Public document 20734 (http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/20734.pdf) should help with that.

Marc J. Miller
Open Source Relations Engineer
marc.miller@amd.com
1-800-538-8450 x43325

 -----Original Message-----
From: 	Wojciech Puchar [mailto:wojtek@chylonia.3miasto.net] 
Sent:	Tuesday, February 05, 2002 12:38 PM
To:	Miller, Marc
Cc:	hackers@freebsd.org; freebsd-audit@freebsd.org; netbsd-users@netbsd.org; port-i386@netbsd.org
Subject:	Re: Athlon XP SSE flag not set?  (AMD's response)

>
> - Our website has supported motherboards.
>
> - These motherboards have BIOSes that enable SSE on AthlonXP.
it's strange that BIOS have to do it.
> - The end user should upgrade their BIOS if they have these motherboards.

ask AMD how to enable it - it's probably few lines of assembly that could
be added to NetBSD initialization code