[Mesa-dev] TGSI 16-bit support

Nicolai Hähnle nhaehnle at gmail.com
Sat Aug 26 14:18:33 UTC 2017

On 26.08.2017 00:46, Timothy Arceri wrote:
> On 26/08/17 00:50, Nicolai Hähnle wrote:
>> On 25.08.2017 13:58, Marek Olšák wrote:
>>> Nicolai,
>>> Have you thought about switching to NIR for radeonsi completely to 
>>> get 16-bit support? We need NIR support anyway for spirv, right? 
>>> Would be it be easier than adding 16-bit support into TGSI, 
>>> glsl2tgsi, and tgsi2llvm?
>> Well. What's missing from the NIR path is:
>> (1) GS and tess (the ABI parts only)
>> (2) re-adding some minor extensions (shader_group_vote?)
>> (3) fixing all the bugs -- it's been a while since I've done a piglit 
>> comparison
>> There's a bunch of unknowns, so it's hard to say, but once we're there 
>> 16-bit should be much easier, so may be worth it.
> Hi Nicolai,
> Do you have a branch somewhere with your latest work on this? Or is it 
> all in Mesa currently?
> I tried to run master on shader-db to see if the NIR path gave us any 
> big changes either way. However I had to stop it as it hit 11GB of mem 
> and rising. Not sure yet if this was a memleak, or we got stuck in a 
> loop somewhere.

I currently have no pending NIR-only patches. There's a bunch of 
experimental SPIR-V stuff that needs rebasing, but nothing that should 
affect the standard GLSL-via-NIR path.


>> Cheers,
>> Nicolai

Lerne, wie die Welt wirklich ist,
Aber vergiss niemals, wie sie sein sollte.

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