Zack Rusin wrote: > On Tuesday 15 May 2007 06:29:43 am Keith Whitwell wrote: >> Of particular interest to us is the runtime code generator and shader >> compiler. We have been developing something we're calling the "Tungsten >> Graphics Shader Infrastructure", which is intended to be a retargetable >> compiler for GLSL and similar high level shading languages, anchored >> around shared intermediate representations and a common optimization >> framework. I should be able to thow some documents up on the web soon >> to throw a bit of light on this. > > Hmm, I really hate to mention this for the first time like this but I think > it's better if people know and Roberto and I will just announce it properly > later. > > I have been toying around with writing a proper shading infrastructure for > Mesa for a while now. Finally I managed to convince Roberto to help me with > it and we started. Both of us work on it in the spare-time-of-a-spare-time > and I wanted to wait with announcing it until we have proper benchmarks and > one of the drivers done but here's the bottom line: we're bringing LLVM in > Mesa. > > http://llvm.org
I looked at LLVM a while ago too. I guess I had questions about vector support, swizzling, writemasking and other GPU-unique constructs and how LLVM would map them onto actual target systems. Getting parallelism (performance) out of a chip like the 965 seems to require some fairly intricate coding. I don't know how well LLVM would deal with that kind of thing. I agree that the optimization framework of LLVM is pretty darn attractive. My GLSL compiler does reasonably good code generation on the small scale but higher-level things like factoring out common sub-expressions, strength-reduction, etc. are beyond its ability. -Brian ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
