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motion_est.c
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1 /*
2  * MMX optimized motion estimation
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
5  *
6  * mostly by Michael Niedermayer <michaelni@gmx.at>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "libavutil/attributes.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/mem.h"
28 #include "libavutil/x86/asm.h"
29 #include "dsputil_x86.h"
30 
31 #if HAVE_INLINE_ASM
32 
33 DECLARE_ASM_CONST(8, uint64_t, round_tab)[3]={
34 0x0000000000000000ULL,
35 0x0001000100010001ULL,
36 0x0002000200020002ULL,
37 };
38 
39 DECLARE_ASM_CONST(8, uint64_t, bone)= 0x0101010101010101LL;
40 
41 static inline void sad8_1_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
42 {
43  x86_reg len= -(x86_reg)stride*h;
44  __asm__ volatile(
45  ".p2align 4 \n\t"
46  "1: \n\t"
47  "movq (%1, %%"REG_a"), %%mm0 \n\t"
48  "movq (%2, %%"REG_a"), %%mm2 \n\t"
49  "movq (%2, %%"REG_a"), %%mm4 \n\t"
50  "add %3, %%"REG_a" \n\t"
51  "psubusb %%mm0, %%mm2 \n\t"
52  "psubusb %%mm4, %%mm0 \n\t"
53  "movq (%1, %%"REG_a"), %%mm1 \n\t"
54  "movq (%2, %%"REG_a"), %%mm3 \n\t"
55  "movq (%2, %%"REG_a"), %%mm5 \n\t"
56  "psubusb %%mm1, %%mm3 \n\t"
57  "psubusb %%mm5, %%mm1 \n\t"
58  "por %%mm2, %%mm0 \n\t"
59  "por %%mm1, %%mm3 \n\t"
60  "movq %%mm0, %%mm1 \n\t"
61  "movq %%mm3, %%mm2 \n\t"
62  "punpcklbw %%mm7, %%mm0 \n\t"
63  "punpckhbw %%mm7, %%mm1 \n\t"
64  "punpcklbw %%mm7, %%mm3 \n\t"
65  "punpckhbw %%mm7, %%mm2 \n\t"
66  "paddw %%mm1, %%mm0 \n\t"
67  "paddw %%mm3, %%mm2 \n\t"
68  "paddw %%mm2, %%mm0 \n\t"
69  "paddw %%mm0, %%mm6 \n\t"
70  "add %3, %%"REG_a" \n\t"
71  " js 1b \n\t"
72  : "+a" (len)
73  : "r" (blk1 - len), "r" (blk2 - len), "r" ((x86_reg)stride)
74  );
75 }
76 
77 static inline void sad8_1_mmxext(uint8_t *blk1, uint8_t *blk2,
78  int stride, int h)
79 {
80  __asm__ volatile(
81  ".p2align 4 \n\t"
82  "1: \n\t"
83  "movq (%1), %%mm0 \n\t"
84  "movq (%1, %3), %%mm1 \n\t"
85  "psadbw (%2), %%mm0 \n\t"
86  "psadbw (%2, %3), %%mm1 \n\t"
87  "paddw %%mm0, %%mm6 \n\t"
88  "paddw %%mm1, %%mm6 \n\t"
89  "lea (%1,%3,2), %1 \n\t"
90  "lea (%2,%3,2), %2 \n\t"
91  "sub $2, %0 \n\t"
92  " jg 1b \n\t"
93  : "+r" (h), "+r" (blk1), "+r" (blk2)
94  : "r" ((x86_reg)stride)
95  );
96 }
97 
98 static int sad16_sse2(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)
99 {
100  int ret;
101  __asm__ volatile(
102  "pxor %%xmm2, %%xmm2 \n\t"
103  ".p2align 4 \n\t"
104  "1: \n\t"
105  "movdqu (%1), %%xmm0 \n\t"
106  "movdqu (%1, %4), %%xmm1 \n\t"
107  "psadbw (%2), %%xmm0 \n\t"
