Date: Mon, 28 Feb 2000 17:54:43 +0100
From: Martin Ockajak <mandos AT hq DOT alert DOT sk>
To: pgcc AT delorie DOT com
Subject: Re: short add stuff
Message-ID: <20000228175443.A5729@hq.alert.sk>
References: <38B426AF DOT 280BF1C0 AT sgi DOT com> <20000224173809 DOT A32390 AT hq DOT alert DOT sk> <38B5C4BF DOT B78AD329 AT neuss DOT netsurf DOT de>
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In-Reply-To: <38B5C4BF.B78AD329@neuss.netsurf.de>; from w.formann@netsurf213.neuss.netsurf.de on Fri, Feb 25, 2000 at 12:54:39AM +0100
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On Fri, Feb 25, 2000 at 12:54:39AM +0100, Wolfgang Formann wrote:
> I wonder if leave is really faster on K6, at least it uses the long
> decoder
> and therefore cannot be paired (I mean decoded in the same cycle with
> any
> other instruction).

Right, it's only indirectly faster.
Leave is excatly as fast as mov plus pop, but leave is only one byte long.
The shorter the code is more cache friendly and so it is slightly faster.

-- 
Martin Ockajak a.k.a. Mandos  <mandos AT hq DOT alert DOT sk>  http://hq.alert.sk/~mandos
"The goal of Computer Science is to build something that will last at
least until we've finished building it."

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