Unified Digit Selection for Radix-4 Recurrence Division and Square Root
David Harris,
James Stine,
Miloš Ercegovac
et al.
Abstract:Division and square root are fundamental operations required by most computer systems. They are commonly implemented in hardware using radix-4 recurrence, which produces a 2-bit result digit on each step. Unified digit selection logic chooses the next quotient or square root digit based on a residual and divisor or square root approximation. This paper presents the first derivation of digit selection constants for unified radix-4 recurrence division and square root.
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