| 1 | /* pngvcrd.c - mixed C/assembler version of utilities to read a PNG file |
| 2 | * |
| 3 | * For Intel x86 CPU and Microsoft Visual C++ compiler |
| 4 | * |
| 5 | * libpng version 1.2.7 - September 12, 2004 |
| 6 | * For conditions of distribution and use, see copyright notice in png.h |
| 7 | * Copyright (c) 1998-2004 Glenn Randers-Pehrson |
| 8 | * Copyright (c) 1998, Intel Corporation |
| 9 | * |
| 10 | * Contributed by Nirav Chhatrapati, Intel Corporation, 1998 |
| 11 | * Interface to libpng contributed by Gilles Vollant, 1999 |
| 12 | * |
| 13 | * |
| 14 | * In png_do_read_interlace() in libpng versions 1.0.3a through 1.0.4d, |
| 15 | * a sign error in the post-MMX cleanup code for each pixel_depth resulted |
| 16 | * in bad pixels at the beginning of some rows of some images, and also |
| 17 | * (due to out-of-range memory reads and writes) caused heap corruption |
| 18 | * when compiled with MSVC 6.0. The error was fixed in version 1.0.4e. |
| 19 | * |
| 20 | * [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916] |
| 21 | * |
| 22 | * [runtime MMX configuration, GRR 20010102] |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #define PNG_INTERNAL |
| 27 | #include "png.h" |
| 28 | |
| 29 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD) |
| 30 | |
| 31 | static int mmx_supported=2; |
| 32 | |
| 33 | |
| 34 | int PNGAPI |
| 35 | png_mmx_support(void) |
| 36 | { |
| 37 | int mmx_supported_local = 0; |
| 38 | _asm { |
| 39 | push ebx /*CPUID will trash these */ |
| 40 | push ecx |
| 41 | push edx |
| 42 | |
| 43 | pushfd /*Save Eflag to stack */ |
| 44 | pop eax /*Get Eflag from stack into eax */ |
| 45 | mov ecx, eax /*Make another copy of Eflag in ecx */ |
| 46 | xor eax, 0x200000 /*Toggle ID bit in Eflag [i.e. bit(21)] */ |
| 47 | push eax /*Save modified Eflag back to stack */ |
| 48 | |
| 49 | popfd /*Restored modified value back to Eflag reg */ |
| 50 | pushfd /*Save Eflag to stack */ |
| 51 | pop eax /*Get Eflag from stack */ |
| 52 | push ecx /* save original Eflag to stack */ |
| 53 | popfd /* restore original Eflag */ |
| 54 | xor eax, ecx /*Compare the new Eflag with the original Eflag */ |
| 55 | jz NOT_SUPPORTED /*If the same, CPUID instruction is not supported, */ |
| 56 | /*skip following instructions and jump to */ |
| 57 | /*NOT_SUPPORTED label */ |
| 58 | |
| 59 | xor eax, eax /*Set eax to zero */ |
| 60 | |
| 61 | _asm _emit 0x0f /*CPUID instruction (two bytes opcode) */ |
| 62 | _asm _emit 0xa2 |
| 63 | |
| 64 | cmp eax, 1 /*make sure eax return non-zero value */ |
| 65 | jl NOT_SUPPORTED /*If eax is zero, mmx not supported */ |
| 66 | |
| 67 | xor eax, eax /*set eax to zero */ |
| 68 | inc eax /*Now increment eax to 1. This instruction is */ |
| 69 | /*faster than the instruction "mov eax, 1" */ |
| 70 | |
| 71 | _asm _emit 0x0f /*CPUID instruction */ |
| 72 | _asm _emit 0xa2 |
| 73 | |
| 74 | and edx, 0x00800000 /*mask out all bits but mmx bit(24) */ |
| 75 | cmp edx, 0 /* 0 = mmx not supported */ |
| 76 | jz NOT_SUPPORTED /* non-zero = Yes, mmx IS supported */ |
| 77 | |
| 78 | mov mmx_supported_local, 1 /*set return value to 1 */ |
| 79 | |
| 80 | NOT_SUPPORTED: |
| 81 | mov eax, mmx_supported_local /*move return value to eax */ |
| 82 | pop edx /*CPUID trashed these */ |
| 83 | pop ecx |
| 84 | pop ebx |
| 85 | } |
| 86 | |
| 87 | /*mmx_supported_local=0; // test code for force don't support MMX */ |
| 88 | /*printf("MMX : %u (1=MMX supported)\n",mmx_supported_local); */ |
| 89 | |
| 90 | mmx_supported = mmx_supported_local; |
| 91 | return mmx_supported_local; |
| 92 | } |
| 93 | |
| 94 | /* Combines the row recently read in with the previous row. |
| 95 | This routine takes care of alpha and transparency if requested. |
| 96 | This routine also handles the two methods of progressive display |
| 97 | of interlaced images, depending on the mask value. |
| 98 | The mask value describes which pixels are to be combined with |
| 99 | the row. The pattern always repeats every 8 pixels, so just 8 |
| 100 | bits are needed. A one indicates the pixel is to be combined; a |
| 101 | zero indicates the pixel is to be skipped. This is in addition |
| 102 | to any alpha or transparency value associated with the pixel. If |
| 103 | you want all pixels to be combined, pass 0xff (255) in mask. */ |
| 104 | |
| 105 | /* Use this routine for x86 platform - uses faster MMX routine if machine |
| 106 | supports MMX */ |
| 107 | |
| 108 | void /* PRIVATE */ |
| 109 | png_combine_row(png_structp png_ptr, png_bytep row, int mask) |
| 110 | { |
| 111 | #ifdef PNG_USE_LOCAL_ARRAYS |
| 112 | const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; |
| 113 | #endif |
| 114 | |
| 115 | png_debug(1,"in png_combine_row_asm\n"); |
| 116 | |
| 117 | if (mmx_supported == 2) { |
| 118 | #if !defined(PNG_1_0_X) |
| 119 | /* this should have happened in png_init_mmx_flags() already */ |
| 120 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 121 | #endif |
| 122 | png_mmx_support(); |
| 123 | } |
| 124 | |
| 125 | if (mask == 0xff) |
| 126 | { |
| 127 | png_memcpy(row, png_ptr->row_buf + 1, |
| 128 | (png_size_t)PNG_ROWBYTES(png_ptr->row_info.pixel_depth, |
| 129 | png_ptr->width)); |
| 130 | } |
| 131 | /* GRR: add "else if (mask == 0)" case? |
| 132 | * or does png_combine_row() not even get called in that case? */ |
| 133 | else |
| 134 | { |
| 135 | switch (png_ptr->row_info.pixel_depth) |
| 136 | { |
| 137 | case 1: |
| 138 | { |
| 139 | png_bytep sp; |
| 140 | png_bytep dp; |
| 141 | int s_inc, s_start, s_end; |
| 142 | int m; |
| 143 | int shift; |
| 144 | png_uint_32 i; |
| 145 | |
| 146 | sp = png_ptr->row_buf + 1; |
| 147 | dp = row; |
| 148 | m = 0x80; |
| 149 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 150 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 151 | { |
| 152 | s_start = 0; |
| 153 | s_end = 7; |
| 154 | s_inc = 1; |
| 155 | } |
| 156 | else |
| 157 | #endif |
| 158 | { |
| 159 | s_start = 7; |
| 160 | s_end = 0; |
| 161 | s_inc = -1; |
| 162 | } |
| 163 | |
| 164 | shift = s_start; |
| 165 | |
| 166 | for (i = 0; i < png_ptr->width; i++) |
| 167 | { |
| 168 | if (m & mask) |
| 169 | { |
| 170 | int value; |
| 171 | |
| 172 | value = (*sp >> shift) & 0x1; |
| 173 | *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); |
| 174 | *dp |= (png_byte)(value << shift); |
| 175 | } |
| 176 | |
| 177 | if (shift == s_end) |
| 178 | { |
| 179 | shift = s_start; |
| 180 | sp++; |
| 181 | dp++; |
| 182 | } |
| 183 | else |
| 184 | shift += s_inc; |
| 185 | |
| 186 | if (m == 1) |
| 187 | m = 0x80; |
| 188 | else |
| 189 | m >>= 1; |
| 190 | } |
| 191 | break; |
| 192 | } |
| 193 | |
| 194 | case 2: |
| 195 | { |
| 196 | png_bytep sp; |
| 197 | png_bytep dp; |
| 198 | int s_start, s_end, s_inc; |
| 199 | int m; |
| 200 | int shift; |
| 201 | png_uint_32 i; |
| 202 | int value; |
| 203 | |
| 204 | sp = png_ptr->row_buf + 1; |
| 205 | dp = row; |
| 206 | m = 0x80; |
| 207 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 208 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 209 | { |
| 210 | s_start = 0; |
| 211 | s_end = 6; |
| 212 | s_inc = 2; |
| 213 | } |
| 214 | else |
| 215 | #endif |
| 216 | { |
| 217 | s_start = 6; |
| 218 | s_end = 0; |
| 219 | s_inc = -2; |
| 220 | } |
| 221 | |
| 222 | shift = s_start; |
| 223 | |
| 224 | for (i = 0; i < png_ptr->width; i++) |
| 225 | { |
| 226 | if (m & mask) |
| 227 | { |
| 228 | value = (*sp >> shift) & 0x3; |
| 229 | *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); |
| 230 | *dp |= (png_byte)(value << shift); |
| 231 | } |
| 232 | |
| 233 | if (shift == s_end) |
| 234 | { |
| 235 | shift = s_start; |
| 236 | sp++; |
| 237 | dp++; |
| 238 | } |
| 239 | else |
| 240 | shift += s_inc; |
| 241 | if (m == 1) |
| 242 | m = 0x80; |
| 243 | else |
| 244 | m >>= 1; |
| 245 | } |
| 246 | break; |
| 247 | } |
| 248 | |
| 249 | case 4: |
| 250 | { |
| 251 | png_bytep sp; |
| 252 | png_bytep dp; |
| 253 | int s_start, s_end, s_inc; |
| 254 | int m; |
| 255 | int shift; |
| 256 | png_uint_32 i; |
| 257 | int value; |
| 258 | |
| 259 | sp = png_ptr->row_buf + 1; |
| 260 | dp = row; |
| 261 | m = 0x80; |
| 262 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 263 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 264 | { |
| 265 | s_start = 0; |
| 266 | s_end = 4; |
| 267 | s_inc = 4; |
| 268 | } |
| 269 | else |
| 270 | #endif |
| 271 | { |
| 272 | s_start = 4; |
| 273 | s_end = 0; |
| 274 | s_inc = -4; |
| 275 | } |
| 276 | shift = s_start; |
| 277 | |
| 278 | for (i = 0; i < png_ptr->width; i++) |
| 279 | { |
| 280 | if (m & mask) |
| 281 | { |
| 282 | value = (*sp >> shift) & 0xf; |
| 283 | *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); |
| 284 | *dp |= (png_byte)(value << shift); |
| 285 | } |
| 286 | |
| 287 | if (shift == s_end) |
| 288 | { |
| 289 | shift = s_start; |
| 290 | sp++; |
| 291 | dp++; |
| 292 | } |
| 293 | else |
| 294 | shift += s_inc; |
| 295 | if (m == 1) |
| 296 | m = 0x80; |
| 297 | else |
| 298 | m >>= 1; |
| 299 | } |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | case 8: |
| 304 | { |
| 305 | png_bytep srcptr; |
| 306 | png_bytep dstptr; |
| 307 | png_uint_32 len; |
| 308 | int m; |
| 309 | int diff, unmask; |
| 310 | |
| 311 | __int64 mask0=0x0102040810204080; |
| 312 | |
| 313 | #if !defined(PNG_1_0_X) |
| 314 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 315 | /* && mmx_supported */ ) |
| 316 | #else |
| 317 | if (mmx_supported) |
| 318 | #endif |
| 319 | { |
| 320 | srcptr = png_ptr->row_buf + 1; |
| 321 | dstptr = row; |
| 322 | m = 0x80; |
| 323 | unmask = ~mask; |
| 324 | len = png_ptr->width &~7; /*reduce to multiple of 8 */ |
| 325 | diff = png_ptr->width & 7; /*amount lost */ |
| 326 | |
| 327 | _asm |
| 328 | { |
| 329 | movd mm7, unmask /*load bit pattern */ |
| 330 | psubb mm6,mm6 /*zero mm6 */ |
| 331 | punpcklbw mm7,mm7 |
| 332 | punpcklwd mm7,mm7 |
| 333 | punpckldq mm7,mm7 /*fill register with 8 masks */ |
| 334 | |
| 335 | movq mm0,mask0 |
| 336 | |
| 337 | pand mm0,mm7 /*nonzero if keep byte */ |
| 338 | pcmpeqb mm0,mm6 /*zeros->1s, v versa */ |
| 339 | |
| 340 | mov ecx,len /*load length of line (pixels) */ |
| 341 | mov esi,srcptr /*load source */ |
| 342 | mov ebx,dstptr /*load dest */ |
| 343 | cmp ecx,0 /*lcr */ |
| 344 | je mainloop8end |
| 345 | |
| 346 | mainloop8: |
| 347 | movq mm4,[esi] |
| 348 | pand mm4,mm0 |
| 349 | movq mm6,mm0 |
| 350 | pandn mm6,[ebx] |
| 351 | por mm4,mm6 |
| 352 | movq [ebx],mm4 |
| 353 | |
| 354 | add esi,8 /*inc by 8 bytes processed */ |
| 355 | add ebx,8 |
| 356 | sub ecx,8 /*dec by 8 pixels processed */ |
| 357 | |
| 358 | ja mainloop8 |
| 359 | mainloop8end: |
| 360 | |
| 361 | mov ecx,diff |
| 362 | cmp ecx,0 |
| 363 | jz end8 |
| 364 | |
| 365 | mov edx,mask |
| 366 | sal edx,24 /*make low byte the high byte */ |
| 367 | |
| 368 | secondloop8: |
| 369 | sal edx,1 /*move high bit to CF */ |
| 370 | jnc skip8 /*if CF = 0 */ |
| 371 | mov al,[esi] |
| 372 | mov [ebx],al |
| 373 | skip8: |
| 374 | inc esi |
| 375 | inc ebx |
| 376 | |
| 377 | dec ecx |
| 378 | jnz secondloop8 |
| 379 | end8: |
| 380 | emms |
| 381 | } |
| 382 | } |
| 383 | else /* mmx not supported - use modified C routine */ |
| 384 | { |
| 385 | register unsigned int incr1, initial_val, final_val; |
| 386 | png_size_t pixel_bytes; |
| 387 | png_uint_32 i; |
| 388 | register int disp = png_pass_inc[png_ptr->pass]; |
| 389 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 390 | |
| 391 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 392 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 393 | pixel_bytes; |
| 394 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 395 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 396 | final_val = png_ptr->width*pixel_bytes; |
| 397 | incr1 = (disp)*pixel_bytes; |
| 398 | for (i = initial_val; i < final_val; i += incr1) |
| 399 | { |
| 400 | png_memcpy(dstptr, srcptr, pixel_bytes); |
| 401 | srcptr += incr1; |
| 402 | dstptr += incr1; |
| 403 | } |
| 404 | } /* end of else */ |
| 405 | |
| 406 | break; |
| 407 | } /* end 8 bpp */ |
| 408 | |
| 409 | case 16: |
| 410 | { |
| 411 | png_bytep srcptr; |
| 412 | png_bytep dstptr; |
| 413 | png_uint_32 len; |
| 414 | int unmask, diff; |
| 415 | __int64 mask1=0x0101020204040808, |
| 416 | mask0=0x1010202040408080; |
| 417 | |
| 418 | #if !defined(PNG_1_0_X) |
| 419 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 420 | /* && mmx_supported */ ) |
| 421 | #else |
| 422 | if (mmx_supported) |
| 423 | #endif |
| 424 | { |
| 425 | srcptr = png_ptr->row_buf + 1; |
| 426 | dstptr = row; |
| 427 | |
| 428 | unmask = ~mask; |
| 429 | len = (png_ptr->width)&~7; |
| 430 | diff = (png_ptr->width)&7; |
| 431 | _asm |
| 432 | { |
| 433 | movd mm7, unmask /*load bit pattern */ |
| 434 | psubb mm6,mm6 /*zero mm6 */ |
| 435 | punpcklbw mm7,mm7 |
| 436 | punpcklwd mm7,mm7 |
| 437 | punpckldq mm7,mm7 /*fill register with 8 masks */ |
| 438 | |
| 439 | movq mm0,mask0 |
| 440 | movq mm1,mask1 |
| 441 | |
| 442 | pand mm0,mm7 |
| 443 | pand mm1,mm7 |
| 444 | |
| 445 | pcmpeqb mm0,mm6 |
| 446 | pcmpeqb mm1,mm6 |
| 447 | |
| 448 | mov ecx,len /*load length of line */ |
| 449 | mov esi,srcptr /*load source */ |
| 450 | mov ebx,dstptr /*load dest */ |
| 451 | cmp ecx,0 /*lcr */ |
| 452 | jz mainloop16end |
| 453 | |
| 454 | mainloop16: |
| 455 | movq mm4,[esi] |
| 456 | pand mm4,mm0 |
| 457 | movq mm6,mm0 |
| 458 | movq mm7,[ebx] |
| 459 | pandn mm6,mm7 |
| 460 | por mm4,mm6 |
| 461 | movq [ebx],mm4 |
| 462 | |
| 463 | movq mm5,[esi+8] |
| 464 | pand mm5,mm1 |
| 465 | movq mm7,mm1 |
| 466 | movq mm6,[ebx+8] |
| 467 | pandn mm7,mm6 |
| 468 | por mm5,mm7 |
| 469 | movq [ebx+8],mm5 |
| 470 | |
| 471 | add esi,16 /*inc by 16 bytes processed */ |
| 472 | add ebx,16 |
| 473 | sub ecx,8 /*dec by 8 pixels processed */ |
| 474 | |
| 475 | ja mainloop16 |
| 476 | |
| 477 | mainloop16end: |
| 478 | mov ecx,diff |
| 479 | cmp ecx,0 |
| 480 | jz end16 |
| 481 | |
| 482 | mov edx,mask |
| 483 | sal edx,24 /*make low byte the high byte */ |
| 484 | secondloop16: |
| 485 | sal edx,1 /*move high bit to CF */ |
| 486 | jnc skip16 /*if CF = 0 */ |
| 487 | mov ax,[esi] |
| 488 | mov [ebx],ax |
| 489 | skip16: |
| 490 | add esi,2 |
| 491 | add ebx,2 |
| 492 | |
| 493 | dec ecx |
| 494 | jnz secondloop16 |
| 495 | end16: |
| 496 | emms |
| 497 | } |
| 498 | } |
| 499 | else /* mmx not supported - use modified C routine */ |
| 500 | { |
| 501 | register unsigned int incr1, initial_val, final_val; |
| 502 | png_size_t pixel_bytes; |
| 503 | png_uint_32 i; |
| 504 | register int disp = png_pass_inc[png_ptr->pass]; |
| 505 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 506 | |
| 507 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 508 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 509 | pixel_bytes; |
| 510 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 511 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 512 | final_val = png_ptr->width*pixel_bytes; |
| 513 | incr1 = (disp)*pixel_bytes; |
| 514 | for (i = initial_val; i < final_val; i += incr1) |
| 515 | { |
| 516 | png_memcpy(dstptr, srcptr, pixel_bytes); |
| 517 | srcptr += incr1; |
| 518 | dstptr += incr1; |
| 519 | } |
| 520 | } /* end of else */ |
| 521 | |
| 522 | break; |
| 523 | } /* end 16 bpp */ |
| 524 | |
| 525 | case 24: |
| 526 | { |
| 527 | png_bytep srcptr; |
| 528 | png_bytep dstptr; |
| 529 | png_uint_32 len; |
| 530 | int unmask, diff; |
| 531 | |
| 532 | __int64 mask2=0x0101010202020404, /*24bpp */ |
| 533 | mask1=0x0408080810101020, |
| 534 | mask0=0x2020404040808080; |
| 535 | |
| 536 | srcptr = png_ptr->row_buf + 1; |
| 537 | dstptr = row; |
| 538 | |
| 539 | unmask = ~mask; |
| 540 | len = (png_ptr->width)&~7; |
| 541 | diff = (png_ptr->width)&7; |
| 542 | |
| 543 | #if !defined(PNG_1_0_X) |
| 544 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 545 | /* && mmx_supported */ ) |
| 546 | #else |
| 547 | if (mmx_supported) |
| 548 | #endif |
| 549 | { |
| 550 | _asm |
| 551 | { |
| 552 | movd mm7, unmask /*load bit pattern */ |
| 553 | psubb mm6,mm6 /*zero mm6 */ |
| 554 | punpcklbw mm7,mm7 |
| 555 | punpcklwd mm7,mm7 |
| 556 | punpckldq mm7,mm7 /*fill register with 8 masks */ |
| 557 | |
| 558 | movq mm0,mask0 |
| 559 | movq mm1,mask1 |
| 560 | movq mm2,mask2 |
| 561 | |
| 562 | pand mm0,mm7 |
| 563 | pand mm1,mm7 |
| 564 | pand mm2,mm7 |
| 565 | |
| 566 | pcmpeqb mm0,mm6 |
| 567 | pcmpeqb mm1,mm6 |
| 568 | pcmpeqb mm2,mm6 |
| 569 | |
| 570 | mov ecx,len /*load length of line */ |
| 571 | mov esi,srcptr /*load source */ |
| 572 | mov ebx,dstptr /*load dest */ |
| 573 | cmp ecx,0 |
| 574 | jz mainloop24end |
| 575 | |
| 576 | mainloop24: |
| 577 | movq mm4,[esi] |
| 578 | pand mm4,mm0 |
| 579 | movq mm6,mm0 |
| 580 | movq mm7,[ebx] |
| 581 | pandn mm6,mm7 |
| 582 | por mm4,mm6 |
| 583 | movq [ebx],mm4 |
| 584 | |
| 585 | |
| 586 | movq mm5,[esi+8] |
| 587 | pand mm5,mm1 |
| 588 | movq mm7,mm1 |
| 589 | movq mm6,[ebx+8] |
| 590 | pandn mm7,mm6 |
| 591 | por mm5,mm7 |
| 592 | movq [ebx+8],mm5 |
| 593 | |
| 594 | movq mm6,[esi+16] |
| 595 | pand mm6,mm2 |
| 596 | movq mm4,mm2 |
| 597 | movq mm7,[ebx+16] |
| 598 | pandn mm4,mm7 |
| 599 | por mm6,mm4 |
| 600 | movq [ebx+16],mm6 |
| 601 | |
| 602 | add esi,24 /*inc by 24 bytes processed */ |
| 603 | add ebx,24 |
| 604 | sub ecx,8 /*dec by 8 pixels processed */ |
| 605 | |
| 606 | ja mainloop24 |
| 607 | |
| 608 | mainloop24end: |
| 609 | mov ecx,diff |
| 610 | cmp ecx,0 |
| 611 | jz end24 |
| 612 | |
| 613 | mov edx,mask |
| 614 | sal edx,24 /*make low byte the high byte */ |
| 615 | secondloop24: |
| 616 | sal edx,1 /*move high bit to CF */ |
| 617 | jnc skip24 /*if CF = 0 */ |
| 618 | mov ax,[esi] |
| 619 | mov [ebx],ax |
| 620 | xor eax,eax |
| 621 | mov al,[esi+2] |
| 622 | mov [ebx+2],al |
| 623 | skip24: |
| 624 | add esi,3 |
| 625 | add ebx,3 |
| 626 | |
| 627 | dec ecx |
| 628 | jnz secondloop24 |
| 629 | |
| 630 | end24: |
| 631 | emms |
| 632 | } |
| 633 | } |
| 634 | else /* mmx not supported - use modified C routine */ |
| 635 | { |
| 636 | register unsigned int incr1, initial_val, final_val; |
| 637 | png_size_t pixel_bytes; |
| 638 | png_uint_32 i; |
| 639 | register int disp = png_pass_inc[png_ptr->pass]; |
| 640 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 641 | |
| 642 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 643 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 644 | pixel_bytes; |
| 645 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 646 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 647 | final_val = png_ptr->width*pixel_bytes; |
| 648 | incr1 = (disp)*pixel_bytes; |
| 649 | for (i = initial_val; i < final_val; i += incr1) |
| 650 | { |
| 651 | png_memcpy(dstptr, srcptr, pixel_bytes); |
| 652 | srcptr += incr1; |
| 653 | dstptr += incr1; |
| 654 | } |
| 655 | } /* end of else */ |
| 656 | |
| 657 | break; |
| 658 | } /* end 24 bpp */ |
| 659 | |
| 660 | case 32: |
| 661 | { |
| 662 | png_bytep srcptr; |
| 663 | png_bytep dstptr; |
| 664 | png_uint_32 len; |
| 665 | int unmask, diff; |
| 666 | |
| 667 | __int64 mask3=0x0101010102020202, /*32bpp */ |
| 668 | mask2=0x0404040408080808, |
| 669 | mask1=0x1010101020202020, |
| 670 | mask0=0x4040404080808080; |
| 671 | |
| 672 | srcptr = png_ptr->row_buf + 1; |
| 673 | dstptr = row; |
| 674 | |
| 675 | unmask = ~mask; |
| 676 | len = (png_ptr->width)&~7; |
| 677 | diff = (png_ptr->width)&7; |
| 678 | |
| 679 | #if !defined(PNG_1_0_X) |
| 680 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 681 | /* && mmx_supported */ ) |
| 682 | #else |
| 683 | if (mmx_supported) |
| 684 | #endif |
| 685 | { |
| 686 | _asm |
| 687 | { |
| 688 | movd mm7, unmask /*load bit pattern */ |
| 689 | psubb mm6,mm6 /*zero mm6 */ |
| 690 | punpcklbw mm7,mm7 |
| 691 | punpcklwd mm7,mm7 |
| 692 | punpckldq mm7,mm7 /*fill register with 8 masks */ |
| 693 | |
| 694 | movq mm0,mask0 |
| 695 | movq mm1,mask1 |
| 696 | movq mm2,mask2 |
| 697 | movq mm3,mask3 |
| 698 | |
| 699 | pand mm0,mm7 |
| 700 | pand mm1,mm7 |
| 701 | pand mm2,mm7 |
| 702 | pand mm3,mm7 |
| 703 | |
| 704 | pcmpeqb mm0,mm6 |
| 705 | pcmpeqb mm1,mm6 |
| 706 | pcmpeqb mm2,mm6 |
| 707 | pcmpeqb mm3,mm6 |
| 708 | |
| 709 | mov ecx,len /*load length of line */ |
| 710 | mov esi,srcptr /*load source */ |
| 711 | mov ebx,dstptr /*load dest */ |
| 712 | |
| 713 | cmp ecx,0 /*lcr */ |
| 714 | jz mainloop32end |
| 715 | |
| 716 | mainloop32: |
| 717 | movq mm4,[esi] |
| 718 | pand mm4,mm0 |
| 719 | movq mm6,mm0 |
| 720 | movq mm7,[ebx] |
| 721 | pandn mm6,mm7 |
| 722 | por mm4,mm6 |
| 723 | movq [ebx],mm4 |
| 724 | |
| 725 | movq mm5,[esi+8] |
| 726 | pand mm5,mm1 |
| 727 | movq mm7,mm1 |
| 728 | movq mm6,[ebx+8] |
| 729 | pandn mm7,mm6 |
| 730 | por mm5,mm7 |
| 731 | movq [ebx+8],mm5 |
| 732 | |
| 733 | movq mm6,[esi+16] |
| 734 | pand mm6,mm2 |
| 735 | movq mm4,mm2 |
| 736 | movq mm7,[ebx+16] |
| 737 | pandn mm4,mm7 |
| 738 | por mm6,mm4 |
| 739 | movq [ebx+16],mm6 |
| 740 | |
| 741 | movq mm7,[esi+24] |
| 742 | pand mm7,mm3 |
| 743 | movq mm5,mm3 |
| 744 | movq mm4,[ebx+24] |
| 745 | pandn mm5,mm4 |
| 746 | por mm7,mm5 |
| 747 | movq [ebx+24],mm7 |
| 748 | |
| 749 | add esi,32 /*inc by 32 bytes processed */ |
| 750 | add ebx,32 |
| 751 | sub ecx,8 /*dec by 8 pixels processed */ |
| 752 | |
| 753 | ja mainloop32 |
| 754 | |
| 755 | mainloop32end: |
| 756 | mov ecx,diff |
| 757 | cmp ecx,0 |
| 758 | jz end32 |
| 759 | |
| 760 | mov edx,mask |
| 761 | sal edx,24 /*make low byte the high byte */ |
| 762 | secondloop32: |
| 763 | sal edx,1 /*move high bit to CF */ |
| 764 | jnc skip32 /*if CF = 0 */ |
| 765 | mov eax,[esi] |
| 766 | mov [ebx],eax |
| 767 | skip32: |
| 768 | add esi,4 |
| 769 | add ebx,4 |
| 770 | |
| 771 | dec ecx |
| 772 | jnz secondloop32 |
| 773 | |
| 774 | end32: |
| 775 | emms |
| 776 | } |
| 777 | } |
| 778 | else /* mmx _not supported - Use modified C routine */ |
| 779 | { |
| 780 | register unsigned int incr1, initial_val, final_val; |
| 781 | png_size_t pixel_bytes; |
| 782 | png_uint_32 i; |
| 783 | register int disp = png_pass_inc[png_ptr->pass]; |
| 784 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 785 | |
| 786 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 787 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 788 | pixel_bytes; |
| 789 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 790 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 791 | final_val = png_ptr->width*pixel_bytes; |
| 792 | incr1 = (disp)*pixel_bytes; |
| 793 | for (i = initial_val; i < final_val; i += incr1) |
| 794 | { |
| 795 | png_memcpy(dstptr, srcptr, pixel_bytes); |
| 796 | srcptr += incr1; |
| 797 | dstptr += incr1; |
| 798 | } |
| 799 | } /* end of else */ |
| 800 | |
| 801 | break; |
| 802 | } /* end 32 bpp */ |
| 803 | |
| 804 | case 48: |
| 805 | { |
| 806 | png_bytep srcptr; |
| 807 | png_bytep dstptr; |
| 808 | png_uint_32 len; |
| 809 | int unmask, diff; |
| 810 | |
| 811 | __int64 mask5=0x0101010101010202, |
| 812 | mask4=0x0202020204040404, |
| 813 | mask3=0x0404080808080808, |
| 814 | mask2=0x1010101010102020, |
| 815 | mask1=0x2020202040404040, |
| 816 | mask0=0x4040808080808080; |
| 817 | |
| 818 | #if !defined(PNG_1_0_X) |
| 819 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 820 | /* && mmx_supported */ ) |
| 821 | #else |
| 822 | if (mmx_supported) |
| 823 | #endif |
| 824 | { |
| 825 | srcptr = png_ptr->row_buf + 1; |
| 826 | dstptr = row; |
| 827 | |
| 828 | unmask = ~mask; |
| 829 | len = (png_ptr->width)&~7; |
| 830 | diff = (png_ptr->width)&7; |
| 831 | _asm |
| 832 | { |
| 833 | movd mm7, unmask /*load bit pattern */ |
| 834 | psubb mm6,mm6 /*zero mm6 */ |
| 835 | punpcklbw mm7,mm7 |
| 836 | punpcklwd mm7,mm7 |
| 837 | punpckldq mm7,mm7 /*fill register with 8 masks */ |
| 838 | |
| 839 | movq mm0,mask0 |
| 840 | movq mm1,mask1 |
| 841 | movq mm2,mask2 |
| 842 | movq mm3,mask3 |
| 843 | movq mm4,mask4 |
| 844 | movq mm5,mask5 |
| 845 | |
| 846 | pand mm0,mm7 |
| 847 | pand mm1,mm7 |
| 848 | pand mm2,mm7 |
| 849 | pand mm3,mm7 |
| 850 | pand mm4,mm7 |
| 851 | pand mm5,mm7 |
| 852 | |
| 853 | pcmpeqb mm0,mm6 |
| 854 | pcmpeqb mm1,mm6 |
| 855 | pcmpeqb mm2,mm6 |
| 856 | pcmpeqb mm3,mm6 |
| 857 | pcmpeqb mm4,mm6 |
| 858 | pcmpeqb mm5,mm6 |
| 859 | |
| 860 | mov ecx,len /*load length of line */ |
| 861 | mov esi,srcptr /*load source */ |
| 862 | mov ebx,dstptr /*load dest */ |
| 863 | |
| 864 | cmp ecx,0 |
| 865 | jz mainloop48end |
| 866 | |
| 867 | mainloop48: |
| 868 | movq mm7,[esi] |
| 869 | pand mm7,mm0 |
| 870 | movq mm6,mm0 |
| 871 | pandn mm6,[ebx] |
| 872 | por mm7,mm6 |
| 873 | movq [ebx],mm7 |
| 874 | |
| 875 | movq mm6,[esi+8] |
| 876 | pand mm6,mm1 |
| 877 | movq mm7,mm1 |
| 878 | pandn mm7,[ebx+8] |
| 879 | por mm6,mm7 |
| 880 | movq [ebx+8],mm6 |
| 881 | |
| 882 | movq mm6,[esi+16] |
| 883 | pand mm6,mm2 |
| 884 | movq mm7,mm2 |
| 885 | pandn mm7,[ebx+16] |
| 886 | por mm6,mm7 |
| 887 | movq [ebx+16],mm6 |
| 888 | |
| 889 | movq mm7,[esi+24] |
| 890 | pand mm7,mm3 |
| 891 | movq mm6,mm3 |
| 892 | pandn mm6,[ebx+24] |
| 893 | por mm7,mm6 |
| 894 | movq [ebx+24],mm7 |
| 895 | |
| 896 | movq mm6,[esi+32] |
| 897 | pand mm6,mm4 |
| 898 | movq mm7,mm4 |
| 899 | pandn mm7,[ebx+32] |
| 900 | por mm6,mm7 |
| 901 | movq [ebx+32],mm6 |
| 902 | |
| 903 | movq mm7,[esi+40] |
| 904 | pand mm7,mm5 |
| 905 | movq mm6,mm5 |
| 906 | pandn mm6,[ebx+40] |
| 907 | por mm7,mm6 |
| 908 | movq [ebx+40],mm7 |
| 909 | |
| 910 | add esi,48 /*inc by 32 bytes processed */ |
| 911 | add ebx,48 |
| 912 | sub ecx,8 /*dec by 8 pixels processed */ |
| 913 | |
| 914 | ja mainloop48 |
| 915 | mainloop48end: |
| 916 | |
| 917 | mov ecx,diff |
| 918 | cmp ecx,0 |
| 919 | jz end48 |
| 920 | |
| 921 | mov edx,mask |
| 922 | sal edx,24 /*make low byte the high byte */ |
| 923 | |
| 924 | secondloop48: |
| 925 | sal edx,1 /*move high bit to CF */ |
| 926 | jnc skip48 /*if CF = 0 */ |
| 927 | mov eax,[esi] |
| 928 | mov [ebx],eax |
| 929 | skip48: |
| 930 | add esi,4 |
| 931 | add ebx,4 |
| 932 | |
| 933 | dec ecx |
| 934 | jnz secondloop48 |
| 935 | |
| 936 | end48: |
| 937 | emms |
| 938 | } |
| 939 | } |
| 940 | else /* mmx _not supported - Use modified C routine */ |
| 941 | { |
| 942 | register unsigned int incr1, initial_val, final_val; |
| 943 | png_size_t pixel_bytes; |
| 944 | png_uint_32 i; |
| 945 | register int disp = png_pass_inc[png_ptr->pass]; |
| 946 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 947 | |
| 948 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 949 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 950 | pixel_bytes; |
| 951 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 952 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 953 | final_val = png_ptr->width*pixel_bytes; |
| 954 | incr1 = (disp)*pixel_bytes; |
| 955 | for (i = initial_val; i < final_val; i += incr1) |
| 956 | { |
| 957 | png_memcpy(dstptr, srcptr, pixel_bytes); |
| 958 | srcptr += incr1; |
| 959 | dstptr += incr1; |
| 960 | } |
| 961 | } /* end of else */ |
| 962 | |
| 963 | break; |
| 964 | } /* end 48 bpp */ |
| 965 | |
| 966 | default: |
| 967 | { |
| 968 | png_bytep sptr; |
| 969 | png_bytep dp; |
| 970 | png_size_t pixel_bytes; |
| 971 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 972 | unsigned int i; |
| 973 | register int disp = png_pass_inc[png_ptr->pass]; /* get the offset */ |
| 974 | register unsigned int incr1, initial_val, final_val; |
| 975 | |
| 976 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
| 977 | sptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
| 978 | pixel_bytes; |
| 979 | dp = row + offset_table[png_ptr->pass]*pixel_bytes; |
| 980 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
| 981 | final_val = png_ptr->width*pixel_bytes; |
| 982 | incr1 = (disp)*pixel_bytes; |
| 983 | for (i = initial_val; i < final_val; i += incr1) |
| 984 | { |
| 985 | png_memcpy(dp, sptr, pixel_bytes); |
| 986 | sptr += incr1; |
| 987 | dp += incr1; |
| 988 | } |
| 989 | break; |
| 990 | } |
| 991 | } /* end switch (png_ptr->row_info.pixel_depth) */ |
| 992 | } /* end if (non-trivial mask) */ |
| 993 | |
| 994 | } /* end png_combine_row() */ |
| 995 | |
| 996 | |
| 997 | #if defined(PNG_READ_INTERLACING_SUPPORTED) |
| 998 | |
| 999 | void /* PRIVATE */ |
| 1000 | png_do_read_interlace(png_structp png_ptr) |
| 1001 | { |
| 1002 | png_row_infop row_info = &(png_ptr->row_info); |
| 1003 | png_bytep row = png_ptr->row_buf + 1; |
| 1004 | int pass = png_ptr->pass; |
| 1005 | png_uint_32 transformations = png_ptr->transformations; |
| 1006 | #ifdef PNG_USE_LOCAL_ARRAYS |
| 1007 | const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; |
| 1008 | #endif |
| 1009 | |
| 1010 | png_debug(1,"in png_do_read_interlace\n"); |
| 1011 | |
| 1012 | if (mmx_supported == 2) { |
| 1013 | #if !defined(PNG_1_0_X) |
| 1014 | /* this should have happened in png_init_mmx_flags() already */ |
| 1015 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 1016 | #endif |
| 1017 | png_mmx_support(); |
| 1018 | } |
| 1019 | |
| 1020 | if (row != NULL && row_info != NULL) |
| 1021 | { |
| 1022 | png_uint_32 final_width; |
| 1023 | |
| 1024 | final_width = row_info->width * png_pass_inc[pass]; |
| 1025 | |
| 1026 | switch (row_info->pixel_depth) |
| 1027 | { |
| 1028 | case 1: |
| 1029 | { |
| 1030 | png_bytep sp, dp; |
| 1031 | int sshift, dshift; |
| 1032 | int s_start, s_end, s_inc; |
| 1033 | png_byte v; |
| 1034 | png_uint_32 i; |
| 1035 | int j; |
| 1036 | |
| 1037 | sp = row + (png_size_t)((row_info->width - 1) >> 3); |
| 1038 | dp = row + (png_size_t)((final_width - 1) >> 3); |
| 1039 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1040 | if (transformations & PNG_PACKSWAP) |
| 1041 | { |
| 1042 | sshift = (int)((row_info->width + 7) & 7); |
| 1043 | dshift = (int)((final_width + 7) & 7); |
| 1044 | s_start = 7; |
| 1045 | s_end = 0; |
| 1046 | s_inc = -1; |
| 1047 | } |
| 1048 | else |
| 1049 | #endif |
| 1050 | { |
| 1051 | sshift = 7 - (int)((row_info->width + 7) & 7); |
| 1052 | dshift = 7 - (int)((final_width + 7) & 7); |
| 1053 | s_start = 0; |
| 1054 | s_end = 7; |
| 1055 | s_inc = 1; |
| 1056 | } |
| 1057 | |
| 1058 | for (i = row_info->width; i; i--) |
| 1059 | { |
| 1060 | v = (png_byte)((*sp >> sshift) & 0x1); |
| 1061 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1062 | { |
| 1063 | *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); |
| 1064 | *dp |= (png_byte)(v << dshift); |
| 1065 | if (dshift == s_end) |
| 1066 | { |
| 1067 | dshift = s_start; |
| 1068 | dp--; |
| 1069 | } |
| 1070 | else |
| 1071 | dshift += s_inc; |
| 1072 | } |
| 1073 | if (sshift == s_end) |
| 1074 | { |
| 1075 | sshift = s_start; |
| 1076 | sp--; |
| 1077 | } |
| 1078 | else |
| 1079 | sshift += s_inc; |
| 1080 | } |
| 1081 | break; |
| 1082 | } |
| 1083 | |
| 1084 | case 2: |
| 1085 | { |
| 1086 | png_bytep sp, dp; |
| 1087 | int sshift, dshift; |
| 1088 | int s_start, s_end, s_inc; |
| 1089 | png_uint_32 i; |
| 1090 | |
| 1091 | sp = row + (png_size_t)((row_info->width - 1) >> 2); |
| 1092 | dp = row + (png_size_t)((final_width - 1) >> 2); |
| 1093 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1094 | if (transformations & PNG_PACKSWAP) |
| 1095 | { |
| 1096 | sshift = (png_size_t)(((row_info->width + 3) & 3) << 1); |
| 1097 | dshift = (png_size_t)(((final_width + 3) & 3) << 1); |
| 1098 | s_start = 6; |
| 1099 | s_end = 0; |
| 1100 | s_inc = -2; |
| 1101 | } |
| 1102 | else |
| 1103 | #endif |
| 1104 | { |
| 1105 | sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1); |
| 1106 | dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1); |
| 1107 | s_start = 0; |
| 1108 | s_end = 6; |
| 1109 | s_inc = 2; |
| 1110 | } |
| 1111 | |
| 1112 | for (i = row_info->width; i; i--) |
| 1113 | { |
| 1114 | png_byte v; |
| 1115 | int j; |
| 1116 | |
| 1117 | v = (png_byte)((*sp >> sshift) & 0x3); |
| 1118 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1119 | { |
| 1120 | *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); |
| 1121 | *dp |= (png_byte)(v << dshift); |
| 1122 | if (dshift == s_end) |
| 1123 | { |
| 1124 | dshift = s_start; |
| 1125 | dp--; |
| 1126 | } |
| 1127 | else |
| 1128 | dshift += s_inc; |
| 1129 | } |
| 1130 | if (sshift == s_end) |
| 1131 | { |
| 1132 | sshift = s_start; |
| 1133 | sp--; |
| 1134 | } |
| 1135 | else |
| 1136 | sshift += s_inc; |
| 1137 | } |
| 1138 | break; |
| 1139 | } |
| 1140 | |
| 1141 | case 4: |
| 1142 | { |
| 1143 | png_bytep sp, dp; |
| 1144 | int sshift, dshift; |
| 1145 | int s_start, s_end, s_inc; |
| 1146 | png_uint_32 i; |
| 1147 | |
| 1148 | sp = row + (png_size_t)((row_info->width - 1) >> 1); |
| 1149 | dp = row + (png_size_t)((final_width - 1) >> 1); |
| 1150 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1151 | if (transformations & PNG_PACKSWAP) |
| 1152 | { |
| 1153 | sshift = (png_size_t)(((row_info->width + 1) & 1) << 2); |
| 1154 | dshift = (png_size_t)(((final_width + 1) & 1) << 2); |
| 1155 | s_start = 4; |
| 1156 | s_end = 0; |
| 1157 | s_inc = -4; |
| 1158 | } |
| 1159 | else |
| 1160 | #endif |
| 1161 | { |
| 1162 | sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2); |
| 1163 | dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2); |
