Re: [Mesa3d-dev] PK/UP* and NV_[vertex|fragment]_program* support in Gallium?

[Luca B. <lu...@lu...>]

> At some stage we're definitely interested in the gpu_program4 extension.
> I'm not sure the older ones will ever be pulled in.
swrast already supports NV_fragment_program_option (nv30) and
NV_vertex_program_1_1 (nv20).
nv30/nv40 support of those should be easy, but requires to extend TGSI
with condition codes and ideally precision and precision hints too.
nv50 support is probably harder.
Note that NV_gpu_program4 is mostly a superset of the older
extensions, so it doesn't make much sense to have it in isolation.

> Basically I'd like to see them removed until they actually get used, at
> which time they're welcome back in...
Yes, seems a good idea.
In particular, all the "assert(0)" or similar implementations make no
sense: all instructions should be implemented, unless they are
conditional on some capability bit, in which case they should be
handled by the default switch case.