source: palm/trunk/SOURCE/swap_timelevel.f90 @ 1116

Last change on this file since 1116 was 1116, checked in by hoffmann, 8 years ago

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1 SUBROUTINE swap_timelevel
2
3!--------------------------------------------------------------------------------!
4! This file is part of PALM.
5!
6! PALM is free software: you can redistribute it and/or modify it under the terms
7! of the GNU General Public License as published by the Free Software Foundation,
8! either version 3 of the License, or (at your option) any later 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 1997-2012  Leibniz University Hannover
18!--------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: swap_timelevel.f90 1116 2013-03-26 18:49:55Z hoffmann $
27!
28! 1115 2013-03-26 18:16:16Z hoffmann
29! calculation of qr and nr is restricted to precipitation
30!
31! 1111 2013-03-08 23:54:10Z raasch
32! openACC directives added
33!
34! 1053 2012-11-13 17:11:03Z hoffmann
35! swap of timelevels for nr, qr added
36!
37! 1036 2012-10-22 13:43:42Z raasch
38! code put under GPL (PALM 3.9)
39!
40! 1032 2012-10-21 13:03:21Z letzel
41! save memory by not allocating pt_2 in case of neutral = .T.
42!
43! 1010 2012-09-20 07:59:54Z raasch
44! cpp switch __nopointer added for pointer free version
45!
46! 1001 2012-09-13 14:08:46Z raasch
47! all actions concerning leapfrog scheme removed
48!
49! 102 2007-07-27 09:09:17Z raasch
50! swaping of uswst, vswst included
51!
52! 95 2007-06-02 16:48:38Z raasch
53! Swaping of salinity
54!
55! 75 2007-03-22 09:54:05Z raasch
56! moisture renamed humidity
57!
58! 19 2007-02-23 04:53:48Z raasch
59! Swaping of top fluxes
60!
61! RCS Log replace by Id keyword, revision history cleaned up
62!
63! Revision 1.8  2004/01/28 15:28:18  raasch
64! Swaping for Runge-Kutta schemes implemented
65!
66! Revision 1.1  2000/01/10  10:08:58  10:08:58  raasch (Siegfried Raasch)
67! Initial revision
68!
69!
70! Description:
71! ------------
72! Swap of timelevels of variables after each timestep
73!------------------------------------------------------------------------------!
74
75    USE arrays_3d
76    USE cpulog
77    USE interfaces
78    USE control_parameters
79
80    IMPLICIT NONE
81
82!
83!-- Incrementing timestep counter
84    timestep_count = timestep_count + 1
85
86!
87!-- Swap of variables
88#if defined( __nopointer )
89    CALL cpu_log( log_point(28), 'swap_timelevel (nop)', 'start' )
90
91    !$acc kernels present( pt, pt_p, u, u_p, v, v_p, w, w_p )
92    u  = u_p
93    v  = v_p
94    w  = w_p
95    pt = pt_p
96    !$acc end kernels
97    IF ( .NOT. constant_diffusion )  THEN
98       !$acc kernels present( e, e_p )
99       e = e_p
100       !$acc end kernels
101    ENDIF
102    IF ( ocean )  THEN
103       sa = sa_p
104    ENDIF
105    IF ( humidity  .OR.  passive_scalar )  THEN
106       q = q_p             
107       IF ( cloud_physics  .AND.  icloud_scheme == 0 )  THEN
108          qr = qr_p
109          nr = nr_p
110       ENDIF
111    ENDIF
112
113    CALL cpu_log( log_point(28), 'swap_timelevel (nop)', 'stop' )
114#else
115    CALL cpu_log( log_point(28), 'swap_timelevel', 'start' )
116
117    SELECT CASE ( MOD( timestep_count, 2 ) )
118
119       CASE ( 0 )
120
121          u  => u_1;   u_p  => u_2
122          v  => v_1;   v_p  => v_2
123          w  => w_1;   w_p  => w_2
124          IF ( .NOT. neutral )  THEN
125             pt => pt_1;  pt_p => pt_2
126          ENDIF
127          IF ( .NOT. constant_diffusion )  THEN
128             e => e_1;    e_p => e_2
129          ENDIF
130          IF ( ocean )  THEN
131             sa => sa_1;  sa_p => sa_2
132          ENDIF
133          IF ( humidity  .OR.  passive_scalar )  THEN
134             q => q_1;    q_p => q_2
135             IF ( cloud_physics  .AND.  icloud_scheme == 0  .AND.  &
136                  precipitation )  THEN
137                qr => qr_1;    qr_p => qr_2
138                nr => nr_1;    nr_p => nr_2
139             ENDIF
140          ENDIF
141
142
143       CASE ( 1 )
144
145          u  => u_2;   u_p  => u_1
146          v  => v_2;   v_p  => v_1
147          w  => w_2;   w_p  => w_1
148          IF ( .NOT. neutral )  THEN
149             pt => pt_2;  pt_p => pt_1
150          ENDIF
151          IF ( .NOT. constant_diffusion )  THEN
152             e => e_2;    e_p => e_1
153          ENDIF
154          IF ( ocean )  THEN
155             sa => sa_2;  sa_p => sa_1
156          ENDIF
157          IF ( humidity  .OR.  passive_scalar )  THEN
158             q => q_2;    q_p => q_1
159             IF ( cloud_physics  .AND.  icloud_scheme == 0  .AND.  &
160                  precipitation)  THEN
161                qr => qr_2;    qr_p => qr_1
162                nr => nr_2;    nr_p => nr_1
163             ENDIF
164          ENDIF
165
166
167    END SELECT
168
169    CALL cpu_log( log_point(28), 'swap_timelevel', 'stop' )
170#endif
171
172 END SUBROUTINE swap_timelevel
173
174
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