Boots – shoes – and leggings
Patent
1994-11-02
1996-11-05
Malzahn, David H.
Boots, shoes, and leggings
G06F 750
Patent
active
055724558
ABSTRACT:
An adder-subtractor includes a jth device for each bit position j for computing a result for an expression .+-.a.sub.0 .+-.a.sub.1, where a.sub.0 and a.sub.1 are binary numbers. The jth device is from a group of devices, the group being defined by formulas using integer parameters k, p.sub.0, p.sub.1, t, x.sub.0, x.sub.1, y.sub.0, and y.sub.1, each of the parameters having a integer value that is 0 or 1. The jth device includes a line carrying an input a.sub.1j representing a jth digit of the a.sub.1 number. The jth device further includes a line carrying an input w.sub.1j =1-y.sub.1 when s.sub.1 =1-x.sub.1 and if a previous bit position of the a.sub.1 number is 1, and w.sub.1j =y.sub.1 when s.sub.1 =1-x.sub.1 and there is no 1 on previous bit position. A plurality of switches, between the lines, direct to the forward output F.sub.out a bit value, according to one of said formulas:
REFERENCES:
patent: 3462589 (1969-08-01), Robertson
patent: 4838646 (1989-06-01), Lasher et al.
patent: 4866657 (1989-09-01), Nishiyama et al.
patent: 4979140 (1990-12-01), Darley
Arizienis, "Binary-Compatible Signed-Digit Arithmetic" Proceedings--Fall Joint Computer Conference, 1964 pp. 663-672.
Malzahn David H.
Trzyna Peter K.
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