1; 2; jidctint.asm - accurate integer IDCT (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; inverse DCT (Discrete Cosine Transform). The following code is based 19; directly on the IJG's original jidctint.c; see the jidctint.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 + 3) 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_idct_islow_mmx) 70 71EXTN(jconst_idct_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) 83PB_CENTERJSAMP times 8 db CENTERJSAMPLE 84 85 alignz 32 86 87; -------------------------------------------------------------------------- 88 SECTION SEG_TEXT 89 BITS 32 90; 91; Perform dequantization and inverse DCT on one block of coefficients. 92; 93; GLOBAL(void) 94; jsimd_idct_islow_mmx(void *dct_table, JCOEFPTR coef_block, 95; JSAMPARRAY output_buf, JDIMENSION output_col) 96; 97 98%define dct_table(b) (b) + 8 ; jpeg_component_info *compptr 99%define coef_block(b) (b) + 12 ; JCOEFPTR coef_block 100%define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf 101%define output_col(b) (b) + 20 ; JDIMENSION output_col 102 103%define original_ebp ebp + 0 104%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_MMWORD 105 ; mmword wk[WK_NUM] 106%define WK_NUM 12 107%define workspace wk(0) - DCTSIZE2 * SIZEOF_JCOEF 108 ; JCOEF workspace[DCTSIZE2] 109 110 align 32 111 GLOBAL_FUNCTION(jsimd_idct_islow_mmx) 112 113EXTN(jsimd_idct_islow_mmx): 114 push ebp 115 mov eax, esp ; eax = original ebp 116 sub esp, byte 4 117 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits 118 mov [esp], eax 119 mov ebp, esp ; ebp = aligned ebp 120 lea esp, [workspace] 121 push ebx 122; push ecx ; need not be preserved 123; push edx ; need not be preserved 124 push esi 125 push edi 126 127 get_GOT ebx ; get GOT address 128 129 ; ---- Pass 1: process columns from input, store into work array. 130 131; mov eax, [original_ebp] 132 mov edx, POINTER [dct_table(eax)] ; quantptr 133 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 134 lea edi, [workspace] ; JCOEF *wsptr 135 mov ecx, DCTSIZE/4 ; ctr 136 alignx 16, 7 137.columnloop: 138%ifndef NO_ZERO_COLUMN_TEST_ISLOW_MMX 139 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 140 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 141 jnz short .columnDCT 142 143 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 144 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 145 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 146 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 147 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 148 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 149 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 150 por mm1, mm0 151 packsswb mm1, mm1 152 movd eax, mm1 153 test eax, eax 154 jnz short .columnDCT 155 156 ; -- AC terms all zero 157 158 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 159 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 160 161 psllw mm0, PASS1_BITS 162 163 movq mm2, mm0 ; mm0=in0=(00 01 02 03) 164 punpcklwd mm0, mm0 ; mm0=(00 00 01 01) 165 punpckhwd mm2, mm2 ; mm2=(02 02 03 03) 166 167 movq mm1, mm0 168 punpckldq mm0, mm0 ; mm0=(00 00 00 00) 169 punpckhdq mm1, mm1 ; mm1=(01 01 01 01) 170 movq mm3, mm2 171 punpckldq mm2, mm2 ; mm2=(02 02 02 02) 172 punpckhdq mm3, mm3 ; mm3=(03 03 03 03) 173 174 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0 175 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 176 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 177 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1 178 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 179 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2 180 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 181 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3 182 jmp