Circuit and method for shifting or rotating operands of multiple

Details Circuit and method for shifting or rotating operands of multiple Circuit and method for shifting or rotating operands of multiple

1997-12-19

1999-11-23

Ngo, Chuong Dinh

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

G06F 700

Patent

active

059917865

ABSTRACT:
A circuit and method for shifting or rotating operands of multiple size is disclosed. The method and circuit employs at least one shifting stage configured to receive and selectively shift an operand, and a first circuit coupled to and configured to receive the result of the shifting stage. The first circuit operates in accordance with signals received at first and second control nodes. The first circuit operates as a shifter for shifting or passing the result of the shifting stage in response to the first and second control nodes receiving a first shift or second shift signal, respectively. The first circuit also operates to logically OR one set of m consecutive bits of the result received from the shifting stage with another set of m consecutive bits of the result received from the shifting stage, in response to the first and second control nodes receiving an OR signal.

REFERENCES:
patent: 4490809 (1984-12-01), Ueda et al.
patent: 4631703 (1986-12-01), Sakamoto
patent: 4831571 (1989-05-01), Tokumaru
patent: 4839839 (1989-06-01), Tokumaru et al.
patent: 5379240 (1995-01-01), Byrne
patent: 5671166 (1997-09-01), Omote

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