Re: [Qemu-devel] Support for Wireless MMX

["Luca Piccarreta" <piccarre@elet.polimi.it>]

Hi Paul, hi all,
I really hoped iwmmxt would do it into any emulator...
The latest version of GDB supports Wireless MMX, or at
least I used to think so, because I did not make any hacking to
compile it :), but using GDB requires ELF toolchains, and I simply
don't like the idea of having two separate toolchains, one
for simulation, the other for releases!
For what concerns System emulation I actually didn't even think
about it...
Thanks anyway for the effort,
Luca

----- Original Message ----- 
From: "Paul Brook" <paul@codesourcery.com>
To: <qemu-devel@nongnu.org>
Cc: "Luca Piccarreta" <piccarre@elet.polimi.it>
Sent: Friday, March 18, 2005 2:00 PM
Subject: Re: [Qemu-devel] Support for Wireless MMX


> On Friday 18 March 2005 10:53, Luca Piccarreta wrote:
> > Hi all,
> > after googling a lot I concluded (hopefully) that qemu is
> > the only freely available solution for linux cross-toolchain
> > (one armv5 and one iwmmxt toolchain).
>
> The gdb simulator supports both armv5te and iwmmxt, though a small amount
of
> hacking may be required to enable iwmmxt properly.
>
> > I might have made some mistakes, but it looks like there
> > are still some problems with saturated operations (qadd)
> > and support for Wireless MMX is lacking.
> > Am I correct?
>
> iWMMXt is not implemented.
>
> Saturated operations should work, though I probably haven't tested them.
If
> you have examples that don't work, please let me/us know.
>
> > Programs compiled by the armv5 toolchain seem to work
> > correctly except for saturated operations, while programs
> > compiled by the iwmmxt toolchain work only when no
> > Wireless MMX is used and when normal ARMV5 shared
> > libraries are used.
> > Are both features in the future development plans?
> > I saw Paul Brook post a lot of patches about ARM, so
> > I'm quite confident...
>
> I've no immediate interest in iWMMXt.
>
> I do plan on adding support for newer arm architecture revisions, ie.
armv6
> and future revisions once they're public.
>
> System emulation would be nice, but that's definitely a secondary priority
for
> me. It probably won''t happen until after armv6 is done because armv6
> standardises a lot of the MMU and system coprocessor design.
>
> Paul