JPS56103739A - Decimal divider - Google Patents

Decimal divider

Info

Publication number
JPS56103739A
JPS56103739A JP643580A JP643580A JPS56103739A JP S56103739 A JPS56103739 A JP S56103739A JP 643580 A JP643580 A JP 643580A JP 643580 A JP643580 A JP 643580A JP S56103739 A JPS56103739 A JP S56103739A
Authority
JP
Japan
Prior art keywords
register
stored
decimal
quotinent
divisor
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
JP643580A
Other languages
Japanese (ja)
Inventor
Hisao Nakajo
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP643580A priority Critical patent/JPS56103739A/en
Publication of JPS56103739A publication Critical patent/JPS56103739A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/491—Computations with decimal numbers radix 12 or 20.
    • G06F7/4915—Multiplying; Dividing
    • G06F7/4917—Dividing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

PURPOSE:To reduce processing time of a decimal divider, by making decimal division with round-off functions for discrimination whether 1 is added or not to the quotinent of the least significant figure, with a simple circuit. CONSTITUTION:In executing the decimal division with round-off function at a microprogram control, the value five times the divisor is stored in a VR register 17 before dividion, and a divisor is stored in an RDVR register 16 and a dividend is in a RDIV register 11. Further, the content of the register 17 is subtracted from the content of the register 11 with a decimal addition and subtraction device 19 in the first step of a division loop, and the result is stored in the register 16. Further, the constant 5 is selected from a selector circuit 20, a quotinent figure RQD by every one figure is stored in a RQD register 21, and 5 is set when it is five times the divisor to store this information in a RQ register 15. Further, the operation is executed depending on the presence of the output of a carry signal from an adder/subtractor 19, and the processing whether 1 is added or not to the quotinent at the least significant figure is determined depending on the content of the register 15 at the end of operation.
JP643580A 1980-01-23 1980-01-23 Decimal divider Pending JPS56103739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP643580A JPS56103739A (en) 1980-01-23 1980-01-23 Decimal divider

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP643580A JPS56103739A (en) 1980-01-23 1980-01-23 Decimal divider

Publications (1)

Publication Number Publication Date
JPS56103739A true JPS56103739A (en) 1981-08-19

Family

ID=11638309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP643580A Pending JPS56103739A (en) 1980-01-23 1980-01-23 Decimal divider

Country Status (1)

Country Link
JP (1) JPS56103739A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132837A (en) * 1982-02-03 1983-08-08 Hitachi Ltd Divider

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132837A (en) * 1982-02-03 1983-08-08 Hitachi Ltd Divider
JPS6248857B2 (en) * 1982-02-03 1987-10-15 Hitachi Ltd

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