311 {
1312  register int i;
1313  register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
1314  register vector unsigned char blockv, temp1, temp2, blocktemp;
1315  register vector unsigned short pixelssum1, pixelssum2, temp3;
1316 
1317  register const vector unsigned char vczero = (const vector unsigned char)
1318  vec_splat_u8(0);
1319  register const vector unsigned short vctwo = (const vector unsigned short)
1320  vec_splat_u16(2);
1321 
1322  temp1 = vec_ld(0, pixels);
1323  temp2 = vec_ld(16, pixels);
1324  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
1325  if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F) {
1326  pixelsv2 = temp2;
1327  } else {
1328  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
1329  }
1330  pixelsv1 = vec_mergeh(vczero, pixelsv1);
1331  pixelsv2 = vec_mergeh(vczero, pixelsv2);
1332  pixelssum1 = vec_add((vector unsigned short)pixelsv1,
1333  (vector unsigned short)pixelsv2);
1334  pixelssum1 = vec_add(pixelssum1, vctwo);
1335 
1336  for (i = 0; i < h ; i++) {
1337  int rightside = ((unsigned long)block & 0x0000000F);
1338  blockv = vec_ld(0, block);
1339 
1340  temp1 = vec_ld(line_size, pixels);
1341  temp2 = vec_ld(line_size + 16, pixels);
1342  pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
1343  if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F) {
1344  pixelsv2 = temp2;
1345  } else {
1346  pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
1347  }
1348 
1349  pixelsv1 = vec_mergeh(vczero, pixelsv1);
1350  pixelsv2 = vec_mergeh(vczero, pixelsv2);
1351  pixelssum2 = vec_add((vector unsigned short)pixelsv1,
1352  (vector unsigned short)pixelsv2);
1353  temp3 = vec_add(pixelssum1, pixelssum2);
1354  temp3 = vec_sra(temp3, vctwo);
1355  pixelssum1 = vec_add(pixelssum2, vctwo);
1356  pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
1357 
1358  if (rightside) {
1359  blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
1360  } else {
1361  blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
1362  }
1363 
1364  blockv = vec_avg(blocktemp, blockv);
1365  vec_st(blockv, 0, block);
1366 
1367  block += line_size;
1368  pixels += line_size;
1369  }
1370 }
1371 
1372 void ff_dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
1373 {
1374  const int high_bit_depth = avctx->bits_per_raw_sample > 8;
1375 
1376  c->pix_abs[0][1] = sad16_x2_altivec;
1377  c->pix_abs[0][2] = sad16_y2_altivec;
1378  c->pix_abs[0][3] = sad16_xy2_altivec;
1379  c->pix_abs[0][0] = sad16_altivec;
1380  c->pix_abs[1][0] = sad8_altivec;
1381  c->sad[0]= sad16_altivec;
1382  c->sad[1]= sad8_altivec;
1383  c->pix_norm1 = pix_norm1_altivec;
1384  c->sse[1]= sse8_altivec;
1385  c->sse[0]= sse16_altivec;
1386  c->pix_sum = pix_sum_altivec;
1387  c->diff_pixels = diff_pixels_altivec;
1388  c->add_bytes= add_bytes_altivec;
1389  if (!high_bit_depth) {
1390  c->get_pixels = get_pixels_altivec;
1391  c->clear_block = clear_block_altivec;
1392  c->put_pixels_tab[0][0] = ff_put_pixels16_altivec;
1393  /* the two functions do the same thing, so use the same code */
1394  c->put_no_rnd_pixels_tab[0][0] = ff_put_pixels16_altivec;
1395  c->avg_pixels_tab[0][0] = ff_avg_pixels16_altivec;
1396  c->avg_pixels_tab[1][0] = avg_pixels8_altivec;
1397  c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;
1398  c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;
1399  c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;
1400  c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;
1401  c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;
1402  }
1403 
1404  c->hadamard8_diff[0] = hadamard8_diff16_altivec;
1405  c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
1406  if (CONFIG_VORBIS_DECODER)
1407  c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
1408 }
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