[Mesa-dev] [PATCH 0/3] Enable ARB_gpu_shader_fp64 for i965

[Matt Turner]

Readding mesa-dev@ to Cc.

On Sat, Apr 11, 2015 at 11:06 AM, Darius Goad <alegend45 at gmail.com> wrote:
> Well, I did make a v2, but all that did was fix a bug. How does this not
> come close?

Well, for instance the i965 driver supports ~5 generations of
hardware, three of them that don't support doubles. There's not a
brw->gen >= ... conditional in any of the patches.

The third patch modifies ilo, a Gallium driver -- not i965. The
extension isn't actually being enabled on i965.

I'm not actually convinced the second patch compiles. It uses fabsd(),
which as far as I can tell should just be fabs().

Implementing double support is a pretty significant project that's
going to involve some serious understanding of the i965 instruction
set.

Topi has some work-in-progress branches for fp64 support
(http://cgit.freedesktop.org/~tpohjola/mesa/). Take a look at them to
get a better idea of what's involved.