Re: sunffb
Martin Husemann <[email protected]>
| Newsgroups | gmane.comp.xfree86.devel |
|---|---|
| Message-ID | <[email protected]> |
On Tue, May 31, 2005 at 08:23:39AM -0600, Marc Aurele La France wrote:
> What does NetBSD do with the trap?
Re-enable the FPU, restore old FPU state, and retry. No signal to userland
is generated.
This is the standard lazy fpu saving game - it just did not occur to us
that userland code would try the trick played here. We are now investigating
and might special case this too. The current trap handling for this case
in NetBSD definitively is suboptimal.
> Another option would be to export something like xf86{En,Dis}ableFPU() from
> os-support/ and have OS-specific implementations there.
I'm not sure this is worth it.
Martin