Re: gEDA-user: Open VHDL Simulators?

[Attila Kinali <attila@xxxxxxxxx>]

On Sat, 26 Apr 2008 09:22:17 +0200
Hagen SANKOWSKI <hsank@xxxxxxxxxxxxxxxxxxxx> wrote:


> As a freelancer now 10 years in business I work nearly on a every day  
> basis with *both* languages, Verilog HDL and VHDL. In general, I see  
> two trends.
> First, the serious and bigger the SoC design, the often companies  
> probably use Verilog instead of VHDL. So the offer with language  
> knowledge for Verilog or VHDL is even a good indication of ambitions.
> Second, with SystemVerilog and all the released sources for the Sparcs  
> and PowerPC the Verilog camp overruns the more european and academic  
> design villages. For me the development of VHDL slows down in general  
> while SystemVerilog eats the market for dedicated Verification  
> languages.

Where do you work? Because here in Europe, companies still
use mostly VHDL. Verilog skils don't go very far.
 
> Mostly bad VHDL design goes to FPGA, good Verilog design goes to ASICs.

Uhm... I don't think i have to comment on something uneducated
like this, do i?

> So please Steve, keep your attention on Verilog, 'a cobbler should  
> stick to his last'. And, btw. you did a great job with icarus :-)  
> Thanks! If you want support VHDL, than be aware that the VHDL language  
> is more hugh than Verilog with even millions of pitfalls and ways to  
> describe one behavior.

Eh.. VHDL is huge, yes (actually the largest language i know),
but at least it has a clean design, compared to Verilog which
looks like someone tried to hammer C into a form that it
can simulate hardware too.

In number of pitfalls and ambiguities, i think Verilog is worse.
Especialy if you consider that certain Verilog constructs differ
only in one character, but have very sublte different meanings.
A very good way for hard to trace down typos.

> ghdl and freehdl are light years away from quality of icarus.

Yet, i got ghdl running and simulating within minutes while it
took me half a day to figure out why icarus wasn't.

But yes, ghdl and freehdl are far a away from being feature complete,
though i don't think that was the question here.


			Attila Kinali

-- 
Praised are the Fountains of Shelieth, the silver harp of the waters,
But blest in my name forever this stream that stanched my thirst!
                         -- Deed of Morred


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