| 1164 | s_start = 0; |
| 1165 | s_end = 4; |
| 1166 | s_inc = 4; |
| 1167 | } |
| 1168 | |
| 1169 | for (i = row_info->width; i; i--) |
| 1170 | { |
| 1171 | png_byte v; |
| 1172 | int j; |
| 1173 | |
| 1174 | v = (png_byte)((*sp >> sshift) & 0xf); |
| 1175 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1176 | { |
| 1177 | *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); |
| 1178 | *dp |= (png_byte)(v << dshift); |
| 1179 | if (dshift == s_end) |
| 1180 | { |
| 1181 | dshift = s_start; |
| 1182 | dp--; |
| 1183 | } |
| 1184 | else |
| 1185 | dshift += s_inc; |
| 1186 | } |
| 1187 | if (sshift == s_end) |
| 1188 | { |
| 1189 | sshift = s_start; |
| 1190 | sp--; |
| 1191 | } |
| 1192 | else |
| 1193 | sshift += s_inc; |
| 1194 | } |
| 1195 | break; |
| 1196 | } |
| 1197 | |
| 1198 | default: /* This is the place where the routine is modified */ |
| 1199 | { |
| 1200 | __int64 const4 = 0x0000000000FFFFFF; |
| 1201 | /* __int64 const5 = 0x000000FFFFFF0000; // unused... */ |
| 1202 | __int64 const6 = 0x00000000000000FF; |
| 1203 | png_bytep sptr, dp; |
| 1204 | png_uint_32 i; |
| 1205 | png_size_t pixel_bytes; |
| 1206 | int width = row_info->width; |
| 1207 | |
| 1208 | pixel_bytes = (row_info->pixel_depth >> 3); |
| 1209 | |
| 1210 | sptr = row + (width - 1) * pixel_bytes; |
| 1211 | dp = row + (final_width - 1) * pixel_bytes; |
| 1212 | /* New code by Nirav Chhatrapati - Intel Corporation */ |
| 1213 | /* sign fix by GRR */ |
| 1214 | /* NOTE: there is NO MMX code for 48-bit and 64-bit images */ |
| 1215 | |
| 1216 | // use MMX routine if machine supports it |
| 1217 | #if !defined(PNG_1_0_X) |
| 1218 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE) |
| 1219 | /* && mmx_supported */ ) |
| 1220 | #else |
| 1221 | if (mmx_supported) |
| 1222 | #endif |
| 1223 | { |
| 1224 | if (pixel_bytes == 3) |
| 1225 | { |
| 1226 | if (((pass == 0) || (pass == 1)) && width) |
| 1227 | { |
| 1228 | _asm |
| 1229 | { |
| 1230 | mov esi, sptr |
| 1231 | mov edi, dp |
| 1232 | mov ecx, width |
| 1233 | sub edi, 21 /* (png_pass_inc[pass] - 1)*pixel_bytes */ |
| 1234 | loop_pass0: |
| 1235 | movd mm0, [esi] ; X X X X X v2 v1 v0 |
| 1236 | pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 |
| 1237 | movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 |
| 1238 | psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 |
| 1239 | movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 |
| 1240 | psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 |
| 1241 | psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 |
| 1242 | por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 |
| 1243 | por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 |
| 1244 | movq mm3, mm0 ; v2 v1 v0 v2 v1 v0 v2 v1 |
| 1245 | psllq mm0, 16 ; v0 v2 v1 v0 v2 v1 0 0 |
| 1246 | movq mm4, mm3 ; v2 v1 v0 v2 v1 v0 v2 v1 |
| 1247 | punpckhdq mm3, mm0 ; v0 v2 v1 v0 v2 v1 v0 v2 |
| 1248 | movq [edi+16] , mm4 |
| 1249 | psrlq mm0, 32 ; 0 0 0 0 v0 v2 v1 v0 |
| 1250 | movq [edi+8] , mm3 |
| 1251 | punpckldq mm0, mm4 ; v1 v0 v2 v1 v0 v2 v1 v0 |
| 1252 | sub esi, 3 |
| 1253 | movq [edi], mm0 |
| 1254 | sub edi, 24 |
| 1255 | /*sub esi, 3 */ |
| 1256 | dec ecx |
| 1257 | jnz loop_pass0 |
| 1258 | EMMS |
| 1259 | } |
| 1260 | } |
| 1261 | else if (((pass == 2) || (pass == 3)) && width) |
| 1262 | { |
| 1263 | _asm |
| 1264 | { |
| 1265 | mov esi, sptr |
| 1266 | mov edi, dp |
| 1267 | mov ecx, width |
| 1268 | sub edi, 9 /* (png_pass_inc[pass] - 1)*pixel_bytes */ |
| 1269 | loop_pass2: |
| 1270 | movd mm0, [esi] ; X X X X X v2 v1 v0 |
| 1271 | pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 |
| 1272 | movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 |
| 1273 | psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 |
| 1274 | movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 |
| 1275 | psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 |
| 1276 | psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 |
| 1277 | por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 |
| 1278 | por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 |
| 1279 | movq [edi+4], mm0 ; move to memory |
| 1280 | psrlq mm0, 16 ; 0 0 v2 v1 v0 v2 v1 v0 |
| 1281 | movd [edi], mm0 ; move to memory |
| 1282 | sub esi, 3 |
| 1283 | sub edi, 12 |
| 1284 | dec ecx |
| 1285 | jnz loop_pass2 |
| 1286 | EMMS |
| 1287 | } |
| 1288 | } |
| 1289 | else if (width) /* && ((pass == 4) || (pass == 5)) */ |
| 1290 | { |
| 1291 | int width_mmx = ((width >> 1) << 1) - 8; |
| 1292 | if (width_mmx < 0) |
| 1293 | width_mmx = 0; |
| 1294 | width -= width_mmx; /* 8 or 9 pix, 24 or 27 bytes */ |
| 1295 | if (width_mmx) |
| 1296 | { |
| 1297 | _asm |
| 1298 | { |
| 1299 | mov esi, sptr |
| 1300 | mov edi, dp |
| 1301 | mov ecx, width_mmx |
| 1302 | sub esi, 3 |
| 1303 | sub edi, 9 |
| 1304 | loop_pass4: |
| 1305 | movq mm0, [esi] ; X X v2 v1 v0 v5 v4 v3 |
| 1306 | movq mm7, mm0 ; X X v2 v1 v0 v5 v4 v3 |
| 1307 | movq mm6, mm0 ; X X v2 v1 v0 v5 v4 v3 |
| 1308 | psllq mm0, 24 ; v1 v0 v5 v4 v3 0 0 0 |
| 1309 | pand mm7, const4 ; 0 0 0 0 0 v5 v4 v3 |
| 1310 | psrlq mm6, 24 ; 0 0 0 X X v2 v1 v0 |
| 1311 | por mm0, mm7 ; v1 v0 v5 v4 v3 v5 v4 v3 |
| 1312 | movq mm5, mm6 ; 0 0 0 X X v2 v1 v0 |
| 1313 | psllq mm6, 8 ; 0 0 X X v2 v1 v0 0 |
| 1314 | movq [edi], mm0 ; move quad to memory |
| 1315 | psrlq mm5, 16 ; 0 0 0 0 0 X X v2 |
| 1316 | pand mm5, const6 ; 0 0 0 0 0 0 0 v2 |
| 1317 | por mm6, mm5 ; 0 0 X X v2 v1 v0 v2 |
| 1318 | movd [edi+8], mm6 ; move double to memory |
| 1319 | sub esi, 6 |
| 1320 | sub edi, 12 |
| 1321 | sub ecx, 2 |
| 1322 | jnz loop_pass4 |
| 1323 | EMMS |
| 1324 | } |
| 1325 | } |
| 1326 | |
| 1327 | sptr -= width_mmx*3; |
| 1328 | dp -= width_mmx*6; |
| 1329 | for (i = width; i; i--) |
| 1330 | { |
| 1331 | png_byte v[8]; |
| 1332 | int j; |
| 1333 | |
| 1334 | png_memcpy(v, sptr, 3); |
| 1335 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1336 | { |
| 1337 | png_memcpy(dp, v, 3); |
| 1338 | dp -= 3; |
| 1339 | } |
| 1340 | sptr -= 3; |
| 1341 | } |
| 1342 | } |
| 1343 | } /* end of pixel_bytes == 3 */ |
| 1344 | |
| 1345 | else if (pixel_bytes == 1) |
| 1346 | { |
| 1347 | if (((pass == 0) || (pass == 1)) && width) |
| 1348 | { |
| 1349 | int width_mmx = ((width >> 2) << 2); |
| 1350 | width -= width_mmx; |
| 1351 | if (width_mmx) |
| 1352 | { |
| 1353 | _asm |
| 1354 | { |
| 1355 | mov esi, sptr |
| 1356 | mov edi, dp |
| 1357 | mov ecx, width_mmx |
| 1358 | sub edi, 31 |
| 1359 | sub esi, 3 |
| 1360 | loop1_pass0: |
| 1361 | movd mm0, [esi] ; X X X X v0 v1 v2 v3 |
| 1362 | movq mm1, mm0 ; X X X X v0 v1 v2 v3 |
| 1363 | punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
| 1364 | movq mm2, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
| 1365 | punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
| 1366 | movq mm3, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
| 1367 | punpckldq mm0, mm0 ; v3 v3 v3 v3 v3 v3 v3 v3 |
| 1368 | punpckhdq mm3, mm3 ; v2 v2 v2 v2 v2 v2 v2 v2 |
| 1369 | movq [edi], mm0 ; move to memory v3 |
| 1370 | punpckhwd mm2, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 |
| 1371 | movq [edi+8], mm3 ; move to memory v2 |
| 1372 | movq mm4, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 |
| 1373 | punpckldq mm2, mm2 ; v1 v1 v1 v1 v1 v1 v1 v1 |
| 1374 | punpckhdq mm4, mm4 ; v0 v0 v0 v0 v0 v0 v0 v0 |
| 1375 | movq [edi+16], mm2 ; move to memory v1 |
| 1376 | movq [edi+24], mm4 ; move to memory v0 |
| 1377 | sub esi, 4 |
| 1378 | sub edi, 32 |
| 1379 | sub ecx, 4 |
| 1380 | jnz loop1_pass0 |
| 1381 | EMMS |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | sptr -= width_mmx; |
| 1386 | dp -= width_mmx*8; |
| 1387 | for (i = width; i; i--) |
| 1388 | { |
| 1389 | int j; |
| 1390 | |
| 1391 | /* I simplified this part in version 1.0.4e |
| 1392 | * here and in several other instances where |
| 1393 | * pixel_bytes == 1 -- GR-P |
| 1394 | * |
| 1395 | * Original code: |
| 1396 | * |
| 1397 | * png_byte v[8]; |
| 1398 | * png_memcpy(v, sptr, pixel_bytes); |
| 1399 | * for (j = 0; j < png_pass_inc[pass]; j++) |
| 1400 | * { |
| 1401 | * png_memcpy(dp, v, pixel_bytes); |
| 1402 | * dp -= pixel_bytes; |
| 1403 | * } |
| 1404 | * sptr -= pixel_bytes; |
| 1405 | * |
| 1406 | * Replacement code is in the next three lines: |
| 1407 | */ |
| 1408 | |
| 1409 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1410 | *dp-- = *sptr; |
| 1411 | sptr--; |
| 1412 | } |
| 1413 | } |
| 1414 | else if (((pass == 2) || (pass == 3)) && width) |
| 1415 | { |
| 1416 | int width_mmx = ((width >> 2) << 2); |
| 1417 | width -= width_mmx; |
| 1418 | if (width_mmx) |
| 1419 | { |
| 1420 | _asm |
| 1421 | { |
| 1422 | mov esi, sptr |
| 1423 | mov edi, dp |
| 1424 | mov ecx, width_mmx |
| 1425 | sub edi, 15 |
| 1426 | sub esi, 3 |
| 1427 | loop1_pass2: |
| 1428 | movd mm0, [esi] ; X X X X v0 v1 v2 v3 |
| 1429 | punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
| 1430 | movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
| 1431 | punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
| 1432 | punpckhwd mm1, mm1 ; v0 v0 v0 v0 v1 v1 v1 v1 |
| 1433 | movq [edi], mm0 ; move to memory v2 and v3 |
| 1434 | sub esi, 4 |
| 1435 | movq [edi+8], mm1 ; move to memory v1 and v0 |
| 1436 | sub edi, 16 |
| 1437 | sub ecx, 4 |
| 1438 | jnz loop1_pass2 |
| 1439 | EMMS |
| 1440 | } |
| 1441 | } |
| 1442 | |
| 1443 | sptr -= width_mmx; |
| 1444 | dp -= width_mmx*4; |
| 1445 | for (i = width; i; i--) |
| 1446 | { |
| 1447 | int j; |
| 1448 | |
| 1449 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1450 | { |
| 1451 | *dp-- = *sptr; |
| 1452 | } |
| 1453 | sptr --; |
| 1454 | } |
| 1455 | } |
| 1456 | else if (width) /* && ((pass == 4) || (pass == 5))) */ |
| 1457 | { |
| 1458 | int width_mmx = ((width >> 3) << 3); |
| 1459 | width -= width_mmx; |
| 1460 | if (width_mmx) |
| 1461 | { |
| 1462 | _asm |
| 1463 | { |
| 1464 | mov esi, sptr |
| 1465 | mov edi, dp |
| 1466 | mov ecx, width_mmx |
| 1467 | sub edi, 15 |
| 1468 | sub esi, 7 |
| 1469 | loop1_pass4: |
| 1470 | movq mm0, [esi] ; v0 v1 v2 v3 v4 v5 v6 v7 |
| 1471 | movq mm1, mm0 ; v0 v1 v2 v3 v4 v5 v6 v7 |
| 1472 | punpcklbw mm0, mm0 ; v4 v4 v5 v5 v6 v6 v7 v7 |
| 1473 | /*movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 */ |
| 1474 | punpckhbw mm1, mm1 ;v0 v0 v1 v1 v2 v2 v3 v3 |
| 1475 | movq [edi+8], mm1 ; move to memory v0 v1 v2 and v3 |
| 1476 | sub esi, 8 |
| 1477 | movq [edi], mm0 ; move to memory v4 v5 v6 and v7 |
| 1478 | /*sub esi, 4 */ |
| 1479 | sub edi, 16 |
| 1480 | sub ecx, 8 |
| 1481 | jnz loop1_pass4 |
| 1482 | EMMS |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | sptr -= width_mmx; |
| 1487 | dp -= width_mmx*2; |
| 1488 | for (i = width; i; i--) |
| 1489 | { |
| 1490 | int j; |
| 1491 | |
| 1492 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1493 | { |
| 1494 | *dp-- = *sptr; |
| 1495 | } |
| 1496 | sptr --; |
| 1497 | } |
| 1498 | } |
| 1499 | } /* end of pixel_bytes == 1 */ |
| 1500 | |
| 1501 | else if (pixel_bytes == 2) |
| 1502 | { |
| 1503 | if (((pass == 0) || (pass == 1)) && width) |
| 1504 | { |
| 1505 | int width_mmx = ((width >> 1) << 1); |
| 1506 | width -= width_mmx; |
| 1507 | if (width_mmx) |
| 1508 | { |
| 1509 | _asm |
| 1510 | { |
| 1511 | mov esi, sptr |
| 1512 | mov edi, dp |
| 1513 | mov ecx, width_mmx |
| 1514 | sub esi, 2 |
| 1515 | sub edi, 30 |
| 1516 | loop2_pass0: |
| 1517 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
| 1518 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
| 1519 | movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
| 1520 | punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 |
| 1521 | punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 |
| 1522 | movq [edi], mm0 |
| 1523 | movq [edi + 8], mm0 |
| 1524 | movq [edi + 16], mm1 |
| 1525 | movq [edi + 24], mm1 |
| 1526 | sub esi, 4 |
| 1527 | sub edi, 32 |
| 1528 | sub ecx, 2 |
| 1529 | jnz loop2_pass0 |
| 1530 | EMMS |
| 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | sptr -= (width_mmx*2 - 2); /* sign fixed */ |
| 1535 | dp -= (width_mmx*16 - 2); /* sign fixed */ |
| 1536 | for (i = width; i; i--) |
| 1537 | { |
| 1538 | png_byte v[8]; |
| 1539 | int j; |
| 1540 | sptr -= 2; |
| 1541 | png_memcpy(v, sptr, 2); |
| 1542 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1543 | { |
| 1544 | dp -= 2; |
| 1545 | png_memcpy(dp, v, 2); |
| 1546 | } |
| 1547 | } |
| 1548 | } |
| 1549 | else if (((pass == 2) || (pass == 3)) && width) |
| 1550 | { |
| 1551 | int width_mmx = ((width >> 1) << 1) ; |
| 1552 | width -= width_mmx; |
| 1553 | if (width_mmx) |
| 1554 | { |
| 1555 | _asm |
| 1556 | { |
| 1557 | mov esi, sptr |
| 1558 | mov edi, dp |
| 1559 | mov ecx, width_mmx |
| 1560 | sub esi, 2 |
| 1561 | sub edi, 14 |
| 1562 | loop2_pass2: |
| 1563 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
| 1564 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
| 1565 | movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
| 1566 | punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 |
| 1567 | punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 |
| 1568 | movq [edi], mm0 |
| 1569 | sub esi, 4 |
| 1570 | movq [edi + 8], mm1 |
| 1571 | /*sub esi, 4 */ |
| 1572 | sub edi, 16 |
| 1573 | sub ecx, 2 |
| 1574 | jnz loop2_pass2 |
| 1575 | EMMS |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | sptr -= (width_mmx*2 - 2); /* sign fixed */ |
| 1580 | dp -= (width_mmx*8 - 2); /* sign fixed */ |
| 1581 | for (i = width; i; i--) |
| 1582 | { |
| 1583 | png_byte v[8]; |
| 1584 | int j; |
| 1585 | sptr -= 2; |
| 1586 | png_memcpy(v, sptr, 2); |
| 1587 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1588 | { |
| 1589 | dp -= 2; |
| 1590 | png_memcpy(dp, v, 2); |
| 1591 | } |
| 1592 | } |
| 1593 | } |
| 1594 | else if (width) /* pass == 4 or 5 */ |
| 1595 | { |
| 1596 | int width_mmx = ((width >> 1) << 1) ; |
| 1597 | width -= width_mmx; |
| 1598 | if (width_mmx) |
| 1599 | { |
| 1600 | _asm |
| 1601 | { |
| 1602 | mov esi, sptr |
| 1603 | mov edi, dp |
| 1604 | mov ecx, width_mmx |
| 1605 | sub esi, 2 |
| 1606 | sub edi, 6 |
| 1607 | loop2_pass4: |
| 1608 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
| 1609 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
| 1610 | sub esi, 4 |
| 1611 | movq [edi], mm0 |
| 1612 | sub edi, 8 |
| 1613 | sub ecx, 2 |
| 1614 | jnz loop2_pass4 |
| 1615 | EMMS |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | sptr -= (width_mmx*2 - 2); /* sign fixed */ |
| 1620 | dp -= (width_mmx*4 - 2); /* sign fixed */ |
| 1621 | for (i = width; i; i--) |
| 1622 | { |
| 1623 | png_byte v[8]; |
| 1624 | int j; |
| 1625 | sptr -= 2; |
| 1626 | png_memcpy(v, sptr, 2); |
| 1627 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1628 | { |
| 1629 | dp -= 2; |
| 1630 | png_memcpy(dp, v, 2); |
| 1631 | } |
| 1632 | } |
| 1633 | } |
| 1634 | } /* end of pixel_bytes == 2 */ |
| 1635 | |
| 1636 | else if (pixel_bytes == 4) |
| 1637 | { |
| 1638 | if (((pass == 0) || (pass == 1)) && width) |
| 1639 | { |
| 1640 | int width_mmx = ((width >> 1) << 1) ; |
| 1641 | width -= width_mmx; |
| 1642 | if (width_mmx) |
| 1643 | { |
| 1644 | _asm |
| 1645 | { |
| 1646 | mov esi, sptr |
| 1647 | mov edi, dp |
| 1648 | mov ecx, width_mmx |
| 1649 | sub esi, 4 |
| 1650 | sub edi, 60 |
| 1651 | loop4_pass0: |
| 1652 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1653 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1654 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
| 1655 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
| 1656 | movq [edi], mm0 |
| 1657 | movq [edi + 8], mm0 |
| 1658 | movq [edi + 16], mm0 |
| 1659 | movq [edi + 24], mm0 |
| 1660 | movq [edi+32], mm1 |
| 1661 | movq [edi + 40], mm1 |
| 1662 | movq [edi+ 48], mm1 |
| 1663 | sub esi, 8 |
| 1664 | movq [edi + 56], mm1 |
| 1665 | sub edi, 64 |
| 1666 | sub ecx, 2 |
| 1667 | jnz loop4_pass0 |
| 1668 | EMMS |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | sptr -= (width_mmx*4 - 4); /* sign fixed */ |
| 1673 | dp -= (width_mmx*32 - 4); /* sign fixed */ |
| 1674 | for (i = width; i; i--) |
| 1675 | { |
| 1676 | png_byte v[8]; |
| 1677 | int j; |
| 1678 | sptr -= 4; |
| 1679 | png_memcpy(v, sptr, 4); |
| 1680 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1681 | { |
| 1682 | dp -= 4; |
| 1683 | png_memcpy(dp, v, 4); |
| 1684 | } |
| 1685 | } |
| 1686 | } |
| 1687 | else if (((pass == 2) || (pass == 3)) && width) |
| 1688 | { |
| 1689 | int width_mmx = ((width >> 1) << 1) ; |
| 1690 | width -= width_mmx; |
| 1691 | if (width_mmx) |
| 1692 | { |
| 1693 | _asm |
| 1694 | { |
| 1695 | mov esi, sptr |
