3.8.6 Linux: PGI Compiler

So far, under Linux the compiler of the Portland Group has been used mostly to compile CO5BOLD. It is called with pgf90.

Important switches are:

• -byteswapio: With this flag set, binary files in big_endian format (the standard for UIO files) are automatically transformed to little_endian and vice versa.

• -fast: General optimization flag to choose (close to) optimum optimization for local machine.

• -Mvect=sse: Optimization: Allow Pentium III vector commands.

• -Mcache_align: Optimization: Align some data object on cache-line boundaries.

• -fastsse: From compiler version 4.0 on, this option can be used instead of the three previous ones. It contains and supersedes them.

• -Minline=...: Optimization: Routines that should be inlined:
  file rhd_hyd_module.F90: rhd_hyd_avg, rhd_hyd_upwind, rhd_hyd_pred0, rhd_hyd_predm, rhd_hyd_predp, rhd_hyd_alpha, rhd_hyd_constanteq, rhd_hyd_minmodeq, rhd_hyd_minmod, rhd_hyd_vanleereq, rhd_hyd_vanleer, rhd_hyd_superbeeeq, rhd_hyd_superbee, rhd_hyd_ppeq, rhd_hyd_pp, rhd_hyd_hdflux,
  file rhd_lhdrad_module.F90: rhd_rad3d_raylhd, rhd_rad3d_solve, rhd_rad3d_solveeq,
  file rhd_shortrad_module.F90: rhd_shortrad_operator, rhd_shortrad_dtauop.

• -DMSrad_raytas1=1: Optimization: choose non-default version of SUBROUTINE raytas in file MSrad3D.F90.

• -Drhd_hyd_roe1d_l01=0: Optimization: choose standard set of routines for Roe solver. See Sect. 3.7.

• -Drhd_shortrad_operator_l02=1: Optimization: use the ``manually inlined version'' of the short characteristics operator.

• -Drhd_shortrad_dtauop_l02=1: Optimization: use the ``manually inlined version'' of the optical coupling operator.