Re: [Mesa3d-dev] SSE/3DNow assembler performance?

[Keith H. <Kei...@bt...>]

----- Original Message -----
From: "Kendall Bennett" <Ken...@sc...>
To: <Mes...@li...>
Sent: Wednesday, October 22, 2003 12:53 AM
Subject: [Mesa3d-dev] SSE/3DNow assembler performance?


> Is the SSE/3DNow code fast at all?

I know for sure that the 3DNow codepath was always significantly faster when
I ran tests. It could be that the SSE path isn't quite as efficient - I
don't recall the test figures as well as the 3DNow figures. I do recall that
in one circumstance I got something like a tripling of frame rate in the
Gears sample app (3DNow CPU).

Also, the fastpaths are pretty moot if you're using software rendering,
IMHO. ;-)

If you want the fastest theoretical Mesa build then don't forget to include
the "asm" defines.

GLDirect Release builds included the full set of fastpaths (in my VC6
project files, anyway :). You could try a Release build with and without
those defines - the difference should be easy to see.