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Design of the ARM VFP11 Divide and Square Root Synthesisable Macrocell

This paper presents the detailed design of the ARM VFP11 divide and square root synthesisable macrocell. The macrocell was designed using the minimum-redundancy radix-4 SRT digit recurrence algorithm, and this paper describes a novel acceleration technique employed to achieve the required processor clock frequency of up to 750 MHz in 90 nm CMOS. Logical effort theory is used to provide a delay analysis of the unit, which demonstrates the balanced nature of the two critical paths therein.