1 ; 2 ; jidctint.asm - accurate integer IDCT (MMX) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman (a] cendio.se> for Cendio AB 5 ; 6 ; Based on 7 ; 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 36 F_0_298 equ 2446 ; FIX(0.298631336) 37 F_0_390 equ 3196 ; FIX(0.390180644) 38 F_0_541 equ 4433 ; FIX(0.541196100) 39 F_0_765 equ 6270 ; FIX(0.765366865) 40 F_0_899 equ 7373 ; FIX(0.899976223) 41 F_1_175 equ 9633 ; FIX(1.175875602) 42 F_1_501 equ 12299 ; FIX(1.501321110) 43 F_1_847 equ 15137 ; FIX(1.847759065) 44 F_1_961 equ 16069 ; FIX(1.961570560) 45 F_2_053 equ 16819 ; FIX(2.053119869) 46 F_2_562 equ 20995 ; FIX(2.562915447) 47 F_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)) 51 F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336) 52 F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644) 53 F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100) 54 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) 55 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) 56 F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602) 57 F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110) 58 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) 59 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) 60 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) 61 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) 62 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) 63 %endif 64 65 ; -------------------------------------------------------------------------- 66 SECTION SEG_CONST 67 68 alignz 16 69 global EXTN(jconst_idct_islow_mmx) 70 71 EXTN(jconst_idct_islow_mmx): 72 73 PW_F130_F054 times 2 dw (F_0_541+F_0_765), F_0_541 74 PW_F054_MF130 times 2 dw F_0_541, (F_0_541-F_1_847) 75 PW_MF078_F117 times 2 dw (F_1_175-F_1_961), F_1_175 76 PW_F117_F078 times 2 dw F_1_175, (F_1_175-F_0_390) 77 PW_MF060_MF089 times 2 dw (F_0_298-F_0_899),-F_0_899 78 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501-F_0_899) 79 PW_MF050_MF256 times 2 dw (F_2_053-F_2_562),-F_2_562 80 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072-F_2_562) 81 PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1-1) 82 PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2-1) 83 PB_CENTERJSAMP times 8 db CENTERJSAMPLE 84 85 alignz 16 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 ; mmword wk[WK_NUM] 105 %define WK_NUM 12 106 %define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF 107 ; JCOEF workspace[DCTSIZE2] 108 109 align 16 110 global EXTN(jsimd_idct_islow_mmx) 111 112 EXTN(jsimd_idct_islow_mmx): 113 push ebp 114 mov eax,esp ; eax = original ebp 115 sub esp, byte 4 116 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits 117 mov [esp],eax 118 mov ebp,esp ; ebp = aligned ebp 119 lea esp, [workspace] 120 push ebx 121 ; push ecx ; need not be preserved 122 ; push edx ; need not be preserved 123 push esi 124 push edi 125 126 get_GOT ebx ; get GOT address 127 128 ; ---- Pass 1: process columns from input, store into work array. 129 130 ; mov eax, [original_ebp] 131 mov edx, POINTER [dct_table(eax)] ; quantptr 132 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 133 lea edi, [workspace] ; JCOEF * wsptr 134 mov ecx, DCTSIZE/4 ; ctr 135 alignx 16,7 136 .columnloop: 137 %ifndef NO_ZERO_COLUMN_TEST_ISLOW_MMX 138 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 139 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 140 jnz short .columnDCT 141 142 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 143 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 144 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 145 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 146 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 147 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 148 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 149 por mm1,mm0 150 packsswb mm1,mm1 151 movd eax,mm1 152 test eax,eax 153 jnz short .columnDCT 154 155 ; -- AC terms all zero 156 157 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 158 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 159 160 psllw mm0,PASS1_BITS 161 162 movq mm2,mm0 ; mm0=in0=(00 01 02 03) 163 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 164 punpckhwd mm2,mm2 ; mm2=(02 02 03 03) 165 166 movq mm1,mm0 167 punpckldq mm0,mm0 ; mm0=(00 00 00 00) 168 punpckhdq mm1,mm1 ; mm1=(01 01 01 01) 169 movq mm3,mm2 170 punpckldq mm2,mm2 ; mm2=(02 02 02 02) 171 punpckhdq mm3,mm3 ; mm3=(03 03 03 03) 172 173 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0 174 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 175 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 176 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1 177 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 178 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2 179 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 180 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3 181 jmp near .nextcolumn 182 alignx 16,7 183 %endif 184 .columnDCT: 185 186 ; -- Even part 187 188 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 189 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 190 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 191 pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 192 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 193 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 194 pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 195 pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 196 197 ; (Original) 198 ; z1 = (z2 + z3) * 0.541196100; 199 ; tmp2 = z1 + z3 * -1.847759065; 200 ; tmp3 = z1 + z2 * 0.765366865; 201 ; 202 ; (This implementation) 203 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 204 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 205 206 movq mm4,mm1 ; mm1=in2=z2 207 movq mm5,mm1 208 punpcklwd mm4,mm3 ; mm3=in6=z3 209 punpckhwd mm5,mm3 210 movq mm1,mm4 211 movq mm3,mm5 212 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 213 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 214 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 215 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 216 217 movq mm6,mm0 218 paddw mm0,mm2 ; mm0=in0+in4 219 psubw mm6,mm2 ; mm6=in0-in4 220 221 pxor mm7,mm7 222 pxor mm2,mm2 223 punpcklwd mm7,mm0 ; mm7=tmp0L 224 punpckhwd mm2,mm0 ; mm2=tmp0H 225 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 226 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 227 228 movq mm0,mm7 229 paddd mm7,mm4 ; mm7=tmp10L 230 psubd mm0,mm4 ; mm0=tmp13L 231 movq mm4,mm2 232 paddd mm2,mm5 ; mm2=tmp10H 233 psubd mm4,mm5 ; mm4=tmp13H 234 235 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 236 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 237 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 238 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 239 240 pxor mm5,mm5 241 pxor mm7,mm7 242 punpcklwd mm5,mm6 ; mm5=tmp1L 243 punpckhwd mm7,mm6 ; mm7=tmp1H 244 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 245 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 246 247 movq mm2,mm5 248 paddd mm5,mm1 ; mm5=tmp11L 249 psubd mm2,mm1 ; mm2=tmp12L 250 movq mm0,mm7 251 paddd mm7,mm3 ; mm7=tmp11H 252 psubd mm0,mm3 ; mm0=tmp12H 253 254 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 255 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 256 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 257 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 258 259 ; -- Odd part 260 261 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 262 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 263 pmullw mm4, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 264 pmullw mm6, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 265 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 266 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 267 pmullw mm1, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 268 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 269 270 movq mm5,mm6 271 movq mm7,mm4 272 paddw mm5,mm3 ; mm5=z3 273 paddw mm7,mm1 ; mm7=z4 274 275 ; (Original) 276 ; z5 = (z3 + z4) * 1.175875602; 277 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 278 ; z3 += z5; z4 += z5; 279 ; 280 ; (This implementation) 281 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 282 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 283 284 movq mm2,mm5 285 movq mm0,mm5 286 punpcklwd mm2,mm7 287 punpckhwd mm0,mm7 288 movq mm5,mm2 289 movq mm7,mm0 290 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 291 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 292 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 293 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 294 295 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 296 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 297 298 ; (Original) 299 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 300 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 301 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 302 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 303 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 304 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 305 ; 306 ; (This implementation) 307 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 308 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 309 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 310 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 311 ; tmp0 += z3; tmp1 += z4; 312 ; tmp2 += z3; tmp3 += z4; 313 314 movq mm2,mm3 315 movq mm0,mm3 316 punpcklwd mm2,mm4 317 punpckhwd mm0,mm4 318 movq mm3,mm2 319 movq mm4,mm0 320 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 321 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 322 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 323 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 324 325 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 326 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 327 paddd mm3,mm5 ; mm3=tmp3L 328 paddd mm4,mm7 ; mm4=tmp3H 329 330 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 331 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 332 333 movq mm2,mm1 334 movq mm0,mm1 335 punpcklwd mm2,mm6 336 punpckhwd mm0,mm6 337 movq mm1,mm2 338 movq mm6,mm0 339 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 340 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 341 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 342 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 343 344 paddd mm2,mm5 ; mm2=tmp1L 345 paddd mm0,mm7 ; mm0=tmp1H 346 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 347 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 348 349 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 350 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 351 352 ; -- Final output stage 353 354 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 355 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 356 357 movq mm2,mm5 358 movq mm0,mm7 359 paddd mm5,mm3 ; mm5=data0L 360 paddd mm7,mm4 ; mm7=data0H 361 psubd mm2,mm3 ; mm2=data7L 362 psubd mm0,mm4 ; mm0=data7H 363 364 movq mm3,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm3=[PD_DESCALE_P1] 365 366 paddd mm5,mm3 367 paddd mm7,mm3 368 psrad mm5,DESCALE_P1 369 psrad mm7,DESCALE_P1 370 paddd mm2,mm3 371 paddd mm0,mm3 372 psrad mm2,DESCALE_P1 373 psrad mm0,DESCALE_P1 374 375 packssdw mm5,mm7 ; mm5=data0=(00 01 02 03) 376 packssdw mm2,mm0 ; mm2=data7=(70 71 72 73) 377 378 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 379 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 380 381 movq mm7,mm4 382 movq mm0,mm3 383 paddd mm4,mm1 ; mm4=data1L 384 paddd mm3,mm6 ; mm3=data1H 385 psubd mm7,mm1 ; mm7=data6L 386 psubd mm0,mm6 ; mm0=data6H 387 388 movq mm1,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm1=[PD_DESCALE_P1] 389 390 paddd mm4,mm1 391 paddd mm3,mm1 392 psrad mm4,DESCALE_P1 393 psrad mm3,DESCALE_P1 394 paddd mm7,mm1 395 paddd mm0,mm1 396 psrad mm7,DESCALE_P1 397 psrad mm0,DESCALE_P1 398 399 packssdw mm4,mm3 ; mm4=data1=(10 11 12 13) 400 packssdw mm7,mm0 ; mm7=data6=(60 61 62 63) 401 402 movq mm6,mm5 ; transpose coefficients(phase 1) 403 punpcklwd mm5,mm4 ; mm5=(00 10 01 11) 404 punpckhwd mm6,mm4 ; mm6=(02 12 03 13) 405 movq mm1,mm7 ; transpose coefficients(phase 1) 406 punpcklwd mm7,mm2 ; mm7=(60 70 61 71) 407 punpckhwd mm1,mm2 ; mm1=(62 72 63 73) 408 409 movq mm3, MMWORD [wk(6)] ; mm3=tmp12L 410 movq mm0, MMWORD [wk(7)] ; mm0=tmp12H 411 movq mm4, MMWORD [wk(10)] ; mm4=tmp1L 412 movq mm2, MMWORD [wk(11)] ; mm2=tmp1H 413 414 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 01 11) 415 movq MMWORD [wk(1)], mm6 ; wk(1)=(02 12 03 13) 416 movq MMWORD [wk(4)], mm7 ; wk(4)=(60 70 61 71) 417 movq MMWORD [wk(5)], mm1 ; wk(5)=(62 72 63 73) 418 419 movq mm5,mm3 420 movq mm6,mm0 421 paddd mm3,mm4 ; mm3=data2L 422 paddd mm0,mm2 ; mm0=data2H 423 psubd mm5,mm4 ; mm5=data5L 424 psubd mm6,mm2 ; mm6=data5H 425 426 movq mm7,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm7=[PD_DESCALE_P1] 427 428 paddd mm3,mm7 429 paddd mm0,mm7 430 psrad mm3,DESCALE_P1 431 psrad mm0,DESCALE_P1 432 paddd mm5,mm7 433 paddd mm6,mm7 434 psrad mm5,DESCALE_P1 435 psrad mm6,DESCALE_P1 436 437 packssdw mm3,mm0 ; mm3=data2=(20 21 22 23) 438 packssdw mm5,mm6 ; mm5=data5=(50 51 52 53) 439 440 movq mm1, MMWORD [wk(2)] ; mm1=tmp13L 441 movq mm4, MMWORD [wk(3)] ; mm4=tmp13H 442 movq mm2, MMWORD [wk(8)] ; mm2=tmp0L 443 movq mm7, MMWORD [wk(9)] ; mm7=tmp0H 444 445 movq mm0,mm1 446 movq mm6,mm4 447 paddd mm1,mm2 ; mm1=data3L 448 paddd mm4,mm7 ; mm4=data3H 449 psubd mm0,mm2 ; mm0=data4L 450 psubd mm6,mm7 ; mm6=data4H 451 452 movq mm2,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm2=[PD_DESCALE_P1] 453 454 paddd mm1,mm2 455 paddd mm4,mm2 456 psrad mm1,DESCALE_P1 457 psrad mm4,DESCALE_P1 458 paddd mm0,mm2 459 paddd mm6,mm2 460 psrad mm0,DESCALE_P1 461 psrad mm6,DESCALE_P1 462 463 packssdw mm1,mm4 ; mm1=data3=(30 31 32 33) 464 packssdw mm0,mm6 ; mm0=data4=(40 41 42 43) 465 466 movq mm7, MMWORD [wk(0)] ; mm7=(00 10 01 11) 467 movq mm2, MMWORD [wk(1)] ; mm2=(02 12 03 13) 468 469 movq mm4,mm3 ; transpose coefficients(phase 1) 470 punpcklwd mm3,mm1 ; mm3=(20 30 21 31) 471 punpckhwd mm4,mm1 ; mm4=(22 32 23 33) 472 movq mm6,mm0 ; transpose coefficients(phase 1) 473 punpcklwd mm0,mm5 ; mm0=(40 50 41 51) 474 punpckhwd mm6,mm5 ; mm6=(42 52 43 53) 475 476 movq mm1,mm7 ; transpose coefficients(phase 2) 477 punpckldq mm7,mm3 ; mm7=(00 10 20 30) 478 punpckhdq mm1,mm3 ; mm1=(01 11 21 31) 479 movq mm5,mm2 ; transpose coefficients(phase 2) 480 punpckldq mm2,mm4 ; mm2=(02 12 22 32) 481 punpckhdq mm5,mm4 ; mm5=(03 13 23 33) 482 483 movq mm3, MMWORD [wk(4)] ; mm3=(60 70 61 71) 484 movq mm4, MMWORD [wk(5)] ; mm4=(62 72 63 73) 485 486 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm7 487 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 488 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 489 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5 490 491 movq mm7,mm0 ; transpose coefficients(phase 2) 492 punpckldq mm0,mm3 ; mm0=(40 50 60 70) 493 punpckhdq mm7,mm3 ; mm7=(41 51 61 71) 494 movq mm1,mm6 ; transpose coefficients(phase 2) 495 punpckldq mm6,mm4 ; mm6=(42 52 62 72) 496 punpckhdq mm1,mm4 ; mm1=(43 53 63 73) 497 498 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 499 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm7 500 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm6 501 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm1 502 503 .nextcolumn: 504 add esi, byte 4*SIZEOF_JCOEF ; coef_block 505 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr 506 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr 507 dec ecx ; ctr 508 jnz near .columnloop 509 510 ; ---- Pass 2: process rows from work array, store into output array. 