https://bugs.freedesktop.org/show_bug.cgi?id=31013
--- Comment #15 from Tomasz Czapiewski xeros@irc.pl 2010-10-26 22:29:52 PDT --- (In reply to comment #14)
Ok, so it looks like I was wrong about this. I input a shader with 4 indirections to the AMD Shader Analyzer and it crashed, so I'm pretty sure r300 is limited to 3 indirections. I'm guessing that the reason this works on Windows with r300 hardware is because that driver has some sort of software fall-back, which r300g doesn't have.
So does fglrx on Linux have this software fall-back, too? As now it's been confirmed that on fglrx on Linux it worked, too before fglrx dropped R300-R500 support. And game developers have told me that this shader code was specially designed for Radeon 9600 (RV350) with fglrx.