near .nextcolumn 183 alignx 16, 7 184%endif 185.columnDCT: 186 187 ; -- Even part 188 189 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 190 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 191 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 192 pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 193 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 194 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 195 pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 196 pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 197 198 ; (Original) 199 ; z1 = (z2 + z3) * 0.541196100; 200 ; tmp2 = z1 + z3 * -1.847759065; 201 ; tmp3 = z1 + z2 * 0.765366865; 202 ; 203 ; (This implementation) 204 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 205 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 206 207 movq mm4, mm1 ; mm1=in2=z2 208 movq mm5, mm1 209 punpcklwd mm4, mm3 ; mm3=in6=z3 210 punpckhwd mm5, mm3 211 movq mm1, mm4 212 movq mm3, mm5 213 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 214 pmaddwd mm5, [GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 215 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 216 pmaddwd mm3, [GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 217 218 movq mm6, mm0 219 paddw mm0, mm2 ; mm0=in0+in4 220 psubw mm6, mm2 ; mm6=in0-in4 221 222 pxor mm7, mm7 223 pxor mm2, mm2 224 punpcklwd mm7, mm0 ; mm7=tmp0L 225 punpckhwd mm2, mm0 ; mm2=tmp0H 226 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 227 psrad mm2, (16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 228 229 movq mm0, mm7 230 paddd mm7, mm4 ; mm7=tmp10L 231 psubd mm0, mm4 ; mm0=tmp13L 232 movq mm4, mm2 233 paddd mm2, mm5 ; mm2=tmp10H 234 psubd mm4, mm5 ; mm4=tmp13H 235 236 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 237 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 238 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 239 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 240 241 pxor mm5, mm5 242 pxor mm7, mm7 243 punpcklwd mm5, mm6 ; mm5=tmp1L 244 punpckhwd mm7, mm6 ; mm7=tmp1H 245 psrad mm5, (16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 246 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 247 248 movq mm2, mm5 249 paddd mm5, mm1 ; mm5=tmp11L 250 psubd mm2, mm1 ; mm2=tmp12L 251 movq mm0, mm7 252 paddd mm7, mm3 ; mm7=tmp11H 253 psubd mm0, mm3 ; mm0=tmp12H 254 255 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 256 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 257 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 258 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 259 260 ; -- Odd part 261 262 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 263 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 264 pmullw mm4, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 265 pmullw mm6, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 266 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 267 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 268 pmullw mm1, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 269 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 270 271 movq mm5, mm6 272 movq mm7, mm4 273 paddw mm5, mm3 ; mm5=z3 274 paddw mm7, mm1 ; mm7=z4 275 276 ; (Original) 277 ; z5 = (z3 + z4) * 1.175875602; 278 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 279 ; z3 += z5; z4 += z5; 280 ; 281 ; (This implementation) 282 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 283 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 284 285 movq mm2, mm5 286 movq mm0, mm5 287 punpcklwd mm2, mm7 288 punpckhwd mm0, mm7 289 movq mm5, mm2 290 movq mm7, mm0 291 pmaddwd mm2, [GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 292 pmaddwd mm0, [GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 