[Beignet] [PATCH] GBE: disable spill register under simd16 mode.

[Matt Turner]

On Thu, Nov 20, 2014 at 8:09 PM, Zhigang Gong <zhigang.gong at intel.com> wrote:
> Register spilling awlays cost much more than fallback to simd8
> which could avoid register spilling or at least reduce the spilled
> registers.

For what it's worth, we made the same decision in the i965 Mesa driver.

There has been some conjecture that a spilling SIMD16 program *could*
potentially be faster than a non-spilling SIMD8 program, but I don't
know of any hard evidence.