On Thu, May 21, 2015 at 10:05 AM, Robert Morell <rmor...@nvidia.com> wrote: > Hi Ilia, > > On Sat, May 02, 2015 at 12:34:21PM -0400, Ilia Mirkin wrote: >> Hi, >> >> As I'm looking to add some support to nouveau for features like atomic >> counters and images, I'm running into some confusion about what the >> first word of the shader header means. Here is the definition as we >> have it today: > > [...] > >> However I know that these are somewhat wrong. I've seen shaders that >> use gmem accesses (i.e. mov r0, [r0]) that just have the LMEM enable >> bit set (and they use no lmem). And I've seen additional bits set, esp >> relating to images, but I haven't spent enough time looking at all the >> variations to make sense of it yet. For example, I think that Fermi >> and Kepler+ have different meanings for some of the bits. > > Those look pretty close :) > >> I was hoping you could just release the docs for the shader headers, >> or at least the first word of the shader header. > > We've posted the specification for the full Shader Program Header to our > GPU documentation site here: > > ftp://download.nvidia.com/open-gpu-doc/Shader-Program-Header/1/Shader-Program-Header.html > > I hope it helps clear things up.
Yep, just a few follow-up questions: - SPH Type 1 and type 2 appear to be flipped wrt the tables -- "When PS is used, field SphType in CommonWord0 must be set to 1; similarly, when VTG is used, SphType in CommonWord0 must be set to 2." But the "Table 1. SPH Type 1 Definition" is clearly meant for VTG and table 2 is clearly meant for PS... - You skip over SassVersion -- what is that? - You have a funny note in there -- "Triangles generated by the geometry shader always have all their edge flags set to TRUE" -- that is the *only* reference to edge flags in the whole document. Right now we do some crazy thing to get edge flags right on fermi+ (and I think we just get them wrong on tesla). Is there a way to emit edge flags from vertex shader? - To be clear: DoesLoadOrStore -- *any* load/store? Even LDC? ALD? Thanks! -ilia _______________________________________________ Nouveau mailing list Nouveau@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/nouveau
