mirror of https://gitlab.com/QEF/q-e.git
65 lines
2.8 KiB
Fortran
65 lines
2.8 KiB
Fortran
!
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! Copyright (C) 2002-2004 quantum-ESPRESSO group
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! This file is distributed under the terms of the
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! GNU General Public License. See the file `License'
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! in the root directory of the present distribution,
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! or http://www.gnu.org/copyleft/gpl.txt .
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!
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!------------------------------------------------------------------------------!
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MODULE kinds
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!------------------------------------------------------------------------------!
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IMPLICIT NONE
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SAVE
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! ... kind definitions
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INTEGER, PARAMETER :: DP = selected_real_kind(14,200)
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INTEGER, PARAMETER :: sgl = selected_real_kind(6,30)
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INTEGER, PARAMETER :: i4b = selected_int_kind(9)
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PRIVATE
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PUBLIC :: i4b, sgl, DP, print_kind_info
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!
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!------------------------------------------------------------------------------!
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!
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CONTAINS
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!
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!------------------------------------------------------------------------------!
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!
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!! Print information about the used data types.
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!
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SUBROUTINE print_kind_info (stdout)
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!
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!------------------------------------------------------------------------------!
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!
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IMPLICIT NONE
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INTEGER, INTENT(IN) :: stdout
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!
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WRITE( stdout,'(/,T2,A)') 'DATA TYPE INFORMATION:'
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!
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WRITE( stdout,'(/,T2,A,T78,A,2(/,T2,A,T75,I6),3(/,T2,A,T67,E14.8))') &
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'REAL: Data type name:', 'DP', ' Kind value:', kind(0.0_DP), &
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' Precision:', precision(0.0_DP), &
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' Smallest nonnegligible quantity relative to 1:', &
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epsilon(0.0_DP), ' Smallest positive number:', tiny(0.0_DP), &
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' Largest representable number:', huge(0.0_DP)
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WRITE( stdout,'(/,T2,A,T78,A,2(/,T2,A,T75,I6),3(/,T2,A,T67,E14.8))') &
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' Data type name:', 'sgl', ' Kind value:', kind(0.0_sgl), &
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' Precision:', precision(0.0_sgl), &
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' Smallest nonnegligible quantity relative to 1:', &
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epsilon(0.0_sgl), ' Smallest positive number:', tiny(0.0_sgl), &
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' Largest representable number:', huge(0.0_sgl)
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WRITE( stdout,'(/,T2,A,T72,A,4(/,T2,A,T61,I20))') &
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'INTEGER: Data type name:', '(default)', ' Kind value:', &
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kind(0), ' Bit size:', bit_size(0), &
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' Largest representable number:', huge(0)
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WRITE( stdout,'(/,T2,A,T72,A,/,T2,A,T75,I6,/)') 'LOGICAL: Data type name:', &
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'(default)', ' Kind value:', kind(.TRUE.)
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WRITE( stdout,'(/,T2,A,T72,A,/,T2,A,T75,I6,/)') &
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'CHARACTER: Data type name:', '(default)', ' Kind value:', &
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kind('C')
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!
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END SUBROUTINE print_kind_info
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!
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!------------------------------------------------------------------------------!
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END MODULE kinds
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!------------------------------------------------------------------------------!
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