JPS57172444A - Approximate quotient correcting circuit - Google Patents

Approximate quotient correcting circuit

Info

Publication number
JPS57172444A
JPS57172444A JP56055549A JP5554981A JPS57172444A JP S57172444 A JPS57172444 A JP S57172444A JP 56055549 A JP56055549 A JP 56055549A JP 5554981 A JP5554981 A JP 5554981A JP S57172444 A JPS57172444 A JP S57172444A
Authority
JP
Japan
Prior art keywords
digits
circuit
approximate quotient
digit
significant
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.)
Granted
Application number
JP56055549A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0250492B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Yasuhiro Inagami
Shigeo Nagashima
Koichiro Omoda
Shunichi Torii
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56055549A priority Critical patent/JPS57172444A/ja
Priority to US06/366,325 priority patent/US4488247A/en
Priority to DE8282103151T priority patent/DE3277745D1/de
Priority to EP82103151A priority patent/EP0063361B1/en
Publication of JPS57172444A publication Critical patent/JPS57172444A/ja
Publication of JPH0250492B2 publication Critical patent/JPH0250492B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F7/52—Multiplying; Dividing
    • G06F7/535—Dividing only
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/38—Indexing scheme relating to groups G06F7/38 - G06F7/575
    • G06F2207/3804—Details
    • G06F2207/386—Special constructional features
    • G06F2207/3884—Pipelining
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/535—Indexing scheme relating to groups G06F7/535 - G06F7/5375
    • G06F2207/5355—Using iterative approximation not using digit recurrence, e.g. Newton Raphson or Goldschmidt
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F7/499—Denomination or exception handling, e.g. rounding or overflow
    • G06F7/49942—Significance control

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Complex Calculations (AREA)
JP56055549A 1981-04-15 1981-04-15 Approximate quotient correcting circuit Granted JPS57172444A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56055549A JPS57172444A (en) 1981-04-15 1981-04-15 Approximate quotient correcting circuit
US06/366,325 US4488247A (en) 1981-04-15 1982-04-07 Correction circuit for approximate quotient
DE8282103151T DE3277745D1 (en) 1981-04-15 1982-04-14 Correction circuit for approximate quotient
EP82103151A EP0063361B1 (en) 1981-04-15 1982-04-14 Correction circuit for approximate quotient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56055549A JPS57172444A (en) 1981-04-15 1981-04-15 Approximate quotient correcting circuit

Publications (2)

Publication Number Publication Date
JPS57172444A true JPS57172444A (en) 1982-10-23
JPH0250492B2 JPH0250492B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-11-02

Family

ID=13001779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56055549A Granted JPS57172444A (en) 1981-04-15 1981-04-15 Approximate quotient correcting circuit

Country Status (4)

Country Link
US (1) US4488247A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0063361B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS57172444A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3277745D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60164837A (ja) * 1984-02-07 1985-08-27 Nec Corp 除算装置
JPS6345633A (ja) * 1986-08-12 1988-02-26 Nec Corp 乗算回路
US4797849A (en) * 1985-11-19 1989-01-10 Hitachi, Ltd. Pipelined vector divide apparatus

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140428A (ja) * 1983-12-28 1985-07-25 Hitachi Ltd 除算装置
JPS60142738A (ja) * 1983-12-30 1985-07-27 Hitachi Ltd 内挿近似を使用する除算装置
US4881193A (en) * 1986-09-04 1989-11-14 Hitachi, Ltd. Rational number operation unit for reduction
US4785412A (en) * 1987-07-20 1988-11-15 Control Data Corporation Double precision approximate quotient network
USH1222H (en) 1991-12-30 1993-08-03 Apparatus for determining sticky bit value in arithmetic operations
GB9708603D0 (en) * 1996-09-24 1997-06-18 Dandeker Kashinath N A control switch based on extensions of the recognition of the infinite patterns which mean minus zero
US7013320B2 (en) * 2002-01-25 2006-03-14 Intel Corporation Apparatus and method for remainder calculation using short approximate floating-point quotient
US8745118B2 (en) * 2008-02-25 2014-06-03 International Business Machines Corporation Verifying floating point square root operation results
US8713084B2 (en) * 2008-02-25 2014-04-29 International Business Machines Corporation Method, system and computer program product for verifying floating point divide operation results
US8626816B2 (en) * 2008-02-26 2014-01-07 International Business Machines Corporation Method, system and computer program product for detecting errors in fixed point division operation results
US8402078B2 (en) * 2008-02-26 2013-03-19 International Business Machines Corporation Method, system and computer program product for determining required precision in fixed-point divide operations

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508038A (en) * 1966-08-30 1970-04-21 Ibm Multiplying apparatus for performing division using successive approximate reciprocals of a divisor
US3648038A (en) * 1969-04-25 1972-03-07 Ibm Apparatus and method for obtaining the reciprocal of a number and the quotient of two numbers
US3633018A (en) * 1969-12-18 1972-01-04 Ibm Digital division by reciprocal conversion technique
US3777132A (en) * 1972-02-23 1973-12-04 Burroughs Corp Method and apparatus for obtaining the reciprocal of a number and the quotient of two numbers
US4364115A (en) * 1977-07-18 1982-12-14 Hitohisa Asai Apparatus for digital division computation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60164837A (ja) * 1984-02-07 1985-08-27 Nec Corp 除算装置
US4797849A (en) * 1985-11-19 1989-01-10 Hitachi, Ltd. Pipelined vector divide apparatus
JPS6345633A (ja) * 1986-08-12 1988-02-26 Nec Corp 乗算回路

Also Published As

Publication number Publication date
US4488247A (en) 1984-12-11
EP0063361B1 (en) 1987-11-25
EP0063361A2 (en) 1982-10-27
EP0063361A3 (en) 1984-05-09
JPH0250492B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-11-02
DE3277745D1 (en) 1988-01-07

Similar Documents

Publication Publication Date Title
JPS57172444A (en) Approximate quotient correcting circuit
US3855459A (en) Apparatus for converting data into the same units
KR910006838A (ko) 디지탈 가산 회로
EP0351829A3 (en) Integer division circuit provided with a overflow detection circuit
Certaine On sequences of pseudo-random numbers of maximal length
Ernvall et al. Cyclotomic invariants for primes between 125000 and 150000
JPS5619593A (en) Parity check processing system for memory
JPS5694435A (en) Multiplying circuit
JPS5616241A (en) Processing unit
SU1531091A1 (ru) Вычислительное устройство
SU362301A1 (ru) ВСЕСОЮЗНАЯ ' ййТ?йТйО«т:11:;Г'е"ндп
JPS55110343A (en) Arithmetic circuit
JPS5635256A (en) Electronic desk computer
JPS5494851A (en) Data processor
JPS5611548A (en) Division unit
SU1264168A1 (ru) Генератор псевдослучайной последовательности
SU1541628A1 (ru) Управл ющий процессор
SU1580351A1 (ru) Конвейерное устройство дл делени итерационного типа
JPS5771045A (en) Digital mulitplier
JPS5694436A (en) Division error detecting system
JPS5559563A (en) Error detector
JPS5523518A (en) Adder circuit having error check and correction function
JPS54124947A (en) Error check system of arithmetic circuit
JPS56129955A (en) Data processor
JPS5564456A (en) Error code generating circuit