[Nouveau] NV50 compute support questions

[Pierre Moreau]

Hello Hans,

IIRC, Samuel wrote the kernel directly in assembly by hand. 

As for me, I manually wrote the SPIR-V binary for the kernel, hacked clover to use it as if it had been produced by the regular LLVM path, and then fed it into the WIP SPIR-V to NV50 IR translator. I can send the instructions on how to get it working later today. 

(Some more comments below)

> On 20 Nov 2015, at 11:36, Hans de Goede <hdegoede at redhat.com> wrote:
> 
> Hi Samual, et al,
> 
> In http://cgit.freedesktop.org/mesa/mesa/commit/src/gallium/drivers/nouveau?id=ff72440b40211326eda118232fabd53965410afd
> you write: "This compute support has been tested by
> Pierre Moreau and myself with some compute kernels."
> 
> Can you provide testing instructions (and the
> necessary files) so that I can try to reproduce
> your tests ?
> 
> And once I've reproduced your tests, the next
> question is where / how did you get the compute
> kernels for testing. I guess you manually wrote them ?
> 
> As you know I'm working on a llvm tgsi backend,
> it actually produces some output now, if you want
> to take a peek it lives here:
> http://cgit.freedesktop.org/~jwrdegoede/llvm
> 
> Before working further on this I want to take
> a bottom up approach, so I want to first make
> sure we've working TGSI -> compute-kernel and
> compute-kernel -> hardware steps. So the next
> question is, do you know if we can go from
> (manually written) TGSI to a compute-kernel
> using say nouveau-compiler ?

IIRC, it should be possible… but I'll have a look at it this evening. 

Regards,
Pierre

> 
> And if not, do you know what is missing to do
> this?
> 
> Thanks & Regards,
> 
> Hans