time warnings and errors. Removed the "-lazy" option from the
Tcl load command, which is not needed when the stubs libraries
are compiled in correctly, and which causes issues on some
systems (e.g., Mac OS). Thanks to Matt Guthaus for the patch.
for subcircuits (.subckt ... .ends pair with cellname and pin names
and pin order, but no contents) are automatically treated as black-
box circuits if found and if the "-blackbox" option is passed to the
"lvs" (scripted) command. The "equate pins" command can be used
outside of a comparison to force two circuits (black-box or
otherwise) to be matched by pin name (if not a black-box circuit,
then this is a provisional name match, as a circuit comparison will
order based on connectivity first, not pin names). So two sets of
black-box circuit libraries can be used as long as their pin names
match. One hack added to ignore the "!" at the end of global names
when comparing pin names for matching. Otherwise, pin names must
compare by case-insensitive string match.
include calculations of effective width due to the addition of
width of multiple device instances in parallel. The original
behavior of splitting all "M=" devices into individual instances
has been effectively inverted, instead combining all parallel
devices of the same class into one, with multiple property
records for devices with non-matching properties (e.g., width,
length, etc.). Property matching combines devices with different
"critical properties" (e.g., FET gate width) if these are defined
in the setup using the "property merge" command.
Not yet done: Matching of multiple property records when
critial properties are not defined, handling of critical properties
that combine in parallel instead of simple addition, handling of
devices that combine in series, and the combination of non-critical
properties (e.g., source and drain area, although these are usually
removed from matching).
based on properties that can be traded with number of devices,
such as MOSFET width, by merging. This initial implementation
is somewhat limited, only dealing with properties that merge
by summing. Only devices that do not match at all in the other
circuit will be considered for merging. The feature includes
a command option "property ... merge ..." that allows control
over which devices can and cannot be merged.
variables to iterate over hash table contents. This led to the
inability to nest hash table iterators. Fixed by defining a
wrapper structure that holds the actual hash table plus the size
and iterator indexes. Not only does this solve the nesting
problem, but it also avoids the need to pass the hash table size
on every call, and that reduces the number of ways a hash table
subroutine can go wrong (e.g., cannot access the table out of
bounds simply by passing a size that is larger than was used to
initialize the table).
comparisons between, duplicate cells (cells with the same netlist
that may have more than one name in a circuit, or which for some
reason appear with the same name more than once in a netlist).
Added more checks to the list prematching, which prevents various
troubles with cells having a mismatched hierarchy. Added a
command option to "flatten class" to flatten instances only within
a specific cell. Corrected one error in the pin matching routine.
Added a check in the pin matching routine to look for pins that
have been found to be no-connects after cleaning up the pin lists
of the children of that cell.
Tim Edwards