RE: [Linux-ia64] Multimedia Instructions

From: Mattox, Dave <DMattox_at_UNITECH.COM>
Date: 2000-10-21 10:59:02
I figured as much. Its just a shame that some really nice instructions have
such relatively huge penalties associated with them.

Dave

-----Original Message-----
From: linux-ia64-admin@linuxia64.org
[mailto:linux-ia64-admin@linuxia64.org]On Behalf Of Dan Pop
Sent: Friday, October 20, 2000 4:26 PM
To: Mattox, Dave
Cc: 'linux-ia64@linuxia64.org'
Subject: Re: [Linux-ia64] Multimedia Instructions




On Fri, 20 Oct 2000, Mattox, Dave wrote:

> 2. Does anyone know if the 10 clock cycle penalty for a multimedia
> instruction result used in a different instruction type is just a quirk of
> the Itanium Chip or will this most likely be carried into future IA-64
> Chipsets? 

It's certainly an implementation detail of the Itanium, not a property
of the IA64 architecture.  Of course, only some Intel people have an
idea about what the penalty will be in the next implementation.

Dan


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Received on Fri Oct 20 16:59:35 2000

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