On Mon, Jul 19, 2010 at 04:01:02PM -0700, Benjamin Segovia wrote: > - Improved optimization of GPU programs. Now, swizzling is taken into account > and swizzles are properly transformed while removing mov instructions. > Removals of mov instructions are now much more effective > > - Analysis of control flows is still very primitive and far more too > conservative. Shaders using a lot of branches will be less optimized than > straightforward ones > > - Main things to do next is: > * instruction merging like for example merging: > mul a.x b.x c.x > mul a.y b.y c.y > mul a.z b.z c.z > into > mul a.xyz b.xyz c.xyz > * register renaming to avoid some still unecessary movs >
> - Tested with piglit. I run all the shaders and compare output from the new > version with the old one. Also, run openarena, nexuiz and warsow. All games > perfectly run and GPU code is clearly improved. Note that I only use my > Intel > Gen GPU for the backend. So everything was tested using classic Mesa with > the Intel i965 driver. Hi, I tried this patch out with the r300 backend and it looks pretty good. I didn't do very extensive testing or anything, but the code output from the mesa compiler is much better. I think the instruction merging will make a big difference once you get it done. I've seen a lot of shaders like this one: https://bugs.freedesktop.org/attachment.cgi?id=36940 from fdo bug #28860 that waste a lot of instructions doing single component moves. Nice work! -Tom _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
