func: void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
  {
      const ARMCPRegInfo *ri = rip;
      switch (ri->accessfn(env, ri)) {
      case CP_ACCESS_OK:
      case CP_ACCESS_TRAP:
          break;
      case CP_ACCESS_TRAP_UNCATEGORIZED:
          env->exception.syndrome = syn_uncategorized();
          break;
      default:
          g_assert_not_reached();