GB1540945A - Apparatus for multiplying numbers - Google Patents
Apparatus for multiplying numbersInfo
- Publication number
- GB1540945A GB1540945A GB2860577A GB2860577A GB1540945A GB 1540945 A GB1540945 A GB 1540945A GB 2860577 A GB2860577 A GB 2860577A GB 2860577 A GB2860577 A GB 2860577A GB 1540945 A GB1540945 A GB 1540945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- multiplying numbers
- multiplying
- numbers
- 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
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
- G06F7/52—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 (en) | 1976-07-07 | 1976-07-07 | Multiplying arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1540945A true GB1540945A (en) | 1979-02-21 |
Family
ID=20668226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2860577A Expired GB1540945A (en) | 1976-07-07 | 1977-07-07 | Apparatus for multiplying numbers |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5317043A (en) |
BG (1) | BG29702A1 (en) |
DD (1) | DD131420A1 (en) |
DE (1) | DE2730793A1 (en) |
FR (1) | FR2357958A1 (en) |
GB (1) | GB1540945A (en) |
IN (1) | IN147436B (en) |
PL (1) | PL108592B1 (en) |
RO (1) | RO80742A (en) |
SU (1) | SU651341A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0058997A1 (en) * | 1981-02-25 | 1982-09-01 | Nec Corporation | Digital processing circuit having a multiplication function |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4334284A (en) * | 1979-12-31 | 1982-06-08 | Sperry Corporation | Multiplier decoding using parallel MQ register |
-
1976
- 1976-07-07 SU SU762379678A patent/SU651341A1/en active
-
1977
- 1977-07-06 IN IN1026/CAL/77A patent/IN147436B/en unknown
- 1977-07-06 DD DD19992377A patent/DD131420A1/en unknown
- 1977-07-07 FR FR7720935A patent/FR2357958A1/en active Granted
- 1977-07-07 GB GB2860577A patent/GB1540945A/en not_active Expired
- 1977-07-07 JP JP8049277A patent/JPS5317043A/en active Pending
- 1977-07-07 BG BG7736825A patent/BG29702A1/en unknown
- 1977-07-07 DE DE19772730793 patent/DE2730793A1/en not_active Ceased
- 1977-07-07 PL PL19944977A patent/PL108592B1/en not_active IP Right Cessation
- 1977-07-07 RO RO7790966A patent/RO80742A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0058997A1 (en) * | 1981-02-25 | 1982-09-01 | Nec Corporation | Digital processing circuit having a multiplication function |
Also Published As
Publication number | Publication date |
---|---|
RO80742B (en) | 1983-05-30 |
DD131420A1 (en) | 1978-06-21 |
JPS5317043A (en) | 1978-02-16 |
RO80742A (en) | 1983-06-01 |
DE2730793A1 (en) | 1978-01-19 |
PL199449A1 (en) | 1978-03-28 |
IN147436B (en) | 1980-02-23 |
FR2357958A1 (en) | 1978-02-03 |
PL108592B1 (en) | 1980-04-30 |
FR2357958B1 (en) | 1980-03-07 |
SU651341A1 (en) | 1979-03-05 |
BG29702A1 (en) | 1981-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |