linux-kernel - Re: [PATCH] x86: generic versions of find_first_(zero

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Message-ID: <alpine.DEB.1.10.0804061320470.7751@twinlark.arctic.org>
Date:	Sun, 6 Apr 2008 13:22:58 -0700 (PDT)
From:	dean gaudet <dean@...tic.org>
To:	Alexander van Heukelum <heukelum@...tmail.fm>
cc:	Alexander van Heukelum <heukelum@...lshack.com>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: generic versions of find_first_(zero_)bit, convert
     i386

On Sun, 6 Apr 2008, Alexander van Heukelum wrote:

> The current generic implementation of ffz is O(lg(n)) already

it's O(lg(n)) time... the operations all depend on each other.

the implementation i pointed to is O(lg(n)) code space... and the time 
depends on how parallel the machine is, they're not dependent on each 
other.

-dean
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