Comment # 5 on bug 58666 from Andy Furniss

(In reply to comment #4)
> Created attachment 74053 [details]
> Possible Fix
> 
> It looks like we were telling the backend that RV670 is an R700 GPU, when it
> is really an R600.  R600 chips uses a slightly different instruction
> encoding.  This patch should fix it, can you test?

Yes, this fixes it - demos are all OK (well at least the same as my rv790) and
a brief run of etqw worked.