FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
me_cmp.c
Go to the documentation of this file.
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 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/ppc/cpu.h"
28 #include "libavutil/ppc/util_altivec.h"
29 
30 #include "libavcodec/avcodec.h"
31 #include "libavcodec/mpegvideo.h"
32 #include "libavcodec/me_cmp.h"
33 
34 #if HAVE_ALTIVEC
35 
36 #if HAVE_BIGENDIAN
37 #define GET_PERM(per1, per2, pix) {\
38  per1 = vec_lvsl(0, pix);\
39  per2 = vec_add(per1, vec_splat_u8(1));\
40 }
41 #define LOAD_PIX(v, iv, pix, per1, per2) {\
42  vector unsigned char pix2l = vec_ld(0, pix);\
43  vector unsigned char pix2r = vec_ld(16, pix);\
44  v = vec_perm(pix2l, pix2r, per1);\
45  iv = vec_perm(pix2l, pix2r, per2);\
46 }
47 #else
48 #define GET_PERM(per1, per2, pix) {}
49 #define LOAD_PIX(v, iv, pix, per1, per2) {\
50  v = vec_vsx_ld(0, pix);\
51  iv = vec_vsx_ld(1, pix);\
52 }
53 #endif
54 static int sad16_x2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
55  ptrdiff_t stride, int h)
56 {
57  int i;
58  int __attribute__((aligned(16))) s = 0;
59  const vector unsigned char zero =
60  (const vector unsigned char) vec_splat_u8(0);
61  vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
62  vector signed int sumdiffs;
63  vector unsigned char perm1, perm2, pix2v, pix2iv;
64 
65  GET_PERM(perm1, perm2, pix2);
66  for (i = 0; i < h; i++) {
67  /* Read unaligned pixels into our vectors. The vectors are as follows:
68  * pix1v: pix1[0] - pix1[15]
69  * pix2v: pix2[0] - pix2[15] pix2iv: pix2[1] - pix2[16] */
70  vector unsigned char pix1v = vec_ld(0, pix1);
71  LOAD_PIX(pix2v, pix2iv, pix2, perm1, perm2);
72 
73  /* Calculate the average vector. */
74  vector unsigned char avgv = vec_avg(pix2v, pix2iv);
75 
76  /* Calculate a sum of abs differences vector. */
77  vector unsigned char t5 = vec_sub(vec_max(pix1v, avgv),
78  vec_min(pix1v, avgv));
79 
80  /* Add each 4 pixel group together and put 4 results into sad. */
81  sad = vec_sum4s(t5, sad);
82 
83  pix1 += stride;
84  pix2 += stride;
85  }
86  /* Sum up the four partial sums, and put the result into s. */
87  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
88  sumdiffs = vec_splat(sumdiffs, 3);
89  vec_ste(sumdiffs, 0, &s);
90 
91  return s;
92 }
93 
94 static int sad16_y2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
95  ptrdiff_t stride, int h)
96 {
97  int i;
98  int __attribute__((aligned(16))) s = 0;
99  const vector unsigned char zero =
100  (const vector unsigned char) vec_splat_u8(0);
101  vector unsigned char pix1v, pix3v, avgv, t5;
102  vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
103  vector signed int sumdiffs;
104 
105  uint8_t *pix3 = pix2 + stride;
106 
107  /* Due to the fact that pix3 = pix2 + stride, the pix3 of one
108  * iteration becomes pix2 in the next iteration. We can use this
109  * fact to avoid a potentially expensive unaligned read, each
110  * time around the loop.
