Unused signals in Modelsim

[ALuPin]

Hi newsgroup users,

maybe you can help me on the following question:

Does Modelsim remove registered signals which are unused or not
connected to output pins?
Is there a possibility to avoid this without using output pins?

Kind regards

 

[jtw]

Modelsim does not remove undriven/unused signals; a synthesis tool, however,
is likely to.

JTW
"ALuPin" <ALuPin@web.de> wrote in message
news:b8a9a7b0.0406220109.67a062ac@posting.google.com...

Hi newsgroup users,

maybe you can help me on the following question:

Does Modelsim remove registered signals which are unused or not
connected to output pins?
Is there a possibility to avoid this without using output pins?

Kind regards

 

[Jon Beniston]

ALuPin@web.de (ALuPin) wrote in message news:<b8a9a7b0.0406220109.67a062ac@posting.google.com>...

Hi newsgroup users,

maybe you can help me on the following question:

Does Modelsim remove registered signals which are unused or not
connected to output pins?

It doesn't for the standard level of optimisation. If you enable
-O5/-fast then it may well do.

Is there a possibility to avoid this without using output pins?

You can either compile with the default optimisation level, or use an
option like +acc to make sure it retains a particular net/register.

Kind regards

Cheers,
JonB