1/* 2 * idct_mmx.c 3 * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> 4 * 5 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. 6 * See http://libmpeg2.sourceforge.net/ for updates. 7 * 8 * mpeg2dec is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * mpeg2dec 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 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with mpeg2dec; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "libavutil/common.h" 24#include "libavcodec/dsputil.h" 25 26#include "mmx.h" 27 28#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align))) 29 30#define ROW_SHIFT 11 31#define COL_SHIFT 6 32 33#define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT))) 34#define rounder(bias) {round (bias), round (bias)} 35 36 37#if 0 38/* C row IDCT - it is just here to document the MMXEXT and MMX versions */ 39static inline void idct_row (int16_t * row, int offset, 40 int16_t * table, int32_t * rounder) 41{ 42 int C1, C2, C3, C4, C5, C6, C7; 43 int a0, a1, a2, a3, b0, b1, b2, b3; 44 45 row += offset; 46 47 C1 = table[1]; 48 C2 = table[2]; 49 C3 = table[3]; 50 C4 = table[4]; 51 C5 = table[5]; 52 C6 = table[6]; 53 C7 = table[7]; 54 55 a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder; 56 a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder; 57 a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder; 58 a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder; 59 60 b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7]; 61 b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7]; 62 b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7]; 63 b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7]; 64 65 row[0] = (a0 + b0) >> ROW_SHIFT; 66 row[1] = (a1 + b1) >> ROW_SHIFT; 67 row[2] = (a2 + b2) >> ROW_SHIFT; 68 row[3] = (a3 + b3) >> ROW_SHIFT; 69 row[4] = (a3 - b3) >> ROW_SHIFT; 70 row[5] = (a2 - b2) >> ROW_SHIFT; 71 row[6] = (a1 - b1) >> ROW_SHIFT; 72 row[7] = (a0 - b0) >> ROW_SHIFT; 73} 74#endif 75 76 77/* MMXEXT row IDCT */ 78 79#define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \ 80 c4, c6, c4, c6, \ 81 c1, c3, -c1, -c5, \ 82 c5, c7, c3, -c7, \ 83 c4, -c6, c4, -c6, \ 84 -c4, c2, c4, -c2, \ 85 c5, -c1, c3, -c1, \ 86 c7, c3, c7, -c5 } 87 88static inline void mmxext_row_head (int16_t * const row, const int offset, 89 const int16_t * const table) 90{ 91 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ 92 93 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */ 94 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */ 95 96 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */ 97 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */ 98 99 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */ 100 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */ 101 102 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */ 103} 104 105static inline void mmxext_row (const int16_t * const table, 106 const int32_t * const rounder) 107{ 108 movq_m2r (*(table+8), mm1); /* mm1 = -C5 -C1 C3 C1 */ 109 pmaddwd_r2r (mm2, mm4); /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */ 110 111 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x4-C6*x6 C4*x0-C6*x2 */ 112 pshufw_r2r (mm6, mm6, 0x4e); /* mm6 = x3 x1 x7 x5 */ 113 114 movq_m2r (*(table+12), mm7); /* mm7 = -C7 C3 C7 C5 */ 115 pmaddwd_r2r (mm5, mm1); /* mm1 = -C1*x5-C5*x7 C1*x1+C3*x3 */ 116 117 paddd_m2r (*rounder, mm3); /* mm3 += rounder */ 118 pmaddwd_r2r (mm6, mm7); /* mm7 = C3*x1-C7*x3 C5*x5+C7*x7 */ 119 120 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x0-C2*x2 -C4*x4+C2*x6 */ 121 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */ 122 123 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C3*x5-C1*x7 C5*x1-C1*x3 */ 124 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */ 125 126 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C7*x1-C5*x3 C7*x5+C3*x7 */ 127 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */ 128 129 paddd_m2r (*rounder, mm0); /* mm0 += rounder */ 130 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */ 131 132 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */ 133 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */ 134 135 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */ 136 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */ 137 138 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */ 139 movq_r2r (mm0, mm4); /* mm4 = a3 a2 + rounder */ 140 141 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */ 142 psubd_r2r (mm5, mm4); /* mm4 = a3-b3 a2-b2 + rounder */ 143} 144 145static inline void mmxext_row_tail (int16_t * const row, const int store) 146{ 147 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ 148 149 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */ 150 151 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */ 152 153 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */ 154 155 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */ 156 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */ 157 158 /* slot */ 159 160 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */ 161} 162 163static inline void mmxext_row_mid (int16_t * const row, const int store, 164 const int offset, 165 const int16_t * const table) 166{ 167 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ 168 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ 169 170 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */ 171 psrad_i2r (ROW_SHIFT, mm4); /* mm4 = y4 y5 */ 172 173 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */ 174 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */ 175 176 packssdw_r2r (mm3, mm4); /* mm4 = y6 y7 y4 y5 */ 177 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */ 178 179 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */ 180 pshufw_r2r (mm4, mm4, 0xb1); /* mm4 = y7 y6 y5 y4 */ 181 182 movq_m2r (*table, mm3); /* mm3 = -C2 -C4 C2 C4 */ 183 movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */ 184 185 pmaddwd_r2r (mm0, mm3); /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */ 186 187 movq_m2r (*(table+4), mm4); /* mm4 = C6 C4 C6 C4 */ 188 pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */ 189} 190 191 192/* MMX row IDCT */ 193 194#define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \ 195 c4, c6, -c4, -c2, \ 196 c1, c3, c3, -c7, \ 197 c5, c7, -c1, -c5, \ 198 c4, -c6, c4, -c2, \ 199 -c4, c2, c4, -c6, \ 200 c5, -c1, c7, -c5, \ 201 c7, c3, c3, -c1 } 202 203static inline void mmx_row_head (int16_t * const row, const int offset, 204 const int16_t * const table) 205{ 206 