SYNOPSYS

#include <genlib.h>
void GENLIB_LOSIGMERGE(signal1, signal2)
char *signal1, *signal2;

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PARAMETERS

signal1

Name of a signal to be merged

signal2

Name of a signal to be merged

DESCRIPTION

LOSIGMERGE merges the two signals, signal1 and signal2. This function can be used anywhere in the genlib program, but its resultings actions must be known by the user.

1)

If signal1 and signal2 have not been used yet, then the corresponding signal can be later accessed through any of these aliases.

2)

If one of signal1 or signal2 has not been used yet, then all further reference to the not defined name will be made on the same signal than the defined signal.

3)

If both signals exist, then they are merged, and both can be used for reference to the same signal later on.

Since most of the file formats do not allow multiple name for a single signal, the choice is made to keep for disk usage the name that appears in the cell interface, if any. Otherwise, the choice is randomly made by LOSIGMERGE.

Warning

This function allows the user to internally connect two external connectors. This is not a valid disk representation for netlist generated by genlib. The SAVE_LOFIG function will exit if encountering such a situation.
In order to avoid it, either take care not to link such signals, or build all your hierarchy in memory, make sure your block does not have such signals, and call FLATTEN_LOFIG(3) just before saving.

EXAMPLE

#include <genlib.h>
main()
{
        /* Create a figure to work on  */
        GENLIB_DEF_LOFIG("cell");
        /* Define interface *
        GENLIB_LOCON(...
        /* Place an instance */
        GENLIB_LOINS("no2_y" ,"no3" ,"a8_s" ,"a9_s" ,"new_no3_s" ,"vdd" ,"vss" ,0);
        GENLIB_LOINS("no2_y" ,"no4" ,"a12_s" ,"a15_s" ,"no4_s" ,"vdd" ,"vss" ,0);
        GENLIB_LOINS("a2_y" ,"a22" ,"no3_s" ,"no4_s" ,"a22_s" ,"vdd" ,"vss" ,0);
        GENLIB_LOSIGMERGE("new_no3_s", "no3_s");
        /* Save all that on disk */
        GENLIB_SAVE_LOFIG();
}