https://bugs.freedesktop.org/show_bug.cgi?id=54767
--- Comment #4 from madbiologist s.j.turner@uqconnect.net --- (In reply to comment #3)
r300 cannot pass some of the tests, because the hardware is too limited (some features cannot be implemented on r300), while other features may produce slightly different results due to precision issues. Some tests are simply unfixable.
Does that include atan(vec4, vec4) in fragment shader? I have a Radeon 9800 Pro 128MB (R350).