linux-kernel - Re: [RFC] div64

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070306140412.GA1470@one.firstfloor.org>
Date:	Tue, 6 Mar 2007 15:04:12 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	David Miller <davem@...emloft.net>
Cc:	shemminger@...ux-foundation.org, andi@...stfloor.org,
	jengelh@...ux01.gwdg.de, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [RFC] div64_64 support II

> The problem with these algorithms that tradoff one or more
> multiplies in order to avoid a divide is that they don't
> give anything and often lose when both multiplies and
> divides are emulated in software.

Actually on rereading this: is there really any Linux port
that emulates multiplies in software? I thought that was only
done on really small microcontrollers or smart cards; but anything
32bit+ that runs Linux should have hardware multiply, shouldn't it?

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/