Lionel Landwerlin
02294961ee
This will make things easier in situations where we don't want to use
the binding table at all (indirect draws/dispatches).
The mechanism is simple, upload a vec3 either through push constants
(<= Gfx12.0) or through the inline parameter register (>= Gfx12.5).
In the shader, do this :
if vec.x == 0xffffffff:
addr = pack64_2x32 vec.y, vec.z
vec = load_global addr
This works because we limit the maximum number of workgroup size to
0xffff in all dimension :
maxComputeWorkGroupCount = { 65535, 65535, 65535 },
So we can use the large values to signal the need for indirect
loading.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31508>
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