JPS5696328A - Logical arithmetic operating device - Google Patents
Logical arithmetic operating deviceInfo
- Publication number
- JPS5696328A JPS5696328A JP17299379A JP17299379A JPS5696328A JP S5696328 A JPS5696328 A JP S5696328A JP 17299379 A JP17299379 A JP 17299379A JP 17299379 A JP17299379 A JP 17299379A JP S5696328 A JPS5696328 A JP S5696328A
- Authority
- JP
- Japan
- Prior art keywords
- operating device
- carry
- adder
- arithmetic operating
- logical arithmetic
- 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
Landscapes
- Logic Circuits (AREA)
Abstract
PURPOSE: To obtain the operation result in a comparatively high speed, by combining a carry preserving adder and a carry propagating adder to obtain a simple logical arithmetic operating device.
CONSTITUTION: The C input of carry preserving adder CSA having three input terminals is made all 0 or all 1, and two A and B inputs are used as operands, and their two outputs D and R are connected to input terminals E and F of carry propagating adder CPA. By making either of input terminals E and F all-zero signals, output of output terminals R and D appear as S as they pass through carry propagating adder CPA without stopping, thus obtaining a simple logical arithmetic operating device.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17299379A JPS5696328A (en) | 1979-12-28 | 1979-12-28 | Logical arithmetic operating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17299379A JPS5696328A (en) | 1979-12-28 | 1979-12-28 | Logical arithmetic operating device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5696328A true JPS5696328A (en) | 1981-08-04 |
JPS618447B2 JPS618447B2 (en) | 1986-03-14 |
Family
ID=15952185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17299379A Granted JPS5696328A (en) | 1979-12-28 | 1979-12-28 | Logical arithmetic operating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5696328A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0451562A2 (en) * | 1990-04-04 | 1991-10-16 | International Business Machines Corporation | Data dependency collapsing hardware apparatus |
EP0478731A1 (en) * | 1990-04-04 | 1992-04-08 | International Business Machines Corporation | Early scism alu status determination apparatus |
USRE35311E (en) * | 1990-04-04 | 1996-08-06 | International Business Machines Corporation | Data dependency collapsing hardware apparatus |
-
1979
- 1979-12-28 JP JP17299379A patent/JPS5696328A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0451562A2 (en) * | 1990-04-04 | 1991-10-16 | International Business Machines Corporation | Data dependency collapsing hardware apparatus |
EP0478731A1 (en) * | 1990-04-04 | 1992-04-08 | International Business Machines Corporation | Early scism alu status determination apparatus |
EP0478745A1 (en) * | 1990-04-04 | 1992-04-08 | International Business Machines Corporation | High performance interlock collapsing scism alu apparatus |
US5299319A (en) * | 1990-04-04 | 1994-03-29 | International Business Machines Corporation | High performance interlock collapsing SCISM ALU apparatus |
USRE35311E (en) * | 1990-04-04 | 1996-08-06 | International Business Machines Corporation | Data dependency collapsing hardware apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS618447B2 (en) | 1986-03-14 |
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