linux-kernel - Re: [PATCH 07/10] bitops: Provide compile time HWEIGHT{8,16,32,64}

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Message-ID: <4B6378C9.9000408@zytor.com>
Date:	Fri, 29 Jan 2010 16:09:45 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	John Kacur <jkacur@...hat.com>, eranian@...gle.com,
	fweisbec@...il.com, paulus@...ba.org, mingo@...e.hu,
	davem@...emloft.net, robert.richter@....com,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 07/10] bitops: Provide compile time HWEIGHT{8,16,32,64}

On 01/29/2010 03:05 AM, Peter Zijlstra wrote:
> On Fri, 2010-01-29 at 11:32 +0100, John Kacur wrote:
>>
>> I like it. Maybe provide a comment that this provides the Hamming weight, it
>> took me a second to realize what this was.
> 
> its called _H_weight for crying out loud.
> 

True... although in computer architecture, when talking about bits, I
think you find that the term population count (popcount) is more readily
recognized.

	-hpa
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