111  * Read unaligned pixels into our vectors. The vectors are as follows:
112  * pix2v: pix2[0] - pix2[15]
113  * Split the pixel vectors into shorts. */
114  vector unsigned char pix2v = VEC_LD(0, pix2);
115 
116  for (i = 0; i < h; i++) {
117  /* Read unaligned pixels into our vectors. The vectors are as follows:
118  * pix1v: pix1[0] - pix1[15]
119  * pix3v: pix3[0] - pix3[15] */
120  pix1v = vec_ld(0, pix1);
121  pix3v = VEC_LD(0, pix3);
122 
123  /* Calculate the average vector. */
124  avgv = vec_avg(pix2v, pix3v);
125 
126  /* Calculate a sum of abs differences vector. */
127  t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
128 
129  /* Add each 4 pixel group together and put 4 results into sad. */
130  sad = vec_sum4s(t5, sad);
131 
132  pix1 += stride;
133  pix2v = pix3v;
134  pix3 += stride;
135  }
136 
137  /* Sum up the four partial sums, and put the result into s. */
138  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
139  sumdiffs = vec_splat(sumdiffs, 3);
140  vec_ste(sumdiffs, 0, &s);
141  return s;
142 }
143 
144 static int sad16_xy2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
145  ptrdiff_t stride, int h)
146 {
147  int i;
148  int __attribute__((aligned(16))) s = 0;
149  uint8_t *pix3 = pix2 + stride;
150  const vector unsigned char zero =
151  (const vector unsigned char) vec_splat_u8(0);
152  const vector unsigned short two =
153  (const vector unsigned short) vec_splat_u16(2);
154  vector unsigned char avgv, t5;
155  vector unsigned char pix1v, pix3v, pix3iv;
156  vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
157  vector unsigned short avghv, avglv;
158  vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
159  vector signed int sumdiffs;
160  vector unsigned char perm1, perm2, pix2v, pix2iv;
161  GET_PERM(perm1, perm2, pix2);
162 
163  /* Due to the fact that pix3 = pix2 + stride, the pix3 of one
164  * iteration becomes pix2 in the next iteration. We can use this
165  * fact to avoid a potentially expensive unaligned read, as well
166  * as some splitting, and vector addition each time around the loop.
167  * Read unaligned pixels into our vectors. The vectors are as follows:
168  * pix2v: pix2[0] - pix2[15] pix2iv: pix2[1] - pix2[16]
169  * Split the pixel vectors into shorts. */
170  LOAD_PIX(pix2v, pix2iv, pix2, perm1, perm2);
171  vector unsigned short pix2hv =
172  (vector unsigned short) VEC_MERGEH(zero, pix2v);
173  vector unsigned short pix2lv =
174  (vector unsigned short) VEC_MERGEL(zero, pix2v);
175  vector unsigned short pix2ihv =
176  (vector unsigned short) VEC_MERGEH(zero, pix2iv);
177  vector unsigned short pix2ilv =
178  (vector unsigned short) VEC_MERGEL(zero, pix2iv);
179 
180  vector unsigned short t1 = vec_add(pix2hv, pix2ihv);
181  vector unsigned short t2 = vec_add(pix2lv, pix2ilv);
182  vector unsigned short t3, t4;
183 
184  for (i = 0; i < h; i++) {
185  /* Read unaligned pixels into our vectors. The vectors are as follows:
186  * pix1v: pix1[0] - pix1[15]
187  * pix3v: pix3[0] - pix3[15] pix3iv: pix3[1] - pix3[16] */
188  pix1v = vec_ld(0, pix1);
189  LOAD_PIX(pix3v, pix3iv, pix3, perm1, perm2);
190 
191  /* Note that AltiVec does have vec_avg, but this works on vector pairs
192  * and rounds up. We could do avg(avg(a, b), avg(c, d)), but the
193  * rounding would mean that, for example, avg(3, 0, 0, 1) = 2, when
194  * it should be 1. Instead, we have to split the pixel vectors into
195  * vectors of shorts and do the averaging by hand. */
196 
197  /* Split the pixel vectors into shorts. */
198  pix3hv = (vector unsigned short) VEC_MERGEH(zero, pix3v);
199  pix3lv = (vector unsigned short) VEC_MERGEL(zero, pix3v);
200  pix3ihv = (vector unsigned short) VEC_MERGEH(zero, pix3iv);
201  pix3ilv = (vector unsigned short) VEC_MERGEL(zero, pix3iv);
202 
203  /* Do the averaging on them. */
204  t3 = vec_add(pix3hv, pix3ihv);
205  t4 = vec_add(pix3lv, pix3ilv);
206 
207  avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
208  avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
209 
210  /* Pack the shorts back into a result. */
211  avgv = vec_pack(avghv, avglv);
212 
213  /* Calculate a sum of abs differences vector. */
214  t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
215 
216  /* Add each 4 pixel group together and put 4 results into sad. */
217  sad = vec_sum4s(t5, sad);
218 
219  pix1 += stride;
220  pix3 += stride;
221  /* Transfer the calculated values for pix3 into pix2. */
222  t1 = t3;
223  t2 = t4;
224  }
225  /* Sum up the four partial sums, and put the result into s. */
226  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
227  sumdiffs = vec_splat(sumdiffs, 3);
228  vec_ste(sumdiffs, 0, &s);
229 
230  return s;
231 }
232 
233 static int sad16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
234  ptrdiff_t stride, int h)
235 {
236  int i;
237  int __attribute__((aligned(16))) s;
238  const vector unsigned int zero =
239  (const vector unsigned int) vec_splat_u32(0);
240  vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
241  vector signed int sumdiffs;
242 
243  for (i = 0; i < h; i++) {
244  /* Read potentially unaligned pixels into t1 and t2. */
245  vector unsigned char t1 =vec_ld(0, pix1);
246  vector unsigned char t2 = VEC_LD(0, pix2);
247 
248  /* Calculate a sum of abs differences vector. */
249  vector unsigned char t3 = vec_max(t1, t2);
250  vector unsigned char t4 = vec_min(t1, t2);
251  vector unsigned char t5 = vec_sub(t3, t4);
252 
253  /* Add each 4 pixel group together and put 4 results into sad. */
254  sad = vec_sum4s(t5, sad);
255 
256  pix1 += stride;
257  pix2 += stride;
258  }
259 
260  /* Sum up the four partial sums, and put the result into s. */
261  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
262  sumdiffs = vec_splat(sumdiffs, 3);
263  vec_ste(sumdiffs, 0, &s);
264 
265  return s;
266 }
267 
268 static int sad8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
269  ptrdiff_t stride, int h)
270 {
271  int i;
272  int __attribute__((aligned(16))) s;
273  const vector unsigned int zero =
274  (const vector unsigned int) vec_splat_u32(0);
275  const vector unsigned char permclear =
276  (vector unsigned char)
277  { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };
278  vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
279  vector signed int sumdiffs;
280 
281  for (i = 0; i < h; i++) {
282  /* Read potentially unaligned pixels into t1 and t2.
283  * Since we're reading 16 pixels, and actually only want 8,
284  * mask out the last 8 pixels. The 0s don't change the sum. */
285  vector unsigned char pix1l = VEC_LD(0, pix1);
286  vector unsigned char pix2l = VEC_LD(0, pix2);
287  vector unsigned char t1 = vec_and(pix1l, permclear);
288  vector unsigned char t2 = vec_and(pix2l, permclear);
289 
290  /* Calculate a sum of abs differences vector. */
291  vector unsigned char t3 = vec_max(t1, t2);
292  vector unsigned char t4 = vec_min(t1, t2);
293  vector unsigned char t5 = vec_sub(t3, t4);
294 
295  /* Add each 4 pixel group together and put 4 results into sad. */
296  sad = vec_sum4s(t5, sad);
297 
298  pix1 += stride;
299  pix2 += stride;
300  }
301 
302  /* Sum up the four partial sums, and put the result into s. */
303  sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
304  sumdiffs = vec_splat(sumdiffs, 3);
305  vec_ste(sumdiffs, 0, &s);
306 
307  return s;
308 }
309 
310 /* Sum of Squared Errors for an 8x8 block, AltiVec-enhanced.
311  * It's the sad8_altivec code above w/ squaring added. */
312 static int sse8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
313  ptrdiff_t stride, int h)
314 {
315  int i;
316  int __attribute__((aligned(16))) s;
317  const vector unsigned int zero =
318  (const vector unsigned int) vec_splat_u32(0);
319  const vector unsigned char permclear =
320  (vector unsigned char)
321  { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };
322  vector unsigned int sum = (vector unsigned int) vec_splat_u32(0);
323  vector signed int sumsqr;
324 
325  for (i = 0; i < h; i++) {
326  /* Read potentially unaligned pixels into t1 and t2.
327  * Since we're reading 16 pixels, and actually only want 8,
328  * mask out the last 8 pixels. The 0s don't change the sum. */
329  vector unsigned char t1 = vec_and(VEC_LD(0, pix1), permclear);
330  vector unsigned char t2 = vec_and(VEC_LD(0, pix2), permclear);
331 
332  /* Since we want to use unsigned chars, we can take advantage
333  * of the fact that abs(a - b) ^ 2 = (a - b) ^ 2. */
334 
335  /* Calculate abs differences vector. */
336  vector unsigned char t3 = vec_max(t1, t2);
337  vector unsigned char t4 = vec_min(t1, t2);
338  vector unsigned char t5 = vec_sub(t3, t4);
339 
340  /* Square the values and add them to our sum. */
341  sum = vec_msum(t5, t5, sum);
342 
343  pix1 += stride;
344  pix2 += stride;
345  }
346 
347  /* Sum up the four partial sums, and put the result into s. */
348  sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
349  sumsqr = vec_splat(sumsqr, 3);
350  vec_ste(sumsqr, 0, &s);
351 
352  return s;
353 }
354 
355 /* Sum of Squared Errors for a 16x16 block, AltiVec-enhanced.
356  * It's the sad16_altivec code above w/ squaring added. */
357 static int sse16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
358  ptrdiff_t stride, int h)
359 {
360  int i;
361  int __attribute__((aligned(16))) s;
362  const vector unsigned int zero =
363  (const vector unsigned int) vec_splat_u32(0);
364  vector unsigned int sum = (vector unsigned int) vec_splat_u32(0);
365  vector signed int sumsqr;
366 
367  for (i = 0; i < h; i++) {
368  /* Read potentially unaligned pixels into t1 and t2. */
369  vector unsigned char t1 = vec_ld(0, pix1);
370  vector unsigned char t2 = VEC_LD(0, pix2);
371 
372  /* Since we want to use unsigned chars, we can take advantage
373  * of the fact that abs(a - b) ^ 2 = (a - b) ^ 2. */
374 
375  /* Calculate abs differences vector. */
376  vector unsigned char t3 = vec_max(t1, t2);
377  vector unsigned char t4 = vec_min(t1, t2);
378  vector unsigned char t5 = vec_sub(t3, t4);
379 
380  /* Square the values and add them to our sum. */
381  sum = vec_msum(t5, t5, sum);
382 
383  pix1 += stride;
384  pix2 += stride;
385  }
386 
387  /* Sum up the four partial sums, and put the result into s. */
388  sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
389  sumsqr = vec_splat(sumsqr, 3);
390 
391  vec_ste(sumsqr, 0, &s);
392  return s;
393 }
394 
395 static int hadamard8_diff8x8_altivec(MpegEncContext *s, uint8_t *dst,
396  uint8_t *src, ptrdiff_t stride, int h)
397 {
398  int __attribute__((aligned(16))) sum;
399  register const vector unsigned char vzero =
400  (const vector unsigned char) vec_splat_u8(0);
401  register vector signed short temp0, temp1, temp2, temp3, temp4,
402  temp5, temp6, temp7;
403  {
404  register const vector signed short vprod1 =
405  (const vector signed short) { 1, -1, 1, -1, 1, -1, 1, -1 };
406  register const vector signed short vprod2 =
407  (const vector signed short) { 1, 1, -1, -1, 1, 1, -1, -1 };
408  register const vector signed short vprod3 =
409  (const vector signed short) { 1, 1, 1, 1, -1, -1, -1, -1 };
410  register const vector unsigned char perm1 =
411  (const vector unsigned char)
412  { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
413  0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };
414  register const vector unsigned char perm2 =
415  (const vector unsigned char)
416  { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
417  0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };
418  register const vector unsigned char perm3 =
419  (const vector unsigned char)
420  { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
421  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
422 
423 
424 #define ONEITERBUTTERFLY(i, res) \
425  { \
426  register vector unsigned char srcO = unaligned_load(stride * i, src); \
427  register vector unsigned char dstO = unaligned_load(stride * i, dst);\
428  \
429  /* Promote the unsigned chars to signed shorts. */ \
430  /* We're in the 8x8 function, we only care for the first 8. */ \
431  register vector signed short srcV = \
432  (vector signed short) VEC_MERGEH((vector signed char) vzero, \