108  "psadbw (%2, %4), %%xmm1 \n\t"
109  "paddw %%xmm0, %%xmm2 \n\t"
110  "paddw %%xmm1, %%xmm2 \n\t"
111  "lea (%1,%4,2), %1 \n\t"
112  "lea (%2,%4,2), %2 \n\t"
113  "sub $2, %0 \n\t"
114  " jg 1b \n\t"
115  "movhlps %%xmm2, %%xmm0 \n\t"
116  "paddw %%xmm0, %%xmm2 \n\t"
117  "movd %%xmm2, %3 \n\t"
118  : "+r" (h), "+r" (blk1), "+r" (blk2), "=r"(ret)
119  : "r" ((x86_reg)stride)
120  );
121  return ret;
122 }
123 
124 static inline void sad8_x2a_mmxext(uint8_t *blk1, uint8_t *blk2,
125  int stride, int h)
126 {
127  __asm__ volatile(
128  ".p2align 4 \n\t"
129  "1: \n\t"
130  "movq (%1), %%mm0 \n\t"
131  "movq (%1, %3), %%mm1 \n\t"
132  "pavgb 1(%1), %%mm0 \n\t"
133  "pavgb 1(%1, %3), %%mm1 \n\t"
134  "psadbw (%2), %%mm0 \n\t"
135  "psadbw (%2, %3), %%mm1 \n\t"
136  "paddw %%mm0, %%mm6 \n\t"
137  "paddw %%mm1, %%mm6 \n\t"
138  "lea (%1,%3,2), %1 \n\t"
139  "lea (%2,%3,2), %2 \n\t"
140  "sub $2, %0 \n\t"
141  " jg 1b \n\t"
142  : "+r" (h), "+r" (blk1), "+r" (blk2)
143  : "r" ((x86_reg)stride)
144  );
145 }
146 
147 static inline void sad8_y2a_mmxext(uint8_t *blk1, uint8_t *blk2,
148  int stride, int h)
149 {
150  __asm__ volatile(
151  "movq (%1), %%mm0 \n\t"
152  "add %3, %1 \n\t"
153  ".p2align 4 \n\t"
154  "1: \n\t"
155  "movq (%1), %%mm1 \n\t"
156  "movq (%1, %3), %%mm2 \n\t"
157  "pavgb %%mm1, %%mm0 \n\t"
158  "pavgb %%mm2, %%mm1 \n\t"
159  "psadbw (%2), %%mm0 \n\t"
160  "psadbw (%2, %3), %%mm1 \n\t"
161  "paddw %%mm0, %%mm6 \n\t"
162  "paddw %%mm1, %%mm6 \n\t"
163  "movq %%mm2, %%mm0 \n\t"
164  "lea (%1,%3,2), %1 \n\t"
165  "lea (%2,%3,2), %2 \n\t"
166  "sub $2, %0 \n\t"
167  " jg 1b \n\t"
168  : "+r" (h), "+r" (blk1), "+r" (blk2)
169  : "r" ((x86_reg)stride)
170  );
171 }
172 
173 static inline void sad8_4_mmxext(uint8_t *blk1, uint8_t *blk2,
174  int stride, int h)
175 {
176  __asm__ volatile(
177  "movq "MANGLE(bone)", %%mm5 \n\t"
178  "movq (%1), %%mm0 \n\t"
179  "pavgb 1(%1), %%mm0 \n\t"
180  "add %3, %1 \n\t"
181  ".p2align 4 \n\t"
182  "1: \n\t"
183  "movq (%1), %%mm1 \n\t"
184  "movq (%1,%3), %%mm2 \n\t"
185  "pavgb 1(%1), %%mm1 \n\t"
186  "pavgb 1(%1,%3), %%mm2 \n\t"
187  "psubusb %%mm5, %%mm1 \n\t"
188  "pavgb %%mm1, %%mm0 \n\t"
189  "pavgb %%mm2, %%mm1 \n\t"
190  "psadbw (%2), %%mm0 \n\t"
191  "psadbw (%2,%3), %%mm1 \n\t"
192  "paddw %%mm0, %%mm6 \n\t"
193  "paddw %%mm1, %%mm6 \n\t"
194  "movq %%mm2, %%mm0 \n\t"
195  "lea (%1,%3,2), %1 \n\t"
196  "lea (%2,%3,2), %2 \n\t"
197  "sub $2, %0 \n\t"
198  " jg 1b \n\t"
199  : "+r" (h), "+r" (blk1), "+r" (blk2)
200  : "r" ((x86_reg)stride)
201  );
202 }
203 
204 static inline void sad8_2_mmx(uint8_t *blk1a, uint8_t *blk1b, uint8_t *blk2, int stride, int h)
205 {
206  x86_reg len= -(x86_reg)stride*h;
207  __asm__ volatile(
208  ".p2align 4 \n\t"
209  "1: \n\t"
210  "movq (%1, %%"REG_a"), %%mm0 \n\t"
211  "movq (%2, %%"REG_a"), %%mm1 \n\t"
212  "movq (%1, %%"REG_a"), %%mm2 \n\t"
213  "movq (%2, %%"REG_a"), %%mm3 \n\t"
214  "punpcklbw %%mm7, %%mm0 \n\t"
215  "punpcklbw %%mm7, %%mm1 \n\t"
216  "punpckhbw %%mm7, %%mm2 \n\t"
217  "punpckhbw %%mm7, %%mm3 \n\t"
218  "paddw %%mm0, %%mm1 \n\t"
219  "paddw %%mm2, %%mm3 \n\t"
220  "movq (%3, %%"REG_a"), %%mm4 \n\t"
221  "movq (%3, %%"REG_a"), %%mm2 \n\t"
222  "paddw %%mm5, %%mm1 \n\t"
223  "paddw %%mm5, %%mm3 \n\t"
224  "psrlw $1, %%mm1 \n\t"
225  "psrlw $1, %%mm3 \n\t"
226  "packuswb %%mm3, %%mm1 \n\t"
227  "psubusb %%mm1, %%mm4 \n\t"
228  "psubusb %%mm2, %%mm1 \n\t"
229  "por %%mm4, %%mm1 \n\t"
230  "movq %%mm1, %%mm0 \n\t"
231  "punpcklbw %%mm7, %%mm0 \n\t"
232  "punpckhbw %%mm7, %%mm1 \n\t"
233  "paddw %%mm1, %%mm0 \n\t"
234  "paddw %%mm0, %%mm6 \n\t"
235  "add %4, %%"REG_a" \n\t"
236  " js 1b \n\t"
237  : "+a" (len)
238  : "r" (blk1a - len), "r" (blk1b -len), "r" (blk2 - len), "r" ((x86_reg)stride)
239  );
240 }
241 
242 static inline void sad8_4_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
243 {
244  x86_reg len= -(x86_reg)stride*h;
245  __asm__ volatile(
246  "movq (%1, %%"REG_a"), %%mm0 \n\t"
247  "movq 1(%1, %%"REG_a"), %%mm2 \n\t"
248  "movq %%mm0, %%mm1 \n\t"
249  "movq %%mm2, %%mm3 \n\t"
250  "punpcklbw %%mm7, %%mm0 \n\t"
251  "punpckhbw %%mm7, %%mm1 \n\t"
252  "punpcklbw %%mm7, %%mm2 \n\t"
253  "punpckhbw %%mm7, %%mm3 \n\t"
254  "paddw %%mm2, %%mm0 \n\t"
255  "paddw %%mm3, %%mm1 \n\t"
256  ".p2align 4 \n\t"
257  "1: \n\t"
258  "movq (%2, %%"REG_a"), %%mm2 \n\t"
259  "movq 1(%2, %%"REG_a"), %%mm4 \n\t"
260  "movq %%mm2, %%mm3 \n\t"
261  "movq %%mm4, %%mm5 \n\t"
262  "punpcklbw %%mm7, %%mm2 \n\t"
263  "punpckhbw %%mm7, %%mm3 \n\t"
264  "punpcklbw %%mm7, %%mm4 \n\t"
265  "punpckhbw %%mm7, %%mm5 \n\t"
266  "paddw %%mm4, %%mm2 \n\t"
267  "paddw %%mm5, %%mm3 \n\t"
268  "movq 16+"MANGLE(round_tab)", %%mm5 \n\t"
269  "paddw %%mm2, %%mm0 \n\t"
270  "paddw %%mm3, %%mm1 \n\t"
271  "paddw %%mm5, %%mm0 \n\t"
272  "paddw %%mm5, %%mm1 \n\t"
273  "movq (%3, %%"REG_a"), %%mm4 \n\t"
274  "movq (%3, %%"REG_a"), %%mm5 \n\t"
275  "psrlw $2, %%mm0 \n\t"
276  "psrlw $2, %%mm1 \n\t"
277  "packuswb %%mm1, %%mm0 \n\t"
278  "psubusb %%mm0, %%mm4 \n\t"
279  "psubusb %%mm5, %%mm0 \n\t"
280  "por %%mm4, %%mm0 \n\t"
281  "movq %%mm0, %%mm4 \n\t"
282  "punpcklbw %%mm7, %%mm0 \n\t"
283  "punpckhbw %%mm7, %%mm4 \n\t"
284  "paddw %%mm0, %%mm6 \n\t"
