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Digital Arithmetic
book

Digital Arithmetic

by Miloš D. Ercegovac, Tomás Lang
September 2003
Intermediate to advanced content levelIntermediate to advanced
709 pages
26h 51m
English
Morgan Kaufmann
Content preview from Digital Arithmetic
102 e H A P T E R 2 Two-Operand Addition
F I G U R E 2.33
Radix-8 carry-save adder.
The corresponding implementation is shown in Figure 2.33. Of course, this high-
radix implementation results in an increase in delay: from the delay of one full-
adder (for the radix-2 case) to the delay of a radix-r adder.
2.12~2
Signed-Digit Adder
In this case the result of the addition uses signed digits, which is a fixed-radix
representation with digit values from a signed-integer set. That is,
n--1
x "-- ~ Xi ri
2.88
0
with a digit set
D--{-b,...,-1, O, 1,...,a}
2.89
with the restriction a + b + 1 > r. Ifa + b + 1 - r, the representation ...
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Publisher Resources

ISBN: 9781558607989