#include _CLC_DEF size_t get_group_id(uint dim) { switch (dim) { case 0: return __nvvm_read_ptx_sreg_ctaid_x(); case 1: return __nvvm_read_ptx_sreg_ctaid_y(); case 2: return __nvvm_read_ptx_sreg_ctaid_z(); default: return 0; } }