From: Marc Bevand <bevand_m@epita.fr>
To: dean gaudet <dean-list-linux-kernel@arctic.org>
Cc: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>,
linux-kernel@vger.kernel.org
Subject: Re: [rc4-amd64] RC4 optimized for AMD64
Date: Wed, 3 Nov 2004 11:07:29 +0100 [thread overview]
Message-ID: <20041103100729.GA4664@iah.epita.fr> (raw)
In-Reply-To: <Pine.LNX.4.61.0411021049510.6586@twinlark.arctic.org>
dean gaudet wrote:
|
| [...]
| you're asking about spending one byte? one byte extra for code which
| could perform better on more CPUs?
Guys, this does not matter _for now_, because AFAIK nobody has
benchmarked this code on an EM64T P4 CPU.
Obviously, if 'sub $1,X' is proved to be faster than 'dec' on the
Intel CPU, then I will change the code (since both instructions are
equivalent on AMD CPUs).
--
Marc Bevand http://www.epita.fr/~bevand_m
Computer Science School EPITA - System, Network and Security Dept.
prev parent reply other threads:[~2004-11-03 10:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-01 6:57 [rc4-amd64] RC4 optimized for AMD64 Marc Bevand
2004-11-01 7:36 ` James Morris
2004-11-01 12:24 ` Marc Bevand
2004-11-01 20:44 ` dean gaudet
2004-11-01 20:51 ` dean gaudet
2004-11-01 23:01 ` Marc Bevand
[not found] ` <200411020854.21629.vda@port.imtp.ilyichevsk.odessa.ua>
2004-11-02 18:52 ` dean gaudet
2004-11-02 21:45 ` Denis Vlasenko
2004-11-03 10:07 ` Marc Bevand [this message]
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