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Formal Analysis of End-Around-Carry Adder in Floating-Point Unit

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4 Author(s)
Feng Liu ; National Laboratory of Parallel Distributed Processing, National University of Defense Technology, ChangSha, China ; Xiaoyu Song ; Qingping Tan ; Gang Chen

End-around-carry (EAC) adder is extensively used in microprocessor's floating-point units. This paper presents an algebraic characterization of an EAC adder's algorithm. A novel symbolic analysis approach is presented to prove the EAC adder's correctness. Algebraic structures and first-order recursive equations are harnessed in proof derivations. A hybrid prefix/EAC architecture is considered.

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:29 ,  Issue: 10 )