The biannual Formal Methods in Computer Aided Design conference (FMCAD 2000)is the third in a series of conferences under that title devoted to the use of discrete mathematical methods for the analysis of computer hardware and so- ware. The work reported in this book describes the use of modeling languages and their associated automated analysis tools to specify and verify computing systems. Functional veric ation has become one of the principal costs in a modern computer design e ort. In addition, verica tion of circuit models, timing, power, etc., requires even more eo rt. FMCAD provides a venue for academic and - dustrial researchers and practitioners to share their ideas and experiences of using discrete mathematical modeling and veric ation. It is noted with interest by the conference chairmen how this area has grown from just a few people 15 years ago to a vibrant area of research, development, and deployment. It is clear that these methods are helping reduce the cost of designing computing systems. As an example of this potential cost reduction, we have invited David Russino of Advanced Micro Devices, Inc. to describe his veric ation of ?oating-point - gorithms being used in AMD microprocessors. The program includes 30 regular presentations selected from 63 submitted paper

The FM 8501 microprocessor was invented as a generic microprocessor somewhat similar to a PDP-11. The principal idea of the FM 8501 effort was to see if it was possible to express the user-level specification and the design implementation using a formal logic, the Boyer-Moore logic; this approach permitted a complete mechanically checked proof that the FM 8501 implementation fully implemented its specification. The implementation model for the FM 8501 was inadequate for industrial hardware design but the effort was an important step in the evolution to the design verification methodology now employed by the author.
The original version of this monograph was submitted as a dissertation at the University of Texas at Austin under the advisorship of R. Boyer and J. Moore.