linux-kernel - Re: [PATCH] Make shr to divide by power of 2

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Message-ID: <87d478i0d7.fsf@basil.nowhere.org>
Date:	Fri, 07 Aug 2009 08:50:12 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Make shr to divide by power of 2

Sergey Senozhatsky <sergey.senozhatsky@...il.com> writes:
>
> Of course, compiler supposed to do something like
> 	add    $0x7,%eax
> 	shr    $0x3,%eax
> instead of div. Should we rely on this?

Yes. We should rely on this. 

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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