Re: FPU, i386

[rpm <rajendra.mishra@timesys.com>]

On Wednesday 17 April 2002 08:10 pm, Jesse Pollard wrote:
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>

> if (int(1/h * 100) == int(5.0 * 100))
>
> will give a "proper" result within two decimal places. This is still
> limited since there are irrational numbers within that range that COULD
> still come out with a wrong answer, but is much less likely to occur.
>
> Exact match of floating point is not possible - 1/h is eleveated to a
> float.
>
> If your 1/h was actually num/h, and num computed by summing .01 100 times
> I suspect the result would also be "wrong".
>

why is exact match of floating point not possible ?
what i understand is if you  do a  " x/y " (where x and y are two integers ) 
division in hardware then you should always get the same value , then why 
can't we compare floating point "==" operation ?
   I understand that in case of inrrational number it will not give a exact 
value ......but division like 1/.2 is not irrational ! and it should always 
come to 5 !
 
rpm