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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: RFC: booleans and the kernel
Date: 24 Jan 2002 14:05:01 -0800
Organization: Transmeta Corporation, Santa Clara CA
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In-Reply-To: <Pine.LNX.4.44.0201241433110.2839-100000@waste.org> <Pine.LNX.3.95.1020124165419.1859A-100000@chaos.analogic.com>
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Followup to:  <Pine.LNX.3.95.1020124165419.1859A-100000@chaos.analogic.com>
By author:    "Richard B. Johnson" <root@chaos.analogic.com>
In newsgroup: linux.dev.kernel
> 
> Don't you wish!
> 
> 	cmpl $0,8(%ebp)      <-------------- Compare against zero.

That's the fastest way in x86 to compare a memory variable against
zero.  andl %reg,%reg only works if the value is already in a
register.

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
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