jidctint-mmx.asm (33227B)
1 ; 2 ; jidctint.asm - accurate integer IDCT (MMX) 3 ; 4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB 5 ; Copyright (C) 2016, 2020, 2024, 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) or Yasm. 12 ; 13 ; This file contains a slower but more accurate integer implementation of the 14 ; inverse DCT (Discrete Cosine Transform). The following code is based 15 ; directly on the IJG's original jidctint.c; see the jidctint.c for 16 ; more details. 17 18 %include "jsimdext.inc" 19 %include "jdct.inc" 20 21 ; -------------------------------------------------------------------------- 22 23 %define CONST_BITS 13 24 %define PASS1_BITS 2 25 26 %define DESCALE_P1 (CONST_BITS - PASS1_BITS) 27 %define DESCALE_P2 (CONST_BITS + PASS1_BITS + 3) 28 29 %if CONST_BITS == 13 30 F_0_298 equ 2446 ; FIX(0.298631336) 31 F_0_390 equ 3196 ; FIX(0.390180644) 32 F_0_541 equ 4433 ; FIX(0.541196100) 33 F_0_765 equ 6270 ; FIX(0.765366865) 34 F_0_899 equ 7373 ; FIX(0.899976223) 35 F_1_175 equ 9633 ; FIX(1.175875602) 36 F_1_501 equ 12299 ; FIX(1.501321110) 37 F_1_847 equ 15137 ; FIX(1.847759065) 38 F_1_961 equ 16069 ; FIX(1.961570560) 39 F_2_053 equ 16819 ; FIX(2.053119869) 40 F_2_562 equ 20995 ; FIX(2.562915447) 41 F_3_072 equ 25172 ; FIX(3.072711026) 42 %else 43 ; NASM cannot do compile-time arithmetic on floating-point constants. 44 %define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n)) 45 F_0_298 equ DESCALE( 320652955, 30 - CONST_BITS) ; FIX(0.298631336) 46 F_0_390 equ DESCALE( 418953276, 30 - CONST_BITS) ; FIX(0.390180644) 47 F_0_541 equ DESCALE( 581104887, 30 - CONST_BITS) ; FIX(0.541196100) 48 F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865) 49 F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223) 50 F_1_175 equ DESCALE(1262586813, 30 - CONST_BITS) ; FIX(1.175875602) 51 F_1_501 equ DESCALE(1612031267, 30 - CONST_BITS) ; FIX(1.501321110) 52 F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065) 53 F_1_961 equ DESCALE(2106220350, 30 - CONST_BITS) ; FIX(1.961570560) 54 F_2_053 equ DESCALE(2204520673, 30 - CONST_BITS) ; FIX(2.053119869) 55 F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447) 56 F_3_072 equ DESCALE(3299298341, 30 - CONST_BITS) ; FIX(3.072711026) 57 %endif 58 59 ; -------------------------------------------------------------------------- 60 SECTION SEG_CONST 61 62 ALIGNZ 32 63 GLOBAL_DATA(jconst_idct_islow_mmx) 64 65 EXTN(jconst_idct_islow_mmx): 66 67 PW_F130_F054 times 2 dw (F_0_541 + F_0_765), F_0_541 68 PW_F054_MF130 times 2 dw F_0_541, (F_0_541 - F_1_847) 69 PW_MF078_F117 times 2 dw (F_1_175 - F_1_961), F_1_175 70 PW_F117_F078 times 2 dw F_1_175, (F_1_175 - F_0_390) 71 PW_MF060_MF089 times 2 dw (F_0_298 - F_0_899), -F_0_899 72 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501 - F_0_899) 73 PW_MF050_MF256 times 2 dw (F_2_053 - F_2_562), -F_2_562 74 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072 - F_2_562) 75 PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1 - 1) 76 PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2 - 1) 77 PB_CENTERJSAMP times 8 db CENTERJSAMPLE 78 79 ALIGNZ 32 80 81 ; -------------------------------------------------------------------------- 82 SECTION SEG_TEXT 83 BITS 32 84 ; 85 ; Perform dequantization and inverse DCT on one block of coefficients. 