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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / ppc / me_cmp.c
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2ba45a60
DM		 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
28#include "libavutil/attributes.h"
29#include "libavutil/cpu.h"
30#include "libavutil/ppc/cpu.h"
31#include "libavutil/ppc/types_altivec.h"
32#include "libavutil/ppc/util_altivec.h"
33#include "libavcodec/avcodec.h"
34#include "libavcodec/mpegvideo.h"
35#include "libavcodec/me_cmp.h"
36
37#if HAVE_ALTIVEC
38static int sad16_x2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
39 int line_size, int h)
40{
41 int i, s = 0;
42 const vector unsigned char zero =
43 (const vector unsigned char) vec_splat_u8(0);
44 vector unsigned char perm1 = vec_lvsl(0, pix2);
45 vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
46 vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
47 vector signed int sumdiffs;
48
49 for (i = 0; i < h; i++) {
50 /* Read unaligned pixels into our vectors. The vectors are as follows:
51 * pix1v: pix1[0] - pix1[15]
52 * pix2v: pix2[0] - pix2[15] pix2iv: pix2[1] - pix2[16] */
53 vector unsigned char pix1v = vec_ld(0, pix1);
54 vector unsigned char pix2l = vec_ld(0, pix2);
55 vector unsigned char pix2r = vec_ld(16, pix2);
56 vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm1);
57 vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);
58
59 /* Calculate the average vector. */
60 vector unsigned char avgv = vec_avg(pix2v, pix2iv);
61
62 /* Calculate a sum of abs differences vector. */
63 vector unsigned char t5 = vec_sub(vec_max(pix1v, avgv),
64 vec_min(pix1v, avgv));
65
66 /* Add each 4 pixel group together and put 4 results into sad. */
67 sad = vec_sum4s(t5, sad);
68
69 pix1 += line_size;
70 pix2 += line_size;
71 }
72 /* Sum up the four partial sums, and put the result into s. */
73 sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
74 sumdiffs = vec_splat(sumdiffs, 3);
75 vec_ste(sumdiffs, 0, &s);
76
77 return s;
78}
79
80static int sad16_y2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
81 int line_size, int h)
82{
83 int i, s = 0;
84 const vector unsigned char zero =
85 (const vector unsigned char) vec_splat_u8(0);
86 vector unsigned char perm = vec_lvsl(0, pix2);
87 vector unsigned char pix1v, pix3v, avgv, t5;
88 vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
89 vector signed int sumdiffs;
90 uint8_t *pix3 = pix2 + line_size;
91
92 /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
93 * iteration becomes pix2 in the next iteration. We can use this
94 * fact to avoid a potentially expensive unaligned read, each
95 * time around the loop.
96 * Read unaligned pixels into our vectors. The vectors are as follows:
97 * pix2v: pix2[0] - pix2[15]
98 * Split the pixel vectors into shorts. */
99 vector unsigned char pix2l = vec_ld(0, pix2);
100 vector unsigned char pix2r = vec_ld(15, pix2);
101 vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm);
102
103 for (i = 0; i < h; i++) {
104 /* Read unaligned pixels into our vectors. The vectors are as follows:
105 * pix1v: pix1[0] - pix1[15]
106 * pix3v: pix3[0] - pix3[15] */
107 pix1v = vec_ld(0, pix1);
108
109 pix2l = vec_ld(0, pix3);
110 pix2r = vec_ld(15, pix3);
111 pix3v = vec_perm(pix2l, pix2r, perm);
112
113 /* Calculate the average vector. */
114 avgv = vec_avg(pix2v, pix3v);
115
116 /* Calculate a sum of abs differences vector. */
117 t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
118
119 /* Add each 4 pixel group together and put 4 results into sad. */
120 sad = vec_sum4s(t5, sad);
121
122 pix1 += line_size;
123 pix2v = pix3v;
124 pix3 += line_size;
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
134static int sad16_xy2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
135 int line_size, int h)
136{
137 int i, s = 0;
138 uint8_t *pix3 = pix2 + line_size;
139 const vector unsigned char zero =
140 (const vector unsigned char) vec_splat_u8(0);
141 const vector unsigned short two =
142 (const vector unsigned short) vec_splat_u16(2);
143 vector unsigned char avgv, t5;
144 vector unsigned char perm1 = vec_lvsl(0, pix2);
145 vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
146 vector unsigned char pix1v, pix3v, pix3iv;
147 vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
148 vector unsigned short avghv, avglv;
149 vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
150 vector signed int sumdiffs;
151
152 /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
153 * iteration becomes pix2 in the next iteration. We can use this
154 * fact to avoid a potentially expensive unaligned read, as well
155 * as some splitting, and vector addition each time around the loop.
156 * Read unaligned pixels into our vectors. The vectors are as follows:
157 * pix2v: pix2[0] - pix2[15] pix2iv: pix2[1] - pix2[16]
158 * Split the pixel vectors into shorts. */
159 vector unsigned char pix2l = vec_ld(0, pix2);
160 vector unsigned char pix2r = vec_ld(16, pix2);
161 vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm1);
162 vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);
163
164 vector unsigned short pix2hv =
165 (vector unsigned short) vec_mergeh(zero, pix2v);
166 vector unsigned short pix2lv =
167 (vector unsigned short) vec_mergel(zero, pix2v);
168 vector unsigned short pix2ihv =
169 (vector unsigned short) vec_mergeh(zero, pix2iv);
170 vector unsigned short pix2ilv =
171 (vector unsigned short) vec_mergel(zero, pix2iv);
172 vector unsigned short t1 = vec_add(pix2hv, pix2ihv);
173 vector unsigned short t2 = vec_add(pix2lv, pix2ilv);
174 vector unsigned short t3, t4;
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
189 * rounding would mean that, for example, avg(3, 0, 0, 1) = 2, when
190 * it should be 1. Instead, we have to split the pixel vectors into
191 * vectors of shorts 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
229static int sad16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
230 int line_size, int h)
231{
232 int i, s;
233 const vector unsigned int zero =
234 (const vector unsigned int) vec_splat_u32(0);
235 vector unsigned char perm = vec_lvsl(0, pix2);
236 vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
237 vector signed int sumdiffs;
238
239 for (i = 0; i < h; i++) {
240 /* Read potentially unaligned pixels into t1 and t2. */
241 vector unsigned char pix2l = vec_ld(0, pix2);
242 vector unsigned char pix2r = vec_ld(15, pix2);
243 vector unsigned char t1 = vec_ld(0, pix1);
244 vector unsigned char t2 = vec_perm(pix2l, pix2r, perm);
245
246 /* Calculate a sum of abs differences vector. */
247 vector unsigned char t3 = vec_max(t1, t2);
248 vector unsigned char t4 = vec_min(t1, t2);
249 vector unsigned char t5 = vec_sub(t3, t4);
250
251 /* Add each 4 pixel group together and put 4 results into sad. */
252 sad = vec_sum4s(t5, sad);
253
254 pix1 += line_size;
255 pix2 += line_size;
256 }
257
258 /* Sum up the four partial sums, and put the result into s. */
259 sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
260 sumdiffs = vec_splat(sumdiffs, 3);
261 vec_ste(sumdiffs, 0, &s);
262
263 return s;
264}
265
266static int sad8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
267 int line_size, int h)
268{
269 int i, s;
270 const vector unsigned int zero =
271 (const vector unsigned int) vec_splat_u32(0);
272 const vector unsigned char permclear =
273 (vector unsigned char)
274 { 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 int sad = (vector unsigned int) vec_splat_u32(0);
278 vector signed int sumdiffs;
279
280 for (i = 0; i < h; i++) {
281 /* Read potentially unaligned pixels into t1 and t2.
282 * Since we're reading 16 pixels, and actually only want 8,
283 * mask out the last 8 pixels. The 0s don't change the sum. */
284 vector unsigned char pix1l = vec_ld(0, pix1);
285 vector unsigned char pix1r = vec_ld(7, pix1);
286 vector unsigned char pix2l = vec_ld(0, pix2);
287 vector unsigned char pix2r = vec_ld(7, pix2);
288 vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),
289 permclear);
290 vector unsigned char t2 = vec_and(vec_perm(pix2l, pix2r, perm2),
291 permclear);
292
293 /* Calculate a sum of abs differences vector. */
294 vector unsigned char t3 = vec_max(t1, t2);
295 vector unsigned char t4 = vec_min(t1, t2);
296 vector unsigned char t5 = vec_sub(t3, t4);
297
298 /* Add each 4 pixel group together and put 4 results into sad. */
299 sad = vec_sum4s(t5, sad);
300
301 pix1 += line_size;
302 pix2 += line_size;
303 }
304
305 /* Sum up the four partial sums, and put the result into s. */
306 sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
307 sumdiffs = vec_splat(sumdiffs, 3);
308 vec_ste(sumdiffs, 0, &s);
309
310 return s;
311}
312
313/* Sum of Squared Errors for an 8x8 block, AltiVec-enhanced.
