by Phil Moorby The Verilog Hardware Description Language has had an amazing impact on the mod em electronics industry, considering that the essential composition of the language was developed in a surprisingly short period of time, early in 1984. Since its introduc tion, Verilog has changed very little. Over time, users have requested many improve ments to meet new methodology needs. But, it is a complex and time consuming process to add features to a language without ambiguity, and maintaining consistency. A group of Verilog enthusiasts, the IEEE 1364 Verilog committee, have broken the Verilog feature doldrums. These individuals should be applauded. They invested the time and energy, often their personal time, to understand and resolve an extensive wish-list of language enhancements. They took on the task of choosing a feature set that would stand up to the scrutiny of the standardization process. I would like to per sonally thank this group. They have shown that it is possible to evolve Verilog, rather than having to completely start over with some revolutionary new language. The Verilog 1364-2001 standard provides many of the advanced building blocks that users have requested. The enhancements include key components for verification, abstract design, and other new methodology capabilities. As designers tackle advanced issues such as automated verification, system partitioning, etc., the Verilog standard will rise to meet the continuing challenge of electronics design.

The IEEE 1364-2001 standard, nicknamed `Verilog-2001', is the first major update to the Verilog language since its inception in 1984. This book presents 45 significant enhancements contained in Verilog-2001 standard. A few of the new features described in this book are: ANSI C style port declarations for modules, primitives, tasks and functions; Automatic tasks and functions (re-entrant tasks and recursive functions); Multidimensional arrays of any data type, plus array bit and part selects; Signed arithmetic extensions, including signed data types and sign casting; Enhanced file I/O capabilities, such as $fscanf, $fread and much more; Enhanced deep submicron timing accuracy and glitch detection; Generate blocks for creating multiple instances of modules and procedures; Configurations for true source file management within the Verilog language. This book assumes that the reader is already familiar with using Verilog. It supplements other excellent books on how to use the Verilog language, such as The Verilog Hardware Description Language, by Donald Thomas and Philip Moorby (Kluwer Academic Publishers, ISBN: 0-7923-8166-1) and Verilog Quickstart: A Practical Guide to Simulation and Synthesis, by James Lee (Kluwer Academic Publishers, ISBN: 0-7923-8515-2).

Verilog and its usage has come a long way since its original invention in the mid-80s by Phil Moorby. At the time the average design size was around ten thousand gates, and simulation to validate the design was its primary usage. But between then and now designs have increased dramatically in size, and automatic logic synthesis from RTL has become the standard design ?ow for most design. Indeed, the language has evolved and been re-standardized too. Overtheyears,manybookshavebeenwrittenaboutVerilog.Myown,coauthored with Phil Moorby, had the goal of de?ning the language and its usage, providing - amples along the way. It has been updated with ?ve new editions as the language and its usage evolved. However this new book takes a very different and unique view; that of the designer. John Michael Williams has a long history of working and teaching in the ?eld of IC and ASIC design. He brings an indepth presentation of Verilog and how to use it with logic synthesis tools; no other Verilog book has dealt with this topic as deeply as he has. If you need to learn Verilog and get up to speed quickly to use it for synthesis, this book is for you. It is sectioned around a set of lessons including presentation and explanation of new concepts and approaches to design, along with lab sessions.

SystemVerilog is a rich set of extensions to the IEEE 1364-2001 Verilog Hardware Description Language (Verilog HDL). These extensions address two major aspects of HDL based design. First, modeling very large designs with concise, accurate, and intuitive code. Second, writing high-level test programs to efficiently and effectively verify these large designs. This book, SystemVerilog for Design, addresses the first aspect of the SystemVerilog extensions to Verilog. Important modeling features are presented, such as two-state data types, enumerated types, user-defined types, structures, unions, and interfaces. Emphasis is placed on the proper usage of these enhancements for simulation and synthesis. A companion to this book, SystemVerilog for Verification, covers the second aspect of SystemVerilog.

XV From the Old to the New xvii Acknowledgments xx| Verilog A Tutorial Introduction Getting Started 2 A Structural Description 2 Simulating the binaryToESeg Driver 4 Creating Ports For the Module 7 Creating a Testbench For a Module 8 Behavioral Modeling of Combinational Circuits 11 Procedural Models 12 Rules for Synthesizing Combinational Circuits 13 Procedural Modeling of Clocked Sequential Circuits 14 Modeling Finite State Machines 15 Rules for Synthesizing Sequential Systems 18 Non-Blocking Assignment ("

This book is the third in a series of books collecting the best papers from the three main regional conferences on electronic system design languages, HDLCon in the United States, APCHDL in Asia-Pacific and FDL in Europe. Being APCHDL bi-annual, this book presents a selection of papers from HDLCon'Ol and FDL'OI. HDLCon is the premier HDL event in the United States. It originated in 1999 from the merging of the International Verilog Conference and the Spring VHDL User's Forum. The scope of the conference expanded from specialized languages such as VHDL and Verilog to general purpose languages such as C++ and Java. In 2001 it was held in February in Santa Clara, CA. Presentations from design engineers are technical in nature, reflecting real life experiences in using HDLs. EDA vendors presentations show what is available - and what is planned-for design tools that utilize HDLs, such as simulation and synthesis tools. The Forum on Design Languages (FDL) is the European forum to exchange experiences and learn of new trends, in the application of languages and the associated design methods and tools, to design complex electronic systems. FDL'OI was held in Lyon, France, around seven interrelated workshops, Hardware Description Languages, Analog and Mixed signal Specification, C/C++ HW/SW Specification and Design, Design Environments & Languages, Real-Time specification for embedded Systems, Architecture Modeling and Reuse and System Specification & Design Languages.