86 ; 87 ; GLOBAL(void) 88 ; jsimd_idct_islow_mmx(void *dct_table, JCOEFPTR coef_block, 89 ; JSAMPARRAY output_buf, JDIMENSION output_col) 90 ; 91 92 %define dct_table(b) (b) + 8 ; jpeg_component_info *compptr 93 %define coef_block(b) (b) + 12 ; JCOEFPTR coef_block 94 %define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf 95 %define output_col(b) (b) + 20 ; JDIMENSION output_col 96 97 %define original_ebp ebp + 0 98 %define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_MMWORD 99 ; mmword wk[WK_NUM] 100 %define WK_NUM 12 101 %define workspace wk(0) - DCTSIZE2 * SIZEOF_JCOEF 102 ; JCOEF workspace[DCTSIZE2] 103 104 align 32 105 GLOBAL_FUNCTION(jsimd_idct_islow_mmx) 106 107 EXTN(jsimd_idct_islow_mmx): 108 push ebp 109 mov eax, esp ; eax = original ebp 110 sub esp, byte 4 111 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits 112 mov [esp], eax 113 mov ebp, esp ; ebp = aligned ebp 114 lea esp, [workspace] 115 push ebx 116 ; push ecx ; need not be preserved 117 ; push edx ; need not be preserved 118 push esi 119 push edi 120 121 GET_GOT ebx ; get GOT address 122 123 ; ---- Pass 1: process columns from input, store into work array. 124 125 ; mov eax, [original_ebp] 126 mov edx, POINTER [dct_table(eax)] ; quantptr 127 mov esi, JCOEFPTR [coef_block(eax)] ; inptr 128 lea edi, [workspace] ; JCOEF *wsptr 129 mov ecx, DCTSIZE/4 ; ctr 130 ALIGNX 16, 7 131 .columnloop: 132 %ifndef NO_ZERO_COLUMN_TEST_ISLOW_MMX 133 mov eax, dword [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] 134 or eax, dword [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] 135 jnz short .columnDCT 136 137 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 138 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 139 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 140 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 141 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 142 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 143 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 144 por mm1, mm0 145 packsswb mm1, mm1 146 movd eax, mm1 147 test eax, eax 148 jnz short .columnDCT 149 150 ; -- AC terms all zero 151 152 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 153 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 154 155 psllw mm0, PASS1_BITS 156 157 movq mm2, mm0 ; mm0=in0=(00 01 02 03) 158 punpcklwd mm0, mm0 ; mm0=(00 00 01 01) 159 punpckhwd mm2, mm2 ; mm2=(02 02 03 03) 160 161 movq mm1, mm0 162 punpckldq mm0, mm0 ; mm0=(00 00 00 00) 163 punpckhdq mm1, mm1 ; mm1=(01 01 01 01) 164 movq mm3, mm2 165 punpckldq mm2, mm2 ; mm2=(02 02 02 02) 166 punpckhdq mm3, mm3 ; mm3=(03 03 03 03) 167 168 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0 169 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 170 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 171 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1 172 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 173 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2 174 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 175 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3 176 jmp near .nextcolumn 177 ALIGNX 16, 7 178 %endif 179 .columnDCT: 180 181 ; -- Even part 182 183 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 184 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 185 pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 186 pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 187 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 188 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 189 pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 190 pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 191 192 ; (Original) 193 ; z1 = (z2 + z3) * 0.541196100; 194 ; tmp2 = z1 + z3 * -1.847759065; 195 ; tmp3 = z1 + z2 * 0.765366865; 196 ; 197 ; (This implementation) 198 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 199 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 200 201 movq mm4, mm1 ; mm1=in2=z2 202 movq mm5, mm1 203 punpcklwd mm4, mm3 ; mm3=in6=z3 204 punpckhwd mm5, mm3 205 movq mm1, mm4 206 movq mm3, mm5 207 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 208 pmaddwd mm5, [GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 209 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 210 pmaddwd mm3, [GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 211 212 movq mm6, mm0 213 paddw mm0, mm2 ; mm0=in0+in4 214 psubw mm6, mm2 ; mm6=in0-in4 215 216 pxor mm7, mm7 217 pxor mm2, mm2 218 punpcklwd mm7, mm0 ; mm7=tmp0L 219 punpckhwd mm2, mm0 ; mm2=tmp0H 220 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 221 psrad mm2, (16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 222 223 movq mm0, mm7 224 paddd mm7, mm4 ; mm7=tmp10L 225 psubd mm0, mm4 ; mm0=tmp13L 226 movq mm4, mm2 227 paddd mm2, mm5 ; mm2=tmp10H 228 psubd mm4, mm5 ; mm4=tmp13H 229 230 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 231 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 232 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 233 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 234 235 pxor mm5, mm5 236 pxor mm7, mm7 237 punpcklwd mm5, mm6 ; mm5=tmp1L 238 punpckhwd mm7, mm6 ; mm7=tmp1H 239 psrad mm5, (16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 240 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 241 242 movq mm2, mm5 243 paddd mm5, mm1 ; mm5=tmp11L 244 psubd mm2, mm1 ; mm2=tmp12L 245 movq mm0, mm7 246 paddd mm7, mm3 ; mm7=tmp11H 247 psubd mm0, mm3 ; mm0=tmp12H 248 249 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 250 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 251 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 252 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 253 254 ; -- Odd part 255 256 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 257 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 258 pmullw mm4, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 259 pmullw mm6, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 260 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 261 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 262 pmullw mm1, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 263 pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] 264 265 movq mm5, mm6 266 movq mm7, mm4 267 paddw mm5, mm3 ; mm5=z3 268 paddw mm7, mm1 ; mm7=z4 269 270 ; (Original) 271 ; z5 = (z3 + z4) * 1.175875602; 272 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 273 ; z3 += z5; z4 += z5; 274 ; 275 ; (This implementation) 276 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 277 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 278 279 movq mm2, mm5 280 movq mm0, mm5 281 punpcklwd mm2, mm7 282 punpckhwd mm0, mm7 283 movq mm5, mm2 284 movq mm7, mm0 285 pmaddwd mm2, [GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 286 pmaddwd mm0, [GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 287 pmaddwd mm5, [GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 288 pmaddwd mm7, [GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 289 290 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 291 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 292 293 ; (Original) 294 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 295 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 296 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 