Comment # 16 on bug 83510 from Marek Olšák

(In reply to Henri Verbeet from comment #11)
> (In reply to Marek Olšák from comment #10)
> > However, Tonga and later hardware doesn't have the legacy dx9 opcodes for
> > MUL, MAD, RCP, RSQ, and LOG and they must be emulated with a comparison (or
> > V_CLASS_F32 that returns whether it's NaN/+-Inf/Denorm/+-0/etc) +
> > conditional assignment. It's better to do the conditional assignment after
> > every RCP than after every MUL.
> 
> Interesting, I wonder how that works out for Direct3D 9 applications. I
> don't suppose there's a global switch instead like (at least some) Intel and
> NVIDIA hardware has?

Yes, there is. See the commit.

Fixed by Mesa commit 2150db4d5daad3781876254d2b440367afd756cd. Closing.