| To: | Daniel Jacobowitz <dan@debian.org> |
|---|---|
| Subject: | Re: 64-bit and N32 kernel interfaces |
| From: | "Maciej W. Rozycki" <macro@ds2.pg.gda.pl> |
| Date: | Thu, 5 Sep 2002 18:16:49 +0200 (MET DST) |
| Cc: | Hartvig Ekner <hartvige@mips.com>, "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 |
| In-reply-to: | <20020905151409.GA25023@nevyn.them.org> |
| Organization: | Technical University of Gdansk |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| Sender: | linux-mips-bounce@linux-mips.org |
On Thu, 5 Sep 2002, Daniel Jacobowitz 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. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available + |
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