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# Virtuoso,Custom IC Design,Team SKILL

• #### SKILL for the Skilled: Part 3, Many Ways to Sum a List

In Part 1 and Part 2 of this series of posts, I showed a couple of ways to sum up a given list of numbers. In this post, I want to show a couple of ways to use recursive functions to do this. Recall the sumlist_1a function In a previous posting the function sumlist_1a was defined. (defun sumlist_1a ...
Posted to Custom IC Design (Weblog) by Team SKILL on Tue, Sep 18 2012
• #### SKILL for the Skilled: Introduction to Classes -- Part 5

In the previous SKILL for the Skilled postings, we looked at a pretty good algorithm for solving the Sudoku puzzle. This algorithm is able to find at least one solution of the puzzle if one exists, and is able to detect that no solution exists if that is in fact the case. In this article we look at a...
Posted to Custom IC Design (Weblog) by Team SKILL on Fri, Feb 10 2012
• #### SKILL for the Skilled: Introduction to Classes -- Part 4

In several previous postings we introduced the problem of solving the sudoku puzzle. In Part 1 , we saw the rules of sudoku and a brief introduction to the SKILL++ Object System. In Part 2 , we started solving the problem top-down by implementing the top level function SkuSolve and agreeing to fill in...
Posted to Custom IC Design (Weblog) by Team SKILL on Mon, Nov 14 2011
• #### SKILL for the Skilled: Introduction to Classes -- Part 3

In the previous posting Introduction to Classes -- Part 2 we saw the high level function for initializing, solving, and displaying the sudoku puzzle. (defun SkuSolve (partial_solution) (let ((sudoku (SkuInitialize (SkuNew) partial_solution))) (printf "starting with: \n%s\n" (SkuPrint sudoku...
Posted to Custom IC Design (Weblog) by Team SKILL on Mon, Oct 17 2011
• #### SKILL for the Skilled: Introduction to Classes -- Part 1

In the previous couple of SKILL for the Skilled postings, we looked at some of the features of SKILL++. In fact, we saw local functions, higher-order functions, and lexical scoping. Still another set of features of SKILL++ is called the SKILL++ Object System . This system provides a standardized way...
Posted to Custom IC Design (Weblog) by Team SKILL on Mon, Aug 15 2011
• #### SKILL for the Skilled: Virtuoso Applications of SKILL++

In this posting, I continue looking at applications of SKILL++. In particular, I'll also discuss how to create functions that hold onto their state. I'll use these functions to implement multiple-criteria (cascading) sort predicates. I'll look at ways to sort layout pins counter-clockwise...
Posted to Custom IC Design (Weblog) by Team SKILL on Tue, May 31 2011
• #### SKILL for the Skilled: Continued Introduction to SKILL++

In my previous posting , which provided an introduction to SKILL++, I showed a simple but powerful design hierarchy descent function that has various potential uses. The function is called walkCvHier . As a reminder, here is the SKILL++ code again. 1.1: (defun walkCvHier (cv consume) 1.2: (foreach inst...
Posted to Custom IC Design (Weblog) by Team SKILL on Tue, Jan 25 2011
• #### SKILL for the Skilled: What is SKILL++?

The way SKILL++ deals with functions is a bit different than the way traditional SKILL deals with them. In this posting I'd like to show how to implement a design hierarchy traversal engine in SKILL++ and use it as an introduction to SKILL++. What is SKILL++? SKILL++ is a subset of the SKILL language...
Posted to Custom IC Design (Weblog) by Team SKILL on Tue, Jan 4 2011
• #### SKILL for the Skilled: Making Programs Clear and Concise

The SKILL programming language augments Cadence core tool functionality for Virtuoso and Allegro customers. It is also an important development tool for internal Cadence services organizations as well as Cadence product development groups. We see the value, power, flexibility, and elegance of the language...
Posted to Custom IC Design (Weblog) by Team SKILL on Mon, Nov 8 2010
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