| 摘要 |
PURPOSE:To reduce an operating time by applying updating operation sequentially by the number of times obtained by the 3rd step sequentially and using an updated dividend obtained finally as a quotient to reduce the number of arithmetic steps. CONSTITUTION:In the 3rd step, based on the data word length of a mantissa part of a divider (B0) or a dividend (A0), the number of times (m) of the updating operation executed in the next 4th step. In the 4th step, m-time of updating operation is applied sequentially to the dividend (A0'') revised by the 2nd step and the updated dividend (Am=Am-1.Sm-1+Am-1) obtained finally is used as a quotient. Among the m-time updating operation executed in the 4th step, the 1st updating operation a product (A0''S0) obtained by multiplying the (A0'') updated at the 2nd step by the initial value (S0) of the convergent coefficient, and the result is added with the dividend (A0''), then the sum (A0''S0+A0'') is obtained, then it is used as the 1st updated dividend. Thus, the division processing is quickened by the remarkable reduction in the number of arithmetic steps and the further reduction of the operating time. |
