Re: working with fixed point

[Zdenek Hurak]

Well, I think this will not be as easy as that. Converting the data is one 
step only, but Ravid obviously wants to calculate in fixed point arithmetics 
too.

Considering that the "fixed-point skills" are by far the most expensive 
component in commercial Matlab suite, it can be expected that solution is not 
trivial.

Zdenek Hurak




 


Dne ne 24. srpen 2003 10:08 Per Persson napsal(a):
> How about
> B=7;
> ## Truncation of x to B fractional bits
> x_qt = 2^-B*floor(x*2^B);
> ## Rounding of x to B fractional bits
> x_qr = 2^-B*floor(x*2^B + 0.5);
>
> You'll have to check for range overflow etc. manually.
>
> HTH,
> Per
>
> On Sunday, August 24, 2003, at 11:30 AM, address@hidden wrote:
> > Hi,
> > I want to convert a floating point octave program into fixed point
> > (with
> > about 7 bits representation) - for simulating its behaviour on fpga.
> > How can I do it?
> > Thanks
> > Ravid
>
> -------------------------------------------------------------
> Octave is freely available under the terms of the GNU GPL.
>
> Octave's home on the web:  http://www.octave.org
> How to fund new projects:  http://www.octave.org/funding.html
> Subscription information:  http://www.octave.org/archive.html
> -------------------------------------------------------------

-- 
Zdenek Hurak
Center for Applied Cybernetics, Czech Technical University
Karlovo namesti 13/E, 12135, Prague, Czech Republic
Tel.: +420 224357683, Fax: +420 224616648
E-mail: address@hidden, Web: http://ar.c-a-k.cz/hurak




-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------