Boxify - General CIF to boxified CIF converter
Boxify is a filter taking any CIF-file as standard input and
generates a CIF-file containing only boxes as basic geometric figure
on standard output. Non-manhatten (Bostonian) geometry is estimated
with boxes. The quality of the estimation is determined by the
resolution in the input geometry. To improve box-estimation the layout
may be scaled with the -s switch. Remember boxes are specified by
length, width and center-point while polygons are specified by
edge-points. Additional features are: 1) ordering of symbols making
definitions appear before calls, 2) separating hierarchy (symbols
contains only calls or boxes, never both). These requirements should
make any CIF-file loadable for simple box-shufflers like WoL. Both
overlapping geometry and zero-area boxes are removed.
WARNING
This program should be used with care and understanding since quite
serious changes are done to the CIF-code.
Options
Boxify options are :
- -s scalemultiplier scaledivider
- is a scaling-factor applied to all points in the layout when writing
the CIF-file. Does not affect scaling in DS.
- -c scalemultiplier scaledivider
- This is the scalefactor written in the DS-command. WOL likes -c 100 2.
- -p scalemultiplier scaledivider
- is a prescaling-factor applied to all points when reading. In this way
box-approximation may be improved. For MOSIS design-rules at least -p
4 1 should be used.
- -n
- Cells are named with user-command: 9. Some editors (like WoL) requires
named cells. The name will be generated as "Cell < number > " where
"number" is generated by the program.
- -N cellname
- Cells are named with user-command: 9. Some editors (like WoL) requires
named cells. The name will be "cellname < number > ".
- -b cellname
- Multiplies all symbol-scaling to coordinates.
- -d usercommand
- Used to remove special usercommands causing problems for your favorite
layout editor. This switch may be applied more than once.
- -o
- Normally coordinate-systems for cells are transformed to (0,0) in lower
left corner. This switch preserves the original coordinate-system.
- -z
- With this switch zero-area boxes are dropped. Otherwise a warning is
issued.
- -h
- Turns off separation of hierarcy including geometry in cells with calls
to other cells.
Examples
For MOSIS design-rules the following command may be used.
boxify -p 4 1 -b -n -c 100 2 < scrules12.cif > scr12.cif
For Bug Reports and Questions
This tool was contributed by Tor Sverre Lande, Dept. of Informatics,
University of Oslo, Norway, bassen@ifi.uio.no
- Email
- lazzaro@cs.berkeley.edu
- Phone
- (510) 643 4005
- SMail
- UC Berkeley / CS Division / 387 Soda Hall / Berkeley CA 94720