Re: [f-cpu] random number generator

["gaetan@xeberon.net" <gaetan@xeberon.net>]

just one question: is it possible to add a kind of rand instruction in 
the f-cpu instruction set?
It could give a "true" random number (integer) between 0 and MAX_INT 
(following SIMD flags)...
I mean, random numbers are a great problem in programming, so it could 
be a good idea to hardwire one generator into the f-cpu...
i don't know if it is possible and if it is useful, but it could be a 
good idea...


Yann Guidon a écrit :

> > > low-entropy data can be used first to check
> > > dumb errors, ie using a very simple polynomial LFSR.
> > > Then the rest (like rounding error behaviour and more
> > > sophisticated stuffs including statistical measures) will
> > > need a high entropy pseudo-random generator.
> >
> > Good for quick testing but the hardware needs to be built first.
>
> it can be "built" if it is coded and Gaetan is doing that, indeed.
hum.. just trying :)

> Concerning the testing time : the issue comes from running
> the "full build and test" script at home whenever a change
> is made on other units. At the end of the development of a particular
> unit, it is possible for someone to run a very long test,
> feeding the design with millions of test patterns.
> The computer could run a few days, just to be sure.
> Others would not be required to do this,
> only to run the test with a few thousands of patterns.
> In fact, it's as simple as a compilation parameter
> that says how much tests should be done, the less the faster.
>
> YG
>
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--

~~ Gaetan ~~
http://www.xeberon.net


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