发明名称 FLOATING POINT ARITHMETIC UNIT
摘要 PURPOSE:To perform the division processing at a high speed by carrying out the comparison between the mantissa parts via a comparator to decide occurrence of the take-down independently of the division of the mantissa part and performing the process of an exponent part independently of the division of the mantissa part. CONSTITUTION:Both a dividend N and a divisor D are equal to the normalized floating point number data and are compared with each other by a comparator 102 to acquire the result Mn>Md. In such a case, the take-down is never produced in case the division is carried out at a mantissa part between both results Mn and Md. While the take-down is always produced in case of Mn<Md. Thus the presence or absence of the take-down is known based on the result of said comparison without waiting for the result obtained from a mantissa part divider. Then a subtractor 103 can calculate an exponent part Eq of the quotient Q with use of the exponent parts En and Ed as well as the comparison output received from the comparator 102. As a result, the parallel operations can be carried out between the exponent and mantissa parts and a high-speed division operation is attained.
申请公布号 JPH01265326(A) 申请公布日期 1989.10.23
申请号 JP19880094825 申请日期 1988.04.18
申请人 MATSUSHITA ELECTRIC IND CO LTD 发明人 NAKAJIMA MASAICHI
分类号 G06F7/537;G06F7/00;G06F7/483;G06F7/508;G06F7/52;G06F7/535;G06F7/76 主分类号 G06F7/537
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