Abstract:
Speculative adders have attracted strong interest for achieving sublogarithmic delays by exploiting the tradeoffs between correctness and performance. Speculative adders ...Show MoreMetadata
Abstract:
Speculative adders have attracted strong interest for achieving sublogarithmic delays by exploiting the tradeoffs between correctness and performance. Speculative adders also find use in the design of error-free variable latency adders, which combine speculation with error correction to achieve high performance for low area overhead over traditional adders. This paper describes static window addition (SWA), a novel function speculation technique for the design of low overhead, high performance variable latency adders. Analytical models for the error rate of SWA-based speculative adders are developed to facilitate both design exploration and convergence. We show that on average, variable latency addition using SWA-based speculative adders is 10% faster than the fastest DesignWare adder with area requirements of -5 to 40% for different adder widths.
Date of Conference: 09-12 October 2011
Date Added to IEEE Xplore: 17 November 2011
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