skip to main content
article
Free Access

Improved instruction formation in the exhaustive local microcode compaction algorithm

Published:01 December 1984Publication History
Skip Abstract Section

Abstract

An algorithm has been developed to compact the micro-operations of horizontal microcode into optimal segments of straight-line microinstructions. The Quine modified (QM) algorithm generates solutions for 24 micro-operations in 2 sec. of VAX processing time. It generates a small number of solutions. A Pascal program that models the algorithm has been developed. A proof that the algorithm produces a minimal solution is given.

References

  1. 1 Agerwala, "Microprogram Optimization: A Survey," IEEE Trans. Comp., vol. C-25, Oct. 1976.]]Google ScholarGoogle Scholar
  2. 2 R. Atkins, "An Automatically Retargetable Microcode Compiler," in Entity-Relationship Approach to Software Engineering, (eds.) Carl G. Davis, Sushil Jajodia, Peter A. Ng, Raymond T. Yeh, Sept. 1983.]]Google ScholarGoogle Scholar
  3. 3 S. Davidson, D. Landskov, B. Shriver, and P. Mallett, "Some Experiments in Local Microcode Compaction for Horizontal Machines," IEEE, 1981.]]Google ScholarGoogle Scholar
  4. 4 D.J. Dewitt, "A Control Word Model for Detecting Conflicts Between Micro-operations," Proc. 8th Workshop on Microprogramming, Oct. 1975.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  5. 5 S. Even, Graph Algorithms, Computer Science Press, 1979.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  6. 6 J.A. Fisher, "Trace Scheduling: A Technique For Global Microcode Optimization," IEEE Trans. Comp., vol. C-30, no. 7, July 1981.]]Google ScholarGoogle Scholar
  7. 7 Husson, Microprogramming: Principles and Practice, Englewood Cliffs, NJ: Prentice-Hall, 1970.]]Google ScholarGoogle Scholar
  8. 8 R.L. Kleir and C.V. Ramamoorthy, "Optimization Strategies for Microprograms," IEEE Trans. Comp., vol. C-20, July 1971.]]Google ScholarGoogle Scholar
  9. 9 R.L. Kleir, "A Representation for the Analysis of Microprogram Operation," Micro-7, 1974.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  10. 10 D. Landskov, S. Davidson, B. Shriver, and P. Mallett, "Local Microcode Compaction Techniques," ACM Computing Surveys, vol. 12, no. 3, pp. 2651-2694, Sept. 1980.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  11. 11 A. Nijenhuis and H. Wilf, Combinatorial Algorithms for Computers and Calculators, Academic Press, 1978.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  12. 12 D. Patterson, K. Lew, and R. Tuck, "Toward an Efficient, Machine-Independent Language for Microprogramming," Proc. 12th Annual Microprogramming Workshop, pp. 22-35, November 1979.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  13. 13 R. A. Mueller, Automated Microcode Synthesis, UMI Research Press, 1984.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  14. 14 M. D. Poe, "Heuristics for the Global Optimization of Microprograms," IEEE, 1980.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  15. 15 B.R. Rau, C.D. Glaeser, and R.L. Picard, "Efficient Code Generation for Horizontal Architectures: Compiler Techniques and Architectural Support," Proc. 9th Annual Symposium on Computer Arch., April 1982.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  16. 16 M. Ruschitzka and R. Fabray, "A Unifying Approach to Scheduling," Comm. of the ACM, vol. 20, no. 7, July 1977.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  17. 17 R.J. Sheraga and J.L. Gieser, "Experiments in Automatic Microcode Generation," IEEE Trans. Comp., vol. C-322, no. 6, June 1983.]]Google ScholarGoogle Scholar
  18. 18 M. Tokoro, E. Tamura, and T. Takizuka, "Optimization of Microprograms," IEEE Trans. Comp., vol. C-30, July 1981.]]Google ScholarGoogle Scholar
  19. 19 M. Tokoro, E. Tamura, K. Takase, and K. Tamuru, "An Approach to Microprogram Optimization Considering Resource Occupancy and Instruction Formats," Micro-10, 1977.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  20. 20 M. Tokoro, T. Takizuka, E. Tamura, and I. Yamaura, "A Technique of Global Optimization of Microprograms," Micro-11, 1978.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  21. 21 M. Tsuchiya and M. Gonzalez, "Toward Optimization of Horizontal Microprograms," IEEE Trans. Comp., vol. C-25, no. 10, Oct. 1976.]]Google ScholarGoogle Scholar
  22. 22 M. Tsuchiya and M. Gonzalez, "An Approach to Optimization of Horizontal Microprograms," Micro-7, 1974.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  23. 23 G. Wood, "On the Packing of Micro-operations into Micro-instruction Words," Proc. 11th Workshop on Microprogramming, Niagra Falls, NY, Sept. 1978.]] Google ScholarGoogle ScholarDigital LibraryDigital Library
  24. 24 S. Yau, A. Schowe, and M. Tsuchiya, "On Storage Optimization for Horizontal Microprograms," Micro-7, 1974.]] Google ScholarGoogle ScholarDigital LibraryDigital Library

Index Terms

  1. Improved instruction formation in the exhaustive local microcode compaction algorithm

      Recommendations

      Comments

      Login options

      Check if you have access through your login credentials or your institution to get full access on this article.

      Sign in

      Full Access

      • Published in

        cover image ACM SIGMICRO Newsletter
        ACM SIGMICRO Newsletter  Volume 15, Issue 4
        MICRO 17: Proceedings of the Seventeenth Annual Microprogramming Workshop
        Dec. 1984
        302 pages
        ISSN:1050-916X
        DOI:10.1145/384281
        Issue’s Table of Contents
        • cover image ACM Conferences
          MICRO 17: Proceedings of the 17th annual workshop on Microprogramming
          December 1984
          325 pages

        Copyright © 1984 Author

        Publisher

        Association for Computing Machinery

        New York, NY, United States

        Publication History

        • Published: 1 December 1984

        Check for updates

        Qualifiers

        • article

      PDF Format

      View or Download as a PDF file.

      PDF

      eReader

      View online with eReader.

      eReader
      About Cookies On This Site

      We use cookies to ensure that we give you the best experience on our website.

      Learn more

      Got it!