https://bugs.freedesktop.org/show_bug.cgi?id=89069
--- Comment #5 from Iaroslav Andrusyak pontostroy@gmail.com --- (In reply to smoki from comment #3)
But i tested this on Kabini, so who knows... Iaroslav can you test if reverting 0e9cdedd2e3943bdb7f3543a3508b883b167e427 fixes your issue?
Yes, it helps. i think we need something like R600_DEBUG=nosfmath in this case