Re: gEDA-user: Google SoC : Potential Candidate seeking Info

[Stephen Williams <steve@xxxxxxxxxx>]

Aanjhan R wrote:
>> On Wednesday 11 February 2009, Stephen Williams wrote:
>>>> Given the apparent bent towards analog in your selection of
>>>> candidate projects, might I suggest you take a look at the
>>>> "gnucap Code Generator" on the Icarus Verilog projects page?
>>>> This is something that Al has been wanting, and also puts to
>>>> use some of the nascent analog support in Icarus Verilog
>>>> proper.
>> I like this one too.  It is an enabler that will make other
>> enhancements easier, and something that is desperately needed
>> as a model compiler.  There are lots of people who want it and
>> some real experts who can help.
> 
> This sounds exciting too. But I am highly unsure about the things that
> I need to learn before taking this project up. The Icarus Project page
> says this project remains clear of the Iverilog core. It states that
> one might require knowledge of how to "compile" models for gnucap. Can
> some more light be thrown here please? Any nice starting pointers? I
> can then catch on and start rolling.

For the Icarus Verilog side...

Icarus Verilog provides an API for writing code generators. This
API is described by the ivl_target.h header file. There are example
code generators specifically intended to demonstrate the API use:
the tgt-null/ directory has a null code generator, and the tgt-stub/
directory has a stub code generator. The null code generator simply
connects to the API and does noting. The stub code generator scans
the entire design, displaying what it finds in human-readable form.

The idea here would be to write a code generator that uses that API
to get at the elaborated Verilog design, then write out source code
for a plugin that can be loaded by gnucap. Al would be better able
to explain his preferred input format.

-- 
Steve Williams                "The woods are lovely, dark and deep.
steve at icarus.com           But I have promises to keep,
http://www.icarus.com         and lines to code before I sleep,
http://www.picturel.com       And lines to code before I sleep."


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