285  "paddw %%mm4, %%mm6 \n\t"
286  "movq %%mm2, %%mm0 \n\t"
287  "movq %%mm3, %%mm1 \n\t"
288  "add %4, %%"REG_a" \n\t"
289  " js 1b \n\t"
290  : "+a" (len)
291  : "r" (blk1 - len), "r" (blk1 -len + stride), "r" (blk2 - len), "r" ((x86_reg)stride)
292  );
293 }
294 
295 static inline int sum_mmx(void)
296 {
297  int ret;
298  __asm__ volatile(
299  "movq %%mm6, %%mm0 \n\t"
300  "psrlq $32, %%mm6 \n\t"
301  "paddw %%mm0, %%mm6 \n\t"
302  "movq %%mm6, %%mm0 \n\t"
303  "psrlq $16, %%mm6 \n\t"
304  "paddw %%mm0, %%mm6 \n\t"
305  "movd %%mm6, %0 \n\t"
306  : "=r" (ret)
307  );
308  return ret&0xFFFF;
309 }
310 
311 static inline int sum_mmxext(void)
312 {
313  int ret;
314  __asm__ volatile(
315  "movd %%mm6, %0 \n\t"
316  : "=r" (ret)
317  );
318  return ret;
319 }
320 
321 static inline void sad8_x2a_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
322 {
323  sad8_2_mmx(blk1, blk1+1, blk2, stride, h);
324 }
325 static inline void sad8_y2a_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
326 {
327  sad8_2_mmx(blk1, blk1+stride, blk2, stride, h);
328 }
329 
330 
331 #define PIX_SAD(suf)\
332 static int sad8_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
333 {\
334  av_assert2(h==8);\
335  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
336  "pxor %%mm6, %%mm6 \n\t":);\
337 \
338  sad8_1_ ## suf(blk1, blk2, stride, 8);\
339 \
340  return sum_ ## suf();\
341 }\
342 static int sad8_x2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
343 {\
344  av_assert2(h==8);\
345  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
346  "pxor %%mm6, %%mm6 \n\t"\
347  "movq %0, %%mm5 \n\t"\
348  :: "m"(round_tab[1]) \
349  );\
350 \
351  sad8_x2a_ ## suf(blk1, blk2, stride, 8);\
352 \
353  return sum_ ## suf();\
354 }\
355 \
356 static int sad8_y2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
357 {\
358  av_assert2(h==8);\
359  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
360  "pxor %%mm6, %%mm6 \n\t"\
361  "movq %0, %%mm5 \n\t"\
362  :: "m"(round_tab[1]) \
363  );\
364 \
365  sad8_y2a_ ## suf(blk1, blk2, stride, 8);\
366 \
367  return sum_ ## suf();\
368 }\
369 \
370 static int sad8_xy2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
371 {\
372  av_assert2(h==8);\
373  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
374  "pxor %%mm6, %%mm6 \n\t"\
375  ::);\
376 \
377  sad8_4_ ## suf(blk1, blk2, stride, 8);\
378 \
379  return sum_ ## suf();\
380 }\
381 \
382 static int sad16_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
383 {\
384  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
385  "pxor %%mm6, %%mm6 \n\t":);\
386 \
