To provide proper rounding for floating-point addition, three extra bits are included in right shifts of fractions:
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To provide proper rounding for floating-point addition, three extra bits are included in right shifts of fractions: guard, round, and sticky. The least-significant of these, the sticky bit, stays one whenever a 1 bit is shifted through it. In designing the logic for a sticky bit, let the following state transistion table define the actions for R (reset) and I (input) on a D flip-flop.
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Computer Organization And Design The Hardware Software Interface
ISBN: 9780123747501
4th Revised Edition
Authors: David A. Patterson, John L. Hennessy
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