JPH0424730B2 - - Google Patents

Info

Publication number
JPH0424730B2
JPH0424730B2 JP63126066A JP12606688A JPH0424730B2 JP H0424730 B2 JPH0424730 B2 JP H0424730B2 JP 63126066 A JP63126066 A JP 63126066A JP 12606688 A JP12606688 A JP 12606688A JP H0424730 B2 JPH0424730 B2 JP H0424730B2
Authority
JP
Japan
Prior art keywords
sum
pseudo
carry
signal
formula
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
Application number
JP63126066A
Other languages
English (en)
Japanese (ja)
Other versions
JPS649523A (en
Inventor
Uashiriideisu Sutaamatesu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of JPS649523A publication Critical patent/JPS649523A/ja
Publication of JPH0424730B2 publication Critical patent/JPH0424730B2/ja
Granted legal-status Critical Current

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

  • 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)
  • Complex Calculations (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Error Detection And Correction (AREA)
JP63126066A 1987-06-25 1988-05-25 Adder Granted JPS649523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/066,364 US4942548A (en) 1987-06-25 1987-06-25 Parallel adder having removed dependencies

Publications (2)

Publication Number Publication Date
JPS649523A JPS649523A (en) 1989-01-12
JPH0424730B2 true JPH0424730B2 (enExample) 1992-04-27

Family

ID=22069030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63126066A Granted JPS649523A (en) 1987-06-25 1988-05-25 Adder

Country Status (4)

Country Link
US (1) US4942548A (enExample)
EP (1) EP0296344B1 (enExample)
JP (1) JPS649523A (enExample)
DE (1) DE3854284T2 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991015820A1 (en) * 1990-04-04 1991-10-17 International Business Machines Corporation Early scism alu status determination apparatus
JP4531838B2 (ja) 2006-09-28 2010-08-25 富士通株式会社 桁上先見回路および桁上先見方法
US7991820B1 (en) 2007-08-07 2011-08-02 Leslie Imre Sohay One step binary summarizer
WO2010045378A2 (en) * 2008-10-14 2010-04-22 The Research Foundation Of State University Of New York (Sunyrf) Generating partial sums

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5384647A (en) * 1976-12-30 1978-07-26 Fujitsu Ltd High-speed adder for binary and decimal
US4157590A (en) * 1978-01-03 1979-06-05 International Business Machines Corporation Programmable logic array adder
GB2011669B (en) * 1978-01-03 1982-01-13 Ibm Programmable logic array adders
US4348736A (en) * 1978-10-05 1982-09-07 International Business Machines Corp. Programmable logic array adder
IL59907A0 (en) * 1980-04-23 1980-06-30 Nathan Grundland Arithmetic logic unit
US4737926A (en) * 1986-01-21 1988-04-12 Intel Corporation Optimally partitioned regenerative carry lookahead adder

Also Published As

Publication number Publication date
JPS649523A (en) 1989-01-12
EP0296344A2 (en) 1988-12-28
US4942548A (en) 1990-07-17
DE3854284D1 (de) 1995-09-14
EP0296344A3 (en) 1991-01-30
EP0296344B1 (en) 1995-08-09
DE3854284T2 (de) 1996-03-28

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