Dual precision IEEE floating-point multiplier

Guy Even, Silvia M. Mueller, Peter Michael Seidel

Research output: Contribution to journalArticlepeer-review


A new algorithm for computing IEEE-compliant rounding is presented, called injection-based rounding. Injection-based rounding is simple and facilitates using the same rounding circuitry for different precisions. We demonstrate the usefulness of injection-based rounding in a design of an IEEE floating-point multiplier capable of performing either a double-precision multiplication or a single-precision multiplication. The multiplier is designed to minimize hardware cost by using only a half-sized multiplication array and by sharing the rounding circuitry for both precisions. The latency of the multiplier is in single-precision two clock cycles and in double precision the latency is three clock cycles, where each pipeline stage contains roughly 15 logic levels.

Original languageEnglish
Pages (from-to)167-180
Number of pages14
JournalIntegration, the VLSI Journal
Issue number2
StatePublished - Sep 2000


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