[Mesa-dev] [PATCH] i965: Respect the no_8 flag on Gen6, not just Gen7+.

[Matt Turner]

On Fri, Jan 9, 2015 at 8:46 PM, Kenneth Graunke <kenneth at whitecape.org> wrote:
> When doing repclears, we only want to use the SIMD16 program, not the
> SIMD8 one.  Kristian added this to the Gen7+ code, but apparently we
> missed it in the Gen6 code.  This patch copies that code over.
>
> Approximately doubles the performance in a clear microbenchmark from
> mesa-demos (clearspd -width 500 -height 500 +color) on Sandybridge.

What was actually happening? We were attempting to use a nonexistent
SIMD8 program as well? Or the SIMD16 repclear program just wasn't
getting used at all?