Re: RFC: booleans and the kernel

From: H. Peter Anvin (hpa@zytor.com)
Date: Thu Jan 24 2002 - 17:05:01 EST

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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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Next message: ken: "Re: 2.4.17 multiple Oops and file corruption on I845 MB"
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