[PATCH] Improve System z support and add some tuning
tg at gmplib.org
Tue Oct 4 01:21:51 CEST 2011
Mike Frysinger <vapier at gentoo.org> writes:
> Awaiting paperwork, I committed basic s390x support to the mainline
> repository. I could do this work after I got an emulator up and running
> on a system here.
hercules i'm guessing ?
Yep, since networking is notworking in qemu-system-s390x.
> (4) Should we perhaps use 64-bit limbs for the 31-bit ABI, when using a
> 64-bit processor? As far as I understand, this should work, and it
> would run much faster. (This would be akin to the N32 MIPS ABI and
> the HPPA 2.0N ABI.)
the biggest trouble we have in Gentoo with gmp is the automatic tuning it
does. so as long as gmp's decision to pick 31-bit or 31-bit+64-bit is easily
controlled, this shouldn't be a big problem. might have to declare a gmp-
internal ABI name for this mode like 31-64 ?
Yep, something like that. I am not 100% sure this can be done, I am new
to the wondrous world of System 390.
(Perhaps we ought to stop calling GMP's choice of ABI+limbsize for ABI.
We're abusing the term.)
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