On Tue, Sep 17, 2002 at 12:03:10PM -0700, Greg Lindahl wrote: > On Tue, Sep 17, 2002 at 11:48:31AM -0700, Jun Sun wrote: > > > I think this gives a big performance improvement because most processes > > don't use FPU during their runs but they all have used_math flag set! > > Jun, > > You really ought to prove that first. Many people spend a lot of time > optimizing things that aren't important. If it isn't important, than > the simplest scheme is the best choice. Oh, he's quite correct. There's a setjmp() early in the execution path, and it saves FP registers on machines with FP support configured on. So tasks are marked as FPU users. I've never thought of a terribly good way around this. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer
