3 commits

Author	SHA1	Message	Date
Matt Turner	43ef75b394	nir: Add system values from ARB_shader_ballot ... We already had a channel_num system value, which I'm renaming to subgroup_invocation to match the rest of the new system values. Note that while ballotARB(true) will return zeros in the high 32-bits on systems where gl_SubGroupSizeARB <= 32, the gl_SubGroup??MaskARB variables do not consider whether channels are enabled. See issue (1) of ARB_shader_ballot. Reviewed-by: Connor Abbott <cwabbott0@gmail.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>	2017-07-20 16:56:49 -07:00
Matt Turner	742cc6118a	nir: Support lowering vote intrinsics ... ... trivially (as allowed by the spec!) by reusing the existing nir_opt_intrinsics code. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>	2017-07-20 16:56:49 -07:00
Matt Turner	d4c9d6a3b2	nir: Add pass to optimize intrinsics ... Specifically, constant fold intrinsics from ARB_shader_group_vote, but I suspect it'll be useful for other things in the future. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>	2017-07-20 16:56:49 -07:00