[virglrenderer-devel] [PATCH 0/3] TGSI_FILE_HW_ATOMIC support

[Dave Airlie]

On 19 July 2018 at 23:41, Tomeu Vizoso <tomeu.vizoso at collabora.com> wrote:
> Hi,
>
> just thought of sending this patches even if it's not the best moment to
> merge them, just in case anyone is curious. I plan to rebase and resend
> once SSBO and image support is merged in master.
>
> The need for this arises from Gallium otherwise implementing atomic
> counters with SSBOs and reserving half of the shader blocks for that.
> This is problematic because some dEQP tests assume that more than 6
> blocks are available when drivers such as i915 provide 12 in the host.

I was wondering if we need to this far or could we just detect
BUFFER[0], ATOMIC decls
and convert those to atomic counters somehow?

The TGSI_FILE_HW_ATOMIC stuff is quite attunded to r600 hw atomics, and I'm
not sure how well it maps to virgl, like it all the tests tpass with
it, then maybe it
should be fine.

Dave.