R600g "Soft" FP64 Shows Signs Of Life, Enabling Older GPUs To Have OpenGL 4 In 2018

[Dukenukemx]

It would be mostly useless if someone spent all that effort to do a Vulkan driver for HD 5000/6000 since most games have a GL renderer complementing Vulkan (even with RADV right now it still generally trails RadeonSI performance and any older Vulkan driver would see even less work than RADV so would likely be much slower than R600g) and any Vulkan-only game likely is too demanding for running on HD 5000/6000 class hardware.

The only Vulkan games I'm trying to use is Dolphin and RPCS3. Both of which run already with OpenGL. And we know Doom 2016 runs on the HD 6850 which is what I own. Doom 2016 is going to run on the Nintendo Switch which isn't exactly a powerful machine.

https://www.youtube.com/watch?v=opHA9_eIFHA

[Michael]

A couple questions:
1. Will this reflect OpenCL? Keep in mind, compute tasks are what demand FP64 the most.
2. What exactly is processing the FP64? Is the CPU taking the load? Because if so, I imagine the performance would be so bad that you might as well just use SWR, softpipe, llvmpipe, or whatever. Though, I suppose that also depends on the task being calculated.

If Arlie can manage to get R600 to have at least 1/16 FP64 performance, that'd be incredible. That'd breathe new life in some of this old hardware I have currently running on fglrx.

The soft FP64 support is implemented in GLSL so on the GPU.

[schmidtbag]

A couple questions:
1. Will this reflect OpenCL? Keep in mind, compute tasks are what demand FP64 the most.
2. What exactly is processing the FP64? Is the CPU taking the load? Because if so, I imagine the performance would be so bad that you might as well just use SWR, softpipe, llvmpipe, or whatever. Though, I suppose that also depends on the task being calculated.

If Arlie can manage to get R600 to have at least 1/16 FP64 performance, that'd be incredible. That'd breathe new life in some of this old hardware I have currently running on fglrx.

[gerddie]

Now someone needs to implement tessellation shaders using glsl, e.g.
http://www.diva-portal.org/smash/get...FULLTEXT01.pdf

What exactly do you mean? The document you are linking to is from 2010. OpenGL defines tesselation shaders. and R600 supports them.

[marvin42]

Now someone needs to implement tessellation shaders using glsl, e.g.

http://www.diva-portal.org/smash/get/diva2%3A831131/FULLTEXT01.pdf

[marvin42]

Which cards expected to get this treatment?

Even HD3xxx , HD4xxx?

any card that is supported by r600 (down to HD2000?)

[airlied]

It would be mostly useless if someone spent all that effort to do a Vulkan driver for HD 5000/6000 since most games have a GL renderer complementing Vulkan (even with RADV right now it still generally trails RadeonSI performance and any older Vulkan driver would see even less work than RADV so would likely be much slower than R600g) and any Vulkan-only game likely is too demanding for running on HD 5000/6000 class hardware.

Not everyone has a xeon, radv at least on lower CPUs seems to win out,

But apart from Cayman I doubt a Vulkan driver would be worth it.

Dave.

[Michael]

Anyone interested to back-port Vulkan for HD5-6 series?

It would be mostly useless if someone spent all that effort to do a Vulkan driver for HD 5000/6000 since most games have a GL renderer complementing Vulkan (even with RADV right now it still generally trails RadeonSI performance and any older Vulkan driver would see even less work than RADV so would likely be much slower than R600g) and any Vulkan-only game likely is too demanding for running on HD 5000/6000 class hardware.

[Leopard]

Which cards expected to get this treatment?

Even HD3xxx , HD4xxx?

[artivision]

Anyone interested to back-port Vulkan for HD5-6 series?