[1682] | 1 | !> @file exchange_horiz.f90 |
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[1320] | 2 | !------------------------------------------------------------------------------! |
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[2696] | 3 | ! This file is part of the PALM model system. |
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[1036] | 4 | ! |
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[2000] | 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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[1036] | 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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[3655] | 17 | ! Copyright 1997-2019 Leibniz Universitaet Hannover |
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[1320] | 18 | !------------------------------------------------------------------------------! |
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[1036] | 19 | ! |
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[484] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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[1678] | 22 | ! |
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[2119] | 23 | ! |
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[1321] | 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: exchange_horiz.f90 3761 2019-02-25 15:31:42Z Giersch $ |
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[3761] | 27 | ! OpenACC directives re-formatted |
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| 28 | ! |
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| 29 | ! 3657 2019-01-07 20:14:18Z knoop |
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[3634] | 30 | ! OpenACC port for SPEC |
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| 31 | ! |
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| 32 | ! 3241 2018-09-12 15:02:00Z raasch |
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[3241] | 33 | ! unused variables removed |
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| 34 | ! |
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| 35 | ! 2718 2018-01-02 08:49:38Z maronga |
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[2716] | 36 | ! Corrected "Former revisions" section |
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| 37 | ! |
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| 38 | ! 2696 2017-12-14 17:12:51Z kanani |
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| 39 | ! Change in file header (GPL part) |
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[2696] | 40 | ! 3D-Integer exchange on multigrid level (MS) |
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| 41 | ! |
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| 42 | ! 2298 2017-06-29 09:28:18Z raasch |
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[2298] | 43 | ! sendrecv_in_background related parts removed |
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| 44 | ! |
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| 45 | ! 2119 2017-01-17 16:51:50Z raasch |
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[1321] | 46 | ! |
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[2119] | 47 | ! 2118 2017-01-17 16:38:49Z raasch |
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| 48 | ! OpenACC directives and related code removed |
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| 49 | ! |
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[2001] | 50 | ! 2000 2016-08-20 18:09:15Z knoop |
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| 51 | ! Forced header and separation lines into 80 columns |
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| 52 | ! |
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[1805] | 53 | ! 1804 2016-04-05 16:30:18Z maronga |
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| 54 | ! Removed code for parameter file check (__check) |
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| 55 | ! |
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[1683] | 56 | ! 1682 2015-10-07 23:56:08Z knoop |
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| 57 | ! Code annotations made doxygen readable |
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| 58 | ! |
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[1678] | 59 | ! 1677 2015-10-02 13:25:23Z boeske |
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| 60 | ! Added new routine for exchange of three-dimensional integer arrays |
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| 61 | ! |
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[1570] | 62 | ! 1569 2015-03-12 07:54:38Z raasch |
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| 63 | ! bugfix in background communication part |
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| 64 | ! |
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[1349] | 65 | ! 1348 2014-03-27 18:01:03Z raasch |
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[1569] | 66 | ! bugfix: on_device added to ONLY-list |
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[1349] | 67 | ! |
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[1345] | 68 | ! 1344 2014-03-26 17:33:09Z kanani |
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| 69 | ! Added missing parameters to ONLY-attribute |
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| 70 | ! |
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[1321] | 71 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 72 | ! ONLY-attribute added to USE-statements, |
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| 73 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 74 | ! kinds are defined in new module kinds, |
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| 75 | ! revision history before 2012 removed, |
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| 76 | ! comment fields (!:) to be used for variable explanations added to |
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| 77 | ! all variable declaration statements |
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[668] | 78 | ! |
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[1258] | 79 | ! 1257 2013-11-08 15:18:40Z raasch |
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| 80 | ! openacc loop and loop vector clauses removed |
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| 81 | ! |
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[1132] | 82 | ! 1128 2013-04-12 06:19:32Z raasch |
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| 83 | ! modifications for asynchronous transfer, |
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| 84 | ! local variables req, wait_stat are global now, and have been moved to module |
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| 85 | ! pegrid |
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| 86 | ! |
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[1114] | 87 | ! 1113 2013-03-10 02:48:14Z raasch |
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| 88 | ! GPU-porting for single-core (1PE) mode |
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| 89 | ! |
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[1037] | 90 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 91 | ! code put under GPL (PALM 3.9) |
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| 92 | ! |
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[842] | 93 | ! 841 2012-02-28 12:29:49Z maronga |
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| 94 | ! Excluded routine from compilation of namelist_file_check |
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| 95 | ! |
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[1] | 96 | ! Revision 1.1 1997/07/24 11:13:29 raasch |
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| 97 | ! Initial revision |
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| 98 | ! |
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| 99 | ! |
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| 100 | ! Description: |
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| 101 | ! ------------ |
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[1682] | 102 | !> Exchange of lateral boundary values (parallel computers) and cyclic |
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| 103 | !> lateral boundary conditions, respectively. |
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[1] | 104 | !------------------------------------------------------------------------------! |
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[1682] | 105 | SUBROUTINE exchange_horiz( ar, nbgp_local) |
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| 106 | |
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[1] | 107 | |
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[1320] | 108 | USE control_parameters, & |
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[3761] | 109 | ONLY: bc_lr_cyc, bc_ns_cyc, grid_level, mg_switch_to_pe0, synchronous_exchange |
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[1320] | 110 | |
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| 111 | USE cpulog, & |
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| 112 | ONLY: cpu_log, log_point_s |
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| 113 | |
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| 114 | USE indices, & |
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| 115 | ONLY: nxl, nxr, nyn, nys, nzb, nzt |
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| 116 | |
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| 117 | USE kinds |
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| 118 | |
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[1] | 119 | USE pegrid |
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| 120 | |
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| 121 | IMPLICIT NONE |
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| 122 | |
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[841] | 123 | |
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[3761] | 124 | #if defined( _OPENACC ) |
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[3634] | 125 | INTEGER(iwp) :: i !< |
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| 126 | #endif |
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[3761] | 127 | |
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[1682] | 128 | INTEGER(iwp) :: nbgp_local !< |
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[1320] | 129 | |
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| 130 | REAL(wp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, & |
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[1682] | 131 | nxl-nbgp_local:nxr+nbgp_local) :: ar !< |
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[1320] | 132 | |
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[841] | 133 | |
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[1] | 134 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' ) |
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| 135 | |
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[3761] | 136 | #if defined( _OPENACC ) |
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[3657] | 137 | !$ACC UPDATE IF_PRESENT ASYNC(1) & |
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[3634] | 138 | !$ACC HOST(ar(:,:,nxr-nbgp_local+1:nxr)) & |
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| 139 | !$ACC HOST(ar(:,:,nxl:nxl+nbgp_local-1)) |
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[3657] | 140 | |
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| 141 | ! |
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| 142 | !-- Wait for first UPDATE to complete before starting the others. |
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| 143 | !$ACC WAIT(1) ASYNC(2) |
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| 144 | ! ar(:,:,nxl-nbgp_local:nxl-1) is overwritten by first part below |
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| 145 | ! ar(:,:,nxl:nxl+nbgp_local-1) has been transferred above |
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| 146 | DO i = nxl+nbgp_local, nxr-nbgp_local |
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| 147 | !$ACC UPDATE IF_PRESENT ASYNC(2) & |
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[3634] | 148 | !$ACC HOST(ar(:,nyn-nbgp_local+1:nyn,i)) & |
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| 149 | !$ACC HOST(ar(:,nys:nys+nbgp_local-1,i)) |
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| 150 | ENDDO |
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[3657] | 151 | ! ar(:,:,nxr-nbgp_local+1:nxr) has been transferred above |
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| 152 | ! ar(:,:,nxr+1:nxr+nbgp_local) is overwritten by first part below |
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| 153 | |
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| 154 | ! |
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| 155 | !-- Wait for first UPDATE to complete before starting MPI. |
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| 156 | !$ACC WAIT(1) |
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[3634] | 157 | #endif |
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| 158 | |
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[1] | 159 | #if defined( __parallel ) |
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| 160 | |
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| 161 | ! |
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[1128] | 162 | !-- Exchange in x-direction of lateral boundaries |
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[1] | 163 | IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 164 | ! |
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| 165 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 166 | !-- within the PE memory |
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[707] | 167 | IF ( bc_lr_cyc ) THEN |
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[667] | 168 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 169 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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[1] | 170 | ENDIF |
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| 171 | |
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| 172 | ELSE |
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[75] | 173 | |
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[683] | 174 | IF ( synchronous_exchange ) THEN |
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[1] | 175 | ! |
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[683] | 176 | !-- Send left boundary, receive right one (synchronous) |
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| 177 | CALL MPI_SENDRECV( & |
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[707] | 178 | ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), pleft, 0, & |
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| 179 | ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), pright, 0, & |
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| 180 | comm2d, status, ierr ) |
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[1] | 181 | ! |
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[683] | 182 | !-- Send right boundary, receive left one (synchronous) |
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[1320] | 183 | CALL MPI_SENDRECV( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, & |
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| 184 | type_yz(grid_level), pright, 1, & |
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| 185 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 186 | type_yz(grid_level), pleft, 1, & |
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[707] | 187 | comm2d, status, ierr ) |
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[667] | 188 | |
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[683] | 189 | ELSE |
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[667] | 190 | |
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[683] | 191 | ! |
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[2298] | 192 | !-- Asynchroneous exchange |
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[1128] | 193 | IF ( send_receive == 'lr' .OR. send_receive == 'al' ) THEN |
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| 194 | |
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[2298] | 195 | req(1:4) = 0 |
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| 196 | req_count = 0 |
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[683] | 197 | ! |
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[1128] | 198 | !-- Send left boundary, receive right one (asynchronous) |
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| 199 | CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), & |
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| 200 | pleft, req_count, comm2d, req(req_count+1), ierr ) |
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| 201 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), & |
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| 202 | pright, req_count, comm2d, req(req_count+2), ierr ) |
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| 203 | ! |
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| 204 | !-- Send right boundary, receive left one (asynchronous) |
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[1320] | 205 | CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, & |
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| 206 | type_yz(grid_level), pright, req_count+1, comm2d, & |
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[1128] | 207 | req(req_count+3), ierr ) |
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[1320] | 208 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 209 | type_yz(grid_level), pleft, req_count+1, comm2d, & |
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[1128] | 210 | req(req_count+4), ierr ) |
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[667] | 211 | |
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[2298] | 212 | CALL MPI_WAITALL( 4, req, wait_stat, ierr ) |
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[75] | 213 | |
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[1128] | 214 | ENDIF |
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| 215 | |
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[683] | 216 | ENDIF |
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| 217 | |
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[1] | 218 | ENDIF |
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| 219 | |
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[3657] | 220 | !$ACC UPDATE IF_PRESENT ASYNC(1) & |
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| 221 | !$ACC DEVICE(ar(:,:,nxl-nbgp_local:nxl-1)) & |
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| 222 | !$ACC DEVICE(ar(:,:,nxr+1:nxr+nbgp_local)) |
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[1] | 223 | |
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[3657] | 224 | ! |
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| 225 | !-- Wait for UPDATES above to complete before starting MPI. |
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| 226 | !$ACC WAIT(2) |
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| 227 | |
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[1] | 228 | IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 229 | ! |
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| 230 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 231 | !-- within the PE memory |
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[707] | 232 | IF ( bc_ns_cyc ) THEN |
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[667] | 233 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 234 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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[1] | 235 | ENDIF |
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| 236 | |
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| 237 | ELSE |
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| 238 | |
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[683] | 239 | IF ( synchronous_exchange ) THEN |
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[1] | 240 | ! |
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[683] | 241 | !-- Send front boundary, receive rear one (synchronous) |
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| 242 | CALL MPI_SENDRECV( & |
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[707] | 243 | ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), psouth, 0, & |
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| 244 | ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), pnorth, 0, & |
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| 245 | comm2d, status, ierr ) |
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[683] | 246 | ! |
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| 247 | !-- Send rear boundary, receive front one (synchronous) |
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[1320] | 248 | CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, & |
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| 249 | type_xz(grid_level), pnorth, 1, & |
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| 250 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 251 | type_xz(grid_level), psouth, 1, & |
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[707] | 252 | comm2d, status, ierr ) |
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[667] | 253 | |
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[683] | 254 | ELSE |
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| 255 | |
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[1] | 256 | ! |
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[2298] | 257 | !-- Asynchroneous exchange |
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[1569] | 258 | IF ( send_receive == 'ns' .OR. send_receive == 'al' ) THEN |
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[1128] | 259 | |
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[2298] | 260 | req(1:4) = 0 |
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| 261 | req_count = 0 |
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[1128] | 262 | |
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[683] | 263 | ! |
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[1128] | 264 | !-- Send front boundary, receive rear one (asynchronous) |
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| 265 | CALL MPI_ISEND( ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), & |