511 512 mov eax, [original_ebp] 513 lea esi, [workspace] ; JCOEF * wsptr 514 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 515 mov eax, JDIMENSION [output_col(eax)] 516 mov ecx, DCTSIZE/4 ; ctr 517 alignx 16,7 518 .rowloop: 519 520 ; -- Even part 521 522 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 523 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 524 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 525 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 526 527 ; (Original) 528 ; z1 = (z2 + z3) * 0.541196100; 529 ; tmp2 = z1 + z3 * -1.847759065; 530 ; tmp3 = z1 + z2 * 0.765366865; 531 ; 532 ; (This implementation) 533 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 534 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 535 536 movq mm4,mm1 ; mm1=in2=z2 537 movq mm5,mm1 538 punpcklwd mm4,mm3 ; mm3=in6=z3 539 punpckhwd mm5,mm3 540 movq mm1,mm4 541 movq mm3,mm5 542 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 543 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 544 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 545 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 546 547 movq mm6,mm0 548 paddw mm0,mm2 ; mm0=in0+in4 549 psubw mm6,mm2 ; mm6=in0-in4 550 551 pxor mm7,mm7 552 pxor mm2,mm2 553 punpcklwd mm7,mm0 ; mm7=tmp0L 554 punpckhwd mm2,mm0 ; mm2=tmp0H 555 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 556 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 557 558 movq mm0,mm7 559 paddd mm7,mm4 ; mm7=tmp10L 560 psubd mm0,mm4 ; mm0=tmp13L 561 movq mm4,mm2 562 paddd mm2,mm5 ; mm2=tmp10H 563 psubd mm4,mm5 ; mm4=tmp13H 564 565 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 566 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 567 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 568 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 569 570 pxor mm5,mm5 571 pxor mm7,mm7 572 punpcklwd mm5,mm6 ; mm5=tmp1L 573 punpckhwd mm7,mm6 ; mm7=tmp1H 574 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 575 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 576 577 movq mm2,mm5 578 paddd mm5,mm1 ; mm5=tmp11L 579 psubd mm2,mm1 ; mm2=tmp12L 580 movq mm0,mm7 581 paddd mm7,mm3 ; mm7=tmp11H 582 psubd mm0,mm3 ; mm0=tmp12H 583 584 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 585 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 586 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 587 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 588 589 ; -- Odd part 590 591 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 592 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 593 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 594 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 595 596 movq mm5,mm6 597 movq mm7,mm4 598 paddw mm5,mm3 ; mm5=z3 599 paddw mm7,mm1 ; mm7=z4 600 601 ; (Original) 602 ; z5 = (z3 + z4) * 1.175875602; 603 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 604 ; z3 += z5; z4 += z5; 605 ; 606 ; (This implementation) 607 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 608 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 609 610 movq mm2,mm5 611 movq mm0,mm5 612 punpcklwd mm2,mm7 613 punpckhwd mm0,mm7 614 movq mm5,mm2 615 movq mm7,mm0 616 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 617 