DE3485741D1 - Arithmetische verarbeitungseinheit zum ausfuehren einer gleitkommaoperation. - Google Patents

Arithmetische verarbeitungseinheit zum ausfuehren einer gleitkommaoperation.

Info

Publication number
DE3485741D1
DE3485741D1 DE8484116332T DE3485741T DE3485741D1 DE 3485741 D1 DE3485741 D1 DE 3485741D1 DE 8484116332 T DE8484116332 T DE 8484116332T DE 3485741 T DE3485741 T DE 3485741T DE 3485741 D1 DE3485741 D1 DE 3485741D1
Authority
DE
Germany
Prior art keywords
comma
sliding
processing unit
arithmetic processing
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.)
Expired - Lifetime
Application number
DE8484116332T
Other languages
English (en)
Inventor
Hideo C O Nec Corp Tanaka
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.)
NEC Electronics Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3485741D1 publication Critical patent/DE3485741D1/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
    • 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
    • G06F7/499—Denomination or exception handling, e.g. rounding or overflow
    • G06F7/49905—Exception handling
    • G06F7/4991—Overflow or underflow
    • G06F7/49915—Mantissa overflow or underflow in handling floating-point numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Complex Calculations (AREA)
DE8484116332T 1983-12-28 1984-12-27 Arithmetische verarbeitungseinheit zum ausfuehren einer gleitkommaoperation. Expired - Lifetime DE3485741D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58247027A JPS60140422A (ja) 1983-12-28 1983-12-28 演算処理装置

Publications (1)

Publication Number Publication Date
DE3485741D1 true DE3485741D1 (de) 1992-06-25

Family

ID=17157310

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484116332T Expired - Lifetime DE3485741D1 (de) 1983-12-28 1984-12-27 Arithmetische verarbeitungseinheit zum ausfuehren einer gleitkommaoperation.

Country Status (4)

Country Link
US (1) US4719589A (de)
EP (1) EP0164451B1 (de)
JP (1) JPS60140422A (de)
DE (1) DE3485741D1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH069028B2 (ja) * 1986-02-18 1994-02-02 日本電気株式会社 演算装置
JPH0650462B2 (ja) * 1986-02-18 1994-06-29 日本電気株式会社 シフト数制御回路
US4858166A (en) * 1986-09-19 1989-08-15 Performance Semiconductor Corporation Method and structure for performing floating point comparison
JP2600293B2 (ja) * 1988-06-10 1997-04-16 日本電気株式会社 オーバーフロー補正回路
US4994993A (en) * 1988-10-26 1991-02-19 Advanced Micro Devices, Inc. System for detecting and correcting errors generated by arithmetic logic units
US4999802A (en) * 1989-01-13 1991-03-12 International Business Machines Corporation Floating point arithmetic two cycle data flow
US5212662A (en) * 1989-01-13 1993-05-18 International Business Machines Corporation Floating point arithmetic two cycle data flow
US4999803A (en) * 1989-06-29 1991-03-12 Digital Equipment Corporation Floating point arithmetic system and method
US4977535A (en) * 1989-12-08 1990-12-11 Motorola, Inc. Method of computation of normalized numbers
US5136536A (en) * 1990-05-04 1992-08-04 Weitek Corporation Floating-point ALU with parallel paths
EP0551531A1 (de) * 1991-12-20 1993-07-21 International Business Machines Corporation Gerät zur Ausführung von Addierungs-/Substrahierungsoperationen auf IEEE-Standard-Gleitkommazahlen
JPH05216624A (ja) * 1992-02-03 1993-08-27 Mitsubishi Electric Corp 演算装置
US5583805A (en) * 1994-12-09 1996-12-10 International Business Machines Corporation Floating-point processor having post-writeback spill stage
US6275839B1 (en) * 1998-09-22 2001-08-14 International Business Machines Corporation Method and system for immediate exponent normalization in a fast floating point adder
JP2001216136A (ja) * 2000-02-01 2001-08-10 Toshiba Corp 加算回路およびプロセッサ

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277572A (de) * 1961-04-26
US4179734A (en) * 1976-07-02 1979-12-18 Floating Point Systems, Inc. Floating point data processor having fast access memory means
JPS5776634A (en) * 1980-10-31 1982-05-13 Hitachi Ltd Digital signal processor
JPS58186840A (ja) * 1982-04-27 1983-10-31 Hitachi Ltd デ−タ処理装置
JPS5932038A (ja) * 1982-08-13 1984-02-21 Hitachi Ltd 浮動小数点加算器
JPS59188740A (ja) * 1983-04-11 1984-10-26 Hitachi Ltd フロ−テイング加算器
JPS60171534A (ja) * 1984-02-17 1985-09-05 Toshiba Corp 浮動小数点加算回路
US4562553A (en) * 1984-03-19 1985-12-31 Analogic Corporation Floating point arithmetic system and method with rounding anticipation
JPS60263230A (ja) * 1984-06-11 1985-12-26 Toshiba Corp 多重精度浮動小数点加算回路

Also Published As

Publication number Publication date
US4719589A (en) 1988-01-12
JPS60140422A (ja) 1985-07-25
EP0164451A3 (en) 1988-11-17
EP0164451A2 (de) 1985-12-18
EP0164451B1 (de) 1992-05-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: NEC ELECTRONICS CORP., KAWASAKI, KANAGAWA, JP