2012/6/21 Alex Deucher <alexdeuc...@gmail.com>: > If you just want to play with simple shaders and setting up the 3D > pipeline, radeondemo is an easy place to start: > http://cgit.freedesktop.org/~airlied/radeondemo > > Alex
Yes, I'm learning the assembly, because it helps me have a better understanding of the architecture. I'm trying to find a research topic in high-level programming language implementation. r600 being a convenient and documented example of a GPU. One month ago, my question to this list was "Loading and executing an R600 program", you pointed radeondemo to me and then also Adam Rak's HD-Radeon-Compute. I have been reading that code and I want to write small programs such as those in evergreen_shader.c. By now I understand most of it and reproduced the functionality in my code avoiding the use of libdrm (using ioctls directly). However, I still didn't go past the pipeline setup, because I'd like to test on my r600, not an evergreen (more convenient). It appears that on the r600 setting up a single Pixel Shader is what would be more similar to a "compute mode". So, getting all those PM4 packets together to set up the pipeline has not been easy. I have been reading the R6xx_R7xx_3D and R6xx_3D_Registers pdfs from AMD. It is a pitty that this packet communication is unidirectional, I can't do a sort of ping and see if a small sequence of packets yielded a given result. I still didn't send my first sequence of PM4 packets using the DRM_IOCTL_RADEON_CS, but that is my next step. I'm working here: https://github.com/migle/trials/tree/master/radeon But thanks, you all have been helpful, and I know where to go to when I have a specific doubt. For now, if you have an idea about a minimal sequence of PM4 packets for r600... Right now, I'm reading r600_init_atom_start_cs in mesa/src/gallium/drivers/r600/r600_state.c. Thank you, -- Miguel Ramos PGP A006A14C _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
