Importance

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Abstract

An exponent preprocessing unit preprocesses an n-bit exponent k and exponentiates a base A by the preprocessed exponent k. A bit string storing unit stores a bit string including a sign bit and the exponent k. A reading unit reads a bit pattern composed of the sign bit and a bit sequence made up of a predetermined number of bits. A bit pattern generating unit generates a new bit pattern from the read bit pattern. An operation pattern specifying unit specifies an operation pattern based on the read bit pattern. An operating unit performs an operation according to the specified operation pattern and writes the new bit pattern over the previous bit pattern. The reading unit reads a next bit sequence starting from a different bit in the bit string storing unit. A repeat controlling unit repeats these procedures n+1 times.

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First Claim