When you add it to the task switcher, it takes away a lot of cpu cycles
during each task switch and slows down your system. I think this was the
main idea behind _not_ saving those registers. IMHO, it does not make
sense to generally save these registers when nobody else but your driver
uses them.
Good luck!
Reto
david wrote:
>
> hi i need fast fpu in the kernel for my lexos work
> so how am i going to do it on the i386
>
> 1 . can i add some save / restore code to the task swicher ( the right
> way )
> so when it switchs from user to kernel task its saves the fpu state
> ?
>
> 2 . put the save / restore code in my code (NOT! GOOD! i do not wont to
> do it this way it is not the right way)
>
> so i have to use fpu in the kernel so its just how am i going to do it ?
>
> thank you
>
> David Rundle <sector2@ihug.co.nz>
>
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This archive was generated by hypermail 2b29 : Wed Nov 15 2000 - 21:00:13 EST