1/* 2 * XVID MPEG-4 VIDEO CODEC 3 * - MMX and XMM forward discrete cosine transform - 4 * 5 * Copyright(C) 2001 Peter Ross <pross@xvid.org> 6 * 7 * Originally provided by Intel at AP-922 8 * http://developer.intel.com/vtune/cbts/strmsimd/922down.htm 9 * (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm) 10 * but in a limited edition. 11 * New macro implements a column part for precise iDCT 12 * The routine precision now satisfies IEEE standard 1180-1990. 13 * 14 * Copyright(C) 2000-2001 Peter Gubanov <peter@elecard.net.ru> 15 * Rounding trick Copyright(C) 2000 Michel Lespinasse <walken@zoy.org> 16 * 17 * http://www.elecard.com/peter/idct.html 18 * http://www.linuxvideo.org/mpeg2dec/ 19 * 20 * These examples contain code fragments for first stage iDCT 8x8 21 * (for rows) and first stage DCT 8x8 (for columns) 22 * 23 * conversion to gcc syntax by Michael Niedermayer 24 * 25 * This file is part of FFmpeg. 26 * 27 * FFmpeg is free software; you can redistribute it and/or 28 * modify it under the terms of the GNU Lesser General Public 29 * License as published by the Free Software Foundation; either 30 * version 2.1 of the License, or (at your option) any later version. 31 * 32 * FFmpeg is distributed in the hope that it will be useful, 33 * but WITHOUT ANY WARRANTY; without even the implied warranty of 34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 35 * Lesser General Public License for more details. 36 * 37 * You should have received a copy of the GNU Lesser General Public License 38 * along with FFmpeg; if not, write to the Free Software Foundation, 39 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 40 */ 41 42#include <inttypes.h> 43 44#include "config.h" 45#include "libavcodec/avcodec.h" 46#include "libavutil/mem.h" 47#include "idct_xvid.h" 48#include "idctdsp.h" 49 50#if HAVE_MMX_INLINE 51 52//============================================================================= 53// Macros and other preprocessor constants 54//============================================================================= 55 56#define BITS_INV_ACC 5 // 4 or 5 for IEEE 57#define SHIFT_INV_ROW (16 - BITS_INV_ACC) //11 58#define SHIFT_INV_COL (1 + BITS_INV_ACC) //6 59#define RND_INV_ROW (1024 * (6 - BITS_INV_ACC)) 60#define RND_INV_COL (16 * (BITS_INV_ACC - 3)) 61#define RND_INV_CORR (RND_INV_COL - 1) 62 63#define BITS_FRW_ACC 3 // 2 or 3 for accuracy 64#define SHIFT_FRW_COL BITS_FRW_ACC 65#define SHIFT_FRW_ROW (BITS_FRW_ACC + 17) 66#define RND_FRW_ROW (262144*(BITS_FRW_ACC - 1)) 67 68 69//----------------------------------------------------------------------------- 70// Various memory constants (trigonometric values or rounding values) 71//----------------------------------------------------------------------------- 72 73 74DECLARE_ALIGNED(8, static const int16_t, tg_1_16)[4*4] = { 75 13036,13036,13036,13036, // tg * (2<<16) + 0.5 76 27146,27146,27146,27146, // tg * (2<<16) + 0.5 77 -21746,-21746,-21746,-21746, // tg * (2<<16) + 0.5 78 23170,23170,23170,23170}; // cos * (2<<15) + 0.5 79 80DECLARE_ALIGNED(8, static