[Top] [All Lists]

Re: 64-bit and N32 kernel interfaces

To: Daniel Jacobowitz <>
Subject: Re: 64-bit and N32 kernel interfaces
From: "Maciej W. Rozycki" <>
Date: Thu, 5 Sep 2002 18:16:49 +0200 (MET DST)
Cc: Hartvig Ekner <>, "Kevin D. Kissell" <>, Tor Arntsen <>, Carsten Langgaard <>, Ralf Baechle <>,
In-reply-to: <>
Organization: Technical University of Gdansk
Original-recipient: rfc822;
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:, PGP key available        +

<Prev in Thread] Current Thread [Next in Thread>