fact that "extract all" does not enumerate cells from bottom up
as I had assumed---The order is roughly bottom-to-top, but cells
re-used in different places in the hierarchy could end up called
before one or more of their own subcells is extracted. Since
this conflicted with the preparation of the substrate in each
extracted subcircuit, I changed the method to enumerate cells so
that it is properly bottom-to-top. Also, methods were added to
"extract" (incremental), "extract cell", and "extract parents"
to ensure that the substrate is prepared on all subcells before
extraction.
connections through the substrate as the same node, and so will
not force different nodes names on the soft connection to be
unique. This should probably be selectable behavior. However, as
written, the "extract" command will always merge soft connections,
so giving them unique names just causes problems with "extract".
behave as one would expect; e.g., "cellname self" returns the name
of the currently edited cell if nothing is selected; "cellname
rename <name>" renames the currently edited cell to <name>.
Modified the "extract" command so that it will not extract a cell
named "(UNNAMED)" but will insist that the cell must be given a
proper name, much like the "writeall" command does.
to eliminate all redundant names resulting from redundant labels.
Changed the behavior of "goto" so that it will find local names with
slashes, which are the result of using "flatten". A hierarchical
search is done first, as before, but on failure to find a subcell
component, the local cell is searched for the verbatim name.
statements in the .ext file output to those that mark a port as
equivalent to the node name used elsewhere in the file. This
limits unnecessary output of "equiv" statements that can bog down
ext2spice and other commands that use the .ext file contents.
for sticky labels making connections through the hierarchy. This
is only needed for some annoying layouts that put point-size labels
with no connecting geometry in cells, and causes magic to spent
excessive amounts of time searching through labels for any layout
that has lots of labels.
could have multiple ports of the same name. This problem had been
worked over before, but there was an indpendent mechanism producing
the same result for a completely different reason, caused by subcells
being much larger than the cookie-cutter extraction method's extraction
regions. Solved by tracking port names in a hash table and preventing
re-use. (2) ext2spice was producing "no such node" errors; like (1)
this had been previously worked on, and like (1) this mechanism was
independent. Problem came from not passing -1 to extHierSubstrate for
the non-arrayed dimension of a 1-dimensional array. Also: Removed
the word "fatal" from extraction error reporting, as nearly all
extraction errors are entirely benign. This should clear up confusion
among alarmed end-users.
only at the time of running the command "load". But cells are generally
loaded only on an as-needed basis, so the dereferencing option must be
saved as a flag in the cell and honored whenever its subcells are expanded
or otherwise read at a later time.
rid of redundant port entries in subcircuits. There is still an outstanding
issue as to whether nodes and connections need to be recursively iterated
to the hierarchy bottom. The current fix corrected the test case. Also,
added a "-dereference" option to the "load" command to revert to the
original behavior of using only search paths from "addpath" when searching
for files to load.
function that was available in versions 7.1 and earlier that
allows the use of the command "erase errors" to remove DRC error
paint (only when the DRC checker is off, of course).
Tim Edwards