Re: [Iverilog-devel] vec4-stack progress

[Martin W. <mai...@ma...>]

I was somewhat expecting a performance hit (which is why I checked for it!). 
I'll remind you of this

   http://sourceforge.net/p/iverilog/mailman/message/31240085/

which could account for a lot of it.

Martin

Stephen Williams wrote:
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> Woah, that's interesting. (The performance hit, I mean.)
>
> It is true, though, that some of the translation is simplistic,
> and my expectation is that with some optimization I should be
> able to turn that around. For example, I have done NO profiling
> yet. There are a few tests in the ivtest suite that broke, and
> I want to address those first, but then I want to do some profiles
> to really see what's bad. Honestly, I think I can get it faster
> than the existing mode.
>
> On 02/14/2014 12:41 PM, Martin Whitaker wrote:
>> Running the subset of my production tests that Icarus can handle
>> has not exposed any functional bugs. However, selecting a
>> moderately sized test, I'm seeing ~32% increase in run time and
>> ~10% increase in number of vvp instructions. This is too big a
>> performance hit for my liking.
>>
>> Martin
>>
>> Stephen Williams wrote:
>>
>> The vec4-stack branch of Icarus Verilog in the git repository is
>> almost complete. I've been merging in updates to master, so it has
>> been keeping up with other changes.
>>
>> The actual vec4 work is almost complete; there are only a few
>> unusual corner cases that are not working, so I think it is ready
>> for folks to start trying it out. I'm not going to merge it into
>> master until it passes ALL the ivtest tests that master current
>> passes (there are a handful that fail) but it is really close and I
>> would like to get it out there for people to mess with.
>>
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