Boots – shoes – and leggings
Patent
1996-09-24
1998-12-15
Elmore, Reba I.
Boots, shoes, and leggings
36478401, G06F 750
Patent
active
058503471
ABSTRACT:
The expression 2A+sign(A), where A is a signed binary integer represented in 2's complement form, sign(A) is equal to one when A is greater than zero, sign(A) is equal to zero when A is zero, and sign(A) is equal to negative one when A is less than zero, is calculated by bit-complementing A, bit-complementing (A+A+2) when A is less than zero, bit-complementing (A+A+1) when A is equal to zero, and bit-complementing all bits except a least significant bit of (A+A+1) when A is greater than zero. Zero detect for A is provided by determining whether a first carry-out bit from (A+A+1) and a second carry-out bit from (A+A+2) have different logical values. In this manner, 2A+sign(A) can be calculated by a general purpose computer in a single instruction cycle.
REFERENCES:
patent: 4218751 (1980-08-01), McManigal
patent: 4709226 (1987-11-01), Christopher
patent: 4953115 (1990-08-01), Kanoh
patent: 5267187 (1993-11-01), Hsieh et al.
patent: 5373459 (1994-12-01), Taniguchi
patent: 5574671 (1996-11-01), Young et al.
U.S. Application Serial No. 08/658,454, Filed Jun. 5, 1996, entitled "Zero Detect for Binary Sum" by R. Wong.
U.S. Application Serial No. 08/695,142, Filed Aug. 8,1996, entitled "Zero Detect for Binary Difference " by R. Wong.
Dolan Robert J.
Elmore Reba I.
Samsung Semiconductor Inc.
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