433  (vector signed char) srcO); \
434  register vector signed short dstV = \
435  (vector signed short) VEC_MERGEH((vector signed char) vzero, \
436  (vector signed char) dstO); \
437  \
438  /* subtractions inside the first butterfly */ \
439  register vector signed short but0 = vec_sub(srcV, dstV); \
440  register vector signed short op1 = vec_perm(but0, but0, perm1); \
441  register vector signed short but1 = vec_mladd(but0, vprod1, op1); \
442  register vector signed short op2 = vec_perm(but1, but1, perm2); \
443  register vector signed short but2 = vec_mladd(but1, vprod2, op2); \
444  register vector signed short op3 = vec_perm(but2, but2, perm3); \
445  res = vec_mladd(but2, vprod3, op3); \
446  }
447 
448  ONEITERBUTTERFLY(0, temp0);
449  ONEITERBUTTERFLY(1, temp1);
450  ONEITERBUTTERFLY(2, temp2);
451  ONEITERBUTTERFLY(3, temp3);
452  ONEITERBUTTERFLY(4, temp4);
453  ONEITERBUTTERFLY(5, temp5);
454  ONEITERBUTTERFLY(6, temp6);
455  ONEITERBUTTERFLY(7, temp7);
456  }
457 #undef ONEITERBUTTERFLY
458  {
459  register vector signed int vsum;
460  register vector signed short line0 = vec_add(temp0, temp1);
461  register vector signed short line1 = vec_sub(temp0, temp1);
462  register vector signed short line2 = vec_add(temp2, temp3);
463  register vector signed short line3 = vec_sub(temp2, temp3);
464  register vector signed short line4 = vec_add(temp4, temp5);
465  register vector signed short line5 = vec_sub(temp4, temp5);
466  register vector signed short line6 = vec_add(temp6, temp7);
467  register vector signed short line7 = vec_sub(temp6, temp7);
468 
469  register vector signed short line0B = vec_add(line0, line2);
470  register vector signed short line2B = vec_sub(line0, line2);
471  register vector signed short line1B = vec_add(line1, line3);
472  register vector signed short line3B = vec_sub(line1, line3);
473  register vector signed short line4B = vec_add(line4, line6);
474  register vector signed short line6B = vec_sub(line4, line6);
475  register vector signed short line5B = vec_add(line5, line7);
476  register vector signed short line7B = vec_sub(line5, line7);
477 
478  register vector signed short line0C = vec_add(line0B, line4B);
479  register vector signed short line4C = vec_sub(line0B, line4B);
480  register vector signed short line1C = vec_add(line1B, line5B);
481  register vector signed short line5C = vec_sub(line1B, line5B);
482  register vector signed short line2C = vec_add(line2B, line6B);
483  register vector signed short line6C = vec_sub(line2B, line6B);
484  register vector signed short line3C = vec_add(line3B, line7B);
485  register vector signed short line7C = vec_sub(line3B, line7B);
486 
487  vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
488  vsum = vec_sum4s(vec_abs(line1C), vsum);
489  vsum = vec_sum4s(vec_abs(line2C), vsum);
490  vsum = vec_sum4s(vec_abs(line3C), vsum);
491  vsum = vec_sum4s(vec_abs(line4C), vsum);
492  vsum = vec_sum4s(vec_abs(line5C), vsum);
493  vsum = vec_sum4s(vec_abs(line6C), vsum);
494  vsum = vec_sum4s(vec_abs(line7C), vsum);
495  vsum = vec_sums(vsum, (vector signed int) vzero);
496  vsum = vec_splat(vsum, 3);
497 
498  vec_ste(vsum, 0, &sum);
499  }
500  return sum;
501 }
502 
503 /*
504  * 16x8 works with 16 elements; it can avoid replicating loads, and
505  * gives the compiler more room for scheduling. It's only used from
506  * inside hadamard8_diff16_altivec.
507  *
508  * Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has
509  * a LOT of spill code, it seems gcc (unlike xlc) cannot keep everything in
510  * registers by itself. The following code includes hand-made register
511  * allocation. It's not clean, but on a 7450 the resulting code is much faster
512  * (best case falls from 700+ cycles to 550).
513  *
514  * xlc doesn't add spill code, but it doesn't know how to schedule for the
515  * 7450, and its code isn't much faster than gcc-3.3 on the 7450 (but uses
516  * 25% fewer instructions...)
517  *
518  * On the 970, the hand-made RA is still a win (around 690 vs. around 780),
519  * but xlc goes to around 660 on the regular C code...