const int32_t, rounder_0)[2*8] = { 81 65536,65536, 82 3597,3597, 83 2260,2260, 84 1203,1203, 85 0,0, 86 120,120, 87 512,512, 88 512,512}; 89 90//----------------------------------------------------------------------------- 91// 92// The first stage iDCT 8x8 - inverse DCTs of rows 93// 94//----------------------------------------------------------------------------- 95// The 8-point inverse DCT direct algorithm 96//----------------------------------------------------------------------------- 97// 98// static const short w[32] = { 99// FIX(cos_4_16), FIX(cos_2_16), FIX(cos_4_16), FIX(cos_6_16), 100// FIX(cos_4_16), FIX(cos_6_16), -FIX(cos_4_16), -FIX(cos_2_16), 101// FIX(cos_4_16), -FIX(cos_6_16), -FIX(cos_4_16), FIX(cos_2_16), 102// FIX(cos_4_16), -FIX(cos_2_16), FIX(cos_4_16), -FIX(cos_6_16), 103// FIX(cos_1_16), FIX(cos_3_16), FIX(cos_5_16), FIX(cos_7_16), 104// FIX(cos_3_16), -FIX(cos_7_16), -FIX(cos_1_16), -FIX(cos_5_16), 105// FIX(cos_5_16), -FIX(cos_1_16), FIX(cos_7_16), FIX(cos_3_16), 106// FIX(cos_7_16), -FIX(cos_5_16), FIX(cos_3_16), -FIX(cos_1_16) }; 107// 108// #define DCT_8_INV_ROW(x, y) 109// { 110// int a0, a1, a2, a3, b0, b1, b2, b3; 111// 112// a0 =x[0]*w[0]+x[2]*w[1]+x[4]*w[2]+x[6]*w[3]; 113// a1 =x[0]*w[4]+x[2]*w[5]+x[4]*w[6]+x[6]*w[7]; 114// a2 = x[0] * w[ 8] + x[2] * w[ 9] + x[4] * w[10] + x[6] * w[11]; 115// a3 = x[0] * w[12] + x[2] * w[13] + x[4] * w[14] + x[6] * w[15]; 116// b0 = x[1] * w[16] + x[3] * w[17] + x[5] * w[18] + x[7] * w[19]; 117// b1 = x[1] * w[20] + x[3] * w[21] + x[5] * w[22] + x[7] * w[23]; 118// b2 = x[1] * w[24] + x[3] * w[25] + x[5] * w[26] + x[7] * w[27]; 119// b3 = x[1] * w[28] + x[3] * w[29] + x[5] * w[30] + x[7] * w[31]; 120// 121// y[0] = SHIFT_ROUND ( a0 + b0 ); 122// y[1] = SHIFT_ROUND ( a1 + b1 ); 123// y[2] = SHIFT_ROUND ( a2 + b2 ); 124// y[3] = SHIFT_ROUND ( a3 + b3 ); 125// y[4] = SHIFT_ROUND ( a3 - b3 ); 126// y[5] = SHIFT_ROUND ( a2 - b2 ); 127// y[6] = SHIFT_ROUND ( a1 - b1 ); 128// y[7] = SHIFT_ROUND ( a0 - b0 ); 129// } 130// 131//----------------------------------------------------------------------------- 132// 133// In this implementation the outputs of the iDCT-1D are multiplied 134// for rows 0,4 - by cos_4_16, 135// for rows 1,7 - by cos_1_16, 136// for rows 2,6 - by cos_2_16, 137// for rows 3,5 - by cos_3_16 138// and are shifted to the left for better accuracy 139// 140// For the constants used, 141// FIX(float_const) = (short) (float_const * (1<<15) + 0.5) 142// 143//----------------------------------------------------------------------------- 144 145//----------------------------------------------------------------------------- 146// Tables for mmx processors 147//----------------------------------------------------------------------------- 148 149// Table for rows 0,4 - constants are multiplied by cos_4_16 150DECLARE_ALIGNED(8, static const int16_t, tab_i_04_mmx)[32*4] = { 151 16384,16384,16384,-16384, // movq-> w06 w04 w02 w00 152 21407,8867,8867,-21407, // w07 w05 w03 w01 153 16384,-16384,16384,16384, // w14 w12 w10 w08 