a LEF macro that has parentheses around the coordinates. Weirdly,
this is requires by the LEF/DEF spec, but is rarely if ever seen
in actual LEF files. Go figure.
because otherwise all pins will flag metal-to-obstruction spacing
within the cell if the cell is wide enough that the obstruction
layer satisfies the width requirement for the rule. It is too
complicated to try to find specific places where the wide spacing
might not be needed. Potentially this could be a problem for
technologies that define a number of graded wide-spacing rules,
as the largest-width rule is always used now by "lef write -hide",
and the largest-width rule could theoretically allow enough space
to route through, which would cause a short that cannot be
detected. That would be a pathological case that may not show up
in practice.
labels by expanding a zero area label rectangle, but then if "select
chunk" returns nothing, it sets the area to the zero area label
rectangle instead of the expanded one that it just created. This
is the reason that "lef write" is producing pins with no geometry
in the LEF file output.
Conflicts:
VERSION
Merged recent changes from master back into bplane, as the efficiency of
bplane for doing extraction on large layouts is unquestionably better.
Fixed the implementation of DBMoveCell() for bplane. Corrected an error
in the bplane version of dbScaleCell() that enumerates cell uses but
does not free the list.
as an optional argument (which it is), and so defaults were not
applied, potentially leading to the wrong number of rows/columns in
a generated via if ROWCOL is not present in the DEF file.
of the pin port geometry and using those areas to create the
spacing between them and the obstruction layer. Otherwise, the
existing method used different databases (source vs. flattened) to
find the pin area, and they did not always agree on the exact
dimensions, leading to spacing errors within the LEF view.
Conflicts:
VERSION
calma/Depend
cif/Depend
cmwind/Depend
commands/Depend
database/Depend
dbwind/Depend
debug/Depend
drc/Depend
ext2sim/Depend
ext2spice/Depend
extflat/Depend
extract/Depend
garouter/Depend
gcr/Depend
graphics/Depend
grouter/Depend
irouter/Depend
lef/Depend
lisp/Depend
mzrouter/Depend
netmenu/Depend
plot/Depend
plow/Depend
resis/Depend
router/Depend
select/Depend
sim/Depend
tcltk/Depend
textio/Depend
tiles/Depend
utils/Depend
windows/Depend
wiring/Depend
Merged recent changes from master branch into bplane branch. Testing the
bplane implementation which has about a 5x improvement in extraction times
for large layouts, which is significant enough to move ahead with the bplane
implementation; however, the bplane implementation has not been thoroughly
vetted yet, so it will remain a branch until such time that it has been
validated.
multiple ports; also, when using the "-hide" option, the obstruction
area is computed from layer geometry, not from the bounding box.
Still left to do: Ensure minimum width on pins, and remove slivers
of obstruction that are below minimum width.
Conflicts:
VERSION
database/DBcellsrch.c
database/DBconnect.c
extract/ExtInter.c
lef/Depend
utils/Depend
Updated bplane branch with all changes to master since the bplane branch
was last modified.
from the cifoutput section, NOT the cifinput section. This change
underscores the point that LEF and DEF formats define mask data,
and therefore all LEF and DEF routines should be using the CIF
input/output methods and layers. That is a major code change;
meanwhile, getting via layer values from the cifoutput parameters
is slightly more reliable than using cifinput, since there is good
reason to use templayers to read vias, and that sort of indirection
makes it difficult to determine a simple relationship between a
LEF cut layer and a magic contact.
order of layers than specified in the LEF/DEF spec. It is not clear
whether this is common practice, or a bug in the tool that produced the
DEF file that prompted this change. NOTE: The "grow" function applied
in this case should be replaced by the actual GDS input rule sequence,
that includes the grow and shrink merge. Otherwise, vias read from
DEF files do not match the layout from those read from GDS, even though
the mask layers represented by the layouts are the same.
distributed installations, where the immediate installation location
is different from the final installation location, but in the case
where it is not desirable to put the entire install hierarchy as a
subdirectory of DESTDIR.
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.
the right argument type (float, not int). Otherwise all resistances
from extresist come out zero when doing "ext2spice extresist on"
and "ext2spice hierarchy on". Also changed the format of the resistance
in the SPICE output to type float, since values are in standard units of
ohms, and rounding to the nearest ohm seems excessively coarse-grained.
an existing cell. If the existing cell has labels but the labels
are defined as point labels (no rectangle defined using specific
layer-purpose pairs), then the LEF macro's port geometry will be
used for the labels. Because the GDS file can define label sizes
and fonts, which the LEF file cannot, but because the LEF file may
define multiple rectangles per port, the original point label is
given the first port rectangle from the LEF file, while the
remainder of the labels in the LEF file generate new non-rendered
labels in the cell.
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.
by FIXED_BBOX derived from GDS and the new "boundary" cif input
rule, then the bbox property values take precedence over the
extent-of-geometry bounding box.
is placed over multiple types. This causes SelectChunk() to fail
and the pin will have no geometry output in the LEF file. To avoid
this, the area of the label is always painted into the select cell
so that if SelectChunk() fails, the label area still exists with
the label tile type.
it only complains about (i.e., issues an error message) ports with
the same index but different text, indicating a read port number
collision and a true error.
was previously (and erroneously) lumped with PLACED and FIXED which
take a position argument afterward. Note that this fix allows the
DEF file to be read without error but does not have the (presumably
desired) behavior of parsing SITE information from the LEF file and
ROWS information from the DEF file and giving each unplaced component
an arbitrary but legal position. That would require a significant
amount of additional coding work.
while reading DEF. To preserve names as much as possible, such
names are now kept. To avoid problems, EFbuild.c and ext2hier
behavior has been changed to only parse entries in a .ext file as
instance arrays if the array notation follows the specific syntax
of [ax:bx:cx][ay:by:cy], letting all other uses of brackets pass
through unaffected.
sure if this is the best policy. The brackets should be okay
but interfere with ext2spice when it reads them from the .ext
file and decides that they refer to arrays. May be a better
way to handle this.
Tim Edwards