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 the x86 SIMD extension for IJG JPEG library 7 ; Copyright (C) 1999-2006, MIYASAKA Masaru. 8 ; For conditions of distribution and use, see copyright notice in jsimdext.inc 9 ; 10 ; This file should be assembled with NASM (Netwide Assembler), 11 ; can *not* be assembled with Microsoft's MASM or any compatible 12 ; assembler (including Borland's Turbo Assembler). 13 ; NASM is available from http://nasm.sourceforge.net/ or 14 ; http://sourceforge.net/project/showfiles.php?group_id=6208 15 ; 16 ; This file contains a slow-but-accurate integer implementation of the 17 ; inverse DCT (Discrete Cosine Transform). The following code is based 18 ; directly on the IJG's original jidctint.c; see the jidctint.c for 19 ; more details. 20 ; 21 ; [TAB8] 22 23 %include "jsimdext.inc" 24 %include "jdct.inc" 25 26 ; -------------------------------------------------------------------------- 27 28 %define CONST_BITS 13 29 %define PASS1_BITS 2 30 31 %define DESCALE_P1 (CONST_BITS-PASS1_BITS) 32 %define DESCALE_P2 (CONST_BITS+PASS1_BITS+3) 33 34 %if CONST_BITS == 13 35 F_0_298 equ 2446 ; FIX(0.298631336) 36 F_0_390 equ 3196 ; FIX(0.390180644) 37 F_0_541 equ 4433 ; FIX(0.541196100) 38 F_0_765 equ 6270 ; FIX(0.765366865) 39 F_0_899 equ 7373 ; FIX(0.899976223) 40 F_1_175 equ 9633 ; FIX(1.175875602) 41 F_1_501 equ 12299 ; FIX(1.501321110) 42 F_1_847 equ 15137 ; FIX(1.847759065) 43 F_1_961 equ 16069 ; FIX(1.961570560) 44 F_2_053 equ 16819 ; FIX(2.053119869) 45 F_2_562 equ 20995 ; FIX(2.562915447) 46 F_3_072 equ 25172 ; FIX(3.072711026) 47 %else 48 ; NASM cannot do compile-time arithmetic on floating-point constants. 49 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) 50 F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336) 51 F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644) 52 F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100) 53 F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) 54 F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) 55 F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602) 56 F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110) 57 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) 58 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) 59 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) 60 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) 61 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) 62 %endif 63 64 ; -------------------------------------------------------------------------- 65 SECTION SEG_CONST 66 67 alignz 16 68 global EXTN(jconst_idct_islow_mmx) 69 70 EXTN(jconst_idct_islow_mmx): 71 72 PW_F130_F054 times 2 dw (F_0_541+F_0_765), F_0_541 73 PW_F054_MF130 times 2 dw F_0_541, (F_0_541-F_1_847) 74 PW_MF078_F117 times 2 dw (F_1_175-F_1_961), F_1_175 75 PW_F117_F078 times 2 dw F_1_175, (F_1_175-F_0_390) 76 PW_MF060_MF089 times 2 dw (F_0_298-F_0_899),-F_0_899 77 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501-F_0_899) 78 PW_MF050_MF256 times 2 dw (F_2_053-F_2_562),-F_2_562 79 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072-F_2_562) 80 PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1-1) 81 PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2-1) 82 PB_CENTERJSAMP times 8 db CENTERJSAMPLE 83 84 alignz 16 85 86 ; -------------------------------------------------------------------------- 87 SECTION SEG_TEXT 88 BITS 32 89 ; 90 ; Perform dequantization and inverse DCT on one block of coefficients. 91 ; 92 ; GLOBAL(void) 93 ; jsimd_idct_islow_mmx (void *dct_table, JCOEFPTR coef_block, 94 ; JSAMPARRAY output_buf, JDIMENSION output_col) 95 ; 96 97 %define dct_table(b) (b)+8 ; jpeg_component_info *compptr 98 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block 99 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf 100 %define output_col(b) (b)+20 ; JDIMENSION output_col 101 102 %define original_ebp ebp+0 103 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM] 104 %define WK_NUM 12 105 %define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF 106 ; JCOEF workspace[DCTSIZE2] 107 108 align 16 109 global EXTN(jsimd_idct_islow_mmx) 110 111 EXTN(jsimd_idct_islow_mmx): 112 push ebp 113 mov eax,esp ; eax = original ebp 114 sub esp, byte 4 115 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits 116 mov [esp],eax 117 mov ebp,esp ; ebp = aligned ebp 118 lea esp, [workspace] 119 push ebx 120 ; push ecx ; need not be preserved 121 ; push edx ; need not be preserved 122 push esi 123 push edi 124 125 get_GOT ebx ; get GOT address 126 127 ; ---- Pass 1: process columns from input, store into work array. 128 129 ; mov eax, [original_ebp] 130 mov edx, POINTER [dct_table(eax)] ; quantptr 131 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 132 lea edi, [workspace] ; JCOEF *wsptr 133 mov ecx, DCTSIZE/4 ; ctr 134 alignx 16,7 135 .columnloop: 136 %ifndef NO_ZERO_COLUMN_TEST_ISLOW_MMX 137 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 138 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 139 jnz short .columnDCT 140 141 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 142 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 143 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 144 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 145 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 146 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 147 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 148 por mm1,mm0 149 packsswb mm1,mm1 150 movd eax,mm1 151 test eax,eax 152 jnz short .columnDCT 153 154 ; -- AC terms all zero 155 156 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 157 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 158 159 psllw mm0,PASS1_BITS 160 161 movq mm2,mm0 ; mm0=in0=(00 01 02 03) 162 punpcklwd mm0,mm0 ; mm0=(00 00 01 01) 163 punpckhwd mm2,mm2 ; mm2=(02 02 03 03) 164 165 movq mm1,mm0 166 punpckldq mm0,mm0 ; mm0=(00 00 00 00) 167 punpckhdq mm1,mm1 ; mm1=(01 01 01 01) 168 movq mm3,mm2 169 punpckldq mm2,mm2 ; mm2=(02 02 02 02) 170 punpckhdq mm3,mm3 ; mm3=(03 03 03 03) 171 172 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0 173 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 174 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 175 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1 176 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 177 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2 178 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 179 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3 180 jmp near .nextcolumn 181 alignx 16,7 182 %endif 183 .columnDCT: 184 185 ; -- Even part 186 187 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 188 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 189 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 190 pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 191 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 192 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 193 pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 194 pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 195 196 ; (Original) 197 ; z1 = (z2 + z3) * 0.541196100; 198 ; tmp2 = z1 + z3 * -1.847759065; 199 ; tmp3 = z1 + z2 * 0.765366865; 200 ; 201 ; (This implementation) 202 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 203 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 204 205 movq mm4,mm1 ; mm1=in2=z2 206 movq mm5,mm1 207 punpcklwd mm4,mm3 ; mm3=in6=z3 208 punpckhwd mm5,mm3 209 movq mm1,mm4 210 movq mm3,mm5 211 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 212 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 213 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 214 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 215 216 movq mm6,mm0 217 paddw mm0,mm2 ; mm0=in0+in4 218 psubw mm6,mm2 ; mm6=in0-in4 219 220 pxor mm7,mm7 221 pxor mm2,mm2 222 punpcklwd mm7,mm0 ; mm7=tmp0L 223 punpckhwd mm2,mm0 ; mm2=tmp0H 224 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 225 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 226 227 movq mm0,mm7 228 paddd mm7,mm4 ; mm7=tmp10L 229 psubd mm0,mm4 ; mm0=tmp13L 230 movq mm4,mm2 231 paddd mm2,mm5 ; mm2=tmp10H 232 psubd mm4,mm5 ; mm4=tmp13H 233 234 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 235 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 236 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 237 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 238 239 pxor mm5,mm5 240 pxor mm7,mm7 241 punpcklwd mm5,mm6 ; mm5=tmp1L 242 punpckhwd mm7,mm6 ; mm7=tmp1H 243 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 244 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 245 246 movq mm2,mm5 247 paddd mm5,mm1 ; mm5=tmp11L 248 psubd mm2,mm1 ; mm2=tmp12L 249 movq mm0,mm7 250 paddd mm7,mm3 ; mm7=tmp11H 251 psubd mm0,mm3 ; mm0=tmp12H 252 253 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 254 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 255 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 256 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 257 258 ; -- Odd part 259 260 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 261 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 262 pmullw mm4, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 263 pmullw mm6, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 264 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 265 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 266 pmullw mm1, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 267 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 268 269 movq mm5,mm6 270 movq mm7,mm4 271 paddw mm5,mm3 ; mm5=z3 272 paddw mm7,mm1 ; mm7=z4 273 274 ; (Original) 275 ; z5 = (z3 + z4) * 1.175875602; 276 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 277 ; z3 += z5; z4 += z5; 278 ; 279 ; (This implementation) 280 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 281 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 282 283 movq mm2,mm5 284 movq mm0,mm5 285 punpcklwd mm2,mm7 286 punpckhwd mm0,mm7 287 movq mm5,mm2 288 movq mm7,mm0 289 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 290 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 291 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 292 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 293 294 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 295 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 296 297 ; (Original) 298 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 299 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 300 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 301 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 302 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 303 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 304 ; 305 ; (This implementation) 306 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 307 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 308 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 309 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 310 ; tmp0 += z3; tmp1 += z4; 311 ; tmp2 += z3; tmp3 += z4; 312 313 movq mm2,mm3 314 movq mm0,mm3 315 punpcklwd mm2,mm4 316 punpckhwd mm0,mm4 317 movq mm3,mm2 318 movq mm4,mm0 319 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 320 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 321 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 322 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 323 324 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 325 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 326 paddd mm3,mm5 ; mm3=tmp3L 327 paddd mm4,mm7 ; mm4=tmp3H 328 329 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 330 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 331 332 movq mm2,mm1 333 movq mm0,mm1 334 punpcklwd mm2,mm6 335 punpckhwd mm0,mm6 336 movq mm1,mm2 337 movq mm6,mm0 338 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 339 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 340 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 341 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 342 343 paddd mm2,mm5 ; mm2=tmp1L 344 paddd mm0,mm7 ; mm0=tmp1H 345 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 