[Mesa-dev] [PATCH] st/glsl_to_tgsi: fix mismatch between TGSI BFI/BFE and GLSL

[Nicolai Hähnle]

On 24.10.2016 15:38, Nicolai Hähnle wrote:
> On 24.10.2016 15:34, Ilia Mirkin wrote:
>> These work properly on nvc0. I'd rather you work around it in your
>> backend.
>
> That's not a good solution because of how the opcodes are defined. How
> about TGSI_OPCODE_{BFI,[UI]BFE}_GLSL and an associated pipe cap that
> gets enabled for nvc0?

Or we can declare that the semantics of BFI/BFE should just be in line 
with what GLSL wants. I don't know if there are other state trackers 
that rely on it, it seems that you were actually the one who introduced 
the wording in tgsi.rst...

Nicolai