can the athlonxp do sse?

locke2053 · Posted: Fri Feb 04, 2005 4:23 am Post subject: can the athlonxp do sse?

When compiling mplayer I got the message:

/usr/lib/portage/bin/ebuild.sh: line 41: [: -eq: unary operator expected
* Your system is sse capable but you don't have it enabled!
* You might be cross compiling (in this case set CROSSCOMPILE to 1 to disable this warning.

I am running an AthlonXP (1.7GHz? It's a 2200+ I think). I thought SSE was an Intel thing. Can I do it, too? Should I enable it in my USE flags?

codergeek42 · Posted: Fri Feb 04, 2005 4:32 am Post subject:

Archangel1 · Veteran Joined: 21 Apr 2004 Posts: 1212 Location: Work

I think the Athlon XP does do SSE, but not SSE2.

-march=athlon-xp should set it for you, although if you don't have it set in USE it might try to build without regardless.
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What are you, stupid?

tuxamd · Apprentice Joined: 28 Jan 2005 Posts: 281

What is sse? Is it a feature worth using? If I have sse support on my cpu should I use it?

locke2053 · Posted: Fri Feb 04, 2005 5:33 am Post subject:

It seems the athlonxp does do SSE! I enabled it. Thanks for the /proc/cpuinfo thing. To the guy who asked what it is: SSE is a set of hardware instructions that allow the CPU to do media-related operations faster. It's like MMX or 3dnow or 3dnowext (whatever that is).

codergeek42 · Posted: Fri Feb 04, 2005 5:36 am Post subject:

tuxamd · Apprentice Joined: 28 Jan 2005 Posts: 281

Ah thanks for explaining that

Is it safe to have all 3? And should I recompile my whole system once adding that or is it worth it? Sorry to be asking so many questions but also btw is this the command to recompile it all?

emerge --update --deep --newuse world

GungHo · Apprentice Joined: 27 Aug 2004 Posts: 254

it's safe to use all 3 options with an Athlon-XP. Simply compile with -march=athlon-xp and set the appropriate USE flags in /etc/make.conf, and all is ok

hth