RtlExtendedMagicDivide

LARGE_INTEGER __stdcall RtlExtendedMagicDivide(LARGE_INTEGER Dividend, LARGE_INTEGER MagicDivisor, CCHAR ShiftCount){
  LARGE_INTEGER v3; 
  unsigned __int64 v4; 
  v3 = Dividend;
  if( Dividend.QuadPart < 0 )
    Dividend.QuadPart = -Dividend.QuadPart;
  v4 = (unsigned __int64)(((unsigned __int64)Dividend.QuadPart
                         * (unsigned __int128)(unsigned __int64)MagicDivisor.QuadPart) >> 64) >> ShiftCount;
  if( v3.QuadPart < 0 )
    return(LARGE_INTEGER)-(__int64)v4;
  return(LARGE_INTEGER)v4;
}

Referenced by:

RtlTimeToSecondsSince1970
RtlTimeToSecondsSince1980
TimeToDaysAndFraction