520  */
521 static int hadamard8_diff16x8_altivec(MpegEncContext *s, uint8_t *dst,
522  uint8_t *src, ptrdiff_t stride, int h)
523 {
524  int __attribute__((aligned(16))) sum;
525  register vector signed short
526  temp0 __asm__ ("v0"),
527  temp1 __asm__ ("v1"),
528  temp2 __asm__ ("v2"),
529  temp3 __asm__ ("v3"),
530  temp4 __asm__ ("v4"),
531  temp5 __asm__ ("v5"),
532  temp6 __asm__ ("v6"),
533  temp7 __asm__ ("v7");
534  register vector signed short
535  temp0S __asm__ ("v8"),
536  temp1S __asm__ ("v9"),
537  temp2S __asm__ ("v10"),
538  temp3S __asm__ ("v11"),
539  temp4S __asm__ ("v12"),
540  temp5S __asm__ ("v13"),
541  temp6S __asm__ ("v14"),
542  temp7S __asm__ ("v15");
543  register const vector unsigned char vzero __asm__ ("v31") =
544  (const vector unsigned char) vec_splat_u8(0);
545  {
546  register const vector signed short vprod1 __asm__ ("v16") =
547  (const vector signed short) { 1, -1, 1, -1, 1, -1, 1, -1 };
548 
549  register const vector signed short vprod2 __asm__ ("v17") =
550  (const vector signed short) { 1, 1, -1, -1, 1, 1, -1, -1 };
551 
552  register const vector signed short vprod3 __asm__ ("v18") =
553  (const vector signed short) { 1, 1, 1, 1, -1, -1, -1, -1 };
554 
555  register const vector unsigned char perm1 __asm__ ("v19") =
556  (const vector unsigned char)
557  { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
558  0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };
559 
560  register const vector unsigned char perm2 __asm__ ("v20") =
561  (const vector unsigned char)
562  { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
563  0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };
564 
565  register const vector unsigned char perm3 __asm__ ("v21") =
566  (const vector unsigned char)
567  { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
568  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
569 
570 #define ONEITERBUTTERFLY(i, res1, res2) \
571  { \
572  register vector unsigned char srcO __asm__ ("v22") = \
573  unaligned_load(stride * i, src); \
574  register vector unsigned char dstO __asm__ ("v23") = \
575  unaligned_load(stride * i, dst);\
576  \
577  /* Promote the unsigned chars to signed shorts. */ \
578  register vector signed short srcV __asm__ ("v24") = \
579  (vector signed short) VEC_MERGEH((vector signed char) vzero, \
580  (vector signed char) srcO); \
581  register vector signed short dstV __asm__ ("v25") = \
582  (vector signed short) VEC_MERGEH((vector signed char) vzero, \
583  (vector signed char) dstO); \
584  register vector signed short srcW __asm__ ("v26") = \
585  (vector signed short) VEC_MERGEL((vector signed char) vzero, \
586  (vector signed char) srcO); \
587  register vector signed short dstW __asm__ ("v27") = \
588  (vector signed short) VEC_MERGEL((vector signed char) vzero, \
589  (vector signed char) dstO); \
590  \
591  /* subtractions inside the first butterfly */ \
592  register vector signed short but0 __asm__ ("v28") = \
593  vec_sub(srcV, dstV); \
594  register vector signed short but0S __asm__ ("v29") = \
595  vec_sub(srcW, dstW); \
596  register vector signed short op1 __asm__ ("v30") = \
597  vec_perm(but0, but0, perm1); \
598  register vector signed short but1 __asm__ ("v22") = \
599  vec_mladd(but0, vprod1, op1); \
600  register vector signed short op1S __asm__ ("v23") = \
601  vec_perm(but0S, but0S, perm1); \
602  register vector signed short but1S __asm__ ("v24") = \
603  vec_mladd(but0S, vprod1, op1S); \
604  register vector signed short op2 __asm__ ("v25") = \
605  vec_perm(but1, but1, perm2); \
606  register vector signed short but2 __asm__ ("v26") = \
607  vec_mladd(but1, vprod2, op2); \
608  register vector signed short op2S __asm__ ("v27") = \
609  vec_perm(but1S, but1S, perm2); \
610  register vector signed short but2S __asm__ ("v28") = \
