From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Daniel Jacobowitz <dan@debian.org>,
Hartvig Ekner <hartvige@mips.com>,
"Kevin D. Kissell" <kevink@mips.com>,
Tor Arntsen <tor@spacetec.no>,
Carsten Langgaard <carstenl@mips.com>,
linux-mips@linux-mips.org
Subject: Re: 64-bit and N32 kernel interfaces
Date: Fri, 6 Sep 2002 11:42:39 +0200 [thread overview]
Message-ID: <20020906114239.B2993@linux-mips.org> (raw)
In-Reply-To: <Pine.GSO.3.96.1020905181042.7444G-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Thu, Sep 05, 2002 at 06:16:49PM +0200
On Thu, Sep 05, 2002 at 06:16:49PM +0200, Maciej W. Rozycki wrote:
> > N32 supports saving and restoring 64-bit registers, which O32 doesn't -
> > according to some comments in GCC, O32 is in fact incompatible with
> > using 64-bit operations.
>
> But that old software wouldn't benefit as it didn't perform 64-bit
> operations unless manually coded in software using narrower data types.
> There is no 64-bit C data type for o32 and long long is quite a recent
> invention -- it didn't exist in the 80s or even early 90s.
Not in any standard but de facto in existence since a long time. Anyway,
the changes in floating point in the N32 are so substancial that there
are projects that say without N32 or N64 they don't even need to start
working on their projects.
Ralf
next prev parent reply other threads:[~2002-09-08 16:13 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-05 9:30 64-bit and N32 kernel interfaces Tor Arntsen
2002-09-05 11:47 ` Maciej W. Rozycki
2002-09-05 12:48 ` Kevin D. Kissell
2002-09-05 12:48 ` Kevin D. Kissell
2002-09-05 14:09 ` Maciej W. Rozycki
2002-09-05 14:20 ` Hartvig Ekner
2002-09-05 14:20 ` Hartvig Ekner
2002-09-05 14:54 ` Maciej W. Rozycki
2002-09-05 14:59 ` Daniel Jacobowitz
2002-09-05 15:10 ` Maciej W. Rozycki
2002-09-05 15:14 ` Daniel Jacobowitz
2002-09-05 16:16 ` Maciej W. Rozycki
2002-09-05 16:19 ` Daniel Jacobowitz
2002-09-05 16:33 ` Maciej W. Rozycki
2002-09-05 16:39 ` Daniel Jacobowitz
2002-09-05 17:16 ` Maciej W. Rozycki
2002-09-05 17:29 ` Kevin D. Kissell
2002-09-05 17:29 ` Kevin D. Kissell
2002-09-05 19:34 ` Maciej W. Rozycki
2002-09-06 9:42 ` Ralf Baechle [this message]
2002-09-05 18:07 ` Hartvig Ekner
2002-09-05 18:07 ` Hartvig Ekner
2002-09-05 18:54 ` Maciej W. Rozycki
2002-09-05 19:16 ` Thiemo Seufer
2002-09-06 9:30 ` Ralf Baechle
2002-09-05 14:22 ` Daniel Jacobowitz
2002-09-05 15:08 ` Maciej W. Rozycki
2002-09-05 15:14 ` Daniel Jacobowitz
2002-09-05 16:28 ` Maciej W. Rozycki
2002-09-05 16:30 ` Thiemo Seufer
2002-09-05 16:54 ` Maciej W. Rozycki
2002-09-05 17:44 ` Thiemo Seufer
2002-09-05 19:50 ` Maciej W. Rozycki
2002-09-05 22:12 ` Thiemo Seufer
2002-09-09 17:39 ` Maciej W. Rozycki
2002-09-06 10:14 ` Ralf Baechle
2002-09-09 14:01 ` Dominic Sweetman
-- strict thread matches above, loose matches on Subject: below --
2002-09-04 13:56 Ralf Baechle
2002-09-04 14:14 ` Maciej W. Rozycki
2002-09-04 14:31 ` Ralf Baechle
2002-09-04 15:19 ` Maciej W. Rozycki
2002-09-04 18:46 ` Ralf Baechle
2002-09-05 9:53 ` Maciej W. Rozycki
2002-09-05 6:40 ` Carsten Langgaard
2002-09-05 9:23 ` Maciej W. Rozycki
2002-09-05 13:41 ` Daniel Jacobowitz
2002-09-04 17:32 ` Jun Sun
2002-09-04 17:56 ` Maciej W. Rozycki
2002-09-04 18:40 ` Ralf Baechle
2002-09-05 10:15 ` Kjeld Borch Egevang
2002-09-05 10:15 ` Kjeld Borch Egevang
2002-09-09 20:20 ` Jay Carlson
2002-09-16 13:01 ` Ralf Baechle
2002-09-16 15:40 ` Ralf Baechle
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