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Re: 64-bit and N32 kernel interfaces

To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Subject: Re: 64-bit and N32 kernel interfaces
From: Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de>
Date: Thu, 5 Sep 2002 21:16:19 +0200
Cc: Hartvig Ekner <hartvige@mips.com>, Daniel Jacobowitz <dan@debian.org>, "Kevin D. Kissell" <kevink@mips.com>, Tor Arntsen <tor@spacetec.no>, Carsten Langgaard <carstenl@mips.com>, Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org
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Maciej W. Rozycki wrote:
> On Thu, 5 Sep 2002, Hartvig Ekner wrote:
> 
> > The technical benefits of n32 over o32 are:
[snip]
> > * 64-bit datapath of CPU can be utilized with big impact on certain
> >   applications
> 
>  But an old program doesn't make use of them, so it won't normally
> benefit.

An o32 program using compiler synthesized 64 bit integers will
do so when recompiled for n32.


Thiemo

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