611  vec_mladd(but1S, vprod2, op2S); \
612  register vector signed short op3 __asm__ ("v29") = \
613  vec_perm(but2, but2, perm3); \
614  register vector signed short op3S __asm__ ("v30") = \
615  vec_perm(but2S, but2S, perm3); \
616  res1 = vec_mladd(but2, vprod3, op3); \
617  res2 = vec_mladd(but2S, vprod3, op3S); \
618  }
619 
620  ONEITERBUTTERFLY(0, temp0, temp0S);
621  ONEITERBUTTERFLY(1, temp1, temp1S);
622  ONEITERBUTTERFLY(2, temp2, temp2S);
623  ONEITERBUTTERFLY(3, temp3, temp3S);
624  ONEITERBUTTERFLY(4, temp4, temp4S);
625  ONEITERBUTTERFLY(5, temp5, temp5S);
626  ONEITERBUTTERFLY(6, temp6, temp6S);
627  ONEITERBUTTERFLY(7, temp7, temp7S);
628  }
629 #undef ONEITERBUTTERFLY
630  {
631  register vector signed int vsum;
632 
633  register vector signed short line0 = vec_add(temp0, temp1);
634  register vector signed short line1 = vec_sub(temp0, temp1);
635  register vector signed short line2 = vec_add(temp2, temp3);
636  register vector signed short line3 = vec_sub(temp2, temp3);
637  register vector signed short line4 = vec_add(temp4, temp5);
638  register vector signed short line5 = vec_sub(temp4, temp5);
639  register vector signed short line6 = vec_add(temp6, temp7);
640  register vector signed short line7 = vec_sub(temp6, temp7);
641 
642  register vector signed short line0B = vec_add(line0, line2);
643  register vector signed short line2B = vec_sub(line0, line2);
644  register vector signed short line1B = vec_add(line1, line3);
645  register vector signed short line3B = vec_sub(line1, line3);
646  register vector signed short line4B = vec_add(line4, line6);
647  register vector signed short line6B = vec_sub(line4, line6);
648  register vector signed short line5B = vec_add(line5, line7);
649  register vector signed short line7B = vec_sub(line5, line7);
650 
651  register vector signed short line0C = vec_add(line0B, line4B);
652  register vector signed short line4C = vec_sub(line0B, line4B);
653  register vector signed short line1C = vec_add(line1B, line5B);
654  register vector signed short line5C = vec_sub(line1B, line5B);
655  register vector signed short line2C = vec_add(line2B, line6B);
656  register vector signed short line6C = vec_sub(line2B, line6B);
657  register vector signed short line3C = vec_add(line3B, line7B);
658  register vector signed short line7C = vec_sub(line3B, line7B);
659 
660  register vector signed short line0S = vec_add(temp0S, temp1S);
661  register vector signed short line1S = vec_sub(temp0S, temp1S);
662  register vector signed short line2S = vec_add(temp2S, temp3S);
663  register vector signed short line3S = vec_sub(temp2S, temp3S);
664  register vector signed short line4S = vec_add(temp4S, temp5S);
665  register vector signed short line5S = vec_sub(temp4S, temp5S);
666  register vector signed short line6S = vec_add(temp6S, temp7S);
667  register vector signed short line7S = vec_sub(temp6S, temp7S);
668 
669  register vector signed short line0BS = vec_add(line0S, line2S);
670  register vector signed short line2BS = vec_sub(line0S, line2S);
671  register vector signed short line1BS = vec_add(line1S, line3S);
672  register vector signed short line3BS = vec_sub(line1S, line3S);
673  register vector signed short line4BS = vec_add(line4S, line6S);
674  register vector signed short line6BS = vec_sub(line4S, line6S);
675  register vector signed short line5BS = vec_add(line5S, line7S);
676  register vector signed short line7BS = vec_sub(line5S, line7S);
677 
678  register vector signed short line0CS = vec_add(line0BS, line4BS);
679  register vector signed short line4CS = vec_sub(line0BS, line4BS);
680  register vector signed short line1CS = vec_add(line1BS, line5BS);
681  register vector signed short line5CS = vec_sub(line1BS, line5BS);
682  register vector signed short line2CS = vec_add(line2BS, line6BS);
