

Command Reference 2.  FPGA Express Shell Commandsset_module_hierarchy


_N_A_M_E
          set_module_hierarchy
                         Specify hierarchical boundary options
                         for optimization.


SYNTAX
          string set_module_hierarchy
                    {_p_r_e_s_e_r_v_e | _e_l_i_m_i_n_a_t_e |_i_n_h_e_r_i_t}
                    _m_o_d_u_l_e__l_i_s_t

          string    _p_r_e_s_e_r_v_e, _e_l_i_m_i_n_a_t_e, _i_n_h_e_r_i_t
          list _m_o_d_u_l_e__l_i_s_t


ARGUMENTS
          _p_r_e_s_e_r_v_e       Preserve the boundary of the module
                         during optimization.

          _e_l_i_m_i_n_a_t_e      Eliminate the boundary of the module
                         during optimization.

          _i_n_h_e_r_i_t        Inherit the hierarchy option from the
                         parent of the module.


          _m_o_d_u_l_e__l_i_s_t    List of modules for which the hierarchy
                         boundaries is to be set.


DESCRIPTION
          This command sets the hierarchical boundary option for
          the modules in the module list.  This option is used
          during optimization to determine whether or not the
          boundary of a module is to preserved.  Preserving the
          boundary will prevent the ports of a module from being
          deleted.  Nets connected to these ports will be
          maintained as separate nets.

          Eliminating the boundary will cause the ports of the
          module to be deleted and the nets connected across the
          boundary via the ports to be merged into a single net.
          The name of the module will be appended along with the
          hierarchy separator character '/' to cells and nets
          that are contained in the module.


EXAMPLES
          In this example, the modules /test1/C1, /test1/C2, and
          /test1/C3 are set to inherit their parent module
          boundary hierarchy.


v3.0      Synopsys Inc. 1988-1998. All rights reserved.       2-1


set_module_hierarch2y.  FPGA Express Shell Commands  Command Reference


          fe_shell > set mod {/test1/C1 /test1/C2 /test1/C3}
          /test1/C1 /test1/C2 /test1/C3

          fe_shell > set_module_hierarchy inherit $mod

SEE ALSO
          object(2),get_module(2)


2-2       Synopsys Inc. 1988-1998. All rights reserved.      v3.0