Migrating an Application from OpenVMS VAX to OpenVMS Alpha

• Editors
  • unchanged for Alpha
• $ENQ system service #1
• $ENQ system service #2
• Evaluating code
  • checklist
• Exception handling
  • See Condition handling
• Exception reporting
  • compiler options
  • immediacy of
  • precise
  • reliance on architectural details of
• Executive images
  • slicing
• $EXPREG system service
  • allocating memory on Alpha systems
  • code example
  • page-size dependencies

• File
  • data type differences
• File status values
  • DEC COBOL support for
  • differences
• File types
  • on Alpha systems
• Flag-passing protocols
  • for synchronization
• flags
  • with no VAX COBOL equivalent qualifiers
• /FLOAT qualifier
  • DEC COBOL support for
  • specifying floating-point format in DEC C
• Floating-point data types
  • comparison of VAX and Alpha types
  • comparison of VAX and Alpha types
  • converting H_floating data
  • CVT$CONVERT_FLOAT RTL routine
  • differences between Digital Fortran 77 for OpenVMS VAX Systems and Digital Fortran for OpenVMS Alpha
  • locating references
  • supported by DEC Ada
  • supported by DEC C
  • supported by DEC Pascal
  • VAX little-endian formats
• Fortran
  • /CHECK qualifier
  • qualifier needed for translated image support
• free routine
  • memory allocation

• Generating VAX instructions at run time #1
• Generating VAX instructions at run time #2
• Generating VAX instructions at run time #3
• $GETJPI system service
  • page-size dependencies
• $GETQUI system service
  • page-size dependencies
• $GETSYI system service
  • determining host architecture
  • obtaining the system page size
  • page-size dependencies
• $GETUAI system service
  • page-size dependencies
• Global sections
  • alignment of
  • creating
  • mapping
  • writable
• Global symbol tables
  • See GSTs
• Granularity #1
• Granularity #2
  • of byte and word operations #1
  • of byte and word operations #2
  • VEST qualifiers
    • memory
• GSTs (Global symbol tables)
• G_floating data type #1
• G_floating data type #2

• .H files
  • from SYS$STARLET_C.TLB to support DECthreads
  • provided by SYS$STARLET_C.TLB
• Handling record operations
  • using RMS special registers
• Heap Analyzer
• HW_MODEL keyword
  • determining the host architecture
• H_floating data type #1
• H_floating data type #2
• H_floating data type #3
• H_floating data type #4
• H_floating data type #5

• I/O operations
  • differences with RMS special registers
• IEEE data types
  • little endian
• IEEE floating-point data types
  • supported by DEC Ada
  • supported by DEC C
• IIFs (image information files)
  • provided with Alpha software #1
  • provided with Alpha software #2
• Image information files
  • See IIFs #1
  • See IIFs #2
• Images
  • creating
  • translated
    • condition handling
    • creating
    • preserving atomicity in
    • replacing with native Alpha image
    • using in a link operation
• Imprecise exception reporting
• inadr argument
  • used with $CRETVA system service
• Include files
  • for C programs
• Initializing data structures
  • DEC C incompatibility with VAX C
• Inner access modes #1
• Inner access modes #2
• INSQUEx instruction
  • accessing from DEC C
• Instruction stream
  • inspecting
• Instructions
  • atomicity
    • provided by PALcode
    • VEST qualifiers
  • memory barrier
  • multiple instruction issue
  • out-of-order completion
  • parallel execution
• Interlocked instructions
  • supported by DEC C
• Interoperability
  • between native and translated images
  • compile-time considerations
  • compiling native Alpha images
  • confirming
  • controlling the layout of symbol vectors
  • creating native images that can be called by translated images
  • creating native images that can call translated images
  • creating stub images
  • linking native Alpha images
  • of native Alpha and translated images #1
  • of native Alpha and translated images #2
  • of native Alpha and translated images #3
  • of translated and native images
  • using the /BPAGE qualifier
• Interrupt priority level
  • See IPL
• IPL (interrupt priority level)
  • elevated
  • retained on Alpha

• Jacket routines #1
• Jacket routines #2
  • created automatically
  • creating stub images
  • writing for nonstandard calls
• JSB VAX instruction #1
• JSB VAX instruction #2

• Language Sensitive Editor (LSE)
  • Program Design Facility (PDF)
    • unsupported by DEC COBOL
• Languages, programming
  • See programming languages
• $LCKPAG system service
  • page-size dependencies
• LIB$ESTABLISH routine #1
• LIB$ESTABLISH routine #2
• LIB$ESTABLISH routine #3
• LIB$ESTABLISH routine #4
• LIB$ESTABLISH routine #5
  • support on Alpha systems
• LIB$FIND_IMAGE_SYMBOL routine
• LIB$FREE_VM_PAGE routine
  • page-size dependencies
• LIB$GET_VM_PAGE routine
  • page-size dependencies
• LIB$MATCH_COND routine
• LIB$REVERT routine #1
• LIB$REVERT routine #2
• Librarian utility (LIBRARIAN)
  • native Alpha
• Library (LIB$) routines
  • LIB$ESTABLISH
  • LIB$REVERT
  • not on Alpha
• LINAGE clause
  • differences
    • handling large values
    • using with WRITE statement
• Link commands
  • changes required
• Link procedures
• Linker utility
  • /BPAGE option
  • commands
  • default page size
  • features specific to OpenVMS Alpha
  • native Alpha
  • /NONATIVE_ONLY option
  • options file changes
• Linking
  • creating native Alpha images
  • creating native images that can call translated images
• Listing files
  • separate compilation
• Little-endian data types
• $LKWSET system service
  • page-size dependencies #1
  • page-size dependencies #2
• Load locked instruction (LDxL)
• Load/store operations
• Locking mechanisms
  • for accessing byte variables
• Locking pages
  • page-size dependencies
• Locking services
  • $DEQ #1
  • $DEQ #2
  • $ENQ #1
  • $ENQ #2
• Logic errors
  • finding them in programs
• Logical names
  • for tools and files
  • run-time libraries
  • systemwide definitions

• Machine code in listings
• Machine instructions
  • creating
• MACRO--32 compiler
• MACRO--64 assembler
• MACRO code
  • replacing
• malloc routine
  • memory allocation
• Managing code migration
• Mapping memory
  • See Memory mapping
• Mapping sections
  • into expanded virtual address space
    • page-size dependencies
  • mapping a single page
    • page-size dependencies
  • mapping into a defined address range
    • page-size dependencies
• Mathematic routines
  • compatibility
• MB instruction
  • accessing from DEC C
• Mechanism array
  • format
  • reliance on architectural details of
  • using the depth argument
• /MEMBER_ALIGNMENT qualifier
  • controlling data alignment in DEC C
• Memory allocation
  • by expanding virtual address space
    • page-size dependencies
  • finding page-size dependencies in
  • freeing allocated memory
    • page-size dependencies
  • page-size dependencies
  • reallocating existing virtual addresses
    • page-size dependencies
  • specifying address ranges
  • specifying page counts
  • using the $CRETVA system service
  • using the $EXPREG system service
• Memory barrier
  • See MB instruction
• Memory barrier instructions
• Memory locking
  • page-size dependencies #1
  • page-size dependencies #2
• Memory management functions
  • page-size dependencies
  • page-size dependencies
    • summary
• Memory-management system services
• Memory mapping
  • into expanded virtual address space
    • page-size dependencies
  • mapping a single page
    • page-size dependencies
  • mapping into a defined address range
    • page-size dependencies
    • required changes
  • page-size dependencies
  • using the $CRMPSC system service
• Memory protection
  • page-size dependencies
  • page size granularity
• Message utility (MESSAGE)
  • native Alpha
• $MGBLSC system service #1
• $MGBLSC system service #2
  • page-size dependencies
• Migrating
  • ease of
  • privileged code
  • third-party products
  • user-mode code #1
  • user-mode code #2
• Migration Assessment Service
• Migration methods
  • and program architectural dependencies
  • comparison of
  • for user-mode code
  • illustration of
  • selecting #1
  • selecting #2
• Migration planning
  • services
• Migration services
  • Application Migration
  • Application Migration Detailed Analysis
  • Migration Assessment
  • System Migration
  • System Migration Detailed Analysis
• Migration tools
• Mixing native Alpha and translated images
  • as a stage in migration
  • possibility of
• MMS (Module Management System) #1
• MMS (Module Management System) #2
• Module Management System
  • See MMS
• Module names
• MOVE statement
  • differences
    • referencing signed data items
    • referencing unsigned data items
  • differences (ex.)
• Moving
  • signed data items
    • size considerations
  • unsigned data items
    • size considerations
• MTH$ routines
  • compatibility
• MTH$ RTL
  • double-precision floating-point functions invoked by translated images
  • translated
• Multiple instruction issue
• Multiprocessing

  6459PI01.HTM
  OSSG Documentation
  22-NOV-1996 13:07:30.52

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