[P4-dev] Extern objects: examples

Jeferson Santiago da Silva eng.jefersonsantiago at gmail.com
Tue Jul 25 10:37:07 EDT 2017


Hey Hemant,

as far as I know, it was pushed to the repo around 2 months ago. However, I
unaware of any example of arbitrary extern usage so far.

Regards,
Jeferson

2017-07-24 13:31 GMT-04:00 <hemant at mnkcg.com>:

> As of today, does the p4c compiler support externs?
>
>
>
> Thanks,
>
>
>
> Hemant
>
>
>
> *From:* P4-dev [mailto:p4-dev-bounces at lists.p4.org] *On Behalf Of *Antonin
> Bas
> *Sent:* Monday, May 08, 2017 6:36 PM
> *To:* Jeferson Santiago da Silva <eng.jefersonsantiago at gmail.com>
> *Cc:* p4-dev <p4-dev at lists.p4.org>
> *Subject:* Re: [P4-dev] Extern objects: examples
>
>
>
> Hi Jeferson,
>
>
>
> Thanks for sending this to the list. I believe the p4c bmv2 backend ("json
> generator") is undergoing some serious code refactoring at the moment.
> However, support for arbitrary externs is definitely a priority. Since you
> have already written some code for this, it may be a good idea to open a
> pull request in p4lang/p4c. What do you think?
>
>
>
> Thanks,
>
>
>
> Antonin
>
>
>
> On Sun, May 7, 2017 at 5:37 PM, Jeferson Santiago da Silva <
> eng.jefersonsantiago at gmail.com> wrote:
>
> Dear all,
>
> I've seen recently some questions regarding external methods with P4. So I
> decided to share something.
>
> I worked last year with extern methods in the version 1.1, the same one
> that has been deprecated. I modified the json generator and with Antonin's
> support it was pushed to the p4c-bm repo.
>
> In meantime, the P4-16 language and compiler was developed. Lots of extern
> methods are available, but all of them are seen as primitives in the BMv2.
> So, I modified the p4c json generator to test "actual" extern instances
> with the new P4-16 version.
>
> I invite all you that are interested in extern methods to visit my github
> page. There I have implemented externs for both P4-14 (1.1) and P4-16.
>
> https://github.com/engjefersonsantiago/p4-programs
>
> Regards,
>
> Jeferson
>
>
> --
>
> Jeferson Santiago da Silva, M.Sc.
> <http://br.linkedin.com/in/engjefersonsantiago>
>
> Polytechnique Montréal
>
> Ph.D. Candidate in Computer Engineering
> Hardware and Programmable Logic Design Engineer
>
> Phone: +1 (514) 581-1004 <(514)%20581-1004>
>
> Skype: eng.jefersonsantiago
> Montreal/QC - Canada
>
> Lattes CV: http://lattes.cnpq.br/9568850258686622
>
>
> _______________________________________________
> P4-dev mailing list
> P4-dev at lists.p4.org
> http://lists.p4.org/mailman/listinfo/p4-dev_lists.p4.org
>
>
>
>
>
> --
>
> Antonin
>



-- 
Jeferson Santiago da Silva, M.Sc.
<http://br.linkedin.com/in/engjefersonsantiago>
Polytechnique Montréal
Ph.D. Candidate in Computer Engineering
Hardware and Programmable Logic Design Engineer
Phone: +1 (514) 581-1004
Skype: eng.jefersonsantiago
Montreal/QC - Canada
Lattes CV: http://lattes.cnpq.br/9568850258686622
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