297 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 298 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 299 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 300 ; 301 ; (This implementation) 302 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 303 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 304 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 305 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 306 ; tmp0 += z3; tmp1 += z4; 307 ; tmp2 += z3; tmp3 += z4; 308 309 movq mm2, mm3 310 movq mm0, mm3 311 punpcklwd mm2, mm4 312 punpckhwd mm0, mm4 313 movq mm3, mm2 314 movq mm4, mm0 315 pmaddwd mm2, [GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 316 pmaddwd mm0, [GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 317 pmaddwd mm3, [GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 318 pmaddwd mm4, [GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 319 320 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 321 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 322 paddd mm3, mm5 ; mm3=tmp3L 323 paddd mm4, mm7 ; mm4=tmp3H 324 325 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 326 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 327 328 movq mm2, mm1 329 movq mm0, mm1 330 punpcklwd mm2, mm6 331 punpckhwd mm0, mm6 332 movq mm1, mm2 333 movq mm6, mm0 334 pmaddwd mm2, [GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 335 pmaddwd mm0, [GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 336 pmaddwd mm1, [GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 337 pmaddwd mm6, [GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 338 339 paddd mm2, mm5 ; mm2=tmp1L 340 paddd mm0, mm7 ; mm0=tmp1H 341 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 342 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 343 344 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 345 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 346 347 ; -- Final output stage 348 349 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 350 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 351 352 movq mm2, mm5 353 movq mm0, mm7 354 paddd mm5, mm3 ; mm5=data0L 355 paddd mm7, mm4 ; mm7=data0H 356 psubd mm2, mm3 ; mm2=data7L 357 psubd mm0, mm4 ; mm0=data7H 358 359 movq mm3, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm3=[PD_DESCALE_P1] 360 361 paddd mm5, mm3 362 paddd mm7, mm3 363 psrad mm5, DESCALE_P1 364 psrad mm7, DESCALE_P1 365 paddd mm2, mm3 366 paddd mm0, mm3 367 psrad mm2, DESCALE_P1 368 psrad mm0, DESCALE_P1 369 370 packssdw mm5, mm7 ; mm5=data0=(00 01 02 03) 371 packssdw mm2, mm0 ; mm2=data7=(70 71 72 73) 372 373 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 374 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 375 376 movq mm7, mm4 377 movq mm0, mm3 378 paddd mm4, mm1 ; mm4=data1L 379 paddd mm3, mm6 ; mm3=data1H 380 psubd mm7, mm1 ; mm7=data6L 381 psubd mm0, mm6 ; mm0=data6H 382 383 movq mm1, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm1=[PD_DESCALE_P1] 384 385 paddd mm4, mm1 386 paddd mm3, mm1 387 psrad mm4, DESCALE_P1 388 psrad mm3, DESCALE_P1 389 paddd mm7, mm1 390 paddd mm0, mm1 391 psrad mm7, DESCALE_P1 392 psrad mm0, DESCALE_P1 393 394 packssdw mm4, mm3 ; mm4=data1=(10 11 12 13) 395 packssdw mm7, mm0 ; mm7=data6=(60 61 62 63) 396 397 movq mm6, mm5 ; transpose coefficients(phase 1) 398 punpcklwd mm5, mm4 ; mm5=(00 10 01 11) 399 punpckhwd mm6, mm4 ; mm6=(02 12 03 13) 400 movq mm1, mm7 ; transpose coefficients(phase 1) 401 punpcklwd mm7, mm2 ; mm7=(60 70 61 71) 402 punpckhwd mm1, mm2 ; mm1=(62 72 63 