314 * It's the sad8_altivec code above w/ squaring added. */
315static int sse8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
316 int line_size, int h)
317{
318 int i, s;
319 const vector unsigned int zero =
320 (const vector unsigned int) vec_splat_u32(0);
321 const vector unsigned char permclear =
322 (vector unsigned char)
323 { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };
324 vector unsigned char perm1 = vec_lvsl(0, pix1);
325 vector unsigned char perm2 = vec_lvsl(0, pix2);
326 vector unsigned int sum = (vector unsigned int) vec_splat_u32(0);
327 vector signed int sumsqr;
328
329 for (i = 0; i < h; i++) {
330 /* Read potentially unaligned pixels into t1 and t2.
331 * Since we're reading 16 pixels, and actually only want 8,
332 * mask out the last 8 pixels. The 0s don't change the sum. */
333 vector unsigned char pix1l = vec_ld(0, pix1);
334 vector unsigned char pix1r = vec_ld(7, pix1);
335 vector unsigned char pix2l = vec_ld(0, pix2);
336 vector unsigned char pix2r = vec_ld(7, pix2);
337 vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),
338 permclear);
339 vector unsigned char t2 = vec_and(vec_perm(pix2l, pix2r, perm2),
340 permclear);
341
342 /* Since we want to use unsigned chars, we can take advantage
343 * of the fact that abs(a - b) ^ 2 = (a - b) ^ 2. */
344
345 /* Calculate abs differences vector. */
346 vector unsigned char t3 = vec_max(t1, t2);
347 vector unsigned char t4 = vec_min(t1, t2);
348 vector unsigned char t5 = vec_sub(t3, t4);
349
350 /* Square the values and add them to our sum. */
351 sum = vec_msum(t5, t5, sum);
352
353 pix1 += line_size;
354 pix2 += line_size;
355 }
356
357 /* Sum up the four partial sums, and put the result into s. */
358 sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
359 sumsqr = vec_splat(sumsqr, 3);
360 vec_ste(sumsqr, 0, &s);
361
362 return s;
363}
364
365/* Sum of Squared Errors for a 16x16 block, AltiVec-enhanced.
366 * It's the sad16_altivec code above w/ squaring added. */
367static int sse16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
368 int line_size, int h)
369{
370 int i, s;
371 const vector unsigned int zero =
372 (const vector unsigned int) vec_splat_u32(0);
373 vector unsigned char perm = vec_lvsl(0, pix2);
374 vector unsigned int sum = (vector unsigned int) vec_splat_u32(0);
375 vector signed int sumsqr;
376
377 for (i = 0; i < h; i++) {
378 /* Read potentially unaligned pixels into t1 and t2. */
379 vector unsigned char pix2l = vec_ld(0, pix2);
380 vector unsigned char pix2r = vec_ld(15, pix2);
381 vector unsigned char t1 = vec_ld(0, pix1);
382 vector unsigned char t2 = vec_perm(pix2l, pix2r, perm);
383
384 /* Since we want to use unsigned chars, we can take advantage
385 * of the fact that abs(a - b) ^ 2 = (a - b) ^ 2. */
386
387 /* Calculate abs differences vector. */
388 vector unsigned char t3 = vec_max(t1, t2);
389 vector unsigned char t4 = vec_min(t1, t2);
390 vector unsigned char t5 = vec_sub(t3, t4);
391
392 /* Square the values and add them to our sum. */
393 sum = vec_msum(t5, t5, sum);
394
395 pix1 += line_size;
396 pix2 += line_size;
397 }
398
399 /* Sum up the four partial sums, and put the result into s. */
400 sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
401 sumsqr = vec_splat(sumsqr, 3);
402 vec_ste(sumsqr, 0, &s);
403
404 return s;
405}
406
407static int hadamard8_diff8x8_altivec(MpegEncContext *s, uint8_t *dst,
408 uint8_t *src, int stride, int h)
409{
410 int sum;
411 register const vector unsigned char vzero =
412 (const vector unsigned char) vec_splat_u8(0);
413 register vector signed short temp0, temp1, temp2, temp3, temp4,
414 temp5, temp6, temp7;
415 {
416 register const vector signed short vprod1 =
417 (const vector signed short) { 1, -1, 1, -1, 1, -1, 1, -1 };
418 register const vector signed short vprod2 =
419 (const vector signed short) { 1, 1, -1, -1, 1, 1, -1, -1 };
420 register const vector signed short vprod3 =
421 (const vector signed short) { 1, 1, 1, 1, -1, -1, -1, -1 };
422 register const vector unsigned char perm1 =
423 (const vector unsigned char)
424 { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
425 0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };
426 register const vector unsigned char perm2 =
427 (const vector unsigned char)
428 { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
429 0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };
430 register const vector unsigned char perm3 =
431 (const vector unsigned char)
432 { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
433 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
434
435#define ONEITERBUTTERFLY(i, res) \
436 { \
437 register vector unsigned char src1 = vec_ld(stride * i, src); \
438 register vector unsigned char src2 = vec_ld(stride * i + 15, src); \
439 register vector unsigned char srcO = \
440 vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
441 register vector unsigned char dst1 = vec_ld(stride * i, dst); \
442 register vector unsigned char dst2 = vec_ld(stride * i + 15, dst); \
443 register vector unsigned char dstO = \
444 vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
445 \
446 /* Promote the unsigned chars to signed shorts. */ \
447 /* We're in the 8x8 function, we only care for the first 8. */ \
448 register vector signed short srcV = \
449 (vector signed short) vec_mergeh((vector signed char) vzero, \
450 (vector signed char) srcO); \
451 register vector signed short dstV = \
452 (vector signed short) vec_mergeh((vector signed char) vzero, \
453 (vector signed char) dstO); \
454 \
455 /* subtractions inside the first butterfly */ \
456 register vector signed short but0 = vec_sub(srcV, dstV); \
457 register vector signed short op1 = vec_perm(but0, but0, perm1); \
458 register vector signed short but1 = vec_mladd(but0, vprod1, op1); \
459 register vector signed short op2 = vec_perm(but1, but1, perm2); \
460 register vector signed short but2 = vec_mladd(but1, vprod2, op2); \
461 register vector signed short op3 = vec_perm(but2, but2, perm3); \
462 res = vec_mladd(but2, vprod3, op3); \
463 }
464 ONEITERBUTTERFLY(0, temp0);
465 ONEITERBUTTERFLY(1, temp1);
466 ONEITERBUTTERFLY(2, temp2);
467 ONEITERBUTTERFLY(3, temp3);
468 ONEITERBUTTERFLY(4, temp4);
469 ONEITERBUTTERFLY(5, temp5);
470 ONEITERBUTTERFLY(6, temp6);
471 ONEITERBUTTERFLY(7, temp7);
472 }
473#undef ONEITERBUTTERFLY
474 {
475 register vector signed int vsum;
476 register vector signed short line0 = vec_add(temp0, temp1);
477 register vector signed short line1 = vec_sub(temp0, temp1);
478 register vector signed short line2 = vec_add(temp2, temp3);
479 register vector signed short line3 = vec_sub(temp2, temp3);
480 register vector signed short line4 = vec_add(temp4, temp5);
481 register vector signed short line5 = vec_sub(temp4, temp5);
482 register vector signed short line6 = vec_add(temp6, temp7);
483 register vector signed short line7 = vec_sub(temp6, temp7);
484
485 register vector signed short line0B = vec_add(line0, line2);
486 register vector signed short line2B = vec_sub(line0, line2);
487 register vector signed short line1B = vec_add(line1, line3);
488 register vector signed short line3B = vec_sub(line1, line3);
489 register vector signed short line4B = vec_add(line4, line6);
490 register vector signed short line6B = vec_sub(line4, line6);
491 register vector signed short line5B = vec_add(line5, line7);
492 register vector signed short line7B = vec_sub(line5, line7);
493
494 register vector signed short line0C = vec_add(line0B, line4B);
495 register vector signed short line4C = vec_sub(line0B, line4B);
496 register vector signed short line1C = vec_add(line1B, line5B);
497 register vector signed short line5C = vec_sub(line1B, line5B);
498 register vector signed short line2C = vec_add(line2B, line6B);
499 register vector signed short line6C = vec_sub(line2B, line6B);
500 register vector signed short line3C = vec_add(line3B, line7B);
501 register vector signed short line7C = vec_sub(line3B, line7B);
502
503 vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
504 vsum = vec_sum4s(vec_abs(line1C), vsum);
505 vsum = vec_sum4s(vec_abs(line2C), vsum);
506 vsum = vec_sum4s(vec_abs(line3C), vsum);
507 vsum = vec_sum4s(vec_abs(line4C), vsum);
508 vsum = vec_sum4s(vec_abs(line5C), vsum);
509 vsum = vec_sum4s(vec_abs(line6C), vsum);
510 vsum = vec_sum4s(vec_abs(line7C), vsum);
511 vsum = vec_sums(vsum, (vector signed int) vzero);
512 vsum = vec_splat(vsum, 3);
513 vec_ste(vsum, 0, &sum);
514 }
515 return sum;
516}
517
518/*
519 * 16x8 works with 16 elements; it allows to avoid replicating loads, and
520 * gives the compiler more room for scheduling. It's only used from
521 * inside hadamard8_diff16_altivec.
522 *
523 * Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has
524 * a LOT of spill code, it seems gcc (unlike xlc) cannot keep everything in
525 * registers by itself. The following code includes hand-made register
526 * allocation. It's not clean, but on a 7450 the resulting code is much faster
527 * (best case falls from 700+ cycles to 550).
528 *
529 * xlc doesn't add spill code, but it doesn't know how to schedule for the
530 * 7450, and its code isn't much faster than gcc-3.3 on the 7450 (but uses
531 * 25% fewer instructions...)
532 *
533 * On the 970, the hand-made RA is still a win (around 690 vs. around 780),
534 * but xlc goes to around 660 on the regular C code...
535 */
536static int hadamard8_diff16x8_altivec(MpegEncContext *s, uint8_t *dst,
537 uint8_t *src, int stride, int h)
538{
539 int sum;
540 register vector signed short
541 temp0 __asm__ ("v0"),
542 temp1 __asm__ ("v1"),
543 temp2 __asm__ ("v2"),
544 temp3 __asm__ ("v3"),
545 temp4 __asm__ ("v4"),
546 temp5 __asm__ ("v5"),
547 temp6 __asm__ ("v6"),
548 temp7 __asm__ ("v7");
549 register vector signed short
550 temp0S __asm__ ("v8"),
551 temp1S __asm__ ("v9"),
552 temp2S __asm__ ("v10"),
553 temp3S __asm__ ("v11"),
554 temp4S __asm__ ("v12"),
555 temp5S __asm__ ("v13"),
556 temp6S __asm__ ("v14"),
557 temp7S __asm__ ("v15");
558 register const vector unsigned char vzero __asm__ ("v31") =
559 (const vector unsigned char) vec_splat_u8(0);
560 {
561 register const vector signed short vprod1 __asm__ ("v16") =
562 (const vector signed short) { 1, -1, 1, -1, 1, -1, 1, -1 };
563
564 register const vector signed short vprod2 __asm__ ("v17") =
565 (const vector signed short) { 1, 1, -1, -1, 1, 1, -1, -1 };
566
567 register const vector signed short vprod3 __asm__ ("v18") =
568 (const vector signed short) { 1, 1, 1, 1, -1, -1, -1, -1 };
569
570 register const vector unsigned char perm1 __asm__ ("v19") =
571 (const vector unsigned char)
572 { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
573 0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };
574
575 register const vector unsigned char perm2 __asm__ ("v20") =
576 (const vector unsigned char)
577 { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
578 0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };
579
580 register const vector unsigned char perm3 __asm__ ("v21") =
581 (const vector unsigned char)
582 { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
583 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
584
585#define ONEITERBUTTERFLY(i, res1, res2) \
586 { \
587 register vector unsigned char src1 __asm__ ("v22") = \
588 vec_ld(stride * i, src); \
589 register vector unsigned char src2 __asm__ ("v23") = \
590 vec_ld(stride * i + 16, src); \
591 register vector unsigned char srcO __asm__ ("v22") = \
592 vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
593 register vector unsigned char dst1 __asm__ ("v24") = \
594 vec_ld(stride * i, dst); \
595 register vector unsigned char dst2 __asm__ ("v25") = \
596 vec_ld(stride * i + 16, dst); \
597 register vector unsigned char dstO __asm__ ("v23") = \
598 vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
599 \
600 /* Promote the unsigned chars to signed shorts. */ \
601 register vector signed short srcV __asm__ ("v24") = \
602 (vector signed short) vec_mergeh((vector signed char) vzero, \
603 (vector signed char) srcO); \
604 register vector signed short dstV __asm__ ("v25") = \
605 (vector signed short) vec_mergeh((vector signed char) vzero, \
606 (vector signed char) dstO); \
607 register vector signed short srcW __asm__ ("v26") = \
608 (vector signed short) vec_mergel((vector signed char) vzero, \
609 (vector signed char) srcO); \
610 register vector signed short dstW __asm__ ("v27") = \
611 (vector signed short) vec_mergel((vector signed char) vzero, \
612 (vector signed char) dstO); \
613 \
614 /* subtractions inside the first butterfly */ \
615 register vector signed short but0 __asm__ ("v28") = \
616 vec_sub(srcV, dstV); \
617 register vector signed short but0S __asm__ ("v29") = \
618 vec_sub(srcW, dstW); \
619 register vector signed short op1 __asm__ ("v30") = \
620 vec_perm(but0, but0, perm1); \
621 register vector signed short but1 __asm__ ("v22") = \
622 vec_mladd(but0, vprod1, op1); \
623 register vector signed short op1S __asm__ ("v23") = \
624 vec_perm(but0S, but0S, perm1); \
625 register vector signed short but1S __asm__ ("v24") = \
626 vec_mladd(but0S, vprod1, op1S); \
627 register vector signed short op2 __asm__ ("v25") = \
628 vec_perm(but1, but1, perm2); \
629 register vector signed short but2 __asm__ ("v26") = \
630 vec_mladd(but1, vprod2, op2); \
631 register vector signed short op2S __asm__ ("v27") = \
632 vec_perm(but1S, but1S, perm2); \
633 register vector signed short but2S __asm__ ("v28") = \
634 vec_mladd(but1S, vprod2, op2S); \
635 register vector signed short op3 __asm__ ("v29") = \
636 vec_perm(but2, but2, perm3); \
637 register vector signed short op3S __asm__ ("v30") = \
638 vec_perm(but2S, but2S, perm3); \
639 res1 = vec_mladd(but2, vprod3, op3); \
640 res2 = vec_mladd(but2S, vprod3, op3S); \
641 }
642 ONEITERBUTTERFLY(0, temp0, temp0S);
643 ONEITERBUTTERFLY(1, temp1, temp1S);
644 ONEITERBUTTERFLY(2, temp2, temp2S);
645 ONEITERBUTTERFLY(3, temp3, temp3S);
646 ONEITERBUTTERFLY(4, temp4, temp4S);
647 ONEITERBUTTERFLY(5, temp5, temp5S);
648 ONEITERBUTTERFLY(6, temp6, temp6S);
649 ONEITERBUTTERFLY(7, temp7, temp7S);
650 }
651#undef ONEITERBUTTERFLY
652 {
653 register vector signed int vsum;
654
655 register vector signed short line0 = vec_add(temp0, temp1);
656 register vector signed short line1 = vec_sub(temp0, temp1);
657 register vector signed short line2 = vec_add(temp2, temp3);
658 register vector signed short line3 = vec_sub(temp2, temp3);
659 register vector signed short line4 = vec_add(temp4, temp5);
660 register vector signed short line5 = vec_sub(temp4, temp5);
661 register vector signed short line6 = vec_add(temp6, temp7);
662 register vector signed short line7 = vec_sub(temp6, temp7);
663
664 register vector signed short line0B = vec_add(line0, line2);
665 register vector signed short line2B = vec_sub(line0, line2);
666 register vector signed short line1B = vec_add(line1, line3);
667 register vector signed short line3B = vec_sub(line1, line3);
668 register vector signed short line4B = vec_add(line4, line6);
669 register vector signed short line6B = vec_sub(line4, line6);
670 register vector signed short line5B = vec_add(line5, line7);
671 register vector signed short line7B = vec_sub(line5, line7);
672
673 register vector signed short line0C = vec_add(line0B, line4B);
674 register vector signed short line4C = vec_sub(line0B, line4B);
675 register vector signed short line1C = vec_add(line1B, line5B);
676 register vector signed short line5C = vec_sub(line1B, line5B);
677 register vector signed short line2C = vec_add(line2B, line6B);
678 register vector signed short line6C = vec_sub(line2B, line6B);
679 register vector signed short line3C = vec_add(line3B, line7B);
680 register vector signed short line7C = vec_sub(line3B, line7B);
681
