Power-delay tradeoffs for radix-4 and radix-8 dividers Article Swipe

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Radix (gastropod) Division (mathematics) Dissipation CMOS Computer science Energy consumption Arithmetic Electronic engineering Mathematics Engineering Electrical engineering Physics Thermodynamics Biology Botany

Alberto Nannarelli , Tomás Lang ·

YOU? · · 1998 · Open Access · · DOI: https://doi.org/10.1145/280756.280813 · OA: W2045600720

The use of higher radices in division reduces the n umber of iterations to complete the operation, but increases the complexity of the circuit. In this paper we explore the influence of the radix on the pow er dissipation of a floating-point divider and the pow er-dela y tradeoffs. We compare the performance and the energy consumption per operation for a radix-4 and a radix-8 divider, realized in CMOS technology. A reduction of about 40% in the energy consumption is obtained for both radices (about 70% if low-v oltage gates, for dual v oltage implementation, are a vailable). Also the results sho w that the radix-8 divider is about 20% faster and the energy dissipated to perform a division is about the same, with respect to the radix-4.