JPH0250492B2 - - Google Patents
Info
- Publication number
- JPH0250492B2 JPH0250492B2 JP56055549A JP5554981A JPH0250492B2 JP H0250492 B2 JPH0250492 B2 JP H0250492B2 JP 56055549 A JP56055549 A JP 56055549A JP 5554981 A JP5554981 A JP 5554981A JP H0250492 B2 JPH0250492 B2 JP H0250492B2
- Authority
- JP
- Japan
- Prior art keywords
- register
- product
- approximate quotient
- quotient
- digit
- 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
Links
- 238000012937 correction Methods 0.000 claims description 76
- 238000001514 detection method Methods 0.000 claims description 33
- 238000004364 calculation method Methods 0.000 claims description 19
- 230000003111 delayed effect Effects 0.000 claims 2
- 230000001934 delay Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 35
- 238000013500 data storage Methods 0.000 description 27
- 239000012536 storage buffer Substances 0.000 description 22
- 239000000872 buffer Substances 0.000 description 13
- 238000007796 conventional method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- G06F7/52—Multiplying; Dividing
- G06F7/535—Dividing only
-
- 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
- G06F2207/38—Indexing scheme relating to groups G06F7/38 - G06F7/575
- G06F2207/3804—Details
- G06F2207/386—Special constructional features
- G06F2207/3884—Pipelining
-
- 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
- G06F2207/535—Indexing scheme relating to groups G06F7/535 - G06F7/5375
- G06F2207/5355—Using iterative approximation not using digit recurrence, e.g. Newton Raphson or Goldschmidt
-
- 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
- G06F7/49942—Significance control
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Complex Calculations (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56055549A JPS57172444A (en) | 1981-04-15 | 1981-04-15 | Approximate quotient correcting circuit |
US06/366,325 US4488247A (en) | 1981-04-15 | 1982-04-07 | Correction circuit for approximate quotient |
DE8282103151T DE3277745D1 (en) | 1981-04-15 | 1982-04-14 | Correction circuit for approximate quotient |
EP82103151A EP0063361B1 (en) | 1981-04-15 | 1982-04-14 | Correction circuit for approximate quotient |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56055549A JPS57172444A (en) | 1981-04-15 | 1981-04-15 | Approximate quotient correcting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57172444A JPS57172444A (en) | 1982-10-23 |
JPH0250492B2 true JPH0250492B2 (US07902200-20110308-C00004.png) | 1990-11-02 |
Family
ID=13001779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56055549A Granted JPS57172444A (en) | 1981-04-15 | 1981-04-15 | Approximate quotient correcting circuit |
Country Status (4)
Country | Link |
---|---|
US (1) | US4488247A (US07902200-20110308-C00004.png) |
EP (1) | EP0063361B1 (US07902200-20110308-C00004.png) |
JP (1) | JPS57172444A (US07902200-20110308-C00004.png) |
DE (1) | DE3277745D1 (US07902200-20110308-C00004.png) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60140428A (ja) * | 1983-12-28 | 1985-07-25 | Hitachi Ltd | 除算装置 |
JPS60142738A (ja) * | 1983-12-30 | 1985-07-27 | Hitachi Ltd | 内挿近似を使用する除算装置 |
JPS60164837A (ja) * | 1984-02-07 | 1985-08-27 | Nec Corp | 除算装置 |
JPS62118474A (ja) * | 1985-11-19 | 1987-05-29 | Hitachi Ltd | ベクトル除算装置の制御方式 |
JPH0754458B2 (ja) * | 1986-08-12 | 1995-06-07 | 日本電気株式会社 | 乗算回路 |
US4881193A (en) * | 1986-09-04 | 1989-11-14 | Hitachi, Ltd. | Rational number operation unit for reduction |
US4785412A (en) * | 1987-07-20 | 1988-11-15 | Control Data Corporation | Double precision approximate quotient network |
GB9708603D0 (en) * | 1996-09-24 | 1997-06-18 | Dandeker Kashinath N | A control switch based on extensions of the recognition of the infinite patterns which mean minus zero |
US7013320B2 (en) * | 2002-01-25 | 2006-03-14 | Intel Corporation | Apparatus and method for remainder calculation using short approximate floating-point quotient |
US8745118B2 (en) * | 2008-02-25 | 2014-06-03 | International Business Machines Corporation | Verifying floating point square root operation results |
US8713084B2 (en) * | 2008-02-25 | 2014-04-29 | International Business Machines Corporation | Method, system and computer program product for verifying floating point divide operation results |
US8402078B2 (en) * | 2008-02-26 | 2013-03-19 | International Business Machines Corporation | Method, system and computer program product for determining required precision in fixed-point divide operations |
US8626816B2 (en) * | 2008-02-26 | 2014-01-07 | International Business Machines Corporation | Method, system and computer program product for detecting errors in fixed point division operation results |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3508038A (en) * | 1966-08-30 | 1970-04-21 | Ibm | Multiplying apparatus for performing division using successive approximate reciprocals of a divisor |
US3648038A (en) * | 1969-04-25 | 1972-03-07 | Ibm | Apparatus and method for obtaining the reciprocal of a number and the quotient of two numbers |
US3633018A (en) * | 1969-12-18 | 1972-01-04 | Ibm | Digital division by reciprocal conversion technique |
US3777132A (en) * | 1972-02-23 | 1973-12-04 | Burroughs Corp | Method and apparatus for obtaining the reciprocal of a number and the quotient of two numbers |
US4364115A (en) * | 1977-07-18 | 1982-12-14 | Hitohisa Asai | Apparatus for digital division computation |
-
1981
- 1981-04-15 JP JP56055549A patent/JPS57172444A/ja active Granted
-
1982
- 1982-04-07 US US06/366,325 patent/US4488247A/en not_active Expired - Lifetime
- 1982-04-14 DE DE8282103151T patent/DE3277745D1/de not_active Expired
- 1982-04-14 EP EP82103151A patent/EP0063361B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4488247A (en) | 1984-12-11 |
EP0063361A2 (en) | 1982-10-27 |
JPS57172444A (en) | 1982-10-23 |
EP0063361B1 (en) | 1987-11-25 |
DE3277745D1 (en) | 1988-01-07 |
EP0063361A3 (en) | 1984-05-09 |
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