[ODE] Some SSE in Quick step

[Russ Smith]

> ATLAS. http://math-atlas.sourceforge.net/
> It's like the world doesn't end at Microsoft boundary after all.

i had actually considered atlas, but it has a few problems in the
context of ODE:

* it's huge: depending on how it's configured you can easily end up with
a multi-megabyte library just to implement a few matrix multiply and
factor functions. that's a big chunk of code if you're writing a game.

* it's only really efficient on big matrices ... it's better suited as a
computational engine for, say, matlab. using it to multiply little 4x4
matrices together is a huge overkill.

* to get maximum efficiency it must be configured for each machine it
runs on, and the configuration process takes maybe half an hour. a
'generic' atlas may perform that well on some machines.

russ.

-- 
Russell Smith
http://www.q12.org