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ 207 208 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */ 209 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */ 210 211 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */ 212 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */ 213 214 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */ 215 216 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */ 217 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */ 218 219 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */ 220 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */ 221} 222 223static inline void mmx_row (const int16_t * const table, 224 const int32_t * const rounder) 225{ 226 pmaddwd_r2r (mm2, mm4); /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */ 227 punpckldq_r2r (mm5, mm5); /* mm5 = x3 x1 x3 x1 */ 228 229 pmaddwd_m2r (*(table+16), mm0); /* mm0 = C4*x0-C2*x2 C4*x0-C6*x2 */ 230 punpckhdq_r2r (mm6, mm6); /* mm6 = x7 x5 x7 x5 */ 231 232 movq_m2r (*(table+12), mm7); /* mm7 = -C5 -C1 C7 C5 */ 233 pmaddwd_r2r (mm5, mm1); /* mm1 = C3*x1-C7*x3 C1*x1+C3*x3 */ 234 235 paddd_m2r (*rounder, mm3); /* mm3 += rounder */ 236 pmaddwd_r2r (mm6, mm7); /* mm7 = -C1*x5-C5*x7 C5*x5+C7*x7 */ 237 238 pmaddwd_m2r (*(table+20), mm2); /* mm2 = C4*x4-C6*x6 -C4*x4+C2*x6 */ 239 paddd_r2r (mm4, mm3); /* mm3 = a1 a0 + rounder */ 240 241 pmaddwd_m2r (*(table+24), mm5); /* mm5 = C7*x1-C5*x3 C5*x1-C1*x3 */ 242 movq_r2r (mm3, mm4); /* mm4 = a1 a0 + rounder */ 243 244 pmaddwd_m2r (*(table+28), mm6); /* mm6 = C3*x5-C1*x7 C7*x5+C3*x7 */ 245 paddd_r2r (mm7, mm1); /* mm1 = b1 b0 */ 246 247 paddd_m2r (*rounder, mm0); /* mm0 += rounder */ 248 psubd_r2r (mm1, mm3); /* mm3 = a1-b1 a0-b0 + rounder */ 249 250 psrad_i2r (ROW_SHIFT, mm3); /* mm3 = y6 y7 */ 251 paddd_r2r (mm4, mm1); /* mm1 = a1+b1 a0+b0 + rounder */ 252 253 paddd_r2r (mm2, mm0); /* mm0 = a3 a2 + rounder */ 254 psrad_i2r (ROW_SHIFT, mm1); /* mm1 = y1 y0 */ 255 256 paddd_r2r (mm6, mm5); /* mm5 = b3 b2 */ 257 movq_r2r (mm0, mm7); /* mm7 = a3 a2 + rounder */ 258 259 paddd_r2r (mm5, mm0); /* mm0 = a3+b3 a2+b2 + rounder */ 260 psubd_r2r (mm5, mm7); /* mm7 = a3-b3 a2-b2 + rounder */ 261} 262 263static inline void mmx_row_tail (int16_t * const row, const int store) 264{ 265 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ 266 267 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */ 268 269 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */ 270 271 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */ 272 273 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */ 274 movq_r2r (mm7, mm4); /* mm4 = y6 y7 y4 y5 */ 275 276 pslld_i2r (16, mm7); /* mm7 = y7 0 y5 0 */ 277 278 psrld_i2r (16, mm4); /* mm4 = 0 y6 0 y4 */ 279 280 por_r2r (mm4, mm7); /* mm7 = y7 y6 y5 y4 */ 281 282 /* slot */ 283 284 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */ 285} 286 287static inline void mmx_row_mid (int16_t * const row, const int store, 288 const int offset, const int16_t * const table) 289{ 290 movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ 291 psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ 292 293 movq_m2r (*(row+offset+4), mm5); /* mm5 = x7 x5 x3 x1 */ 294 psrad_i2r (ROW_SHIFT, mm7); /* mm7 = y4 y5 */ 295 296 packssdw_r2r (mm0, mm1); /* mm1 = y3 y2 y1 y0 */ 297 movq_r2r (mm5, mm6); /* mm6 = x7 x5 x3 x1 */ 298 299 packssdw_r2r (mm3, mm7); /* mm7 = y6 y7 y4 y5 */ 300 movq_r2r (mm2, mm0); /* mm0 = x6 x4 x2 x0 */ 301 302 movq_r2m (mm1, *(row+store)); /* save y3 y2 y1 y0 */ 303 movq_r2r (mm7, mm1); /* mm1 = y6 y7 y4 y5 */ 304 305 punpckldq_r2r (mm0, mm0); /* mm0 = x2 x0 x2 x0 */ 306 psrld_i2r (16, mm7); /* mm7 = 0 y6 0 y4 */ 307 308 movq_m2r (*table, mm3); /* mm3 = C6 C4 C2 C4 */ 309 pslld_i2r (16, mm1); /* mm1 = y7 0 y5 0 */ 310 311 movq_m2r (*(table+4), mm4); /* mm4 = -C2 -C4 C6 C4 */ 312 por_r2r (mm1, mm7); /* mm7 = y7 y6 y5 y4 */ 313 314 movq_m2r (*(table+8), mm1); /* mm1 = -C7 C3 C3 C1 */ 315 punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */ 316 317 movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */ 318 pmaddwd_r2r (mm0, mm3); /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */ 319} 320 321 322#if 0 323/* C column IDCT - it is just here to document the MMXEXT and MMX versions */ 324static inline void idct_col (int16_t * col, int offset) 325{ 326/* multiplication - as implemented on mmx */ 327#define F(c,x) (((c) * (x)) >> 16) 328 329/* saturation - it helps us handle torture test cases */ 330#define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x)) 331 332 int16_t x0, x1, x2, x3, x4, x5, x6, x7; 333 int16_t y0, y1, y2, y3, y4, y5, y6, y7; 334 int16_t a0, a1, a2, a3, b0, b1, b2, b3; 335 int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12; 336 337 col += offset; 338 339 x0 = col[0*8]; 340 x1 = col[1*8]; 341 x2 = col[2*8]; 342 x3 = col[3*8]; 343 x4 = col[4*8]; 344 x5 = col[5*8]; 345 x6 = col[6*8]; 346 x7 = col[7*8]; 347 348 u04 = S (x0 + x4); 349 v04 = S (x0 - x4); 350 u26 = S (F (T2, x6) + x2); 351 v26 = S (F (T2, x2) - x6); 352 353 a0 = S (u04 + u26); 354 a1 = S (v04 + v26); 355 a2 = S (v04 - v26); 356 a3 = S (u04 - u26); 357 358 u17 = S (F (T1, x7) + x1); 359 v17 = S (F (T1, x1) - x7); 360 u35 = S (F (T3, x5) + x3); 361 v35 = S (F (T3, x3) - x5); 362 363 b0 = S (u17 + u35); 364 b3 = S (v17 - v35); 365 u12 = S (u17 - u35); 366 v12 = S (v17 + v35); 367 u12 = S (2 * F (C4, u12)); 368 v12 = S (2 * F (C4, v12)); 369 b1 = S (u12 + v12); 370 b2 = S (u12 - v12); 371 372 y0 = S (a0 + b0) >> COL_SHIFT; 373 y1 = S (a1 + b1) >> COL_SHIFT; 374 y2 = S (a2 + b2) >> COL_SHIFT; 375 y3 = S (a3 + b3) >> COL_SHIFT; 376 377 y4 = S (a3 - b3) >> COL_SHIFT; 378 y5 = S (a2 - b2) >> COL_SHIFT; 379 y6 = S (a1 - b1) >> COL_SHIFT; 380 y7 = S (a0 - b0) >> COL_SHIFT; 381 382 col[0*8] = y0; 383 col[1*8] = y1; 384 col[2*8] = y2; 385 col[3*8] = y3; 386 col[4*8] = y4; 387 col[5*8] = y5; 388 col[6*8] = y6; 389 col[7*8] = y7; 390} 391#endif 392 393 394/* MMX column IDCT */ 395static inline void idct_col (int16_t * const col, const int offset) 396{ 397#define T1 13036 398#define T2 27146 399#define T3 43790 400#define C4 23170 401 402 static const short t1_vector[] ATTR_ALIGN(8) = {T1,T1,T1,T1}; 403 static const short t2_vector[] ATTR_ALIGN(8) = {T2,T2,T2,T2}; 404 static const short t3_vector[] ATTR_ALIGN(8) = {T3,T3,T3,T3}; 405 static const short c4_vector[] ATTR_ALIGN(8) = {C4,C4,C4,C4}; 406 407 /* column code adapted from Peter Gubanov */ 408 /* http://www.elecard.com/peter/idct.shtml */ 409 410 movq_m2r (*t1_vector, mm0); /* mm0 = T1 */ 411 412 movq_m2r (*(col+offset+1*8), mm1); /* mm1 = x1 */ 413 movq_r2r (mm0, mm2); /* mm2 = T1 */ 414 415 movq_m2r (*(col+offset+7*8), mm4); /* mm4 = x7 */ 416 pmulhw_r2r (mm1, mm0); /* mm0 = T1*x1 */ 417 418 movq_m2r (*t3_vector, mm5); /* mm5 = T3 */ 419 pmulhw_r2r (mm4, mm2); /* mm2 = T1*x7 */ 420 421 movq_m2r (*(col+offset+5*8), mm6); /* mm6 = x5 */ 422 movq_r2r (mm5, mm7); /* mm7 = T3-1 */ 423 424 movq_m2r (*(col+offset+3*8), mm3); /* mm3 = x3 */ 425 psubsw_r2r (mm4, mm0); /* mm0 = v17 */ 426 427 movq_m2r (*t2_vector, mm4); /* mm4 = T2 */ 428 pmulhw_r2r (mm3, mm5); /* mm5 = (T3-1)*x3 */ 429 430 paddsw_r2r (mm2, mm1); /* mm1 = u17 */ 431 pmulhw_r2r (mm6, mm7); /* mm7 = (T3-1)*x5 */ 432 433 /* slot */ 434 435 movq_r2r (mm4, mm2); /* mm2 = T2 */ 436 paddsw_r2r (mm3, mm5); /* mm5 = T3*x3 */ 437 438 pmulhw_m2r (*(col+offset+2*8), mm4);/* mm4 = T2*x2 */ 439 paddsw_r2r (mm6, mm7); /* mm7 = T3*x5 */ 440 441 psubsw_r2r (mm6, mm5); /* mm5 = v35 */ 442 paddsw_r2r (mm3, mm7); /* mm7 = u35 */ 443 444 movq_m2r (*(col+offset+6*8), mm3); /* mm3 = x6 */ 445 movq_r2r (mm0, mm6); /* mm6 = v17 */ 446 447 pmulhw_r2r (mm3, mm2); /* mm2 = T2*x6 */ 448 psubsw_r2r (mm5, mm0); /* mm0 = b3 */ 449 450 psubsw_r2r (mm3, mm4); /* mm4 = v26 */ 451 paddsw_r2r (mm6, mm5); /* mm5 = v12 */ 452 453 movq_r2m (mm0, *(col+offset+3*8)); /* save b3 in scratch0 */ 454 movq_r2r (mm1, mm6); /* mm6 = u17 */ 455 456 paddsw_m2r (*(col+offset+2*8), mm2);/* mm2 = u26 */ 457 paddsw_r2r (mm7, mm6); /* mm6 = b0 */ 458 459 psubsw_r2r (mm7, mm1); /* mm1 = u12 */ 460 movq_r2r (mm1, mm7); /* mm7 = u12 */ 461 462 movq_m2r (*(col+offset+0*8), mm3); /* mm3 = x0 */ 463 paddsw_r2r (mm5, mm1); /* mm1 = u12+v12 */ 464 465 movq_m2r (*c4_vector, mm0); /* mm0 = C4/2 */ 466 psubsw_r2r (mm5, mm7); /* mm7 = u12-v12 */ 467 468 movq_r2m (mm6, *(col+offset+5*8)); /* save b0 in scratch1 */ 469 pmulhw_r2r (mm0, mm1); /* mm1 = b1/2 */ 470 471 movq_r2r (mm4, mm6); /* mm6 = v26 */ 472 pmulhw_r2r (mm0, mm7); /* mm7 = b2/2 */ 473 474 movq_m2r (*(col+offset+4*8), mm5); /* mm5 = x4 */ 475 movq_r2r (mm3, mm0); /* mm0 = x0 */ 476 477 psubsw_r2r (mm5, mm3); /* mm3 = v04 */ 478 paddsw_r2r (mm5, mm0); /* mm0 = u04 */ 479 480 paddsw_r2r (mm3, mm4); /* mm4 = a1 */ 481 movq_r2r (mm0, mm5); /* mm5 = u04 */ 482 483 psubsw_r2r (mm6, mm3); /* mm3 = a2 */ 484 paddsw_r2r (mm2, mm5); /* mm5 = a0 */ 485 486 paddsw_r2r (mm1, mm1); /* mm1 = b1 */ 487 psubsw_r2r (mm2, mm0); /* mm0 = a3 */ 488 489 paddsw_r2r (mm7, mm7); /* mm7 = b2 */ 490 movq_r2r (mm3, mm2); /* mm2 = a2 */ 491 492 movq_r2r (mm4, mm6); /* mm6 = a1 */ 493 paddsw_r2r (mm7, mm3); /* mm3 = a2+b2 */ 494 495 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y2 */ 496 paddsw_r2r (mm1, mm4); /* mm4 = a1+b1 */ 497 498 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y1 */ 499 psubsw_r2r (mm1, mm6); /* mm6 = a1-b1 */ 500 501 movq_m2r (*(col+offset+5*8), mm1); /* mm1 = b0 */ 502 psubsw_r2r (mm7, mm2); /* mm2 = a2-b2 */ 503 504 psraw_i2r (COL_SHIFT, mm6); /* mm6 = y6 */ 505 movq_r2r (mm5, mm7); /* mm7 = a0 */ 506 507 movq_r2m (mm4, *(col+offset+1*8)); /* save y1 */ 508 psraw_i2r (COL_SHIFT, mm2); /* mm2 = y5 */ 509 510 movq_r2m (mm3, *(col+offset+2*8)); /* save y2 */ 511 paddsw_r2r (mm1, mm5); /* mm5 = a0+b0 */ 512 513 movq_m2r (*(col+offset+3*8), mm4); /* mm4 = b3 */ 514 psubsw_r2r (mm1, mm7); /* mm7 = a0-b0 */ 515 516 psraw_i2r (COL_SHIFT, mm5); /* mm5 = y0 */ 517 movq_r2r (mm0, mm3); /* mm3 = a3 */ 518 519 movq_r2m (mm2, *(col+offset+5*8)); /* save y5 */ 520 psubsw_r2r (mm4, mm3); /* mm3 = a3-b3 */ 521 522 psraw_i2r (COL_SHIFT, mm7); /* mm7 = y7 */ 523 paddsw_r2r (mm0, mm4); /* mm4 = a3+b3 */ 524 525 movq_r2m (mm5, *(col+offset+0*8)); /* save y0 */ 526 psraw_i2r (COL_SHIFT, mm3); /* mm3 = y4 */ 527 528 movq_r2m (mm6, *(col+offset+6*8)); /* save y6 */ 529 psraw_i2r (COL_SHIFT, mm4); /* mm4 = y3 */ 530 531 movq_r2m (mm7, *(col+offset+7*8)); /* save y7 */ 532 533 movq_r2m (mm3, *(col+offset+4*8)); /* save y4 */ 534 535 movq_r2m (mm4, *(col+offset+3*8)); /* save y3 */ 536 537#undef T1 538#undef T2 539#undef T3 540#undef C4 541} 542 543 544static const int32_t rounder0[] ATTR_ALIGN(8) = 545 rounder ((1 << (COL_SHIFT - 1)) - 0.5); 546static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0); 547static const int32_t rounder1[] ATTR_ALIGN(8) = 548 rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */ 549static const int32_t rounder7[] ATTR_ALIGN(8) = 550 rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */ 551static const int32_t rounder2[] ATTR_ALIGN(8) = 552 rounder (0.60355339059); /* C2 * (C6+C2)/2 */ 553static const int32_t rounder6[] ATTR_ALIGN(8) = 554 rounder (-0.25); /* C2 * (C6-C2)/2 */ 555static const int32_t rounder3[] ATTR_ALIGN(8) = 556 rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */ 557static const int32_t rounder5[] ATTR_ALIGN(8) = 558 rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */ 559 560#undef COL_SHIFT 561#undef ROW_SHIFT 562 563#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \ 564void idct (int16_t * const block) \ 565{ \ 566 static const int16_t table04[] ATTR_ALIGN(16) = \ 567 table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \ 568 static const int16_t table17[] ATTR_ALIGN(16) = \ 569 table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \ 570 static const int16_t table26[] ATTR_ALIGN(16) = \ 571 table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \ 572 static const int16_t table35[] ATTR_ALIGN(16) = \ 573 table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \ 574 \ 575 idct_row_head (block, 0*8, table04); \ 576 idct_row (table04, rounder0); \ 577 idct_row_mid (block, 0*8, 4*8, table04); \ 578 idct_row (table04, rounder4); \ 579 idct_row_mid (block, 4*8, 1*8, table17); \ 580 idct_row (table17, rounder1); \ 581 idct_row_mid (block, 1*8, 7*8, table17); \ 582 idct_row (table17, rounder7); \ 583 idct_row_mid (block, 7*8, 2*8, table26); \ 584 idct_row (table26, rounder2); \ 585 idct_row_mid (block, 2*8, 6*8, table26); \ 586 idct_row (table26, rounder6); \ 587 idct_row_mid (block, 6*8, 3*8, table35); \ 588 idct_row (table35, rounder3); \ 589 idct_row_mid (block, 3*8, 5*8, table35); \ 590 idct_row (table35, rounder5); \ 591 idct_row_tail (block, 5*8); \ 592 \ 593 idct_col (block, 0); \ 594 idct_col (block, 4); \ 595} 596 597void ff_mmx_idct(DCTELEM *block); 598void ff_mmxext_idct(DCTELEM *block); 599 600declare_idct (ff_mmxext_idct, mmxext_table, 601 mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid) 602 603declare_idct (ff_mmx_idct, mmx_table, 604 mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid) 605 606