International Business Machines Corporation

Gerhard R Tompson

Gerald Goertzel

David R Pruett

The present invention deals with rotating an n.times.n block of bits through an angle of +90 degrees or -90 degrees by a method including the steps of: storing the data in a matrix; separating the matrix into groups of bits of rotatable size; transposing first preselected bit positions with second preselected bit positions in each group; and exchanging a first one or more rows of bits in the group with a second one or more rows of bits in the group.

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Wappingers Falls, NY, United States of America

Gerhard R Tompson