On Jan 4, 2008 8:24 AM, Luc Le Blanc <[EMAIL PROTECTED]> wrote: > I am trying to optimize repeated math operations. If I have > > UInt16 x, y; > > and need to divide x by 100. Is it easier on the CPU to write > > y = x / 100; > > than > > y = x * 0.01; > > I am assuming the former does an integer division, while the latter does a > floating-point multiplication, and that any floating-point operation takes > longer than an integer operation. Am I right?
Yes > Lastly, if I write > > y = x / 100.0; > > will the OS perform a floating-point division because of the 100.0, or will > it perform an integer division because both x and y are integers? The C language defines how math values are transformed. Because the range of a double is greater than an int, x will be converted to a double, the division will be done in FP, then the result will be converted back. -- For information on using the ACCESS Developer Forums, or to unsubscribe, please see http://www.access-company.com/developers/forums/
