GB1145661A - Electronic calculators - Google Patents

Electronic calculators

Info

Publication number
GB1145661A
GB1145661A GB9208/66A GB920866A GB1145661A GB 1145661 A GB1145661 A GB 1145661A GB 9208/66 A GB9208/66 A GB 9208/66A GB 920866 A GB920866 A GB 920866A GB 1145661 A GB1145661 A GB 1145661A
Authority
GB
United Kingdom
Prior art keywords
floating point
bits
bit
group
register
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
GB9208/66A
Other languages
English (en)
Inventor
Panayotis Caroussos
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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 Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Publication of GB1145661A publication Critical patent/GB1145661A/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
    • G06F7/483—Computations with numbers represented by a non-linear combination of denominational numbers, e.g. rational numbers, logarithmic number system or floating-point numbers
    • G06F7/487—Multiplying; Dividing
    • G06F7/4876—Multiplying
    • 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
    • G06F7/483—Computations with numbers represented by a non-linear combination of denominational numbers, e.g. rational numbers, logarithmic number system or floating-point numbers
    • G06F7/485—Adding; Subtracting
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/14—Conversion to or from non-weighted codes
    • H03M7/24—Conversion to or from floating-point codes
    • 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
    • G06F7/49936—Normalisation mentioned as feature only

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Complex Calculations (AREA)
  • Executing Machine-Instructions (AREA)
GB9208/66A 1965-03-02 1966-03-02 Electronic calculators Expired GB1145661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7632A FR1435080A (fr) 1965-03-02 1965-03-02 Procédé pour améliorer les conditions d'utilisation d'une calculatrice arithmétique et machine à calculer utilisant ce procédé

Publications (1)

Publication Number Publication Date
GB1145661A true GB1145661A (en) 1969-03-19

Family

ID=8572523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9208/66A Expired GB1145661A (en) 1965-03-02 1966-03-02 Electronic calculators

Country Status (5)

Country Link
US (1) US3460095A (enExample)
DE (1) DE1297906B (enExample)
FR (1) FR1435080A (enExample)
GB (1) GB1145661A (enExample)
NL (1) NL6602726A (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623009A (en) * 1968-11-18 1971-11-23 Singer Co Electronic printing calculator
US3872442A (en) * 1972-12-14 1975-03-18 Sperry Rand Corp System for conversion between coded byte and floating point format
US3930232A (en) * 1973-11-23 1975-12-30 Raytheon Co Format insensitive digital computer
JPS5776634A (en) * 1980-10-31 1982-05-13 Hitachi Ltd Digital signal processor
US4603323A (en) * 1984-05-25 1986-07-29 International Business Machines Corporation Method for extending the exponent range of an IBM 370-type floating point processor
GB2556645B (en) * 2017-03-24 2019-04-03 Imagination Tech Ltd Floating point to fixed point conversion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037701A (en) * 1956-11-21 1962-06-05 Ibm Floating decimal point arithmetic control means for calculator
US3043509A (en) * 1959-09-08 1962-07-10 Ibm Normalizing apparatus for floating point operations
US3235846A (en) * 1961-03-15 1966-02-15 Nippon Electric Co Data processing system
US3236999A (en) * 1962-10-01 1966-02-22 North American Aviation Inc Computer having floating point division
US3244864A (en) * 1962-12-10 1966-04-05 Burroughs Corp Subtraction unit for a digital computer

Also Published As

Publication number Publication date
DE1297906B (de) 1969-06-19
US3460095A (en) 1969-08-05
FR1435080A (fr) 1966-04-15
NL6602726A (enExample) 1966-09-05

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