| 摘要 |
A division processing system performs 2N-bit precision division processing by effectively using division processing circuitry with N-bit precision. The system performs the division with 2N-bit precision as follows: <IMAGE> (n=N: the number of digit positions in selected binary numbers A, B, C and D). The above expression is approximated to the form of Q1+Q2x2-n (Q1, Q2: binary numbers). The binary numbers Q1 and Q2 are respectively operated on by the division processing circuitry with N-bit precision. By effective control, the error caused during the division processing of Q1 is used as a part of the data for performing the division processing of Q2, thus effectively transferring any error evolving during the processing of Q1 to Q2. The function is performed in a system having only four registers, each of N-bit capacity (precision), and an operation register, multiplication circuitry, division circuitry, and a shift circuit, affording proper control of data transfer between the registers.
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