Messages in this thread | | | From | Olaf Titz <> | Subject | Re: Alphas and division (was: faster make depend) | Date | 30 Jul 1996 02:14:37 +0200 |
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Matti E Aarnio <mea@mea.cc.utu.fi> wrote: > I was NOT talking about FP operations, rather of INTEGER.
Computing 1/x on an integer unit yields 0 for every abs(x)>2 at least, or am I missing something? You can do such tricks with precomputing b/x for a known b (e.g. 2^16) and dividing that b off later, but that is, strictly speaking, fixed point arithmetic.
> And of reasons, why the lack of integer division instruction > at Alphas is not a bad thing in my opinion.
That's another issue. Yes, a hardware division engine breaks pipelining and the operation is much more rare than multiplication, so the trade-off is completely valid.
olaf -- ___ Olaf.Titz@inka.de or @{stud,informatik}.uni-karlsruhe.de ____ __ o <URL:http://www.inka.de/~bigred/> <IRC:praetorius> __/<_ >> Just as long as the wheels keep on turning round _)>(_)______________ I will live for the groove 'til the sun goes down << ____
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