routine attempts to rescale the contents of the top-level cell after
moving forward in the GDS to find a cell that was used before it was
defined, if reading that cell caused the scale to change. However,
the numerator and denominator were reversed, causing the scaling to
be the inverse of what it should have been.
Ghazy) to read pin uses from a DEF file, including the three types
that are not defined by the LEF format (go figure). Expanded the
bitmask of label flags to include the additional use types. Also
shifted the label flag bitmask up to make additional room for more
port number, as there is no point in having unused bits in the
bitmask.
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.
occurrence of the label to place the box on. This can be used with
"findlabel -glob <name>" to get a list of labels and determine the
length of the list, and then iterate through each occurrance of the
label in the edit cell.
disagreements between parent and child cells on GDS generation for
templayers, as these layers are not output; any resulting differences
showing up eventually on an output layer will be reported.
bloat-all, that was resetting flags in the entire plane within the
callback for each tile processed. This would push DRC run-times from
minutes to hours. Also corrected another, much more minor, efficiency,
in which the connection mask was generated in the callback routine
for each tile, instead of calculating before the plane search and
passing the mask to the callback function in the client data.
hierarchical processing from CIFGenSubcells() and CIFGenArrays(), and to
avoid certain operators that are useless and harmful when applied
hierarchically; namely squares, slots, bbox, boundary, and net.
the handling of subcell instances generally. Previously it would check
the interaction between neighboring cells in an array without regard to
any material in the parent cell which might remove those errors;
consequently, the array would have to be DRC clean by itself in order for
the parent cell to show as DRC clean. The array check has been moved
inside the DRCInteractionCheck() routine, so that it runs only where
arrayed instances do not interact with anything else. Within interaction
areas, the area is flattened and checked, so the array check is not
needed.
unique" code. It was using DBEraseLabelsByContent() which would
erase all matching labels, and could potentially erase labels that
were still remaining on the list being processed, causing a segfault.
Also corrected minor errors identified by valgrind during debugging
the above-referenced problem.
Instead of a 6-character suffix generated randomly, the 6-character
suffix is generated by a hash algorithm from the device parameters.
If the cell parameters are changed, then the cell itself changes.
If the instance name was default (derived from the cell name) then
the instance name changes accordingly. The result is that there
cannot be two (auto-)generated cells with the same parameters but
with different cell names.
which was failing to clear tiles in the layout of the "processed" state,
leading to unpredicatable results if the same layout layer is used in
a subsequent CIF operation.
from child cells, which was incorrectly descending all the way down
into the hierarchy; not only can this produce the incorrect result
but it also wastes time searching cells that don't need to be
searched.
are interpreted in the dimensions used in the cifoutput section rather
than always in centimicrons (otherwise, rules at, say, 5nm cannot be
represented in the DRC section).
read". While "lef read" normally annotates existing layout, this
option ensures that no additional cells are created from macros in
the input LEF file. (2) Added a check on the "Input off lambda grid"
warning during CIF/GDS input such that it is not repeated once issued,
as it tends to be output many times when it occurs.
from the layout window. The main reason for this is to keep the
box out of the image when doing "plot svg". The "plot" command was
also modified to always do a plot of the entire cell in the active
layout window if the box is not present.
bounding box of the selection (somewhat unuseful, especially as the
result gets absorbed by the tag callback), and "box select", which
sets the cursor box to the bounding box of the selection (much more
useful). Also corrected the "port" command so that the command
"port make" will search only for non-port labels.
command when annotating an existing layout from a LEF database, if
there is a port in the layout that is shadowed by a label with the
same name that is not a port.
device layer type to describe the extraction for both a regular FET
and an extended-drain device. Note that the current code still
requires that the extended-drain device be declared first, and does
not check for this or attempt to reorder if incorrect.
easier to scan through a cell's ports. Used that capability in the
"readspice" script to handle case sensitivity problems, and to find
labels that are not ports and force them to be ports to match the
reference netlist.
Tcl_Alloc() and Tcl_Free() because Tcl_Alloc() uses (unsigned int)
for the argument type and therefore limits memory allocations to
what can fit in 32 bits. Using the system malloc(size_t) should not
cause any issues.
Tim Edwards