Re: MIPS32 patches breaking DecStation

["Kevin D. Kissell" <kevink@mips.com>]

> > Yes, it's cute, but it relies on accidents of implementation to work,
> > and could easily fail on other CPUs otherwise compatible with
> > the R4000.  In principle, such a branch might incur no delay at
> > all on an advanced 64-bit processor.  By all means, use it for
> > the specific cases of the CPUs on which it is known to work,
> > but it should not be used in "default" MIPS CP0 handlers.
> 
> This behaviour of the R4000 branch is documented in the R4000 manual's
> description of the pipeline.

Yes, yes, like I said, use it whenever you see an R4000 PrID
if you like.  Just don't use it as the handler installed for a PrID
not otherwise known to the kernel.

            Kevin K.