JPS6461821A - Multiplication circuit - Google Patents
Multiplication circuitInfo
- Publication number
- JPS6461821A JPS6461821A JP62219509A JP21950987A JPS6461821A JP S6461821 A JPS6461821 A JP S6461821A JP 62219509 A JP62219509 A JP 62219509A JP 21950987 A JP21950987 A JP 21950987A JP S6461821 A JPS6461821 A JP S6461821A
- Authority
- JP
- Japan
- Prior art keywords
- register
- multiplier
- circuit
- multiplicand
- bits
- 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
Abstract
PURPOSE:To carry out the multiplication including codes at a high speed by shifting sequentially a multiplier toward the minimum position bit to hold it after totalizing sequentially the partial products and deciding whether all bits of the shifted multiplier are equal to '0' or '1' to decided the end of the totalization. CONSTITUTION:At the outset a multiplier is supplied to a multiplier register 1 together with a multiplicand supplied to a multiplicand register 4, and the triple value of the multiplicand supplied to a multiplicand triple value register 5 respectively. An arithmetic control circuit 11a decodes the low-order 3 bits of the register 1 and total 4 bits of a carrier flag 3 to decide the selection of a selection circuit 6a, the shift number of a barrel shifter 7 and the arithmetic of an arithmetic circuit 9. The circuit 6a selects the triple values of both the multiplier and the multiplicand. The circuit 9 calculates the partial product held by a partial product register 8 and the output of the shifter 7. An end deciding circuit 12 repeats its processing until it is detected that all bits of the register 1 are equal to '0' or '1' and holds the result of multiplication in the register 8. Thus it is possible to decrease the arithmetic frequency needed for the due processing in response to the value of the multiplier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62219509A JP2532505B2 (en) | 1987-09-02 | 1987-09-02 | Multiplication circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62219509A JP2532505B2 (en) | 1987-09-02 | 1987-09-02 | Multiplication circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6461821A true JPS6461821A (en) | 1989-03-08 |
JP2532505B2 JP2532505B2 (en) | 1996-09-11 |
Family
ID=16736574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62219509A Expired - Fee Related JP2532505B2 (en) | 1987-09-02 | 1987-09-02 | Multiplication circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2532505B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4966803A (en) * | 1987-07-23 | 1990-10-30 | Stamicarbon, B.V. | Polymer films partially provided with stiffened segments, process for the production thereof, and the use thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5378742A (en) * | 1976-12-23 | 1978-07-12 | Toshiba Corp | Multiplication control system |
JPS5696330A (en) * | 1979-12-28 | 1981-08-04 | Fujitsu Ltd | Multiplication control system |
JPS59229644A (en) * | 1983-06-10 | 1984-12-24 | Nec Corp | Multiplier |
JPS63198125A (en) * | 1987-02-13 | 1988-08-16 | Nec Corp | Multiplication circuit |
-
1987
- 1987-09-02 JP JP62219509A patent/JP2532505B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5378742A (en) * | 1976-12-23 | 1978-07-12 | Toshiba Corp | Multiplication control system |
JPS5696330A (en) * | 1979-12-28 | 1981-08-04 | Fujitsu Ltd | Multiplication control system |
JPS59229644A (en) * | 1983-06-10 | 1984-12-24 | Nec Corp | Multiplier |
JPS63198125A (en) * | 1987-02-13 | 1988-08-16 | Nec Corp | Multiplication circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4966803A (en) * | 1987-07-23 | 1990-10-30 | Stamicarbon, B.V. | Polymer films partially provided with stiffened segments, process for the production thereof, and the use thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2532505B2 (en) | 1996-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5750049A (en) | Shifting circuit | |
EP0181516A3 (en) | Data processing apparatus having efficient min and max functions | |
GB2314649A (en) | Exponentiation Circuit Utilizing Shift Means and Method of Using Same | |
EP0380100A3 (en) | Multiplier | |
JPS6478323A (en) | Arithmetic unit for trigonometric function using pseudo division system | |
JPS6461821A (en) | Multiplication circuit | |
EP0385568A3 (en) | An arithmetic logic unit for a graphics processor | |
EP0169030A3 (en) | Data processing circuit for calculating either a total sum or a total product of a series of data at a high speed | |
US4173789A (en) | Multiplication control system | |
WO1996038780A3 (en) | Method for performing signed division | |
JPS643734A (en) | Multiplication circuit | |
JPS5672739A (en) | High-speed multiplying circuit | |
JPS5741737A (en) | Dividing device | |
JPS6410325A (en) | Binary multiplication device | |
JPS5663649A (en) | Parallel multiplication apparatus | |
SU748412A1 (en) | Device for multiplying binary numbers | |
JPS57178544A (en) | Multiplication system | |
JPS5764864A (en) | Digital arithmetic circuit | |
JPS5668833A (en) | Shift process system by multiplier | |
JPS5569849A (en) | Multiplication control system | |
JPS54159833A (en) | Decimal multiplier | |
JPS6433672A (en) | Cumulative multiplier | |
SU608156A1 (en) | Multiplier | |
JPS5790780A (en) | Array processor | |
JPS5674762A (en) | Memory unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |