thus Jason Thorpe spake:
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.
hm, putting my PowerPC hat aside, IIRC this is obsolete since SSE2 [0]. with SSE4 intel seems to have the same efficiency as a G4 has since 1999 ;)
They are also unsafe to use.
as is hyperthreading (cache snooping between cores). [0] -- http://en.wikipedia.org/wiki/SSE2 timo