These are needed for ARB_gpu_shader5
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
This updates the tgsi code from mesa, it introduces
changes necessary to deal with tessellation and doubles.
It also drops an unused saturate feature, which we didn't
use anyways.