This is the mail archive of the
gdb@sourceware.cygnus.com
mailing list for the GDB project.
Re: [PATCH] Updates to FXSR/SSE support in 2.4.0-test1
- To: gareth at precisioninsight dot com (Gareth Hughes)
- Subject: Re: [PATCH] Updates to FXSR/SSE support in 2.4.0-test1
- From: Alan Cox <alan at lxorguk dot ukuu dot org dot uk>
- Date: Sun, 11 Jun 2000 01:42:30 +0100 (BST)
- Cc: kettenis at wins dot uva dot nl (Mark Kettenis), alan at lxorguk dot ukuu dot org dot uk,drepper at redhat dot com, adam at yggdrasil dot com, linux-kernel at vger dot rutgers dot edu,bug-glibc at gnu dot org, gdb at sourceware dot cygnus dot com
> What happens when a signal occurs in a time slice where the application
> hasn't used the FPU? Having the regular FPU environment around means we
You touch the FPU, it loads the FPU state you save both. If the FPU state
is already loaded it costs nothing. The FNSAVE stuff is horribly slow so
it is a real concern
> I'll play around with the conversion into/out of the signal handler and
> GETFPREGS request. Should only take a short while, so don't do anything
> with the stuff I sent out yesterday.
Right now its correct, this is about being correct clean and fast so we are
going the right way