[PATCH] Improve System z support and add some tuning

[Mike Frysinger]

On Monday, October 03, 2011 18:53:32 Torbjorn Granlund wrote:
> 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 ?

> (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 ?
-mike
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