请高手分析一下算法，自己水平太Y。
100104F0 $55 PUSH EBP100104F1 .8BEC MOV EBP,ESP
100104F3 .57 PUSH EDI
100104F4 .56 PUSH ESI
100104F5 .8B75 0C MOV ESI,DWORD PTR SS:
100104F8 .8B4D 10 MOV ECX,DWORD PTR SS:
100104FB .8B7D 08 MOV EDI,DWORD PTR SS:
100104FE .8BC1 MOV EAX,ECX
10010500 .8BD1 MOV EDX,ECX
10010502 .03C6 ADD EAX,ESI
10010504 .3BFE CMP EDI,ESI
10010506 .76 08 JBE SHORT ystzn.10010510
10010508 .3BF8 CMP EDI,EAX
1001050A .0F82 78010000 JB ystzn.10010688
10010510 >F7C7 03000000 TEST EDI,3
10010516 .75 14 JNZ SHORT ystzn.1001052C
10010518 .C1E9 02 SHR ECX,2
1001051B .83E2 03 AND EDX,3
1001051E .83F9 08 CMP ECX,8
10010521 .72 29 JB SHORT ystzn.1001054C
10010523 .F3:A5 REP MOVS DWORD PTR ES:,DWORD PTR DS>
10010525 .FF2495 380601>JMP DWORD PTR DS:
1001052C >8BC7 MOV EAX,EDI
1001052E .BA 03000000 MOV EDX,3
10010533 .83E9 04 SUB ECX,4
10010536 .72 0C JB SHORT ystzn.10010544
10010538 .83E0 03 AND EAX,3
1001053B .03C8 ADD ECX,EAX
1001053D .FF2485 500501>JMP DWORD PTR DS:
10010544 >FF248D 480601>JMP DWORD PTR DS:
1001054B 90 NOP
1001054C >FF248D CC0501>JMP DWORD PTR DS:
10010553 90 DB 90
10010554 .60050110 DD ystzn.10010560 ;分支表 (1-based) 被用于 1001053D
10010558 .8C050110 DD ystzn.1001058C
1001055C .B0050110 DD ystzn.100105B0
10010560 >23D1 AND EDX,ECX
10010562 .8A06 MOV AL,BYTE PTR DS:
10010564 .8807 MOV BYTE PTR DS:,AL
10010566 .8A46 01 MOV AL,BYTE PTR DS:
10010569 .8847 01 MOV BYTE PTR DS:,AL
1001056C .8A46 02 MOV AL,BYTE PTR DS:
1001056F .C1E9 02 SHR ECX,2
10010572 .8847 02 MOV BYTE PTR DS:,AL
10010575 .83C6 03 ADD ESI,3
10010578 .83C7 03 ADD EDI,3
1001057B .83F9 08 CMP ECX,8
1001057E .^ 72 CC JB SHORT ystzn.1001054C
10010580 .F3:A5 REP MOVS DWORD PTR ES:,DWORD PTR DS>
10010582 .FF2495 380601>JMP DWORD PTR DS:
10010589 8D49 00 LEA ECX,DWORD PTR DS:
1001058C >23D1 AND EDX,ECX
1001058E .8A06 MOV AL,BYTE PTR DS:
10010590 .8807 MOV BYTE PTR DS:,AL
10010592 .8A46 01 MOV AL,BYTE PTR DS:
10010595 .C1E9 02 SHR ECX,2
10010598 .8847 01 MOV BYTE PTR DS:,AL
1001059B .83C6 02 ADD ESI,2
1001059E .83C7 02 ADD EDI,2
100105A1 .83F9 08 CMP ECX,8
100105A4 .^ 72 A6 JB SHORT ystzn.1001054C
100105A6 .F3:A5 REP MOVS DWORD PTR ES:,DWORD PTR DS>
100105A8 .FF2495 380601>JMP DWORD PTR DS:
100105AF 90 NOP
100105B0 >23D1 AND EDX,ECX
100105B2 .8A06 MOV AL,BYTE PTR DS:
100105B4 .8807 MOV BYTE PTR DS:,AL
100105B6 .46 INC ESI
100105B7 .C1E9 02 SHR ECX,2
100105BA .47 INC EDI
100105BB .83F9 08 CMP ECX,8
100105BE .^ 72 8C JB SHORT ystzn.1001054C
100105C0 .F3:A5 REP MOVS DWORD PTR ES:,DWORD PTR DS>
100105C2 .FF2495 380601>JMP DWORD PTR DS:
100105C9 8D49 00 LEA ECX,DWORD PTR DS:
100105CC .2F060110 DD ystzn.1001062F ;分支表 被用于 1001054C
100105D0 .1C060110 DD ystzn.1001061C
100105D4 .14060110 DD ystzn.10010614
100105D8 .0C060110 DD ystzn.1001060C
100105DC .04060110 DD ystzn.10010604
100105E0 .FC050110 DD ystzn.100105FC
100105E4 .F4050110 DD ystzn.100105F4
100105E8 .EC050110 DD ystzn.100105EC
100105EC >8B448E E4 MOV EAX,DWORD PTR DS:
100105F0 .89448F E4 MOV DWORD PTR DS:,EAX
100105F4 >8B448E E8 MOV EAX,DWORD PTR DS:
100105F8 .89448F E8 MOV DWORD PTR DS:,EAX
100105FC >8B448E EC MOV EAX,DWORD PTR DS:
10010600 .89448F EC MOV DWORD PTR DS:,EAX
10010604 >8B448E F0 MOV EAX,DWORD PTR DS:
10010608 .89448F F0 MOV DWORD PTR DS:,EAX
1001060C >8B448E F4 MOV EAX,DWORD PTR DS:
10010610 .89448F F4 MOV DWORD PTR DS:,EAX
10010614 >8B448E F8 MOV EAX,DWORD PTR DS:
10010618 .89448F F8 MOV DWORD PTR DS:,EAX
1001061C >8B448E FC MOV EAX,DWORD PTR DS:
10010620 .89448F FC MOV DWORD PTR DS:,EAX
10010624 .8D048D 000000>LEA EAX,DWORD PTR DS:
1001062B .03F0 ADD ESI,EAX
1001062D .03F8 ADD EDI,EAX
1001062F >FF2495 380601>JMP DWORD PTR DS:
10010636 8BFF MOV EDI,EDI
10010638 .48060110 DD ystzn.10010648 ;分支表 被用于 10010582
1001063C .50060110 DD ystzn.10010650
10010640 .5C060110 DD ystzn.1001065C
10010644 .70060110 DD ystzn.10010670
10010648 >8B45 08 MOV EAX,DWORD PTR SS:
1001064B .5E POP ESI
1001064C .5F POP EDI
1001064D .C9 LEAVE
1001064E .C3 RETN
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