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Re: GCC Port (gcc backend) for Microchip PICMicro microcontroller


see:
SDCC compiler for small devices.
http://sdcc.sourceforge.net/
This perhaps is a first point for begin this

Julian NiÃo

----- Original Message -----
From: "Gabriele Caracausi" <gabriele@caracausi.it>
To: <gcc@gnu.org>
Sent: Wednesday, March 08, 2006 12:31 PM
Subject: RE: GCC Port (gcc backend) for Microchip PICMicro microcontroller


> Hi Francois, Colm,
>
> I've read your emails and I'd like to be involved in this project.
>
> As you can read in my past emails in the GCC ML, I've tried two years ago
to create a porting of GCC to PIC 18FXXX.
>
> The project was developed when I was student without a truly and strong
guide in all involved activities.
> My proposal is: I could share the code I've developed but, keep in mind,
that the code should contain some error.
>
> Starting from it, we could continue / modify / correct / improve the
porting all together. What do you think about it ?
>
> Ciao!
> Gabriele.
>
>
>
>
>
>
> -----Original Message-----
> From: FranÐois Poulain [mailto:fpoulain@enib.fr]
> Sent: Monday, March 06, 2006 7:56 PM
> To: Colm O' Flaherty
> Cc: damien.thebault@laposte.net; gcc@gnu.org; tbird-contact@cox.net;
gabriele@caracausi.it; dj@redhat.com; mrs@apple.com;
Kevin.Tucker@Microchip.com; Lmjennings@ra.rockwell.com;
raimund@vmars.tuwien.ac.at; mjv@x64.com; trebor@trebor.org;
vrokas@otenet.gr; alex@monaghan.co.uk; dooms@student.info.ucl.ac.be;
denisc@overta.ru; aph@redhat.com; matz@suse.de; dave@cyclicode.net;
eric.robert@videotron.ca; Svein.Seldal@solidas.com
> Subject: Re: GCC Port (gcc backend) for Microchip PICMicro microcontroller
>
> > Like you, I'm still studying the internals of gcc, but I'm close to
> > being confident enough to start making some changes.
>
> Nice !
>
> Le lundi 06 mars 2006 Ð 17:17 +0000, Colm O' Flaherty a Ðcrit :
> > Francois,
> >
> > There are only 35 instructions in the 14 bit instruction set, and
> > given that, in gcc, the main initial work seems to be in describing
> > the targets instruction set, it might not take much to find out what
> > implementation issues will occur, by just taking to the time to describe
the instructions.
> > For me, the things that I suspect to be issues are:
> >
> > -8 bit ALU
> > -small memory space
> > -limited stack space (8 levels on 16F) -the number of PIC devices
> > (configurations) that would need to be supported (with the various
> > number of banks, and memory configs)
> >
> > Like you, I'm still studying the internals of gcc, but I'm close to
> > being confident enough to start making some changes.
> >
> > Colm
>
>


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