GCC_INTRINSICS
Tests and Demos of GCC Intrinsic Functions.

GCC_INTRINSICS is a C program, using double precision arithmetic, which tests or demonstrates some of the intrinsic functions provided by the GCC compiler.

Related Data and Programs:

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

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

F90_INTRINSICS is a directory which includes some examples of the use of intrinsic functions included with the FORTRAN90 standard language.

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 G77 compiler.

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

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

XLF_INTRINSICS is a directory which includes some examples of the use of intrinsic functions peculiar to the IBM XLF FORTRAN compiler.

Reference:

1. Brian Gough,
   An Introduction to GCC,
   Network Theory Ltd,
   ISBN: 0-9541617-9-3.
2. Arthur Griffith,
   GCC: The Complete Reference,
   McGrawHill,
   ISBN: 0-07-222405-3.
3. Richard Stallman,
   Using GCC: The Gnu Compiler Collection Reference,
   Free Software Foundation,
   ISBN: 1-882114-39-6.

Source Code:

• gcc_intrinsics.c, the source code.
• gcc_intrinsics.csh, commands to compile, link, load and run the source code.
• gcc_intrinsics_output.txt, the output file.

List of Routines:

• MAIN is the main program for GCC_INTRINSICS.
• TEST_ERF tests ERF.
• TEST_ERFC tests ERFC.
• TEST_GAMMA tests GAMMA.
• 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.
• R8_ABS returns the absolute value of an R8.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

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