154 -8867,21407,-21407,-8867, // w15 w13 w11 w09 155 22725,12873,19266,-22725, // w22 w20 w18 w16 156 19266,4520,-4520,-12873, // w23 w21 w19 w17 157 12873,4520,4520,19266, // w30 w28 w26 w24 158 -22725,19266,-12873,-22725, // w31 w29 w27 w25 159// Table for rows 1,7 - constants are multiplied by cos_1_16 160 22725,22725,22725,-22725, // movq-> w06 w04 w02 w00 161 29692,12299,12299,-29692, // w07 w05 w03 w01 162 22725,-22725,22725,22725, // w14 w12 w10 w08 163 -12299,29692,-29692,-12299, // w15 w13 w11 w09 164 31521,17855,26722,-31521, // w22 w20 w18 w16 165 26722,6270,-6270,-17855, // w23 w21 w19 w17 166 17855,6270,6270,26722, // w30 w28 w26 w24 167 -31521,26722,-17855,-31521, // w31 w29 w27 w25 168// Table for rows 2,6 - constants are multiplied by cos_2_16 169 21407,21407,21407,-21407, // movq-> w06 w04 w02 w00 170 27969,11585,11585,-27969, // w07 w05 w03 w01 171 21407,-21407,21407,21407, // w14 w12 w10 w08 172 -11585,27969,-27969,-11585, // w15 w13 w11 w09 173 29692,16819,25172,-29692, // w22 w20 w18 w16 174 25172,5906,-5906,-16819, // w23 w21 w19 w17 175 16819,5906,5906,25172, // w30 w28 w26 w24 176 -29692,25172,-16819,-29692, // w31 w29 w27 w25 177// Table for rows 3,5 - constants are multiplied by cos_3_16 178 19266,19266,19266,-19266, // movq-> w06 w04 w02 w00 179 25172,10426,10426,-25172, // w07 w05 w03 w01 180 19266,-19266,19266,19266, // w14 w12 w10 w08 181 -10426,25172,-25172,-10426, // w15 w13 w11 w09 182 26722,15137,22654,-26722, // w22 w20 w18 w16 183 22654,5315,-5315,-15137, // w23 w21 w19 w17 184 15137,5315,5315,22654, // w30 w28 w26 w24 185 -26722,22654,-15137,-26722, // w31 w29 w27 w25 186}; 187//----------------------------------------------------------------------------- 188// Tables for xmm processors 189//----------------------------------------------------------------------------- 190 191// %3 for rows 0,4 - constants are multiplied by cos_4_16 192DECLARE_ALIGNED(8, static const int16_t, tab_i_04_xmm)[32*4] = { 193 16384,21407,16384,8867, // movq-> w05 w04 w01 w00 194 16384,8867,-16384,-21407, // w07 w06 w03 w02 195 16384,-8867,16384,-21407, // w13 w12 w09 w08 196 -16384,21407,16384,-8867, // w15 w14 w11 w10 197 22725,19266,19266,-4520, // w21 w20 w17 w16 198 12873,4520,-22725,-12873, // w23 w22 w19 w18 199 12873,-22725,4520,-12873, // w29 w28 w25 w24 200 4520,19266,19266,-22725, // w31 w30 w27 w26 201// %3 for rows 1,7 - constants are multiplied by cos_1_16 202 22725,29692,22725,12299, // movq-> w05 w04 w01 w00 203 22725,12299,-22725,-29692, // w07 w06 w03 w02 204 22725,-12299,22725,-29692, // w13 w12 w09 w08 205 -22725,29692,22725,-12299, // w15 w14 w11 w10 206 31521,26722,26722,-6270, // w21 w20 w17 w16 207 17855,6270,-31521,-17855, // w23 w22 w19 w18 208 17855,-31521,6270,-17855, // w29 w28 w25 w24 209 6270,26722,26722,-31521, // w31 w30 w27 w26 210// %3 for rows 2,6 - constants are multiplied by cos_2_16 211 21407,27969,21407,11585, // movq-> w05 w04 w01 w00 212 21407,11585,-21407,-27969, // w07 w06 w03 w02 213 21407,-11585,21407,-27969, // w13 w12 w09 w08 214 -21407,27969,21407,-11585, // w15 w14 w11 w10 215 29692,25172,25172,-5906, // w21 w20 w17 w16 216 16819,5906,-29692,-16819, // w23 w22 w19 w18 217 16819,-29692,5906,-16819, // w29 w28 w25 w24 218 5906,25172,25172,-29692, // w31 w30 w27 w26 219// %3 for rows 3,5 - constants are multiplied by cos_3_16 220 19266,25172,19266,10426, // movq-> w05 w04 w01 w00 221 19266,10426,-19266,-25172, // w07 w06 w03 w02 222 19266,-10426,19266,-25172, // w13 w12 w09 w08 223 -19266,25172,19266,-10426, // w15 w14 w11 w10 224 26722,22654,22654,-5315, // w21 w20 w17 w16 225 15137,5315,-26722,-15137, // w23 w22 w19 w18 226 15137,-26722,5315,-15137, // w29 w28 w25 w24 227 5315,22654,22654,-26722, // w31 w30 w27 w26 228}; 229//============================================================================= 230// Helper macros for the code 231//============================================================================= 232 233//----------------------------------------------------------------------------- 234// DCT_8_INV_ROW_MMX( INP, OUT, TABLE, ROUNDER 235//----------------------------------------------------------------------------- 236 237#define DCT_8_INV_ROW_MMX(A1,A2,A3,A4)\ 238 "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\ 239 "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\ 240 "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\ 241 "movq " #A3 ",%%mm3 \n\t"/* 3 ; w06 w04 w02 w00*/\ 242 "punpcklwd %%mm1,%%mm0 \n\t"/* x5 x1 x4 x0*/\ 243 "movq %%mm0,%%mm5 \n\t"/* 5 ; x5 x1 x4 x0*/\ 244 "punpckldq %%mm0,%%mm0 \n\t"/* x4 x0 x4 x0*/\ 245 "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w05 w03 w01*/\ 246 "punpckhwd %%mm1,%%mm2 \n\t"/* 1 ; x7 x3 x6 x2*/\ 247 "pmaddwd %%mm0,%%mm3 \n\t"/* x4*w06+x0*w04 x4*w02+x0*w00*/\ 248 "movq %%mm2,%%mm6 \n\t"/* 6 ; x7 x3 x6 x2*/\ 249 "movq 32+" #A3 ",%%mm1 \n\t"/* 1 ; w22 w20 w18 w16*/\ 250 "punpckldq %%mm2,%%mm2 \n\t"/* x6 x2 x6 x2*/\ 251 "pmaddwd %%mm2,%%mm4 \n\t"/* x6*w07+x2*w05 x6*w03+x2*w01*/\ 252 "punpckhdq %%mm5,%%mm5 \n\t"/* x5 x1 x5 x1*/\ 253 "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x4*w14+x0*w12 x4*w10+x0*w08*/\ 254 "punpckhdq %%mm6,%%mm6 \n\t"/* x7 x3 x7 x3*/\ 255 "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w21 w19 w17*/\ 256 "pmaddwd %%mm5,%%mm1 \n\t"/* x5*w22+x1*w20 x5*w18+x1*w16*/\ 257 "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\ 258 "pmaddwd %%mm6,%%mm7 \n\t"/* x7*w23+x3*w21 x7*w19+x3*w17*/\ 259 "pmaddwd 24+" #A3 ",%%mm2 \n\t"/* x6*w15+x2*w13 x6*w11+x2*w09*/\ 260 "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\ 261 "pmaddwd 48+" #A3 ",%%mm5 \n\t"/* x5*w30+x1*w28 x5*w26+x1*w24*/\ 262 "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\ 263 "pmaddwd 56+" #A3 ",%%mm6 \n\t"/* x7*w31+x3*w29 x7*w27+x3*w25*/\ 264 "paddd %%mm7,%%mm1 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\ 265 "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\ 266 "psubd %%mm1,%%mm3 \n\t"/* a1-b1 a0-b0*/\ 267 "psrad $11,%%mm3 \n\t"/* y6=a1-b1 y7=a0-b0*/\ 268 "paddd %%mm4,%%mm1 \n\t"/* 4 ; a1+b1 a0+b0*/\ 269 "paddd %%mm2,%%mm0 \n\t"/* 2 ; a3=sum(even3) a2=sum(even2)*/\ 270 "psrad $11,%%mm1 \n\t"/* y1=a1+b1 y0=a0+b0*/\ 271 "paddd %%mm6,%%mm5 \n\t"/* 6 ; b3=sum(odd3) b2=sum(odd2)*/\ 272 "movq %%mm0,%%mm4 \n\t"/* 4 ; a3 a2*/\ 273 "paddd %%mm5,%%mm0 \n\t"/* a3+b3 a2+b2*/\ 274 "psubd %%mm5,%%mm4 \n\t"/* 5 ; a3-b3 a2-b2*/\ 275 "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\ 276 "psrad $11,%%mm4 \n\t"/* y4=a3-b3 y5=a2-b2*/\ 277 "packssdw %%mm0,%%mm1 \n\t"/* 0 ; y3 y2 y1 y0*/\ 278 "packssdw %%mm3,%%mm4 \n\t"/* 3 ; y6 y7 y4 y5*/\ 279 "movq %%mm4,%%mm7 \n\t"/* 7 ; y6 y7 y4 y5*/\ 280 "psrld $16,%%mm4 \n\t"/* 0 y6 0 y4*/\ 281 "pslld $16,%%mm7 \n\t"/* y7 0 y5 0*/\ 282 "movq %%mm1," #A2 " \n\t"/* 1 ; save y3 y2 y1 y0*/\ 283 "por %%mm4,%%mm7 \n\t"/* 4 ; y7 y6 y5 y4*/\ 284 "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\ 285 286 287//----------------------------------------------------------------------------- 288// DCT_8_INV_ROW_XMM( INP, OUT, TABLE, ROUNDER 289//----------------------------------------------------------------------------- 290 291#define DCT_8_INV_ROW_XMM(A1,A2,A3,A4)\ 292 "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\ 293 "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\ 294 "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\ 295 "movq " #A3 ",%%mm3 \n\t"/* 3 ; w05 w04 w01 w00*/\ 296 "pshufw $0x88,%%mm0,%%mm0 \n\t"/* x2 x0 x2 x0*/\ 297 "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w06 w03 w02*/\ 298 "movq %%mm1,%%mm5 \n\t"/* 5 ; x7 x6 x5 x4*/\ 299 "pmaddwd %%mm0,%%mm3 \n\t"/* x2*w05+x0*w04 x2*w01+x0*w00*/\ 300 "movq 32+" #A3 ",%%mm6 \n\t"/* 6 ; w21 w20 w17 w16*/\ 301 "pshufw $0x88,%%mm1,%%mm1 \n\t"/* x6 x4 x6 x4*/\ 302 "pmaddwd %%mm1,%%mm4 \n\t"/* x6*w07+x4*w06 x6*w03+x4*w02*/\ 303 "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w22 w19 w18*/\ 304 "pshufw $0xdd,%%mm2,%%mm2 \n\t"/* x3 x1 x3 x1*/\ 305 "pmaddwd %%mm2,%%mm6 \n\t"/* x3*w21+x1*w20 x3*w17+x1*w16*/\ 306 "pshufw $0xdd,%%mm5,%%mm5 \n\t"/* x7 x5 x7 x5*/\ 307 "pmaddwd %%mm5,%%mm7 \n\t"/* x7*w23+x5*w22 x7*w19+x5*w18*/\ 308 "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\ 309 "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x2*w13+x0*w12 x2*w09+x0*w08*/\ 310 "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\ 311 "pmaddwd 24+" #A3 ",%%mm1 \n\t"/* x6*w15+x4*w14 x6*w11+x4*w10*/\ 312 "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\ 313 "pmaddwd 48+" #A3 ",%%mm2 \n\t"/* x3*w29+x1*w28 x3*w25+x1*w24*/\ 314 "paddd %%mm7,%%mm6 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\ 315 "pmaddwd 56+" #A3 ",%%mm5 \n\t"/* x7*w31+x5*w30 x7*w27+x5*w26*/\ 316 "paddd %%mm6,%%mm3 \n\t"/* a1+b1 a0+b0*/\ 317 "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\ 318 "psrad $11,%%mm3 \n\t"/* y1=a1+b1 y0=a0+b0*/\ 319 "paddd %%mm1,%%mm0 \n\t"/* 1 ; a3=sum(even3) a2=sum(even2)*/\ 320 "psubd %%mm6,%%mm4 \n\t"/* 6 ; a1-b1 a0-b0*/\ 321 "movq %%mm0,%%mm7 \n\t"/* 7 ; a3 a2*/\ 322 "paddd %%mm5,%%mm2 \n\t"/* 5 ; b3=sum(odd3) b2=sum(odd2)*/\ 323 "paddd %%mm2,%%mm0 \n\t"/* a3+b3 a2+b2*/\ 324 "psrad $11,%%mm4 \n\t"/* y6=a1-b1 y7=a0-b0*/\ 325 "psubd %%mm2,%%mm7 \n\t"/* 2 ; a3-b3 a2-b2*/\ 326 "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\ 327 "psrad $11,%%mm7 \n\t"/* y4=a3-b3 y5=a2-b2*/\ 328 "packssdw %%mm0,%%mm3 \n\t"/* 0 ; y3 y2 y1 y0*/\ 329 "packssdw %%mm4,%%mm7 \n\t"/* 4 ; y6 y7 y4 y5*/\ 330 "movq %%mm3, " #A2 " \n\t"/* 3 ; save y3 y2 y1 y0*/\ 331 "pshufw $0xb1,%%mm7,%%mm7 \n\t"/* y7 y6 y5 y4*/\ 332 "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\ 333 334 335//----------------------------------------------------------------------------- 336// 337// The first stage DCT 8x8 - forward DCTs of columns 338// 339// The %2puts are multiplied 340// for rows 0,4 - on cos_4_16, 341// for rows 1,7 - on cos_1_16, 342// for rows 2,6 - on cos_2_16, 343// for rows 3,5 - on cos_3_16 344// and are shifted to the left for rise of accuracy 345// 346//----------------------------------------------------------------------------- 347// 348// The 8-point scaled forward DCT algorithm (26a8m) 349// 350//----------------------------------------------------------------------------- 351// 352// #define DCT_8_FRW_COL(x, y) 353//{ 354// short t0, t1, t2, t3, t4, t5, t6, t7; 355// short tp03, tm03, tp12, tm12, tp65, tm65; 356// short tp465, tm465, tp765, tm765; 357// 358// t0 = LEFT_SHIFT ( x[0] + x[7] ); 359// t1 = LEFT_SHIFT ( x[1] + x[6] ); 360// t2 = LEFT_SHIFT ( x[2] + x[5] ); 361// t3 = LEFT_SHIFT ( x[3] + x[4] ); 362// t4 = LEFT_SHIFT ( x[3] - x[4] ); 363// t5 = LEFT_SHIFT ( x[2] - x[5] ); 364// t6 = LEFT_SHIFT ( x[1] - x[6] ); 365// t7 = LEFT_SHIFT ( x[0] - x[7] ); 366// 367// tp03 = t0 + t3; 368// tm03 = t0 - t3; 369// tp12 = t1 + t2; 370// tm12 = t1 - t2; 371// 372// y[0] = tp03 + tp12; 373// y[4] = tp03 - tp12; 374// 375// y[2] = tm03 + tm12 * tg_2_16; 376// y[6] = tm03 * tg_2_16 - tm12; 377// 378// tp65 =(t6 +t5 )*cos_4_16; 379// tm65 =(t6 -t5 )*cos_4_16; 380// 381// tp765 = t7 + tp65; 382// tm765 = t7 - tp65; 383// tp465 = t4 + tm65; 384// tm465 = t4 - tm65; 385// 386// y[1] = tp765 + tp465 * tg_1_16; 387// y[7] = tp765 * tg_1_16 - tp465; 388// y[5] = tm765 * tg_3_16 + tm465; 389// y[3] = tm765 - tm465 * tg_3_16; 390//} 391// 392//----------------------------------------------------------------------------- 393 394//----------------------------------------------------------------------------- 395// DCT_8_INV_COL_4 INP,OUT 396//----------------------------------------------------------------------------- 397 398#define DCT_8_INV_COL(A1,A2)\ 399 "movq 2*8(%3),%%mm0\n\t"\ 400 "movq 16*3+" #A1 ",%%mm3\n\t"\ 401 "movq %%mm0,%%mm1 \n\t"/* tg_3_16*/\ 402 "movq 16*5+" #A1 ",%%mm5\n\t"\ 403 "pmulhw %%mm3,%%mm0 \n\t"/* x3*(tg_3_16-1)*/\ 404 "movq (%3),%%mm4\n\t"\ 405 "pmulhw %%mm5,%%mm1 \n\t"/* x5*(tg_3_16-1)*/\ 406 "movq 16*7+" #A1 ",%%mm7\n\t"\ 407 "movq %%mm4,%%mm2 \n\t"/* tg_1_16*/\ 408 "movq 16*1+" #A1 ",%%mm6\n\t"\ 409 "pmulhw %%mm7,%%mm4 \n\t"/* x7*tg_1_16*/\ 410 "paddsw %%mm3,%%mm0 \n\t"/* x3*tg_3_16*/\ 411 "pmulhw %%mm6,%%mm2 \n\t"/* x1*tg_1_16*/\ 412 "paddsw %%mm3,%%mm1 \n\t"/* x3+x5*(tg_3_16-1)*/\ 413 "psubsw %%mm5,%%mm0 \n\t"/* x3*tg_3_16-x5 = tm35*/\ 414 "movq 3*8(%3),%%mm3\n\t"\ 415 "paddsw %%mm5,%%mm1 \n\t"/* x3+x5*tg_3_16 = tp35*/\ 416 "paddsw %%mm6,%%mm4 \n\t"/* x1+tg_1_16*x7 = tp17*/\ 417 "psubsw %%mm7,%%mm2 \n\t"/* x1*tg_1_16-x7 = tm17*/\ 418 "movq %%mm4,%%mm5 \n\t"/* tp17*/\ 419 "movq %%mm2,%%mm6 \n\t"/* tm17*/\ 420 "paddsw %%mm1,%%mm5 \n\t"/* tp17+tp35 = b0*/\ 421 "psubsw %%mm0,%%mm6 \n\t"/* tm17-tm35 = b3*/\ 422 "psubsw %%mm1,%%mm4 \n\t"/* tp17-tp35 = t1*/\ 423 "paddsw %%mm0,%%mm2 \n\t"/* tm17+tm35 = t2*/\ 424 "movq 1*8(%3),%%mm7\n\t"\ 425 "movq %%mm4,%%mm1 \n\t"/* t1*/\ 426 "movq %%mm5,3*16 +" #A2 "\n\t"/* save b0*/\ 427 "paddsw %%mm2,%%mm1 \n\t"/* t1+t2*/\ 428 "movq %%mm6,5*16 +" #A2 "\n\t"/* save b3*/\ 429 "psubsw %%mm2,%%mm4 \n\t"/* t1-t2*/\ 430 "movq 2*16+" #A1 ",%%mm5\n\t"\ 431 "movq %%mm7,%%mm0 \n\t"/* tg_2_16*/\ 432 "movq 6*16+" #A1 ",%%mm6\n\t"\ 433 "pmulhw %%mm5,%%mm0 \n\t"/* x2*tg_2_16*/\ 434 "pmulhw %%mm6,%%mm7 \n\t"/* x6*tg_2_16*/\ 435 "pmulhw %%mm3,%%mm1 \n\t"/* ocos_4_16*(t1+t2) = b1/2*/\ 436 "movq 0*16+" #A1 ",%%mm2\n\t"\ 437 "pmulhw %%mm3,%%mm4 \n\t"/* ocos_4_16*(t1-t2) = b2/2*/\ 438 "psubsw %%mm6,%%mm0 \n\t"/* t2*tg_2_16-x6 = tm26*/\ 439 "movq %%mm2,%%mm3 \n\t"/* x0*/\ 440 "movq 4*16+" #A1 ",%%mm6\n\t"\ 441 "paddsw %%mm5,%%mm7 \n\t"/* x2+x6*tg_2_16 = tp26*/\ 442 "paddsw %%mm6,%%mm2 \n\t"/* x0+x4 = tp04*/\ 443 "psubsw %%mm6,%%mm3 \n\t"/* x0-x4 = tm04*/\ 444 "movq %%mm2,%%mm5 \n\t"/* tp04*/\ 445 "movq %%mm3,%%mm6 \n\t"/* tm04*/\ 446 "psubsw %%mm7,%%mm2 \n\t"/* tp04-tp26 = a3*/\ 447 "paddsw %%mm0,%%mm3 \n\t"/* tm04+tm26 = a1*/\ 448 "paddsw %%mm1,%%mm1 \n\t"/* b1*/\ 449 "paddsw %%mm4,%%mm4 \n\t"/* b2*/\ 450 "paddsw %%mm7,%%mm5 \n\t"/* tp04+tp26 = a0*/\ 451 "psubsw %%mm0,%%mm6 \n\t"/* tm04-tm26 = a2*/\ 452 "movq %%mm3,%%mm7 \n\t"/* a1*/\ 453 "movq %%mm6,%%mm0 \n\t"/* a2*/\ 454 "paddsw %%mm1,%%mm3 \n\t"/* a1+b1*/\ 455 "paddsw %%mm4,%%mm6 \n\t"/* a2+b2*/\ 456 "psraw $6,%%mm3 \n\t"/* dst1*/\ 457 "psubsw %%mm1,%%mm7 \n\t"/* a1-b1*/\ 458 "psraw $6,%%mm6 \n\t"/* dst2*/\ 459 "psubsw %%mm4,%%mm0 \n\t"/* a2-b2*/\ 460 "movq 3*16+" #A2 ",%%mm1 \n\t"/* load b0*/\ 461 "psraw $6,%%mm7 \n\t"/* dst6*/\ 462 "movq %%mm5,%%mm4 \n\t"/* a0*/\ 463 "psraw $6,%%mm0 \n\t"/* dst5*/\ 464 "movq %%mm3,1*16+" #A2 "\n\t"\ 465 "paddsw %%mm1,%%mm5 \n\t"/* a0+b0*/\ 466 "movq %%mm6,2*16+" #A2 "\n\t"\ 467 "psubsw %%mm1,%%mm4 \n\t"/* a0-b0*/\ 468 "movq 5*16+" #A2 ",%%mm3 \n\t"/* load b3*/\ 469 "psraw $6,%%mm5 \n\t"/* dst0*/\ 470 "movq %%mm2,%%mm6 \n\t"/* a3*/\ 471 "psraw $6,%%mm4 \n\t"/* dst7*/\ 472 "movq %%mm0,5*16+" #A2 "\n\t"\ 473 "paddsw %%mm3,%%mm2 \n\t"/* a3+b3*/\ 474 "movq %%mm7,6*16+" #A2 "\n\t"\ 475 "psubsw %%mm3,%%mm6 \n\t"/* a3-b3*/\ 476 "movq %%mm5,0*16+" #A2 "\n\t"\ 477 "psraw $6,%%mm2 \n\t"/* dst3*/\ 478 "movq %%mm4,7*16+" #A2 "\n\t"\ 479 "psraw $6,%%mm6 \n\t"/* dst4*/\ 480 "movq %%mm2,3*16+" #A2 "\n\t"\ 481 "movq %%mm6,4*16+" #A2 "\n\t" 482 483//============================================================================= 484// Code 485//============================================================================= 486 487//----------------------------------------------------------------------------- 488// void idct_mmx(uint16_t block[64]); 489//----------------------------------------------------------------------------- 490 491 492void ff_idct_xvid_mmx(short *block){ 493__asm__ volatile( 494 //# Process each row 495 DCT_8_INV_ROW_MMX(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1)) 496 DCT_8_INV_ROW_MMX(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1)) 497 DCT_8_INV_ROW_MMX(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1)) 498 DCT_8_INV_ROW_MMX(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1)) 499 DCT_8_INV_ROW_MMX(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1)) 500 DCT_8_INV_ROW_MMX(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1)) 501 DCT_8_INV_ROW_MMX(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1)) 502 DCT_8_INV_ROW_MMX(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1)) 503 504 //# Process the columns (4 at a time) 505 DCT_8_INV_COL(0(%0), 0(%0)) 506 DCT_8_INV_COL(8(%0), 8(%0)) 507 :: "r"(block), "r"(rounder_0), "r"(tab_i_04_mmx), "r"(tg_1_16)); 508} 509 510void ff_idct_xvid_mmx_put(uint8_t *dest, int line_size, int16_t *block) 511{ 512 ff_idct_xvid_mmx(block); 513 ff_put_pixels_clamped_mmx(block, dest, line_size); 514} 515 516void ff_idct_xvid_mmx_add(uint8_t *dest, int line_size, int16_t *block) 517{ 518 ff_idct_xvid_mmx(block); 519 ff_add_pixels_clamped_mmx(block, dest, line_size); 520} 521 522#endif /* HAVE_MMX_INLINE */ 523 524#if HAVE_MMXEXT_INLINE 525 526//----------------------------------------------------------------------------- 527// void idct_xmm(uint16_t block[64]); 528//----------------------------------------------------------------------------- 529 530 531void ff_idct_xvid_mmxext(short *block) 532{ 533__asm__ volatile( 534 //# Process each row 535 DCT_8_INV_ROW_XMM(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1)) 536 DCT_8_INV_ROW_XMM(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1)) 537 DCT_8_INV_ROW_XMM(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1)) 538 DCT_8_INV_ROW_XMM(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1)) 539 DCT_8_INV_ROW_XMM(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1)) 540 DCT_8_INV_ROW_XMM(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1)) 541 DCT_8_INV_ROW_XMM(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1)) 542 DCT_8_INV_ROW_XMM(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1)) 543 544 //# Process the columns (4 at a time) 545 DCT_8_INV_COL(0(%0), 0(%0)) 546 DCT_8_INV_COL(8(%0), 8(%0)) 547 :: "r"(block), "r"(rounder_0), "r"(tab_i_04_xmm), "r"(tg_1_16)); 548} 549 550void ff_idct_xvid_mmxext_put(uint8_t *dest, int line_size, int16_t *block) 551{ 552 ff_idct_xvid_mmxext(block); 553 ff_put_pixels_clamped_mmx(block, dest, line_size); 554} 555 556void ff_idct_xvid_mmxext_add(uint8_t *dest, int line_size, int16_t *block) 557{ 558 ff_idct_xvid_mmxext(block); 559 ff_add_pixels_clamped_mmx(block, dest, line_size); 560} 561 562#endif /* HAVE_MMXEXT_INLINE */ 563