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inline unsigned __int64 GetCycleCount()
{
 __asm RDTSC
}
»ò
inline unsigned __int64 GetCycleCount()
{
 __asm _emit 0x0F
 __asm _emit 0x31
}

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Delphi(Pascal) code:
function StrLen(const Str: PChar): Cardinal; assembler;
asm
MOV EDX,EDI
MOV EDI,EAX
MOV ECX,0FFFFFFFFH
XOR AL,AL
REPNE SCASB
MOV EAX,0FFFFFFFEH
SUB EAX,ECX
MOV EDI,EDX
end;



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