BE780699A - Procede et dispositif pour former une representation d'un nombre a virgule flottante - Google Patents
Procede et dispositif pour former une representation d'un nombre a virgule flottanteInfo
- Publication number
- BE780699A BE780699A BE780699A BE780699A BE780699A BE 780699 A BE780699 A BE 780699A BE 780699 A BE780699 A BE 780699A BE 780699 A BE780699 A BE 780699A BE 780699 A BE780699 A BE 780699A
- Authority
- BE
- Belgium
- Prior art keywords
- representation
- forming
- floating number
- floating
- Prior art date
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
- G06F7/483—Computations with numbers represented by a non-linear combination of denominational numbers, e.g. rational numbers, logarithmic number system or floating-point numbers
-
- 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
- G06F7/499—Denomination or exception handling, e.g. rounding or overflow
- G06F7/49942—Significance control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computational Mathematics (AREA)
- Computing Systems (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- General Engineering & Computer Science (AREA)
- Complex Calculations (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12601671A | 1971-03-19 | 1971-03-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE780699A true BE780699A (fr) | 1972-07-03 |
Family
ID=22422554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE780699A BE780699A (fr) | 1971-03-19 | 1972-03-15 | Procede et dispositif pour former une representation d'un nombre a virgule flottante |
Country Status (9)
Country | Link |
---|---|
US (1) | US3742198A (fr) |
JP (1) | JPS5221860B1 (fr) |
BE (1) | BE780699A (fr) |
CA (1) | CA991750A (fr) |
DE (1) | DE2212967C3 (fr) |
FR (1) | FR2129777A5 (fr) |
GB (1) | GB1375250A (fr) |
IT (1) | IT952219B (fr) |
NL (1) | NL163643C (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US3924111A (en) * | 1974-09-25 | 1975-12-02 | Charles R Farris | Electronic calculators for navigational purposes |
US4038538A (en) * | 1975-08-18 | 1977-07-26 | Burroughs Corporation | Integer and floating point to binary converter |
JPS5597426U (fr) * | 1978-12-23 | 1980-07-07 | ||
US4608554A (en) * | 1982-09-14 | 1986-08-26 | Mobil Oil Corporation | Asynchronous parallel fixed point converter |
US4617641A (en) * | 1983-10-19 | 1986-10-14 | Hitachi, Ltd. | Operation unit for floating point data having a variable length exponent part |
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 |
JPS61123928A (ja) * | 1984-09-05 | 1986-06-11 | Hitachi Ltd | 浮動小数点データ処理装置 |
US4847802A (en) * | 1986-06-12 | 1989-07-11 | Advanced Micro Devices, Inc. | Method and apparatus for identifying the precision of an operand in a multiprecision floating-point processor |
FR2613155B1 (fr) * | 1987-03-27 | 1989-06-23 | Cit Alcatel | Procede de codage de nombres sous forme binaire et dispositif pour sa mise en oeuvre |
JPH0284122A (ja) * | 1988-03-03 | 1990-03-26 | Hideki Kikuchi | たもの保持具 |
US20070260665A1 (en) * | 2006-04-20 | 2007-11-08 | Chengpu Wang | Method of Specifying and Tracking Precision in Floating-point Calculation |
US8412760B2 (en) * | 2008-07-22 | 2013-04-02 | International Business Machines Corporation | Dynamic range adjusting floating point execution unit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3056550A (en) * | 1960-01-18 | 1962-10-02 | Bendix Corp | Variable-exponent computers |
US3434114A (en) * | 1966-09-23 | 1969-03-18 | Ibm | Variable floating point precision |
US3496550A (en) * | 1967-02-27 | 1970-02-17 | Burroughs Corp | Digital processor with variable field length operands using a first and second memory stack |
US3539790A (en) * | 1967-07-03 | 1970-11-10 | Burroughs Corp | Character oriented data processor with floating decimal point multiplication |
US3569685A (en) * | 1968-07-11 | 1971-03-09 | Fairchild Camera Instr Co | Precision controlled arithmetic processing system |
-
1971
- 1971-03-19 US US00126016A patent/US3742198A/en not_active Expired - Lifetime
- 1971-10-19 CA CA125,508A patent/CA991750A/en not_active Expired
-
1972
- 1972-03-11 IT IT48928/72A patent/IT952219B/it active
- 1972-03-13 NL NL7203292.A patent/NL163643C/xx not_active IP Right Cessation
- 1972-03-15 BE BE780699A patent/BE780699A/fr not_active IP Right Cessation
- 1972-03-16 GB GB1224472A patent/GB1375250A/en not_active Expired
- 1972-03-17 JP JP47026696A patent/JPS5221860B1/ja active Pending
- 1972-03-17 DE DE2212967A patent/DE2212967C3/de not_active Expired
- 1972-03-17 FR FR7209521A patent/FR2129777A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3742198A (en) | 1973-06-26 |
NL163643B (nl) | 1980-04-15 |
DE2212967B2 (de) | 1974-07-11 |
IT952219B (it) | 1973-07-20 |
CA991750A (en) | 1976-06-22 |
NL163643C (nl) | 1980-09-15 |
FR2129777A5 (fr) | 1972-10-27 |
NL7203292A (fr) | 1972-09-21 |
DE2212967A1 (de) | 1972-10-12 |
GB1375250A (fr) | 1974-11-27 |
DE2212967C3 (de) | 1975-03-13 |
JPS5221860B1 (fr) | 1977-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: WESTERN ELECTRIC CY INC. Effective date: 19840315 |