[PCB_FORUM] Re: Metric to English - English to Metric

Hi,

> Conversely, 1/10 (0.1) cannot be exactly represented in base 2...

I design ASICs, and I have done a LOT of arithmetic functions in ASICs, and
use decimal points all the time.  All hardware arithmetic functions are done
in base 2.  It's simply a matter of knowing where the decimal point is and
using enough digits.  Yet, it goes on to explain the solution (as I said,
knowing where the decimal point is)...so I fail to see the *real* problem.

As was pointed out, PADS has no problem switching back and forth between the
two unit systems, so I simply don't believe Allegro can't do it as well.  It
seems like this may be a self imposed restriction:

> The real issue is that some numbers can't be represented exactly in the
> standard floating point representation.

Why do they have to use "standard" floating point representation anyway?
Sounds like someone programmed themselves into a corner, and instead fixing
it, they are trying to come up with explanations...instead of solutions.
Sigh.  To me, this is a huge weakness of Allegro.

Regards,

Austin

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