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
sad16_x2_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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
sad16_y2_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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
sad16_xy2_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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
sad16_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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
sad8_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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. */
sse8_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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. */
sse16_altivec(MpegEncContext * v,uint8_t * pix1,uint8_t * pix2,ptrdiff_t stride,int h)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
hadamard8_diff8x8_altivec(MpegEncContext * s,uint8_t * dst,uint8_t * src,ptrdiff_t stride,int h)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 */
hadamard8_diff16x8_altivec(MpegEncContext * s,uint8_t * dst,uint8_t * src,ptrdiff_t stride,int h)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
hadamard8_diff16_altivec(MpegEncContext * s,uint8_t * dst,uint8_t * src,ptrdiff_t stride,int h)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
ff_me_cmp_init_ppc(MECmpContext * c,AVCodecContext * avctx)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 }
747