Re: Re: percent codes for analyses

I dnt hv cpy of sv spec...but only vlogA has idea of
pct codes for fopen..its a little less useful for
opening files for read or append. 
might be better to support string operations (cat) on
string variables and allow some pct codes there.
jonathan @ Isscc
--- owner-verilog-ams@eda.org <kevin@sonicsinc.com>
wrote:
> Geoffrey.Coram wrote:
> > Martin O'Leary wrote:
> >   
> >> * Add percentage codes for analysis that can be
used to uniquely name a
> >> file generated by an analysis.
> >> It a file is not uniquely name, it will be
overwritten if there are
> >> multiple analysis opening, closing and writing to
the file.
> >>     
> >
> > Let's be sure that SV is going to go along with
this; there are
> > only 26 percent codes, and most of them are
already used.  We
> > don't want SV to assign a different meaning.
> >   
> Actually there are lots more than 26 since you could
use uppercase and 
> they don't have to be single character or just a-z.
> 
> > What does this code look like?  If I put
"results_%a" to I get
> > files like "results_dc" "results_ac" ...
> >
> > Or are the names more like the temporary filenames
generated
> > by the C function "tmpnam"?
> >
> > On one hand, it would be nice to know that dc
results are in
> > "results_dc"; on the other, I don't want the
results of the
> > second dc analysis in a single netlist to
overwrite those
> > of the first dc analysis.
> >   
> 
> Maybe we could add (say) %A to indicated the run
number e.g. 
> "results_%a.%A" would be "
> 
>   "results_dc.0","results_dc.1",...
> 
> Alternatively add extra modes for to $fopen for
no-clobber/versions, e.g.:
> 
>   $fopen(results,"wv"); // v => new version (add
.<number> automatically).
> 
> or tell fopen to do a plug expansion on the file
name e.g.:
> 
>   $fopen("results_%a.%A","we",...); // e => expand
plugs in filename.
> 
> - that saves having to create your own strings.
> 
> Kev.
> 
> > Some simulators have names for the analysis, eg
"dc1" in this:
> > dc1 dc start=0 stop=5
> > Will the percent code use this name?  On one hand,
this would
> > give good control to the user; on the other hand,
it may be
> > inappropriate to dictate this for the simulator in
an HDL
> > manual.
> >
> > -Geoffrey
> >
> >
> > Codes used in Verilog 1364-2005:
> > b,c,d,e,f,g,h, ,l,m, ,o, ,s,t,u,v, ,z
> >
> > C uses i,n,p,x in some implementations, though %i
looks
> > to the same as %d; %x is "unsigned hex" in C,
whereas
> > %h is "hex" in Verilog.  Also, %u is "unsigned
decimal"
> > in C, but "unformatted 2-value" in Verilog.  (%p
is for
> > a pointer. %n is strange: printf outputs nothing
but
> > instead stores back into the corresponding
argument the
> > number of characters printed so far.)
> >
> > I don't see any new ones in 1800-2005.  AMS uses
%r.
> >
> > That leaves: a,j,k,q,w,y  %a sure would be nice
for
> > analysis ...
> >
> >   
> 
> -- 
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Jonathan David
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