104 lines
5.1 KiB
Fortran
104 lines
5.1 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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!> @author Franz Roters, Max-Planck-Institut für Eisenforschung GmbH
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!> @author Philip Eisenlohr, Max-Planck-Institut für Eisenforschung GmbH
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!> @author Christoph Kords, Max-Planck-Institut für Eisenforschung GmbH
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!> @author Martin Diehl, Max-Planck-Institut für Eisenforschung GmbH
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!> @brief setting precision for real and int type depending on makros "FLOAT" and "INT"
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!--------------------------------------------------------------------------------------------------
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#ifdef __INTEL_COMPILER
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#if __INTEL_COMPILER<1200
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#define LEGACY_COMPILER
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#endif
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#endif
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!--------------------------------------------------------------------------------------------------
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module prec
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implicit none
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private
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#if (FLOAT==4)
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integer, parameter, public :: pReal = 4 !< floating point single precition (was selected_real_kind(6,37), number with 6 significant digits, up to 1e+-37)
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#ifdef LEGACY_COMPILER
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real(pReal), parameter, public :: DAMASK_NaN = Z'7F800001' !< quiet NaN for single precision (from http://www.hpc.unimelb.edu.au/doc/f90lrm/dfum_035.html, copy can be found in documentation/Code/Fortran)
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#else
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real(pReal), parameter, public :: DAMASK_NaN = real(Z'7F800001', pReal) !< quiet NaN for single precision (from http://www.hpc.unimelb.edu.au/doc/f90lrm/dfum_035.html, copy can be found in documentation/Code/Fortran)
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#endif
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#elif (FLOAT==8)
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integer, parameter, public :: pReal = 8 !< floating point double precision (was selected_real_kind(15,300), number with 15 significant digits, up to 1e+-300)
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#ifdef LEGACY_COMPILER
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real(pReal), parameter, public :: DAMASK_NaN = Z'7FF8000000000000' !< quiet NaN for double precision (from http://www.hpc.unimelb.edu.au/doc/f90lrm/dfum_035.html, copy can be found in documentation/Code/Fortran)
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#else
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real(pReal), parameter, public :: DAMASK_NaN = real(Z'7FF8000000000000', pReal) !< quiet NaN for double precision (from http://www.hpc.unimelb.edu.au/doc/f90lrm/dfum_035.html, copy can be found in documentation/Code/Fortran)
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#endif
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#endif
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#if (INT==4)
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integer, parameter, public :: pInt = 4 !< integer representation 32 bit (was selected_int_kind(9), number with at least up to +- 1e9)
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#elif (INT==8)
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integer, parameter, public :: pInt = 8 !< integer representation 64 bit (was selected_int_kind(12), number with at least up to +- 1e12)
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#endif
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integer, parameter, public :: pLongInt = 8 !< integer representation 64 bit (was selected_int_kind(12), number with at least up to +- 1e12)
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real(pReal), parameter, public :: tol_math_check = 1.0e-8_pReal
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real(pReal), parameter, public :: tol_gravityNodePos = 1.0e-100_pReal
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type, public :: p_vec
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real(pReal), dimension(:), pointer :: p
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end type p_vec
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public :: prec_init
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contains
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!--------------------------------------------------------------------------------------------------
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!> @brief reporting precision and checking if DAMASK_NaN is set correctly
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!--------------------------------------------------------------------------------------------------
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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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!$OMP CRITICAL (write2out)
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#ifndef LEGACY_COMPILER
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open (6, encoding='UTF-8')
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#endif
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write(6,*)
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write(6,*) '<<<+- prec init -+>>>'
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write(6,*) '$Id$'
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#include "compilation_info.f90"
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write(6,'(a,i3)') ' Bytes for pReal: ',pReal
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write(6,'(a,i3)') ' Bytes for pInt: ',pInt
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write(6,'(a,i3)') ' Bytes for pLongInt: ',pLongInt
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write(6,'(a,e10.3)') ' NaN: ', DAMASK_NaN
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write(6,'(a,l3)') ' NaN /= NaN: ',DAMASK_NaN/=DAMASK_NaN
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write(6,*)
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if (DAMASK_NaN == DAMASK_NaN) call quit(9000)
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!$OMP END CRITICAL (write2out)
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end subroutine prec_init
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end module prec
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