73) 403 404 movq mm3, MMWORD [wk(6)] ; mm3=tmp12L 405 movq mm0, MMWORD [wk(7)] ; mm0=tmp12H 406 movq mm4, MMWORD [wk(10)] ; mm4=tmp1L 407 movq mm2, MMWORD [wk(11)] ; mm2=tmp1H 408 409 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 01 11) 410 movq MMWORD [wk(1)], mm6 ; wk(1)=(02 12 03 13) 411 movq MMWORD [wk(4)], mm7 ; wk(4)=(60 70 61 71) 412 movq MMWORD [wk(5)], mm1 ; wk(5)=(62 72 63 73) 413 414 movq mm5, mm3 415 movq mm6, mm0 416 paddd mm3, mm4 ; mm3=data2L 417 paddd mm0, mm2 ; mm0=data2H 418 psubd mm5, mm4 ; mm5=data5L 419 psubd mm6, mm2 ; mm6=data5H 420 421 movq mm7, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm7=[PD_DESCALE_P1] 422 423 paddd mm3, mm7 424 paddd mm0, mm7 425 psrad mm3, DESCALE_P1 426 psrad mm0, DESCALE_P1 427 paddd mm5, mm7 428 paddd mm6, mm7 429 psrad mm5, DESCALE_P1 430 psrad mm6, DESCALE_P1 431 432 packssdw mm3, mm0 ; mm3=data2=(20 21 22 23) 433 packssdw mm5, mm6 ; mm5=data5=(50 51 52 53) 434 435 movq mm1, MMWORD [wk(2)] ; mm1=tmp13L 436 movq mm4, MMWORD [wk(3)] ; mm4=tmp13H 437 movq mm2, MMWORD [wk(8)] ; mm2=tmp0L 438 movq mm7, MMWORD [wk(9)] ; mm7=tmp0H 439 440 movq mm0, mm1 441 movq mm6, mm4 442 paddd mm1, mm2 ; mm1=data3L 443 paddd mm4, mm7 ; mm4=data3H 444 psubd mm0, mm2 ; mm0=data4L 445 psubd mm6, mm7 ; mm6=data4H 446 447 movq mm2, [GOTOFF(ebx,PD_DESCALE_P1)] ; mm2=[PD_DESCALE_P1] 448 449 paddd mm1, mm2 450 paddd mm4, mm2 451 psrad mm1, DESCALE_P1 452 psrad mm4, DESCALE_P1 453 paddd mm0, mm2 454 paddd mm6, mm2 455 psrad mm0, DESCALE_P1 456 psrad mm6, DESCALE_P1 457 458 packssdw mm1, mm4 ; mm1=data3=(30 31 32 33) 459 packssdw mm0, mm6 ; mm0=data4=(40 41 42 43) 460 461 movq mm7, MMWORD [wk(0)] ; mm7=(00 10 01 11) 462 movq mm2, MMWORD [wk(1)] ; mm2=(02 12 03 13) 463 464 movq mm4, mm3 ; transpose coefficients(phase 1) 465 punpcklwd mm3, mm1 ; mm3=(20 30 21 31) 466 punpckhwd mm4, mm1 ; mm4=(22 32 23 33) 467 movq mm6, mm0 ; transpose coefficients(phase 1) 468 punpcklwd mm0, mm5 ; mm0=(40 50 41 51) 469 punpckhwd mm6, mm5 ; mm6=(42 52 43 53) 470 471 movq mm1, mm7 ; transpose coefficients(phase 2) 472 punpckldq mm7, mm3 ; mm7=(00 10 20 30) 473 punpckhdq mm1, mm3 ; mm1=(01 11 21 31) 474 movq mm5, mm2 ; transpose coefficients(phase 2) 475 punpckldq mm2, mm4 ; mm2=(02 12 22 32) 476 punpckhdq mm5, mm4 ; mm5=(03 13 23 33) 477 478 movq mm3, MMWORD [wk(4)] ; mm3=(60 70 61 71) 479 movq mm4, MMWORD [wk(5)] ; mm4=(62 72 63 73) 480 481 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm7 482 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 483 movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 484 movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5 485 486 movq mm7, mm0 ; transpose coefficients(phase 2) 487 punpckldq mm0, mm3 ; mm0=(40 50 60 70) 488 punpckhdq mm7, mm3 ; mm7=(41 51 61 71) 489 movq mm1, mm6 ; transpose coefficients(phase 2) 490 punpckldq mm6, mm4 ; mm6=(42 52 62 72) 491 punpckhdq mm1, mm4 ; mm1=(43 53 63 73) 492 493 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0 494 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm7 495 movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm6 496 movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm1 497 498 .nextcolumn: 499 add esi, byte 4*SIZEOF_JCOEF ; coef_block 500 add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr 501 add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr 502 dec ecx ; ctr 503 jnz near .columnloop 504 505 ; ---- Pass 2: process rows from work array, store into output array. 506 507 mov eax, [original_ebp] 508 lea esi, [workspace] ; JCOEF *wsptr 509 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) 510 mov eax, JDIMENSION [output_col(eax)] 511 mov ecx, DCTSIZE/4 ; ctr 512 ALIGNX 16, 7 513 .rowloop: 514 515 ; -- Even part 516 517 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] 518 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] 519 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] 520 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] 521 522 ; (Original) 523 ; z1 = (z2 + z3) * 0.541196100; 524 ; tmp2 = z1 + z3 * -1.847759065; 525 ; tmp3 = z1 + z2 * 0.765366865; 526 ; 527 ; (This implementation) 528 ; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065); 529 ; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100; 530 531 movq mm4, mm1 ; mm1=in2=z2 532 movq mm5, mm1 533 punpcklwd mm4, mm3 ; mm3=in6=z3 534 punpckhwd mm5, mm3 535 movq mm1, mm4 536 movq mm3, mm5 537 pmaddwd mm4, [GOTOFF(ebx,PW_F130_F054)] ; mm4=tmp3L 538 pmaddwd mm5, [GOTOFF(ebx,PW_F130_F054)] ; mm5=tmp3H 539 pmaddwd mm1, [GOTOFF(ebx,PW_F054_MF130)] ; mm1=tmp2L 540 pmaddwd mm3, [GOTOFF(ebx,PW_F054_MF130)] ; mm3=tmp2H 541 542 movq mm6, mm0 543 paddw mm0, mm2 ; mm0=in0+in4 544 psubw mm6, mm2 ; mm6=in0-in4 545 546 pxor mm7, mm7 547 pxor mm2, mm2 548 punpcklwd mm7, mm0 ; mm7=tmp0L 549 punpckhwd mm2, mm0 ; mm2=tmp0H 550 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 551 psrad mm2, (16-CONST_BITS) ; psrad mm2,16 & pslld mm2,CONST_BITS 552 553 movq mm0, mm7 554 paddd mm7, mm4 ; mm7=tmp10L 555 psubd mm0, mm4 ; mm0=tmp13L 556 movq mm4, mm2 557 paddd mm2, mm5 ; mm2=tmp10H 558 psubd mm4, mm5 ; mm4=tmp13H 559 560 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp10L 561 movq MMWORD [wk(1)], mm2 ; wk(1)=tmp10H 562 movq MMWORD [wk(2)], mm0 ; wk(2)=tmp13L 563 movq MMWORD [wk(3)], mm4 ; wk(3)=tmp13H 564 565 pxor mm5, mm5 566 pxor mm7, mm7 567 punpcklwd mm5, mm6 ; mm5=tmp1L 568 punpckhwd mm7, mm6 ; mm7=tmp1H 569 psrad mm5, (16-CONST_BITS) ; psrad mm5,16 & pslld mm5,CONST_BITS 570 psrad mm7, (16-CONST_BITS) ; psrad mm7,16 & pslld mm7,CONST_BITS 571 572 movq mm2, mm5 573 paddd mm5, mm1 ; mm5=tmp11L 574 psubd mm2, mm1 ; mm2=tmp12L 575 movq mm0, mm7 576 paddd mm7, mm3 ; mm7=tmp11H 577 psubd mm0, mm3 ; mm0=tmp12H 578 579 movq MMWORD [wk(4)], mm5 ; wk(4)=tmp11L 580 movq MMWORD [wk(5)], mm7 ; wk(5)=tmp11H 581 movq MMWORD [wk(6)], mm2 ; wk(6)=tmp12L 582 movq MMWORD [wk(7)], mm0 ; wk(7)=tmp12H 583 584 ; -- Odd part 585 586 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] 587 movq mm6, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] 588 movq mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] 589 movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] 590 591 movq mm5, mm6 592 movq mm7, mm4 593 paddw mm5, mm3 ; mm5=z3 594 paddw mm7, mm1 ; mm7=z4 595 596 ; (Original) 597 ; z5 = (z3 + z4) * 1.175875602; 598 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; 599 ; z3 += z5; z4 += z5; 600 ; 601 ; (This implementation) 602 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; 603 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); 604 605 movq mm2, mm5 606 movq mm0, mm5 607 punpcklwd mm2, mm7 608 punpckhwd mm0, mm7 609 movq mm5, mm2 610 movq mm7, mm0 611 pmaddwd mm2, [GOTOFF(ebx,PW_MF078_F117)] ; mm2=z3L 612 pmaddwd mm0, [GOTOFF(ebx,PW_MF078_F117)] ; mm0=z3H 613 pmaddwd mm5, [GOTOFF(ebx,PW_F117_F078)] ; mm5=z4L 614 pmaddwd mm7, [GOTOFF(ebx,PW_F117_F078)] ; mm7=z4H 615 616 movq MMWORD [wk(10)], mm2 ; wk(10)=z3L 617 movq MMWORD [wk(11)], mm0 ; wk(11)=z3H 618 619 ; (Original) 620 ; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2; 621 ; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869; 622 ; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110; 623 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; 624 ; tmp0 += z1 + z3; tmp1 += z2 + z4; 625 ; tmp2 += z2 + z3; tmp3 += z1 + z4; 626 ; 627 ; (This implementation) 628 ; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223; 629 ; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447; 630 ; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447); 631 ; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223); 632 ; tmp0 += z3; tmp1 += z4; 633 ; tmp2 += z3; tmp3 += z4; 634 635 movq mm2, mm3 636 movq mm0, mm3 637 punpcklwd mm2, mm4 638 punpckhwd mm0, mm4 639 movq mm3, mm2 640 movq mm4, mm0 641 pmaddwd mm2, [GOTOFF(ebx,PW_MF060_MF089)] ; mm2=tmp0L 642 pmaddwd mm0, [GOTOFF(ebx,PW_MF060_MF089)] ; mm0=tmp0H 643 pmaddwd mm3, [GOTOFF(ebx,PW_MF089_F060)] ; mm3=tmp3L 644 pmaddwd mm4, [GOTOFF(ebx,PW_MF089_F060)] ; mm4=tmp3H 645 646 paddd mm2, MMWORD [wk(10)] ; mm2=tmp0L 647 paddd mm0, MMWORD [wk(11)] ; mm0=tmp0H 648 paddd mm3, mm5 ; mm3=tmp3L 649 paddd mm4, mm7 ; mm4=tmp3H 650 651 movq MMWORD [wk(8)], mm2 ; wk(8)=tmp0L 652 movq MMWORD [wk(9)], mm0 ; wk(9)=tmp0H 653 654 movq mm2, mm1 655 movq mm0, mm1 656 punpcklwd mm2, mm6 657 punpckhwd mm0, mm6 658 movq mm1, mm2 659 movq mm6, mm0 660 pmaddwd mm2, [GOTOFF(ebx,PW_MF050_MF256)] ; mm2=tmp1L 661 pmaddwd mm0, [GOTOFF(ebx,PW_MF050_MF256)] ; mm0=tmp1H 662 pmaddwd mm1, [GOTOFF(ebx,PW_MF256_F050)] ; mm1=tmp2L 663 pmaddwd mm6, [GOTOFF(ebx,PW_MF256_F050)] ; mm6=tmp2H 664 665 paddd mm2, mm5 ; mm2=tmp1L 666 paddd mm0, mm7 ; mm0=tmp1H 667 paddd mm1, MMWORD [wk(10)] ; mm1=tmp2L 668 paddd mm6, MMWORD [wk(11)] ; mm6=tmp2H 669 670 movq MMWORD [wk(10)], mm2 ; wk(10)=tmp1L 671 movq MMWORD [wk(11)], mm0 ; wk(11)=tmp1H 672 673 ; -- Final output stage 674 675 movq mm5, MMWORD [wk(0)] ; mm5=tmp10L 676 movq mm7, MMWORD [wk(1)] ; mm7=tmp10H 677 678 movq mm2, mm5 679 movq mm0, mm7 680 paddd mm5, mm3 ; mm5=data0L 681 paddd mm7, mm4 ; mm7=data0H 682 psubd mm2, mm3 ; mm2=data7L 683 psubd mm0, mm4 ; mm0=data7H 684 685 movq mm3, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm3=[PD_DESCALE_P2] 686 687 paddd mm5, mm3 688 paddd mm7, mm3 689 psrad mm5, DESCALE_P2 690 psrad mm7, DESCALE_P2 691 paddd mm2, mm3 692 paddd mm0, mm3 693 psrad mm2, DESCALE_P2 694 psrad mm0, DESCALE_P2 695 696 packssdw mm5, mm7 ; mm5=data0=(00 10 20 30) 697 packssdw mm2, mm0 ; mm2=data7=(07 17 27 37) 698 699 movq mm4, MMWORD [wk(4)] ; mm4=tmp11L 700 movq mm3, MMWORD [wk(5)] ; mm3=tmp11H 701 702 movq mm7, mm4 703 movq mm0, mm3 704 paddd mm4, mm1 ; mm4=data1L 705 paddd mm3, mm6 ; mm3=data1H 706 psubd mm7, mm1 ; mm7=data6L 707 psubd mm0, mm6 ; mm0=data6H 708 709 movq mm1, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm1=[PD_DESCALE_P2] 710 711 paddd mm4, mm1 712 paddd mm3, mm1 713 psrad mm4, DESCALE_P2 714 psrad mm3, DESCALE_P2 715 paddd mm7, mm1 716 paddd mm0, mm1 717 psrad mm7, DESCALE_P2 718 psrad mm0, DESCALE_P2 719 720 packssdw mm4, mm3 ; mm4=data1=(01 11 21 31) 721 packssdw mm7, mm0 ; mm7=data6=(06 16 26 36) 722 723 packsswb mm5, mm7 ; mm5=(00 10 20 30 06 16 26 36) 724 packsswb mm4, mm2 ; mm4=(01 11 21 31 07 17 27 37) 725 726 movq mm6, MMWORD [wk(6)] ; mm6=tmp12L 727 movq mm1, MMWORD [wk(7)] ; mm1=tmp12H 728 movq mm3, MMWORD [wk(10)] ; mm3=tmp1L 729 movq mm0, MMWORD [wk(11)] ; mm0=tmp1H 730 731 movq MMWORD [wk(0)], mm5 ; wk(0)=(00 10 20 30 06 16 26 36) 732 movq MMWORD [wk(1)], mm4 ; wk(1)=(01 11 21 31 07 17 27 37) 733 734 movq mm7, mm6 735 movq mm2, mm1 736 paddd mm6, mm3 ; mm6=data2L 737 paddd mm1, mm0 ; mm1=data2H 738 psubd mm7, mm3 ; mm7=data5L 739 psubd mm2, mm0 ; mm2=data5H 740 741 movq mm5, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm5=[PD_DESCALE_P2] 742 743 paddd mm6, mm5 744 paddd mm1, mm5 745 psrad mm6, DESCALE_P2 746 psrad mm1, DESCALE_P2 747 paddd mm7, mm5 748 paddd mm2, mm5 749 psrad mm7, DESCALE_P2 750 psrad mm2, DESCALE_P2 751 752 packssdw mm6, mm1 ; mm6=data2=(02 12 22 32) 753 packssdw mm7, mm2 ; mm7=data5=(05 15 25 35) 754 755 movq mm4, MMWORD [wk(2)] ; mm4=tmp13L 756 movq mm3, MMWORD [wk(3)] ; mm3=tmp13H 757 movq mm0, MMWORD [wk(8)] ; mm0=tmp0L 758 movq mm5, MMWORD [wk(9)] ; mm5=tmp0H 759 760 movq mm1, mm4 761 movq mm2, mm3 762 paddd mm4, mm0 ; mm4=data3L 763 paddd mm3, mm5 ; mm3=data3H 764 psubd mm1, mm0 ; mm1=data4L 765 psubd mm2, mm5 ; mm2=data4H 766 767 movq mm0, [GOTOFF(ebx,PD_DESCALE_P2)] ; mm0=[PD_DESCALE_P2] 768 769 paddd mm4, mm0 770 paddd mm3, mm0 771 psrad mm4, DESCALE_P2 772 psrad mm3, DESCALE_P2 773 paddd mm1, mm0 774 paddd mm2, mm0 775 psrad mm1, DESCALE_P2 776 psrad mm2, DESCALE_P2 777 778 movq mm5, [GOTOFF(ebx,PB_CENTERJSAMP)] ; mm5=[PB_CENTERJSAMP] 779 780 packssdw mm4, mm3 ; mm4=data3=(03 13 23 33) 781 packssdw mm1, mm2 ; mm1=data4=(04 14 24 34) 782 783 movq mm0, MMWORD [wk(0)] ; mm0=(00 10 20 30 06 16 26 36) 784 movq mm3, MMWORD [wk(1)] ; mm3=(01 11 21 31 07 17 27 37) 785 786 packsswb mm6, mm1 ; mm6=(02 12 22 32 04 14 24 34) 787 packsswb mm4, mm7 ; mm4=(03 13 23 33 05 15 25 35) 788 789 paddb mm0, mm5 790 paddb mm3, mm5 791 paddb mm6, mm5 792 paddb mm4, mm5 793 794 movq mm2, mm0 ; transpose coefficients(phase 1) 795 punpcklbw mm0, mm3 ; mm0=(00 01 10 11 20 21 30 31) 796 punpckhbw mm2, mm3 ; mm2=(06 07 16 17 26 27 36 37) 797 movq mm1, mm6 ; transpose coefficients(phase 1) 798 punpcklbw mm6, mm4 ; mm6=(02 03 12 13 22 23 32 33) 799 punpckhbw mm1, mm4 ; mm1=(04 05 14 15 24 25 34 35) 800 801 movq mm7, mm0 ; transpose coefficients(phase 2) 802 punpcklwd mm0, mm6 ; mm0=(00 01 02 03 10 11 12 13) 803 punpckhwd mm7, mm6 ; mm7=(20 21 22 23 30 31 32 33) 804 movq mm5, mm1 ; transpose coefficients(phase 2) 805 punpcklwd mm1, mm2 ; mm1=(04 05 06 07 14 15 16 17) 806 punpckhwd mm5, mm2 ; mm5=(24 25 26 27 34 35 36 37) 807 808 movq mm3, mm0 ; transpose coefficients(phase 3) 809 punpckldq mm0, mm1 ; mm0=(00 01 02 03 04 05 06 07) 810 punpckhdq mm3, mm1 ; mm3=(10 11 12 13 14 15 16 17) 811 movq mm4, mm7 ; transpose coefficients(phase 3) 812 punpckldq mm7, mm5 ; mm7=(20 21 22 23 24 25 26 27) 813 punpckhdq mm4, mm5 ; mm4=(30 31 32 33 34 35 36 37) 814 815 PUSHPIC ebx ; save GOT address 816 817 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] 818 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] 819 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 820 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm3 821 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] 822 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] 823 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm7 824 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 825 826 POPPIC ebx ; restore GOT address 827 828 add esi, byte 4*SIZEOF_JCOEF ; wsptr 829 add edi, byte 4*SIZEOF_JSAMPROW 830 dec ecx ; ctr 831 jnz near .rowloop 832 833 emms ; empty MMX state 834 835 pop edi 836 pop esi 837 ; pop edx ; need not be preserved 838 ; pop ecx ; need not be preserved 839 pop ebx 840 mov esp, ebp ; esp <- aligned ebp 841 pop esp ; esp <- original ebp 842 pop ebp 843 ret 844 845 ; For some reason, the OS X linker does not honor the request to align the 846 ; segment unless we do this. 847 align 32