Re: [BUG] PPC math-emu multiply problem

[Tom Rini <trini@kernel.crashing.org>]

On Mon, Aug 16, 2004 at 02:28:32PM -0400, Greg Weeks wrote:

> Tom Rini wrote:
> 
> >>The way I got the LSB tests to pass was to remove the round in the 
> >>denormalised underflow case. This appears to match the hardware 
> >>behavior. I've not looked at the PPC floating point model close enough 
> >>to know if this is proper behavior. It is what the LSB tests are 
> >>expecting and doesn't cause a failure in any of the other LSB tests.
> >>   
> >>
> >
> >Have you guys run the LSB tests on some PPC with hw floating point (is
> >that what you mean by 'matches the hardware behavior' ?) to see if the
> >test also passes there as-is?  And does anyone object to this patch?
> >Now that 2.6.8.1 is out I'm gonna start committing in a bunch of stuff
> >I've had queued up and see if I can get Linus to pull.  Thanks.
> >
> > 
> >
> I didn't run the entire LSB, just some of the math tests. I had an 8260 
> and the 8560 we found the problem on and also a normal x86 box. I think 
> this is the correct fix. At least all of the LSB math tests pass now and 
> the LTP float tests don't complain.

Just to be clear, with that patch, 8260, 8560 and x86 all agree on
results ?

-- 
Tom Rini
http://gate.crashing.org/~trini/