OpenMPL

OpenMPL stands for open multiple patterning lithography framework.

Pre-requisite

• Limbo: require LIMBO_DIR environment variable to the path where Limbo is installed. OpenMPL is based on Limbo library.

How To Compile

$ git clone https://github.com/wadmes/OpenMPL.git
$ cd OpenMPL/src/mpl/
$ make

Here are some optional parameters when make :

# default DBG (debug) is off
DBG = 0
# default GPROF is off, used to enable runtime profiling
GPROF = 0
# default GUROBI is off 
GUROBI = 0
# default LEMONCBC is off 
LEMONCBC = 0
# default CSDP is off 
CSDP = 0

Features

• Contact or metal layer decomposition
• Stitch insertion supported
• Support 3 or 4 coloring
• Density control
• Multi-threading
• Small memory usage
• Multiple algorithms: ILP (Gurobi or Lemon CBC), SDP (Csdp API), LP (Gurobi API)
• Dancing Links (own implementation)

The Csdp API used in OpenMPL has been modified and built for threading safety at high level.

How To Execute

$ cd bin/
$ ./OpenMPL

A table of options :

-help (false)                toggle printing help message
-in                          input gds file name
-out ()                      output gds file name
-coloring_distance (0)       a floating point number indicating number of coloring distance in nanometer
-color_num                   an integer indicating number of masks (colors) < 3|4 >
-simplify_level (3)          an integer indicating graph simplification level < 0|1|2|3 >
-thread_num (1)              an integer indicating maximum thread number
-path_layer                  an integer indicating layer for conflict edges
-precolor_layer              an integer indicating layer for pre-colored patterns
-uncolor_layer               an integer indicating layer for coloring
-algo (BACKTRACK)            algorithm type < ILP|BACKTRACK|LP|SDP >
-shape (RECTANGLE)           shape mode < RECTANGLE|POLYGON >
-verbose (false)             toggle controlling screen messages
-stitch (false)              toggle controlling stitch insertion, default is false
-dbg_comp_id (4294967295)    debug component id
-use_stitch 				 use stitch to avoid conflict
-gen_stitch					 generate stitch candidate

One exmaple : /bin/run.sh.

Possible Compiler Problems

• default CFLAGS of boost and gurobi are different in newest version

• downgrade the boost version

• SimpleMPL.cpp:461:5: error: ‘graph_simplification_type’ has no member named ‘set_isVDDGND’
  

  • checkout to stitch branch in your limbo directory

License

• BSD-3-clause License [LINK]

Authors

Name	Affiliation	email
Yibo Lin	CSE Dept, Peking University	[email protected]
Bei Yu	CSE Dept, CUHK	[email protected]
Qi Sun	CSE Dept, CUHK	[email protected]
David Z. Pan	ECE Dept, UT Austin	[email protected]
Wei Li	CSE Dept, CUHK	[email protected]