Superscalar vs. superpipelined machines

  • Authors:
  • Norman P. Jouppi

  • Affiliations:
  • Digital Equipment Corporation, Western Research Laboratory, 100 Hamilton Avenue, Palo Alto, CA

  • Venue:
  • ACM SIGARCH Computer Architecture News
  • Year:
  • 1988

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Abstract

The performance and implementation cost of superscalar and superpipelined machines are compared. Superscalar machines can issue several instructions per cycle. Superpipelined machines can issue only one instruction per cycle, but they have cycle times shorter than the time required for any operation. Both of these techniques exploit instruction-level parallelism, which is often limited in many applications. Superpipelined machines are shown to have better performance and less cost than superscalar machines.