GL_KHR_shader_subgroup
https://www.khronos.org/registry/OpenGL/extensions/KHR/KHR_shader_subgroup.txt
GL_KHR_shader_subgroup

	GL_SUBGROUP_FEATURE_BASIC_BIT_KHR 0x00000001
	GL_SUBGROUP_FEATURE_VOTE_BIT_KHR 0x00000002
	GL_SUBGROUP_FEATURE_ARITHMETIC_BIT_KHR 0x00000004
	GL_SUBGROUP_FEATURE_BALLOT_BIT_KHR 0x00000008
	GL_SUBGROUP_FEATURE_SHUFFLE_BIT_KHR 0x00000010
	GL_SUBGROUP_FEATURE_SHUFFLE_RELATIVE_BIT_KHR 0x00000020
	GL_SUBGROUP_FEATURE_CLUSTERED_BIT_KHR 0x00000040
	GL_SUBGROUP_FEATURE_QUAD_BIT_KHR 0x00000080
	GL_SUBGROUP_SIZE_KHR 0x9532
	GL_SUBGROUP_SUPPORTED_STAGES_KHR 0x9533
	GL_SUBGROUP_SUPPORTED_FEATURES_KHR 0x9534
	GL_SUBGROUP_QUAD_ALL_STAGES_KHR 0x9535
