XLF_INTRINSICS
Examples of IBM XLF Intrinsic Functions

XLF_INTRINSICS is a FORTAN90 program which demonstrates the use and features of some of the intrinsic routines peculiar to the IBM XLF FORTRAN compiler.

These functions are not listed in the FORTRAN standard; they are in some cases commonly available in C or C++ compilers.

Related Data and Programs:

C is a directory which includes some examples on features of the C language.

CPP is a directory which includes some examples on features of the C++ language.

F77 is a directory which includes some examples on features of the FORTRAN77 language.

F77_INTRINSICS is a directory which includes some examples of the use of intrinsic functions included with the FORTRAN77 standard language.

F90 is a directory which includes some examples on features of the FORTRAN90 language.

F90_INTRINSICS is a directory which includes some examples of the use of intrinsic functions defined as part of the FORTRAN90 standard.

G++_INTRINSICS is a C++ program which demonstrates some of the intrinsic functions provided by the G++ compiler.

G77_INTRINSICS is a directory which includes some examples of the use of intrinsic functions included with the GNU G77 compiler.

G95_INTRINSICS is a directory which includes some examples of the use of intrinsic functions included with the GNU G95 FORTRAN compiler.

GCC_INTRINSICS is a C program which tests or demonstrates intrinsic routines provided by the GCC compiler.

GFORTRAN_INTRINSICS is a FORTRAN90 program which demonstrates the use of some of the intrinsic functions included with the GFORTRAN compiler.

MIXED shows some examples of writing a program partly in FORTRAN90 and partly in some other language.

MPI shows how to set up parallel programs in FORTRAN90.

TEST_VALUES is a FORTRAN90 library which stores some sample values of various special functions.

TIMER shows how to compute elapsed CPU time in FORTRAN90.

TIMESTAMP is a library of FORTRAN90 routines which can produce a YMDHMS date for use as a timestamp.

Reference:

1. XL Fortran for AIX,
   Language Reference,
   Version 11, Release 1,
   IBM.
   ../../pdf/ibm/xlf_language_11.1.pdf.

Examples and Tests:

• xlf_intrinsics_prb.f90, a single program that calls many tests; eact test is devoted to a particular XLF intrinsic function.
• xlf_intrinsics_prb.csh, commands that compile and run the test;
• xlf_intrinsics_prb_output.txt, the output file;

List of Routines:

• TEST_ERF checks ERF against ERF_VALUES.
• TEST_ERFC checks ERFC against ERFC_VALUES.
• TEST_ETIME_ tests ETIME_.
• TEST_FDATE_ tests FDATE_.
• TEST_GAMMA checks GAMMA against GAMMA_VALUES.
• TEST_HOSTNM_ tests HOSTNM_.
• TEST_LGAMMA tests LGAMMA..
• TEST_RAND tests RAND.
• TEST_SIZEOF tests SIZEOF.
• TEST_SLEEP_ tests SLEEP_.
• TEST_SYSTEM tests SYSTEM.
• TEST_TIME_ tests TIME_.
• TEST_TIMEF tests TIMEF.
• ERF_VALUES returns some values of the ERF or "error" function.
• ERFC_VALUES returns some values of the ERFC or "complementary error" function.
• GAMMA_VALUES returns some values of the GAMMA function.
• GAMMA_LOG_VALUES returns some values of the log(GAMMA) function.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the FORTRAN90 source codes.