this limited ports to 16384, which seemed reasonable at the time.
However, the sky130_sram_macro layouts connect power and ground in a
way that when coupled with "extract unique" can generate tens of
thousands of ports and overrun the bit field, showing that automation
can do the unexpected. The solution was to split out the port number
from the label record as its own 32-bit value.
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.
rectangle. Likewise, this also fixes an unexpected result when
doing "spliterase" on a zero-area rectangle (which does not cause
a segfault, but is not what one would want magic to do).
an optional extra argument to the "select" command that can be used
to select labels by glob-style matching; e.g., "select area labels
VSS*" or "select less area labels *_1". This will help in managing
labels after flattening a standard cell design; e.g., by using
"select less area labels */VDD".
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.
require that an edit cell be defined. This stops a lot of commands
from failing on non-writeable cells. There really should not be a
concept of "non-editable" cells at all, just non-writeable ones.
that can be used to force renaming of a read-only cell. The
action revokes the read-only status of the cell and removes any
GDS filename and pointers from the cell's properties. This can be
used to swap out a library cell in a layout for a custom version,
by first forcing a rename of the cell, and then resetting the
filepath of the cell and flushing.
is not necessary that the target cell not exist. That allows a
layout to be flattened into a destination in pieces. Also found
that the "flatten" command never frees memory for the CellUse it
creates for the copy, so fixed that as well.
name conflict and renames a cell, the name was not pointing to
the new name and immediately caused a crash condition. However,
it got to that point by believing that cell "path/x" and "path/x.mag"
were different files. The name was stripped of the extension but
the full file path was not, causing the confusion.
the "getcell" command) so that the "parent" and "child" arguments
will accept the standard syntax for coordinates used by most other
commands (will accept SI units or trailing suffix i/l for internal
or lambda units).
in which if a cell is read from GDS that has the same name as a cell
in memory, then the cell in memory is renamed to keep all cell names
unique in the database.
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.
worded warning if an abstract cell view is written to GDS.
Corrected the "cellname ... writeable" command to allow an
overrride of the read-only status of a cell. That change had
been made before but apparently got reverted by the recent
rollback.
This reverts commit 8b9c47c3ef.
Reverting back to the state before messing with the substrate extraction
code. All of the substrate extraction code is now in a separate branch.
on a non-writeable cell. While technically valid, that just means
that nobody can make temporary edits on the cell in memory, which is
useful in many applications. A slight quirk of the "cellname" command
is that if applied to the cell currently in the layout window, it is
not possible to make the cell show as edited and editable until leaving
and re-entering the cell.
output when using the "port ... index" or "port ... name" to query
values from a specific port by name or index. The "readspice"
script has been modified to use this option to prevent unnecessary
error output from the script as it searches a layout for possible
name matches to a SPICE netlist subcircuit pin list.
that the intersection of (A and-not B) can be found. This and the
(A and B) version give a large amount of capability like the cifoutput
operators available as command-line commands. Also: Fixed the new
"drop" command so that it properly redisplays and runs DRC after
executing, and modified the behavior so that the dropped material
is clipped to the area of the selection.
into subcells in a hierarchy. The intent is to use this in
conjunction with the "select intersect" command option added
yesterday to add deep nwell into the cells containing the devices
that need it.
that the behavior is to pare down any existing selection by removing
any parts of it that do not intersect the layer specified on the
command line. This is generally more useful than the previous
method, as the intended purpose is to intersect a number of layers
against one (e.g., all transistors intersecting deep nwell).
addition to "-list", where the list of layers returned is more
like the (recently extended) non-listing method where each type
is followed by a list of cell names in which that type is found
(within the selection area).
that contain the selected paint. Previously, all cells inside the
area of the selection box would be printed, which is completely
wrong, and can lead unexpectedly to thousands of cell instance
names being printed out.
extra option "-default" that allows defaults to be set for any
label property other than text or port-related properties.
Subsequently, the command "label <text>" will apply the given
defaults to the label. This allows a simpler way to create
rendered labels from the command line without remembering all of
the arguments to the extended "label" command.
The previous behavior was to generate hierarchical names for all
labels when copying contents of subcells. This is "safe" for
copying selections without accidentally shorting things through
labeling, but it can make a mess of the selection. Options are
now "select do labels" for the existing behavior, "select no labels"
to not show any labels, and "select simple labels" to show only the
root name of labels in subcells.
GDS_FILE property in the same way that it handles changes to the
FIXED_BBOX property, by setting or clearing the associated flag
bit in the cell. Otherwise, it becomes impossible to make a
cell writeable, as it always has some belief that it is still
attached to a specific GDS file. Corrected an error in the
"gds" ("calma") command parsing that switched the callbacks for
the "noduplicates" and "nodatestamp" options.
of an instance with double-escaped brackets if the instance name
contains brackets. This then undermines the use of the backslash
escape and causes the interpreter to raise an error instead of
printing the name.
it as a single value "flags" (unsigned char) with meaningful flag
names. Added new option "-fail" to the load command to allow
magic to fail on loading a cell that does not have a corresponding
file rather than the default action of creating a new cell. Added
a flag for the "-quiet" option so that behavior on "-fail" can be
done quietly.
magic database derived layout of a cell that declares GDS_FILE
but for which the GDS file referenced cannot be found or read.
This will produce an incomplete GDS file instead of an apparently
good and complete GDS file that actually contains bad data. Also:
Added new command "random" that allows a random seed to be set,
for use with the GDS output when writing a full dump of a GDS
file. Otherwise, the output prefixes are always the same, which
defeats the purpose of adding the random prefix.
to stop the search whenever a cell is not found. Used this to implement
a new option for GDS writes, "gds undefined allow|disallow" (default
"disallow") controls whether or not GDS with undefined references will
be allowed to be written. Similarly affects CIF and LEF writes, extraction,
and DRC (when running "drc check" from the top).
restricted to its original intent, which is to replace the long name
formed from the plane short name and the "minfinity" coordinate.
This avoids issues with conflicting substrate names derived from a
real layer such as pwell. Also, the global substrate node name now
returns the variable name without the "$" in front if the variable
has not been set to anything. This avoids potential syntax errors
in the netlist.
of input cells on a per-cellname basis, using glob-style pattern
matching. This is probably the best way to deal with 3rd-party vendor
GDS with unfortunate practices like dividing devices up among cells in
a hierarchy, even though it comes across as a bit of a hack solution.
tech file format "version" section. This can be used to specify the
version of magic that must be used to be compatible with the tech file.
This effectively supercedes the technology version number. (2) Changed
the behavior of "make" to set the version and revision numbers on doing
"make" instead of "configure". This allows the version to update
correctly after doing a "git pull" followed by "make" without doing
"configure" in between. (3) Fixed a couple of issues that were flagged
as compile-time warnings.
Tim Edwards