293 pmaddwd mm5, [GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 294 pmaddwd mm7, [GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 295 296 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 297 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 298 299 ; (Original) 300 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 301 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 302 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 303 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 304 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 305 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 306 ; 307 ; (This implementation) 308 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 309 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 310 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 311 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 312 ; tmp0 += z3; tmp1 += z4; 313 ; tmp2 += z3; tmp3 += z4; 314 315 movq mm2, mm3 316 movq mm0, mm3 317 punpcklwd mm2, mm4 318 punpckhwd mm0, mm4 319 movq mm3, mm2 320 movq mm4, mm0 321 pmaddwd mm2, [GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 322 pmaddwd mm0, [GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 323 pmaddwd mm3, [GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 324 pmaddwd mm4, [GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 325 326 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 327 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 328 paddd mm3, mm5 ; mm3=tmp3L 329 paddd mm4, mm7 ; mm4=tmp3H 330 331 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 332 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 333 334 movq mm2, mm1 335 movq mm0, mm1 336 punpcklwd mm2, mm6 337 punpckhwd mm0, mm6 338 movq mm1, mm2 339 movq mm6, mm0 340 pmaddwd mm2, [GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 341 pmaddwd mm0, [GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 342 pmaddwd mm1, [GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 343 pmaddwd mm6, [GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 344 345 paddd mm2, mm5 ; mm2=tmp1L 346 paddd mm0, mm7 ; mm0=tmp1H 347 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 348 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 349 350 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 351 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 352 353 ; -- Final output stage 354 355 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 356 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 357 358 movq mm2, mm5 359 movq mm0, mm7 360 paddd mm5, mm3 ; mm5=data0L 361 paddd mm7, mm4 ; mm7=data0H 362 psubd mm2, mm3 ; mm2=data7L 363 psubd mm0, mm4 ; mm0=data7H 364 365 movq mm3, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm3=[PD_DESCALE_P1] 366 367 paddd mm5, mm3 368 paddd mm7, mm3 369 psrad mm5, DESCALE_P1 370 psrad mm7, DESCALE_P1 371 paddd mm2, mm3 372 paddd mm0, mm3 373 psrad mm2, DESCALE_P1 374 psrad mm0, DESCALE_P1 375 376 packssdw mm5, mm7 ; mm5=data0=(00 01 02 03) 377 packssdw mm2, mm0 ; mm2=data7=(70 71 72 73) 378 379 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 380 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 381 382 movq mm7, mm4 383 movq mm0, mm3 384 paddd mm4, mm1 ; mm4=data1L 385 paddd mm3, mm6 ; mm3=data1H 386 psubd mm7, mm1 ; mm7=data6L 387 psubd mm0, mm6 ; mm0=data6H 388 389 movq mm1, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm1=[PD_DESCALE_P1] 390 391 paddd mm4, mm1 392 paddd mm3, mm1 393 psrad mm4, DESCALE_P1 394 psrad mm3, DESCALE_P1 395 paddd mm7, mm1 396 paddd mm0, mm1 397 psrad mm7, DESCALE_P1 398 psrad mm0, DESCALE_P1 399 400 packssdw mm4, mm3 ; mm4=data1=(10 11 12 13) 401 packssdw mm7, mm0 ; mm7=data6=(60 61 62 63) 