683  register vector signed short line6CS = vec_sub(line2BS, line6BS);
684  register vector signed short line3CS = vec_add(line3BS, line7BS);
685  register vector signed short line7CS = vec_sub(line3BS, line7BS);
686 
687  vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
688  vsum = vec_sum4s(vec_abs(line1C), vsum);
689  vsum = vec_sum4s(vec_abs(line2C), vsum);
690  vsum = vec_sum4s(vec_abs(line3C), vsum);
691  vsum = vec_sum4s(vec_abs(line4C), vsum);
692  vsum = vec_sum4s(vec_abs(line5C), vsum);
693  vsum = vec_sum4s(vec_abs(line6C), vsum);
694  vsum = vec_sum4s(vec_abs(line7C), vsum);
695 
696  vsum = vec_sum4s(vec_abs(line0CS), vsum);
697  vsum = vec_sum4s(vec_abs(line1CS), vsum);
698  vsum = vec_sum4s(vec_abs(line2CS), vsum);
699  vsum = vec_sum4s(vec_abs(line3CS), vsum);
700  vsum = vec_sum4s(vec_abs(line4CS), vsum);
701  vsum = vec_sum4s(vec_abs(line5CS), vsum);
702  vsum = vec_sum4s(vec_abs(line6CS), vsum);
703  vsum = vec_sum4s(vec_abs(line7CS), vsum);
704  vsum = vec_sums(vsum, (vector signed int) vzero);
705  vsum = vec_splat(vsum, 3);
706 
707  vec_ste(vsum, 0, &sum);
708  }
709  return sum;
710 }
711 
712 static int hadamard8_diff16_altivec(MpegEncContext *s, uint8_t *dst,
713  uint8_t *src, ptrdiff_t stride, int h)
714 {
715  int score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
716 
717  if (h == 16) {
718  dst += 8 * stride;
719  src += 8 * stride;
720  score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
721  }
722  return score;
723 }
724 #endif /* HAVE_ALTIVEC */
725 
726 av_cold void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)
727 {
728 #if HAVE_ALTIVEC
729  if (!PPC_ALTIVEC(av_get_cpu_flags()))
730  return;
731 
732  c->pix_abs[0][1] = sad16_x2_altivec;
733  c->pix_abs[0][2] = sad16_y2_altivec;
734  c->pix_abs[0][3] = sad16_xy2_altivec;
735  c->pix_abs[0][0] = sad16_altivec;
736  c->pix_abs[1][0] = sad8_altivec;
737 
738  c->sad[0] = sad16_altivec;
739  c->sad[1] = sad8_altivec;
740  c->sse[0] = sse16_altivec;
741  c->sse[1] = sse8_altivec;
742 
743  c->hadamard8_diff[0] = hadamard8_diff16_altivec;
744  c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
745 #endif /* HAVE_ALTIVEC */
746 }
ff_me_cmp_init_ppc
av_cold void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:726
h
h
Definition: vp9dsp_template.c:2038
mpegvideo.h
mpegvideo header.
v0
GLfloat v0
Definition: opengl_enc.c:107
src
#define src
Definition: vp8dsp.c:254
attributes.h
Macro definitions for various function/variable attributes.
MECmpContext::hadamard8_diff
me_cmp_func hadamard8_diff[6]
Definition: me_cmp.h:58
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
aligned
static int aligned(int val)
Definition: dashdec.c:165
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition: cpu.h:25
t1
#define t1
Definition: regdef.h:29
zero
#define zero
Definition: regdef.h:64
MECmpContext::pix_abs
me_cmp_func pix_abs[2][4]
Definition: me_cmp.h:78
t3
#define t3
Definition: regdef.h:31
s
#define s(width, name)
Definition: cbs_vp9.c:257
me_cmp.h
avcodec.h
Libavcodec external API header.
AVCodecContext
main external API structure.
Definition: avcodec.h:1519
t5
#define t5
Definition: regdef.h:33
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
util_altivec.h
Contains misc utility macros and inline functions.
MECmpContext::sad
me_cmp_func sad[6]
Definition: me_cmp.h:56
MECmpContext::sse
me_cmp_func sse[6]
Definition: me_cmp.h:57
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:81
int
int
Definition: ffmpeg_filter.c:191
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
t4
#define t4
Definition: regdef.h:32
stride
#define stride
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
t2
#define t2
Definition: regdef.h:30
Generated on Tue Jun 19 2018 19:21:20 for FFmpeg by   doxygen 1.8.6