| 1696 | mov edi, dp |
| 1697 | mov ecx, width_mmx |
| 1698 | sub esi, 4 |
| 1699 | sub edi, 28 |
| 1700 | loop4_pass2: |
| 1701 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1702 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1703 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
| 1704 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
| 1705 | movq [edi], mm0 |
| 1706 | movq [edi + 8], mm0 |
| 1707 | movq [edi+16], mm1 |
| 1708 | movq [edi + 24], mm1 |
| 1709 | sub esi, 8 |
| 1710 | sub edi, 32 |
| 1711 | sub ecx, 2 |
| 1712 | jnz loop4_pass2 |
| 1713 | EMMS |
| 1714 | } |
| 1715 | } |
| 1716 | |
| 1717 | sptr -= (width_mmx*4 - 4); /* sign fixed */ |
| 1718 | dp -= (width_mmx*16 - 4); /* sign fixed */ |
| 1719 | for (i = width; i; i--) |
| 1720 | { |
| 1721 | png_byte v[8]; |
| 1722 | int j; |
| 1723 | sptr -= 4; |
| 1724 | png_memcpy(v, sptr, 4); |
| 1725 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1726 | { |
| 1727 | dp -= 4; |
| 1728 | png_memcpy(dp, v, 4); |
| 1729 | } |
| 1730 | } |
| 1731 | } |
| 1732 | else if (width) /* pass == 4 or 5 */ |
| 1733 | { |
| 1734 | int width_mmx = ((width >> 1) << 1) ; |
| 1735 | width -= width_mmx; |
| 1736 | if (width_mmx) |
| 1737 | { |
| 1738 | _asm |
| 1739 | { |
| 1740 | mov esi, sptr |
| 1741 | mov edi, dp |
| 1742 | mov ecx, width_mmx |
| 1743 | sub esi, 4 |
| 1744 | sub edi, 12 |
| 1745 | loop4_pass4: |
| 1746 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1747 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
| 1748 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
| 1749 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
| 1750 | movq [edi], mm0 |
| 1751 | sub esi, 8 |
| 1752 | movq [edi + 8], mm1 |
| 1753 | sub edi, 16 |
| 1754 | sub ecx, 2 |
| 1755 | jnz loop4_pass4 |
| 1756 | EMMS |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | sptr -= (width_mmx*4 - 4); /* sign fixed */ |
| 1761 | dp -= (width_mmx*8 - 4); /* sign fixed */ |
| 1762 | for (i = width; i; i--) |
| 1763 | { |
| 1764 | png_byte v[8]; |
| 1765 | int j; |
| 1766 | sptr -= 4; |
| 1767 | png_memcpy(v, sptr, 4); |
| 1768 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1769 | { |
| 1770 | dp -= 4; |
| 1771 | png_memcpy(dp, v, 4); |
| 1772 | } |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | } /* end of pixel_bytes == 4 */ |
| 1777 | |
| 1778 | else if (pixel_bytes == 6) |
| 1779 | { |
| 1780 | for (i = width; i; i--) |
| 1781 | { |
| 1782 | png_byte v[8]; |
| 1783 | int j; |
| 1784 | png_memcpy(v, sptr, 6); |
| 1785 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1786 | { |
| 1787 | png_memcpy(dp, v, 6); |
| 1788 | dp -= 6; |
| 1789 | } |
| 1790 | sptr -= 6; |
| 1791 | } |
| 1792 | } /* end of pixel_bytes == 6 */ |
| 1793 | |
| 1794 | else |
| 1795 | { |
| 1796 | for (i = width; i; i--) |
| 1797 | { |
| 1798 | png_byte v[8]; |
| 1799 | int j; |
| 1800 | png_memcpy(v, sptr, pixel_bytes); |
| 1801 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1802 | { |
| 1803 | png_memcpy(dp, v, pixel_bytes); |
| 1804 | dp -= pixel_bytes; |
| 1805 | } |
| 1806 | sptr-= pixel_bytes; |
| 1807 | } |
| 1808 | } |
| 1809 | } /* end of mmx_supported */ |
| 1810 | |
| 1811 | else /* MMX not supported: use modified C code - takes advantage |
| 1812 | * of inlining of memcpy for a constant */ |
| 1813 | { |
| 1814 | if (pixel_bytes == 1) |
| 1815 | { |
| 1816 | for (i = width; i; i--) |
| 1817 | { |
| 1818 | int j; |
| 1819 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1820 | *dp-- = *sptr; |
| 1821 | sptr--; |
| 1822 | } |
| 1823 | } |
| 1824 | else if (pixel_bytes == 3) |
| 1825 | { |
| 1826 | for (i = width; i; i--) |
| 1827 | { |
| 1828 | png_byte v[8]; |
| 1829 | int j; |
| 1830 | png_memcpy(v, sptr, pixel_bytes); |
| 1831 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1832 | { |
| 1833 | png_memcpy(dp, v, pixel_bytes); |
| 1834 | dp -= pixel_bytes; |
| 1835 | } |
| 1836 | sptr -= pixel_bytes; |
| 1837 | } |
| 1838 | } |
| 1839 | else if (pixel_bytes == 2) |
| 1840 | { |
| 1841 | for (i = width; i; i--) |
| 1842 | { |
| 1843 | png_byte v[8]; |
| 1844 | int j; |
| 1845 | png_memcpy(v, sptr, pixel_bytes); |
| 1846 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1847 | { |
| 1848 | png_memcpy(dp, v, pixel_bytes); |
| 1849 | dp -= pixel_bytes; |
| 1850 | } |
| 1851 | sptr -= pixel_bytes; |
| 1852 | } |
| 1853 | } |
| 1854 | else if (pixel_bytes == 4) |
| 1855 | { |
| 1856 | for (i = width; i; i--) |
| 1857 | { |
| 1858 | png_byte v[8]; |
| 1859 | int j; |
| 1860 | png_memcpy(v, sptr, pixel_bytes); |
| 1861 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1862 | { |
| 1863 | png_memcpy(dp, v, pixel_bytes); |
| 1864 | dp -= pixel_bytes; |
| 1865 | } |
| 1866 | sptr -= pixel_bytes; |
| 1867 | } |
| 1868 | } |
| 1869 | else if (pixel_bytes == 6) |
| 1870 | { |
| 1871 | for (i = width; i; i--) |
| 1872 | { |
| 1873 | png_byte v[8]; |
| 1874 | int j; |
| 1875 | png_memcpy(v, sptr, pixel_bytes); |
| 1876 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1877 | { |
| 1878 | png_memcpy(dp, v, pixel_bytes); |
| 1879 | dp -= pixel_bytes; |
| 1880 | } |
| 1881 | sptr -= pixel_bytes; |
| 1882 | } |
| 1883 | } |
| 1884 | else |
| 1885 | { |
| 1886 | for (i = width; i; i--) |
| 1887 | { |
| 1888 | png_byte v[8]; |
| 1889 | int j; |
| 1890 | png_memcpy(v, sptr, pixel_bytes); |
| 1891 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1892 | { |
| 1893 | png_memcpy(dp, v, pixel_bytes); |
| 1894 | dp -= pixel_bytes; |
| 1895 | } |
| 1896 | sptr -= pixel_bytes; |
| 1897 | } |
| 1898 | } |
| 1899 | |
| 1900 | } /* end of MMX not supported */ |
| 1901 | break; |
| 1902 | } |
| 1903 | } /* end switch (row_info->pixel_depth) */ |
| 1904 | |
| 1905 | row_info->width = final_width; |
| 1906 | |
| 1907 | row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,final_width); |
| 1908 | } |
| 1909 | |
| 1910 | } |
| 1911 | |
| 1912 | #endif /* PNG_READ_INTERLACING_SUPPORTED */ |
| 1913 | |
| 1914 | |
| 1915 | /* These variables are utilized in the functions below. They are declared */ |
| 1916 | /* globally here to ensure alignment on 8-byte boundaries. */ |
| 1917 | |
| 1918 | union uAll { |
| 1919 | __int64 use; |
| 1920 | double align; |
| 1921 | } LBCarryMask = {0x0101010101010101}, |
| 1922 | HBClearMask = {0x7f7f7f7f7f7f7f7f}, |
| 1923 | ActiveMask, ActiveMask2, ActiveMaskEnd, ShiftBpp, ShiftRem; |
| 1924 | |
| 1925 | |
| 1926 | /* Optimized code for PNG Average filter decoder */ |
| 1927 | void /* PRIVATE */ |
| 1928 | png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row |
| 1929 | , png_bytep prev_row) |
| 1930 | { |
| 1931 | int bpp; |
| 1932 | png_uint_32 FullLength; |
| 1933 | png_uint_32 MMXLength; |
| 1934 | /*png_uint_32 len; */ |
| 1935 | int diff; |
| 1936 | |
| 1937 | bpp = (row_info->pixel_depth + 7) >> 3; /* Get # bytes per pixel */ |
| 1938 | FullLength = row_info->rowbytes; /* # of bytes to filter */ |
| 1939 | _asm { |
| 1940 | /* Init address pointers and offset */ |
| 1941 | mov edi, row /* edi ==> Avg(x) */ |
| 1942 | xor ebx, ebx /* ebx ==> x */ |
| 1943 | mov edx, edi |
| 1944 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 1945 | sub edx, bpp /* edx ==> Raw(x-bpp) */ |
| 1946 | |
| 1947 | xor eax, eax |
| 1948 | /* Compute the Raw value for the first bpp bytes */ |
| 1949 | /* Raw(x) = Avg(x) + (Prior(x)/2) */ |
| 1950 | davgrlp: |
| 1951 | mov al, [esi + ebx] /* Load al with Prior(x) */ |
| 1952 | inc ebx |
| 1953 | shr al, 1 /* divide by 2 */ |
| 1954 | add al, [edi+ebx-1] /* Add Avg(x); -1 to offset inc ebx */ |
| 1955 | cmp ebx, bpp |
| 1956 | mov [edi+ebx-1], al /* Write back Raw(x); */ |
| 1957 | /* mov does not affect flags; -1 to offset inc ebx */ |
| 1958 | jb davgrlp |
| 1959 | /* get # of bytes to alignment */ |
| 1960 | mov diff, edi /* take start of row */ |
| 1961 | add diff, ebx /* add bpp */ |
| 1962 | add diff, 0xf /* add 7 + 8 to incr past alignment boundary */ |
| 1963 | and diff, 0xfffffff8 /* mask to alignment boundary */ |
| 1964 | sub diff, edi /* subtract from start ==> value ebx at alignment */ |
| 1965 | jz davggo |
| 1966 | /* fix alignment */ |
| 1967 | /* Compute the Raw value for the bytes upto the alignment boundary */ |
| 1968 | /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */ |
| 1969 | xor ecx, ecx |
| 1970 | davglp1: |
| 1971 | xor eax, eax |
| 1972 | mov cl, [esi + ebx] /* load cl with Prior(x) */ |
| 1973 | mov al, [edx + ebx] /* load al with Raw(x-bpp) */ |
| 1974 | add ax, cx |
| 1975 | inc ebx |
| 1976 | shr ax, 1 /* divide by 2 */ |
| 1977 | add al, [edi+ebx-1] /* Add Avg(x); -1 to offset inc ebx */ |
| 1978 | cmp ebx, diff /* Check if at alignment boundary */ |
| 1979 | mov [edi+ebx-1], al /* Write back Raw(x); */ |
| 1980 | /* mov does not affect flags; -1 to offset inc ebx */ |
| 1981 | jb davglp1 /* Repeat until at alignment boundary */ |
| 1982 | davggo: |
| 1983 | mov eax, FullLength |
| 1984 | mov ecx, eax |
| 1985 | sub eax, ebx /* subtract alignment fix */ |
| 1986 | and eax, 0x00000007 /* calc bytes over mult of 8 */ |
| 1987 | sub ecx, eax /* drop over bytes from original length */ |
| 1988 | mov MMXLength, ecx |
| 1989 | } /* end _asm block */ |
| 1990 | /* Now do the math for the rest of the row */ |
| 1991 | switch ( bpp ) |
| 1992 | { |
| 1993 | case 3: |
| 1994 | { |
| 1995 | ActiveMask.use = 0x0000000000ffffff; |
| 1996 | ShiftBpp.use = 24; /* == 3 * 8 */ |
| 1997 | ShiftRem.use = 40; /* == 64 - 24 */ |
| 1998 | _asm { |
| 1999 | /* Re-init address pointers and offset */ |
| 2000 | movq mm7, ActiveMask |
| 2001 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2002 | movq mm5, LBCarryMask |
| 2003 | mov edi, row /* edi ==> Avg(x) */ |
| 2004 | movq mm4, HBClearMask |
| 2005 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2006 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2007 | movq mm2, [edi + ebx - 8] /* Load previous aligned 8 bytes */ |
| 2008 | /* (we correct position in loop below) */ |
| 2009 | davg3lp: |
| 2010 | movq mm0, [edi + ebx] /* Load mm0 with Avg(x) */ |
| 2011 | /* Add (Prev_row/2) to Average */ |
| 2012 | movq mm3, mm5 |
| 2013 | psrlq mm2, ShiftRem /* Correct position Raw(x-bpp) data */ |
| 2014 | movq mm1, [esi + ebx] /* Load mm1 with Prior(x) */ |
| 2015 | movq mm6, mm7 |
| 2016 | pand mm3, mm1 /* get lsb for each prev_row byte */ |
| 2017 | psrlq mm1, 1 /* divide prev_row bytes by 2 */ |
| 2018 | pand mm1, mm4 /* clear invalid bit 7 of each byte */ |
| 2019 | paddb mm0, mm1 /* add (Prev_row/2) to Avg for each byte */ |
| 2020 | /* Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2021 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2022 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2023 | /* lsb's were == 1 (Only valid for active group) */ |
| 2024 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2025 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2026 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2027 | pand mm2, mm6 /* Leave only Active Group 1 bytes to add to Avg */ |
| 2028 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active */ |
| 2029 | /* byte */ |
| 2030 | /* Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2031 | psllq mm6, ShiftBpp /* shift the mm6 mask to cover bytes 3-5 */ |
| 2032 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2033 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2034 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2035 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2036 | /* lsb's were == 1 (Only valid for active group) */ |
| 2037 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2038 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2039 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2040 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2041 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active */ |
| 2042 | /* byte */ |
| 2043 | |
| 2044 | /* Add 3rd active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2045 | psllq mm6, ShiftBpp /* shift the mm6 mask to cover the last two */ |
| 2046 | /* bytes */ |
| 2047 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2048 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2049 | /* Data only needs to be shifted once here to */ |
| 2050 | /* get the correct x-bpp offset. */ |
| 2051 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2052 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2053 | /* lsb's were == 1 (Only valid for active group) */ |
| 2054 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2055 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2056 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2057 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2058 | add ebx, 8 |
| 2059 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active */ |
| 2060 | /* byte */ |
| 2061 | |
| 2062 | /* Now ready to write back to memory */ |
| 2063 | movq [edi + ebx - 8], mm0 |
| 2064 | /* Move updated Raw(x) to use as Raw(x-bpp) for next loop */ |
| 2065 | cmp ebx, MMXLength |
| 2066 | movq mm2, mm0 /* mov updated Raw(x) to mm2 */ |
| 2067 | jb davg3lp |
| 2068 | } /* end _asm block */ |
| 2069 | } |
| 2070 | break; |
| 2071 | |
| 2072 | case 6: |
| 2073 | case 4: |
| 2074 | case 7: |
| 2075 | case 5: |
| 2076 | { |
| 2077 | ActiveMask.use = 0xffffffffffffffff; /* use shift below to clear */ |
| 2078 | /* appropriate inactive bytes */ |
| 2079 | ShiftBpp.use = bpp << 3; |
| 2080 | ShiftRem.use = 64 - ShiftBpp.use; |
| 2081 | _asm { |
| 2082 | movq mm4, HBClearMask |
| 2083 | /* Re-init address pointers and offset */ |
| 2084 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2085 | /* Load ActiveMask and clear all bytes except for 1st active group */ |
| 2086 | movq mm7, ActiveMask |
| 2087 | mov edi, row /* edi ==> Avg(x) */ |
| 2088 | psrlq mm7, ShiftRem |
| 2089 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2090 | movq mm6, mm7 |
| 2091 | movq mm5, LBCarryMask |
| 2092 | psllq mm6, ShiftBpp /* Create mask for 2nd active group */ |
| 2093 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2094 | movq mm2, [edi + ebx - 8] /* Load previous aligned 8 bytes */ |
| 2095 | /* (we correct position in loop below) */ |
| 2096 | davg4lp: |
| 2097 | movq mm0, [edi + ebx] |
| 2098 | psrlq mm2, ShiftRem /* shift data to position correctly */ |
| 2099 | movq mm1, [esi + ebx] |
| 2100 | /* Add (Prev_row/2) to Average */ |
| 2101 | movq mm3, mm5 |
| 2102 | pand mm3, mm1 /* get lsb for each prev_row byte */ |
| 2103 | psrlq mm1, 1 /* divide prev_row bytes by 2 */ |
| 2104 | pand mm1, mm4 /* clear invalid bit 7 of each byte */ |
| 2105 | paddb mm0, mm1 /* add (Prev_row/2) to Avg for each byte */ |
| 2106 | /* Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2107 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2108 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2109 | /* lsb's were == 1 (Only valid for active group) */ |
| 2110 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2111 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2112 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2113 | pand mm2, mm7 /* Leave only Active Group 1 bytes to add to Avg */ |
| 2114 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active */ |
| 2115 | /* byte */ |
| 2116 | /* Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2117 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2118 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2119 | add ebx, 8 |
| 2120 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2121 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2122 | /* lsb's were == 1 (Only valid for active group) */ |
| 2123 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2124 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2125 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2126 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2127 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active */ |
| 2128 | /* byte */ |
| 2129 | cmp ebx, MMXLength |
| 2130 | /* Now ready to write back to memory */ |
| 2131 | movq [edi + ebx - 8], mm0 |
| 2132 | /* Prep Raw(x-bpp) for next loop */ |
| 2133 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2134 | jb davg4lp |
| 2135 | } /* end _asm block */ |
| 2136 | } |
| 2137 | break; |
| 2138 | case 2: |
| 2139 | { |
| 2140 | ActiveMask.use = 0x000000000000ffff; |
| 2141 | ShiftBpp.use = 16; /* == 2 * 8 [BUGFIX] */ |
| 2142 | ShiftRem.use = 48; /* == 64 - 16 [BUGFIX] */ |
| 2143 | _asm { |
| 2144 | /* Load ActiveMask */ |
| 2145 | movq mm7, ActiveMask |
| 2146 | /* Re-init address pointers and offset */ |
