gds2Para

Complete Integrated Circuit (IC) Layout Analysis from GDSII Design File to Parasitics Extraction

This IC layout analyzer is written in C++ as part of a wider API for the electromagnetic design validation of VLSI designs. The code design follows a philosophy intended to have the most extensibility and highest level of automation possible for increasingly complex integrated circuits. De#formation from the Graphic Database Stream II (GDSII) file is parsed and stored alongside simulation input information. Once a design is loaded, the information can be written to another GDSII file or analyzed with a full-wave simulation to extract parasitics between ports. An alternate mode of operation allows an interconnect modeling platform (IMP) file to be translated to a GDSII file design. Parasitics are reported through a Standard Parasitics Exchange Format (SPEF) file. Please carefully read this README.md file for installation and usage instructions.

Overview

Simulate (-s) Mode Top-level Flowchart

Packages

Packages	Languages	Description
Algorithms	C++	Useful algorithms including sorting
Cctype	C	Utilities for testing character categorization
Cerrno	C	Utilities for C language error numbers
Cmath	C	Utilities for basic arithmetic operations
Complex	C++	Complex number arithmetic
Cstdio	C	Utilities for C language input/output
Cstdlib	C	Utilities for common C language tasks
Cstring	C	Utilities for manipulating char* data type
Ctime	C	Utilities for dates and timers
Eigen	C++	API for sparse matrix storage
FStream	C++	Plain textext file input and output
GDS2GDT	C	Binary-to-text conversion from .gds to .gdt file
GeoCell	C++	Custom class for GDSII geometric cell
Geometry	C++	Custom class for VLSI design geometry
IOStream	C++	Command line input and output
Limbo	C/C++	API for GDSII file parsing and writing
MakeUtils	Makefile	Makefile utilities that help find dependencies
Math	C++	Extension of math functions from STL
MKL	Fortran/C/C++	Intel libraries for parallel mathematics
Parser-SPEF	C++	API for SPEF file processing
Preprocessor	C/C++	Macros such as assertion with message
ProgramOptions	C++	Easy API to parser command line options
Set	C++	Utilities for sets and multisets
Stack	C++	Utilities for handling LIFO stacks
String	C++	Utilities for easy string handling
ThirdParty	C/C++	Third party packages required
Unordered_map	C++	Utilities for handling associative data types
Unordered_set	C++	Utilities for handling dictionary collection types
Utility	C++	Functions and classes for pairs and swapping
Vector	C++	Collection data types from existing C++ data types

Developers

Please direct all questions, bug reports, and issues relating to this repository to the primary maintainer:

• Michael Hayashi, Graduate Research Assistant, School of ECE, Purdue University

Developers:

• Michael Hayashi, Graduate Research Assistant, School of ECE, Purdue University
• Li Xue, Graduate Research Assistant School of ECE, Purdue University

Many thanks are owed to the project sponsors:

Installation and Usage

1. Clone this respository into your working location
2. Repeat for the Limbo repository, Parser-SPEF repository, and eigen-git-mirror repository
3. Ensure that you are the owner of the files that were downloaded with full read/write/execute permissions
4. Ensure that GNU bison is installed on the machine by seeing if there is an output to the terminal with which bison
5. Modify run commands files depending on the shell indicated by echo $SHELL, substituting <absolute path to Limbo directory> for a valid path when it appears
6. Exit the shell and terminate the connection before logging back in
7. Enter the directory "Limbo/limbo/parsers/gdsii/stream" from the working location
8. Run make CXX=g++ CC=gcc FC=gfortran in this directory
9. Return to working directory and ensure that a new library file named libgdsparser.a exists by running ls -lh Limbo/lib
10. Enter the directory "gds2Para" from the working location
11. (Optional) Add GDSII file to working location
12. Run make in shell to compile executable LayoutAnalyzer
13. Run LayoutAnalyzer --help in shell to view possible modes of operation for this software

License

GNU Public License v2.0 (see LICENSE)