Quoting Lionel Sainte Cluque <[EMAIL PROTECTED]>:

Hi,

> Hello,
>
> I am a developper involved in tclspice. Now this project runs, and I focus
> on mixed signal simulation. Xspice is integrated in ngspice now (tclspice is
> only a version of ngspice by now). Xspice presents a software interface that
> permits to add easily "code models".
> Code models are pieces of software that models a subcircuit (tipically, or
> anything else). I would like to find the way to modify ghdl in order to
> compile VHDL code (syntesisable code rather than testbench) as an xspicecode
> model

Bear in mind that GHDL is not a synthetizer.  I don't know if this is important
to you.

> Then a fpga, cpld or the digital part of an ASIC can be instantiated in a
> spice simulation.
>
> I looked carefully at Xspice interface. Now I have to look carefully inside
> GHDL. Is there some information on ghdl implementation? Somes clues? I will
> read the code, but I am not an expert so I am calling for help.

Well, there are no documentations on ghdl internals.  It is organized like
a compiler with the usual passes : lexical, syntaxic, semantic and code
generation.  It also comes with a run time library.

If you have more questions, I will be happy to answer.

Tristan.

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