346 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 347 348 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 349 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 350 351 ; -- Final output stage 352 353 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 354 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 355 356 movq mm2,mm5 357 movq mm0,mm7 358 paddd mm5,mm3 ; mm5=data0L 359 paddd mm7,mm4 ; mm7=data0H 360 psubd mm2,mm3 ; mm2=data7L 361 psubd mm0,mm4 ; mm0=data7H 362 363 movq mm3,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm3=[PD_DESCALE_P1] 364 365 paddd mm5,mm3 366 paddd mm7,mm3 367 psrad mm5,DESCALE_P1 368 psrad mm7,DESCALE_P1 369 paddd mm2,mm3 370 paddd mm0,mm3 371 psrad mm2,DESCALE_P1 372 psrad mm0,DESCALE_P1 373 374 packssdw mm5,mm7 ; mm5=data0=(00 01 02 03) 375 packssdw mm2,mm0 ; mm2=data7=(70 71 72 73) 376 377 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 378 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 379 380 movq mm7,mm4 381 movq mm0,mm3 382 paddd mm4,mm1 ; mm4=data1L 383 paddd mm3,mm6 ; mm3=data1H 384 psubd mm7,mm1 ; mm7=data6L 385 psubd mm0,mm6 ; mm0=data6H 386 387 movq mm1,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm1=[PD_DESCALE_P1] 388 389 paddd mm4,mm1 390 paddd mm3,mm1 391 psrad mm4,DESCALE_P1 392 psrad mm3,DESCALE_P1 393 paddd mm7,mm1 394 paddd mm0,mm1 395 psrad mm7,DESCALE_P1 396 psrad mm0,DESCALE_P1 397 398 packssdw mm4,mm3 ; mm4=data1=(10 11 12 13) 399 packssdw mm7,mm0 ; mm7=data6=(60 61 62 63) 400 401 movq mm6,mm5 ; transpose coefficients(phase 1) 402 punpcklwd mm5,mm4 ; mm5=(00 10 01 11) 403 punpckhwd mm6,mm4 ; mm6=(02 12 03 13) 404 movq mm1,mm7 ; transpose coefficients(phase 1) 405 punpcklwd mm7,mm2 ; mm7=(60 70 61 71) 406 punpckhwd mm1,mm2 ; mm1=(62 72 63 73) 407 408 movq mm3, MMWORD [wk(6)] ; mm3=tmp12L 409 movq mm0, MMWORD [wk(7)] ; mm0=tmp12H 410 movq mm4, MMWORD [wk(10)] ; mm4=tmp1L 411 movq mm2, MMWORD [wk(11)] ; mm2=tmp1H 412 413 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 01 11) 414 movq MMWORD [wk(1)], mm6 ; wk(1)=(02 12 03 13) 415 movq MMWORD [wk(4)], mm7 ; wk(4)=(60 70 61 71) 416 movq MMWORD [wk(5)], mm1 ; wk(5)=(62 72 63 73) 417 418 movq mm5,mm3 419 movq mm6,mm0 420 paddd mm3,mm4 ; mm3=data2L 421 paddd mm0,mm2 ; mm0=data2H 422 psubd mm5,mm4 ; mm5=data5L 423 psubd mm6,mm2 ; mm6=data5H 424 425 movq mm7,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm7=[PD_DESCALE_P1] 426 427 paddd mm3,mm7 428 paddd mm0,mm7 429 psrad mm3,DESCALE_P1 430 psrad mm0,DESCALE_P1 431 paddd mm5,mm7 432 paddd mm6,mm7 433 psrad mm5,DESCALE_P1 434 psrad mm6,DESCALE_P1 435 436 packssdw mm3,mm0 ; mm3=data2=(20 21 22 23) 437 packssdw mm5,mm6 ; mm5=data5=(50 51 52 53) 438 439 movq mm1, MMWORD [wk(2)] ; mm1=tmp13L 440 movq mm4, MMWORD [wk(3)] ; mm4=tmp13H 441 movq mm2, MMWORD [wk(8)] ; mm2=tmp0L 442 movq mm7, MMWORD [wk(9)] ; mm7=tmp0H 443 444 movq mm0,mm1 445 movq mm6,mm4 446 paddd mm1,mm2 ; mm1=data3L 447 paddd mm4,mm7 ; mm4=data3H 448 psubd mm0,mm2 ; mm0=data4L 449 psubd mm6,mm7 ; mm6=data4H 450 451 movq mm2,[GOTOFF(ebx,PD_DESCALE_P1)] ; mm2=[PD_DESCALE_P1] 452 453 paddd mm1,mm2 454 paddd mm4,mm2 455 psrad mm1,DESCALE_P1 456 psrad mm4,DESCALE_P1 457 paddd mm0,mm2 458 paddd mm6,mm2 459 psrad mm0,DESCALE_P1 460 psrad mm6,DESCALE_P1 461 462 packssdw mm1,mm4 ; mm1=data3=(30 31 32 33) 463 packssdw mm0,mm6 ; mm0=data4=(40 41 42 43) 464 465 movq mm7, MMWORD [wk(0)] ; mm7=(00 10 01 11) 466 movq mm2, MMWORD [wk(1)] ; mm2=(02 12 03 13) 467 468 movq mm4,mm3 ; transpose coefficients(phase 1) 469 punpcklwd mm3,mm1 ; mm3=(20 30 21 31) 470 punpckhwd mm4,mm1 ; mm4=(22 32 23 33) 471 movq mm6,mm0 ; transpose coefficients(phase 1) 472 punpcklwd mm0,mm5 ; mm0=(40 50 41 51) 473 punpckhwd mm6,mm5 ; mm6=(42 52 43 53) 474 475 movq mm1,mm7 ; transpose coefficients(phase 2) 476 punpckldq mm7,mm3 ; mm7=(00 10 20 30) 477 punpckhdq mm1,mm3 ; mm1=(01 11 21 31) 478 movq mm5,mm2 ; transpose coefficients(phase 2) 479 punpckldq mm2,mm4 ; mm2=(02 12 22 32) 480 punpckhdq mm5,mm4 ; mm5=(03 13 23 33) 481 482 movq mm3, MMWORD [wk(4)] ; mm3=(60 70 61 71) 483 movq mm4, MMWORD [wk(5)] ; mm4=(62 72 63 73) 484 485 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm7 486 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 487 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 488 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5 489 490 movq mm7,mm0 ; transpose coefficients(phase 2) 491 punpckldq mm0,mm3 ; mm0=(40 50 60 70) 492 punpckhdq mm7,mm3 ; mm7=(41 51 61 71) 493 movq mm1,mm6 ; transpose coefficients(phase 2) 494 punpckldq mm6,mm4 ; mm6=(42 52 62 72) 495 punpckhdq mm1,mm4 ; mm1=(43 53 63 73) 496 497 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 498 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm7 499 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm6 500 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm1 501 502 .nextcolumn: 503 add esi, byte 4*SIZEOF_JCOEF ; coef_block 504 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr 505 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr 506 dec ecx ; ctr 507 jnz near .columnloop 508 509 ; ---- Pass 2: process rows from work array, store into output array. 510 511 mov eax, [original_ebp] 512 lea esi, [workspace] ; JCOEF *wsptr 513 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 514 mov eax, JDIMENSION [output_col(eax)] 515 mov ecx, DCTSIZE/4 ; ctr 516 alignx 16,7 517 .rowloop: 518 519 ; -- Even part 520 521 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 522 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 523 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 524 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 525 526 ; (Original) 527 ; z1 = (z2 + z3) * 0.541196100; 528 ; tmp2 = z1 + z3 * -1.847759065; 529 ; tmp3 = z1 + z2 * 0.765366865; 530 ; 531 ; (This implementation) 532 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 533 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 534 535 movq mm4,mm1 ; mm1=in2=z2 536 movq mm5,mm1 537 punpcklwd mm4,mm3 ; mm3=in6=z3 538 punpckhwd mm5,mm3 539 movq mm1,mm4 540 movq mm3,mm5 541 pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 542 pmaddwd mm5,[GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 543 pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 544 pmaddwd mm3,[GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 545 546 movq mm6,mm0 547 paddw mm0,mm2 ; mm0=in0+in4 548 psubw mm6,mm2 ; mm6=in0-in4 549 550 pxor mm7,mm7 551 pxor mm2,mm2 552 punpcklwd mm7,mm0 ; mm7=tmp0L 553 punpckhwd mm2,mm0 ; mm2=tmp0H 554 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 555 psrad mm2,(16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 556 557 movq mm0,mm7 558 paddd mm7,mm4 ; mm7=tmp10L 559 psubd mm0,mm4 ; mm0=tmp13L 560 movq mm4,mm2 561 paddd mm2,mm5 ; mm2=tmp10H 562 psubd mm4,mm5 ; mm4=tmp13H 563 564 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 565 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 566 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 567 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 568 569 pxor mm5,mm5 570 pxor mm7,mm7 571 punpcklwd mm5,mm6 ; mm5=tmp1L 572 punpckhwd mm7,mm6 ; mm7=tmp1H 573 psrad mm5,(16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 574 psrad mm7,(16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 575 576 movq mm2,mm5 577 paddd mm5,mm1 ; mm5=tmp11L 578 psubd mm2,mm1 ; mm2=tmp12L 579 movq mm0,mm7 580 paddd mm7,mm3 ; mm7=tmp11H 581 psubd mm0,mm3 ; mm0=tmp12H 582 583 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 584 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 585 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 586 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 587 588 ; -- Odd part 589 590 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 591 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 592 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 593 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 594 595 movq mm5,mm6 596 movq mm7,mm4 597 paddw mm5,mm3 ; mm5=z3 598 paddw mm7,mm1 ; mm7=z4 599 600 ; (Original) 601 ; z5 = (z3 + z4) * 1.175875602; 602 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 