Re: [BUG] PPC math-emu multiply problem

[Greg Weeks]

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.

Greg Weeks
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