| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To quicken a distributed arithmetic operation while maintaining the size of a storage means small. <P>SOLUTION: An arithmetic unit is provided with a distributed arithmetic operating means 251 for inputting a first data set and a storage means 204 for storing the table of data corresponding to a second input data set. The distributed arithmetic operating means 251 is provided with conversion means 202a and so on for generating data with T bit width from the first input data set, selection means 205a and so on for selecting the optimal data from the data set outputted from the storage means 204 according to the contents of respective bits from the least significant bit to most significant bit of the conversion means 202a and so on, a second arithmetic means 207 for executing the addition/subtraction of the output data of the first arithmetic means 206 for executing the arithmetic operation of the data outputted from the selection means 205a and so on and the output of a third arithmetic means 208 for executing bit shift and a temporary storage means 209 for temporarily storing arithmetic results outputted from the second arithmetic means 207. <P>COPYRIGHT: (C)2004,JPO</p> |
