Changing the random seed in Xilinx tools

Hi,

I would like to know if there is a away to change the random seed used
by the Xilinx tools ?

I would like to do this in order to compare the results of multiple
place and routes.


Regards

Altaf

Under MAP or PAR properties (right click) change the "Starting Placer
Cost Table (1-100)"

You could also try enabling Multi Pass PAR...

-Brandon

the.gaffar@googlemail.com wrote:
> Hi,
>
> I would like to know if there is a away to change the random seed used
> by the Xilinx tools ?
>
> I would like to do this in order to compare the results of multiple
> place and routes.
> 
> 
> Regards
> 
> Altaf

Brandon Jasionowski wrote:
> Under MAP or PAR properties (right click) change the "Starting Placer
> Cost Table (1-100)"
>
> You could also try enabling Multi Pass PAR...

Multi Pass PAR has problems in several versions of the tools.
Another option is using command-line and the -t option.
par ... -t n ...
where n is the seed.  Then you can have your own multi-pass
batch file that works the same as single pass.

>
> -Brandon
>
> the.gaffar@googlemail.com wrote:
> > Hi,
> >
> > I would like to know if there is a away to change the random seed used
> > by the Xilinx tools ?
> >
> > I would like to do this in order to compare the results of multiple
> > place and routes.
> > 
> > 
> > Regards
> > 
> > Altaf