"Maciej W. Rozycki" <macro@xxxxxxxxxxxxxx> writes: > On Thu, 5 Feb 2015, Måns Rullgård wrote: > >> >> If you have access to processors with a working Status[RE] bit, you could >> >> empirically determine how they work. >> > >> > Well, I do actually, I have a working machine driven by an R4000 >> > processor. It was the original implementation of the Status.RE feature >> > and therefore it can be used as the reference. I don't feel tempted to >> > use my time to actually make any checks though. >> >> Is it reasonably easy to test this on an R10000 (SGI Octane) running >> IRIX 6.5? > > I doubt it. I think the easiest way to experiment with this feature is > to modify Linux so as to run its userland with CP0.Status.CU0 set to one Unfortunately, this machine doesn't have Linux installed, and I can't find an easy way to change the status register for userspace under IRIX. -- Måns Rullgård mans@xxxxxxxxx
