[SDL] 3DNow! on Intel processors

[Sam Lantinga]

> Hello, All!

> While getting CPU info on my P3 and P4, I've found that 3DNow extension flag
> is setted up on both intel processors. I think need to add a CPU vendor
> identification before testing CPU features. Or I missed smth ? :)

Yep.  SDL in CVS has an API to detect CPU features like this.
Check out SDL_Has3DNow() and friends in SDL_cpuinfo.h

See ya!
	-Sam Lantinga, Software Engineer, Blizzard Entertainment