math/fmax.cl math/fmin.cl math/native_rsqrt.cl math/rsqrt.cl synchronization/barrier.cl workitem/get_global_offset.cl workitem/get_group_id.cl workitem/get_global_size.cl workitem/get_local_id.cl workitem/get_local_size.cl workitem/get_num_groups.cl workitem/get_work_dim.cl