B.5 Sun Studio 9 Fortran Release:

• Fortran 95 compiler released on x86 Solaris platforms:

  This release of Sun Studio makes the Fortran compiler available on Solaris OS x86 platforms. Compile with -xtarget values generic, native, 386, 486, pentium, pentium_pro, pentium3, or pentium4, to generate executables on Solaris x86 platforms. The default on x86 platforms is -xtarget=generic.

  The following f95 features are not yet implemented on x86 platforms and are only available on SPARC platforms:

  • Interval Arithmetic (compiler options -xia and -xinterval)

  • Quad (128-bit) Arithmetic (for example, REAL*16)

  • IEEE Intrinsic modules IEEE_EXCEPTIONS, IEEE_ARITHMETIC, and IEEE_FEATURES

  • The sun_io_handler module

  • Parallelization options such as -autopar and -openmp.

    The following f95 command-line options are only available on x86 platforms and not on SPARC platforms: -fprecision, -fstore, -nofstore

    The following f95 command-line options are only available on SPARC platforms and not on x86 platforms: -xcode, -xmemalign, -xprefetch, -xcheck, -xia, -xinterval, -xipo, -xjobs, -xlang, -xlinkopt, -xloopinfo, -xpagesize, -xprofile_ircache, -xreduction, -xvector, -depend, -openmp, -autopar, -vpara, -XlistMP. Also, on x86 platforms -fast adds -nofstore.

  Improved Runtime Performance:

  Runtime performance for most applications should improve significantly with this release. For best results, compile with high optimization levels -xO4 or -xO5. At these levels the compiler may now inline contained procedures, and those with assumed-shape, allocatable, or pointer arguments.

• Fortran 2003 Command-Line Intrinsics:

  The Fortran 2003 standard introduces three new intrinsics for processing command-line arguments and environment variables. These have been implemented in this release of the f95 compiler. The new intrinsics are:

  • GET_COMMAND(command, length, status)

    Returns in command the entire command line that invoked the program.

  • GET_COMMAND_ARGUMENT(number, value, length, status)

    Returns a command-line argument in value.

  • GET_ENVIRONMENT_VARIABLE(name, value, length, status, trim_name)

    Return the value of an environment variable.

  New and Changed Command-Line Options:

  The following f95 command-line options are new in this release. See the Chapter 3 for details.

  • -xipo_archive={ none | readonly | writeback }

    Allow crossfile optimization to include archive (.a) libraries. (SPARC only)

  • -xprefetch_auto_type=[no%]indirect_array_access

    Generate indirect prefetches for a data arrays accessed indirectly. (SPARC only)

  • -xprofile_pathmap=collect_prefix:use_prefix

    Set path mapping for profile data files. Use the -xprofile_pathmap option with the -xprofile=use option when profiling into a directory that is not the directory used when previously compiling with -xprofile=collect.

    The following command-line option defaults have changed with this release of f95.

  • The default for -xprefetch is -xprefetch=no%auto,explicit.

  • The default for -xmemalign is -xmemalign=8i; when compiling with one of the -xarch=v9 options the default is -xmemalign=8f.

  • The default for -xcode when compiling with one of the -xarch=v9 options is abs44.

    To compile with the defaults used in previous compiler releases, specify the following options explicitly:

    -xarch=v8 -xmemalign=4s -xprefetch=no for 32-bit compilation -xcode=abs64 -xprefetch=no for 64-bit compilation

  Default SPARC Architecture is V8PLUS:

  The default SPARC architecture is no longer V7. Support for -xarch=v7 is limited in this Sun Studio 9 release. The new default is V8PLUS (UltraSPARC). Compiling with -xarch=v7 is treated as -xarch=v8 because the Solaris 8 OS only supports -xarch=v8 or better.

  To deploy on SPARC V8 systems (for example, SPARCStation 10), compile with -xarch=v8 explicitly. The provided system libraries run on SPARC V8 architectures.

  To deploy on SPARC V7 systems (for example, SPARCStation 1), compile with -xarch=v7 explicitly. The provided system libraries use the SPARC V8 instruction set. For the Sun Studio 9 release, only the Solaris 8 OS supports the SPARC V7 architecture. When a SPARC V8 instruction is encountered, the OS interprets the instruction in software. The program will run, but performance will be degraded.

• OpenMP: Maximum Number of Threads Increased:

  The maximum number of threads for OMP_NUM_THREADS and the multitasking library has increased from 128 to 256.

• OpenMP: Automatic Scoping of Variables:

  This release of the Fortran compiler’s implementation of the OpenMP API for shared-memory parallel programming features automatic scoping of variables in parallel regions. See the OpenMP API User’s Guide for details. (OpenMP is only implemented on SPARC platforms for this release.)