HK57290A - Optimally partitioned regenerative carry lookahead adder - Google Patents
Optimally partitioned regenerative carry lookahead adderInfo
- Publication number
- HK57290A HK57290A HK572/90A HK57290A HK57290A HK 57290 A HK57290 A HK 57290A HK 572/90 A HK572/90 A HK 572/90A HK 57290 A HK57290 A HK 57290A HK 57290 A HK57290 A HK 57290A
- Authority
- HK
- Hong Kong
- Prior art keywords
- carry lookahead
- lookahead adder
- optimally partitioned
- regenerative
- partitioned regenerative
- 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
- G06F7/50—Adding; Subtracting
-
- 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
- G06F7/50—Adding; Subtracting
- G06F7/505—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination
- G06F7/506—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination with simultaneous carry generation for, or propagation over, two or more stages
- G06F7/508—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination with simultaneous carry generation for, or propagation over, two or more stages using carry look-ahead circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Computing Systems (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Logic Circuits (AREA)
- Design And Manufacture Of Integrated Circuits (AREA)
- Complex Calculations (AREA)
- Dc Digital Transmission (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/820,384 US4737926A (en) | 1986-01-21 | 1986-01-21 | Optimally partitioned regenerative carry lookahead adder |
Publications (1)
Publication Number | Publication Date |
---|---|
HK57290A true HK57290A (en) | 1990-08-10 |
Family
ID=25230620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK572/90A HK57290A (en) | 1986-01-21 | 1990-08-02 | Optimally partitioned regenerative carry lookahead adder |
Country Status (8)
Country | Link |
---|---|
US (1) | US4737926A (de) |
JP (1) | JP2594428B2 (de) |
KR (1) | KR940008613B1 (de) |
CN (1) | CN1003678B (de) |
DE (1) | DE3700991C2 (de) |
GB (1) | GB2185605B (de) |
HK (1) | HK57290A (de) |
SG (1) | SG34590G (de) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4942548A (en) * | 1987-06-25 | 1990-07-17 | International Business Machines Corporation | Parallel adder having removed dependencies |
US4993073A (en) * | 1987-10-01 | 1991-02-12 | Sparkes Kevin J | Digital signal mixing apparatus |
AU3289889A (en) * | 1988-02-29 | 1989-09-22 | Chopp Computer Corporation | Carry generation method and apparatus |
US5122982A (en) * | 1988-02-29 | 1992-06-16 | Chopp Computer Corporation | Carry generation method and apparatus |
US4924423A (en) * | 1988-04-25 | 1990-05-08 | International Business Machines Corporation | High speed parity prediction for binary adders using irregular grouping scheme |
US4905180A (en) * | 1988-12-16 | 1990-02-27 | Intel Corporation | MOS adder with minimum pass gates in carry line |
US5136539A (en) * | 1988-12-16 | 1992-08-04 | Intel Corporation | Adder with intermediate carry circuit |
JPH02245926A (ja) * | 1989-03-20 | 1990-10-01 | Fujitsu Ltd | 論理回路 |
EP0609372A1 (de) * | 1991-10-24 | 1994-08-10 | Intel Corporation | Architektur für videosignalverarbeitung. |
US5361370A (en) * | 1991-10-24 | 1994-11-01 | Intel Corporation | Single-instruction multiple-data processor having dual-ported local memory architecture for simultaneous data transmission on local memory ports and global port |
JPH0651950A (ja) * | 1992-07-30 | 1994-02-25 | Mitsubishi Electric Corp | 加算回路 |
EP0590251A2 (de) * | 1992-09-22 | 1994-04-06 | Motorola, Inc. | Hochgeschwindigkeitsaddierer |
US5483478A (en) * | 1992-10-16 | 1996-01-09 | Xilinx, Inc. | Method and structure for reducing carry delay for a programmable carry chain |
US5337269A (en) * | 1993-03-05 | 1994-08-09 | Cyrix Corporation | Carry skip adder with independent carry-in and carry skip paths |
US5327369A (en) * | 1993-03-31 | 1994-07-05 | Intel Corporation | Digital adder and method for adding 64-bit, 16-bit and 8-bit words |
US5508952A (en) * | 1993-10-19 | 1996-04-16 | Kantabutra; Vitit | Carry-lookahead/carry-select binary adder |
