1; 2; jfdctint.asm - accurate integer FDCT (MMX) 3; 4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB 5; Copyright (C) 2016, D. R. Commander. 6; 7; Based on the x86 SIMD extension for IJG JPEG library 8; Copyright (C) 1999-2006, MIYASAKA Masaru. 9; For conditions of distribution and use, see copyright notice in jsimdext.inc 10; 11; This file should be assembled with NASM (Netwide Assembler), 12; can *not* be assembled with Microsoft's MASM or any compatible 13; assembler (including Borland's Turbo Assembler). 14; NASM is available from http://nasm.sourceforge.net/ or 15; http://sourceforge.net/project/showfiles.php?group_id=6208 16; 17; This file contains a slow-but-accurate integer implementation of the 18; forward DCT (Discrete Cosine Transform). The following code is based 19; directly on the IJG's original jfdctint.c; see the jfdctint.c for 20; more details. 21; 22; [TAB8] 23 24%include "jsimdext.inc" 25%include "jdct.inc" 26 27; -------------------------------------------------------------------------- 28 29%define CONST_BITS 13 30%define PASS1_BITS 2 31 32%define DESCALE_P1 (CONST_BITS - PASS1_BITS) 33%define DESCALE_P2 (CONST_BITS + PASS1_BITS) 34 35%if CONST_BITS == 13 36F_0_298 equ 2446 ; FIX(0.298631336) 37F_0_390 equ 3196 ; FIX(0.390180644) 38F_0_541 equ 4433 ; FIX(0.541196100) 39F_0_765 equ 6270 ; FIX(0.765366865) 40F_0_899 equ 7373 ; FIX(0.899976223) 41F_1_175 equ 9633 ; FIX(1.175875602) 42F_1_501 equ 12299 ; FIX(1.501321110) 43F_1_847 equ 15137 ; FIX(1.847759065) 44F_1_961 equ 16069 ; FIX(1.961570560) 45F_2_053 equ 16819 ; FIX(2.053119869) 46F_2_562 equ 20995 ; FIX(2.562915447) 47F_3_072 equ 25172 ; FIX(3.072711026) 48%else 49; NASM cannot do compile-time arithmetic on floating-point constants. 50%define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n)) 51F_0_298 equ DESCALE( 320652955, 30 - CONST_BITS) ; FIX(0.298631336) 52F_0_390 equ DESCALE( 418953276, 30 - CONST_BITS) ; FIX(0.390180644) 53F_0_541 equ DESCALE( 581104887, 30 - CONST_BITS) ; FIX(0.541196100) 54F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865) 55F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223) 56F_1_175 equ DESCALE(1262586813, 30 - CONST_BITS) ; FIX(1.175875602) 57F_1_501 equ DESCALE(1612031267, 30 - CONST_BITS) ; FIX(1.501321110) 58F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065) 59F_1_961 equ DESCALE(2106220350, 30 - CONST_BITS) ; FIX(1.961570560) 60F_2_053 equ DESCALE(2204520673, 30 - CONST_BITS) ; FIX(2.053119869) 61F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447) 62F_3_072 equ DESCALE(3299298341, 30 - CONST_BITS) ; FIX(3.072711026) 63%endif 64 65; -------------------------------------------------------------------------- 66 SECTION SEG_CONST 67 68 alignz 32 69 GLOBAL_DATA(jconst_fdct_islow_mmx) 70 71EXTN(jconst_fdct_islow_mmx): 72 73PW_F130_F054 times 2 dw (F_0_541 + F_0_765), F_0_541 74PW_F054_MF130 times 2 dw F_0_541, (F_0_541 - F_1_847) 75PW_MF078_F117 times 2 dw (F_1_175 - F_1_961), F_1_175 76PW_F117_F078 times 2 dw F_1_175, (F_1_175 - F_0_390) 77PW_MF060_MF089 times 2 dw (F_0_298 - F_0_899), -F_0_899 78PW_MF089_F060 times 2 dw -F_0_899, (F_1_501 - F_0_899) 79PW_MF050_MF256 times 2 dw (F_2_053 - F_2_562), -F_2_562 80PW_MF256_F050 times 2 dw -F_2_562, (F_3_072 - F_2_562) 81PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1 - 1) 82PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2 - 1) 83PW_DESCALE_P2X times 4 dw 1 << (PASS1_BITS - 1) 84 85 alignz 32 86 87; -------------------------------------------------------------------------- 88 SECTION SEG_TEXT 89 BITS 32 90; 91; Perform the forward DCT on one block of samples. 92; 93; GLOBAL(void) 94; jsimd_fdct_islow_mmx(DCTELEM *data) 95; 96 97%define data(b) (b) + 8 ; DCTELEM *data 98 99%define original_ebp ebp + 0 100%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_MMWORD ; mmword wk[WK_NUM] 101%define WK_NUM 2 102 103 align 32 104 GLOBAL_FUNCTION(jsimd_fdct_islow_mmx) 105 106EXTN(jsimd_fdct_islow_mmx): 107 push ebp 108 mov eax, esp ; eax = original ebp 109 sub esp, byte 4 110 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits 111 mov [esp], eax 112 mov ebp, esp ; ebp = aligned ebp 113 lea esp, [wk(0)] 114 pushpic ebx 115; push ecx ; need not be preserved 116; push edx ; need not be preserved 117; push esi ; unused 118; push edi ; unused 119 120 get_GOT ebx ; get GOT address 121 122 ; ---- Pass 1: process rows. 123 124 mov edx, POINTER [data(eax)] ; (DCTELEM *) 125 mov ecx, DCTSIZE/4 126 alignx 16, 7 127.rowloop: 128 129 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] 130 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] 131 movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)] 132 movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)] 133 134 ; mm0=(20 21 22 23), mm2=(24 25 26 27) 135 ; mm1=(30 31 32 33), mm3=(34 35 36 37) 136 137 movq mm4, mm0 ; transpose coefficients(phase 1) 138 punpcklwd mm0, mm1 ; mm0=(20 30 21 31) 139 punpckhwd mm4, mm1 ; mm4=(22 32 23 33) 140 movq mm5, mm2 ; transpose coefficients(phase 1) 141 punpcklwd mm2, mm3 ; mm2=(24 34 25 35) 142 punpckhwd mm5, mm3 ; mm5=(26 36 27 37) 143 144 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] 145 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] 146 movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)] 147 movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)] 148 149 ; mm6=(00 01 02 03), mm1=(04 05 06 07) 150 ; mm7=(10 11 12 13), mm3=(14 15 16 17) 151 152 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33) 153 movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35) 154 155 movq mm4, mm6 ; transpose coefficients(phase 1) 156 punpcklwd mm6, mm7 ; mm6=(00 10 01 11) 157 punpckhwd mm4, mm7 ; mm4=(02 12 03 13) 158 movq mm2, mm1 ; transpose coefficients(phase 1) 159 punpcklwd mm1, mm3 ; mm1=(04 14 05 15) 160 punpckhwd mm2, mm3 ; mm2=(06 16 07 17) 161 162 movq mm7, mm6 ; transpose coefficients(phase 2) 163 punpckldq mm6, mm0 ; mm6=(00 10 20 30)=data0 164 punpckhdq mm7, mm0 ; mm7=(01 11 21 31)=data1 165 movq mm3, mm2 ; transpose coefficients(phase 2) 166 punpckldq mm2, mm5 ; mm2=(06 16 26 36)=data6 167 punpckhdq mm3, mm5 ; mm3=(07 17 27 37)=data7 168 169 movq mm0, mm7 170 movq mm5, mm6 171 psubw mm7, mm2 ; mm7=data1-data6=tmp6 172 psubw mm6, mm3 ; mm6=data0-data7=tmp7 173 paddw mm0, mm2 ; mm0=data1+data6=tmp1 174 paddw mm5, mm3 ; mm5=data0+data7=tmp0 175 176 movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33) 177 movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35) 178 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 179 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 180 181 movq mm7, mm4 ; transpose coefficients(phase 2) 182 punpckldq mm4, mm2 ; mm4=(02 12 22 32)=data2 183 punpckhdq mm7, mm2 ; mm7=(03 13 23 33)=data3 184 movq mm6, mm1 ; transpose coefficients(phase 2) 185 punpckldq mm1, mm3 ; mm1=(04 14 24 34)=data4 186 punpckhdq mm6, mm3 ; mm6=(05 15 25 35)=data5 187 188 movq mm2, mm7 189 movq mm3, mm4 190 paddw mm7, mm1 ; mm7=data3+data4=tmp3 191 paddw mm4, mm6 ; mm4=data2+data5=tmp2 192 psubw mm2, mm1 ; mm2=data3-data4=tmp4 193 psubw mm3, mm6 ; mm3=data2-data5=tmp5 194 195 ; -- Even part 196 197 movq mm1, mm5 198 movq mm6, mm0 199 paddw mm5, mm7 ; mm5=tmp10 200 paddw mm0, mm4 ; mm0=tmp11 201 psubw mm1, mm7 ; mm1=tmp13 202 psubw mm6, mm4 ; mm6=tmp12 203 204 movq mm7, mm5 205 paddw mm5, mm0 ; mm5=tmp10+tmp11 206 psubw mm7, mm0 ; mm7=tmp10-tmp11 207 208 psllw mm5, PASS1_BITS ; mm5=data0 209 psllw mm7, PASS1_BITS ; mm7=data4 210 211 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5 212 movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm7 213 214 ; (Original) 215 ; z1 = (tmp12 + tmp13) * 0.541196100; 216 ; data2 = z1 + tmp13 * 0.765366865; 217 ; data6 = z1 + tmp12 * -1.847759065; 218 ; 219 ; (This implementation) 220 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100; 221 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065); 222 223 movq mm4, mm1 ; mm1=tmp13 224 movq mm0, mm1 225 punpcklwd mm4, mm6 ; mm6=tmp12 226 punpckhwd mm0, mm6 227 movq mm1, mm4 228 movq mm6, mm0 229 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L 230 pmaddwd mm0, [GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H 231 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L 232 pmaddwd mm6, [GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H 233 234 paddd mm4, [GOTOFF(ebx,PD_DESCALE_P1)] 235 paddd mm0, [GOTOFF(ebx,PD_DESCALE_P1)] 236 psrad mm4, DESCALE_P1 237 psrad mm0, DESCALE_P1 238 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P1)] 239 paddd mm6, [GOTOFF(ebx,PD_DESCALE_P1)] 240 psrad mm1, DESCALE_P1 241 psrad mm6, DESCALE_P1 242 243 packssdw mm4, mm0 ; mm4=data2 244 packssdw mm1, mm6 ; mm1=data6 245 246 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 247 movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm1 248 249 ; -- Odd part 250 251 movq mm5, MMWORD [wk(0)] ; mm5=tmp6 252 movq mm7, MMWORD [wk(1)] ; mm7=tmp7 253 254 movq mm0, mm2 ; mm2=tmp4 255 movq mm6, mm3 ; mm3=tmp5 256 paddw mm0, mm5 ; mm0=z3 257 paddw mm6, mm7 ; mm6=z4 258 259 ; (Original) 260 ; z5 = (z3 + z4) * 1.175875602; 261 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 262 ; z3 += z5; z4 += z5; 263 ; 264 ; (This implementation) 265 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 266 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 267 268 movq mm4, mm0 269 movq mm1, mm0 270 punpcklwd mm4, mm6 271 punpckhwd mm1, mm6 272 movq mm0, mm4 273 movq mm6, mm1 274 pmaddwd mm4, [GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L 275 pmaddwd mm1, [GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H 276 pmaddwd mm0, [GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L 277 pmaddwd mm6, [GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H 278 279 movq MMWORD [wk(0)], mm4 ; wk(0)=z3L 280 movq MMWORD [wk(1)], mm1 ; wk(1)=z3H 281 282 ; (Original) 283 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6; 284 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869; 285 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110; 286 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 287 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4; 288 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4; 289 ; 290 ; (This implementation) 291 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223; 292 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447; 293 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447); 294 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223); 295 ; data7 = tmp4 + z3; data5 = tmp5 + z4; 296 ; data3 = tmp6 + z3; data1 = tmp7 + z4; 297 298 movq mm4, mm2 299 movq mm1, mm2 300 punpcklwd mm4, mm7 301 punpckhwd mm1, mm7 302 movq mm2, mm4 303 movq mm7, mm1 304 pmaddwd mm4, [GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L 305 pmaddwd mm1, [GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H 306 pmaddwd mm2, [GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L 307 pmaddwd mm7, [GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H 308 309 paddd mm4, MMWORD [wk(0)] ; mm4=data7L 310 paddd mm1, MMWORD [wk(1)] ; mm1=data7H 311 paddd mm2, mm0 ; mm2=data1L 312 paddd mm7, mm6 ; mm7=data1H 313 314 paddd mm4, [GOTOFF(ebx,PD_DESCALE_P1)] 315 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P1)] 316 psrad mm4, DESCALE_P1 317 psrad mm1, DESCALE_P1 318 paddd mm2, [GOTOFF(ebx,PD_DESCALE_P1)] 319 paddd mm7, [GOTOFF(ebx,PD_DESCALE_P1)] 320 psrad mm2, DESCALE_P1 321 psrad mm7, DESCALE_P1 322 323 packssdw mm4, mm1 ; mm4=data7 324 packssdw mm2, mm7 ; mm2=data1 325 326 movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm4 327 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2 328 329 movq mm1, mm3 330 movq mm7, mm3 331 punpcklwd mm1, mm5 332 punpckhwd mm7, mm5 333 movq mm3, mm1 334 movq mm5, mm7 335 pmaddwd mm1, [GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L 336 pmaddwd mm7, [GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H 337 pmaddwd mm3, [GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L 338 pmaddwd mm5, [GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H 339 340 paddd mm1, mm0 ; mm1=data5L 341 paddd mm7, mm6 ; mm7=data5H 342 paddd mm3, MMWORD [wk(0)] ; mm3=data3L 343 paddd mm5, MMWORD [wk(1)] ; mm5=data3H 344 345 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P1)] 346 paddd mm7, [GOTOFF(ebx,PD_DESCALE_P1)] 347 psrad mm1, DESCALE_P1 348 psrad mm7, DESCALE_P1 349 paddd mm3, [GOTOFF(ebx,PD_DESCALE_P1)] 350 paddd mm5, [GOTOFF(ebx,PD_DESCALE_P1)] 351 psrad mm3, DESCALE_P1 352 psrad mm5, DESCALE_P1 353 354 packssdw mm1, mm7 ; mm1=data5 355 packssdw mm3, mm5 ; mm3=data3 356 357 movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm1 358 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3 359 360 add edx, byte 4*DCTSIZE*SIZEOF_DCTELEM 361 dec ecx 362 jnz near .rowloop 363 364 ; ---- Pass 2: process columns. 365 366 mov edx, POINTER [data(eax)] ; (DCTELEM *) 367 mov ecx, DCTSIZE/4 368 alignx 16, 7 369.columnloop: 370 371 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] 372 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] 373 movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)] 374 movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)] 375 376 ; mm0=(02 12 22 32), mm2=(42 52 62 72) 377 ; mm1=(03 13 23 33), mm3=(43 53 63 73) 378 379 movq mm4, mm0 ; transpose coefficients(phase 1) 380 punpcklwd mm0, mm1 ; mm0=(02 03 12 13) 381 punpckhwd mm4, mm1 ; mm4=(22 23 32 33) 382 movq mm5, mm2 ; transpose coefficients(phase 1) 383 punpcklwd mm2, mm3 ; mm2=(42 43 52 53) 384 punpckhwd mm5, mm3 ; mm5=(62 63 72 73) 385 386 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] 387 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] 388 movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)] 389 movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)] 390 391 ; mm6=(00 10 20 30), mm1=(40 50 60 70) 392 ; mm7=(01 11 21 31), mm3=(41 51 61 71) 393 394 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33) 395 movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53) 396 397 movq mm4, mm6 ; transpose coefficients(phase 1) 398 punpcklwd mm6, mm7 ; mm6=(00 01 10 11) 399 punpckhwd mm4, mm7 ; mm4=(20 21 30 31) 400 movq mm2, mm1 ; transpose coefficients(phase 1) 401 punpcklwd mm1, mm3 ; mm1=(40 41 50 51) 402 punpckhwd mm2, mm3 ; mm2=(60 61 70 71) 403 404 movq mm7, mm6 ; transpose coefficients(phase 2) 405 punpckldq mm6, mm0 ; mm6=(00 01 02 03)=data0 406 punpckhdq mm7, mm0 ; mm7=(10 11 12 13)=data1 407 movq mm3, mm2 ; transpose coefficients(phase 2) 408 punpckldq mm2, mm5 ; mm2=(60 61 62 63)=data6 409 punpckhdq mm3, mm5 ; mm3=(70 71 72 73)=data7 410 411 movq mm0, mm7 412 movq mm5, mm6 413 psubw mm7, mm2 ; mm7=data1-data6=tmp6 414 psubw mm6, mm3 ; mm6=data0-data7=tmp7 415 paddw mm0, mm2 ; mm0=data1+data6=tmp1 416 paddw mm5, mm3 ; mm5=data0+data7=tmp0 417 418 movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33) 419 movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53) 420 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 421 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 422 423 movq mm7, mm4 ; transpose coefficients(phase 2) 424 punpckldq mm4, mm2 ; mm4=(20 21 22 23)=data2 425 punpckhdq mm7, mm2 ; mm7=(30 31 32 33)=data3 426 movq mm6, mm1 ; transpose coefficients(phase 2) 427 punpckldq mm1, mm3 ; mm1=(40 41 42 43)=data4 428 punpckhdq mm6, mm3 ; mm6=(50 51 52 53)=data5 429 430 movq mm2, mm7 431 movq mm3, mm4 432 paddw mm7, mm1 ; mm7=data3+data4=tmp3 433 paddw mm4, mm6 ; mm4=data2+data5=tmp2 434 psubw mm2, mm1 ; mm2=data3-data4=tmp4 435 psubw mm3, mm6 ; mm3=data2-data5=tmp5 436 437 ; -- Even part 438 439 movq mm1, mm5 440 movq mm6, mm0 441 paddw mm5, mm7 ; mm5=tmp10 442 paddw mm0, mm4 ; mm0=tmp11 443 psubw mm1, mm7 ; mm1=tmp13 444 psubw mm6, mm4 ; mm6=tmp12 445 446 movq mm7, mm5 447 paddw mm5, mm0 ; mm5=tmp10+tmp11 448 psubw mm7, mm0 ; mm7=tmp10-tmp11 449 450 paddw mm5, [GOTOFF(ebx,PW_DESCALE_P2X)] 451 paddw mm7, [GOTOFF(ebx,PW_DESCALE_P2X)] 452 psraw mm5, PASS1_BITS ; mm5=data0 453 psraw mm7, PASS1_BITS ; mm7=data4 454 455 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5 456 movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm7 457 458 ; (Original) 459 ; z1 = (tmp12 + tmp13) * 0.541196100; 460 ; data2 = z1 + tmp13 * 0.765366865; 461 ; data6 = z1 + tmp12 * -1.847759065; 462 ; 463 ; (This implementation) 464 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100; 465 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065); 466 467 movq mm4, mm1 ; mm1=tmp13 468 movq mm0, mm1 469 punpcklwd mm4, mm6 ; mm6=tmp12 470 punpckhwd mm0, mm6 471 movq mm1, mm4 472 movq mm6, mm0 473 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L 474 pmaddwd mm0, [GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H 475 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L 476 pmaddwd mm6, [GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H 477 478 paddd mm4, [GOTOFF(ebx,PD_DESCALE_P2)] 479 paddd mm0, [GOTOFF(ebx,PD_DESCALE_P2)] 480 psrad mm4, DESCALE_P2 481 psrad mm0, DESCALE_P2 482 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P2)] 483 paddd mm6, [GOTOFF(ebx,PD_DESCALE_P2)] 484 psrad mm1, DESCALE_P2 485 psrad mm6, DESCALE_P2 486 487 packssdw mm4, mm0 ; mm4=data2 488 packssdw mm1, mm6 ; mm1=data6 489 490 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 491 movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm1 492 493 ; -- Odd part 494 495 movq mm5, MMWORD [wk(0)] ; mm5=tmp6 496 movq mm7, MMWORD [wk(1)] ; mm7=tmp7 497 498 movq mm0, mm2 ; mm2=tmp4 499 movq mm6, mm3 ; mm3=tmp5 500 paddw mm0, mm5 ; mm0=z3 501 paddw mm6, mm7 ; mm6=z4 502 503 ; (Original) 504 ; z5 = (z3 + z4) * 1.175875602; 505 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 506 ; z3 += z5; z4 += z5; 507 ; 508 ; (This implementation) 509 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 510 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 511 512 movq mm4, mm0 513 movq mm1, mm0 514 punpcklwd mm4, mm6 515 punpckhwd mm1, mm6 516 movq mm0, mm4 517 movq mm6, mm1 518 pmaddwd mm4, [GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L 519 pmaddwd mm1, [GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H 520 pmaddwd mm0, [GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L 521 pmaddwd mm6, [GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H 522 523 movq MMWORD [wk(0)], mm4 ; wk(0)=z3L 524 movq MMWORD [wk(1)], mm1 ; wk(1)=z3H 525 526 ; (Original) 527 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6; 528 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869; 529 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110; 530 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 531 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4; 532 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4; 533 ; 534 ; (This implementation) 535 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223; 536 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447; 537 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447); 538 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223); 539 ; data7 = tmp4 + z3; data5 = tmp5 + z4; 540 ; data3 = tmp6 + z3; data1 = tmp7 + z4; 541 542 movq mm4, mm2 543 movq mm1, mm2 544 punpcklwd mm4, mm7 545 punpckhwd mm1, mm7 546 movq mm2, mm4 547 movq mm7, mm1 548 pmaddwd mm4, [GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L 549 pmaddwd mm1, [GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H 550 pmaddwd mm2, [GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L 551 pmaddwd mm7, [GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H 552 553 paddd mm4, MMWORD [wk(0)] ; mm4=data7L 554 paddd mm1, MMWORD [wk(1)] ; mm1=data7H 555 paddd mm2, mm0 ; mm2=data1L 556 paddd mm7, mm6 ; mm7=data1H 557 558 paddd mm4, [GOTOFF(ebx,PD_DESCALE_P2)] 559 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P2)] 560 psrad mm4, DESCALE_P2 561 psrad mm1, DESCALE_P2 562 paddd mm2, [GOTOFF(ebx,PD_DESCALE_P2)] 563 paddd mm7, [GOTOFF(ebx,PD_DESCALE_P2)] 564 psrad mm2, DESCALE_P2 565 psrad mm7, DESCALE_P2 566 567 packssdw mm4, mm1 ; mm4=data7 568 packssdw mm2, mm7 ; mm2=data1 569 570 movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm4 571 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2 572 573 movq mm1, mm3 574 movq mm7, mm3 575 punpcklwd mm1, mm5 576 punpckhwd mm7, mm5 577 movq mm3, mm1 578 movq mm5, mm7 579 pmaddwd mm1, [GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L 580 pmaddwd mm7, [GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H 581 pmaddwd mm3, [GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L 582 pmaddwd mm5, [GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H 583 584 paddd mm1, mm0 ; mm1=data5L 585 paddd mm7, mm6 ; mm7=data5H 586 paddd mm3, MMWORD [wk(0)] ; mm3=data3L 587 paddd mm5, MMWORD [wk(1)] ; mm5=data3H 588 589 paddd mm1, [GOTOFF(ebx,PD_DESCALE_P2)] 590 paddd mm7, [GOTOFF(ebx,PD_DESCALE_P2)] 591 psrad mm1, DESCALE_P2 592 psrad mm7, DESCALE_P2 593 paddd mm3, [GOTOFF(ebx,PD_DESCALE_P2)] 594 paddd mm5, [GOTOFF(ebx,PD_DESCALE_P2)] 595 psrad mm3, DESCALE_P2 596 psrad mm5, DESCALE_P2 597 598 packssdw mm1, mm7 ; mm1=data5 599 packssdw mm3, mm5 ; mm3=data3 600 601 movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm1 602 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3 603 604 add edx, byte 4*SIZEOF_DCTELEM 605 dec ecx 606 jnz near .columnloop 607 608 emms ; empty MMX state 609 610; pop edi ; unused 611; pop esi ; unused 612; pop edx ; need not be preserved 613; pop ecx ; need not be preserved 614 poppic ebx 615 mov esp, ebp ; esp <- aligned ebp 616 pop esp ; esp <- original ebp 617 pop ebp 618 ret 619 620; For some reason, the OS X linker does not honor the request to align the 621; segment unless we do this. 622 align 32 623