402 403 movq mm6, mm5 ; transpose coefficients(phase 1) 404 punpcklwd mm5, mm4 ; mm5=(00 10 01 11) 405 punpckhwd mm6, mm4 ; mm6=(02 12 03 13) 406 movq mm1, mm7 ; transpose coefficients(phase 1) 407 punpcklwd mm7, mm2 ; mm7=(60 70 61 71) 408 punpckhwd mm1, mm2 ; mm1=(62 72 63 73) 409 410 movq mm3, MMWORD [wk(6)] ; mm3=tmp12L 411 movq mm0, MMWORD [wk(7)] ; mm0=tmp12H 412 movq mm4, MMWORD [wk(10)] ; mm4=tmp1L 413 movq mm2, MMWORD [wk(11)] ; mm2=tmp1H 414 415 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 01 11) 416 movq MMWORD [wk(1)], mm6 ; wk(1)=(02 12 03 13) 417 movq MMWORD [wk(4)], mm7 ; wk(4)=(60 70 61 71) 418 movq MMWORD [wk(5)], mm1 ; wk(5)=(62 72 63 73) 419 420 movq mm5, mm3 421 movq mm6, mm0 422 paddd mm3, mm4 ; mm3=data2L 423 paddd mm0, mm2 ; mm0=data2H 424 psubd mm5, mm4 ; mm5=data5L 425 psubd mm6, mm2 ; mm6=data5H 426 427 movq mm7, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm7=[PD_DESCALE_P1] 428 429 paddd mm3, mm7 430 paddd mm0, mm7 431 psrad mm3, DESCALE_P1 432 psrad mm0, DESCALE_P1 433 paddd mm5, mm7 434 paddd mm6, mm7 435 psrad mm5, DESCALE_P1 436 psrad mm6, DESCALE_P1 437 438 packssdw mm3, mm0 ; mm3=data2=(20 21 22 23) 439 packssdw mm5, mm6 ; mm5=data5=(50 51 52 53) 440 441 movq mm1, MMWORD [wk(2)] ; mm1=tmp13L 442 movq mm4, MMWORD [wk(3)] ; mm4=tmp13H 443 movq mm2, MMWORD [wk(8)] ; mm2=tmp0L 444 movq mm7, MMWORD [wk(9)] ; mm7=tmp0H 445 446 movq mm0, mm1 447 movq mm6, mm4 448 paddd mm1, mm2 ; mm1=data3L 449 paddd mm4, mm7 ; mm4=data3H 450 psubd mm0, mm2 ; mm0=data4L 451 psubd mm6, mm7 ; mm6=data4H 452 453 movq mm2, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm2=[PD_DESCALE_P1] 454 455 paddd mm1, mm2 456 paddd mm4, mm2 457 psrad mm1, DESCALE_P1 458 psrad mm4, DESCALE_P1 459 paddd mm0, mm2 460 paddd mm6, mm2 461 psrad mm0, DESCALE_P1 462 psrad mm6, DESCALE_P1 463 464 packssdw mm1, mm4 ; mm1=data3=(30 31 32 33) 465 packssdw mm0, mm6 ; mm0=data4=(40 41 42 43) 466 467 movq mm7, MMWORD [wk(0)] ; mm7=(00 10 01 11) 468 movq mm2, MMWORD [wk(1)] ; mm2=(02 12 03 13) 469 470 movq mm4, mm3 ; transpose coefficients(phase 1) 471 punpcklwd mm3, mm1 ; mm3=(20 30 21 31) 472 punpckhwd mm4, mm1 ; mm4=(22 32 23 33) 473 movq mm6, mm0 ; transpose coefficients(phase 1) 474 punpcklwd mm0, mm5 ; mm0=(40 50 41 51) 475 punpckhwd mm6, mm5 ; mm6=(42 52 43 53) 476 477 movq mm1, mm7 ; transpose coefficients(phase 2) 478 punpckldq mm7, mm3 ; mm7=(00 10 20 30) 479 punpckhdq mm1, mm3 ; mm1=(01 11 21 31) 480 movq mm5, mm2 ; transpose coefficients(phase 2) 481 punpckldq mm2, mm4 ; mm2=(02 12 22 32) 482 punpckhdq mm5, mm4 ; mm5=(03 13 23 33) 483 484 movq mm3, MMWORD [wk(4)] ; mm3=(60 70 61 71) 485 movq mm4, MMWORD [wk(5)] ; mm4=(62 72 63 73) 486 487 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm7 488 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 489 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 490 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5 491 492 movq mm7, mm0 ; transpose coefficients(phase 2) 493 punpckldq mm0, mm3 ; mm0=(40 50 60 70) 494 punpckhdq mm7, mm3 ; mm7=(41 51 61 71) 495 movq mm1, mm6 ; transpose coefficients(phase 2) 496 punpckldq mm6, mm4 ; mm6=(42 52 62 72) 497 punpckhdq mm1, mm4 ; mm1=(43 53 63 73) 498 499 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 500 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm7 501 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm6 502 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm1 503 504.nextcolumn: 505 add esi, byte 4*SIZEOF_JCOEF ; coef_block 506 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr 507 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr 508 dec ecx ; ctr 509 jnz near .columnloop 510 511 ; ---- Pass 2: process rows from work array, store into output array. 512 513 mov eax, [original_ebp] 514 lea esi, [workspace] ; JCOEF *wsptr 515 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 516 mov eax, JDIMENSION [output_col(eax)] 517 mov ecx, DCTSIZE/4 ; ctr 518 alignx 16, 7 519.rowloop: 520 521 ; -- Even part 522 523 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 524 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 525 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 526 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 527 528 ; (Original) 529 ; z1 = (z2 + z3) * 0.541196100; 530 ; tmp2 = z1 + z3 * -1.847759065; 531 ; tmp3 = z1 + z2 * 0.765366865; 532 ; 533 ; (This implementation) 534 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 535 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 536 537 movq mm4, mm1 ; mm1=in2=z2 538 movq mm5, mm1 539 punpcklwd mm4, mm3 ; mm3=in6=z3 540 punpckhwd mm5, mm3 541 movq mm1, mm4 542 movq mm3, mm5 543 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 544 pmaddwd mm5, [GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 545 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 546 pmaddwd mm3, [GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 547 548 movq mm6, mm0 549 paddw mm0, mm2 ; mm0=in0+in4 550 psubw mm6, mm2 ; mm6=in0-in4 551 552 pxor mm7, mm7 553 pxor mm2, mm2 554 punpcklwd mm7, mm0 ; mm7=tmp0L 555 punpckhwd mm2, mm0 ; mm2=tmp0H 556 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 557 psrad mm2, (16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 558 559 movq mm0, mm7 560 paddd mm7, mm4 ; mm7=tmp10L 561 psubd mm0, mm4 ; mm0=tmp13L 562 movq mm4, mm2 563 paddd mm2, mm5 ; mm2=tmp10H 564 psubd mm4, mm5 ; mm4=tmp13H 565 566 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 567 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 568 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 569 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 570 571 pxor mm5, mm5 572 pxor mm7, mm7 573 punpcklwd mm5, mm6 ; mm5=tmp1L 574 punpckhwd mm7, mm6 ; mm7=tmp1H 575 psrad mm5, (16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 576 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 577 578 movq mm2, mm5 579 paddd mm5, mm1 ; mm5=tmp11L 580 psubd mm2, mm1 ; mm2=tmp12L 581 movq mm0, mm7 582 paddd mm7, mm3 ; mm7=tmp11H 583 psubd mm0, mm3 ; mm0=tmp12H 584 585 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 586 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 587 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 588 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 589 590 ; -- Odd part 591 592 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 593 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 594 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 595 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 596 597 movq mm5, mm6 598 movq mm7, mm4 599 paddw mm5, mm3 ; mm5=z3 600 paddw mm7, mm1 ; mm7=z4 601 602 ; (Original) 603 ; z5 = (z3 + z4) * 1.175875602; 604 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 605 ; z3 += z5; z4 += z5; 606 ; 607 ; (This implementation) 608 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 609 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 610 611 movq mm2, mm5 612 movq mm0, mm5 613 punpcklwd mm2, mm7 614 punpckhwd mm0, mm7 615 movq mm5, mm2 616 movq mm7, mm0 617 pmaddwd mm2, [GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 618 pmaddwd mm0, [GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 619 pmaddwd mm5, [GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 620 pmaddwd mm7, [GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 621 622 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 623 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 624 625 ; (Original) 626 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 627 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 628 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 629 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 630 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 631 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 632 ; 633 ; (This implementation) 634 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 635 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 636 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 637 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 638 ; tmp0 += z3; tmp1 += z4; 639 ; tmp2 += z3; tmp3 += z4; 640 641 movq mm2, mm3 642 movq mm0, mm3 643 punpcklwd mm2, mm4 644 punpckhwd mm0, mm4 645 movq mm3, mm2 646 movq mm4, mm0 647 pmaddwd mm2, [GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 648 pmaddwd mm0, [GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 649 pmaddwd mm3, [GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 650 pmaddwd mm4, [GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 651 652 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 653 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 654 paddd mm3, mm5 ; mm3=tmp3L 655 paddd mm4, mm7 ; mm4=tmp3H 656 657 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 658 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 659 660 movq mm2, mm1 661 movq mm0, mm1 662 punpcklwd mm2, mm6 663 punpckhwd mm0, mm6 664 movq mm1, mm2 665 movq mm6, mm0 666 pmaddwd mm2, [GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 667 pmaddwd mm0, [GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 668 pmaddwd mm1, [GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 669 pmaddwd mm6, [GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 670 671 paddd mm2, mm5 ; mm2=tmp1L 672 paddd mm0, mm7 ; mm0=tmp1H 673 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 674 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 675 676 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 677 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 678 679 ; -- Final output stage 680 681 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 682 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 683 684 movq mm2, mm5 685 movq mm0, mm7 686 paddd mm5, mm3 ; mm5=data0L 687 paddd mm7, mm4 ; mm7=data0H 688 psubd mm2, mm3 ; mm2=data7L 689 psubd mm0, mm4 ; mm0=data7H 690 691 movq mm3, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm3=[PD_DESCALE_P2] 692 693 paddd mm5, mm3 694 paddd mm7, mm3 695 psrad mm5, DESCALE_P2 696 psrad mm7, DESCALE_P2 697 paddd mm2, mm3 698 paddd mm0, mm3 699 psrad mm2, DESCALE_P2 700 psrad mm0, DESCALE_P2 701 702 packssdw mm5, mm7 ; mm5=data0=(00 10 20 30) 703 packssdw mm2, mm0 ; mm2=data7=(07 17 27 37) 704 705 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 706 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 707 708 movq mm7, mm4 709 movq mm0, mm3 710 paddd mm4, mm1 ; mm4=data1L 711 paddd mm3, mm6 ; mm3=data1H 712 psubd mm7, mm1 ; mm7=data6L 713 psubd mm0, mm6 ; mm0=data6H 714 715 movq mm1, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm1=[PD_DESCALE_P2] 716 717 paddd mm4, mm1 718 paddd mm3, mm1 719 psrad mm4, DESCALE_P2 720 psrad mm3, DESCALE_P2 721 paddd mm7, mm1 722 paddd mm0, mm1 723 psrad mm7, DESCALE_P2 724 psrad mm0, DESCALE_P2 725 726 packssdw mm4, mm3 ; mm4=data1=(01 11 21 31) 727 packssdw mm7, mm0 ; mm7=data6=(06 16 26 36) 728 729 packsswb mm5, mm7 ; mm5=(00 10 20 30 06 16 26 36) 730 packsswb mm4, mm2 ; mm4=(01 11 21 31 07 17 27 37) 731 732 movq mm6, MMWORD [wk(6)] ; mm6=tmp12L 733 movq mm1, MMWORD [wk(7)] ; mm1=tmp12H 734 movq mm3, MMWORD [wk(10)] ; mm3=tmp1L 735 movq mm0, MMWORD [wk(11)] ; mm0=tmp1H 736 737 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 