387  sad8_1_ ## suf(blk1 , blk2 , stride, h);\
388  sad8_1_ ## suf(blk1+8, blk2+8, stride, h);\
389 \
390  return sum_ ## suf();\
391 }\
392 static int sad16_x2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
393 {\
394  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
395  "pxor %%mm6, %%mm6 \n\t"\
396  "movq %0, %%mm5 \n\t"\
397  :: "m"(round_tab[1]) \
398  );\
399 \
400  sad8_x2a_ ## suf(blk1 , blk2 , stride, h);\
401  sad8_x2a_ ## suf(blk1+8, blk2+8, stride, h);\
402 \
403  return sum_ ## suf();\
404 }\
405 static int sad16_y2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
406 {\
407  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
408  "pxor %%mm6, %%mm6 \n\t"\
409  "movq %0, %%mm5 \n\t"\
410  :: "m"(round_tab[1]) \
411  );\
412 \
413  sad8_y2a_ ## suf(blk1 , blk2 , stride, h);\
414  sad8_y2a_ ## suf(blk1+8, blk2+8, stride, h);\
415 \
416  return sum_ ## suf();\
417 }\
418 static int sad16_xy2_ ## suf(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)\
419 {\
420  __asm__ volatile("pxor %%mm7, %%mm7 \n\t"\
421  "pxor %%mm6, %%mm6 \n\t"\
422  ::);\
423 \
424  sad8_4_ ## suf(blk1 , blk2 , stride, h);\
425  sad8_4_ ## suf(blk1+8, blk2+8, stride, h);\
426 \
427  return sum_ ## suf();\
428 }\
429 
430 PIX_SAD(mmx)
431 PIX_SAD(mmxext)
432 
433 #endif /* HAVE_INLINE_ASM */
434 
435 av_cold void ff_dsputil_init_pix_mmx(DSPContext *c, AVCodecContext *avctx)
436 {
437 #if HAVE_INLINE_ASM
438  int mm_flags = av_get_cpu_flags();
439 
440  if (mm_flags & AV_CPU_FLAG_MMX) {
441  c->pix_abs[0][0] = sad16_mmx;
442  c->pix_abs[0][1] = sad16_x2_mmx;
443  c->pix_abs[0][2] = sad16_y2_mmx;
444  c->pix_abs[0][3] = sad16_xy2_mmx;
445  c->pix_abs[1][0] = sad8_mmx;
446  c->pix_abs[1][1] = sad8_x2_mmx;
447  c->pix_abs[1][2] = sad8_y2_mmx;
448  c->pix_abs[1][3] = sad8_xy2_mmx;
449 
450  c->sad[0]= sad16_mmx;
451  c->sad[1]= sad8_mmx;
452  }
453  if (mm_flags & AV_CPU_FLAG_MMXEXT) {
454  c->pix_abs[0][0] = sad16_mmxext;
455  c->pix_abs[1][0] = sad8_mmxext;
456 
457  c->sad[0] = sad16_mmxext;
458  c->sad[1] = sad8_mmxext;
459 
460  if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
461  c->pix_abs[0][1] = sad16_x2_mmxext;
462  c->pix_abs[0][2] = sad16_y2_mmxext;
463  c->pix_abs[0][3] = sad16_xy2_mmxext;
464  c->pix_abs[1][1] = sad8_x2_mmxext;
465  c->pix_abs[1][2] = sad8_y2_mmxext;
466  c->pix_abs[1][3] = sad8_xy2_mmxext;
467  }
468  }
469  if ((mm_flags & AV_CPU_FLAG_SSE2) && !(mm_flags & AV_CPU_FLAG_3DNOW) && avctx->codec_id != AV_CODEC_ID_SNOW) {
470  c->sad[0]= sad16_sse2;
471  }
472 #endif /* HAVE_INLINE_ASM */
473 }
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