Boots – shoes – and leggings
Patent
1996-04-22
1998-11-10
Moise, Emmanuel L.
Boots, shoes, and leggings
36473601, 364769, 364770, 327355, G06F 700, G06F 1500
Patent
active
058353895
ABSTRACT:
The absolute difference of two signed or unsigned integer numbers (A, B) is calculated in one instruction cycle by bit-complementing the B operand, summing the A and bit-complemented B operands to obtain an intermediate result, detecting whether the intermediate result overflows, then either incrementing the intermediate result or bit-complementing the intermediate result as appropriate. The B operand is bit-complemented by a first inverter circuit (302). The A and bit-complemented B operands are summed in an adder (304) that provides a sum and sum-plus-one output. The sum output is bit-complemented by a second inverter circuit (306). A multiplexer (310) under the control of a control circuit (308) selects one of the bit-complemented sum output and sum-plus-one output, based on inspection of the most significant bits of the A operand, B operand, and sum output, a carry-out bit from the sum output, and a mode signal indicative of whether the operands are signed or unsigned values.
REFERENCES:
patent: 4218751 (1980-08-01), McManigal
patent: 4825400 (1989-04-01), Simoncic et al.
patent: 5235536 (1993-08-01), Matsubishi et al.
patent: 5373459 (1994-12-01), Taniguchi
patent: 5448509 (1995-09-01), Lee et al.
Moise Emmanuel L.
Samsung Electronics Company, Ltd.
Sigmond David M.
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