73 lines
2.7 KiB
Fortran
73 lines
2.7 KiB
Fortran
! Copyright 2011 Max-Planck-Institut für Eisenforschung GmbH
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!
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! This file is part of DAMASK,
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! the Düsseldorf Advanced MAterial Simulation Kit.
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!
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! DAMASK is free software: you can redistribute it and/or modify
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! it under the terms of the GNU General Public License as published by
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! the Free Software Foundation, either version 3 of the License, or
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! (at your option) any later version.
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!
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! DAMASK is distributed in the hope that it will be useful,
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! but WITHOUT ANY WARRANTY; without even the implied warranty of
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! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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! GNU General Public License for more details.
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!
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! You should have received a copy of the GNU General Public License
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! along with DAMASK. If not, see <http://www.gnu.org/licenses/>.
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!
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!##############################################################
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!* $Id$
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!##############################################################
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MODULE prec
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!##############################################################
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implicit none
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! *** Precision of real and integer variables ***
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integer, parameter, public :: pReal = selected_real_kind(6,37) ! 6 significant digits, up to 1e+-37
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integer, parameter, public :: pInt = selected_int_kind(9) ! up to +- 1e9
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integer, parameter, public :: pLongInt = 4 ! should be 64bit
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real(pReal), parameter, public :: tol_math_check = 1.0e-5_pReal
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real(pReal), parameter, public :: tol_gravityNodePos = 1.0e-36_pReal
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! NaN is precision dependent
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! from http://www.hpc.unimelb.edu.au/doc/f90lrm/dfum_035.html
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! copy can be found in documentation/Code/Fortran
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#ifdef __INTEL_COMPILER
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#if __INTEL_COMPILER<1200
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real(pReal), parameter, public :: DAMASK_NaN = Z'Z'7F800001', pReal'
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#else
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real(pReal), parameter, public :: DAMASK_NaN = real(Z'7F800001', pReal)
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#endif
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#else
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real(pReal), parameter, public :: DAMASK_NaN = real(Z'7F800001', pReal)
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#endif
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type :: p_vec
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real(pReal), dimension(:), pointer :: p
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end type p_vec
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CONTAINS
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subroutine prec_init
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use, intrinsic :: iso_fortran_env ! to get compiler_version and compiler_options (at least for gfortran 4.6 at the moment)
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implicit none
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!$OMP CRITICAL (write2out)
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write(6,*)
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write(6,*) '<<<+- prec_single init -+>>>'
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write(6,*) '$Id$'
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#include "compilation_info.f90"
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write(6,'(a,i3)') ' Bytes for pReal: ',pReal
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write(6,'(a,i3)') ' Bytes for pInt: ',pInt
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write(6,'(a,i3)') ' Bytes for pLongInt: ',pLongInt
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write(6,'(a,e10.3)') ' NaN: ',DAMASK_NAN
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write(6,'(a,l3)') ' NaN /= NaN: ',DAMASK_NaN/=DAMASK_NaN
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if (DAMASK_NaN == DAMASK_NaN) call quit(9000)
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write(6,*)
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!$OMP END CRITICAL (write2out)
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end subroutine
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END MODULE prec
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