This code was unobfuscated. (see Listing6.txt)

  0x41D572: 0F31           RDTSC                          
  0x41D574: 50             PUSH     EAX                   
  0x41D575: FE06           INC      BYTE PTR [ESI]        
  0x41D577: 5A             POP      EDX  

  0x41D58A: E800000000     CALL     0x41D58F
  0x41D58F: 832C2418       SUB      DWORD PTR [ESP],0x18
  0x41D593: FF36           PUSH     DWORD PTR [ESI]       
  0x41D595: FF5610         CALL     DWORD PTR [ESI+0x10]  
  0x41D598: 894614         MOV      DWORD PTR [ESI+0x14],EAX
  0x41D59B: EB01           JMP      0x41D59E 
                 
  0x41D7C8: 0F31           RDTSC                          
  0x41D7CA: 2B0424         SUB      EAX,DWORD PTR [ESP]   
  0x41D7CD: 83C404         ADD      ESP,0x4               
  0x41D7D0: 3DFFFFFF00     CMP      EAX,0xFFFFFF          
  0x41D7D5: 0F87D0B8FFFF   JA       0x4190AB  
  0x41D7DB: 56             PUSH     ESI                   
  0x41D7DC: EB05           JMP      0x41D7E3