1 ;/* inffas32.asm is a hand tuned assembler version of inffast.c -- fast decoding 2 ; * 3 ; * inffas32.asm is derivated from inffas86.c, with translation of assembly code 4 ; * 5 ; * Copyright (C) 1995-2003 Mark Adler 6 ; * For conditions of distribution and use, see copyright notice in zlib.h 7 ; * 8 ; * Copyright (C) 2003 Chris Anderson <christop (a] charm.net> 9 ; * Please use the copyright conditions above. 10 ; * 11 ; * Mar-13-2003 -- Most of this is derived from inffast.S which is derived from 12 ; * the gcc -S output of zlib-1.2.0/inffast.c. Zlib-1.2.0 is in beta release at 13 ; * the moment. I have successfully compiled and tested this code with gcc2.96, 14 ; * gcc3.2, icc5.0, msvc6.0. It is very close to the speed of inffast.S 15 ; * compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX 16 ; * enabled. I will attempt to merge the MMX code into this version. Newer 17 ; * versions of this and inffast.S can be found at 18 ; * http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/ 19 ; * 20 ; * 2005 : modification by Gilles Vollant 21 ; */ 22 ; For Visual C++ 4.x and higher and ML 6.x and higher 23 ; ml.exe is in directory \MASM611C of Win95 DDK 24 ; ml.exe is also distributed in http://www.masm32.com/masmdl.htm 25 ; and in VC++2003 toolkit at http://msdn.microsoft.com/visualc/vctoolkit2003/ 26 ; 27 ; 28 ; compile with command line option 29 ; ml /coff /Zi /c /Flinffas32.lst inffas32.asm 30 31 ; if you define NO_GZIP (see inflate.h), compile with 32 ; ml /coff /Zi /c /Flinffas32.lst /DNO_GUNZIP inffas32.asm 33 34 35 ; zlib122sup is 0 fort zlib 1.2.2.1 and lower 36 ; zlib122sup is 8 fort zlib 1.2.2.2 and more (with addition of dmax and head 37 ; in inflate_state in inflate.h) 38 zlib1222sup equ 8 39 40 41 IFDEF GUNZIP 42 INFLATE_MODE_TYPE equ 11 43 INFLATE_MODE_BAD equ 26 44 ELSE 45 IFNDEF NO_GUNZIP 46 INFLATE_MODE_TYPE equ 11 47 INFLATE_MODE_BAD equ 26 48 ELSE 49 INFLATE_MODE_TYPE equ 3 50 INFLATE_MODE_BAD equ 17 51 ENDIF 52 ENDIF 53 54 55 ; 75 "inffast.S" 56 ;FILE "inffast.S" 57 58 ;;;GLOBAL _inflate_fast 59 60 ;;;SECTION .text 61 62 63 64 .586p 65 .mmx 66 67 name inflate_fast_x86 68 .MODEL FLAT 69 70 _DATA segment 71 inflate_fast_use_mmx: 72 dd 1 73 74 75 _TEXT segment 76 PUBLIC _inflate_fast 77 78 ALIGN 4 79 _inflate_fast: 80 jmp inflate_fast_entry 81 82 83 84 ALIGN 4 85 db 'Fast decoding Code from Chris Anderson' 86 db 0 87 88 ALIGN 4 89 invalid_literal_length_code_msg: 90 db 'invalid literal/length code' 91 db 0 92 93 ALIGN 4 94 invalid_distance_code_msg: 95 db 'invalid distance code' 96 db 0 97 98 ALIGN 4 99 invalid_distance_too_far_msg: 100 db 'invalid distance too far back' 101 db 0 102 103 104 ALIGN 4 105 inflate_fast_mask: 106 dd 0 107 dd 1 108 dd 3 109 dd 7 110 dd 15 111 dd 31 112 dd 63 113 dd 127 114 dd 255 115 dd 511 116 dd 1023 117 dd 2047 118 dd 4095 119 dd 8191 120 dd 16383 121 dd 32767 122 dd 65535 123 dd 131071 124 dd 262143 125 dd 524287 126 dd 1048575 127 dd 2097151 128 dd 4194303 129 dd 8388607 130 dd 16777215 131 dd 33554431 132 dd 67108863 133 dd 134217727 134 dd 268435455 135 dd 536870911 136 dd 1073741823 137 dd 2147483647 138 dd 4294967295 139 140 141 mode_state equ 0 ;/* state->mode */ 142 wsize_state equ (32+zlib1222sup) ;/* state->wsize */ 143 write_state equ (36+4+zlib1222sup) ;/* state->write */ 144 window_state equ (40+4+zlib1222sup) ;/* state->window */ 145 hold_state equ (44+4+zlib1222sup) ;/* state->hold */ 146 bits_state equ (48+4+zlib1222sup) ;/* state->bits */ 147 lencode_state equ (64+4+zlib1222sup) ;/* state->lencode */ 148 distcode_state equ (68+4+zlib1222sup) ;/* state->distcode */ 149 lenbits_state equ (72+4+zlib1222sup) ;/* state->lenbits */ 150 distbits_state equ (76+4+zlib1222sup) ;/* state->distbits */ 151 152 153 ;;SECTION .text 154 ; 205 "inffast.S" 155 ;GLOBAL inflate_fast_use_mmx 156 157 ;SECTION .data 158 159 160 ; GLOBAL inflate_fast_use_mmx:object 161 ;.size inflate_fast_use_mmx, 4 162 ; 226 "inffast.S" 163 ;SECTION .text 164 165 ALIGN 4 166 inflate_fast_entry: 167 push edi 168 push esi 169 push ebp 170 push ebx 171 pushfd 172 sub esp,64 173 cld 174 175 176 177 178 mov esi, [esp+88] 179 mov edi, [esi+28] 180 181 182 183 184 185 186 187 mov edx, [esi+4] 188 mov eax, [esi+0] 189 190 add edx,eax 191 sub edx,11 192 193 mov [esp+44],eax 194 mov [esp+20],edx 195 196 mov ebp, [esp+92] 197 mov ecx, [esi+16] 198 mov ebx, [esi+12] 199 200 sub ebp,ecx 201 neg ebp 202 add ebp,ebx 203 204 sub ecx,257 205 add ecx,ebx 206 207 mov [esp+60],ebx 208 mov [esp+40],ebp 209 mov [esp+16],ecx 210 ; 285 "inffast.S" 211 mov eax, [edi+lencode_state] 212 mov ecx, [edi+distcode_state] 213 214 mov [esp+8],eax 215 mov [esp+12],ecx 216 217 mov eax,1 218 mov ecx, [edi+lenbits_state] 219 shl eax,cl 220 dec eax 221 mov [esp+0],eax 222 223 mov eax,1 224 mov ecx, [edi+distbits_state] 225 shl eax,cl 226 dec eax 227 mov [esp+4],eax 228 229 mov eax, [edi+wsize_state] 230 mov ecx, [edi+write_state] 231 mov edx, [edi+window_state] 232 233 mov [esp+52],eax 234 mov [esp+48],ecx 235 mov [esp+56],edx 236 237 mov ebp, [edi+hold_state] 238 mov ebx, [edi+bits_state] 239 ; 321 "inffast.S" 240 mov esi, [esp+44] 241 mov ecx, [esp+20] 242 cmp ecx,esi 243 ja L_align_long 244 245 add ecx,11 246 sub ecx,esi 247 mov eax,12 248 sub eax,ecx 249 lea edi, [esp+28] 250 rep movsb 251 mov ecx,eax 252 xor eax,eax 253 rep stosb 254 lea esi, [esp+28] 255 mov [esp+20],esi 256 jmp L_is_aligned 257 258 259 L_align_long: 260 test esi,3 261 jz L_is_aligned 262 xor eax,eax 263 mov al, [esi] 264 inc esi 265 mov ecx,ebx 266 add ebx,8 267 shl eax,cl 268 or ebp,eax 269 jmp L_align_long 270 271 L_is_aligned: 272 mov edi, [esp+60] 273 ; 366 "inffast.S" 274 L_check_mmx: 275 cmp dword ptr [inflate_fast_use_mmx],2 276 je L_init_mmx 277 ja L_do_loop 278 279 push eax 280 push ebx 281 push ecx 282 push edx 283 pushfd 284 mov eax, [esp] 285 xor dword ptr [esp],0200000h 286 287 288 289 290 popfd 291 pushfd 292 pop edx 293 xor edx,eax 294 jz L_dont_use_mmx 295 xor eax,eax 296 cpuid 297 cmp ebx,0756e6547h 298 jne L_dont_use_mmx 299 cmp ecx,06c65746eh 300 jne L_dont_use_mmx 301 cmp edx,049656e69h 302 jne L_dont_use_mmx 303 mov eax,1 304 cpuid 305 shr eax,8 306 and eax,15 307 cmp eax,6 308 jne L_dont_use_mmx 309 test edx,0800000h 310 jnz L_use_mmx 311 jmp L_dont_use_mmx 312 L_use_mmx: 313 mov dword ptr [inflate_fast_use_mmx],2 314 jmp L_check_mmx_pop 315 L_dont_use_mmx: 316 mov dword ptr [inflate_fast_use_mmx],3 317 L_check_mmx_pop: 318 pop edx 319 pop ecx 320 pop ebx 321 pop eax 322 jmp L_check_mmx 323 ; 426 "inffast.S" 324 ALIGN 4 325 L_do_loop: 326 ; 437 "inffast.S" 327 cmp bl,15 328 ja L_get_length_code 329 330 xor eax,eax 331 lodsw 332 mov cl,bl 333 add bl,16 334 shl eax,cl 335 or ebp,eax 336 337 L_get_length_code: 338 mov edx, [esp+0] 339 mov ecx, [esp+8] 340 and edx,ebp 341 mov eax, [ecx+edx*4] 342 343 L_dolen: 344 345 346 347 348 349 350 mov cl,ah 351 sub bl,ah 352 shr ebp,cl 353 354 355 356 357 358 359 test al,al 360 jnz L_test_for_length_base 361 362 shr eax,16 363 stosb 364 365 L_while_test: 366 367 368 cmp [esp+16],edi 369 jbe L_break_loop 370 371 cmp [esp+20],esi 372 ja L_do_loop 373 jmp L_break_loop 374 375 L_test_for_length_base: 376 ; 502 "inffast.S" 377 mov edx,eax 378 shr edx,16 379 mov cl,al 380 381 test al,16 382 jz L_test_for_second_level_length 383 and cl,15 384 jz L_save_len 385 cmp bl,cl 386 jae L_add_bits_to_len 387 388 mov ch,cl 389 xor eax,eax 390 lodsw 391 mov cl,bl 392 add bl,16 393 shl eax,cl 394 or ebp,eax 395 mov cl,ch 396 397 L_add_bits_to_len: 398 mov eax,1 399 shl eax,cl 400 dec eax 401 sub bl,cl 402 and eax,ebp 403 shr ebp,cl 404 add edx,eax 405 406 L_save_len: 407 mov [esp+24],edx 408 409 410 L_decode_distance: 411 ; 549 "inffast.S" 412 cmp bl,15 413 ja L_get_distance_code 414 415 xor eax,eax 416 lodsw 417 mov cl,bl 418 add bl,16 419 shl eax,cl 420 or ebp,eax 421 422 L_get_distance_code: 423 mov edx, [esp+4] 424 mov ecx, [esp+12] 425 and edx,ebp 426 mov eax, [ecx+edx*4] 427 428 429 L_dodist: 430 mov edx,eax 431 shr edx,16 432 mov cl,ah 433 sub bl,ah 434 shr ebp,cl 435 ; 584 "inffast.S" 436 mov cl,al 437 438 test al,16 439 jz L_test_for_second_level_dist 440 and cl,15 441 jz L_check_dist_one 442 cmp bl,cl 443 jae L_add_bits_to_dist 444 445 mov ch,cl 446 xor eax,eax 447 lodsw 448 mov cl,bl 449 add bl,16 450 shl eax,cl 451 or ebp,eax 452 mov cl,ch 453 454 L_add_bits_to_dist: 455 mov eax,1 456 shl eax,cl 457 dec eax 458 sub bl,cl 459 and eax,ebp 460 shr ebp,cl 461 add edx,eax 462 jmp L_check_window 463 464 L_check_window: 465 ; 625 "inffast.S" 466 mov [esp+44],esi 467 mov eax,edi 468 sub eax, [esp+40] 469 470 cmp eax,edx 471 jb L_clip_window 472 473 mov ecx, [esp+24] 474 mov esi,edi 475 sub esi,edx 476 477 sub ecx,3 478 mov al, [esi] 479 mov [edi],al 480 mov al, [esi+1] 481 mov dl, [esi+2] 482 add esi,3 483 mov [edi+1],al 484 mov [edi+2],dl 485 add edi,3 486 rep movsb 487 488 mov esi, [esp+44] 489 jmp L_while_test 490 491 ALIGN 4 492 L_check_dist_one: 493 cmp edx,1 494 jne L_check_window 495 cmp [esp+40],edi 496 je L_check_window 497 498 dec edi 499 mov ecx, [esp+24] 500 mov al, [edi] 501 sub ecx,3 502 503 mov [edi+1],al 504 mov [edi+2],al 505 mov [edi+3],al 506 add edi,4 507 rep stosb 508 509 jmp L_while_test 510 511 ALIGN 4 512 L_test_for_second_level_length: 513 514 515 516 517 test al,64 518 jnz L_test_for_end_of_block 519 520 mov eax,1 521 shl eax,cl 522 dec eax 523 and eax,ebp 524 add eax,edx 525 mov edx, [esp+8] 526 mov eax, [edx+eax*4] 527 jmp L_dolen 528 529 ALIGN 4 530 L_test_for_second_level_dist: 531 532 533 534 535 test al,64 536 jnz L_invalid_distance_code 537 538 mov eax,1 539 shl eax,cl 540 dec eax 541 and eax,ebp 542 add eax,edx 543 mov edx, [esp+12] 544 mov eax, [edx+eax*4] 545 jmp L_dodist 546 547 ALIGN 4 548 L_clip_window: 549 ; 721 "inffast.S" 550 mov ecx,eax 551 mov eax, [esp+52] 552 neg ecx 553 mov esi, [esp+56] 554 555 cmp eax,edx 556 jb L_invalid_distance_too_far 557 558 add ecx,edx 559 cmp dword ptr [esp+48],0 560 jne L_wrap_around_window 561 562 sub eax,ecx 563 add esi,eax 564 ; 749 "inffast.S" 565 mov eax, [esp+24] 566 cmp eax,ecx 567 jbe L_do_copy1 568 569 sub eax,ecx 570 rep movsb 571 mov esi,edi 572 sub esi,edx 573 jmp L_do_copy1 574 575 cmp eax,ecx 576 jbe L_do_copy1 577 578 sub eax,ecx 579 rep movsb 580 mov esi,edi 581 sub esi,edx 582 jmp L_do_copy1 583 584 L_wrap_around_window: 585 ; 793 "inffast.S" 586 mov eax, [esp+48] 587 cmp ecx,eax 588 jbe L_contiguous_in_window 589 590 add esi, [esp+52] 591 add esi,eax 592 sub esi,ecx 593 sub ecx,eax 594 595 596 mov eax, [esp+24] 597 cmp eax,ecx 598 jbe L_do_copy1 599 600 sub eax,ecx 601 rep movsb 602 mov esi, [esp+56] 603 mov ecx, [esp+48] 604 cmp eax,ecx 605 jbe L_do_copy1 606 607 sub eax,ecx 608 rep movsb 609 mov esi,edi 610 sub esi,edx 611 jmp L_do_copy1 612 613 L_contiguous_in_window: 614 ; 836 "inffast.S" 615 add esi,eax 616 sub esi,ecx 617 618 619 mov eax, [esp+24] 620 cmp eax,ecx 621 jbe L_do_copy1 622 623 sub eax,ecx 624 rep movsb 625 mov esi,edi 626 sub esi,edx 627 628 L_do_copy1: 629 ; 862 "inffast.S" 630 mov ecx,eax 631 rep movsb 632 633 mov esi, [esp+44] 634 jmp L_while_test 635 ; 878 "inffast.S" 636 ALIGN 4 637 L_init_mmx: 638 emms 639 640 641 642 643 644 movd mm0,ebp 645 mov ebp,ebx 646 ; 896 "inffast.S" 647 movd mm4,dword ptr [esp+0] 648 movq mm3,mm4 649 movd mm5,dword ptr [esp+4] 650 movq mm2,mm5 651 pxor mm1,mm1 652 mov ebx, [esp+8] 653 jmp L_do_loop_mmx 654 655 ALIGN 4 656 L_do_loop_mmx: 657 psrlq mm0,mm1 658 659 cmp ebp,32 660 ja L_get_length_code_mmx 661 662 movd mm6,ebp 663 movd mm7,dword ptr [esi] 664 add esi,4 665 psllq mm7,mm6 666 add ebp,32 667 por mm0,mm7 668 669 L_get_length_code_mmx: 670 pand mm4,mm0 671 movd eax,mm4 672 movq mm4,mm3 673 mov eax, [ebx+eax*4] 674 675 L_dolen_mmx: 676 movzx ecx,ah 677 movd mm1,ecx 678 sub ebp,ecx 679 680 test al,al 681 jnz L_test_for_length_base_mmx 682 683 shr eax,16 684 stosb 685 686 L_while_test_mmx: 687 688 689 cmp [esp+16],edi 690 jbe L_break_loop 691 692 cmp [esp+20],esi 693 ja L_do_loop_mmx 694 jmp L_break_loop 695 696 L_test_for_length_base_mmx: 697 698 mov edx,eax 699 shr edx,16 700 701 test al,16 702 jz L_test_for_second_level_length_mmx 703 and eax,15 704 jz L_decode_distance_mmx 705 706 psrlq mm0,mm1 707 movd mm1,eax 708 movd ecx,mm0 709 sub ebp,eax 710 and ecx, [inflate_fast_mask+eax*4] 711 add edx,ecx 712 713 L_decode_distance_mmx: 714 psrlq mm0,mm1 715 716 cmp ebp,32 717 ja L_get_dist_code_mmx 718 719 movd mm6,ebp 720 movd mm7,dword ptr [esi] 721 add esi,4 722 psllq mm7,mm6 723 add ebp,32 724 por mm0,mm7 725 726 L_get_dist_code_mmx: 727 mov ebx, [esp+12] 728 pand mm5,mm0 729 movd eax,mm5 730 movq mm5,mm2 731 mov eax, [ebx+eax*4] 732 733 L_dodist_mmx: 734 735 movzx ecx,ah 736 mov ebx,eax 737 shr ebx,16 738 sub ebp,ecx 739 movd mm1,ecx 740 741 test al,16 742 jz L_test_for_second_level_dist_mmx 743 and eax,15 744 jz L_check_dist_one_mmx 745 746 L_add_bits_to_dist_mmx: 747 psrlq mm0,mm1 748 movd mm1,eax 749 movd ecx,mm0 750 sub ebp,eax 751 and ecx, [inflate_fast_mask+eax*4] 752 add ebx,ecx 753 754 L_check_window_mmx: 755 mov [esp+44],esi 756 mov eax,edi 757 sub eax, [esp+40] 758 759 cmp eax,ebx 760 jb L_clip_window_mmx 761 762 mov ecx,edx 763 mov esi,edi 764 sub esi,ebx 765 766 sub ecx,3 767 mov al, [esi] 768 mov [edi],al 769 mov al, [esi+1] 770 mov dl, [esi+2] 771 add esi,3 772 mov [edi+1],al 773 mov [edi+2],dl 774 add edi,3 775 rep movsb 776 777 mov esi, [esp+44] 778 mov ebx, [esp+8] 779 jmp L_while_test_mmx 780 781 ALIGN 4 782 L_check_dist_one_mmx: 783 cmp ebx,1 784 jne L_check_window_mmx 785 cmp [esp+40],edi 786 je L_check_window_mmx 787 788 dec edi 789 mov ecx,edx 790 mov al, [edi] 791 sub ecx,3 792 793 mov [edi+1],al 794 mov [edi+2],al 795 mov [edi+3],al 796 add edi,4 797 rep stosb 798 799 mov ebx, [esp+8] 800 jmp L_while_test_mmx 801 802 ALIGN 4 803 L_test_for_second_level_length_mmx: 804 test al,64 805 jnz L_test_for_end_of_block 806 807 and eax,15 808 psrlq mm0,mm1 809 movd ecx,mm0 810 and ecx, [inflate_fast_mask+eax*4] 811 add ecx,edx 812 mov eax, [ebx+ecx*4] 813 jmp L_dolen_mmx 814 815 ALIGN 4 816 L_test_for_second_level_dist_mmx: 817 test al,64 818 jnz L_invalid_distance_code 819 820 and eax,15 821 psrlq mm0,mm1 822 movd ecx,mm0 823 and ecx, [inflate_fast_mask+eax*4] 824 mov eax, [esp+12] 825 add ecx,ebx 826 mov eax, [eax+ecx*4] 827 jmp L_dodist_mmx 828 829 ALIGN 4 830 L_clip_window_mmx: 831 832 mov ecx,eax 833 mov eax, [esp+52] 834 neg ecx 835 mov esi, [esp+56] 836 837 cmp eax,ebx 838 jb L_invalid_distance_too_far 839 840 add ecx,ebx 841 cmp dword ptr [esp+48],0 842 jne L_wrap_around_window_mmx 843 844 sub eax,ecx 845 add esi,eax 846 847 cmp edx,ecx 848 jbe L_do_copy1_mmx 849 850 sub edx,ecx 851 rep movsb 852 mov esi,edi 853 sub esi,ebx 854 jmp L_do_copy1_mmx 855 856 cmp edx,ecx 857 jbe L_do_copy1_mmx 858 859 sub edx,ecx 860 rep movsb 861 mov esi,edi 862 sub esi,ebx 863 jmp L_do_copy1_mmx 864 865 L_wrap_around_window_mmx: 866 867 mov eax, [esp+48] 868 cmp ecx,eax 869 jbe L_contiguous_in_window_mmx 870 871 add esi, [esp+52] 872 add esi,eax 873 sub esi,ecx 874 sub ecx,eax 875 876 877 cmp edx,ecx 878 jbe L_do_copy1_mmx 879 880 sub edx,ecx 881 rep movsb 882 mov esi, [esp+56] 883 mov ecx, [esp+48] 884 cmp edx,ecx 885 jbe L_do_copy1_mmx 886 887 sub edx,ecx 888 rep movsb 889 mov esi,edi 890 sub esi,ebx 891 jmp L_do_copy1_mmx 892 893 L_contiguous_in_window_mmx: 894 895 add esi,eax 896 sub esi,ecx 897 898 899 cmp edx,ecx 900 jbe L_do_copy1_mmx 901 902 sub edx,ecx 903 rep movsb 904 mov esi,edi 905 sub esi,ebx 906 907 L_do_copy1_mmx: 908 909 910 mov ecx,edx 911 rep movsb 912 913 mov esi, [esp+44] 914 mov ebx, [esp+8] 915 jmp L_while_test_mmx 916 ; 1174 "inffast.S" 917 L_invalid_distance_code: 918 919 920 921 922 923 mov ecx, invalid_distance_code_msg 924 mov edx,INFLATE_MODE_BAD 925 jmp L_update_stream_state 926 927 L_test_for_end_of_block: 928 929 930 931 932 933 test al,32 934 jz L_invalid_literal_length_code 935 936 mov ecx,0 937 mov edx,INFLATE_MODE_TYPE 938 jmp L_update_stream_state 939 940 L_invalid_literal_length_code: 941 942 943 944 945 946 mov ecx, invalid_literal_length_code_msg 947 mov edx,INFLATE_MODE_BAD 948 jmp L_update_stream_state 949 950 L_invalid_distance_too_far: 951 952 953 954 mov esi, [esp+44] 955 mov ecx, invalid_distance_too_far_msg 956 mov edx,INFLATE_MODE_BAD 957 jmp L_update_stream_state 958 959 L_update_stream_state: 960 961 mov eax, [esp+88] 962 test ecx,ecx 963 jz L_skip_msg 964 mov [eax+24],ecx 965 L_skip_msg: 966 mov eax, [eax+28] 967 mov [eax+mode_state],edx 968 jmp L_break_loop 969 970 ALIGN 4 971 L_break_loop: 972 ; 1243 "inffast.S" 973 cmp dword ptr [inflate_fast_use_mmx],2 974 jne L_update_next_in 975 976 977 978 mov ebx,ebp 979 980 L_update_next_in: 981 ; 1266 "inffast.S" 982 mov eax, [esp+88] 983 mov ecx,ebx 984 mov edx, [eax+28] 985 shr ecx,3 986 sub esi,ecx 987 shl ecx,3 988 sub ebx,ecx 989 mov [eax+12],edi 990 mov [edx+bits_state],ebx 991 mov ecx,ebx 992 993 lea ebx, [esp+28] 994 cmp [esp+20],ebx 995 jne L_buf_not_used 996 997 sub esi,ebx 998 mov ebx, [eax+0] 999 mov [esp+20],ebx 1000 add esi,ebx 1001 mov ebx, [eax+4] 1002 sub ebx,11 1003 add [esp+20],ebx 1004 1005 L_buf_not_used: 1006 mov [eax+0],esi 1007 1008 mov ebx,1 1009 shl ebx,cl 1010 dec ebx 1011 1012 1013 1014 1015 1016 cmp dword ptr [inflate_fast_use_mmx],2 1017 jne L_update_hold 1018 1019 1020 1021 psrlq mm0,mm1 1022 movd ebp,mm0 1023 1024 emms 1025 1026 L_update_hold: 1027 1028 1029 1030 and ebp,ebx 1031 mov [edx+hold_state],ebp 1032 1033 1034 1035 1036 mov ebx, [esp+20] 1037 cmp ebx,esi 1038 jbe L_last_is_smaller 1039 1040 sub ebx,esi 1041 add ebx,11 1042 mov [eax+4],ebx 1043 jmp L_fixup_out 1044 L_last_is_smaller: 1045 sub esi,ebx 1046 neg esi 1047 add esi,11 1048 mov [eax+4],esi 1049 1050 1051 1052 1053 L_fixup_out: 1054 1055 mov ebx, [esp+16] 1056 cmp ebx,edi 1057 jbe L_end_is_smaller 1058 1059 sub ebx,edi 1060 add ebx,257 1061 mov [eax+16],ebx 1062 jmp L_done 1063 L_end_is_smaller: 1064 sub edi,ebx 1065 neg edi 1066 add edi,257 1067 mov [eax+16],edi 1068 1069 1070 1071 1072 1073 L_done: 1074 add esp,64 1075 popfd 1076 pop ebx 1077 pop ebp 1078 pop esi 1079 pop edi 1080 ret 1081 1082 _TEXT ends 1083 end 1084
