Re: [Gtkwave-users] vcd2fst bug or feature?

[<by...@nc...>]

	OK, r1551 should work.

	-Tony

293:/home/bybell/gtkwave/code/gtkwave3-gtk3> cd ..
294:/home/bybell/gtkwave/code> svn commit
Password: 
Sending gtkwave3/ChangeLog
Sending gtkwave3/src/extload.c
Sending gtkwave3/src/fst.c
Sending gtkwave3-gtk3/ChangeLog
Sending gtkwave3-gtk3/src/extload.c
Sending gtkwave3-gtk3/src/fst.c
Transmitting file data ......
Committed revision 1551.

	-----------------------------------------From: by...@nc...
To: "gtk...@li..."
Cc: 
Sent: Friday January 24 2020 3:04:06PM
Subject: Re: [Gtkwave-users] vcd2fst bug or feature?

	Every signal needs an initial state. I'm sure you dump Z otherwise
how would a user know what it is since it would never change.

	Note that this isn't only with FST file format. FSDB shows the same
thing, so it's a function of gtkwave's internals for the non-VCD
loaders.

	-Tony

	-----------------------------------------From: "Roman Popov" 
To: gtk...@li...
Cc: 
Sent: Friday January 24 2020 1:09:46PM
Subject: Re: [Gtkwave-users] vcd2fst bug or feature?

Thanks!
Yes , my dumper dumps signals only when they change. So uninitialized
signals are not dumped at #0. GtkWave VCD renders them as X. Synopsys
tools render those signals grey.
I don't dump uninitialized signals because it is more efficient.
-Roman
пт, 24 янв. 2020 г. в 08:50, :

	Your dumper didn't dump X on those signals at time zero (for signals
that didn't have non-X values at the end of time #0) like so:

	#0
x!
x"
x#
x%

-Tony

	-----------------------------------------From: "Roman Popov" 
To: gtk...@li... [2]
Cc: 
Sent: Friday January 24 2020 12:11:07AM
Subject: [Gtkwave-users] vcd2fst bug or feature?

Hello,I'm using vcd2fst utility bundled with gtkwave to convert vcd to
fst.I've noticed that 1-bit signals with unknown value become 0 after
conversion.
Is this a bug? Or FST does not support X-value for 1 bit signals?
I've attached example input and output to email.

Thanks,Roman  _______________________________________________
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