20 30 06 16 26 36) 738 movq MMWORD [wk(1)], mm4 ; wk(1)=(01 11 21 31 07 17 27 37) 739 740 movq mm7, mm6 741 movq mm2, mm1 742 paddd mm6, mm3 ; mm6=data2L 743 paddd mm1, mm0 ; mm1=data2H 744 psubd mm7, mm3 ; mm7=data5L 745 psubd mm2, mm0 ; mm2=data5H 746 747 movq mm5, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm5=[PD_DESCALE_P2] 748 749 paddd mm6, mm5 750 paddd mm1, mm5 751 psrad mm6, DESCALE_P2 752 psrad mm1, DESCALE_P2 753 paddd mm7, mm5 754 paddd mm2, mm5 755 psrad mm7, DESCALE_P2 756 psrad mm2, DESCALE_P2 757 758 packssdw mm6, mm1 ; mm6=data2=(02 12 22 32) 759 packssdw mm7, mm2 ; mm7=data5=(05 15 25 35) 760 761 movq mm4, MMWORD [wk(2)] ; mm4=tmp13L 762 movq mm3, MMWORD [wk(3)] ; mm3=tmp13H 763 movq mm0, MMWORD [wk(8)] ; mm0=tmp0L 764 movq mm5, MMWORD [wk(9)] ; mm5=tmp0H 765 766 movq mm1, mm4 767 movq mm2, mm3 768 paddd mm4, mm0 ; mm4=data3L 769 paddd mm3, mm5 ; mm3=data3H 770 psubd mm1, mm0 ; mm1=data4L 771 psubd mm2, mm5 ; mm2=data4H 772 773 movq mm0, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm0=[PD_DESCALE_P2] 774 775 paddd mm4, mm0 776 paddd mm3, mm0 777 psrad mm4, DESCALE_P2 778 psrad mm3, DESCALE_P2 779 paddd mm1, mm0 780 paddd mm2, mm0 781 psrad mm1, DESCALE_P2 782 psrad mm2, DESCALE_P2 783 784 movq mm5, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm5=[PB_CENTERJSAMP] 785 786 packssdw mm4, mm3 ; mm4=data3=(03 13 23 33) 787 packssdw mm1, mm2 ; mm1=data4=(04 14 24 34) 788 789 movq mm0, MMWORD [wk(0)] ; mm0=(00 10 20 30 06 16 26 36) 790 movq mm3, MMWORD [wk(1)] ; mm3=(01 11 21 31 07 17 27 37) 791 792 packsswb mm6, mm1 ; mm6=(02 12 22 32 04 14 24 34) 793 packsswb mm4, mm7 ; mm4=(03 13 23 33 05 15 25 35) 794 795 paddb mm0, mm5 796 paddb mm3, mm5 797 paddb mm6, mm5 798 paddb mm4, mm5 799 800 movq mm2, mm0 ; transpose coefficients(phase 1) 801 punpcklbw mm0, mm3 ; mm0=(00 01 10 11 20 21 30 31) 802 punpckhbw mm2, mm3 ; mm2=(06 07 16 17 26 27 36 37) 803 movq mm1, mm6 ; transpose coefficients(phase 1) 804 punpcklbw mm6, mm4 ; mm6=(02 03 12 13 22 23 32 33) 805 punpckhbw mm1, mm4 ; mm1=(04 05 14 15 24 25 34 35) 806 807 movq mm7, mm0 ; transpose coefficients(phase 2) 808 punpcklwd mm0, mm6 ; mm0=(00 01 02 03 10 11 12 13) 809 punpckhwd mm7, mm6 ; mm7=(20 21 22 23 30 31 32 33) 810 movq mm5, mm1 ; transpose coefficients(phase 2) 811 punpcklwd mm1, mm2 ; mm1=(04 05 06 07 14 15 16 17) 812 punpckhwd mm5, mm2 ; mm5=(24 25 26 27 34 35 36 37) 813 814 movq mm3, mm0 ; transpose coefficients(phase 3) 815 punpckldq mm0, mm1 ; mm0=(00 01 02 03 04 05 06 07) 816 punpckhdq mm3, mm1 ; mm3=(10 11 12 13 14 15 16 17) 817 movq mm4, mm7 ; transpose coefficients(phase 3) 818 punpckldq mm7, mm5 ; mm7=(20 21 22 23 24 25 26 27) 819 punpckhdq mm4, mm5 ; mm4=(30 31 32 33 34 35 36 37) 820 821 pushpic ebx ; save GOT address 822 823 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 824 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 825 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 826 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm3 827 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 828 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 829 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm7 830 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 831 832 poppic ebx ; restore GOT address 833 834 add esi, byte 4*SIZEOF_JCOEF ; wsptr 835 add edi, byte 4*SIZEOF_JSAMPROW 836 dec ecx ; ctr 837 jnz near .rowloop 838 839 emms ; empty MMX state 840 841 pop edi 842 pop esi 843; pop edx ; need not be preserved 844; pop ecx ; need not be preserved 845 pop ebx 846 mov esp, ebp ; esp <- aligned ebp 847 pop esp ; esp <- original ebp 848 pop ebp 849 ret 850 851; For some reason, the OS X linker does not honor the request to align the 852; segment unless we do this. 853 align 32 854