On Jul 11, 2006, at 7:11 AM, Garrett D'Amore wrote:

> AFAIK, MMX and SSE have _nothing_ to do with floating point.  It  
> may be
> true that these are _also_ unsafe in the kernel, for the same reasons
> that floating point is unsafe (i.e. they aren't saved on context
> switches) -- maybe someone familiar with the i386 port can verify?

Their registers overlap the FPU.  They are also unsafe to use.

-- thorpej