Microprogrammed associative instructions: results and analysis of a case study in vertical migration

  • Authors:
  • B. Albert;A. Bode

  • Affiliations:
  • Universität Erlangen-Nürnberg, Erlangen, West-Germany;Universität Erlangen-Nürnberg, Erlangen, West-Germany

  • Venue:
  • ACM SIGMICRO Newsletter
  • Year:
  • 1983

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Abstract

The microprogrammed implementation of associative instructions on conventional microprogrammable computers with address-based memory-access is introduced as "vertical processing". The implementation on the processors of the EGPA-multiprocessor project is reported as well as runtime comparisons of the microprograms with equivalent HLL-programs. The contribution of the factors vertical migration and associativity to the observed overall speedup is described. Finally, a detailed analysis of the underlying microarchitecture and the handcoded microprograms is given in view of local and global compaction techniques.