603 ; z3 += z5; z4 += z5; 604 ; 605 ; (This implementation) 606 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 607 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 608 609 movq mm2,mm5 610 movq mm0,mm5 611 punpcklwd mm2,mm7 612 punpckhwd mm0,mm7 613 movq mm5,mm2 614 movq mm7,mm0 615 pmaddwd mm2,[GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 616 pmaddwd mm0,[GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 617 pmaddwd mm5,[GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 618 pmaddwd mm7,[GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 619 620 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 621 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 622 623 ; (Original) 624 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 625 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 626 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 627 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 628 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 629 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 630 ; 631 ; (This implementation) 632 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 633 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 634 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 635 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 636 ; tmp0 += z3; tmp1 += z4; 637 ; tmp2 += z3; tmp3 += z4; 638 639 movq mm2,mm3 640 movq mm0,mm3 641 punpcklwd mm2,mm4 642 punpckhwd mm0,mm4 643 movq mm3,mm2 644 movq mm4,mm0 645 pmaddwd mm2,[GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 646 pmaddwd mm0,[GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 647 pmaddwd mm3,[GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 648 pmaddwd mm4,[GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 649 650 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 651 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 652 paddd mm3,mm5 ; mm3=tmp3L 653 paddd mm4,mm7 ; mm4=tmp3H 654 655 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 656 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 657 658 movq mm2,mm1 659 movq mm0,mm1 660 punpcklwd mm2,mm6 661 punpckhwd mm0,mm6 662 movq mm1,mm2 663 movq mm6,mm0 664 pmaddwd mm2,[GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 665 pmaddwd mm0,[GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 666 pmaddwd mm1,[GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 667 pmaddwd mm6,[GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 668 669 paddd mm2,mm5 ; mm2=tmp1L 670 paddd mm0,mm7 ; mm0=tmp1H 671 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 672 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 673 674 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 675 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 676 677 ; -- Final output stage 678 679 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 680 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 681 682 movq mm2,mm5 683 movq mm0,mm7 684 paddd mm5,mm3 ; mm5=data0L 685 paddd mm7,mm4 ; mm7=data0H 686 psubd mm2,mm3 ; mm2=data7L 687 psubd mm0,mm4 ; mm0=data7H 688 689 movq mm3,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm3=[PD_DESCALE_P2] 690 691 paddd mm5,mm3 692 paddd mm7,mm3 693 psrad mm5,DESCALE_P2 694 psrad mm7,DESCALE_P2 695 paddd mm2,mm3 696 paddd mm0,mm3 697 psrad mm2,DESCALE_P2 698 psrad mm0,DESCALE_P2 699 700 packssdw mm5,mm7 ; mm5=data0=(00 10 20 30) 701 packssdw mm2,mm0 ; mm2=data7=(07 17 27 37) 702 703 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 704 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 705 706 movq mm7,mm4 707 movq mm0,mm3 708 paddd mm4,mm1 ; mm4=data1L 709 paddd mm3,mm6 ; mm3=data1H 710 psubd mm7,mm1 ; mm7=data6L 711 psubd mm0,mm6 ; mm0=data6H 712 713 movq mm1,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm1=[PD_DESCALE_P2] 714 715 paddd mm4,mm1 716 paddd mm3,mm1 717 psrad mm4,DESCALE_P2 718 psrad mm3,DESCALE_P2 719 paddd mm7,mm1 720 paddd mm0,mm1 721 psrad mm7,DESCALE_P2 722 psrad mm0,DESCALE_P2 723 724 packssdw mm4,mm3 ; mm4=data1=(01 11 21 