Example programs

This section presents several tutorial example programs that illustrate how to use the various features of the mesh-spectral archetype. The following observations apply to most of the examples:

• The utility program header.exe, described in § 4 , is used to generate INCLUDE files containing PARAMETER declarations, and these declarations are used to specify sizes of grids, process grids, and local sections.

• As described in § 2.3 , local sections are frequently declared as 1-dimensional arrays and then passed to subroutines as adjustable array arguments with their actual dimensions.

• ``Hello, world''
  • Program specification.
  • Program code (file hello.FM)
• ``Hello, world'' (variant)
  • Program specification.
  • Program code (file hello_files.FM)
• 2-dimensional FFT
  • Program specification.
  • Program code (file fft.FM)
  • Generating declarations and wrapper (file fft.header_in)
  • Generated declarations (file fft_header.h)
  • Generated wrapper program (file fft_wrap.h)
• Poisson solver
  • Program specification.
  • Program code (file poisson.FM)
  • Generating declarations and wrapper (file poisson.header_in)
  • Generated declarations (file poisson_header.h)
  • Generated wrapper program (file poisson_wrap.h)
• Poisson solver (variant)
  • Program specification.
  • Program code (file poisson_fixed.FM)
  • Generating declarations and wrapper (file poisson_fixed.header_in)
  • Generated declarations (file poisson_fixed_header.h)
  • Generated wrapper program (file poisson_fixed_wrap.h)
• Multigrid prototype
  • Program specification.
  • Program code (file multigrid.FM)
  • Generating declarations and wrapper (file multigrid.header_in)
  • Generated declarations (file multigrid_header.h)
  • Generated wrapper program (file multigrid_wrap.h)
• Recursive doubling example
  • Program specification.
  • Program code (file doubling.FM)