losig

LOSIG(3)                MBK LOGICAL STRUCTURE DEFINITIONS               LOSIG(3)



NAME
       losig - mbk logical signal

DESCRIPTION
       The losig is used to describe a logical signal.

       The declarations needed to work on losig are available in the header file
       "/labo/include/mlo404.h", where '404' is the actual mbk version.

       The following C structure supports the description of the logical signal
       :
              typedef struct losig {
                 struct losig     ∗NEXT;
                 struct chain     ∗NAMECHAIN;
                 float            CAPA;
                 long             INDEX;
                 char             TYPE;
                 struct ptype     ∗USER;
              } losig_list;

       NEXT                Pointer to the next losig of the list.

       INDEX               Long integer beeing the signal identifier. It
                           represents the net number at a given hierachical
                           level, and must be unique.

       NAMECHAIN           Pointer to a list of names, aliases, attached to the
                           signal. If no names are given then the field points
                           to NULL. Many names can be present if the signal
                           result of the flatten of a netlist.  See chain(3) for
                           details.

       CAPA                Floating point number containing the value of the
                           total capacitance attached to a signal in respect to
                           ground. This field may be set to zero, since it make
                           sens only if the signal is the result of a layout
                           extraction, or has been used for electrical
                           simulation purposes.

       TYPE                This field can take two legal values depending on the
                           types of the connectors attached to it. See locon(3)
                           for detail.

                           EXTERNAL            The signal is connected at least
                                               to one external connector, a
                                               connector of the figure beeing
                                               described.

                           INTERNAL            The signal is connected only to
                                               instances or transistors
                                               connectors.

                           The tools using the TYPE should fill it with care,
                           since unexpected results may appear if the
                           consistency with connectors is violated.

       USER                Pointer to a ptype list, see ptype(3) for details,
                           that is a general purpose pointer used to share
                           informations on the signal.

       Remark :            the netlist view is given in terms of connectors
                           pointing to signals, but it may be useful to have
                           also the dual representation, in term of list of
                           connectors attached to a single signal. This may be
                           obtained by the lofigchain function.

SEE ALSO
       mbk(1), addlosig(3), getlosig(3), dellosig(3), lofigchain(3), locon(3),
       lofig(3), chain(3), ptype(3).




BUG REPORT
       This tool is under development at the ASIM department of the LIP6
       laboratory.
       We need your feedback to improve documentation and tools.






ASIM/LIP6                        October 1, 1997                        LOSIG(3)