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GB2400938B - Method and apparatus for performing lazy byteswapping optimizations during program code conversion - Google Patents

Method and apparatus for performing lazy byteswapping optimizations during program code conversion

Info

Publication number
GB2400938B
GB2400938B GB0320718A GB0320718A GB2400938B GB 2400938 B GB2400938 B GB 2400938B GB 0320718 A GB0320718 A GB 0320718A GB 0320718 A GB0320718 A GB 0320718A GB 2400938 B GB2400938 B GB 2400938B
Authority
GB
United Kingdom
Prior art keywords
program code
code conversion
during program
optimizations during
lazy byteswapping
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
GB0320718A
Other versions
GB2400938A (en
GB0320718D0 (en
Inventor
William Owen Lovett
Alex Brown
Gavin Barraclough
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.)
Transitive Ltd
Original Assignee
Transitive Ltd
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
Priority claimed from GBGB0309056.0A external-priority patent/GB0309056D0/en
Application filed by Transitive Ltd filed Critical Transitive Ltd
Publication of GB0320718D0 publication Critical patent/GB0320718D0/en
Priority to US10/735,402 priority Critical patent/US7200841B2/en
Priority to TW093111118A priority patent/TWI317504B/en
Priority to PCT/GB2004/001744 priority patent/WO2004095265A2/en
Publication of GB2400938A publication Critical patent/GB2400938A/en
Application granted granted Critical
Publication of GB2400938B publication Critical patent/GB2400938B/en
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
    • 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
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45504—Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators
    • G06F9/45516—Runtime code conversion or optimisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/40—Transformation of program code
    • G06F8/41—Compilation
    • G06F8/44—Encoding
    • G06F8/443—Optimisation
    • G06F8/4434—Reducing the memory space required by the program code
    • G06F8/4435—Detection or removal of dead or redundant code
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
    • G06F9/3836—Instruction issuing, e.g. dynamic instruction scheduling or out of order instruction execution
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
    • G06F9/3854—Instruction completion, e.g. retiring, committing or graduating
    • G06F9/3858—Result writeback, i.e. updating the architectural state or memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Executing Special Programs (AREA)
GB0320718A 2003-04-22 2003-09-04 Method and apparatus for performing lazy byteswapping optimizations during program code conversion Expired - Lifetime GB2400938B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/735,402 US7200841B2 (en) 2003-04-22 2003-12-12 Method and apparatus for performing lazy byteswapping optimizations during program code conversion
TW093111118A TWI317504B (en) 2003-04-22 2004-04-21 Method, apparatus and computer-readable storage medium having computer-readable code executable for performing lazy byteswapping optimizations during program code conversion
PCT/GB2004/001744 WO2004095265A2 (en) 2003-04-22 2004-04-22 Method and apparatus for performing lazy byteswapping optimizations during program code conversion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0309056.0A GB0309056D0 (en) 2003-04-22 2003-04-22 Block translation optimizations for program code conversion
GBGB0315164.4A GB0315164D0 (en) 2003-04-22 2003-06-30 Block translation optimizations for program code conversion

Publications (3)

Publication Number Publication Date
GB0320718D0 GB0320718D0 (en) 2003-10-08
GB2400938A GB2400938A (en) 2004-10-27
GB2400938B true GB2400938B (en) 2005-07-06

Family

ID=29252470

Family Applications (3)

Application Number Title Priority Date Filing Date
GB0320718A Expired - Lifetime GB2400938B (en) 2003-04-22 2003-09-04 Method and apparatus for performing lazy byteswapping optimizations during program code conversion
GB0320716A Expired - Lifetime GB2400937B (en) 2003-04-22 2003-09-04 Method and apparatus for performing interpreter optimizations during program code conversion
GB0322323A Expired - Lifetime GB2400939B (en) 2003-04-22 2003-09-24 Partial dead code elimination optimizations for program code conversion

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB0320716A Expired - Lifetime GB2400937B (en) 2003-04-22 2003-09-04 Method and apparatus for performing interpreter optimizations during program code conversion
GB0322323A Expired - Lifetime GB2400939B (en) 2003-04-22 2003-09-24 Partial dead code elimination optimizations for program code conversion

Country Status (2)

Country Link
GB (3) GB2400938B (en)
HK (2) HK1066292A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0316532D0 (en) * 2003-07-15 2003-08-20 Transitive Ltd Method and apparatus for partitioning code in program code conversion
US7934204B2 (en) 2003-07-15 2011-04-26 International Business Machines Corporation Partitioning code in program code conversion
EP1752874A1 (en) 2005-07-19 2007-02-14 Alcatel Adaptive evolutionary computer software product

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867690A (en) * 1996-05-23 1999-02-02 Advanced Micro Devices, Inc. Apparatus for converting data between different endian formats and system and method employing same
US5970236A (en) * 1995-11-14 1999-10-19 Compaq Computer Corporation Circuit for selectively performing data format conversion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5507030A (en) * 1991-03-07 1996-04-09 Digitial Equipment Corporation Successive translation, execution and interpretation of computer program having code at unknown locations due to execution transfer instructions having computed destination addresses
US5966539A (en) * 1994-03-01 1999-10-12 Digital Equipment Corporation Link time optimization with translation to intermediate program and following optimization techniques including program analysis code motion live variable set generation order analysis, dead code elimination and load invariant analysis
US6880152B1 (en) * 1999-10-13 2005-04-12 Transmeta Corporation Method of determining a mode of code generation
US6484188B1 (en) * 1999-12-30 2002-11-19 Intel Corporation Optimization of garbage collection code in the context of raw native interface function calls in the java programming language
GB2367652B (en) * 2000-10-05 2004-08-11 Advanced Risc Mach Ltd Scheduling control within a system having mixed hardware and software based instruction execution

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5970236A (en) * 1995-11-14 1999-10-19 Compaq Computer Corporation Circuit for selectively performing data format conversion
US5867690A (en) * 1996-05-23 1999-02-02 Advanced Micro Devices, Inc. Apparatus for converting data between different endian formats and system and method employing same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Executor Internals: How to Efficiently Run Mac Programs on PCs", 1996, M Hostetter and C Matthews, obtained from http://www.ardi.com/MacHack_96.html *
www.ardi.com/SysPaper/node5.html *

Also Published As

Publication number Publication date
HK1066292A1 (en) 2005-03-18
GB2400937A (en) 2004-10-27
GB2400939A (en) 2004-10-27
GB2400937B (en) 2005-05-18
GB0320716D0 (en) 2003-10-08
GB2400938A (en) 2004-10-27
GB0320718D0 (en) 2003-10-08
HK1066290A1 (en) 2005-03-18
GB2400939B (en) 2005-11-16
GB0322323D0 (en) 2003-10-22

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Expiry date: 20230903