FR2357958A1 - Dispositif de multiplication des nombres presentes en code complementaire - Google Patents
Dispositif de multiplication des nombres presentes en code complementaireInfo
- Publication number
- FR2357958A1 FR2357958A1 FR7720935A FR7720935A FR2357958A1 FR 2357958 A1 FR2357958 A1 FR 2357958A1 FR 7720935 A FR7720935 A FR 7720935A FR 7720935 A FR7720935 A FR 7720935A FR 2357958 A1 FR2357958 A1 FR 2357958A1
- Authority
- FR
- France
- Prior art keywords
- register
- storing
- control unit
- additional code
- multiplication system
- 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
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
- G06F7/523—Multiplying only
- G06F7/533—Reduction of the number of iteration steps or stages, e.g. using the Booth algorithm, log-sum, odd-even
- G06F7/5334—Reduction of the number of iteration steps or stages, e.g. using the Booth algorithm, log-sum, odd-even by using multiple bit scanning, i.e. by decoding groups of successive multiplier bits in order to select an appropriate precalculated multiple of the multiplicand as a partial product
- G06F7/5336—Reduction of the number of iteration steps or stages, e.g. using the Booth algorithm, log-sum, odd-even by using multiple bit scanning, i.e. by decoding groups of successive multiplier bits in order to select an appropriate precalculated multiple of the multiplicand as a partial product overlapped, i.e. with successive bitgroups sharing one or more bits being recoded into signed digit representation, e.g. using the Modified Booth Algorithm
- G06F7/5338—Reduction of the number of iteration steps or stages, e.g. using the Booth algorithm, log-sum, odd-even by using multiple bit scanning, i.e. by decoding groups of successive multiplier bits in order to select an appropriate precalculated multiple of the multiplicand as a partial product overlapped, i.e. with successive bitgroups sharing one or more bits being recoded into signed digit representation, e.g. using the Modified Booth Algorithm each bitgroup having two new bits, e.g. 2nd order MBA
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762379678A SU651341A1 (ru) | 1976-07-07 | 1976-07-07 | Устройство дл умножени |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2357958A1 true FR2357958A1 (fr) | 1978-02-03 |
| FR2357958B1 FR2357958B1 (enExample) | 1980-03-07 |
Family
ID=20668226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7720935A Granted FR2357958A1 (fr) | 1976-07-07 | 1977-07-07 | Dispositif de multiplication des nombres presentes en code complementaire |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5317043A (enExample) |
| BG (1) | BG29702A1 (enExample) |
| DD (1) | DD131420A1 (enExample) |
| DE (1) | DE2730793A1 (enExample) |
| FR (1) | FR2357958A1 (enExample) |
| GB (1) | GB1540945A (enExample) |
| IN (1) | IN147436B (enExample) |
| PL (1) | PL108592B1 (enExample) |
| RO (1) | RO80742A (enExample) |
| SU (1) | SU651341A1 (enExample) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4334284A (en) * | 1979-12-31 | 1982-06-08 | Sperry Corporation | Multiplier decoding using parallel MQ register |
| JPS57141753A (en) * | 1981-02-25 | 1982-09-02 | Nec Corp | Multiplication circuit |
-
1976
- 1976-07-07 SU SU762379678A patent/SU651341A1/ru active
-
1977
- 1977-07-06 IN IN1026/CAL/77A patent/IN147436B/en unknown
- 1977-07-06 DD DD19992377A patent/DD131420A1/xx unknown
- 1977-07-07 JP JP8049277A patent/JPS5317043A/ja active Pending
- 1977-07-07 FR FR7720935A patent/FR2357958A1/fr active Granted
- 1977-07-07 RO RO7790966A patent/RO80742A/ro unknown
- 1977-07-07 PL PL19944977A patent/PL108592B1/pl not_active IP Right Cessation
- 1977-07-07 GB GB2860577A patent/GB1540945A/en not_active Expired
- 1977-07-07 BG BG7736825A patent/BG29702A1/xx unknown
- 1977-07-07 DE DE19772730793 patent/DE2730793A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DD131420A1 (de) | 1978-06-21 |
| GB1540945A (en) | 1979-02-21 |
| FR2357958B1 (enExample) | 1980-03-07 |
| RO80742A (ro) | 1983-06-01 |
| IN147436B (enExample) | 1980-02-23 |
| DE2730793A1 (de) | 1978-01-19 |
| PL108592B1 (en) | 1980-04-30 |
| BG29702A1 (en) | 1981-01-15 |
| SU651341A1 (ru) | 1979-03-05 |
| PL199449A1 (pl) | 1978-03-28 |
| JPS5317043A (en) | 1978-02-16 |
| RO80742B (ro) | 1983-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |