发明名称 APPARATUS FOR MULTIPLICATION, DIVISION AND EXTRACTION OF SQUARE ROOT.
摘要 <p>An appts for multiplication, division and extraction of the square root which determines the value of a function of multiplication, division or extraction of the square root by iterated approximation. A multiplier, adder/subtractor and shifter each has a predetermined bit width and connected to a bus. The output of the multiplier is inputted to the adder/subtractor or to the shifter and the result is again inputted to the multiplier through the bus. This operation is repeated. A shifter and a calculator connected to a second bus through a switch have a bit width greater than the predetermined bit width, are used for large-scale calculation and prevent a drop in calculation speed.</p>
申请公布号 EP0394499(A1) 申请公布日期 1990.10.31
申请号 EP19890912134 申请日期 1989.11.02
申请人 HITACHI, LTD.;HITACHI ENGINEERING CO., LTD. 发明人 NARITA, MASAHISA;KAZIWARA, HISASHI;ASAI, TAKESHI;MORINAGA, SHIGEKI;KIDA, HIROYUKI;WATABE, MITSURU;NAKAMIKAWA, TETSUAKI;KAWASAKI, SHUNPEI;TATEZAKI, JUNICHI;NAKAGAWA, NORIO;KASHIWAGI, YUGO
分类号 G06F7/52;G06F7/552;G06F7/57 主分类号 G06F7/52
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