Abstract
In view of increasing prominence of commercial, financial and Internet-based applications that process data in decimal format, there is a renewed interest in providing hardware support to handle decimal data. In this paper, a new architecture for efficient 1-digit decimal addition of binary coded decimal (BCD) operands, which is the core of high speed multi-operand adders and floating decimal-point arithmetic, is proposed. Based on this 1-digit BCD adder, novel architectures for higher order (n-digit) BCD adders such as ripple carry adder and carry look-ahead adder are derived. The proposed circuits are compared (both qualitatively as well as quantitatively) with the existing circuits in literature and are shown to perform better. Simulation results show that the proposed 1-digit BCD adder achieves an improvement of 40% in delay. The 16-digit BCD look-ahead adder using prefix logic is shown to perform at least 80% faster than the existing ripple carry one.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
