Two More GL4 Extensions Enabled In Mesa 10.7 Git For RadeonSI

[phoronix]

Phoronix: Two More GL4 Extensions Enabled In Mesa 10.7 Git For RadeonSI

David Airlie today landed support for the ARB_gpu_shader_fp64 and ARB_vertex_attrib_64bit OpenGL extensions within Mesa Git master...

http://www.phoronix.com/scan.php?page=news_item&px=Mesa-10.7-RadeonSI-Two-More

[Creak]

And for the first time radeonsi implements something that r600 doesn't have already!

http://mesamatrix.net

[log0]

Dave also has been pushing ARB_shader_subroutine. GL4 is near

[yoshi314]

And for the first time radeonsi implements something that r600 doesn't have already!

http://mesamatrix.net

tesselation is coming for it, too. and for r600g not so much.

[rafirafi]

It would be nice to have fp64 for the rv7** supporting it. Especially as radeon is the only remaining driver and the rv7** cards are not so bad compared to todays's amd entry level ones.

[agd5f]

Dave implemented Fp64 support for cayman:

http://cgit.freedesktop.org/~airlied/mesa/log/?h=arb_gpu_shader_fp64_cayman

It shouldn't be too hard to port the necessary changes back to older asics. The r600 asics that natively supported doubles are:
R600, RV670, RV770, RV740, Cypress, Cayman

[Kano]

When can we see tesselation in mesa git?

[airlied]

It would be nice to have fp64 for the rv7** supporting it. Especially as radeon is the only remaining driver and the rv7** cards are not so bad compared to todays's amd entry level ones.

the rv7xx really doesn't do fp64 all that well, it hasn't got all the opcodes ARB_gpu_shader_fp64 needs to make it just work, it's probably more targeted at OpenCL 1.0 double support than GL.

I can't even think of any apps that would use it either.

Dave.

[rafirafi]

Thanks to Alex and Dave for the explanations.
Let's hope that one app will use the extension... for the sake of the ones which took the time to implement it