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| 266 | psouth, req_count, comm2d, req(req_count+1), ierr ) |
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| 267 | CALL MPI_IRECV( ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), & |
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| 268 | pnorth, req_count, comm2d, req(req_count+2), ierr ) |
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| 269 | ! |
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| 270 | !-- Send rear boundary, receive front one (asynchronous) |
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[1320] | 271 | CALL MPI_ISEND( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, & |
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| 272 | type_xz(grid_level), pnorth, req_count+1, comm2d, & |
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[1128] | 273 | req(req_count+3), ierr ) |
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[1320] | 274 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 275 | type_xz(grid_level), psouth, req_count+1, comm2d, & |
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[1128] | 276 | req(req_count+4), ierr ) |
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[75] | 277 | |
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[2298] | 278 | CALL MPI_WAITALL( 4, req, wait_stat, ierr ) |
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[683] | 279 | |
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[1128] | 280 | ENDIF |
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| 281 | |
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[683] | 282 | ENDIF |
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| 283 | |
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[1] | 284 | ENDIF |
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| 285 | |
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| 286 | #else |
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| 287 | |
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| 288 | ! |
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[1113] | 289 | !-- Lateral boundary conditions in the non-parallel case. |
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| 290 | !-- Case dependent, because in GPU mode still not all arrays are on device. This |
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| 291 | !-- workaround has to be removed later. Also, since PGI compiler 12.5 has problems |
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| 292 | !-- with array syntax, explicit loops are used. |
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[3241] | 293 | IF ( bc_lr_cyc ) THEN |
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[2118] | 294 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 295 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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[1] | 296 | ENDIF |
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| 297 | |
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[3657] | 298 | !$ACC UPDATE IF_PRESENT ASYNC(1) & |
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| 299 | !$ACC DEVICE(ar(:,:,nxl-nbgp_local:nxl-1)) & |
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| 300 | !$ACC DEVICE(ar(:,:,nxr+1:nxr+nbgp_local)) |
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| 301 | |
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| 302 | ! |
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| 303 | !-- Wait for UPDATES above to complete before starting MPI. |
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| 304 | !$ACC WAIT(2) |
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| 305 | |
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[3241] | 306 | IF ( bc_ns_cyc ) THEN |
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[2118] | 307 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 308 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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[1] | 309 | ENDIF |
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| 310 | |
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| 311 | #endif |
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[3634] | 312 | |
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[3761] | 313 | #if defined( _OPENACC ) |
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[3634] | 314 | DO i = nxl-nbgp_local, nxr+nbgp_local |
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[3657] | 315 | !$ACC UPDATE IF_PRESENT ASYNC(2) & |
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[3634] | 316 | !$ACC DEVICE(ar(:,nys-nbgp_local:nys-1,i)) & |
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| 317 | !$ACC DEVICE(ar(:,nyn+1:nyn+nbgp_local,i)) |
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| 318 | ENDDO |
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[3657] | 319 | |
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| 320 | ! |
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| 321 | !-- Wait for all UPDATEs to finish. |
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| 322 | !$ACC WAIT |
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[3634] | 323 | #endif |
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| 324 | |
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[1] | 325 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' ) |
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| 326 | |
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| 327 | END SUBROUTINE exchange_horiz |
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[1677] | 328 | |
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| 329 | |
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[1682] | 330 | !------------------------------------------------------------------------------! |
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| 331 | ! Description: |
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| 332 | ! ------------ |
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| 333 | !> @todo Missing subroutine description. |
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| 334 | !------------------------------------------------------------------------------! |
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[2696] | 335 | SUBROUTINE exchange_horiz_int( ar, nys_l, nyn_l, nxl_l, nxr_l, nzt_l, nbgp_local) |
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[1677] | 336 | |
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| 337 | USE control_parameters, & |
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[3241] | 338 | ONLY: bc_lr_cyc, bc_ns_cyc, grid_level |
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[1677] | 339 | |
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| 340 | USE indices, & |
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[3241] | 341 | ONLY: nzb |
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[1677] | 342 | |
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| 343 | USE kinds |
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| 344 | |
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| 345 | USE pegrid |
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| 346 | |
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| 347 | IMPLICIT NONE |
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| 348 | |
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[2696] | 349 | INTEGER(iwp) :: nxl_l !< local index bound at current grid level, left side |
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| 350 | INTEGER(iwp) :: nxr_l !< local index bound at current grid level, right side |
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| 351 | INTEGER(iwp) :: nyn_l !< local index bound at current grid level, north side |
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| 352 | INTEGER(iwp) :: nys_l !< local index bound at current grid level, south side |
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| 353 | INTEGER(iwp) :: nzt_l !< local index bound at current grid level, top |
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[1682] | 354 | INTEGER(iwp) :: nbgp_local !< number of ghost points |
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[1677] | 355 | |
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[2696] | 356 | INTEGER(iwp), DIMENSION(nzb:nzt_l+1,nys_l-nbgp_local:nyn_l+nbgp_local, & |
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| 357 | nxl_l-nbgp_local:nxr_l+nbgp_local) :: ar !< treated array |
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[1677] | 358 | |
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| 359 | |
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| 360 | #if defined( __parallel ) |
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| 361 | IF ( pdims(1) == 1 ) THEN |
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| 362 | ! |
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| 363 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 364 | !-- within the PE memory |
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| 365 | IF ( bc_lr_cyc ) THEN |
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[2696] | 366 | ar(:,:,nxl_l-nbgp_local:nxl_l-1) = ar(:,:,nxr_l-nbgp_local+1:nxr_l) |
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| 367 | ar(:,:,nxr_l+1:nxr_l+nbgp_local) = ar(:,:,nxl_l:nxl_l+nbgp_local-1) |
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[1677] | 368 | ENDIF |
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| 369 | ELSE |
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| 370 | ! |
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| 371 | !-- Send left boundary, receive right one (synchronous) |
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[2696] | 372 | CALL MPI_SENDRECV( & |
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| 373 | ar(nzb,nys_l-nbgp_local,nxl_l), 1, type_yz_int(grid_level), pleft, 0,& |
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| 374 | ar(nzb,nys_l-nbgp_local,nxr_l+1), 1, type_yz_int(grid_level), pright, 0,& |
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[1677] | 375 | comm2d, status, ierr ) |
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| 376 | ! |
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| 377 | !-- Send right boundary, receive left one (synchronous) |
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[2696] | 378 | CALL MPI_SENDRECV( & |
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| 379 | ar(nzb,nys_l-nbgp_local,nxr_l+1-nbgp_local), 1, type_yz_int(grid_level),& |
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| 380 | pright, 1, & |
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| 381 | ar(nzb,nys_l-nbgp_local,nxl_l-nbgp_local), 1, type_yz_int(grid_level),& |
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| 382 | pleft, 1, & |
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[1677] | 383 | comm2d, status, ierr ) |
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| 384 | ENDIF |
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| 385 | |
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| 386 | |
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| 387 | IF ( pdims(2) == 1 ) THEN |
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| 388 | ! |
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| 389 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 390 | !-- within the PE memory |
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| 391 | IF ( bc_ns_cyc ) THEN |
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[2696] | 392 | ar(:,nys_l-nbgp_local:nys_l-1,:) = ar(:,nyn_l-nbgp_local+1:nyn_l,:) |
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| 393 | ar(:,nyn_l+1:nyn_l+nbgp_local,:) = ar(:,nys_l:nys_l+nbgp_local-1,:) |
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[1677] | 394 | ENDIF |
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| 395 | |
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| 396 | ELSE |
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| 397 | |
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| 398 | ! |
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| 399 | !-- Send front boundary, receive rear one (synchronous) |
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[2696] | 400 | CALL MPI_SENDRECV( & |
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| 401 | ar(nzb,nys_l,nxl_l-nbgp_local), 1, type_xz_int(grid_level), psouth, 0,& |
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| 402 | ar(nzb,nyn_l+1,nxl_l-nbgp_local), 1, type_xz_int(grid_level), pnorth, 0,& |
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[1677] | 403 | comm2d, status, ierr ) |
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| 404 | ! |
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| 405 | !-- Send rear boundary, receive front one (synchronous) |
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[2696] | 406 | CALL MPI_SENDRECV( ar(nzb,nyn_l-nbgp_local+1,nxl_l-nbgp_local), 1, & |
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| 407 | type_xz_int(grid_level), pnorth, 1, & |
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| 408 | ar(nzb,nys_l-nbgp_local,nxl_l-nbgp_local), 1, & |
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| 409 | type_xz_int(grid_level), psouth, 1, & |
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[1677] | 410 | comm2d, status, ierr ) |
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| 411 | |
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| 412 | ENDIF |
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| 413 | |
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| 414 | #else |
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| 415 | |
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[3241] | 416 | IF ( bc_lr_cyc ) THEN |
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[2696] | 417 | ar(:,:,nxl_l-nbgp_local:nxl_l-1) = ar(:,:,nxr_l-nbgp_local+1:nxr_l) |
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| 418 | ar(:,:,nxr_l+1:nxr_l+nbgp_local) = ar(:,:,nxl_l:nxl_l+nbgp_local-1) |
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[1677] | 419 | ENDIF |
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| 420 | |
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[3241] | 421 | IF ( bc_ns_cyc ) THEN |
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[2696] | 422 | ar(:,nys_l-nbgp_local:nys_l-1,:) = ar(:,nyn_l-nbgp_local+1:nyn_l,:) |
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| 423 | ar(:,nyn_l+1:nyn_l+nbgp_local,:) = ar(:,nys_l:nys_l+nbgp_local-1,:) |
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[1677] | 424 | ENDIF |
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| 425 | |
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| 426 | #endif |
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| 427 | |
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| 428 | |
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[1933] | 429 | END SUBROUTINE exchange_horiz_int |
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