JPS6462727A - Adder-subtracter - Google Patents

Adder-subtracter

Info

Publication number
JPS6462727A
JPS6462727A JP22070087A JP22070087A JPS6462727A JP S6462727 A JPS6462727 A JP S6462727A JP 22070087 A JP22070087 A JP 22070087A JP 22070087 A JP22070087 A JP 22070087A JP S6462727 A JPS6462727 A JP S6462727A
Authority
JP
Japan
Prior art keywords
zone
data
format
carry
setting control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22070087A
Other languages
Japanese (ja)
Inventor
Toshimitsu Nagata
Shigemi Uemoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP22070087A priority Critical patent/JPS6462727A/en
Publication of JPS6462727A publication Critical patent/JPS6462727A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To operate data of a zone format in a state that it remains at a zone format, by changing a pattern of a zone part so that the carry can be executed automatically in a numerical value part, as if it is a back format. CONSTITUTION:A zone part of data d1 is set to 0(0000) by a zone part setting control part 5, and a zone part of data d2 added or subtracted to or from the data d1 is set to 9(1001) by a zone part setting control part 6. An arithmetic part 1 executes a decimal operation with regard to each digit of a numerical value part of the data d1, d2, and a carry is brought to carry as it is to the zone part of the upper side. A zone part setting control part 7 sets the zone part of an output of the arithmetic part 1 to F (being a binary number 1111 and having no meaning in a binary coded decimal code). In such a way, by operating data of a zone format by the zone format as it is, it becomes unnecessary to convert a data format, and the calculation can be executed at a high speed.
JP22070087A 1987-09-03 1987-09-03 Adder-subtracter Pending JPS6462727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22070087A JPS6462727A (en) 1987-09-03 1987-09-03 Adder-subtracter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22070087A JPS6462727A (en) 1987-09-03 1987-09-03 Adder-subtracter

Publications (1)

Publication Number Publication Date
JPS6462727A true JPS6462727A (en) 1989-03-09

Family

ID=16755121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22070087A Pending JPS6462727A (en) 1987-09-03 1987-09-03 Adder-subtracter

Country Status (1)

Country Link
JP (1) JPS6462727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008188A1 (en) * 1990-11-02 1992-05-14 Seiko Epson Corporation Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008188A1 (en) * 1990-11-02 1992-05-14 Seiko Epson Corporation Semiconductor device

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