Coherent Design of Hybrid Approximate Adders: Unified Design Framework and Metrics

verfasst von

A. Najafi, M. Weißbrich, G. Payá-Vayá, A. Garcia-Ortiz

Abstract

Numerous approximate adders have been proposed in the literature in response to the languishing benefits of technology scaling. However, they have been obtained with an ad-hoc and non-systematic methodology which does not fully exploit the design space possibilities. This paper provides a conceptual framework for the systematic design of approximate adders, including hybrid and non-equally segmented approaches as well as more robust error metrics. The framework discriminates the scenarios, where approximate processing does not provide significant benefits from those where it does; in this later case, it aids to obtain optimal configurations for the adders. Experimental results with a commercial technology assess the significant improvements of our systematic approach. Furthermore, a case study with a processor enhanced with an approximate accelerator highlights the usability of the methods.

Organisationseinheit(en)

Fachgebiet Architekturen und Systeme

Typ

Artikel

Journal

IEEE Journal on Emerging and Selected Topics in Circuits and Systems

Band

8

Seiten

736-745

Anzahl der Seiten

10

ISSN

2156-3357

Publikationsdatum

12.2018

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektrotechnik und Elektronik

Ziele für nachhaltige Entwicklung

SDG 3 – Gute Gesundheit und Wohlergehen

Elektronische Version(en)

https://doi.org/10.1109/jetcas.2018.2833284 (Zugang: Geschlossen)