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 618 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 619 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 620 621 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 622 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 623 624 ; (Original) 625 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 626 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 627 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 628 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 629 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 630 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 631 ; 632 ; (This implementation) 633 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 634 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 635 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 636 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 637 ; tmp0 += z3; tmp1 += z4; 638 ; tmp2 += z3; tmp3 += z4; 639 640 movq mm2,mm3 641 movq mm0,mm3 642 punpcklwd mm2,mm4 643 punpckhwd mm0,mm4 644 movq mm3,mm2 645 movq mm4,mm0 646 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 647 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 648 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 649 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 650 651 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 652 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 653 paddd mm3,mm5 ; mm3=tmp3L 654 paddd mm4,mm7 ; mm4=tmp3H 655 656 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 657 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 658 659 movq mm2,mm1 660 movq mm0,mm1 661 punpcklwd mm2,mm6 662 punpckhwd mm0,mm6 663 movq mm1,mm2 664 movq mm6,mm0 665 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 666 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 667 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 668 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 669 670 paddd mm2,mm5 ; mm2=tmp1L 671 paddd mm0,mm7 ; mm0=tmp1H 672 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 673 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 674 675 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 676 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 677 678 ; -- Final output stage 679 680 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 681 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 682 683 movq mm2,mm5 684 movq mm0,mm7 685 paddd mm5,mm3 ; mm5=data0L 686 paddd mm7,mm4 ; mm7=data0H 687 psubd mm2,mm3 ; mm2=data7L 688 psubd mm0,mm4 ; mm0=data7H 689 690 movq mm3,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm3=[PD_DESCALE_P2] 691 692 paddd mm5,mm3 693 paddd mm7,mm3 694 psrad mm5,DESCALE_P2 695 psrad mm7,DESCALE_P2 696 paddd mm2,mm3 697 paddd mm0,mm3 698 psrad mm2,DESCALE_P2 699 psrad mm0,DESCALE_P2 700 701 packssdw mm5,mm7 ; mm5=data0=(00 10 20 30) 702 packssdw mm2,mm0 ; mm2=data7=(07 17 27 37) 703 704 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 705 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 706 707 movq mm7,mm4 708 movq mm0,mm3 709 paddd mm4,mm1 ; mm4=data1L 710 paddd mm3,mm6 ; mm3=data1H 711 psubd mm7,mm1 ; mm7=data6L 712 psubd mm0,mm6 ; mm0=data6H 713 714 movq mm1,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm1=[PD_DESCALE_P2] 715 716 paddd mm4,mm1 717 paddd mm3,mm1 718 psrad mm4,DESCALE_P2 719 psrad mm3,DESCALE_P2 720 paddd mm7,mm1 721 paddd mm0,mm1 722 psrad mm7,DESCALE_P2 723 psrad mm0,DESCALE_P2 724 725 packssdw mm4,mm3 ; mm4=data1=(01 11 21 31) 726 packssdw mm7,mm0 ; mm7=data6=(06 16 26 36) 727 728 packsswb mm5,mm7 ; mm5=(00 10 20 30 06 16 26 36) 729 packsswb mm4,mm2 ; mm4=(01 11 21 31 07 17 27 37) 730 731 movq mm6, MMWORD [wk(6)] ; mm6=tmp12L 732 movq mm1, MMWORD [wk(7)] ; mm1=tmp12H 733 movq mm3, MMWORD [wk(10)] ; mm3=tmp1L 734 movq mm0, MMWORD [wk(11)] ; mm0=tmp1H 735 736 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 20 30 06 16 26 36) 737 movq MMWORD [wk(1)], mm4 ; wk(1)=(01 11 21 31 07 17 27 37) 738 739 movq mm7,mm6 740 movq mm2,mm1 741 paddd mm6,mm3 ; mm6=data2L 742 paddd mm1,mm0 ; mm1=data2H 743 psubd mm7,mm3 ; mm7=data5L 744 psubd mm2,mm0 ; mm2=data5H 745 746 movq mm5,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm5=[PD_DESCALE_P2] 747 748 paddd mm6,mm5 749 paddd mm1,mm5 750 psrad mm6,DESCALE_P2 751 psrad mm1,DESCALE_P2 752 paddd mm7,mm5 753 paddd mm2,mm5 754 psrad mm7,DESCALE_P2 755 psrad mm2,DESCALE_P2 756 757 packssdw mm6,mm1 ; mm6=data2=(02 12 22 32) 758 packssdw mm7,mm2 ; mm7=data5=(05 15 25 35) 759 760 movq mm4, MMWORD [wk(2)] ; mm4=tmp13L 761 movq mm3, MMWORD [wk(3)] ; mm3=tmp13H 762 movq mm0, MMWORD [wk(8)] ; mm0=tmp0L 763 movq mm5, MMWORD [wk(9)] ; mm5=tmp0H 764 765 movq mm1,mm4 766 movq mm2,mm3 767 paddd mm4,mm0 ; mm4=data3L 768 paddd mm3,mm5 ; mm3=data3H 769 psubd mm1,mm0 ; mm1=data4L 770 psubd mm2,mm5 ; mm2=data4H 771 772 movq mm0,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm0=[PD_DESCALE_P2] 773 774 paddd mm4,mm0 775 paddd mm3,mm0 776 psrad mm4,DESCALE_P2 777 psrad mm3,DESCALE_P2 778 paddd mm1,mm0 779 paddd mm2,mm0 780 psrad mm1,DESCALE_P2 781 psrad mm2,DESCALE_P2 782 783 movq mm5,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm5=[PB_CENTERJSAMP] 784 785 packssdw mm4,mm3 ; mm4=data3=(03 13 23 33) 786 packssdw mm1,mm2 ; mm1=data4=(04 14 24 34) 787 788 movq mm0, MMWORD [wk(0)] ; mm0=(00 10 20 30 06 16 26 36) 789 movq mm3, MMWORD [wk(1)] ; mm3=(01 11 21 31 07 17 27 37) 790 791 packsswb mm6,mm1 ; mm6=(02 12 22 32 04 14 24 34) 792 packsswb mm4,mm7 ; mm4=(03 13 23 33 05 15 25 35) 793 794 paddb mm0,mm5 795 paddb mm3,mm5 796 paddb mm6,mm5 797 paddb mm4,mm5 798 799 movq mm2,mm0 ; transpose coefficients(phase 1) 800 punpcklbw mm0,mm3 ; mm0=(00 01 10 11 20 21 30 31) 801 punpckhbw mm2,mm3 ; mm2=(06 07 16 17 26 27 36 37) 802 movq mm1,mm6 ; transpose coefficients(phase 1) 803 punpcklbw mm6,mm4 ; mm6=(02 03 12 13 22 23 32 33) 804 punpckhbw mm1,mm4 ; mm1=(04 05 14 15 24 25 34 35) 805 806 movq mm7,mm0 ; transpose coefficients(phase 2) 807 punpcklwd mm0,mm6 ; mm0=(00 01 02 03 10 11 12 13) 808 punpckhwd mm7,mm6 ; mm7=(20 21 22 23 30 31 32 33) 809 movq mm5,mm1 ; transpose coefficients(phase 2) 810 punpcklwd mm1,mm2 ; mm1=(04 05 06 07 14 15 16 17) 811 punpckhwd mm5,mm2 ; mm5=(24 25 26 27 34 35 36 37) 812 813 movq mm3,mm0 ; transpose coefficients(phase 3) 814 punpckldq mm0,mm1 ; mm0=(00 01 02 03 04 05 06 07) 815 punpckhdq mm3,mm1 ; mm3=(10 11 12 13 14 15 16 17) 816 movq mm4,mm7 ; transpose coefficients(phase 3) 817 punpckldq mm7,mm5 ; mm7=(20 21 22 23 24 25 26 27) 818 punpckhdq mm4,mm5 ; mm4=(30 31 32 33 34 35 36 37) 819 820 pushpic ebx ; save GOT address 821 822 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 823 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 824 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 825 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm3 826 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 827 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 828 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm7 829 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 830 831 poppic ebx ; restore GOT address 832 833 add esi, byte 4*SIZEOF_JCOEF ; wsptr 834 add edi, byte 4*SIZEOF_JSAMPROW 835 dec ecx ; ctr 836 jnz near .rowloop 837 838 emms ; empty MMX state 839 840 pop edi 841 pop esi 842 ; pop edx ; need not be preserved 843 ; pop ecx ; need not be preserved 844 pop ebx 845 mov esp,ebp ; esp <- aligned ebp 846 pop esp ; esp <- original ebp 847 pop ebp 848 ret 849 850 ; For some reason, the OS X linker does not honor the request to align the 851 ; segment unless we do this. 852 align 16 853