31) 725 packssdw mm7,mm0 ; mm7=data6=(06 16 26 36) 726 727 packsswb mm5,mm7 ; mm5=(00 10 20 30 06 16 26 36) 728 packsswb mm4,mm2 ; mm4=(01 11 21 31 07 17 27 37) 729 730 movq mm6, MMWORD [wk(6)] ; mm6=tmp12L 731 movq mm1, MMWORD [wk(7)] ; mm1=tmp12H 732 movq mm3, MMWORD [wk(10)] ; mm3=tmp1L 733 movq mm0, MMWORD [wk(11)] ; mm0=tmp1H 734 735 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 20 30 06 16 26 36) 736 movq MMWORD [wk(1)], mm4 ; wk(1)=(01 11 21 31 07 17 27 37) 737 738 movq mm7,mm6 739 movq mm2,mm1 740 paddd mm6,mm3 ; mm6=data2L 741 paddd mm1,mm0 ; mm1=data2H 742 psubd mm7,mm3 ; mm7=data5L 743 psubd mm2,mm0 ; mm2=data5H 744 745 movq mm5,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm5=[PD_DESCALE_P2] 746 747 paddd mm6,mm5 748 paddd mm1,mm5 749 psrad mm6,DESCALE_P2 750 psrad mm1,DESCALE_P2 751 paddd mm7,mm5 752 paddd mm2,mm5 753 psrad mm7,DESCALE_P2 754 psrad mm2,DESCALE_P2 755 756 packssdw mm6,mm1 ; mm6=data2=(02 12 22 32) 757 packssdw mm7,mm2 ; mm7=data5=(05 15 25 35) 758 759 movq mm4, MMWORD [wk(2)] ; mm4=tmp13L 760 movq mm3, MMWORD [wk(3)] ; mm3=tmp13H 761 movq mm0, MMWORD [wk(8)] ; mm0=tmp0L 762 movq mm5, MMWORD [wk(9)] ; mm5=tmp0H 763 764 movq mm1,mm4 765 movq mm2,mm3 766 paddd mm4,mm0 ; mm4=data3L 767 paddd mm3,mm5 ; mm3=data3H 768 psubd mm1,mm0 ; mm1=data4L 769 psubd mm2,mm5 ; mm2=data4H 770 771 movq mm0,[GOTOFF(ebx,PD_DESCALE_P2)] ; mm0=[PD_DESCALE_P2] 772 773 paddd mm4,mm0 774 paddd mm3,mm0 775 psrad mm4,DESCALE_P2 776 psrad mm3,DESCALE_P2 777 paddd mm1,mm0 778 paddd mm2,mm0 779 psrad mm1,DESCALE_P2 780 psrad mm2,DESCALE_P2 781 782 movq mm5,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm5=[PB_CENTERJSAMP] 783 784 packssdw mm4,mm3 ; mm4=data3=(03 13 23 33) 785 packssdw mm1,mm2 ; mm1=data4=(04 14 24 34) 786 787 movq mm0, MMWORD [wk(0)] ; mm0=(00 10 20 30 06 16 26 36) 788 movq mm3, MMWORD [wk(1)] ; mm3=(01 11 21 31 07 17 27 37) 789 790 packsswb mm6,mm1 ; mm6=(02 12 22 32 04 14 24 34) 791 packsswb mm4,mm7 ; mm4=(03 13 23 33 05 15 25 35) 792 793 paddb mm0,mm5 794 paddb mm3,mm5 795 paddb mm6,mm5 796 paddb mm4,mm5 797 798 movq mm2,mm0 ; transpose coefficients(phase 1) 799 punpcklbw mm0,mm3 ; mm0=(00 01 10 11 20 21 30 31) 800 punpckhbw mm2,mm3 ; mm2=(06 07 16 17 26 27 36 37) 801 movq mm1,mm6 ; transpose coefficients(phase 1) 802 punpcklbw mm6,mm4 ; mm6=(02 03 12 13 22 23 32 33) 803 punpckhbw mm1,mm4 ; mm1=(04 05 14 15 24 25 34 35) 804 805 movq mm7,mm0 ; transpose coefficients(phase 2) 806 punpcklwd mm0,mm6 ; mm0=(00 01 02 03 10 11 12 13) 807 punpckhwd mm7,mm6 ; mm7=(20 21 22 23 30 31 32 33) 808 movq mm5,mm1 ; transpose coefficients(phase 2) 809 punpcklwd mm1,mm2 ; mm1=(04 05 06 07 14 15 16 17) 810 punpckhwd mm5,mm2 ; mm5=(24 25 26 27 34 35 36 37) 811 812 movq mm3,mm0 ; transpose coefficients(phase 3) 813 punpckldq mm0,mm1 ; mm0=(00 01 02 03 04 05 06 07) 814 punpckhdq mm3,mm1 ; mm3=(10 11 12 13 14 15 16 17) 815 movq mm4,mm7 ; transpose coefficients(phase 3) 816 punpckldq mm7,mm5 ; mm7=(20 21 22 23 24 25 26 27) 817 punpckhdq mm4,mm5 ; mm4=(30 31 32 33 34 35 36 37) 818 819 pushpic ebx ; save GOT address 820 821 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 822 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 823 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 824 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm3 825 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 826 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 827 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm7 828 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 829 830 poppic ebx ; restore GOT address 831 832 add esi, byte 4*SIZEOF_JCOEF ; wsptr 833 add edi, byte 4*SIZEOF_JSAMPROW 834 dec ecx ; ctr 835 jnz near .rowloop 836 837 emms ; empty MMX state 838 839 pop edi 840 pop esi 841 ; pop edx ; need not be preserved 842 ; pop ecx ; need not be preserved 843 pop ebx 844 mov esp,ebp ; esp <- aligned ebp 845 pop esp ; esp <- original ebp 846 pop ebp 847 ret 848 849 ; For some reason, the OS X linker does not honor the request to align the 850 ; segment unless we do this. 851 align 16 852