682 register vector signed short line0S = vec_add(temp0S, temp1S);
683 register vector signed short line1S = vec_sub(temp0S, temp1S);
684 register vector signed short line2S = vec_add(temp2S, temp3S);
685 register vector signed short line3S = vec_sub(temp2S, temp3S);
686 register vector signed short line4S = vec_add(temp4S, temp5S);
687 register vector signed short line5S = vec_sub(temp4S, temp5S);
688 register vector signed short line6S = vec_add(temp6S, temp7S);
689 register vector signed short line7S = vec_sub(temp6S, temp7S);
690
691 register vector signed short line0BS = vec_add(line0S, line2S);
692 register vector signed short line2BS = vec_sub(line0S, line2S);
693 register vector signed short line1BS = vec_add(line1S, line3S);
694 register vector signed short line3BS = vec_sub(line1S, line3S);
695 register vector signed short line4BS = vec_add(line4S, line6S);
696 register vector signed short line6BS = vec_sub(line4S, line6S);
697 register vector signed short line5BS = vec_add(line5S, line7S);
698 register vector signed short line7BS = vec_sub(line5S, line7S);
699
700 register vector signed short line0CS = vec_add(line0BS, line4BS);
701 register vector signed short line4CS = vec_sub(line0BS, line4BS);
702 register vector signed short line1CS = vec_add(line1BS, line5BS);
703 register vector signed short line5CS = vec_sub(line1BS, line5BS);
704 register vector signed short line2CS = vec_add(line2BS, line6BS);
705 register vector signed short line6CS = vec_sub(line2BS, line6BS);
706 register vector signed short line3CS = vec_add(line3BS, line7BS);
707 register vector signed short line7CS = vec_sub(line3BS, line7BS);
708
709 vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
710 vsum = vec_sum4s(vec_abs(line1C), vsum);
711 vsum = vec_sum4s(vec_abs(line2C), vsum);
712 vsum = vec_sum4s(vec_abs(line3C), vsum);
713 vsum = vec_sum4s(vec_abs(line4C), vsum);
714 vsum = vec_sum4s(vec_abs(line5C), vsum);
715 vsum = vec_sum4s(vec_abs(line6C), vsum);
716 vsum = vec_sum4s(vec_abs(line7C), vsum);
717
718 vsum = vec_sum4s(vec_abs(line0CS), vsum);
719 vsum = vec_sum4s(vec_abs(line1CS), vsum);
720 vsum = vec_sum4s(vec_abs(line2CS), vsum);
721 vsum = vec_sum4s(vec_abs(line3CS), vsum);
722 vsum = vec_sum4s(vec_abs(line4CS), vsum);
723 vsum = vec_sum4s(vec_abs(line5CS), vsum);
724 vsum = vec_sum4s(vec_abs(line6CS), vsum);
725 vsum = vec_sum4s(vec_abs(line7CS), vsum);
726 vsum = vec_sums(vsum, (vector signed int) vzero);
727 vsum = vec_splat(vsum, 3);
728 vec_ste(vsum, 0, &sum);
729 }
730 return sum;
731}
732
733static int hadamard8_diff16_altivec(MpegEncContext *s, uint8_t *dst,
734 uint8_t *src, int stride, int h)
735{
736 int score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
737
738 if (h == 16) {
739 dst += 8 * stride;
740 src += 8 * stride;
741 score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
742 }
743 return score;
744}
745#endif /* HAVE_ALTIVEC */
746
747av_cold void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)
748{
749#if HAVE_ALTIVEC
750 if (!PPC_ALTIVEC(av_get_cpu_flags()))
751 return;
752
753 c->pix_abs[0][1] = sad16_x2_altivec;
754 c->pix_abs[0][2] = sad16_y2_altivec;
755 c->pix_abs[0][3] = sad16_xy2_altivec;
756 c->pix_abs[0][0] = sad16_altivec;
757 c->pix_abs[1][0] = sad8_altivec;
758
759 c->sad[0] = sad16_altivec;
760 c->sad[1] = sad8_altivec;
761 c->sse[0] = sse16_altivec;
762 c->sse[1] = sse8_altivec;
763
764 c->hadamard8_diff[0] = hadamard8_diff16_altivec;
765 c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
766#endif /* HAVE_ALTIVEC */
767}
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