Arithmetic circuit with overflow detection capability

Details Arithmetic circuit with overflow detection capability Arithmetic circuit with overflow detection capability

G - Physics

06

F

354/204

G06F 7/50 (2006.01)

Patent

CA 1165891

ABSTRACT An arithmetic circuit responsive to two sets of input data represented in two's complement form for carrying out consecutive addition or subtraction is described. In such circuits according to the prior-art various techniques were used to overcome the problem of overflow in the consecutive addition operation, one such technique being to correct the result of the operation every time over- flow occurred. The invention described represents a significant departure by not compensating for overflow each time it occurs. Instead, the complete sequence of consecutive addition operations is allowed to proceed with overflows in both directions. If, ultimately, there are an equal number of positive as negative overflows, no correction is necessary.

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