In Road To OpenCL, R600g LLVM Back-End Arrives

[smitty3268]

It currently looks something like this:

App -> OpenGL -> GLSL IR -> TGSI -> hardware

The new stack allows this:

App -> OpenGL -> GLSL IR -> TGSI -> LLVM -> hardware

But in the long run, it would make this possible:

App -> OpenCL -> LLVM -> hardware,

as well as

App -> OpenGL -> GLSL IR -> LLVM -> hardware

[AnonymousCoward]

I don't get all this hype about OpenCL. I'm sure that there are some specialized niche applications making use of OpenCL but as a consumer I'd rather see AMD devoting some manpower to finally get video decoding working on the open drivers.

[bridgman]

I think the idea is to let clover feed LLVM IR directly into the driver while continuing to support TGSI for graphics. Anyways, the cool thing is that once the code can go from LLVM IR to hardware instructions all kinds of interesting things can be built on top.

[MuPuF]

with toms work App(graphics or something) >> OpenGL >> LLVM to TGSI >> HW >> magic on the screen

Well, that would actually look like this:

App(graphics or something) >> OpenGL (G3D state tracker) >> TGSI (G3D's IR of choice) >> LLVM IR >> LLVM backend for AMD cards >> HW >> magic on the screen

I'm just speaking about the code, no runtime or anything.

[89c51]

This will make any gallium interface accelerated. Clover needs to support HW acceleration on a gallium interface first though, but this is a step in the right direction.

if i get the whole G3D thing right (which i probably don't) the order is somehow like App(graphics or something) >> OpenGL >> TGSI >> HW >>magic on the screen

with toms work App(graphics or something) >> OpenGL >> LLVM to TGSI >> HW >> magic on the screen

so if Clover has (or gets) an llvm backend will be accelerated



yes the question might be stupid or trivial to some so i appologize

[Laughing1]

this are the stuf that will make Clover HW accelerated right?

This will make any gallium interface accelerated. Clover needs to support HW acceleration on a gallium interface first though, but this is a step in the right direction.

[89c51]

this are the stuf that will make Clover HW accelerated right?

[Veerappan]

Phoronix: In Road To OpenCL, R600g LLVM Back-End Arrives

Before calling it a week, Tom Stellard at AMD published a Git branch that offers up an LLVM shader back-end for the AMD R600 Gallium3D driver. This is one of the steps in bringing Compute/OpenCL support to the open-source AMD Radeon Linux graphics drivers...

http://www.phoronix.com/vr.php?view=MTAyNTg

Very cool. I'll be anxiously awaiting more news about this.

[phoronix]

Phoronix: In Road To OpenCL, R600g LLVM Back-End Arrives

Before calling it a week, Tom Stellard at AMD published a Git branch that offers up an LLVM shader back-end for the AMD R600 Gallium3D driver. This is one of the steps in bringing Compute/OpenCL support to the open-source AMD Radeon Linux graphics drivers...

http://www.phoronix.com/vr.php?view=MTAyNTg