JPS5312773B2 - - Google Patents
Info
- Publication number
- JPS5312773B2 JPS5312773B2 JP12154373A JP12154373A JPS5312773B2 JP S5312773 B2 JPS5312773 B2 JP S5312773B2 JP 12154373 A JP12154373 A JP 12154373A JP 12154373 A JP12154373 A JP 12154373A JP S5312773 B2 JPS5312773 B2 JP S5312773B2
- Authority
- JP
- Japan
- 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 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
- G06F7/50—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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Logic Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00302228A US3805045A (en) | 1972-10-30 | 1972-10-30 | Binary carry lookahead adder using redundancy terms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4996646A JPS4996646A (en:Method) | 1974-09-12 |
| JPS5312773B2 true JPS5312773B2 (en:Method) | 1978-05-04 |
Family
ID=23166858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12154373A Expired JPS5312773B2 (en:Method) | 1972-10-30 | 1973-10-29 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3805045A (en:Method) |
| JP (1) | JPS5312773B2 (en:Method) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993891A (en) * | 1975-07-03 | 1976-11-23 | Burroughs Corporation | High speed parallel digital adder employing conditional and look-ahead approaches |
| JPS5384647A (en) * | 1976-12-30 | 1978-07-26 | Fujitsu Ltd | High-speed adder for binary and decimal |
| US4099248A (en) * | 1977-01-28 | 1978-07-04 | Sperry Rand Corporation | One's complement subtractive arithmetic unit utilizing two's complement arithmetic circuits |
| US4229803A (en) * | 1978-06-02 | 1980-10-21 | Texas Instruments Incorporated | I2 L Full adder and ALU |
| US4263660A (en) * | 1979-06-20 | 1981-04-21 | Motorola, Inc. | Expandable arithmetic logic unit |
| IL59907A0 (en) * | 1980-04-23 | 1980-06-30 | Nathan Grundland | Arithmetic logic unit |
| EP0042452B1 (en) * | 1980-06-24 | 1984-03-14 | International Business Machines Corporation | Signal processor computing arrangement and method of operating said arrangement |
| US5166899A (en) * | 1990-07-18 | 1992-11-24 | Hewlett-Packard Company | Lookahead adder |
| US5150321A (en) * | 1990-12-24 | 1992-09-22 | Allied-Signal Inc. | Apparatus for performing serial binary multiplication |
| US5278783A (en) * | 1992-10-30 | 1994-01-11 | Digital Equipment Corporation | Fast area-efficient multi-bit binary adder with low fan-out signals |
| US5508952A (en) * | 1993-10-19 | 1996-04-16 | Kantabutra; Vitit | Carry-lookahead/carry-select binary adder |
| US5619441A (en) * | 1994-10-14 | 1997-04-08 | International Business Machines Corporation | High speed dynamic binary incrementer |
| US5964827A (en) * | 1997-11-17 | 1999-10-12 | International Business Machines Corporation | High-speed binary adder |
| US7207037B2 (en) * | 1999-11-12 | 2007-04-17 | Sun Microsystems, Inc. | Overflow sensitive arithmetic instruction optimization using chaining |
| US8453133B2 (en) * | 1999-11-12 | 2013-05-28 | Oracle America, Inc. | Optimization of N-base typed arithmetic instructions via rework |
| US7107581B2 (en) * | 1999-11-12 | 2006-09-12 | Sun Microsystems, Inc. | Overflow predictive arithmetic instruction optimization using chaining |
| US7010786B2 (en) | 1999-11-12 | 2006-03-07 | Sun Microsystems, Inc. | Predictive arithmetic overflow detection |
| US6363523B1 (en) * | 1999-11-12 | 2002-03-26 | Sun Microsystems, Inc. | Optimization of N-base typed arithmetic expressions |
| US6598066B1 (en) * | 2000-05-23 | 2003-07-22 | Sun Microsystems, Inc. | Fast carry-out generation |
| JP2009301210A (ja) * | 2008-06-11 | 2009-12-24 | Tokyo Denki Univ | Ｎ桁減算器ユニット、ｎ桁減算器モジュール、ｎ桁加算器ユニット及びｎ桁加算器モジュール |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1145676A (en) * | 1966-09-28 | 1969-03-19 | Nippon Electric Co | High speed adder circuit |
| US3697735A (en) * | 1969-07-22 | 1972-10-10 | Burroughs Corp | High-speed parallel binary adder |
| DE2007353C3 (de) * | 1970-02-18 | 1973-11-29 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Vierteiliges Addierwerk |
-
1972
- 1972-10-30 US US00302228A patent/US3805045A/en not_active Expired - Lifetime
-
1973
- 1973-10-29 JP JP12154373A patent/JPS5312773B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3805045A (en) | 1974-04-16 |
| JPS4996646A (en:Method) | 1974-09-12 |