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1. 发明公开

EP0366155A3 Logarithmic function arithmetic unit including means for separately processing pseudo division and multiplication 失效
标题翻译：对数函数算术单元，包括用于单独处理PSEUDO分类和多项式的方法
公开(公告)号：EP0366155A3
公开(公告)日：1991-11-13
申请号：EP89120128.7
申请日：1989-10-30
申请人： NEC CORPORATION
发明人： Nakayama, Misayo c/o NEC Corporation
IPC分类号： G06F7/556 , G06F1/03
CPC分类号： G06F1/0307 , G06F7/4833 , G06F7/556
摘要： In a log e (1 + x/y) arithmetic unit by use of the STL algorithm, in order to reduce the arithmetic time, a pseudo division is at first effected by use of w = (2X k - Y k ) for k, initial values being mantissas X and Y of given x 2 -i ·X and y = 2 -j ·Y to produce X m and Y m , and thereafter, using X m and Y m as initial values a pseudo multiplication is effected by use of X k+1 = (X k + Γ k ) or X k+1 = X k /2 for k to obtain a mantissa of log e (1 + x/y). The unit comprises coefficient generator for producing k and Γ k , and first and second adder/subtractors accompanying with first and second registers for executing the pseudo division and the pseudo multipliction according to k and Γ k from the coefficient generator.

2. 发明授权

EP0366155B1 Logarithmic function arithmetic unit including means for separately processing pseudo division and multiplication 失效
标题翻译：对于对数函数运算单元，用于伪除法和乘法的单独的处理设有用于
公开(公告)号：EP0366155B1
公开(公告)日：1996-05-29
申请号：EP89120128.7
申请日：1989-10-30
申请人： NEC CORPORATION
发明人： Nakayama, Misayo c/o NEC Corporation
IPC分类号： G06F7/556 , G06F1/03
CPC分类号： G06F1/0307 , G06F7/4833 , G06F7/556

3. 发明公开

EP0366155A2 Logarithmic function arithmetic unit including means for separately processing pseudo division and multiplication 失效
标题翻译：对于对数函数运算单元，设置有用于伪除法和乘法的单独的处理。
公开(公告)号：EP0366155A2
公开(公告)日：1990-05-02
申请号：EP89120128.7
申请日：1989-10-30
申请人： NEC CORPORATION
发明人： Nakayama, Misayo c/o NEC Corporation
IPC分类号： G06F7/556 , G06F1/03
CPC分类号： G06F1/0307 , G06F7/4833 , G06F7/556
摘要： In a log e (1 + x/y) arithmetic unit by use of the STL algorithm, in order to reduce the arithmetic time, a pseudo division is at first effected by use of w = (2X k - Y k ) for k, initial values being mantissas X and Y of given x 2 -i ·X and y = 2 -j ·Y to produce X m and Y m , and thereafter, using X m and Y m as initial values a pseudo multiplication is effected by use of X k+1 = (X k + Γ k ) or X k+1 = X k /2 for k to obtain a mantissa of log e (1 + x/y). The unit comprises coefficient generator for producing k and Γ k , and first and second adder/subtractors accompanying with first and second registers for executing the pseudo division and the pseudo multipliction according to k and Γ k from the coefficient generator.
摘要翻译：在一个包厢（1 + X / Y）通过使用STL算法的运算单元中，为了减少运算时间，伪分割首先通过使用瓦特=的实现（2Xk - YK）对于k，初始值是尾数x和Y的给定的x 2的 .X和y = 2 .Y产生XM YM和，之后，用XM YM和作为初始值的伪乘法是通过使用X k的影响+ 1 =（值Xk + GAMMA K）或值Xk + 1 =值Xk / 2 k以获得包厢的尾数（1 + X / Y）。该单元包括系数发生器，用于生产K和K GAMMA，以及第一和第二加法器/减法器与第一和第二寄存器伴随用于从所述系数发生器执行伪分割和伪multiplictiongemäß到k和GAMMAķ。

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