GB2293665A (en) * | 1994-09-29 | 1996-04-03 | Texas Instruments Ltd | A look-ahead scheme. |
US5581497A (en) * | 1994-10-17 | 1996-12-03 | Intel Corporation | Carry skip adder with enhanced grouping scheme |
US5701504A (en) * | 1994-12-28 | 1997-12-23 | Intel Corporation | Apparatus and method for addition based on Kogge-Stone parallel algorithm |
US5619442A (en) * | 1995-04-07 | 1997-04-08 | National Semiconductor Corporation | Alternating polarity carry look ahead adder circuit |
US5978826A (en) * | 1995-12-01 | 1999-11-02 | Lucent Techologies Inc. | Adder with even/odd 1-bit adder cells |
US5854918A (en) * | 1996-01-24 | 1998-12-29 | Ricoh Company Ltd. | Apparatus and method for self-timed algorithmic execution |
US5835782A (en) * | 1996-03-04 | 1998-11-10 | Intel Corporation | Packed/add and packed subtract operations |
US6205463B1 (en) * | 1997-05-05 | 2001-03-20 | Intel Corporation | Fast 2-input 32-bit domino adder |
US6735612B1 (en) * | 1997-06-24 | 2004-05-11 | International Business Machines Corporation | Carry skip adder |
US6405233B1 (en) | 1999-06-30 | 2002-06-11 | Intel Corporation | Unaligned semaphore adder |
DE10050589B4 (de) | 2000-02-18 | 2006-04-06 | Hewlett-Packard Development Co., L.P., Houston | Vorrichtung und Verfahren zur Verwendung beim Durchführen einer Gleitkomma-Multiplizier-Akkumulier-Operation |
US6539413B1 (en) * | 2000-03-15 | 2003-03-25 | Agere Systems Inc. | Prefix tree adder with efficient sum generation |
US20030065696A1 (en) * | 2001-09-28 | 2003-04-03 | Ruehle Michael D. | Method and apparatus for performing modular exponentiation |
US6922717B2 (en) | 2001-09-28 | 2005-07-26 | Intel Corporation | Method and apparatus for performing modular multiplication |
US7325025B2 (en) * | 2001-12-18 | 2008-01-29 | Intel Corporation | Look-ahead carry adder circuit |
US7516173B2 (en) * | 2004-08-04 | 2009-04-07 | Intel Corporation | Carry-skip adder having merged carry-skip cells with sum cells |
KR100867641B1 (ko) * | 2006-07-31 | 2008-11-10 | 삼성전자주식회사 | 조건 선택 가산기 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL213922A (de) * | 1957-01-22 | |||
US3697735A (en) * | 1969-07-22 | 1972-10-10 | Burroughs Corp | High-speed parallel binary adder |
US3700857A (en) * | 1971-04-14 | 1972-10-24 | Bell Telephone Labor Inc | Electrical resistance heater |
JPS5068036A (de) * | 1973-10-16 | 1975-06-07 | ||
US3987291A (en) * | 1975-05-01 | 1976-10-19 | International Business Machines Corporation | Parallel digital arithmetic device having a variable number of independent arithmetic zones of variable width and location |
IL59907A0 (en) * | 1980-04-23 | 1980-06-30 | Nathan Grundland | Arithmetic logic unit |
JPS6055438A (ja) * | 1983-09-05 | 1985-03-30 | Matsushita Electric Ind Co Ltd | 2入力加算器 |
US4623981A (en) * | 1983-09-20 | 1986-11-18 | Digital Equipment Corporation | ALU with carry length detection |
DE3481559D1 (de) * | 1983-12-27 | 1990-04-12 | Nec Corp | Eine, fuer eine arithmetische operation hoher geschwindigkeit geeignete, uebertragsschaltung. |
-
1986
- 1986-01-21 US US06/820,384 patent/US4737926A/en not_active Expired - Lifetime
- 1986-10-08 GB GB8624162A patent/GB2185605B/en not_active Expired
- 1986-11-05 KR KR1019860009312A patent/KR940008613B1/ko not_active IP Right Cessation
-
1987
- 1987-01-14 JP JP62005166A patent/JP2594428B2/ja not_active Expired - Lifetime
- 1987-01-15 DE DE3700991A patent/DE3700991C2/de not_active Expired - Fee Related
- 1987-01-17 CN CN87100346.5A patent/CN1003678B/zh not_active Expired
-
1990
- 1990-05-15 SG SG345/90A patent/SG34590G/en unknown
- 1990-08-02 HK HK572/90A patent/HK57290A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3700991A1 (de) | 1987-07-23 |
KR870007460A (ko) | 1987-08-19 |
JP2594428B2 (ja) | 1997-03-26 |
JPS62172429A (ja) | 1987-07-29 |
CN1003678B (zh) | 1989-03-22 |
GB2185605A (en) | 1987-07-22 |
DE3700991C2 (de) | 1996-02-01 |
GB2185605B (en) | 1989-10-25 |
CN87100346A (zh) | 1987-08-19 |
KR940008613B1 (ko) | 1994-09-24 |
GB8624162D0 (en) | 1986-11-12 |
SG34590G (en) | 1990-07-13 |
US4737926A (en) | 1988-04-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |