git.sesse.net Git - ffmpeg/blob - libavcodec/x86/motion_est.c

   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 "libavutil/x86/cpu.h"
  30 #include "dsputil_x86.h"
  31
  32 #if HAVE_INLINE_ASM
  33
  34 DECLARE_ASM_CONST(8, uint64_t, round_tab)[3] = {
  35     0x0000000000000000ULL,
  36     0x0001000100010001ULL,
  37     0x0002000200020002ULL,
  38 };
  39
  40 DECLARE_ASM_CONST(8, uint64_t, bone) = 0x0101010101010101LL;
  41
  42 static inline void sad8_1_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
  43 {
  44     x86_reg len = -(x86_reg)stride * h;
  45     __asm__ volatile (
  46         ".p2align 4                     \n\t"
  47         "1:                             \n\t"
  48         "movq (%1, %%"REG_a"), %%mm0    \n\t"
  49         "movq (%2, %%"REG_a"), %%mm2    \n\t"
  50         "movq (%2, %%"REG_a"), %%mm4    \n\t"
  51         "add %3, %%"REG_a"              \n\t"
  52         "psubusb %%mm0, %%mm2           \n\t"
  53         "psubusb %%mm4, %%mm0           \n\t"
  54         "movq (%1, %%"REG_a"), %%mm1    \n\t"
  55         "movq (%2, %%"REG_a"), %%mm3    \n\t"
  56         "movq (%2, %%"REG_a"), %%mm5    \n\t"
  57         "psubusb %%mm1, %%mm3           \n\t"
  58         "psubusb %%mm5, %%mm1           \n\t"
  59         "por %%mm2, %%mm0               \n\t"
  60         "por %%mm1, %%mm3               \n\t"
  61         "movq %%mm0, %%mm1              \n\t"
  62         "movq %%mm3, %%mm2              \n\t"
  63         "punpcklbw %%mm7, %%mm0         \n\t"
  64         "punpckhbw %%mm7, %%mm1         \n\t"
  65         "punpcklbw %%mm7, %%mm3         \n\t"
  66         "punpckhbw %%mm7, %%mm2         \n\t"
  67         "paddw %%mm1, %%mm0             \n\t"
  68         "paddw %%mm3, %%mm2             \n\t"
  69         "paddw %%mm2, %%mm0             \n\t"
  70         "paddw %%mm0, %%mm6             \n\t"
  71         "add %3, %%"REG_a"              \n\t"
  72         " js 1b                         \n\t"
  73         : "+a" (len)
  74         : "r" (blk1 - len), "r" (blk2 - len), "r" ((x86_reg) stride));
  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 static int sad16_sse2(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)
  98 {
  99     int ret;
 100     __asm__ volatile (
 101         "pxor %%xmm2, %%xmm2            \n\t"
 102         ".p2align 4                     \n\t"
 103         "1:                             \n\t"
 104         "movdqu (%1), %%xmm0            \n\t"
 105         "movdqu (%1, %4), %%xmm1        \n\t"
 106         "psadbw (%2), %%xmm0            \n\t"
 107         "psadbw (%2, %4), %%xmm1        \n\t"
 108         "paddw %%xmm0, %%xmm2           \n\t"
 109         "paddw %%xmm1, %%xmm2           \n\t"
 110         "lea (%1,%4,2), %1              \n\t"
 111         "lea (%2,%4,2), %2              \n\t"
 112         "sub $2, %0                     \n\t"
 113         " jg 1b                         \n\t"
 114         "movhlps %%xmm2, %%xmm0         \n\t"
 115         "paddw   %%xmm0, %%xmm2         \n\t"
 116         "movd    %%xmm2, %3             \n\t"
 117         : "+r" (h), "+r" (blk1), "+r" (blk2), "=r" (ret)
 118         : "r" ((x86_reg) stride));
 119     return ret;
 120 }
 121
 122 static inline void sad8_x2a_mmxext(uint8_t *blk1, uint8_t *blk2,
 123                                    int stride, int h)
 124 {
 125     __asm__ volatile (
 126         ".p2align 4                     \n\t"
 127         "1:                             \n\t"
 128         "movq (%1), %%mm0               \n\t"
 129         "movq (%1, %3), %%mm1           \n\t"
 130         "pavgb 1(%1), %%mm0             \n\t"
 131         "pavgb 1(%1, %3), %%mm1         \n\t"
 132         "psadbw (%2), %%mm0             \n\t"
 133         "psadbw (%2, %3), %%mm1         \n\t"
 134         "paddw %%mm0, %%mm6             \n\t"
 135         "paddw %%mm1, %%mm6             \n\t"
 136         "lea (%1,%3,2), %1              \n\t"
 137         "lea (%2,%3,2), %2              \n\t"
 138         "sub $2, %0                     \n\t"
 139         " jg 1b                         \n\t"
 140         : "+r" (h), "+r" (blk1), "+r" (blk2)
 141         : "r" ((x86_reg) stride));
 142 }
 143
 144 static inline void sad8_y2a_mmxext(uint8_t *blk1, uint8_t *blk2,
 145                                    int stride, int h)
 146 {
 147     __asm__ volatile (
 148         "movq (%1), %%mm0               \n\t"
 149         "add %3, %1                     \n\t"
 150         ".p2align 4                     \n\t"
 151         "1:                             \n\t"
 152         "movq (%1), %%mm1               \n\t"
 153         "movq (%1, %3), %%mm2           \n\t"
 154         "pavgb %%mm1, %%mm0             \n\t"
 155         "pavgb %%mm2, %%mm1             \n\t"
 156         "psadbw (%2), %%mm0             \n\t"
 157         "psadbw (%2, %3), %%mm1         \n\t"
 158         "paddw %%mm0, %%mm6             \n\t"
 159         "paddw %%mm1, %%mm6             \n\t"
 160         "movq %%mm2, %%mm0              \n\t"
 161         "lea (%1,%3,2), %1              \n\t"
 162         "lea (%2,%3,2), %2              \n\t"
 163         "sub $2, %0                     \n\t"
 164         " jg 1b                         \n\t"
 165         : "+r" (h), "+r" (blk1), "+r" (blk2)
 166         : "r" ((x86_reg) stride));
 167 }
 168
 169 static inline void sad8_4_mmxext(uint8_t *blk1, uint8_t *blk2,
 170                                  int stride, int h)
 171 {
 172     __asm__ volatile (
 173         "movq "MANGLE(bone)", %%mm5     \n\t"
 174         "movq (%1), %%mm0               \n\t"
 175         "pavgb 1(%1), %%mm0             \n\t"
 176         "add %3, %1                     \n\t"
 177         ".p2align 4                     \n\t"
 178         "1:                             \n\t"
 179         "movq (%1), %%mm1               \n\t"
 180         "movq (%1,%3), %%mm2            \n\t"
 181         "pavgb 1(%1), %%mm1             \n\t"
 182         "pavgb 1(%1,%3), %%mm2          \n\t"
 183         "psubusb %%mm5, %%mm1           \n\t"
 184         "pavgb %%mm1, %%mm0             \n\t"
 185         "pavgb %%mm2, %%mm1             \n\t"
 186         "psadbw (%2), %%mm0             \n\t"
 187         "psadbw (%2,%3), %%mm1          \n\t"
 188         "paddw %%mm0, %%mm6             \n\t"
 189         "paddw %%mm1, %%mm6             \n\t"
 190         "movq %%mm2, %%mm0              \n\t"
 191         "lea (%1,%3,2), %1              \n\t"
 192         "lea (%2,%3,2), %2              \n\t"
 193         "sub $2, %0                     \n\t"
 194         " jg 1b                         \n\t"
 195         : "+r" (h), "+r" (blk1), "+r" (blk2)
 196         : "r" ((x86_reg) stride));
 197 }
 198
 199 static inline void sad8_2_mmx(uint8_t *blk1a, uint8_t *blk1b, uint8_t *blk2,
 200                               int stride, int h)
 201 {
 202     x86_reg len = -(x86_reg)stride * h;
 203     __asm__ volatile (
 204         ".p2align 4                     \n\t"
 205         "1:                             \n\t"
 206         "movq (%1, %%"REG_a"), %%mm0    \n\t"
 207         "movq (%2, %%"REG_a"), %%mm1    \n\t"
 208         "movq (%1, %%"REG_a"), %%mm2    \n\t"
 209         "movq (%2, %%"REG_a"), %%mm3    \n\t"
 210         "punpcklbw %%mm7, %%mm0         \n\t"
 211         "punpcklbw %%mm7, %%mm1         \n\t"
 212         "punpckhbw %%mm7, %%mm2         \n\t"
 213         "punpckhbw %%mm7, %%mm3         \n\t"
 214         "paddw %%mm0, %%mm1             \n\t"
 215         "paddw %%mm2, %%mm3             \n\t"
 216         "movq (%3, %%"REG_a"), %%mm4    \n\t"
 217         "movq (%3, %%"REG_a"), %%mm2    \n\t"
 218         "paddw %%mm5, %%mm1             \n\t"
 219         "paddw %%mm5, %%mm3             \n\t"
 220         "psrlw $1, %%mm1                \n\t"
 221         "psrlw $1, %%mm3                \n\t"
 222         "packuswb %%mm3, %%mm1          \n\t"
 223         "psubusb %%mm1, %%mm4           \n\t"
 224         "psubusb %%mm2, %%mm1           \n\t"
 225         "por %%mm4, %%mm1               \n\t"
 226         "movq %%mm1, %%mm0              \n\t"
 227         "punpcklbw %%mm7, %%mm0         \n\t"
 228         "punpckhbw %%mm7, %%mm1         \n\t"
 229         "paddw %%mm1, %%mm0             \n\t"
 230         "paddw %%mm0, %%mm6             \n\t"
 231         "add %4, %%"REG_a"              \n\t"
 232         " js 1b                         \n\t"
 233         : "+a" (len)
 234         : "r" (blk1a - len), "r" (blk1b - len), "r" (blk2 - len),
 235           "r" ((x86_reg) stride));
 236 }
 237
 238 static inline void sad8_4_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
 239 {
 240     x86_reg len = -(x86_reg)stride * h;
 241     __asm__ volatile (
 242         "movq  (%1, %%"REG_a"), %%mm0   \n\t"
 243         "movq 1(%1, %%"REG_a"), %%mm2   \n\t"
 244         "movq %%mm0, %%mm1              \n\t"
 245         "movq %%mm2, %%mm3              \n\t"
 246         "punpcklbw %%mm7, %%mm0         \n\t"
 247         "punpckhbw %%mm7, %%mm1         \n\t"
 248         "punpcklbw %%mm7, %%mm2         \n\t"
 249         "punpckhbw %%mm7, %%mm3         \n\t"
 250         "paddw %%mm2, %%mm0             \n\t"
 251         "paddw %%mm3, %%mm1             \n\t"
 252         ".p2align 4                     \n\t"
 253         "1:                             \n\t"
 254         "movq  (%2, %%"REG_a"), %%mm2   \n\t"
 255         "movq 1(%2, %%"REG_a"), %%mm4   \n\t"
 256         "movq %%mm2, %%mm3              \n\t"
 257         "movq %%mm4, %%mm5              \n\t"
 258         "punpcklbw %%mm7, %%mm2         \n\t"
 259         "punpckhbw %%mm7, %%mm3         \n\t"
 260         "punpcklbw %%mm7, %%mm4         \n\t"
 261         "punpckhbw %%mm7, %%mm5         \n\t"
 262         "paddw %%mm4, %%mm2             \n\t"
 263         "paddw %%mm5, %%mm3             \n\t"
 264         "movq 16+"MANGLE(round_tab)", %%mm5 \n\t"
 265         "paddw %%mm2, %%mm0             \n\t"
 266         "paddw %%mm3, %%mm1             \n\t"
 267         "paddw %%mm5, %%mm0             \n\t"
 268         "paddw %%mm5, %%mm1             \n\t"
 269         "movq (%3, %%"REG_a"), %%mm4    \n\t"
 270         "movq (%3, %%"REG_a"), %%mm5    \n\t"
 271         "psrlw $2, %%mm0                \n\t"
 272         "psrlw $2, %%mm1                \n\t"
 273         "packuswb %%mm1, %%mm0          \n\t"
 274         "psubusb %%mm0, %%mm4           \n\t"
 275         "psubusb %%mm5, %%mm0           \n\t"
 276         "por %%mm4, %%mm0               \n\t"
 277         "movq %%mm0, %%mm4              \n\t"
 278         "punpcklbw %%mm7, %%mm0         \n\t"
 279         "punpckhbw %%mm7, %%mm4         \n\t"
 280         "paddw %%mm0, %%mm6             \n\t"
 281         "paddw %%mm4, %%mm6             \n\t"
 282         "movq  %%mm2, %%mm0             \n\t"
 283         "movq  %%mm3, %%mm1             \n\t"
 284         "add %4, %%"REG_a"              \n\t"
 285         " js 1b                         \n\t"
 286         : "+a" (len)
 287         : "r" (blk1 - len), "r" (blk1 - len + stride), "r" (blk2 - len),
 288           "r" ((x86_reg) stride));
 289 }
 290
 291 static inline int sum_mmx(void)
 292 {
 293     int ret;
 294     __asm__ volatile (
 295         "movq %%mm6, %%mm0              \n\t"
 296         "psrlq $32, %%mm6               \n\t"
 297         "paddw %%mm0, %%mm6             \n\t"
 298         "movq %%mm6, %%mm0              \n\t"
 299         "psrlq $16, %%mm6               \n\t"
 300         "paddw %%mm0, %%mm6             \n\t"
 301         "movd %%mm6, %0                 \n\t"
 302         : "=r" (ret));
 303     return ret & 0xFFFF;
 304 }
 305
 306 static inline int sum_mmxext(void)
 307 {
 308     int ret;
 309     __asm__ volatile (
 310         "movd %%mm6, %0                 \n\t"
 311         : "=r" (ret));
 312     return ret;
 313 }
 314
 315 static inline void sad8_x2a_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
 316 {
 317     sad8_2_mmx(blk1, blk1 + 1, blk2, stride, h);
 318 }
 319
 320 static inline void sad8_y2a_mmx(uint8_t *blk1, uint8_t *blk2, int stride, int h)
 321 {
 322     sad8_2_mmx(blk1, blk1 + stride, blk2, stride, h);
 323 }
 324
 325 #define PIX_SAD(suf)                                                    \
 326 static int sad8_ ## suf(void *v, uint8_t *blk2,                         \
 327                         uint8_t *blk1, int stride, int h)               \
 328 {                                                                       \
 329     av_assert2(h == 8);                                                     \
 330     __asm__ volatile (                                                  \
 331         "pxor %%mm7, %%mm7     \n\t"                                    \
 332         "pxor %%mm6, %%mm6     \n\t"                                    \
 333         :);                                                             \
 334                                                                         \
 335     sad8_1_ ## suf(blk1, blk2, stride, 8);                              \
 336                                                                         \
 337     return sum_ ## suf();                                               \
 338 }                                                                       \
 339                                                                         \
 340 static int sad8_x2_ ## suf(void *v, uint8_t *blk2,                      \
 341                            uint8_t *blk1, int stride, int h)            \
 342 {                                                                       \
 343     av_assert2(h == 8);                                                     \
 344     __asm__ volatile (                                                  \
 345         "pxor %%mm7, %%mm7     \n\t"                                    \
 346         "pxor %%mm6, %%mm6     \n\t"                                    \
 347         "movq %0, %%mm5        \n\t"                                    \
 348         :: "m" (round_tab[1]));                                         \
 349                                                                         \
 350     sad8_x2a_ ## suf(blk1, blk2, stride, 8);                            \
 351                                                                         \
 352     return sum_ ## suf();                                               \
 353 }                                                                       \
 354                                                                         \
 355 static int sad8_y2_ ## suf(void *v, uint8_t *blk2,                      \
 356                            uint8_t *blk1, int stride, int h)            \
 357 {                                                                       \
 358     av_assert2(h == 8);                                                     \
 359     __asm__ volatile (                                                  \
 360         "pxor %%mm7, %%mm7     \n\t"                                    \
 361         "pxor %%mm6, %%mm6     \n\t"                                    \
 362         "movq %0, %%mm5        \n\t"                                    \
 363         :: "m" (round_tab[1]));                                         \
 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,                     \
 371                             uint8_t *blk1, int stride, int h)           \
 372 {                                                                       \
 373     av_assert2(h == 8);                                                     \
 374     __asm__ volatile (                                                  \
 375         "pxor %%mm7, %%mm7     \n\t"                                    \
 376         "pxor %%mm6, %%mm6     \n\t"                                    \
 377         ::);                                                            \
 378                                                                         \
 379     sad8_4_ ## suf(blk1, blk2, stride, 8);                              \
 380                                                                         \
 381     return sum_ ## suf();                                               \
 382 }                                                                       \
 383                                                                         \
 384 static int sad16_ ## suf(void *v, uint8_t *blk2,                        \
 385                          uint8_t *blk1, int stride, int h)              \
 386 {                                                                       \
 387     __asm__ volatile (                                                  \
 388         "pxor %%mm7, %%mm7     \n\t"                                    \
 389         "pxor %%mm6, %%mm6     \n\t"                                    \
 390         :);                                                             \
 391                                                                         \
 392     sad8_1_ ## suf(blk1,     blk2,     stride, h);                      \
 393     sad8_1_ ## suf(blk1 + 8, blk2 + 8, stride, h);                      \
 394                                                                         \
 395     return sum_ ## suf();                                               \
 396 }                                                                       \
 397                                                                         \
 398 static int sad16_x2_ ## suf(void *v, uint8_t *blk2,                     \
 399                             uint8_t *blk1, int stride, int h)           \
 400 {                                                                       \
 401     __asm__ volatile (                                                  \
 402         "pxor %%mm7, %%mm7     \n\t"                                    \
 403         "pxor %%mm6, %%mm6     \n\t"                                    \
 404         "movq %0, %%mm5        \n\t"                                    \
 405         :: "m" (round_tab[1]));                                         \
 406                                                                         \
 407     sad8_x2a_ ## suf(blk1,     blk2,     stride, h);                    \
 408     sad8_x2a_ ## suf(blk1 + 8, blk2 + 8, stride, h);                    \
 409                                                                         \
 410     return sum_ ## suf();                                               \
 411 }                                                                       \
 412                                                                         \
 413 static int sad16_y2_ ## suf(void *v, uint8_t *blk2,                     \
 414                             uint8_t *blk1, int stride, int h)           \
 415 {                                                                       \
 416     __asm__ volatile (                                                  \
 417         "pxor %%mm7, %%mm7     \n\t"                                    \
 418         "pxor %%mm6, %%mm6     \n\t"                                    \
 419         "movq %0, %%mm5        \n\t"                                    \
 420         :: "m" (round_tab[1]));                                         \
 421                                                                         \
 422     sad8_y2a_ ## suf(blk1,     blk2,     stride, h);                    \
 423     sad8_y2a_ ## suf(blk1 + 8, blk2 + 8, stride, h);                    \
 424                                                                         \
 425     return sum_ ## suf();                                               \
 426 }                                                                       \
 427                                                                         \
 428 static int sad16_xy2_ ## suf(void *v, uint8_t *blk2,                    \
 429                              uint8_t *blk1, int stride, int h)          \
 430 {                                                                       \
 431     __asm__ volatile (                                                  \
 432         "pxor %%mm7, %%mm7     \n\t"                                    \
 433         "pxor %%mm6, %%mm6     \n\t"                                    \
 434         ::);                                                            \
 435                                                                         \
 436     sad8_4_ ## suf(blk1,     blk2,     stride, h);                      \
 437     sad8_4_ ## suf(blk1 + 8, blk2 + 8, stride, h);                      \
 438                                                                         \
 439     return sum_ ## suf();                                               \
 440 }                                                                       \
 441
 442 PIX_SAD(mmx)
 443 PIX_SAD(mmxext)
 444
 445 #endif /* HAVE_INLINE_ASM */
 446
 447 av_cold void ff_dsputil_init_pix_mmx(DSPContext *c, AVCodecContext *avctx)
 448 {
 449 #if HAVE_INLINE_ASM
 450     int cpu_flags = av_get_cpu_flags();
 451
 452     if (INLINE_MMX(cpu_flags)) {
 453         c->pix_abs[0][0] = sad16_mmx;
 454         c->pix_abs[0][1] = sad16_x2_mmx;
 455         c->pix_abs[0][2] = sad16_y2_mmx;
 456         c->pix_abs[0][3] = sad16_xy2_mmx;
 457         c->pix_abs[1][0] = sad8_mmx;
 458         c->pix_abs[1][1] = sad8_x2_mmx;
 459         c->pix_abs[1][2] = sad8_y2_mmx;
 460         c->pix_abs[1][3] = sad8_xy2_mmx;
 461
 462         c->sad[0] = sad16_mmx;
 463         c->sad[1] = sad8_mmx;
 464     }
 465     if (INLINE_MMXEXT(cpu_flags)) {
 466         c->pix_abs[0][0] = sad16_mmxext;
 467         c->pix_abs[1][0] = sad8_mmxext;
 468
 469         c->sad[0] = sad16_mmxext;
 470         c->sad[1] = sad8_mmxext;
 471
 472         if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
 473             c->pix_abs[0][1] = sad16_x2_mmxext;
 474             c->pix_abs[0][2] = sad16_y2_mmxext;
 475             c->pix_abs[0][3] = sad16_xy2_mmxext;
 476             c->pix_abs[1][1] = sad8_x2_mmxext;
 477             c->pix_abs[1][2] = sad8_y2_mmxext;
 478             c->pix_abs[1][3] = sad8_xy2_mmxext;
 479         }
 480     }
 481     if (INLINE_SSE2(cpu_flags) && !(cpu_flags & AV_CPU_FLAG_3DNOW) && avctx->codec_id != AV_CODEC_ID_SNOW) {
 482         c->sad[0] = sad16_sse2;
 483     }
 484 #endif /* HAVE_INLINE_ASM */
 485 }