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]
Date:	Tue, 27 Feb 2007 01:05:26 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC] div64_64 support


On Feb 26 2007 15:44, Stephen Hemminger wrote:
>> >-		x = (2 * x + (uint32_t) div64_64(a, x*x)) / 3;
>> >+		x = (2 * x + (u32) (a / x*x)) / 3;
>> 
>> Previously there was div64_64(a, x*x) which is equivalent to
>> (a)/(x*x), or just: a/(x^2). But now you do a/x*x, which is
>> equivalent to a*x/x (in the domain of real numbers). Furthermore,
>> a/x*x is a-(a%x), which does not even remotely match a/(x^2).
>> 
>Been there, done that, don't want to repeat it...

I am sorry I don't quite follow.


Jan
-- 
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists