source: palm/trunk/SOURCE/mod_kinds.f90 @ 4178

Last change on this file since 4178 was 4000, checked in by raasch, 2 years ago

preprocessor switch added for choosing the real precision

  • Property svn:keywords set to Id
File size: 2.6 KB
Line 
1!> @file mod_kinds.f90
2!------------------------------------------------------------------------------!
3! This file is part of the PALM model system.
4!
5! PALM is free software: you can redistribute it and/or modify it under the
6! terms of the GNU General Public License as published by the Free Software
7! Foundation, either version 3 of the License, or (at your option) any later
8! version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2019 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! ------------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: mod_kinds.f90 4000 2019-05-24 07:20:44Z suehring $
27! preprocessor switch added for choosing the real precision
28!
29! 3655 2019-01-07 16:51:22Z knoop
30! Corrected "Former revisions" section
31!
32! 2696 2017-12-14 17:12:51Z kanani
33! Change in file header (GPL part)
34!
35! 2101 2017-01-05 16:42:31Z suehring
36!
37! 2000 2016-08-20 18:09:15Z knoop
38! Forced header and separation lines into 80 columns
39!
40! 1682 2015-10-07 23:56:08Z knoop
41! Code annotations made doxygen readable
42!
43! 1306 2014-03-13 14:30:59Z raasch
44! Initial revision
45!
46! Description:
47! ------------
48!> Standard kind definitions
49!> wp (working precision) and iwp (integer working precision) are the kinds
50!> used by default in all variable declarations.
51!> By default, PALM is using wp = dp (64bit), and iwp = isp (32bit).
52!> If you like to switch to other precision, then please set wp/iwp
53!> appropriately by assigning other kinds below.
54!------------------------------------------------------------------------------!
55 MODULE kinds
56 
57
58    IMPLICIT NONE
59
60!
61!-- Floating point kinds
62    INTEGER, PARAMETER ::  sp = 4           !< single precision (32 bit)
63    INTEGER, PARAMETER ::  dp = 8           !< double precision (64 bit)
64
65!
66!-- Integer kinds
67    INTEGER, PARAMETER ::  isp = SELECTED_INT_KIND(  9 )   !< single precision (32 bit)
68    INTEGER, PARAMETER ::  idp = SELECTED_INT_KIND( 14 )   !< double precision (64 bit)
69
70!
71!-- Set kinds to be used as defaults
72#if defined( __single_precision )
73    INTEGER, PARAMETER ::   wp =  sp          !< default real kind
74#else
75    INTEGER, PARAMETER ::   wp =  dp          !< default real kind
76#endif
77    INTEGER, PARAMETER ::  iwp = isp          !< default integer kind
78
79    SAVE
80
81 END MODULE kinds
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