On Thursday 10 December 2009 11:25:48 Younes Manton wrote:
> On Thu, Dec 10, 2009 at 5:32 AM, Zack Rusin <za...@vmware.com> wrote:
> > On Wednesday 09 December 2009 20:30:56 Igor Oliveira wrote:
> >> Hi Zack,
> >>
> >> 1) agreed. OpencCL is a complete different project and should exist in
> >> a different repository.
> >> 1.1) Well use Gallium as CPU backend is a software dilemma:
> >> "All problems in computer science can be solved by another level of
> >> indirection...except for the problem of too many layers of
> >> indirection"
> >> But in my opinion we can use Gallium for CPU operations too, using
> >> gallium as a backend for all device types we maintain a code
> >> consistency.
> >
> > Yes, it will certainly make the code a lot cleaner. I think using
> > llvmpipe we might be able to get it working fairly quickly. I'll need to
> > finish a few features in Gallium3d first. In particular we'll need to
> > figure out how to handle memory hierarchies, i.e. private/shared/global
> > memory accesses in shaders. Then we'll have some basic tgsi stuff like
> > scatter reads and writes to structured buffers, types in tgsi (int{8-64},
> > float, double}, barrier and memory barrier instructions, atomic reduction
> > instructions, performance events and likely trap/breakpoint instructions.
> > We'll be getting all those fixed within the next few weeks.
>
> Doesn't seem like the current pipe_context is suited to the
> requirements of a compute API.
Can you be more specific? Which parts you don't think are suited for it?
> Should it be made larger or is another kind of context in order?
I don't see anything missing from pipe_context to warrant a new interface.
What exactly is your concern?
> Under the hood on nvidia cards there's are
> seperate hardware interfaces for compute, graphics, video, even though
> there is some duplicate functionality, so it's not like most of the
> code of our current pipe_context would be reused*, so to me a
> different type of context makes sense.
Really? To be honest I've never seen any compute specific hardware in nvidia,
what is it?
z
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