GB1245441A - Improvements in or relating to adders operating on variable fields within words - Google Patents

Improvements in or relating to adders operating on variable fields within words

Info

Publication number
GB1245441A
GB1245441A GB40863/68A GB4086368A GB1245441A GB 1245441 A GB1245441 A GB 1245441A GB 40863/68 A GB40863/68 A GB 40863/68A GB 4086368 A GB4086368 A GB 4086368A GB 1245441 A GB1245441 A GB 1245441A
Authority
GB
United Kingdom
Prior art keywords
field
unit
adder
bits
words
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.)
Expired
Application number
GB40863/68A
Other languages
English (en)
Inventor
Trevor William Hanslip
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 Services Ltd
Original Assignee
Fujitsu Services 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 Services Ltd filed Critical Fujitsu Services Ltd
Priority to GB40863/68A priority Critical patent/GB1245441A/en
Priority to DE19691939946 priority patent/DE1939946C/de
Priority to US851591A priority patent/US3683163A/en
Priority to FR6929205A priority patent/FR2016448A1/fr
Publication of GB1245441A publication Critical patent/GB1245441A/en
Expired 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
    • G06F7/50—Adding; Subtracting
    • G06F7/505—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination
    • 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
    • G06F7/491—Computations with decimal numbers radix 12 or 20.
    • G06F7/492—Computations with decimal numbers radix 12 or 20. using a binary weighted representation within each denomination
    • G06F7/493—Computations with decimal numbers radix 12 or 20. using a binary weighted representation within each denomination the representation being the natural binary coded representation, i.e. 8421-code
    • G06F7/494—Adding; Subtracting
    • 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
    • G06F2207/3808—Details concerning the type of numbers or the way they are handled
    • G06F2207/3812—Devices capable of handling different types of numbers
    • G06F2207/3816—Accepting numbers of variable word length
    • 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
    • G06F2207/492—Indexing scheme relating to groups G06F7/492 - G06F7/496
    • G06F2207/4924—Digit-parallel adding or subtracting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Optimization (AREA)
  • General Engineering & Computer Science (AREA)
  • Complex Calculations (AREA)
  • Executing Machine-Instructions (AREA)
GB40863/68A 1968-08-27 1968-08-27 Improvements in or relating to adders operating on variable fields within words Expired GB1245441A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB40863/68A GB1245441A (en) 1968-08-27 1968-08-27 Improvements in or relating to adders operating on variable fields within words
DE19691939946 DE1939946C (de) 1968-08-27 1969-08-06 Addierverfahren mit einem veränderlichen Feld
US851591A US3683163A (en) 1968-08-27 1969-08-20 Variable field adder
FR6929205A FR2016448A1 (enExample) 1968-08-27 1969-08-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40863/68A GB1245441A (en) 1968-08-27 1968-08-27 Improvements in or relating to adders operating on variable fields within words

Publications (1)

Publication Number Publication Date
GB1245441A true GB1245441A (en) 1971-09-08

Family

ID=10416998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40863/68A Expired GB1245441A (en) 1968-08-27 1968-08-27 Improvements in or relating to adders operating on variable fields within words

Country Status (3)

Country Link
US (1) US3683163A (enExample)
FR (1) FR2016448A1 (enExample)
GB (1) GB1245441A (enExample)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921144A (en) * 1971-05-18 1975-11-18 Ibm Odd/even boundary address alignment system
US3751650A (en) * 1971-06-28 1973-08-07 Burroughs Corp Variable length arithmetic unit
US3987291A (en) * 1975-05-01 1976-10-19 International Business Machines Corporation Parallel digital arithmetic device having a variable number of independent arithmetic zones of variable width and location
JPS58182754A (ja) * 1982-04-19 1983-10-25 Hitachi Ltd 演算処理装置
US4914617A (en) * 1987-06-26 1990-04-03 International Business Machines Corporation High performance parallel binary byte adder
GB8904392D0 (en) * 1989-02-27 1989-04-12 Ibm An arithmetic logic unit for a graphics processor
US5197140A (en) * 1989-11-17 1993-03-23 Texas Instruments Incorporated Sliced addressing multi-processor and method of operation
FR2802660B1 (fr) 1999-12-21 2002-11-29 St Microelectronics Sa Procede pour effectuer des operations avec une arithmetique variable
US8495114B1 (en) * 2005-05-23 2013-07-23 The Mathworks, Inc. System and methods for determining attributes for arithmetic operations with fixed-point numbers
US8484262B1 (en) * 2005-12-22 2013-07-09 The Mathworks, Inc. System and methods for determining attributes for arithmetic operations with fixed-point numbers
US8464129B2 (en) * 2008-08-15 2013-06-11 Lsi Corporation ROM list-decoding of near codewords
FR3101981B1 (fr) * 2019-10-11 2021-11-12 St Microelectronics Grenoble 2 Extraction et insertion de mots binaires

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260840A (en) * 1961-12-28 1966-07-12 Ibm Variable mode arithmetic circuits with carry select
US3430202A (en) * 1964-10-07 1969-02-25 Bell Telephone Labor Inc Data processor utilizing combined order instructions
US3439347A (en) * 1966-12-13 1969-04-15 Gen Electric Sub-word length arithmetic apparatus

Also Published As

Publication number Publication date
DE1939946A1 (de) 1970-03-05
FR2016448A1 (enExample) 1970-05-08
US3683163A (en) 1972-08-08
DE1939946B2 (de) 1972-11-02

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