From: Scott Wood <scottwood@freescale.com>
To: Kevin Diggs <kevdig@hypersurf.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: cntlzw
Date: Tue, 03 Jun 2008 15:11:10 -0500 [thread overview]
Message-ID: <4845A55E.2030503@freescale.com> (raw)
In-Reply-To: <4845A44D.20404@hypersurf.com>
Kevin Diggs wrote:
> Hi,
>
> x86 has bsf and bsr. PPC has cntlzw which I think is equivalent to
> bsr. Anyone know of a sneaky algorithm to do bsf?
wordsize - 1 - cntlzw(x & ~(x - 1));
-Scott
next prev parent reply other threads:[~2008-06-03 20:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-03 20:06 cntlzw Kevin Diggs
2008-06-03 20:11 ` Scott Wood [this message]
2008-06-06 9:53 ` cntlzw Matt Sealey
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