CN101390045B - 用具可选次精度的浮点处理器执行浮点运算的方法和装置 - Google Patents

用具可选次精度的浮点处理器执行浮点运算的方法和装置 Download PDF

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CN101390045B
CN101390045B CN2007800064904A CN200780006490A CN101390045B CN 101390045 B CN101390045 B CN 101390045B CN 2007800064904 A CN2007800064904 A CN 2007800064904A CN 200780006490 A CN200780006490 A CN 200780006490A CN 101390045 B CN101390045 B CN 101390045B
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excess bits
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CN101390045A (zh
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肯尼思·艾伦·多克塞尔
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    • 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
    • G06F7/499—Denomination or exception handling, e.g. rounding or overflow
    • G06F7/49942—Significance control
    • 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
    • G06F7/483—Computations with numbers represented by a non-linear combination of denominational numbers, e.g. rational numbers, logarithmic number system or floating-point numbers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3287—Power saving characterised by the action undertaken by switching off individual functional units in the computer system
    • 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
    • G06F7/499—Denomination or exception handling, e.g. rounding or overflow
    • 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
    • G06F7/57—Arithmetic logic units [ALU], i.e. arrangements or devices for performing two or more of the operations covered by groups G06F7/483 – G06F7/556 or for performing logical operations
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/30007—Arrangements for executing specific machine instructions to perform operations on data operands
    • G06F9/3001—Arithmetic instructions
    • G06F9/30014—Arithmetic instructions with variable precision
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30098—Register arrangements
    • G06F9/30105—Register structure
    • G06F9/30112—Register structure comprising data of variable length
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30181—Instruction operation extension or modification
    • G06F9/30185—Instruction operation extension or modification according to one or more bits in the instruction, e.g. prefix, sub-opcode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Pure & Applied Mathematics (AREA)
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  • Computational Mathematics (AREA)
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  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
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  • Complex Calculations (AREA)
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CN2007800064904A 2006-02-27 2007-02-27 用具可选次精度的浮点处理器执行浮点运算的方法和装置 Active CN101390045B (zh)

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US11/363,118 US8595279B2 (en) 2006-02-27 2006-02-27 Floating-point processor with reduced power requirements for selectable subprecision
US11/363,118 2006-02-27
PCT/US2007/062908 WO2007101216A2 (en) 2006-02-27 2007-02-27 Floating-point processor with reduced power requirements for selectable subprecision

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CN101390045B true CN101390045B (zh) 2011-12-21

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EP (1) EP1989614A2 (enExample)
JP (4) JP5113089B2 (enExample)
KR (1) KR100994862B1 (enExample)
CN (1) CN101390045B (enExample)
BR (1) BRPI0708284A2 (enExample)
CA (1) CA2641334C (enExample)
MX (1) MX2008010873A (enExample)
RU (1) RU2412462C2 (enExample)
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CA2641334C (en) 2015-07-21
MX2008010873A (es) 2008-09-04
US8595279B2 (en) 2013-11-26
CN101390045A (zh) 2009-03-18
US20070203967A1 (en) 2007-08-30
KR20080098440A (ko) 2008-11-07
EP1989614A2 (en) 2008-11-12
CA2641334A1 (en) 2007-09-07
WO2007101216A2 (en) 2007-09-07
JP2017062804A (ja) 2017-03-30
JP5113089B2 (ja) 2013-01-09
RU2008138564A (ru) 2010-04-10
BRPI0708284A2 (pt) 2011-05-24
WO2007101216A3 (en) 2008-01-03
RU2412462C2 (ru) 2011-02-20
KR100994862B1 (ko) 2010-11-16
JP2012230684A (ja) 2012-11-22
JP2009528638A (ja) 2009-08-06
JP6495220B2 (ja) 2019-04-03
JP2015133111A (ja) 2015-07-23

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