DE3852217D1 - Gerät und Verfahren zur Beschleunigung des effektiven Subtraktionsverfahrens durch die Annäherung des Absolutwerts der Differenz zwischen Exponentargumenten. - Google Patents

Gerät und Verfahren zur Beschleunigung des effektiven Subtraktionsverfahrens durch die Annäherung des Absolutwerts der Differenz zwischen Exponentargumenten.

Info

Publication number
DE3852217D1
DE3852217D1 DE3852217T DE3852217T DE3852217D1 DE 3852217 D1 DE3852217 D1 DE 3852217D1 DE 3852217 T DE3852217 T DE 3852217T DE 3852217 T DE3852217 T DE 3852217T DE 3852217 D1 DE3852217 D1 DE 3852217D1
Authority
DE
Germany
Prior art keywords
approximating
accelerating
difference
absolute value
effective subtraction
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 - Lifetime
Application number
DE3852217T
Other languages
English (en)
Other versions
DE3852217T2 (de
Inventor
Paul E Gronowski
Victor Peng
Nashum Moshe Gavrielov
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.)
Digital Equipment Corp
Original Assignee
Digital Equipment 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 Digital Equipment Corp filed Critical Digital Equipment Corp
Application granted granted Critical
Publication of DE3852217D1 publication Critical patent/DE3852217D1/de
Publication of DE3852217T2 publication Critical patent/DE3852217T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G06F7/483—Computations with numbers represented by a non-linear combination of denominational numbers, e.g. rational numbers, logarithmic number system or floating-point numbers
    • G06F7/485—Adding; Subtracting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/544—Indexing scheme relating to group G06F7/544
    • G06F2207/5442—Absolute difference

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Executing Machine-Instructions (AREA)
  • Complex Calculations (AREA)
DE3852217T 1987-06-19 1988-06-20 Gerät und Verfahren zur Beschleunigung des effektiven Subtraktionsverfahrens durch die Annäherung des Absolutwerts der Differenz zwischen Exponentargumenten. Expired - Lifetime DE3852217T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/064,835 US4858165A (en) 1987-06-19 1987-06-19 Apparatus and method for acceleration of effective subtraction procedures by the approximation of the absolute value of the exponent argument difference

Publications (2)

Publication Number Publication Date
DE3852217D1 true DE3852217D1 (de) 1995-01-12
DE3852217T2 DE3852217T2 (de) 1995-06-08

Family

ID=22058542

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3852217T Expired - Lifetime DE3852217T2 (de) 1987-06-19 1988-06-20 Gerät und Verfahren zur Beschleunigung des effektiven Subtraktionsverfahrens durch die Annäherung des Absolutwerts der Differenz zwischen Exponentargumenten.

Country Status (8)

Country Link
US (1) US4858165A (de)
EP (1) EP0296071B1 (de)
JP (1) JPS6486237A (de)
KR (1) KR940002268B1 (de)
AU (2) AU1813988A (de)
CA (1) CA1294055C (de)
DE (1) DE3852217T2 (de)
IL (1) IL86793A (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0776911B2 (ja) * 1988-03-23 1995-08-16 松下電器産業株式会社 浮動小数点演算装置
US4994996A (en) * 1989-02-03 1991-02-19 Digital Equipment Corporation Pipelined floating point adder for digital computer
US5432727A (en) * 1989-11-02 1995-07-11 Intergraph Corporation Apparatus for computing a sticky bit for a floating point arithmetic unit
JPH0748176B2 (ja) * 1990-01-24 1995-05-24 インターナショナル・ビジネス・マシーンズ・コーポレイション 浮動小数点算術演算方法及び装置
US5117384A (en) * 1990-01-24 1992-05-26 International Business Machines Corporation Method and apparatus for exponent adder
US5166898A (en) * 1990-09-07 1992-11-24 Nec Corporation Shift amount floating-point calculating circuit with a small amount of hardware and rapidly operable
US5247471A (en) * 1991-12-13 1993-09-21 International Business Machines Corporation Radix aligner for floating point addition and subtraction
US5742533A (en) * 1996-05-21 1998-04-21 International Business Machines Corporation Method and apparatus for modulus error checking
US6226271B1 (en) 1997-09-26 2001-05-01 Ericsson Inc. Received signal strength determination method, apparatus and computer program products
US5944774A (en) * 1997-09-26 1999-08-31 Ericsson Inc. Methods apparatus and computer program products for accumulating logarithmic values

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595346A (ja) * 1982-06-30 1984-01-12 Fujitsu Ltd 演算制御方式
JPS59188740A (ja) * 1983-04-11 1984-10-26 Hitachi Ltd フロ−テイング加算器
JPS59226944A (ja) * 1983-06-09 1984-12-20 Fujitsu Ltd 浮動小数点デ−タ加減算方式
CA1229415A (en) * 1983-12-09 1987-11-17 Masayuki Ikeda Floating-point addition/subtraction system
US4639887A (en) * 1984-02-24 1987-01-27 The United States Of America As Represented By The United States Department Of Energy Bifurcated method and apparatus for floating point addition with decreased latency time
US4758974A (en) * 1985-01-29 1988-07-19 American Telephone And Telegraph Company, At&T Bell Laboratories Most significant digit location

Also Published As

Publication number Publication date
JPS6486237A (en) 1989-03-30
CA1294055C (en) 1992-01-07
EP0296071B1 (de) 1994-11-30
EP0296071A2 (de) 1988-12-21
JPH0545980B2 (de) 1993-07-12
AU8809891A (en) 1992-01-23
AU1813988A (en) 1988-12-22
EP0296071A3 (de) 1991-01-30
DE3852217T2 (de) 1995-06-08
KR890000967A (ko) 1989-03-17
US4858165A (en) 1989-08-15
IL86793A0 (en) 1988-11-30
IL86793A (en) 1991-06-10
KR940002268B1 (ko) 1994-03-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER, 80538 MUENCHEN