| 2147 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2148 | movq mm5, LBCarryMask |
| 2149 | mov edi, row /* edi ==> Avg(x) */ |
| 2150 | movq mm4, HBClearMask |
| 2151 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2152 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2153 | movq mm2, [edi + ebx - 8] /* Load previous aligned 8 bytes */ |
| 2154 | /* (we correct position in loop below) */ |
| 2155 | davg2lp: |
| 2156 | movq mm0, [edi + ebx] |
| 2157 | psrlq mm2, ShiftRem /* shift data to position correctly [BUGFIX] */ |
| 2158 | movq mm1, [esi + ebx] |
| 2159 | /* Add (Prev_row/2) to Average */ |
| 2160 | movq mm3, mm5 |
| 2161 | pand mm3, mm1 /* get lsb for each prev_row byte */ |
| 2162 | psrlq mm1, 1 /* divide prev_row bytes by 2 */ |
| 2163 | pand mm1, mm4 /* clear invalid bit 7 of each byte */ |
| 2164 | movq mm6, mm7 |
| 2165 | paddb mm0, mm1 /* add (Prev_row/2) to Avg for each byte */ |
| 2166 | /* Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2167 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2168 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2169 | /* lsb's were == 1 (Only valid for active group) */ |
| 2170 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2171 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2172 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2173 | pand mm2, mm6 /* Leave only Active Group 1 bytes to add to Avg */ |
| 2174 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active byte */ |
| 2175 | /* Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2176 | psllq mm6, ShiftBpp /* shift the mm6 mask to cover bytes 2 & 3 */ |
| 2177 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2178 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2179 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2180 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2181 | /* lsb's were == 1 (Only valid for active group) */ |
| 2182 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2183 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2184 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2185 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2186 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active byte */ |
| 2187 | |
| 2188 | /* Add rdd active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2189 | psllq mm6, ShiftBpp /* shift the mm6 mask to cover bytes 4 & 5 */ |
| 2190 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2191 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2192 | /* Data only needs to be shifted once here to */ |
| 2193 | /* get the correct x-bpp offset. */ |
| 2194 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2195 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2196 | /* lsb's were == 1 (Only valid for active group) */ |
| 2197 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2198 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2199 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2200 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2201 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active byte */ |
| 2202 | |
| 2203 | /* Add 4th active group (Raw(x-bpp)/2) to Average with LBCarry */ |
| 2204 | psllq mm6, ShiftBpp /* shift the mm6 mask to cover bytes 6 & 7 */ |
| 2205 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2206 | psllq mm2, ShiftBpp /* shift data to position correctly */ |
| 2207 | /* Data only needs to be shifted once here to */ |
| 2208 | /* get the correct x-bpp offset. */ |
| 2209 | add ebx, 8 |
| 2210 | movq mm1, mm3 /* now use mm1 for getting LBCarrys */ |
| 2211 | pand mm1, mm2 /* get LBCarrys for each byte where both */ |
| 2212 | /* lsb's were == 1 (Only valid for active group) */ |
| 2213 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2214 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2215 | paddb mm2, mm1 /* add LBCarrys to (Raw(x-bpp)/2) for each byte */ |
| 2216 | pand mm2, mm6 /* Leave only Active Group 2 bytes to add to Avg */ |
| 2217 | paddb mm0, mm2 /* add (Raw/2) + LBCarrys to Avg for each Active byte */ |
| 2218 | |
| 2219 | cmp ebx, MMXLength |
| 2220 | /* Now ready to write back to memory */ |
| 2221 | movq [edi + ebx - 8], mm0 |
| 2222 | /* Prep Raw(x-bpp) for next loop */ |
| 2223 | movq mm2, mm0 /* mov updated Raws to mm2 */ |
| 2224 | jb davg2lp |
| 2225 | } /* end _asm block */ |
| 2226 | } |
| 2227 | break; |
| 2228 | |
| 2229 | case 1: /* bpp == 1 */ |
| 2230 | { |
| 2231 | _asm { |
| 2232 | /* Re-init address pointers and offset */ |
| 2233 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2234 | mov edi, row /* edi ==> Avg(x) */ |
| 2235 | cmp ebx, FullLength /* Test if offset at end of array */ |
| 2236 | jnb davg1end |
| 2237 | /* Do Paeth decode for remaining bytes */ |
| 2238 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2239 | mov edx, edi |
| 2240 | xor ecx, ecx /* zero ecx before using cl & cx in loop below */ |
| 2241 | sub edx, bpp /* edx ==> Raw(x-bpp) */ |
| 2242 | davg1lp: |
| 2243 | /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */ |
| 2244 | xor eax, eax |
| 2245 | mov cl, [esi + ebx] /* load cl with Prior(x) */ |
| 2246 | mov al, [edx + ebx] /* load al with Raw(x-bpp) */ |
| 2247 | add ax, cx |
| 2248 | inc ebx |
| 2249 | shr ax, 1 /* divide by 2 */ |
| 2250 | add al, [edi+ebx-1] /* Add Avg(x); -1 to offset inc ebx */ |
| 2251 | cmp ebx, FullLength /* Check if at end of array */ |
| 2252 | mov [edi+ebx-1], al /* Write back Raw(x); */ |
| 2253 | /* mov does not affect flags; -1 to offset inc ebx */ |
| 2254 | jb davg1lp |
| 2255 | davg1end: |
| 2256 | } /* end _asm block */ |
| 2257 | } |
| 2258 | return; |
| 2259 | |
| 2260 | case 8: /* bpp == 8 */ |
| 2261 | { |
| 2262 | _asm { |
| 2263 | /* Re-init address pointers and offset */ |
| 2264 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2265 | movq mm5, LBCarryMask |
| 2266 | mov edi, row /* edi ==> Avg(x) */ |
| 2267 | movq mm4, HBClearMask |
| 2268 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2269 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2270 | movq mm2, [edi + ebx - 8] /* Load previous aligned 8 bytes */ |
| 2271 | /* (NO NEED to correct position in loop below) */ |
| 2272 | davg8lp: |
| 2273 | movq mm0, [edi + ebx] |
| 2274 | movq mm3, mm5 |
| 2275 | movq mm1, [esi + ebx] |
| 2276 | add ebx, 8 |
| 2277 | pand mm3, mm1 /* get lsb for each prev_row byte */ |
| 2278 | psrlq mm1, 1 /* divide prev_row bytes by 2 */ |
| 2279 | pand mm3, mm2 /* get LBCarrys for each byte where both */ |
| 2280 | /* lsb's were == 1 */ |
| 2281 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2282 | pand mm1, mm4 /* clear invalid bit 7 of each byte */ |
| 2283 | paddb mm0, mm3 /* add LBCarrys to Avg for each byte */ |
| 2284 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2285 | paddb mm0, mm1 /* add (Prev_row/2) to Avg for each byte */ |
| 2286 | paddb mm0, mm2 /* add (Raw/2) to Avg for each byte */ |
| 2287 | cmp ebx, MMXLength |
| 2288 | movq [edi + ebx - 8], mm0 |
| 2289 | movq mm2, mm0 /* reuse as Raw(x-bpp) */ |
| 2290 | jb davg8lp |
| 2291 | } /* end _asm block */ |
| 2292 | } |
| 2293 | break; |
| 2294 | default: /* bpp greater than 8 */ |
| 2295 | { |
| 2296 | _asm { |
| 2297 | movq mm5, LBCarryMask |
| 2298 | /* Re-init address pointers and offset */ |
| 2299 | mov ebx, diff /* ebx ==> x = offset to alignment boundary */ |
| 2300 | mov edi, row /* edi ==> Avg(x) */ |
| 2301 | movq mm4, HBClearMask |
| 2302 | mov edx, edi |
| 2303 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2304 | sub edx, bpp /* edx ==> Raw(x-bpp) */ |
| 2305 | davgAlp: |
| 2306 | movq mm0, [edi + ebx] |
| 2307 | movq mm3, mm5 |
| 2308 | movq mm1, [esi + ebx] |
| 2309 | pand mm3, mm1 /* get lsb for each prev_row byte */ |
| 2310 | movq mm2, [edx + ebx] |
| 2311 | psrlq mm1, 1 /* divide prev_row bytes by 2 */ |
| 2312 | pand mm3, mm2 /* get LBCarrys for each byte where both */ |
| 2313 | /* lsb's were == 1 */ |
| 2314 | psrlq mm2, 1 /* divide raw bytes by 2 */ |
| 2315 | pand mm1, mm4 /* clear invalid bit 7 of each byte */ |
| 2316 | paddb mm0, mm3 /* add LBCarrys to Avg for each byte */ |
| 2317 | pand mm2, mm4 /* clear invalid bit 7 of each byte */ |
| 2318 | paddb mm0, mm1 /* add (Prev_row/2) to Avg for each byte */ |
| 2319 | add ebx, 8 |
| 2320 | paddb mm0, mm2 /* add (Raw/2) to Avg for each byte */ |
| 2321 | cmp ebx, MMXLength |
| 2322 | movq [edi + ebx - 8], mm0 |
| 2323 | jb davgAlp |
| 2324 | } /* end _asm block */ |
| 2325 | } |
| 2326 | break; |
| 2327 | } /* end switch ( bpp ) */ |
| 2328 | |
| 2329 | _asm { |
| 2330 | /* MMX acceleration complete now do clean-up */ |
| 2331 | /* Check if any remaining bytes left to decode */ |
| 2332 | mov ebx, MMXLength /* ebx ==> x = offset bytes remaining after MMX */ |
| 2333 | mov edi, row /* edi ==> Avg(x) */ |
| 2334 | cmp ebx, FullLength /* Test if offset at end of array */ |
| 2335 | jnb davgend |
| 2336 | /* Do Paeth decode for remaining bytes */ |
| 2337 | mov esi, prev_row /* esi ==> Prior(x) */ |
| 2338 | mov edx, edi |
| 2339 | xor ecx, ecx /* zero ecx before using cl & cx in loop below */ |
| 2340 | sub edx, bpp /* edx ==> Raw(x-bpp) */ |
| 2341 | davglp2: |
| 2342 | /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */ |
| 2343 | xor eax, eax |
| 2344 | mov cl, [esi + ebx] /* load cl with Prior(x) */ |
| 2345 | mov al, [edx + ebx] /* load al with Raw(x-bpp) */ |
| 2346 | add ax, cx |
| 2347 | inc ebx |
| 2348 | shr ax, 1 /* divide by 2 */ |
| 2349 | add al, [edi+ebx-1] /* Add Avg(x); -1 to offset inc ebx */ |
| 2350 | cmp ebx, FullLength /* Check if at end of array */ |
| 2351 | mov [edi+ebx-1], al /* Write back Raw(x); */ |
| 2352 | /* mov does not affect flags; -1 to offset inc ebx */ |
| 2353 | jb davglp2 |
| 2354 | davgend: |
| 2355 | emms /* End MMX instructions; prep for possible FP instrs. */ |
| 2356 | } /* end _asm block */ |
| 2357 | } |
| 2358 | |
| 2359 | /* Optimized code for PNG Paeth filter decoder */ |
| 2360 | void /* PRIVATE */ |
| 2361 | png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row, |
| 2362 | png_bytep prev_row) |
| 2363 | { |
| 2364 | png_uint_32 FullLength; |
| 2365 | png_uint_32 MMXLength; |
| 2366 | /*png_uint_32 len; */ |
| 2367 | int bpp; |
| 2368 | int diff; |
| 2369 | /*int ptemp; */ |
| 2370 | int patemp, pbtemp, pctemp; |
| 2371 | |
| 2372 | bpp = (row_info->pixel_depth + 7) >> 3; /* Get # bytes per pixel */ |
| 2373 | FullLength = row_info->rowbytes; /* # of bytes to filter */ |
| 2374 | _asm |
| 2375 | { |
| 2376 | xor ebx, ebx /* ebx ==> x offset */ |
| 2377 | mov edi, row |
| 2378 | xor edx, edx /* edx ==> x-bpp offset */ |
| 2379 | mov esi, prev_row |
| 2380 | xor eax, eax |
| 2381 | |
| 2382 | /* Compute the Raw value for the first bpp bytes */ |
| 2383 | /* Note: the formula works out to be always */ |
| 2384 | /* Paeth(x) = Raw(x) + Prior(x) where x < bpp */ |
| 2385 | dpthrlp: |
| 2386 | mov al, [edi + ebx] |
| 2387 | add al, [esi + ebx] |
| 2388 | inc ebx |
| 2389 | cmp ebx, bpp |
| 2390 | mov [edi + ebx - 1], al |
| 2391 | jb dpthrlp |
| 2392 | /* get # of bytes to alignment */ |
| 2393 | mov diff, edi /* take start of row */ |
| 2394 | add diff, ebx /* add bpp */ |
| 2395 | xor ecx, ecx |
| 2396 | add diff, 0xf /* add 7 + 8 to incr past alignment boundary */ |
| 2397 | and diff, 0xfffffff8 /* mask to alignment boundary */ |
| 2398 | sub diff, edi /* subtract from start ==> value ebx at alignment */ |
| 2399 | jz dpthgo |
| 2400 | /* fix alignment */ |
| 2401 | dpthlp1: |
| 2402 | xor eax, eax |
| 2403 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2404 | mov al, [esi + ebx] /* load Prior(x) into al */ |
| 2405 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 2406 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 2407 | mov patemp, eax /* Save pav for later use */ |
| 2408 | xor eax, eax |
| 2409 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2410 | mov al, [edi + edx] /* load Raw(x-bpp) into al */ |
| 2411 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 2412 | mov ecx, eax |
| 2413 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2414 | add eax, patemp /* pcv = pav + pbv */ |
| 2415 | /* pc = abs(pcv) */ |
| 2416 | test eax, 0x80000000 |
| 2417 | jz dpthpca |
| 2418 | neg eax /* reverse sign of neg values */ |
| 2419 | dpthpca: |
| 2420 | mov pctemp, eax /* save pc for later use */ |
| 2421 | /* pb = abs(pbv) */ |
| 2422 | test ecx, 0x80000000 |
| 2423 | jz dpthpba |
| 2424 | neg ecx /* reverse sign of neg values */ |
| 2425 | dpthpba: |
| 2426 | mov pbtemp, ecx /* save pb for later use */ |
| 2427 | /* pa = abs(pav) */ |
| 2428 | mov eax, patemp |
| 2429 | test eax, 0x80000000 |
| 2430 | jz dpthpaa |
| 2431 | neg eax /* reverse sign of neg values */ |
| 2432 | dpthpaa: |
| 2433 | mov patemp, eax /* save pa for later use */ |
| 2434 | /* test if pa <= pb */ |
| 2435 | cmp eax, ecx |
| 2436 | jna dpthabb |
| 2437 | /* pa > pb; now test if pb <= pc */ |
| 2438 | cmp ecx, pctemp |
| 2439 | jna dpthbbc |
| 2440 | /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 2441 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 2442 | jmp dpthpaeth |
| 2443 | dpthbbc: |
| 2444 | /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */ |
| 2445 | mov cl, [esi + ebx] /* load Prior(x) into cl */ |
| 2446 | jmp dpthpaeth |
| 2447 | dpthabb: |
| 2448 | /* pa <= pb; now test if pa <= pc */ |
| 2449 | cmp eax, pctemp |
| 2450 | jna dpthabc |
| 2451 | /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 2452 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 2453 | jmp dpthpaeth |
| 2454 | dpthabc: |
| 2455 | /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */ |
| 2456 | mov cl, [edi + edx] /* load Raw(x-bpp) into cl */ |
| 2457 | dpthpaeth: |
| 2458 | inc ebx |
| 2459 | inc edx |
| 2460 | /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */ |
| 2461 | add [edi + ebx - 1], cl |
| 2462 | cmp ebx, diff |
| 2463 | jb dpthlp1 |
| 2464 | dpthgo: |
| 2465 | mov ecx, FullLength |
| 2466 | mov eax, ecx |
| 2467 | sub eax, ebx /* subtract alignment fix */ |
| 2468 | and eax, 0x00000007 /* calc bytes over mult of 8 */ |
| 2469 | sub ecx, eax /* drop over bytes from original length */ |
| 2470 | mov MMXLength, ecx |
| 2471 | } /* end _asm block */ |
| 2472 | /* Now do the math for the rest of the row */ |
| 2473 | switch ( bpp ) |
| 2474 | { |
| 2475 | case 3: |
| 2476 | { |
| 2477 | ActiveMask.use = 0x0000000000ffffff; |
| 2478 | ActiveMaskEnd.use = 0xffff000000000000; |
| 2479 | ShiftBpp.use = 24; /* == bpp(3) * 8 */ |
| 2480 | ShiftRem.use = 40; /* == 64 - 24 */ |
| 2481 | _asm |
| 2482 | { |
| 2483 | mov ebx, diff |
| 2484 | mov edi, row |
| 2485 | mov esi, prev_row |
| 2486 | pxor mm0, mm0 |
| 2487 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2488 | movq mm1, [edi+ebx-8] |
| 2489 | dpth3lp: |
| 2490 | psrlq mm1, ShiftRem /* shift last 3 bytes to 1st 3 bytes */ |
| 2491 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 2492 | punpcklbw mm1, mm0 /* Unpack High bytes of a */ |
| 2493 | movq mm3, [esi+ebx-8] /* Prep c=Prior(x-bpp) bytes */ |
| 2494 | punpcklbw mm2, mm0 /* Unpack High bytes of b */ |
| 2495 | psrlq mm3, ShiftRem /* shift last 3 bytes to 1st 3 bytes */ |
| 2496 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2497 | movq mm4, mm2 |
| 2498 | punpcklbw mm3, mm0 /* Unpack High bytes of c */ |
| 2499 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2500 | movq mm5, mm1 |
| 2501 | psubw mm4, mm3 |
| 2502 | pxor mm7, mm7 |
| 2503 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2504 | movq mm6, mm4 |
| 2505 | psubw mm5, mm3 |
| 2506 | |
| 2507 | /* pa = abs(p-a) = abs(pav) */ |
| 2508 | /* pb = abs(p-b) = abs(pbv) */ |
| 2509 | /* pc = abs(p-c) = abs(pcv) */ |
| 2510 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2511 | paddw mm6, mm5 |
| 2512 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2513 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2514 | psubw mm4, mm0 |
| 2515 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2516 | psubw mm4, mm0 |
| 2517 | psubw mm5, mm7 |
| 2518 | pxor mm0, mm0 |
| 2519 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2520 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2521 | psubw mm5, mm7 |
| 2522 | psubw mm6, mm0 |
| 2523 | /* test pa <= pb */ |
| 2524 | movq mm7, mm4 |
| 2525 | psubw mm6, mm0 |
| 2526 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2527 | movq mm0, mm7 |
| 2528 | /* use mm7 mask to merge pa & pb */ |
| 2529 | pand mm5, mm7 |
| 2530 | /* use mm0 mask copy to merge a & b */ |
| 2531 | pand mm2, mm0 |
| 2532 | pandn mm7, mm4 |
| 2533 | pandn mm0, mm1 |
| 2534 | paddw mm7, mm5 |
| 2535 | paddw mm0, mm2 |
| 2536 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2537 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2538 | pxor mm1, mm1 |
| 2539 | pand mm3, mm7 |
| 2540 | pandn mm7, mm0 |
| 2541 | paddw mm7, mm3 |
| 2542 | pxor mm0, mm0 |
| 2543 | packuswb mm7, mm1 |
| 2544 | movq mm3, [esi + ebx] /* load c=Prior(x-bpp) */ |
| 2545 | pand mm7, ActiveMask |
| 2546 | movq mm2, mm3 /* load b=Prior(x) step 1 */ |
| 2547 | paddb mm7, [edi + ebx] /* add Paeth predictor with Raw(x) */ |
| 2548 | punpcklbw mm3, mm0 /* Unpack High bytes of c */ |
| 2549 | movq [edi + ebx], mm7 /* write back updated value */ |
| 2550 | movq mm1, mm7 /* Now mm1 will be used as Raw(x-bpp) */ |
| 2551 | /* Now do Paeth for 2nd set of bytes (3-5) */ |
| 2552 | psrlq mm2, ShiftBpp /* load b=Prior(x) step 2 */ |
| 2553 | punpcklbw mm1, mm0 /* Unpack High bytes of a */ |
| 2554 | pxor mm7, mm7 |
| 2555 | punpcklbw mm2, mm0 /* Unpack High bytes of b */ |
| 2556 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2557 | movq mm5, mm1 |
| 2558 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2559 | movq mm4, mm2 |
| 2560 | psubw mm5, mm3 |
| 2561 | psubw mm4, mm3 |
| 2562 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = */ |
| 2563 | /* pav + pbv = pbv + pav */ |
| 2564 | movq mm6, mm5 |
| 2565 | paddw mm6, mm4 |
| 2566 | |
| 2567 | /* pa = abs(p-a) = abs(pav) */ |
| 2568 | /* pb = abs(p-b) = abs(pbv) */ |
| 2569 | /* pc = abs(p-c) = abs(pcv) */ |
| 2570 | pcmpgtw mm0, mm5 /* Create mask pbv bytes < 0 */ |
| 2571 | pcmpgtw mm7, mm4 /* Create mask pav bytes < 0 */ |
| 2572 | pand mm0, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2573 | pand mm7, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2574 | psubw mm5, mm0 |
| 2575 | psubw mm4, mm7 |
| 2576 | psubw mm5, mm0 |
| 2577 | psubw mm4, mm7 |
| 2578 | pxor mm0, mm0 |
| 2579 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2580 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2581 | psubw mm6, mm0 |
| 2582 | /* test pa <= pb */ |
| 2583 | movq mm7, mm4 |
| 2584 | psubw mm6, mm0 |
| 2585 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2586 | movq mm0, mm7 |
| 2587 | /* use mm7 mask to merge pa & pb */ |
| 2588 | pand mm5, mm7 |
| 2589 | /* use mm0 mask copy to merge a & b */ |
| 2590 | pand mm2, mm0 |
| 2591 | pandn mm7, mm4 |
| 2592 | pandn mm0, mm1 |
| 2593 | paddw mm7, mm5 |
| 2594 | paddw mm0, mm2 |
| 2595 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2596 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2597 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 2598 | pand mm3, mm7 |
| 2599 | pandn mm7, mm0 |
| 2600 | pxor mm1, mm1 |
| 2601 | paddw mm7, mm3 |
| 2602 | pxor mm0, mm0 |
| 2603 | packuswb mm7, mm1 |
| 2604 | movq mm3, mm2 /* load c=Prior(x-bpp) step 1 */ |
| 2605 | pand mm7, ActiveMask |
| 2606 | punpckhbw mm2, mm0 /* Unpack High bytes of b */ |
| 2607 | psllq mm7, ShiftBpp /* Shift bytes to 2nd group of 3 bytes */ |
| 2608 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2609 | movq mm4, mm2 |
| 2610 | paddb mm7, [edi + ebx] /* add Paeth predictor with Raw(x) */ |
| 2611 | psllq mm3, ShiftBpp /* load c=Prior(x-bpp) step 2 */ |
| 2612 | movq [edi + ebx], mm7 /* write back updated value */ |
| 2613 | movq mm1, mm7 |
| 2614 | punpckhbw mm3, mm0 /* Unpack High bytes of c */ |
| 2615 | psllq mm1, ShiftBpp /* Shift bytes */ |
| 2616 | /* Now mm1 will be used as Raw(x-bpp) */ |
| 2617 | /* Now do Paeth for 3rd, and final, set of bytes (6-7) */ |
| 2618 | pxor mm7, mm7 |
| 2619 | punpckhbw mm1, mm0 /* Unpack High bytes of a */ |
| 2620 | psubw mm4, mm3 |
| 2621 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2622 | movq mm5, mm1 |
| 2623 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2624 | movq mm6, mm4 |
| 2625 | psubw mm5, mm3 |
| 2626 | pxor mm0, mm0 |
| 2627 | paddw mm6, mm5 |
| 2628 | |
| 2629 | /* pa = abs(p-a) = abs(pav) */ |
| 2630 | /* pb = abs(p-b) = abs(pbv) */ |
| 2631 | /* pc = abs(p-c) = abs(pcv) */ |
| 2632 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2633 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2634 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2635 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2636 | psubw mm4, mm0 |
| 2637 | psubw mm5, mm7 |
| 2638 | psubw mm4, mm0 |
| 2639 | psubw mm5, mm7 |
| 2640 | pxor mm0, mm0 |
| 2641 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2642 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2643 | psubw mm6, mm0 |
| 2644 | /* test pa <= pb */ |
| 2645 | movq mm7, mm4 |
| 2646 | psubw mm6, mm0 |
| 2647 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2648 | movq mm0, mm7 |
| 2649 | /* use mm0 mask copy to merge a & b */ |
| 2650 | pand mm2, mm0 |
| 2651 | /* use mm7 mask to merge pa & pb */ |
| 2652 | pand mm5, mm7 |
| 2653 | pandn mm0, mm1 |
| 2654 | pandn mm7, mm4 |
| 2655 | paddw mm0, mm2 |
| 2656 | paddw mm7, mm5 |
| 2657 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2658 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2659 | pand mm3, mm7 |
| 2660 | pandn mm7, mm0 |
| 2661 | paddw mm7, mm3 |
| 2662 | pxor mm1, mm1 |
| 2663 | packuswb mm1, mm7 |
| 2664 | /* Step ebx to next set of 8 bytes and repeat loop til done */ |
| 2665 | add ebx, 8 |
| 2666 | pand mm1, ActiveMaskEnd |
| 2667 | paddb mm1, [edi + ebx - 8] /* add Paeth predictor with Raw(x) */ |
| 2668 | |
| 2669 | cmp ebx, MMXLength |
| 2670 | pxor mm0, mm0 /* pxor does not affect flags */ |
| 2671 | movq [edi + ebx - 8], mm1 /* write back updated value */ |
| 2672 | /* mm1 will be used as Raw(x-bpp) next loop */ |
| 2673 | /* mm3 ready to be used as Prior(x-bpp) next loop */ |
| 2674 | jb dpth3lp |
| 2675 | } /* end _asm block */ |
| 2676 | } |
| 2677 | break; |
| 2678 | |
| 2679 | case 6: |
| 2680 | case 7: |
| 2681 | case 5: |
| 2682 | { |
| 2683 | ActiveMask.use = 0x00000000ffffffff; |
| 2684 | ActiveMask2.use = 0xffffffff00000000; |
| 2685 | ShiftBpp.use = bpp << 3; /* == bpp * 8 */ |
| 2686 | ShiftRem.use = 64 - ShiftBpp.use; |
| 2687 | _asm |
| 2688 | { |
| 2689 | mov ebx, diff |
| 2690 | mov edi, row |
| 2691 | mov esi, prev_row |
| 2692 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2693 | movq mm1, [edi+ebx-8] |
| 2694 | pxor mm0, mm0 |
| 2695 | dpth6lp: |
| 2696 | /* Must shift to position Raw(x-bpp) data */ |
| 2697 | psrlq mm1, ShiftRem |
| 2698 | /* Do first set of 4 bytes */ |
| 2699 | movq mm3, [esi+ebx-8] /* read c=Prior(x-bpp) bytes */ |
| 2700 | punpcklbw mm1, mm0 /* Unpack Low bytes of a */ |
| 2701 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 2702 | punpcklbw mm2, mm0 /* Unpack Low bytes of b */ |
| 2703 | /* Must shift to position Prior(x-bpp) data */ |
| 2704 | psrlq mm3, ShiftRem |
| 2705 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2706 | movq mm4, mm2 |
| 2707 | punpcklbw mm3, mm0 /* Unpack Low bytes of c */ |
| 2708 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2709 | movq mm5, mm1 |
| 2710 | psubw mm4, mm3 |
| 2711 | pxor mm7, mm7 |
| 2712 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2713 | movq mm6, mm4 |
| 2714 | psubw mm5, mm3 |
| 2715 | /* pa = abs(p-a) = abs(pav) */ |
| 2716 | /* pb = abs(p-b) = abs(pbv) */ |
| 2717 | /* pc = abs(p-c) = abs(pcv) */ |
| 2718 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2719 | paddw mm6, mm5 |
| 2720 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2721 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2722 | psubw mm4, mm0 |
| 2723 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2724 | psubw mm4, mm0 |
| 2725 | psubw mm5, mm7 |
| 2726 | pxor mm0, mm0 |
| 2727 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2728 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2729 | psubw mm5, mm7 |
| 2730 | psubw mm6, mm0 |
| 2731 | /* test pa <= pb */ |
| 2732 | movq mm7, mm4 |
| 2733 | psubw mm6, mm0 |
| 2734 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2735 | movq mm0, mm7 |
| 2736 | /* use mm7 mask to merge pa & pb */ |
| 2737 | pand mm5, mm7 |
| 2738 | /* use mm0 mask copy to merge a & b */ |
| 2739 | pand mm2, mm0 |
| 2740 | pandn mm7, mm4 |
| 2741 | pandn mm0, mm1 |
| 2742 | paddw mm7, mm5 |
| 2743 | paddw mm0, mm2 |
| 2744 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2745 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2746 | pxor mm1, mm1 |
| 2747 | pand mm3, mm7 |
| 2748 | pandn mm7, mm0 |
| 2749 | paddw mm7, mm3 |
| 2750 | pxor mm0, mm0 |
| 2751 | packuswb mm7, mm1 |
| 2752 | movq mm3, [esi + ebx - 8] /* load c=Prior(x-bpp) */ |
| 2753 | pand mm7, ActiveMask |
| 2754 | psrlq mm3, ShiftRem |
| 2755 | movq mm2, [esi + ebx] /* load b=Prior(x) step 1 */ |
| 2756 | paddb mm7, [edi + ebx] /* add Paeth predictor with Raw(x) */ |
| 2757 | movq mm6, mm2 |
| 2758 | movq [edi + ebx], mm7 /* write back updated value */ |
| 2759 | movq mm1, [edi+ebx-8] |
| 2760 | psllq mm6, ShiftBpp |
| 2761 | movq mm5, mm7 |
| 2762 | psrlq mm1, ShiftRem |
| 2763 | por mm3, mm6 |
| 2764 | psllq mm5, ShiftBpp |
| 2765 | punpckhbw mm3, mm0 /* Unpack High bytes of c */ |
| 2766 | por mm1, mm5 |
| 2767 | /* Do second set of 4 bytes */ |
| 2768 | punpckhbw mm2, mm0 /* Unpack High bytes of b */ |
| 2769 | punpckhbw mm1, mm0 /* Unpack High bytes of a */ |
| 2770 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2771 | movq mm4, mm2 |
| 2772 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2773 | movq mm5, mm1 |
| 2774 | psubw mm4, mm3 |
| 2775 | pxor mm7, mm7 |
| 2776 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2777 | movq mm6, mm4 |
| 2778 | psubw mm5, mm3 |
| 2779 | /* pa = abs(p-a) = abs(pav) */ |
| 2780 | /* pb = abs(p-b) = abs(pbv) */ |
| 2781 | /* pc = abs(p-c) = abs(pcv) */ |
| 2782 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2783 | paddw mm6, mm5 |
| 2784 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2785 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2786 | psubw mm4, mm0 |
| 2787 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2788 | psubw mm4, mm0 |
| 2789 | psubw mm5, mm7 |
| 2790 | pxor mm0, mm0 |
| 2791 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2792 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2793 | psubw mm5, mm7 |
| 2794 | psubw mm6, mm0 |
| 2795 | /* test pa <= pb */ |
| 2796 | movq mm7, mm4 |
| 2797 | psubw mm6, mm0 |
| 2798 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2799 | movq mm0, mm7 |
| 2800 | /* use mm7 mask to merge pa & pb */ |
| 2801 | pand mm5, mm7 |
| 2802 | /* use mm0 mask copy to merge a & b */ |
| 2803 | pand mm2, mm0 |
| 2804 | pandn mm7, mm4 |
| 2805 | pandn mm0, mm1 |
| 2806 | paddw mm7, mm5 |
| 2807 | paddw mm0, mm2 |
| 2808 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2809 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2810 | pxor mm1, mm1 |
| 2811 | pand mm3, mm7 |
| 2812 | pandn mm7, mm0 |
| 2813 | pxor mm1, mm1 |
| 2814 | paddw mm7, mm3 |
| 2815 | pxor mm0, mm0 |
| 2816 | /* Step ex to next set of 8 bytes and repeat loop til done */ |
| 2817 | add ebx, 8 |
| 2818 | packuswb mm1, mm7 |
| 2819 | paddb mm1, [edi + ebx - 8] /* add Paeth predictor with Raw(x) */ |
| 2820 | cmp ebx, MMXLength |
| 2821 | movq [edi + ebx - 8], mm1 /* write back updated value */ |
| 2822 | /* mm1 will be used as Raw(x-bpp) next loop */ |
| 2823 | jb dpth6lp |
| 2824 | } /* end _asm block */ |
| 2825 | } |
| 2826 | break; |
| 2827 | |
| 2828 | case 4: |
| 2829 | { |
| 2830 | ActiveMask.use = 0x00000000ffffffff; |
| 2831 | _asm { |
| 2832 | mov ebx, diff |
| 2833 | mov edi, row |
| 2834 | mov esi, prev_row |
| 2835 | pxor mm0, mm0 |
| 2836 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2837 | movq mm1, [edi+ebx-8] /* Only time should need to read */ |
| 2838 | /* a=Raw(x-bpp) bytes */ |
| 2839 | dpth4lp: |
| 2840 | /* Do first set of 4 bytes */ |
| 2841 | movq mm3, [esi+ebx-8] /* read c=Prior(x-bpp) bytes */ |
| 2842 | punpckhbw mm1, mm0 /* Unpack Low bytes of a */ |
| 2843 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 2844 | punpcklbw mm2, mm0 /* Unpack High bytes of b */ |
| 2845 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2846 | movq mm4, mm2 |
| 2847 | punpckhbw mm3, mm0 /* Unpack High bytes of c */ |
| 2848 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2849 | movq mm5, mm1 |
| 2850 | psubw mm4, mm3 |
| 2851 | pxor mm7, mm7 |
| 2852 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2853 | movq mm6, mm4 |
| 2854 | psubw mm5, mm3 |
| 2855 | /* pa = abs(p-a) = abs(pav) */ |
| 2856 | /* pb = abs(p-b) = abs(pbv) */ |
| 2857 | /* pc = abs(p-c) = abs(pcv) */ |
| 2858 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2859 | paddw mm6, mm5 |
| 2860 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2861 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2862 | psubw mm4, mm0 |
| 2863 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2864 | psubw mm4, mm0 |
| 2865 | psubw mm5, mm7 |
| 2866 | pxor mm0, mm0 |
| 2867 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2868 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2869 | psubw mm5, mm7 |
| 2870 | psubw mm6, mm0 |
| 2871 | /* test pa <= pb */ |
| 2872 | movq mm7, mm4 |
| 2873 | psubw mm6, mm0 |
| 2874 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2875 | movq mm0, mm7 |
| 2876 | /* use mm7 mask to merge pa & pb */ |
| 2877 | pand mm5, mm7 |
| 2878 | /* use mm0 mask copy to merge a & b */ |
| 2879 | pand mm2, mm0 |
| 2880 | pandn mm7, mm4 |
| 2881 | pandn mm0, mm1 |
| 2882 | paddw mm7, mm5 |
| 2883 | paddw mm0, mm2 |
| 2884 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2885 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2886 | pxor mm1, mm1 |
| 2887 | pand mm3, mm7 |
| 2888 | pandn mm7, mm0 |
| 2889 | paddw mm7, mm3 |
| 2890 | pxor mm0, mm0 |
| 2891 | packuswb mm7, mm1 |
| 2892 | movq mm3, [esi + ebx] /* load c=Prior(x-bpp) */ |
| 2893 | pand mm7, ActiveMask |
| 2894 | movq mm2, mm3 /* load b=Prior(x) step 1 */ |
| 2895 | paddb mm7, [edi + ebx] /* add Paeth predictor with Raw(x) */ |
| 2896 | punpcklbw mm3, mm0 /* Unpack High bytes of c */ |
| 2897 | movq [edi + ebx], mm7 /* write back updated value */ |
| 2898 | movq mm1, mm7 /* Now mm1 will be used as Raw(x-bpp) */ |
| 2899 | /* Do second set of 4 bytes */ |
| 2900 | punpckhbw mm2, mm0 /* Unpack Low bytes of b */ |
| 2901 | punpcklbw mm1, mm0 /* Unpack Low bytes of a */ |
| 2902 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2903 | movq mm4, mm2 |
| 2904 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2905 | movq mm5, mm1 |
| 2906 | psubw mm4, mm3 |
| 2907 | pxor mm7, mm7 |
| 2908 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2909 | movq mm6, mm4 |
| 2910 | psubw mm5, mm3 |
| 2911 | /* pa = abs(p-a) = abs(pav) */ |
| 2912 | /* pb = abs(p-b) = abs(pbv) */ |
| 2913 | /* pc = abs(p-c) = abs(pcv) */ |
| 2914 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2915 | paddw mm6, mm5 |
| 2916 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2917 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2918 | psubw mm4, mm0 |
| 2919 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2920 | psubw mm4, mm0 |
| 2921 | psubw mm5, mm7 |
| 2922 | pxor mm0, mm0 |
| 2923 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2924 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 2925 | psubw mm5, mm7 |
| 2926 | psubw mm6, mm0 |
| 2927 | /* test pa <= pb */ |
| 2928 | movq mm7, mm4 |
| 2929 | psubw mm6, mm0 |
| 2930 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 2931 | movq mm0, mm7 |
| 2932 | /* use mm7 mask to merge pa & pb */ |
| 2933 | pand mm5, mm7 |
| 2934 | /* use mm0 mask copy to merge a & b */ |
| 2935 | pand mm2, mm0 |
| 2936 | pandn mm7, mm4 |
| 2937 | pandn mm0, mm1 |
| 2938 | paddw mm7, mm5 |
| 2939 | paddw mm0, mm2 |
| 2940 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 2941 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 2942 | pxor mm1, mm1 |
| 2943 | pand mm3, mm7 |
| 2944 | pandn mm7, mm0 |
| 2945 | pxor mm1, mm1 |
| 2946 | paddw mm7, mm3 |
| 2947 | pxor mm0, mm0 |
| 2948 | /* Step ex to next set of 8 bytes and repeat loop til done */ |
| 2949 | add ebx, 8 |
| 2950 | packuswb mm1, mm7 |
| 2951 | paddb mm1, [edi + ebx - 8] /* add Paeth predictor with Raw(x) */ |
| 2952 | cmp ebx, MMXLength |
| 2953 | movq [edi + ebx - 8], mm1 /* write back updated value */ |
| 2954 | /* mm1 will be used as Raw(x-bpp) next loop */ |
| 2955 | jb dpth4lp |
| 2956 | } /* end _asm block */ |
| 2957 | } |
| 2958 | break; |
| 2959 | case 8: /* bpp == 8 */ |
| 2960 | { |
| 2961 | ActiveMask.use = 0x00000000ffffffff; |
| 2962 | _asm { |
| 2963 | mov ebx, diff |
| 2964 | mov edi, row |
| 2965 | mov esi, prev_row |
| 2966 | pxor mm0, mm0 |
| 2967 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 2968 | movq mm1, [edi+ebx-8] /* Only time should need to read */ |
| 2969 | /* a=Raw(x-bpp) bytes */ |
| 2970 | dpth8lp: |
| 2971 | /* Do first set of 4 bytes */ |
| 2972 | movq mm3, [esi+ebx-8] /* read c=Prior(x-bpp) bytes */ |
| 2973 | punpcklbw mm1, mm0 /* Unpack Low bytes of a */ |
| 2974 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 2975 | punpcklbw mm2, mm0 /* Unpack Low bytes of b */ |
| 2976 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 2977 | movq mm4, mm2 |
| 2978 | punpcklbw mm3, mm0 /* Unpack Low bytes of c */ |
| 2979 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 2980 | movq mm5, mm1 |
| 2981 | psubw mm4, mm3 |
| 2982 | pxor mm7, mm7 |
| 2983 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 2984 | movq mm6, mm4 |
| 2985 | psubw mm5, mm3 |
| 2986 | /* pa = abs(p-a) = abs(pav) */ |
| 2987 | /* pb = abs(p-b) = abs(pbv) */ |
| 2988 | /* pc = abs(p-c) = abs(pcv) */ |
| 2989 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 2990 | paddw mm6, mm5 |
| 2991 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 2992 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 2993 | psubw mm4, mm0 |
| 2994 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 2995 | psubw mm4, mm0 |
| 2996 | psubw mm5, mm7 |
| 2997 | pxor mm0, mm0 |
| 2998 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 2999 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 3000 | psubw mm5, mm7 |
| 3001 | psubw mm6, mm0 |
| 3002 | /* test pa <= pb */ |
| 3003 | movq mm7, mm4 |
| 3004 | psubw mm6, mm0 |
| 3005 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 3006 | movq mm0, mm7 |
| 3007 | /* use mm7 mask to merge pa & pb */ |
| 3008 | pand mm5, mm7 |
| 3009 | /* use mm0 mask copy to merge a & b */ |
| 3010 | pand mm2, mm0 |
| 3011 | pandn mm7, mm4 |
| 3012 | pandn mm0, mm1 |
| 3013 | paddw mm7, mm5 |
| 3014 | paddw mm0, mm2 |
| 3015 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 3016 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 3017 | pxor mm1, mm1 |
| 3018 | pand mm3, mm7 |
| 3019 | pandn mm7, mm0 |
| 3020 | paddw mm7, mm3 |
| 3021 | pxor mm0, mm0 |
| 3022 | packuswb mm7, mm1 |
| 3023 | movq mm3, [esi+ebx-8] /* read c=Prior(x-bpp) bytes */ |
| 3024 | pand mm7, ActiveMask |
| 3025 | movq mm2, [esi + ebx] /* load b=Prior(x) */ |
| 3026 | paddb mm7, [edi + ebx] /* add Paeth predictor with Raw(x) */ |
| 3027 | punpckhbw mm3, mm0 /* Unpack High bytes of c */ |
| 3028 | movq [edi + ebx], mm7 /* write back updated value */ |
| 3029 | movq mm1, [edi+ebx-8] /* read a=Raw(x-bpp) bytes */ |
| 3030 | |
| 3031 | /* Do second set of 4 bytes */ |
| 3032 | punpckhbw mm2, mm0 /* Unpack High bytes of b */ |
| 3033 | punpckhbw mm1, mm0 /* Unpack High bytes of a */ |
| 3034 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 3035 | movq mm4, mm2 |
| 3036 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 3037 | movq mm5, mm1 |
| 3038 | psubw mm4, mm3 |
| 3039 | pxor mm7, mm7 |
| 3040 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 3041 | movq mm6, mm4 |
| 3042 | psubw mm5, mm3 |
| 3043 | /* pa = abs(p-a) = abs(pav) */ |
| 3044 | /* pb = abs(p-b) = abs(pbv) */ |
| 3045 | /* pc = abs(p-c) = abs(pcv) */ |
| 3046 | pcmpgtw mm0, mm4 /* Create mask pav bytes < 0 */ |
| 3047 | paddw mm6, mm5 |
| 3048 | pand mm0, mm4 /* Only pav bytes < 0 in mm7 */ |
| 3049 | pcmpgtw mm7, mm5 /* Create mask pbv bytes < 0 */ |
| 3050 | psubw mm4, mm0 |
| 3051 | pand mm7, mm5 /* Only pbv bytes < 0 in mm0 */ |
| 3052 | psubw mm4, mm0 |
| 3053 | psubw mm5, mm7 |
| 3054 | pxor mm0, mm0 |
| 3055 | pcmpgtw mm0, mm6 /* Create mask pcv bytes < 0 */ |
| 3056 | pand mm0, mm6 /* Only pav bytes < 0 in mm7 */ |
| 3057 | psubw mm5, mm7 |
| 3058 | psubw mm6, mm0 |
| 3059 | /* test pa <= pb */ |
| 3060 | movq mm7, mm4 |
| 3061 | psubw mm6, mm0 |
| 3062 | pcmpgtw mm7, mm5 /* pa > pb? */ |
| 3063 | movq mm0, mm7 |
| 3064 | /* use mm7 mask to merge pa & pb */ |
| 3065 | pand mm5, mm7 |
| 3066 | /* use mm0 mask copy to merge a & b */ |
| 3067 | pand mm2, mm0 |
| 3068 | pandn mm7, mm4 |
| 3069 | pandn mm0, mm1 |
| 3070 | paddw mm7, mm5 |
| 3071 | paddw mm0, mm2 |
| 3072 | /* test ((pa <= pb)? pa:pb) <= pc */ |
| 3073 | pcmpgtw mm7, mm6 /* pab > pc? */ |
| 3074 | pxor mm1, mm1 |
| 3075 | pand mm3, mm7 |
| 3076 | pandn mm7, mm0 |
| 3077 | pxor mm1, mm1 |
| 3078 | paddw mm7, mm3 |
| 3079 | pxor mm0, mm0 |
| 3080 | /* Step ex to next set of 8 bytes and repeat loop til done */ |
| 3081 | add ebx, 8 |
| 3082 | packuswb mm1, mm7 |
| 3083 | paddb mm1, [edi + ebx - 8] /* add Paeth predictor with Raw(x) */ |
| 3084 | cmp ebx, MMXLength |
| 3085 | movq [edi + ebx - 8], mm1 /* write back updated value */ |
| 3086 | /* mm1 will be used as Raw(x-bpp) next loop */ |
| 3087 | jb dpth8lp |
| 3088 | } /* end _asm block */ |
| 3089 | } |
| 3090 | break; |
| 3091 | |
| 3092 | case 1: /* bpp = 1 */ |
| 3093 | case 2: /* bpp = 2 */ |
| 3094 | default: /* bpp > 8 */ |
| 3095 | { |
| 3096 | _asm { |
| 3097 | mov ebx, diff |
| 3098 | cmp ebx, FullLength |
| 3099 | jnb dpthdend |
| 3100 | mov edi, row |
| 3101 | mov esi, prev_row |
| 3102 | /* Do Paeth decode for remaining bytes */ |
| 3103 | mov edx, ebx |
| 3104 | xor ecx, ecx /* zero ecx before using cl & cx in loop below */ |
| 3105 | sub edx, bpp /* Set edx = ebx - bpp */ |
| 3106 | dpthdlp: |
| 3107 | xor eax, eax |
| 3108 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 3109 | mov al, [esi + ebx] /* load Prior(x) into al */ |
| 3110 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3111 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 3112 | mov patemp, eax /* Save pav for later use */ |
| 3113 | xor eax, eax |
| 3114 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 3115 | mov al, [edi + edx] /* load Raw(x-bpp) into al */ |
| 3116 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 3117 | mov ecx, eax |
| 3118 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 3119 | add eax, patemp /* pcv = pav + pbv */ |
| 3120 | /* pc = abs(pcv) */ |
| 3121 | test eax, 0x80000000 |
| 3122 | jz dpthdpca |
| 3123 | neg eax /* reverse sign of neg values */ |
| 3124 | dpthdpca: |
| 3125 | mov pctemp, eax /* save pc for later use */ |
| 3126 | /* pb = abs(pbv) */ |
| 3127 | test ecx, 0x80000000 |
| 3128 | jz dpthdpba |
| 3129 | neg ecx /* reverse sign of neg values */ |
| 3130 | dpthdpba: |
| 3131 | mov pbtemp, ecx /* save pb for later use */ |
| 3132 | /* pa = abs(pav) */ |
| 3133 | mov eax, patemp |
| 3134 | test eax, 0x80000000 |
| 3135 | jz dpthdpaa |
| 3136 | neg eax /* reverse sign of neg values */ |
| 3137 | dpthdpaa: |
| 3138 | mov patemp, eax /* save pa for later use */ |
| 3139 | /* test if pa <= pb */ |
| 3140 | cmp eax, ecx |
| 3141 | jna dpthdabb |
| 3142 | /* pa > pb; now test if pb <= pc */ |
| 3143 | cmp ecx, pctemp |
| 3144 | jna dpthdbbc |
| 3145 | /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 3146 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3147 | jmp dpthdpaeth |
| 3148 | dpthdbbc: |
| 3149 | /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */ |
| 3150 | mov cl, [esi + ebx] /* load Prior(x) into cl */ |
| 3151 | jmp dpthdpaeth |
| 3152 | dpthdabb: |
| 3153 | /* pa <= pb; now test if pa <= pc */ |
| 3154 | cmp eax, pctemp |
| 3155 | jna dpthdabc |
| 3156 | /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 3157 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3158 | jmp dpthdpaeth |
| 3159 | dpthdabc: |
| 3160 | /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */ |
| 3161 | mov cl, [edi + edx] /* load Raw(x-bpp) into cl */ |
| 3162 | dpthdpaeth: |
| 3163 | inc ebx |
| 3164 | inc edx |
| 3165 | /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */ |
| 3166 | add [edi + ebx - 1], cl |
| 3167 | cmp ebx, FullLength |
| 3168 | jb dpthdlp |
| 3169 | dpthdend: |
| 3170 | } /* end _asm block */ |
| 3171 | } |
| 3172 | return; /* No need to go further with this one */ |
| 3173 | } /* end switch ( bpp ) */ |
| 3174 | _asm |
| 3175 | { |
| 3176 | /* MMX acceleration complete now do clean-up */ |
| 3177 | /* Check if any remaining bytes left to decode */ |
| 3178 | mov ebx, MMXLength |
| 3179 | cmp ebx, FullLength |
| 3180 | jnb dpthend |
| 3181 | mov edi, row |
| 3182 | mov esi, prev_row |
| 3183 | /* Do Paeth decode for remaining bytes */ |
| 3184 | mov edx, ebx |
| 3185 | xor ecx, ecx /* zero ecx before using cl & cx in loop below */ |
| 3186 | sub edx, bpp /* Set edx = ebx - bpp */ |
| 3187 | dpthlp2: |
| 3188 | xor eax, eax |
| 3189 | /* pav = p - a = (a + b - c) - a = b - c */ |
| 3190 | mov al, [esi + ebx] /* load Prior(x) into al */ |
| 3191 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3192 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 3193 | mov patemp, eax /* Save pav for later use */ |
| 3194 | xor eax, eax |
| 3195 | /* pbv = p - b = (a + b - c) - b = a - c */ |
| 3196 | mov al, [edi + edx] /* load Raw(x-bpp) into al */ |
| 3197 | sub eax, ecx /* subtract Prior(x-bpp) */ |
| 3198 | mov ecx, eax |
| 3199 | /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */ |
| 3200 | add eax, patemp /* pcv = pav + pbv */ |
| 3201 | /* pc = abs(pcv) */ |
| 3202 | test eax, 0x80000000 |
| 3203 | jz dpthpca2 |
| 3204 | neg eax /* reverse sign of neg values */ |
| 3205 | dpthpca2: |
| 3206 | mov pctemp, eax /* save pc for later use */ |
| 3207 | /* pb = abs(pbv) */ |
| 3208 | test ecx, 0x80000000 |
| 3209 | jz dpthpba2 |
| 3210 | neg ecx /* reverse sign of neg values */ |
| 3211 | dpthpba2: |
| 3212 | mov pbtemp, ecx /* save pb for later use */ |
| 3213 | /* pa = abs(pav) */ |
| 3214 | mov eax, patemp |
| 3215 | test eax, 0x80000000 |
| 3216 | jz dpthpaa2 |
| 3217 | neg eax /* reverse sign of neg values */ |
| 3218 | dpthpaa2: |
| 3219 | mov patemp, eax /* save pa for later use */ |
| 3220 | /* test if pa <= pb */ |
| 3221 | cmp eax, ecx |
| 3222 | jna dpthabb2 |
| 3223 | /* pa > pb; now test if pb <= pc */ |
| 3224 | cmp ecx, pctemp |
| 3225 | jna dpthbbc2 |
| 3226 | /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 3227 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3228 | jmp dpthpaeth2 |
| 3229 | dpthbbc2: |
| 3230 | /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */ |
| 3231 | mov cl, [esi + ebx] /* load Prior(x) into cl */ |
| 3232 | jmp dpthpaeth2 |
| 3233 | dpthabb2: |
| 3234 | /* pa <= pb; now test if pa <= pc */ |
| 3235 | cmp eax, pctemp |
| 3236 | jna dpthabc2 |
| 3237 | /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */ |
| 3238 | mov cl, [esi + edx] /* load Prior(x-bpp) into cl */ |
| 3239 | jmp dpthpaeth2 |
| 3240 | dpthabc2: |
| 3241 | /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */ |
| 3242 | mov cl, [edi + edx] /* load Raw(x-bpp) into cl */ |
| 3243 | dpthpaeth2: |
| 3244 | inc ebx |
| 3245 | inc edx |
| 3246 | /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */ |
| 3247 | add [edi + ebx - 1], cl |
| 3248 | cmp ebx, FullLength |
| 3249 | jb dpthlp2 |
| 3250 | dpthend: |
| 3251 | emms /* End MMX instructions; prep for possible FP instrs. */ |
| 3252 | } /* end _asm block */ |
| 3253 | } |
| 3254 | |
| 3255 | /* Optimized code for PNG Sub filter decoder */ |
| 3256 | void /* PRIVATE */ |
| 3257 | png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row) |
| 3258 | { |
| 3259 | /*int test; */ |
| 3260 | int bpp; |
| 3261 | png_uint_32 FullLength; |
| 3262 | png_uint_32 MMXLength; |
| 3263 | int diff; |
| 3264 | |
| 3265 | bpp = (row_info->pixel_depth + 7) >> 3; /* Get # bytes per pixel */ |
| 3266 | FullLength = row_info->rowbytes - bpp; /* # of bytes to filter */ |
| 3267 | _asm { |
| 3268 | mov edi, row |
| 3269 | mov esi, edi /* lp = row */ |
| 3270 | add edi, bpp /* rp = row + bpp */ |
| 3271 | xor eax, eax |
| 3272 | /* get # of bytes to alignment */ |
| 3273 | mov diff, edi /* take start of row */ |
| 3274 | add diff, 0xf /* add 7 + 8 to incr past */ |
| 3275 | /* alignment boundary */ |
| 3276 | xor ebx, ebx |
| 3277 | and diff, 0xfffffff8 /* mask to alignment boundary */ |
| 3278 | sub diff, edi /* subtract from start ==> value */ |
| 3279 | /* ebx at alignment */ |
| 3280 | jz dsubgo |
| 3281 | /* fix alignment */ |
| 3282 | dsublp1: |
| 3283 | mov al, [esi+ebx] |
| 3284 | add [edi+ebx], al |
| 3285 | inc ebx |
| 3286 | cmp ebx, diff |
| 3287 | jb dsublp1 |
| 3288 | dsubgo: |
| 3289 | mov ecx, FullLength |
| 3290 | mov edx, ecx |
| 3291 | sub edx, ebx /* subtract alignment fix */ |
| 3292 | and edx, 0x00000007 /* calc bytes over mult of 8 */ |
| 3293 | sub ecx, edx /* drop over bytes from length */ |
| 3294 | mov MMXLength, ecx |
| 3295 | } /* end _asm block */ |
| 3296 | |
| 3297 | /* Now do the math for the rest of the row */ |
| 3298 | switch ( bpp ) |
| 3299 | { |
| 3300 | case 3: |
| 3301 | { |
| 3302 | ActiveMask.use = 0x0000ffffff000000; |
| 3303 | ShiftBpp.use = 24; /* == 3 * 8 */ |
| 3304 | ShiftRem.use = 40; /* == 64 - 24 */ |
| 3305 | _asm { |
| 3306 | mov edi, row |
| 3307 | movq mm7, ActiveMask /* Load ActiveMask for 2nd active byte group */ |
| 3308 | mov esi, edi /* lp = row */ |
| 3309 | add edi, bpp /* rp = row + bpp */ |
| 3310 | movq mm6, mm7 |
| 3311 | mov ebx, diff |
| 3312 | psllq mm6, ShiftBpp /* Move mask in mm6 to cover 3rd active */ |
| 3313 | /* byte group */ |
| 3314 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 3315 | movq mm1, [edi+ebx-8] |
| 3316 | dsub3lp: |
| 3317 | psrlq mm1, ShiftRem /* Shift data for adding 1st bpp bytes */ |
| 3318 | /* no need for mask; shift clears inactive bytes */ |
| 3319 | /* Add 1st active group */ |
| 3320 | movq mm0, [edi+ebx] |
| 3321 | paddb mm0, mm1 |
| 3322 | /* Add 2nd active group */ |
| 3323 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3324 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3325 | pand mm1, mm7 /* mask to use only 2nd active group */ |
| 3326 | paddb mm0, mm1 |
| 3327 | /* Add 3rd active group */ |
| 3328 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3329 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3330 | pand mm1, mm6 /* mask to use only 3rd active group */ |
| 3331 | add ebx, 8 |
| 3332 | paddb mm0, mm1 |
| 3333 | cmp ebx, MMXLength |
| 3334 | movq [edi+ebx-8], mm0 /* Write updated Raws back to array */ |
| 3335 | /* Prep for doing 1st add at top of loop */ |
| 3336 | movq mm1, mm0 |
| 3337 | jb dsub3lp |
| 3338 | } /* end _asm block */ |
| 3339 | } |
| 3340 | break; |
| 3341 | |
| 3342 | case 1: |
| 3343 | { |
| 3344 | /* Placed here just in case this is a duplicate of the */ |
| 3345 | /* non-MMX code for the SUB filter in png_read_filter_row below */ |
| 3346 | // |
| 3347 | /* png_bytep rp; */ |
| 3348 | /* png_bytep lp; */ |
| 3349 | /* png_uint_32 i; */ |
| 3350 | /* bpp = (row_info->pixel_depth + 7) >> 3; */ |
| 3351 | /* for (i = (png_uint_32)bpp, rp = row + bpp, lp = row; */ |
| 3352 | /* i < row_info->rowbytes; i++, rp++, lp++) */ |
| 3353 | /* { */ |
| 3354 | /* *rp = (png_byte)(((int)(*rp) + (int)(*lp)) & 0xff); */ |
| 3355 | /* } */ |
| 3356 | _asm { |
| 3357 | mov ebx, diff |
| 3358 | mov edi, row |
| 3359 | cmp ebx, FullLength |
| 3360 | jnb dsub1end |
| 3361 | mov esi, edi /* lp = row */ |
| 3362 | xor eax, eax |
| 3363 | add edi, bpp /* rp = row + bpp */ |
| 3364 | dsub1lp: |
| 3365 | mov al, [esi+ebx] |
| 3366 | add [edi+ebx], al |
| 3367 | inc ebx |
| 3368 | cmp ebx, FullLength |
| 3369 | jb dsub1lp |
| 3370 | dsub1end: |
| 3371 | } /* end _asm block */ |
| 3372 | } |
| 3373 | return; |
| 3374 | |
| 3375 | case 6: |
| 3376 | case 7: |
| 3377 | case 4: |
| 3378 | case 5: |
| 3379 | { |
| 3380 | ShiftBpp.use = bpp << 3; |
| 3381 | ShiftRem.use = 64 - ShiftBpp.use; |
| 3382 | _asm { |
| 3383 | mov edi, row |
| 3384 | mov ebx, diff |
| 3385 | mov esi, edi /* lp = row */ |
| 3386 | add edi, bpp /* rp = row + bpp */ |
| 3387 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 3388 | movq mm1, [edi+ebx-8] |
| 3389 | dsub4lp: |
| 3390 | psrlq mm1, ShiftRem /* Shift data for adding 1st bpp bytes */ |
| 3391 | /* no need for mask; shift clears inactive bytes */ |
| 3392 | movq mm0, [edi+ebx] |
| 3393 | paddb mm0, mm1 |
| 3394 | /* Add 2nd active group */ |
| 3395 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3396 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3397 | /* there is no need for any mask */ |
| 3398 | /* since shift clears inactive bits/bytes */ |
| 3399 | add ebx, 8 |
| 3400 | paddb mm0, mm1 |
| 3401 | cmp ebx, MMXLength |
| 3402 | movq [edi+ebx-8], mm0 |
| 3403 | movq mm1, mm0 /* Prep for doing 1st add at top of loop */ |
| 3404 | jb dsub4lp |
| 3405 | } /* end _asm block */ |
| 3406 | } |
| 3407 | break; |
| 3408 | |
| 3409 | case 2: |
| 3410 | { |
| 3411 | ActiveMask.use = 0x00000000ffff0000; |
| 3412 | ShiftBpp.use = 16; /* == 2 * 8 */ |
| 3413 | ShiftRem.use = 48; /* == 64 - 16 */ |
| 3414 | _asm { |
| 3415 | movq mm7, ActiveMask /* Load ActiveMask for 2nd active byte group */ |
| 3416 | mov ebx, diff |
| 3417 | movq mm6, mm7 |
| 3418 | mov edi, row |
| 3419 | psllq mm6, ShiftBpp /* Move mask in mm6 to cover 3rd active */ |
| 3420 | /* byte group */ |
| 3421 | mov esi, edi /* lp = row */ |
| 3422 | movq mm5, mm6 |
| 3423 | add edi, bpp /* rp = row + bpp */ |
| 3424 | psllq mm5, ShiftBpp /* Move mask in mm5 to cover 4th active */ |
| 3425 | /* byte group */ |
| 3426 | /* PRIME the pump (load the first Raw(x-bpp) data set */ |
| 3427 | movq mm1, [edi+ebx-8] |
| 3428 | dsub2lp: |
| 3429 | /* Add 1st active group */ |
| 3430 | psrlq mm1, ShiftRem /* Shift data for adding 1st bpp bytes */ |
| 3431 | /* no need for mask; shift clears inactive */ |
| 3432 | /* bytes */ |
| 3433 | movq mm0, [edi+ebx] |
| 3434 | paddb mm0, mm1 |
| 3435 | /* Add 2nd active group */ |
| 3436 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3437 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3438 | pand mm1, mm7 /* mask to use only 2nd active group */ |
| 3439 | paddb mm0, mm1 |
| 3440 | /* Add 3rd active group */ |
| 3441 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3442 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3443 | pand mm1, mm6 /* mask to use only 3rd active group */ |
| 3444 | paddb mm0, mm1 |
| 3445 | /* Add 4th active group */ |
| 3446 | movq mm1, mm0 /* mov updated Raws to mm1 */ |
| 3447 | psllq mm1, ShiftBpp /* shift data to position correctly */ |
| 3448 | pand mm1, mm5 /* mask to use only 4th active group */ |
| 3449 | add ebx, 8 |
| 3450 | paddb mm0, mm1 |
| 3451 | cmp ebx, MMXLength |
| 3452 | movq [edi+ebx-8], mm0 /* Write updated Raws back to array */ |
| 3453 | movq mm1, mm0 /* Prep for doing 1st add at top of loop */ |
| 3454 | jb dsub2lp |
| 3455 | } /* end _asm block */ |
| 3456 | } |
| 3457 | break; |
| 3458 | case 8: |
| 3459 | { |
| 3460 | _asm { |
| 3461 | mov edi, row |
| 3462 | mov ebx, diff |
| 3463 | mov esi, edi /* lp = row */ |
| 3464 | add edi, bpp /* rp = row + bpp */ |
| 3465 | mov ecx, MMXLength |
| 3466 | movq mm7, [edi+ebx-8] /* PRIME the pump (load the first */ |
| 3467 | /* Raw(x-bpp) data set */ |
| 3468 | and ecx, 0x0000003f /* calc bytes over mult of 64 */ |
| 3469 | dsub8lp: |
| 3470 | movq mm0, [edi+ebx] /* Load Sub(x) for 1st 8 bytes */ |
| 3471 | paddb mm0, mm7 |
| 3472 | movq mm1, [edi+ebx+8] /* Load Sub(x) for 2nd 8 bytes */ |
| 3473 | movq [edi+ebx], mm0 /* Write Raw(x) for 1st 8 bytes */ |
| 3474 | /* Now mm0 will be used as Raw(x-bpp) for */ |
| 3475 | /* the 2nd group of 8 bytes. This will be */ |
| 3476 | /* repeated for each group of 8 bytes with */ |
| 3477 | /* the 8th group being used as the Raw(x-bpp) */ |
| 3478 | /* for the 1st group of the next loop. */ |
| 3479 | paddb mm1, mm0 |
| 3480 | movq mm2, [edi+ebx+16] /* Load Sub(x) for 3rd 8 bytes */ |
| 3481 | movq [edi+ebx+8], mm1 /* Write Raw(x) for 2nd 8 bytes */ |
| 3482 | paddb mm2, mm1 |
| 3483 | movq mm3, [edi+ebx+24] /* Load Sub(x) for 4th 8 bytes */ |
| 3484 | movq [edi+ebx+16], mm2 /* Write Raw(x) for 3rd 8 bytes */ |
| 3485 | paddb mm3, mm2 |
| 3486 | movq mm4, [edi+ebx+32] /* Load Sub(x) for 5th 8 bytes */ |
| 3487 | movq [edi+ebx+24], mm3 /* Write Raw(x) for 4th 8 bytes */ |
| 3488 | paddb mm4, mm3 |
| 3489 | movq mm5, [edi+ebx+40] /* Load Sub(x) for 6th 8 bytes */ |
| 3490 | movq [edi+ebx+32], mm4 /* Write Raw(x) for 5th 8 bytes */ |
| 3491 | paddb mm5, mm4 |
| 3492 | movq mm6, [edi+ebx+48] /* Load Sub(x) for 7th 8 bytes */ |
| 3493 | movq [edi+ebx+40], mm5 /* Write Raw(x) for 6th 8 bytes */ |
| 3494 | paddb mm6, mm5 |
| 3495 | movq mm7, [edi+ebx+56] /* Load Sub(x) for 8th 8 bytes */ |
| 3496 | movq [edi+ebx+48], mm6 /* Write Raw(x) for 7th 8 bytes */ |
| 3497 | add ebx, 64 |
| 3498 | paddb mm7, mm6 |
| 3499 | cmp ebx, ecx |
| 3500 | movq [edi+ebx-8], mm7 /* Write Raw(x) for 8th 8 bytes */ |
| 3501 | jb dsub8lp |
| 3502 | cmp ebx, MMXLength |
| 3503 | jnb dsub8lt8 |
| 3504 | dsub8lpA: |
| 3505 | movq mm0, [edi+ebx] |
| 3506 | add ebx, 8 |
| 3507 | paddb mm0, mm7 |
| 3508 | cmp ebx, MMXLength |
| 3509 | movq [edi+ebx-8], mm0 /* use -8 to offset early add to ebx */ |
| 3510 | movq mm7, mm0 /* Move calculated Raw(x) data to mm1 to */ |
| 3511 | /* be the new Raw(x-bpp) for the next loop */ |
| 3512 | jb dsub8lpA |
| 3513 | dsub8lt8: |
| 3514 | } /* end _asm block */ |
| 3515 | } |
| 3516 | break; |
| 3517 | |
| 3518 | default: /* bpp greater than 8 bytes */ |
| 3519 | { |
| 3520 | _asm { |
| 3521 | mov ebx, diff |
| 3522 | mov edi, row |
| 3523 | mov esi, edi /* lp = row */ |
| 3524 | add edi, bpp /* rp = row + bpp */ |
| 3525 | dsubAlp: |
| 3526 | movq mm0, [edi+ebx] |
| 3527 | movq mm1, [esi+ebx] |
| 3528 | add ebx, 8 |
| 3529 | paddb mm0, mm1 |
| 3530 | cmp ebx, MMXLength |
| 3531 | movq [edi+ebx-8], mm0 /* mov does not affect flags; -8 to offset */ |
| 3532 | /* add ebx */ |
| 3533 | jb dsubAlp |
| 3534 | } /* end _asm block */ |
| 3535 | } |
| 3536 | break; |
| 3537 | |
| 3538 | } /* end switch ( bpp ) */ |
| 3539 | |
| 3540 | _asm { |
| 3541 | mov ebx, MMXLength |
| 3542 | mov edi, row |
| 3543 | cmp ebx, FullLength |
| 3544 | jnb dsubend |
| 3545 | mov esi, edi /* lp = row */ |
| 3546 | xor eax, eax |
| 3547 | add edi, bpp /* rp = row + bpp */ |
| 3548 | dsublp2: |
| 3549 | mov al, [esi+ebx] |
| 3550 | add [edi+ebx], al |
| 3551 | inc ebx |
| 3552 | cmp ebx, FullLength |
| 3553 | jb dsublp2 |
| 3554 | dsubend: |
| 3555 | emms /* End MMX instructions; prep for possible FP instrs. */ |
| 3556 | } /* end _asm block */ |
| 3557 | } |
| 3558 | |
| 3559 | /* Optimized code for PNG Up filter decoder */ |
| 3560 | void /* PRIVATE */ |
| 3561 | png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row, |
| 3562 | png_bytep prev_row) |
| 3563 | { |
| 3564 | png_uint_32 len; |
| 3565 | len = row_info->rowbytes; /* # of bytes to filter */ |
| 3566 | _asm { |
| 3567 | mov edi, row |
| 3568 | /* get # of bytes to alignment */ |
| 3569 | mov ecx, edi |
| 3570 | xor ebx, ebx |
| 3571 | add ecx, 0x7 |
| 3572 | xor eax, eax |
| 3573 | and ecx, 0xfffffff8 |
| 3574 | mov esi, prev_row |
| 3575 | sub ecx, edi |
| 3576 | jz dupgo |
| 3577 | /* fix alignment */ |
| 3578 | duplp1: |
| 3579 | mov al, [edi+ebx] |
| 3580 | add al, [esi+ebx] |
| 3581 | inc ebx |
| 3582 | cmp ebx, ecx |
| 3583 | mov [edi + ebx-1], al /* mov does not affect flags; -1 to offset inc ebx */ |
| 3584 | jb duplp1 |
| 3585 | dupgo: |
| 3586 | mov ecx, len |
| 3587 | mov edx, ecx |
| 3588 | sub edx, ebx /* subtract alignment fix */ |
| 3589 | and edx, 0x0000003f /* calc bytes over mult of 64 */ |
| 3590 | sub ecx, edx /* drop over bytes from length */ |
| 3591 | /* Unrolled loop - use all MMX registers and interleave to reduce */ |
| 3592 | /* number of branch instructions (loops) and reduce partial stalls */ |
| 3593 | duploop: |
| 3594 | movq mm1, [esi+ebx] |
| 3595 | movq mm0, [edi+ebx] |
| 3596 | movq mm3, [esi+ebx+8] |
| 3597 | paddb mm0, mm1 |
| 3598 | movq mm2, [edi+ebx+8] |
| 3599 | movq [edi+ebx], mm0 |
| 3600 | paddb mm2, mm3 |
| 3601 | movq mm5, [esi+ebx+16] |
| 3602 | movq [edi+ebx+8], mm2 |
| 3603 | movq mm4, [edi+ebx+16] |
| 3604 | movq mm7, [esi+ebx+24] |
| 3605 | paddb mm4, mm5 |
| 3606 | movq mm6, [edi+ebx+24] |
| 3607 | movq [edi+ebx+16], mm4 |
| 3608 | paddb mm6, mm7 |
| 3609 | movq mm1, [esi+ebx+32] |
| 3610 | movq [edi+ebx+24], mm6 |
| 3611 | movq mm0, [edi+ebx+32] |
| 3612 | movq mm3, [esi+ebx+40] |
| 3613 | paddb mm0, mm1 |
| 3614 | movq mm2, [edi+ebx+40] |
| 3615 | movq [edi+ebx+32], mm0 |
| 3616 | paddb mm2, mm3 |
| 3617 | movq mm5, [esi+ebx+48] |
| 3618 | movq [edi+ebx+40], mm2 |
| 3619 | movq mm4, [edi+ebx+48] |
| 3620 | movq mm7, [esi+ebx+56] |
| 3621 | paddb mm4, mm5 |
| 3622 | movq mm6, [edi+ebx+56] |
| 3623 | movq [edi+ebx+48], mm4 |
| 3624 | add ebx, 64 |
| 3625 | paddb mm6, mm7 |
| 3626 | cmp ebx, ecx |
| 3627 | movq [edi+ebx-8], mm6 /* (+56)movq does not affect flags; */ |
| 3628 | /* -8 to offset add ebx */ |
| 3629 | jb duploop |
| 3630 | |
| 3631 | cmp edx, 0 /* Test for bytes over mult of 64 */ |
| 3632 | jz dupend |
| 3633 | |
| 3634 | |
| 3635 | /* 2 lines added by lcreeve@netins.net */ |
| 3636 | /* (mail 11 Jul 98 in png-implement list) */ |
| 3637 | cmp edx, 8 /*test for less than 8 bytes */ |
| 3638 | jb duplt8 |
| 3639 | |
| 3640 | |
| 3641 | add ecx, edx |
| 3642 | and edx, 0x00000007 /* calc bytes over mult of 8 */ |
| 3643 | sub ecx, edx /* drop over bytes from length */ |
| 3644 | jz duplt8 |
| 3645 | /* Loop using MMX registers mm0 & mm1 to update 8 bytes simultaneously */ |
| 3646 | duplpA: |
| 3647 | movq mm1, [esi+ebx] |
| 3648 | movq mm0, [edi+ebx] |
| 3649 | add ebx, 8 |
| 3650 | paddb mm0, mm1 |
| 3651 | cmp ebx, ecx |
| 3652 | movq [edi+ebx-8], mm0 /* movq does not affect flags; -8 to offset add ebx */ |
| 3653 | jb duplpA |
| 3654 | cmp edx, 0 /* Test for bytes over mult of 8 */ |
| 3655 | jz dupend |
| 3656 | duplt8: |
| 3657 | xor eax, eax |
| 3658 | add ecx, edx /* move over byte count into counter */ |
| 3659 | /* Loop using x86 registers to update remaining bytes */ |
| 3660 | duplp2: |
| 3661 | mov al, [edi + ebx] |
| 3662 | add al, [esi + ebx] |
| 3663 | inc ebx |
| 3664 | cmp ebx, ecx |
| 3665 | mov [edi + ebx-1], al /* mov does not affect flags; -1 to offset inc ebx */ |
| 3666 | jb duplp2 |
| 3667 | dupend: |
| 3668 | /* Conversion of filtered row completed */ |
| 3669 | emms /* End MMX instructions; prep for possible FP instrs. */ |
| 3670 | } /* end _asm block */ |
| 3671 | } |
| 3672 | |
| 3673 | |
| 3674 | /* Optimized png_read_filter_row routines */ |
| 3675 | void /* PRIVATE */ |
| 3676 | png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep |
| 3677 | row, png_bytep prev_row, int filter) |
| 3678 | { |
| 3679 | #ifdef PNG_DEBUG |
| 3680 | char filnm[10]; |
| 3681 | #endif |
| 3682 | |
| 3683 | if (mmx_supported == 2) { |
| 3684 | #if !defined(PNG_1_0_X) |
| 3685 | /* this should have happened in png_init_mmx_flags() already */ |
| 3686 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 3687 | #endif |
| 3688 | png_mmx_support(); |
| 3689 | } |
| 3690 | |
| 3691 | #ifdef PNG_DEBUG |
| 3692 | png_debug(1, "in png_read_filter_row\n"); |
| 3693 | switch (filter) |
| 3694 | { |
| 3695 | case 0: sprintf(filnm, "none"); |
| 3696 | break; |
| 3697 | #if !defined(PNG_1_0_X) |
| 3698 | case 1: sprintf(filnm, "sub-%s", |
| 3699 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : "x86"); |
| 3700 | break; |
| 3701 | case 2: sprintf(filnm, "up-%s", |
| 3702 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" : "x86"); |
| 3703 | break; |
| 3704 | case 3: sprintf(filnm, "avg-%s", |
| 3705 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" : "x86"); |
| 3706 | break; |
| 3707 | case 4: sprintf(filnm, "Paeth-%s", |
| 3708 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":"x86"); |
| 3709 | break; |
| 3710 | #else |
| 3711 | case 1: sprintf(filnm, "sub"); |
| 3712 | break; |
| 3713 | case 2: sprintf(filnm, "up"); |
| 3714 | break; |
| 3715 | case 3: sprintf(filnm, "avg"); |
| 3716 | break; |
| 3717 | case 4: sprintf(filnm, "Paeth"); |
| 3718 | break; |
| 3719 | #endif |
| 3720 | default: sprintf(filnm, "unknw"); |
| 3721 | break; |
| 3722 | } |
| 3723 | png_debug2(0,"row=%5d, %s, ", png_ptr->row_number, filnm); |
| 3724 | png_debug2(0, "pd=%2d, b=%d, ", (int)row_info->pixel_depth, |
| 3725 | (int)((row_info->pixel_depth + 7) >> 3)); |
| 3726 | png_debug1(0,"len=%8d, ", row_info->rowbytes); |
| 3727 | #endif /* PNG_DEBUG */ |
| 3728 | |
| 3729 | switch (filter) |
| 3730 | { |
| 3731 | case PNG_FILTER_VALUE_NONE: |
| 3732 | break; |
| 3733 | |
| 3734 | case PNG_FILTER_VALUE_SUB: |
| 3735 | { |
| 3736 | #if !defined(PNG_1_0_X) |
| 3737 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) && |
| 3738 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 3739 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 3740 | #else |
| 3741 | if (mmx_supported) |
| 3742 | #endif |
| 3743 | { |
| 3744 | png_read_filter_row_mmx_sub(row_info, row); |
| 3745 | } |
| 3746 | else |
| 3747 | { |
| 3748 | png_uint_32 i; |
| 3749 | png_uint_32 istop = row_info->rowbytes; |
| 3750 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 3751 | png_bytep rp = row + bpp; |
| 3752 | png_bytep lp = row; |
| 3753 | |
| 3754 | for (i = bpp; i < istop; i++) |
| 3755 | { |
| 3756 | *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); |
| 3757 | rp++; |
| 3758 | } |
| 3759 | } |
| 3760 | break; |
| 3761 | } |
| 3762 | |
| 3763 | case PNG_FILTER_VALUE_UP: |
| 3764 | { |
| 3765 | #if !defined(PNG_1_0_X) |
| 3766 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) && |
| 3767 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 3768 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 3769 | #else |
| 3770 | if (mmx_supported) |
| 3771 | #endif |
| 3772 | { |
| 3773 | png_read_filter_row_mmx_up(row_info, row, prev_row); |
| 3774 | } |
| 3775 | else |
| 3776 | { |
| 3777 | png_uint_32 i; |
| 3778 | png_uint_32 istop = row_info->rowbytes; |
| 3779 | png_bytep rp = row; |
| 3780 | png_bytep pp = prev_row; |
| 3781 | |
| 3782 | for (i = 0; i < istop; ++i) |
| 3783 | { |
| 3784 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
| 3785 | rp++; |
| 3786 | } |
| 3787 | } |
| 3788 | break; |
| 3789 | } |
| 3790 | |
| 3791 | case PNG_FILTER_VALUE_AVG: |
| 3792 | { |
| 3793 | #if !defined(PNG_1_0_X) |
| 3794 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) && |
| 3795 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 3796 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 3797 | #else |
| 3798 | if (mmx_supported) |
| 3799 | #endif |
| 3800 | { |
| 3801 | png_read_filter_row_mmx_avg(row_info, row, prev_row); |
| 3802 | } |
| 3803 | else |
| 3804 | { |
| 3805 | png_uint_32 i; |
| 3806 | png_bytep rp = row; |
| 3807 | png_bytep pp = prev_row; |
| 3808 | png_bytep lp = row; |
| 3809 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 3810 | png_uint_32 istop = row_info->rowbytes - bpp; |
| 3811 | |
| 3812 | for (i = 0; i < bpp; i++) |
| 3813 | { |
| 3814 | *rp = (png_byte)(((int)(*rp) + |
| 3815 | ((int)(*pp++) >> 1)) & 0xff); |
| 3816 | rp++; |
| 3817 | } |
| 3818 | |
| 3819 | for (i = 0; i < istop; i++) |
| 3820 | { |
| 3821 | *rp = (png_byte)(((int)(*rp) + |
| 3822 | ((int)(*pp++ + *lp++) >> 1)) & 0xff); |
| 3823 | rp++; |
| 3824 | } |
| 3825 | } |
| 3826 | break; |
| 3827 | } |
| 3828 | |
| 3829 | case PNG_FILTER_VALUE_PAETH: |
| 3830 | { |
| 3831 | #if !defined(PNG_1_0_X) |
| 3832 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) && |
| 3833 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 3834 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 3835 | #else |
| 3836 | if (mmx_supported) |
| 3837 | #endif |
| 3838 | { |
| 3839 | png_read_filter_row_mmx_paeth(row_info, row, prev_row); |
| 3840 | } |
| 3841 | else |
| 3842 | { |
| 3843 | png_uint_32 i; |
| 3844 | png_bytep rp = row; |
| 3845 | png_bytep pp = prev_row; |
| 3846 | png_bytep lp = row; |
| 3847 | png_bytep cp = prev_row; |
| 3848 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 3849 | png_uint_32 istop=row_info->rowbytes - bpp; |
| 3850 | |
| 3851 | for (i = 0; i < bpp; i++) |
| 3852 | { |
| 3853 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
| 3854 | rp++; |
| 3855 | } |
| 3856 | |
| 3857 | for (i = 0; i < istop; i++) /* use leftover rp,pp */ |
| 3858 | { |
| 3859 | int a, b, c, pa, pb, pc, p; |
| 3860 | |
| 3861 | a = *lp++; |
| 3862 | b = *pp++; |
| 3863 | c = *cp++; |
| 3864 | |
| 3865 | p = b - c; |
| 3866 | pc = a - c; |
| 3867 | |
| 3868 | #ifdef PNG_USE_ABS |
| 3869 | pa = abs(p); |
| 3870 | pb = abs(pc); |
| 3871 | pc = abs(p + pc); |
| 3872 | #else |
| 3873 | pa = p < 0 ? -p : p; |
| 3874 | pb = pc < 0 ? -pc : pc; |
| 3875 | pc = (p + pc) < 0 ? -(p + pc) : p + pc; |
| 3876 | #endif |
| 3877 | |
| 3878 | /* |
| 3879 | if (pa <= pb && pa <= pc) |
| 3880 | p = a; |
| 3881 | else if (pb <= pc) |
| 3882 | p = b; |
| 3883 | else |
| 3884 | p = c; |
| 3885 | */ |
| 3886 | |
| 3887 | p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; |
| 3888 | |
| 3889 | *rp = (png_byte)(((int)(*rp) + p) & 0xff); |
| 3890 | rp++; |
| 3891 | } |
| 3892 | } |
| 3893 | break; |
| 3894 | } |
| 3895 | |
| 3896 | default: |
| 3897 | png_warning(png_ptr, "Ignoring bad row filter type"); |
| 3898 | *row=0; |
| 3899 | break; |
| 3900 | } |
| 3901 | } |
| 3902 | |
| 3903 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGVCRD */ |