ISPD02 IBM-MS Mixed-size Placement Benchmarks
This slot includes mixed-size placement benchmarks for CAD research.
The newer IBM-MSwPins mixed-size benchmarks with non-trivial cell/macro
pin-locations and non-trivial macro aspect ratios are available
of the Benchmarks
These benchmarks have large placeable macros and many fixed pads
distributed through the periphery. The benchmarks are derived from the ISPD-98 (IBM)
circuit benchmarks. We converted the netlists into the Bookshelf placement format
and added placement-related information. The original descriptions
specify cell areas, but not their dimensions. We define rows of
16. Cell sites in all rows have width 1. Cell widths were computed by
dividing cell areas by row height (16). When the width of a cell
exceeded a threshold, we upgraded such a cell to the status of a
multi-row macro with aspect ratio 1. The height of such a macro is
computed by rounding the square-root of the area to the closest integer
multiple of row height (16). The width is computed by dividing cell
area by cell height and rounding the result to the closest integer
number of cell sites. All designs have a whitespace of 20% and their
pads (marked in the original IBM netlists) were
randomly placed near the perimeter of the core area.
IBM-MSwPins benchmarks , an improved version of these original IBM
mixed-size placement were released in ICCAD 2004. The IBM-MSwPins benchmarks
are different from these IBM-MS benchmarks because the macros have non-trivial
between 0.5 to 2.0 and the pins of all cells and macros are spread around the
boundaries of respective cell/macro.
Disclaimer: If you are using these
in a publication or a technical report, please cite the following
sources  and  in addition to the URL. They describe how the
There are 18 benchmarks, ibm01-ibm18, available in Bookshelf
and LEF/DEF format.
 S. N. Adya, I. L. Markov, "Consistent
Placement of Macro-Blocks using Floorplanning and Standard-Cell
Placement", International Symposium of Physical Design (ISPD), San
 S. N. Adya, I. L.
Markov, "Combinatorial Techniques for
Mixed-size Placement", to appear in ACM Trans. on Design Automation of
Electronic Systems, 2004
 S. N. Adya, I. L. Markov, "Fixed
Outline Floorplanning Through Better Local Search", International
Conference of Computer Design (ICCD), Austin, USA, September 2001.