On Wed, May 25, 2011 at 9:41 AM, Keith Whitwell <kei...@vmware.com> wrote: > On Wed, 2011-05-25 at 09:32 -0400, Jerome Glisse wrote: >> On Tue, May 24, 2011 at 8:09 PM, Bryan Cain <bryanca...@gmail.com> wrote: >> > Hi, >> > >> > In the past few days, I've been working on native integer support in my >> > GLSL to TGSI translator. Something that's come to my attention is that >> > supporting Gallium targets with and without integer support using a >> > single GLSL IR backend will more or less require a GLSL IR pass to >> > convert int, uint, and possibly bool variables and operations to floats. >> > >> > Currently, this is done directly in the backend, in both ir_to_mesa and >> > st_glsl_to_tgsi. However, the mod_to_fract and div_to_mul_rcp lowering >> > passes for GLSL IR need to know whether to lower integer modulus and >> > division operations to their corresponding float operations. (They both >> > do this in Mesa master without asking the backend, but that will be easy >> > to change later.) So a GLSL IR pass will be needed to do the type >> > lowering. >> > >> > Such a pass would also have the advantage of less duplicated >> > functionality between backends, since ir_to_mesa could also take >> > advantage of the pass to eliminate some code. >> > >> > I'm more than willing to try writing such a pass myself if no one else >> > is interested in doing it, but I figure I should make sure there are no >> > objections before starting on it. >> > >> > Bryan >> >> TGSI needs to grow type support (int, uint and possibly int8,16,32..) > > Or go away entirely... > > I'm not trying to impose a direction on this, but it seems like the GLSL > IR->TGSI converter (once running) could be pushed down into the > individual drivers and GLSL IR or a close cousin of it could become the > gallium-level interface. Then individual drivers could be modified to > consume IR directly. > > Keith > >
I am also in favor of getting rid of tgsi, i would prefer having the driver callback into mesa to set informations mesa needs from the shader, for instance that would allow driver to pick where they put attribute (might be a huge win on hw like r6xx or newer) and few others things like that. Cheers, Jerome _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev