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lib_mpp.F90 in branches/UKMO/dev_r5107_hadgem3_mct/NEMOGCM/NEMO/OPA_SRC/LBC – NEMO

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source: branches/UKMO/dev_r5107_hadgem3_mct/NEMOGCM/NEMO/OPA_SRC/LBC/lib_mpp.F90 @ 5679

Last change on this file since 5679 was 5679, checked in by dancopsey, 9 years ago
Merged in extra clean shutdown stuff so that it stops with an error when NEMO crashes rather than carrying on.
File size: 164.7 KB

Line
1	MODULE lib_mpp
2	!!======================================================================
3	!! * MODULE lib_mpp *
4	!! Ocean numerics: massively parallel processing library
5	!!=====================================================================
6	!! History : OPA ! 1994 (M. Guyon, J. Escobar, M. Imbard) Original code
7	!! 7.0 ! 1997 (A.M. Treguier) SHMEM additions
8	!! 8.0 ! 1998 (M. Imbard, J. Escobar, L. Colombet ) SHMEM and MPI
9	!! ! 1998 (J.M. Molines) Open boundary conditions
10	!! NEMO 1.0 ! 2003 (J.-M. Molines, G. Madec) F90, free form
11	!! ! 2003 (J.M. Molines) add mpp_ini_north(_3d,_2d)
12	!! - ! 2004 (R. Bourdalle Badie) isend option in mpi
13	!! ! 2004 (J.M. Molines) minloc, maxloc
14	!! - ! 2005 (G. Madec, S. Masson) npolj=5,6 F-point & ice cases
15	!! - ! 2005 (R. Redler) Replacement of MPI_COMM_WORLD except for MPI_Abort
16	!! - ! 2005 (R. Benshila, G. Madec) add extra halo case
17	!! - ! 2008 (R. Benshila) add mpp_ini_ice
18	!! 3.2 ! 2009 (R. Benshila) SHMEM suppression, north fold in lbc_nfd
19	!! 3.2 ! 2009 (O. Marti) add mpp_ini_znl
20	!! 4.0 ! 2011 (G. Madec) move ctl_ routines from in_out_manager
21	!! 3.5 ! 2012 (S.Mocavero, I. Epicoco) Add 'mpp_lnk_bdy_3d', 'mpp_lnk_obc_3d',
22	!! 'mpp_lnk_bdy_2d' and 'mpp_lnk_obc_2d' routines and update
23	!! the mppobc routine to optimize the BDY and OBC communications
24	!! 3.5 ! 2013 ( C. Ethe, G. Madec ) message passing arrays as local variables
25	!! 3.5 ! 2013 (S.Mocavero, I.Epicoco - CMCC) north fold optimizations
26	!!----------------------------------------------------------------------
27
28	!!----------------------------------------------------------------------
29	!! ctl_stop : update momentum and tracer Kz from a tke scheme
30	!! ctl_warn : initialization, namelist read, and parameters control
31	!! ctl_opn : Open file and check if required file is available.
32	!! ctl_nam : Prints informations when an error occurs while reading a namelist
33	!! get_unit : give the index of an unused logical unit
34	!!----------------------------------------------------------------------
35	#if defined key_mpp_mpi
36	!!----------------------------------------------------------------------
37	!! 'key_mpp_mpi' MPI massively parallel processing library
38	!!----------------------------------------------------------------------
39	!! lib_mpp_alloc : allocate mpp arrays
40	!! mynode : indentify the processor unit
41	!! mpp_lnk : interface (defined in lbclnk) for message passing of 2d or 3d arrays (mpp_lnk_2d, mpp_lnk_3d)
42	!! mpp_lnk_3d_gather : Message passing manadgement for two 3D arrays
43	!! mpp_lnk_e : interface (defined in lbclnk) for message passing of 2d array with extra halo (mpp_lnk_2d_e)
44	!! mpp_lnk_icb : interface for message passing of 2d arrays with extra halo for icebergs (mpp_lnk_2d_icb)
45	!! mpprecv :
46	!! mppsend : SUBROUTINE mpp_ini_znl
47	!! mppscatter :
48	!! mppgather :
49	!! mpp_min : generic interface for mppmin_int , mppmin_a_int , mppmin_real, mppmin_a_real
50	!! mpp_max : generic interface for mppmax_int , mppmax_a_int , mppmax_real, mppmax_a_real
51	!! mpp_sum : generic interface for mppsum_int , mppsum_a_int , mppsum_real, mppsum_a_real
52	!! mpp_minloc :
53	!! mpp_maxloc :
54	!! mppsync :
55	!! mppstop :
56	!! mpp_ini_north : initialisation of north fold
57	!! mpp_lbc_north : north fold processors gathering
58	!! mpp_lbc_north_e : variant of mpp_lbc_north for extra outer halo
59	!! mpp_lbc_north_icb : variant of mpp_lbc_north for extra outer halo with icebergs
60	!!----------------------------------------------------------------------
61	USE dom_oce ! ocean space and time domain
62	USE lbcnfd ! north fold treatment
63	USE in_out_manager ! I/O manager
64	USE mod_oasis ! coupling routines
65
66	IMPLICIT NONE
67	PRIVATE
68
69	PUBLIC ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam
70	PUBLIC mynode, mppstop, mppsync, mpp_comm_free
71	PUBLIC mpp_ini_north, mpp_lbc_north, mpp_lbc_north_e
72	PUBLIC mpp_min, mpp_max, mpp_sum, mpp_minloc, mpp_maxloc
73	PUBLIC mpp_lnk_3d, mpp_lnk_3d_gather, mpp_lnk_2d, mpp_lnk_2d_e
74	PUBLIC mpp_lnk_2d_9
75	PUBLIC mppscatter, mppgather
76	PUBLIC mpp_ini_ice, mpp_ini_znl
77	PUBLIC mppsize
78	PUBLIC mppsend, mpprecv ! needed by TAM and ICB routines
79	PUBLIC mpp_lnk_bdy_2d, mpp_lnk_bdy_3d
80	PUBLIC mpp_lbc_north_icb, mpp_lnk_2d_icb
81
82	TYPE arrayptr
83	REAL , DIMENSION (:,:), POINTER :: pt2d
84	END TYPE arrayptr
85
86	!! * Interfaces
87	!! define generic interface for these routine as they are called sometimes
88	!! with scalar arguments instead of array arguments, which causes problems
89	!! for the compilation on AIX system as well as NEC and SGI. Ok on COMPACQ
90	INTERFACE mpp_min
91	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
92	END INTERFACE
93	INTERFACE mpp_max
94	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
95	END INTERFACE
96	INTERFACE mpp_sum
97	MODULE PROCEDURE mppsum_a_int, mppsum_int, mppsum_a_real, mppsum_real, &
98	mppsum_realdd, mppsum_a_realdd
99	END INTERFACE
100	INTERFACE mpp_lbc_north
101	MODULE PROCEDURE mpp_lbc_north_3d, mpp_lbc_north_2d
102	END INTERFACE
103	INTERFACE mpp_minloc
104	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
105	END INTERFACE
106	INTERFACE mpp_maxloc
107	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
108	END INTERFACE
109
110	!! ========================= !!
111	!! MPI variable definition !!
112	!! ========================= !!
113	!$AGRIF_DO_NOT_TREAT
114	INCLUDE 'mpif.h'
115	!$AGRIF_END_DO_NOT_TREAT
116
117	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .TRUE. !: mpp flag
118
119	INTEGER, PARAMETER :: nprocmax = 2**10 ! maximun dimension (required to be a power of 2)
120
121	INTEGER :: mppsize ! number of process
122	INTEGER :: mpprank ! process number [ 0 - size-1 ]
123	!$AGRIF_DO_NOT_TREAT
124	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
125	!$AGRIF_END_DO_NOT_TREAT
126
127	INTEGER :: MPI_SUMDD
128
129	! variables used in case of sea-ice
130	INTEGER, PUBLIC :: ncomm_ice !: communicator made by the processors with sea-ice (public so that it can be freed in limthd)
131	INTEGER :: ngrp_iworld ! group ID for the world processors (for rheology)
132	INTEGER :: ngrp_ice ! group ID for the ice processors (for rheology)
133	INTEGER :: ndim_rank_ice ! number of 'ice' processors
134	INTEGER :: n_ice_root ! number (in the comm_ice) of proc 0 in the ice comm
135	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_ice ! dimension ndim_rank_ice
136
137	! variables used for zonal integration
138	INTEGER, PUBLIC :: ncomm_znl !: communicator made by the processors on the same zonal average
139	LOGICAL, PUBLIC :: l_znl_root ! True on the 'left'most processor on the same row
140	INTEGER :: ngrp_znl ! group ID for the znl processors
141	INTEGER :: ndim_rank_znl ! number of processors on the same zonal average
142	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_znl ! dimension ndim_rank_znl, number of the procs into the same znl domain
143
144	! North fold condition in mpp_mpi with jpni > 1 (PUBLIC for TAM)
145	INTEGER, PUBLIC :: ngrp_world ! group ID for the world processors
146	INTEGER, PUBLIC :: ngrp_opa ! group ID for the opa processors
147	INTEGER, PUBLIC :: ngrp_north ! group ID for the northern processors (to be fold)
148	INTEGER, PUBLIC :: ncomm_north ! communicator made by the processors belonging to ngrp_north
149	INTEGER, PUBLIC :: ndim_rank_north ! number of 'sea' processor in the northern line (can be /= jpni !)
150	INTEGER, PUBLIC :: njmppmax ! value of njmpp for the processors of the northern line
151	INTEGER, PUBLIC :: north_root ! number (in the comm_opa) of proc 0 in the northern comm
152	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE, PUBLIC :: nrank_north ! dimension ndim_rank_north
153
154	! Type of send : standard, buffered, immediate
155	CHARACTER(len=1), PUBLIC :: cn_mpi_send ! type od mpi send/recieve (S=standard, B=bsend, I=isend)
156	LOGICAL, PUBLIC :: l_isend = .FALSE. ! isend use indicator (T if cn_mpi_send='I')
157	INTEGER, PUBLIC :: nn_buffer ! size of the buffer in case of mpi_bsend
158
159	REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: tampon ! buffer in case of bsend
160
161	LOGICAL, PUBLIC :: ln_nnogather ! namelist control of northfold comms
162	LOGICAL, PUBLIC :: l_north_nogather = .FALSE. ! internal control of northfold comms
163	INTEGER, PUBLIC :: ityp
164	!!----------------------------------------------------------------------
165	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
166	!! $Id$
167	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
168	!!----------------------------------------------------------------------
169	CONTAINS
170
171
172	FUNCTION mynode( ldtxt, ldname, kumnam_ref , kumnam_cfg , kumond , kstop, localComm )
173	!!----------------------------------------------------------------------
174	!! * routine mynode *
175	!!
176	!! ** Purpose : Find processor unit
177	!!----------------------------------------------------------------------
178	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
179	CHARACTER(len=*) , INTENT(in ) :: ldname
180	INTEGER , INTENT(in ) :: kumnam_ref ! logical unit for reference namelist
181	INTEGER , INTENT(in ) :: kumnam_cfg ! logical unit for configuration namelist
182	INTEGER , INTENT(inout) :: kumond ! logical unit for namelist output
183	INTEGER , INTENT(inout) :: kstop ! stop indicator
184	INTEGER, OPTIONAL , INTENT(in ) :: localComm
185	!
186	INTEGER :: mynode, ierr, code, ji, ii, ios
187	LOGICAL :: mpi_was_called
188	!
189	NAMELIST/nammpp/ cn_mpi_send, nn_buffer, jpni, jpnj, jpnij, ln_nnogather
190	!!----------------------------------------------------------------------
191	!
192	ii = 1
193	WRITE(ldtxt(ii),*) ; ii = ii + 1
194	WRITE(ldtxt(ii),*) 'mynode : mpi initialisation' ; ii = ii + 1
195	WRITE(ldtxt(ii),*) '~~~~~~ ' ; ii = ii + 1
196	!
197
198	REWIND( kumnam_ref ) ! Namelist nammpp in reference namelist: mpi variables
199	READ ( kumnam_ref, nammpp, IOSTAT = ios, ERR = 901)
200	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in reference namelist', lwp )
201
202	REWIND( kumnam_cfg ) ! Namelist nammpp in configuration namelist: mpi variables
203	READ ( kumnam_cfg, nammpp, IOSTAT = ios, ERR = 902 )
204	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in configuration namelist', lwp )
205
206	! ! control print
207	WRITE(ldtxt(ii),*) ' Namelist nammpp' ; ii = ii + 1
208	WRITE(ldtxt(ii),*) ' mpi send type cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
209	WRITE(ldtxt(ii),*) ' size in bytes of exported buffer nn_buffer = ', nn_buffer ; ii = ii + 1
210
211	#if defined key_agrif
212	IF( .NOT. Agrif_Root() ) THEN
213	jpni = Agrif_Parent(jpni )
214	jpnj = Agrif_Parent(jpnj )
215	jpnij = Agrif_Parent(jpnij)
216	ENDIF
217	#endif
218
219	IF(jpnij < 1)THEN
220	! If jpnij is not specified in namelist then we calculate it - this
221	! means there will be no land cutting out.
222	jpnij = jpni * jpnj
223	END IF
224
225	IF( (jpni < 1) .OR. (jpnj < 1) )THEN
226	WRITE(ldtxt(ii),*) ' jpni, jpnj and jpnij will be calculated automatically'; ii = ii + 1
227	ELSE
228	WRITE(ldtxt(ii),*) ' processor grid extent in i jpni = ',jpni; ii = ii + 1
229	WRITE(ldtxt(ii),*) ' processor grid extent in j jpnj = ',jpnj; ii = ii + 1
230	WRITE(ldtxt(ii),*) ' number of local domains jpnij = ',jpnij; ii = ii +1
231	END IF
232
233	WRITE(ldtxt(ii),*) ' avoid use of mpi_allgather at the north fold ln_nnogather = ', ln_nnogather ; ii = ii + 1
234
235	CALL mpi_initialized ( mpi_was_called, code )
236	IF( code /= MPI_SUCCESS ) THEN
237	DO ji = 1, SIZE(ldtxt)
238	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
239	END DO
240	WRITE(*, cform_err)
241	WRITE(, ) 'lib_mpp: Error in routine mpi_initialized'
242	CALL mpi_abort( mpi_comm_world, code, ierr )
243	ENDIF
244
245	IF( mpi_was_called ) THEN
246	!
247	SELECT CASE ( cn_mpi_send )
248	CASE ( 'S' ) ! Standard mpi send (blocking)
249	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
250	CASE ( 'B' ) ! Buffer mpi send (blocking)
251	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
252	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
253	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
254	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
255	l_isend = .TRUE.
256	CASE DEFAULT
257	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
258	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
259	kstop = kstop + 1
260	END SELECT
261	ELSE IF ( PRESENT(localComm) .and. .not. mpi_was_called ) THEN
262	WRITE(ldtxt(ii),*) ' lib_mpp: You cannot provide a local communicator ' ; ii = ii + 1
263	WRITE(ldtxt(ii),*) ' without calling MPI_Init before ! ' ; ii = ii + 1
264	kstop = kstop + 1
265	ELSE
266	SELECT CASE ( cn_mpi_send )
267	CASE ( 'S' ) ! Standard mpi send (blocking)
268	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
269	CALL mpi_init( ierr )
270	CASE ( 'B' ) ! Buffer mpi send (blocking)
271	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
272	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
273	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
274	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
275	l_isend = .TRUE.
276	CALL mpi_init( ierr )
277	CASE DEFAULT
278	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
279	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
280	kstop = kstop + 1
281	END SELECT
282	!
283	ENDIF
284
285	IF( PRESENT(localComm) ) THEN
286	IF( Agrif_Root() ) THEN
287	mpi_comm_opa = localComm
288	ENDIF
289	ELSE
290	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code)
291	IF( code /= MPI_SUCCESS ) THEN
292	DO ji = 1, SIZE(ldtxt)
293	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
294	END DO
295	WRITE(*, cform_err)
296	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
297	CALL mpi_abort( mpi_comm_world, code, ierr )
298	ENDIF
299	ENDIF
300
301	CALL mpi_comm_rank( mpi_comm_opa, mpprank, ierr )
302	CALL mpi_comm_size( mpi_comm_opa, mppsize, ierr )
303	mynode = mpprank
304
305	IF( mynode == 0 ) THEN
306	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
307	WRITE(kumond, nammpp)
308	ENDIF
309	!
310	CALL MPI_OP_CREATE(DDPDD_MPI, .TRUE., MPI_SUMDD, ierr)
311	!
312	END FUNCTION mynode
313
314	SUBROUTINE mpp_lnk_3d( ptab, cd_type, psgn, cd_mpp, pval )
315	!!----------------------------------------------------------------------
316	!! * routine mpp_lnk_3d *
317	!!
318	!! ** Purpose : Message passing manadgement
319	!!
320	!! ** Method : Use mppsend and mpprecv function for passing mask
321	!! between processors following neighboring subdomains.
322	!! domain parameters
323	!! nlci : first dimension of the local subdomain
324	!! nlcj : second dimension of the local subdomain
325	!! nbondi : mark for "east-west local boundary"
326	!! nbondj : mark for "north-south local boundary"
327	!! noea : number for local neighboring processors
328	!! nowe : number for local neighboring processors
329	!! noso : number for local neighboring processors
330	!! nono : number for local neighboring processors
331	!!
332	!! ** Action : ptab with update value at its periphery
333	!!
334	!!----------------------------------------------------------------------
335	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
336	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
337	! ! = T , U , V , F , W points
338	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
339	! ! = 1. , the sign is kept
340	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
341	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
342	!!
343	INTEGER :: ji, jj, jk, jl ! dummy loop indices
344	INTEGER :: imigr, iihom, ijhom ! temporary integers
345	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
346	REAL(wp) :: zland
347	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
348	!
349	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
350	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
351
352	!!----------------------------------------------------------------------
353
354	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
355	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
356
357	!
358	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
359	ELSE ; zland = 0.e0 ! zero by default
360	ENDIF
361
362	! 1. standard boundary treatment
363	! ------------------------------
364	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
365	!
366	! WARNING ptab is defined only between nld and nle
367	DO jk = 1, jpk
368	DO jj = nlcj+1, jpj ! added line(s) (inner only)
369	ptab(nldi :nlei , jj ,jk) = ptab(nldi:nlei, nlej,jk)
370	ptab(1 :nldi-1, jj ,jk) = ptab(nldi , nlej,jk)
371	ptab(nlei+1:nlci , jj ,jk) = ptab( nlei, nlej,jk)
372	END DO
373	DO ji = nlci+1, jpi ! added column(s) (full)
374	ptab(ji ,nldj :nlej ,jk) = ptab( nlei,nldj:nlej,jk)
375	ptab(ji ,1 :nldj-1,jk) = ptab( nlei,nldj ,jk)
376	ptab(ji ,nlej+1:jpj ,jk) = ptab( nlei, nlej,jk)
377	END DO
378	END DO
379	!
380	ELSE ! standard close or cyclic treatment
381	!
382	! ! East-West boundaries
383	! !* Cyclic east-west
384	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
385	ptab( 1 ,:,:) = ptab(jpim1,:,:)
386	ptab(jpi,:,:) = ptab( 2 ,:,:)
387	ELSE !* closed
388	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
389	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
390	ENDIF
391	! ! North-South boundaries (always closed)
392	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
393	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
394	!
395	ENDIF
396
397	! 2. East and west directions exchange
398	! ------------------------------------
399	! we play with the neigbours AND the row number because of the periodicity
400	!
401	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
402	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
403	iihom = nlci-nreci
404	DO jl = 1, jpreci
405	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
406	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
407	END DO
408	END SELECT
409	!
410	! ! Migrations
411	imigr = jpreci * jpj * jpk
412	!
413	SELECT CASE ( nbondi )
414	CASE ( -1 )
415	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
416	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
417	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
418	CASE ( 0 )
419	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
420	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
421	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
422	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
423	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
424	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
425	CASE ( 1 )
426	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
427	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
428	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
429	END SELECT
430	!
431	! ! Write Dirichlet lateral conditions
432	iihom = nlci-jpreci
433	!
434	SELECT CASE ( nbondi )
435	CASE ( -1 )
436	DO jl = 1, jpreci
437	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
438	END DO
439	CASE ( 0 )
440	DO jl = 1, jpreci
441	ptab(jl ,:,:) = zt3we(:,jl,:,2)
442	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
443	END DO
444	CASE ( 1 )
445	DO jl = 1, jpreci
446	ptab(jl ,:,:) = zt3we(:,jl,:,2)
447	END DO
448	END SELECT
449
450
451	! 3. North and south directions
452	! -----------------------------
453	! always closed : we play only with the neigbours
454	!
455	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
456	ijhom = nlcj-nrecj
457	DO jl = 1, jprecj
458	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
459	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
460	END DO
461	ENDIF
462	!
463	! ! Migrations
464	imigr = jprecj * jpi * jpk
465	!
466	SELECT CASE ( nbondj )
467	CASE ( -1 )
468	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
469	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
470	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
471	CASE ( 0 )
472	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
473	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
474	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
475	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
476	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
477	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
478	CASE ( 1 )
479	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
480	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
481	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
482	END SELECT
483	!
484	! ! Write Dirichlet lateral conditions
485	ijhom = nlcj-jprecj
486	!
487	SELECT CASE ( nbondj )
488	CASE ( -1 )
489	DO jl = 1, jprecj
490	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
491	END DO
492	CASE ( 0 )
493	DO jl = 1, jprecj
494	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
495	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
496	END DO
497	CASE ( 1 )
498	DO jl = 1, jprecj
499	ptab(:,jl,:) = zt3sn(:,jl,:,2)
500	END DO
501	END SELECT
502
503
504	! 4. north fold treatment
505	! -----------------------
506	!
507	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
508	!
509	SELECT CASE ( jpni )
510	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
511	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
512	END SELECT
513	!
514	ENDIF
515	!
516	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
517	!
518	END SUBROUTINE mpp_lnk_3d
519
520	SUBROUTINE mpp_lnk_2d_multiple( pt2d_array , type_array , psgn_array , num_fields , cd_mpp, pval )
521	!!----------------------------------------------------------------------
522	!! * routine mpp_lnk_2d_multiple *
523	!!
524	!! ** Purpose : Message passing management for multiple 2d arrays
525	!!
526	!! ** Method : Use mppsend and mpprecv function for passing mask
527	!! between processors following neighboring subdomains.
528	!! domain parameters
529	!! nlci : first dimension of the local subdomain
530	!! nlcj : second dimension of the local subdomain
531	!! nbondi : mark for "east-west local boundary"
532	!! nbondj : mark for "north-south local boundary"
533	!! noea : number for local neighboring processors
534	!! nowe : number for local neighboring processors
535	!! noso : number for local neighboring processors
536	!! nono : number for local neighboring processors
537	!!
538	!!----------------------------------------------------------------------
539
540	INTEGER :: num_fields
541	TYPE( arrayptr ), DIMENSION(:) :: pt2d_array
542	CHARACTER(len=1), DIMENSION(:), INTENT(in ) :: type_array ! define the nature of ptab array grid-points
543	! ! = T , U , V , F , W and I points
544	REAL(wp) , DIMENSION(:), INTENT(in ) :: psgn_array ! =-1 the sign change across the north fold boundary
545	! ! = 1. , the sign is kept
546	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
547	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
548	!!
549	INTEGER :: ji, jj, jl ! dummy loop indices
550	INTEGER :: ii !!MULTI SEND DUMMY LOOP INDICES
551	INTEGER :: imigr, iihom, ijhom ! temporary integers
552	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
553
554	REAL(wp) :: zland
555	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
556	!
557	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
558	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
559
560	!!----------------------------------------------------------------------
561
562	ALLOCATE( zt2ns(jpi,jprecj,2num_fields), zt2sn(jpi,jprecj,2num_fields), &
563	& zt2ew(jpj,jpreci,2num_fields), zt2we(jpj,jpreci,2num_fields) )
564
565	!
566	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
567	ELSE ; zland = 0.e0 ! zero by default
568	ENDIF
569
570	! 1. standard boundary treatment
571	! ------------------------------
572	!
573	!First Array
574	DO ii = 1 , num_fields
575	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
576	!
577	! WARNING pt2d is defined only between nld and nle
578	DO jj = nlcj+1, jpj ! added line(s) (inner only)
579	pt2d_array(ii)%pt2d(nldi :nlei , jj) = pt2d_array(ii)%pt2d(nldi:nlei, nlej)
580	pt2d_array(ii)%pt2d(1 :nldi-1, jj) = pt2d_array(ii)%pt2d(nldi , nlej)
581	pt2d_array(ii)%pt2d(nlei+1:nlci , jj) = pt2d_array(ii)%pt2d( nlei, nlej)
582	END DO
583	DO ji = nlci+1, jpi ! added column(s) (full)
584	pt2d_array(ii)%pt2d(ji, nldj :nlej ) = pt2d_array(ii)%pt2d(nlei, nldj:nlej)
585	pt2d_array(ii)%pt2d(ji, 1 :nldj-1) = pt2d_array(ii)%pt2d(nlei, nldj )
586	pt2d_array(ii)%pt2d(ji, nlej+1:jpj ) = pt2d_array(ii)%pt2d(nlei, nlej)
587	END DO
588	!
589	ELSE ! standard close or cyclic treatment
590	!
591	! ! East-West boundaries
592	IF( nbondi == 2 .AND. & ! Cyclic east-west
593	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
594	pt2d_array(ii)%pt2d( 1 , : ) = pt2d_array(ii)%pt2d( jpim1, : ) ! west
595	pt2d_array(ii)%pt2d( jpi , : ) = pt2d_array(ii)%pt2d( 2 , : ) ! east
596	ELSE ! closed
597	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d( 1 : jpreci,:) = zland ! south except F-point
598	pt2d_array(ii)%pt2d(nlci-jpreci+1 : jpi ,:) = zland ! north
599	ENDIF
600	! ! North-South boundaries (always closed)
601	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d(:, 1:jprecj ) = zland ! south except F-point
602	pt2d_array(ii)%pt2d(:, nlcj-jprecj+1:jpj ) = zland ! north
603	!
604	ENDIF
605	END DO
606
607	! 2. East and west directions exchange
608	! ------------------------------------
609	! we play with the neigbours AND the row number because of the periodicity
610	!
611	DO ii = 1 , num_fields
612	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
613	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
614	iihom = nlci-nreci
615	DO jl = 1, jpreci
616	zt2ew( : , jl , ii ) = pt2d_array(ii)%pt2d( jpreci+jl , : )
617	zt2we( : , jl , ii ) = pt2d_array(ii)%pt2d( iihom +jl , : )
618	END DO
619	END SELECT
620	END DO
621	!
622	! ! Migrations
623	imigr = jpreci * jpj
624	!
625	SELECT CASE ( nbondi )
626	CASE ( -1 )
627	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req1 )
628	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
629	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
630	CASE ( 0 )
631	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
632	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req2 )
633	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
634	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
635	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
636	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
637	CASE ( 1 )
638	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
639	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
640	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
641	END SELECT
642	!
643	! ! Write Dirichlet lateral conditions
644	iihom = nlci - jpreci
645	!
646
647	DO ii = 1 , num_fields
648	SELECT CASE ( nbondi )
649	CASE ( -1 )
650	DO jl = 1, jpreci
651	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
652	END DO
653	CASE ( 0 )
654	DO jl = 1, jpreci
655	pt2d_array(ii)%pt2d( jl , : ) = zt2we(:,jl,num_fields+ii)
656	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
657	END DO
658	CASE ( 1 )
659	DO jl = 1, jpreci
660	pt2d_array(ii)%pt2d( jl , : )= zt2we(:,jl,num_fields+ii)
661	END DO
662	END SELECT
663	END DO
664
665	! 3. North and south directions
666	! -----------------------------
667	! always closed : we play only with the neigbours
668	!
669	!First Array
670	DO ii = 1 , num_fields
671	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
672	ijhom = nlcj-nrecj
673	DO jl = 1, jprecj
674	zt2sn(:,jl , ii) = pt2d_array(ii)%pt2d( : , ijhom +jl )
675	zt2ns(:,jl , ii) = pt2d_array(ii)%pt2d( : , jprecj+jl )
676	END DO
677	ENDIF
678	END DO
679	!
680	! ! Migrations
681	imigr = jprecj * jpi
682	!
683	SELECT CASE ( nbondj )
684	CASE ( -1 )
685	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req1 )
686	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
687	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
688	CASE ( 0 )
689	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
690	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req2 )
691	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
692	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
693	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
694	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
695	CASE ( 1 )
696	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
697	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
698	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
699	END SELECT
700	!
701	! ! Write Dirichlet lateral conditions
702	ijhom = nlcj - jprecj
703	!
704
705	DO ii = 1 , num_fields
706	!First Array
707	SELECT CASE ( nbondj )
708	CASE ( -1 )
709	DO jl = 1, jprecj
710	pt2d_array(ii)%pt2d( : , ijhom+jl ) = zt2ns( : , jl , num_fields+ii )
711	END DO
712	CASE ( 0 )
713	DO jl = 1, jprecj
714	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii)
715	pt2d_array(ii)%pt2d( : , ijhom + jl ) = zt2ns( : , jl , num_fields + ii )
716	END DO
717	CASE ( 1 )
718	DO jl = 1, jprecj
719	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii )
720	END DO
721	END SELECT
722	END DO
723
724	! 4. north fold treatment
725	! -----------------------
726	!
727	DO ii = 1 , num_fields
728	!First Array
729	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
730	!
731	SELECT CASE ( jpni )
732	CASE ( 1 ) ; CALL lbc_nfd ( pt2d_array(ii)%pt2d( : , : ), type_array(ii) , psgn_array(ii) ) ! only 1 northern proc, no mpp
733	CASE DEFAULT ; CALL mpp_lbc_north( pt2d_array(ii)%pt2d( : , : ), type_array(ii), psgn_array(ii) ) ! for all northern procs.
734	END SELECT
735	!
736	ENDIF
737	!
738	END DO
739
740	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
741	!
742	END SUBROUTINE mpp_lnk_2d_multiple
743
744
745	SUBROUTINE load_array(pt2d,cd_type,psgn,pt2d_array, type_array, psgn_array,num_fields)
746	!!---------------------------------------------------------------------
747	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2d ! Second 2D array on which the boundary condition is applied
748	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
749	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
750	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
751	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
752	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
753	INTEGER , INTENT (inout):: num_fields
754	!!---------------------------------------------------------------------
755	num_fields=num_fields+1
756	pt2d_array(num_fields)%pt2d=>pt2d
757	type_array(num_fields)=cd_type
758	psgn_array(num_fields)=psgn
759	END SUBROUTINE load_array
760
761
762	SUBROUTINE mpp_lnk_2d_9( pt2dA, cd_typeA, psgnA, pt2dB, cd_typeB, psgnB, pt2dC, cd_typeC, psgnC &
763	& , pt2dD, cd_typeD, psgnD, pt2dE, cd_typeE, psgnE, pt2dF, cd_typeF, psgnF &
764	& , pt2dG, cd_typeG, psgnG, pt2dH, cd_typeH, psgnH, pt2dI, cd_typeI, psgnI, cd_mpp, pval)
765	!!---------------------------------------------------------------------
766	! Second 2D array on which the boundary condition is applied
767	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2dA
768	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dB , pt2dC , pt2dD , pt2dE
769	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dF , pt2dG , pt2dH , pt2dI
770	! define the nature of ptab array grid-points
771	CHARACTER(len=1) , INTENT(in ) :: cd_typeA
772	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeB , cd_typeC , cd_typeD , cd_typeE
773	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeF , cd_typeG , cd_typeH , cd_typeI
774	! =-1 the sign change across the north fold boundary
775	REAL(wp) , INTENT(in ) :: psgnA
776	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnB , psgnC , psgnD , psgnE
777	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnF , psgnG , psgnH , psgnI
778	CHARACTER(len=3) , OPTIONAL, INTENT(in ) :: cd_mpp ! fill the overlap area only
779	REAL(wp) , OPTIONAL, INTENT(in ) :: pval ! background value (used at closed boundaries)
780	!!
781	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
782	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
783	! ! = T , U , V , F , W and I points
784	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
785	INTEGER :: num_fields
786	!!---------------------------------------------------------------------
787
788	num_fields = 0
789
790	!! Load the first array
791	CALL load_array(pt2dA,cd_typeA,psgnA,pt2d_array, type_array, psgn_array,num_fields)
792
793	!! Look if more arrays are added
794	IF(PRESENT (psgnB) )CALL load_array(pt2dB,cd_typeB,psgnB,pt2d_array, type_array, psgn_array,num_fields)
795	IF(PRESENT (psgnC) )CALL load_array(pt2dC,cd_typeC,psgnC,pt2d_array, type_array, psgn_array,num_fields)
796	IF(PRESENT (psgnD) )CALL load_array(pt2dD,cd_typeD,psgnD,pt2d_array, type_array, psgn_array,num_fields)
797	IF(PRESENT (psgnE) )CALL load_array(pt2dE,cd_typeE,psgnE,pt2d_array, type_array, psgn_array,num_fields)
798	IF(PRESENT (psgnF) )CALL load_array(pt2dF,cd_typeF,psgnF,pt2d_array, type_array, psgn_array,num_fields)
799	IF(PRESENT (psgnG) )CALL load_array(pt2dG,cd_typeG,psgnG,pt2d_array, type_array, psgn_array,num_fields)
800	IF(PRESENT (psgnH) )CALL load_array(pt2dH,cd_typeH,psgnH,pt2d_array, type_array, psgn_array,num_fields)
801	IF(PRESENT (psgnI) )CALL load_array(pt2dI,cd_typeI,psgnI,pt2d_array, type_array, psgn_array,num_fields)
802
803	CALL mpp_lnk_2d_multiple(pt2d_array,type_array,psgn_array,num_fields,cd_mpp,pval)
804	END SUBROUTINE mpp_lnk_2d_9
805
806
807	SUBROUTINE mpp_lnk_2d( pt2d, cd_type, psgn, cd_mpp, pval )
808	!!----------------------------------------------------------------------
809	!! * routine mpp_lnk_2d *
810	!!
811	!! ** Purpose : Message passing manadgement for 2d array
812	!!
813	!! ** Method : Use mppsend and mpprecv function for passing mask
814	!! between processors following neighboring subdomains.
815	!! domain parameters
816	!! nlci : first dimension of the local subdomain
817	!! nlcj : second dimension of the local subdomain
818	!! nbondi : mark for "east-west local boundary"
819	!! nbondj : mark for "north-south local boundary"
820	!! noea : number for local neighboring processors
821	!! nowe : number for local neighboring processors
822	!! noso : number for local neighboring processors
823	!! nono : number for local neighboring processors
824	!!
825	!!----------------------------------------------------------------------
826	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the boundary condition is applied
827	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
828	! ! = T , U , V , F , W and I points
829	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
830	! ! = 1. , the sign is kept
831	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
832	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
833	!!
834	INTEGER :: ji, jj, jl ! dummy loop indices
835	INTEGER :: imigr, iihom, ijhom ! temporary integers
836	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
837	REAL(wp) :: zland
838	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
839	!
840	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
841	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
842
843	!!----------------------------------------------------------------------
844
845	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
846	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
847
848	!
849	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
850	ELSE ; zland = 0.e0 ! zero by default
851	ENDIF
852
853	! 1. standard boundary treatment
854	! ------------------------------
855	!
856	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
857	!
858	! WARNING pt2d is defined only between nld and nle
859	DO jj = nlcj+1, jpj ! added line(s) (inner only)
860	pt2d(nldi :nlei , jj ) = pt2d(nldi:nlei, nlej)
861	pt2d(1 :nldi-1, jj ) = pt2d(nldi , nlej)
862	pt2d(nlei+1:nlci , jj ) = pt2d( nlei, nlej)
863	END DO
864	DO ji = nlci+1, jpi ! added column(s) (full)
865	pt2d(ji ,nldj :nlej ) = pt2d( nlei,nldj:nlej)
866	pt2d(ji ,1 :nldj-1) = pt2d( nlei,nldj )
867	pt2d(ji ,nlej+1:jpj ) = pt2d( nlei, nlej)
868	END DO
869	!
870	ELSE ! standard close or cyclic treatment
871	!
872	! ! East-West boundaries
873	IF( nbondi == 2 .AND. & ! Cyclic east-west
874	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
875	pt2d( 1 ,:) = pt2d(jpim1,:) ! west
876	pt2d(jpi,:) = pt2d( 2 ,:) ! east
877	ELSE ! closed
878	IF( .NOT. cd_type == 'F' ) pt2d( 1 :jpreci,:) = zland ! south except F-point
879	pt2d(nlci-jpreci+1:jpi ,:) = zland ! north
880	ENDIF
881	! ! North-South boundaries (always closed)
882	IF( .NOT. cd_type == 'F' ) pt2d(:, 1 :jprecj) = zland !south except F-point
883	pt2d(:,nlcj-jprecj+1:jpj ) = zland ! north
884	!
885	ENDIF
886
887	! 2. East and west directions exchange
888	! ------------------------------------
889	! we play with the neigbours AND the row number because of the periodicity
890	!
891	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
892	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
893	iihom = nlci-nreci
894	DO jl = 1, jpreci
895	zt2ew(:,jl,1) = pt2d(jpreci+jl,:)
896	zt2we(:,jl,1) = pt2d(iihom +jl,:)
897	END DO
898	END SELECT
899	!
900	! ! Migrations
901	imigr = jpreci * jpj
902	!
903	SELECT CASE ( nbondi )
904	CASE ( -1 )
905	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
906	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
907	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
908	CASE ( 0 )
909	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
910	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
911	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
912	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
913	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
914	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
915	CASE ( 1 )
916	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
917	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
918	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
919	END SELECT
920	!
921	! ! Write Dirichlet lateral conditions
922	iihom = nlci - jpreci
923	!
924	SELECT CASE ( nbondi )
925	CASE ( -1 )
926	DO jl = 1, jpreci
927	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
928	END DO
929	CASE ( 0 )
930	DO jl = 1, jpreci
931	pt2d(jl ,:) = zt2we(:,jl,2)
932	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
933	END DO
934	CASE ( 1 )
935	DO jl = 1, jpreci
936	pt2d(jl ,:) = zt2we(:,jl,2)
937	END DO
938	END SELECT
939
940
941	! 3. North and south directions
942	! -----------------------------
943	! always closed : we play only with the neigbours
944	!
945	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
946	ijhom = nlcj-nrecj
947	DO jl = 1, jprecj
948	zt2sn(:,jl,1) = pt2d(:,ijhom +jl)
949	zt2ns(:,jl,1) = pt2d(:,jprecj+jl)
950	END DO
951	ENDIF
952	!
953	! ! Migrations
954	imigr = jprecj * jpi
955	!
956	SELECT CASE ( nbondj )
957	CASE ( -1 )
958	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
959	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
960	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
961	CASE ( 0 )
962	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
963	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
964	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
965	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
966	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
967	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
968	CASE ( 1 )
969	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
970	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
971	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
972	END SELECT
973	!
974	! ! Write Dirichlet lateral conditions
975	ijhom = nlcj - jprecj
976	!
977	SELECT CASE ( nbondj )
978	CASE ( -1 )
979	DO jl = 1, jprecj
980	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
981	END DO
982	CASE ( 0 )
983	DO jl = 1, jprecj
984	pt2d(:,jl ) = zt2sn(:,jl,2)
985	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
986	END DO
987	CASE ( 1 )
988	DO jl = 1, jprecj
989	pt2d(:,jl ) = zt2sn(:,jl,2)
990	END DO
991	END SELECT
992
993
994	! 4. north fold treatment
995	! -----------------------
996	!
997	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
998	!
999	SELECT CASE ( jpni )
1000	CASE ( 1 ) ; CALL lbc_nfd ( pt2d, cd_type, psgn ) ! only 1 northern proc, no mpp
1001	CASE DEFAULT ; CALL mpp_lbc_north( pt2d, cd_type, psgn ) ! for all northern procs.
1002	END SELECT
1003	!
1004	ENDIF
1005	!
1006	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
1007	!
1008	END SUBROUTINE mpp_lnk_2d
1009
1010
1011	SUBROUTINE mpp_lnk_3d_gather( ptab1, cd_type1, ptab2, cd_type2, psgn )
1012	!!----------------------------------------------------------------------
1013	!! * routine mpp_lnk_3d_gather *
1014	!!
1015	!! ** Purpose : Message passing manadgement for two 3D arrays
1016	!!
1017	!! ** Method : Use mppsend and mpprecv function for passing mask
1018	!! between processors following neighboring subdomains.
1019	!! domain parameters
1020	!! nlci : first dimension of the local subdomain
1021	!! nlcj : second dimension of the local subdomain
1022	!! nbondi : mark for "east-west local boundary"
1023	!! nbondj : mark for "north-south local boundary"
1024	!! noea : number for local neighboring processors
1025	!! nowe : number for local neighboring processors
1026	!! noso : number for local neighboring processors
1027	!! nono : number for local neighboring processors
1028	!!
1029	!! ** Action : ptab1 and ptab2 with update value at its periphery
1030	!!
1031	!!----------------------------------------------------------------------
1032	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab1 ! first and second 3D array on which
1033	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab2 ! the boundary condition is applied
1034	CHARACTER(len=1) , INTENT(in ) :: cd_type1 ! nature of ptab1 and ptab2 arrays
1035	CHARACTER(len=1) , INTENT(in ) :: cd_type2 ! i.e. grid-points = T , U , V , F or W points
1036	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
1037	!! ! = 1. , the sign is kept
1038	INTEGER :: jl ! dummy loop indices
1039	INTEGER :: imigr, iihom, ijhom ! temporary integers
1040	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1041	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1042	!
1043	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ns, zt4sn ! 2 x 3d for north-south & south-north
1044	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ew, zt4we ! 2 x 3d for east-west & west-east
1045
1046	!!----------------------------------------------------------------------
1047	ALLOCATE( zt4ns(jpi,jprecj,jpk,2,2), zt4sn(jpi,jprecj,jpk,2,2) , &
1048	& zt4ew(jpj,jpreci,jpk,2,2), zt4we(jpj,jpreci,jpk,2,2) )
1049
1050
1051	! 1. standard boundary treatment
1052	! ------------------------------
1053	! ! East-West boundaries
1054	! !* Cyclic east-west
1055	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1056	ptab1( 1 ,:,:) = ptab1(jpim1,:,:)
1057	ptab1(jpi,:,:) = ptab1( 2 ,:,:)
1058	ptab2( 1 ,:,:) = ptab2(jpim1,:,:)
1059	ptab2(jpi,:,:) = ptab2( 2 ,:,:)
1060	ELSE !* closed
1061	IF( .NOT. cd_type1 == 'F' ) ptab1( 1 :jpreci,:,:) = 0.e0 ! south except at F-point
1062	IF( .NOT. cd_type2 == 'F' ) ptab2( 1 :jpreci,:,:) = 0.e0
1063	ptab1(nlci-jpreci+1:jpi ,:,:) = 0.e0 ! north
1064	ptab2(nlci-jpreci+1:jpi ,:,:) = 0.e0
1065	ENDIF
1066
1067
1068	! ! North-South boundaries
1069	IF( .NOT. cd_type1 == 'F' ) ptab1(:, 1 :jprecj,:) = 0.e0 ! south except at F-point
1070	IF( .NOT. cd_type2 == 'F' ) ptab2(:, 1 :jprecj,:) = 0.e0
1071	ptab1(:,nlcj-jprecj+1:jpj ,:) = 0.e0 ! north
1072	ptab2(:,nlcj-jprecj+1:jpj ,:) = 0.e0
1073
1074
1075	! 2. East and west directions exchange
1076	! ------------------------------------
1077	! we play with the neigbours AND the row number because of the periodicity
1078	!
1079	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1080	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1081	iihom = nlci-nreci
1082	DO jl = 1, jpreci
1083	zt4ew(:,jl,:,1,1) = ptab1(jpreci+jl,:,:)
1084	zt4we(:,jl,:,1,1) = ptab1(iihom +jl,:,:)
1085	zt4ew(:,jl,:,2,1) = ptab2(jpreci+jl,:,:)
1086	zt4we(:,jl,:,2,1) = ptab2(iihom +jl,:,:)
1087	END DO
1088	END SELECT
1089	!
1090	! ! Migrations
1091	imigr = jpreci * jpj * jpk *2
1092	!
1093	SELECT CASE ( nbondi )
1094	CASE ( -1 )
1095	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req1 )
1096	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1097	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1098	CASE ( 0 )
1099	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1100	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req2 )
1101	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1102	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1103	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1104	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1105	CASE ( 1 )
1106	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1107	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1108	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1109	END SELECT
1110	!
1111	! ! Write Dirichlet lateral conditions
1112	iihom = nlci - jpreci
1113	!
1114	SELECT CASE ( nbondi )
1115	CASE ( -1 )
1116	DO jl = 1, jpreci
1117	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1118	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1119	END DO
1120	CASE ( 0 )
1121	DO jl = 1, jpreci
1122	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1123	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1124	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1125	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1126	END DO
1127	CASE ( 1 )
1128	DO jl = 1, jpreci
1129	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1130	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1131	END DO
1132	END SELECT
1133
1134
1135	! 3. North and south directions
1136	! -----------------------------
1137	! always closed : we play only with the neigbours
1138	!
1139	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1140	ijhom = nlcj - nrecj
1141	DO jl = 1, jprecj
1142	zt4sn(:,jl,:,1,1) = ptab1(:,ijhom +jl,:)
1143	zt4ns(:,jl,:,1,1) = ptab1(:,jprecj+jl,:)
1144	zt4sn(:,jl,:,2,1) = ptab2(:,ijhom +jl,:)
1145	zt4ns(:,jl,:,2,1) = ptab2(:,jprecj+jl,:)
1146	END DO
1147	ENDIF
1148	!
1149	! ! Migrations
1150	imigr = jprecj * jpi * jpk * 2
1151	!
1152	SELECT CASE ( nbondj )
1153	CASE ( -1 )
1154	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req1 )
1155	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1156	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1157	CASE ( 0 )
1158	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1159	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req2 )
1160	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1161	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1162	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1163	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1164	CASE ( 1 )
1165	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1166	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1167	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1168	END SELECT
1169	!
1170	! ! Write Dirichlet lateral conditions
1171	ijhom = nlcj - jprecj
1172	!
1173	SELECT CASE ( nbondj )
1174	CASE ( -1 )
1175	DO jl = 1, jprecj
1176	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1177	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1178	END DO
1179	CASE ( 0 )
1180	DO jl = 1, jprecj
1181	ptab1(:,jl ,:) = zt4sn(:,jl,:,1,2)
1182	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1183	ptab2(:,jl ,:) = zt4sn(:,jl,:,2,2)
1184	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1185	END DO
1186	CASE ( 1 )
1187	DO jl = 1, jprecj
1188	ptab1(:,jl,:) = zt4sn(:,jl,:,1,2)
1189	ptab2(:,jl,:) = zt4sn(:,jl,:,2,2)
1190	END DO
1191	END SELECT
1192
1193
1194	! 4. north fold treatment
1195	! -----------------------
1196	IF( npolj /= 0 ) THEN
1197	!
1198	SELECT CASE ( jpni )
1199	CASE ( 1 )
1200	CALL lbc_nfd ( ptab1, cd_type1, psgn ) ! only for northern procs.
1201	CALL lbc_nfd ( ptab2, cd_type2, psgn )
1202	CASE DEFAULT
1203	CALL mpp_lbc_north( ptab1, cd_type1, psgn ) ! for all northern procs.
1204	CALL mpp_lbc_north (ptab2, cd_type2, psgn)
1205	END SELECT
1206	!
1207	ENDIF
1208	!
1209	DEALLOCATE( zt4ns, zt4sn, zt4ew, zt4we )
1210	!
1211	END SUBROUTINE mpp_lnk_3d_gather
1212
1213
1214	SUBROUTINE mpp_lnk_2d_e( pt2d, cd_type, psgn, jpri, jprj )
1215	!!----------------------------------------------------------------------
1216	!! * routine mpp_lnk_2d_e *
1217	!!
1218	!! ** Purpose : Message passing manadgement for 2d array (with halo)
1219	!!
1220	!! ** Method : Use mppsend and mpprecv function for passing mask
1221	!! between processors following neighboring subdomains.
1222	!! domain parameters
1223	!! nlci : first dimension of the local subdomain
1224	!! nlcj : second dimension of the local subdomain
1225	!! jpri : number of rows for extra outer halo
1226	!! jprj : number of columns for extra outer halo
1227	!! nbondi : mark for "east-west local boundary"
1228	!! nbondj : mark for "north-south local boundary"
1229	!! noea : number for local neighboring processors
1230	!! nowe : number for local neighboring processors
1231	!! noso : number for local neighboring processors
1232	!! nono : number for local neighboring processors
1233	!!
1234	!!----------------------------------------------------------------------
1235	INTEGER , INTENT(in ) :: jpri
1236	INTEGER , INTENT(in ) :: jprj
1237	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
1238	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
1239	! ! = T , U , V , F , W and I points
1240	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
1241	!! ! north boundary, = 1. otherwise
1242	INTEGER :: jl ! dummy loop indices
1243	INTEGER :: imigr, iihom, ijhom ! temporary integers
1244	INTEGER :: ipreci, iprecj ! temporary integers
1245	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1246	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1247	!!
1248	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
1249	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
1250	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
1251	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
1252	!!----------------------------------------------------------------------
1253
1254	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
1255	iprecj = jprecj + jprj
1256
1257
1258	! 1. standard boundary treatment
1259	! ------------------------------
1260	! Order matters Here !!!!
1261	!
1262	! !* North-South boundaries (always colsed)
1263	IF( .NOT. cd_type == 'F' ) pt2d(:, 1-jprj : jprecj ) = 0.e0 ! south except at F-point
1264	pt2d(:,nlcj-jprecj+1:jpj+jprj) = 0.e0 ! north
1265
1266	! ! East-West boundaries
1267	! !* Cyclic east-west
1268	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1269	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
1270	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
1271	!
1272	ELSE !* closed
1273	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
1274	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
1275	ENDIF
1276	!
1277
1278	! north fold treatment
1279	! -----------------------
1280	IF( npolj /= 0 ) THEN
1281	!
1282	SELECT CASE ( jpni )
1283	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
1284	CASE DEFAULT ; CALL mpp_lbc_north_e( pt2d , cd_type, psgn )
1285	END SELECT
1286	!
1287	ENDIF
1288
1289	! 2. East and west directions exchange
1290	! ------------------------------------
1291	! we play with the neigbours AND the row number because of the periodicity
1292	!
1293	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1294	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1295	iihom = nlci-nreci-jpri
1296	DO jl = 1, ipreci
1297	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
1298	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
1299	END DO
1300	END SELECT
1301	!
1302	! ! Migrations
1303	imigr = ipreci * ( jpj + 2*jprj)
1304	!
1305	SELECT CASE ( nbondi )
1306	CASE ( -1 )
1307	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
1308	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1309	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1310	CASE ( 0 )
1311	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1312	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
1313	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1314	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1315	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1316	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1317	CASE ( 1 )
1318	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1319	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1320	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1321	END SELECT
1322	!
1323	! ! Write Dirichlet lateral conditions
1324	iihom = nlci - jpreci
1325	!
1326	SELECT CASE ( nbondi )
1327	CASE ( -1 )
1328	DO jl = 1, ipreci
1329	pt2d(iihom+jl,:) = r2dew(:,jl,2)
1330	END DO
1331	CASE ( 0 )
1332	DO jl = 1, ipreci
1333	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1334	pt2d( iihom+jl,:) = r2dew(:,jl,2)
1335	END DO
1336	CASE ( 1 )
1337	DO jl = 1, ipreci
1338	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1339	END DO
1340	END SELECT
1341
1342
1343	! 3. North and south directions
1344	! -----------------------------
1345	! always closed : we play only with the neigbours
1346	!
1347	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1348	ijhom = nlcj-nrecj-jprj
1349	DO jl = 1, iprecj
1350	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
1351	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
1352	END DO
1353	ENDIF
1354	!
1355	! ! Migrations
1356	imigr = iprecj * ( jpi + 2*jpri )
1357	!
1358	SELECT CASE ( nbondj )
1359	CASE ( -1 )
1360	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
1361	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1362	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1363	CASE ( 0 )
1364	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1365	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
1366	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1367	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1368	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1369	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1370	CASE ( 1 )
1371	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1372	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1373	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1374	END SELECT
1375	!
1376	! ! Write Dirichlet lateral conditions
1377	ijhom = nlcj - jprecj
1378	!
1379	SELECT CASE ( nbondj )
1380	CASE ( -1 )
1381	DO jl = 1, iprecj
1382	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
1383	END DO
1384	CASE ( 0 )
1385	DO jl = 1, iprecj
1386	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1387	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
1388	END DO
1389	CASE ( 1 )
1390	DO jl = 1, iprecj
1391	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1392	END DO
1393	END SELECT
1394
1395	END SUBROUTINE mpp_lnk_2d_e
1396
1397
1398	SUBROUTINE mppsend( ktyp, pmess, kbytes, kdest, md_req )
1399	!!----------------------------------------------------------------------
1400	!! * routine mppsend *
1401	!!
1402	!! ** Purpose : Send messag passing array
1403	!!
1404	!!----------------------------------------------------------------------
1405	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1406	INTEGER , INTENT(in ) :: kbytes ! size of the array pmess
1407	INTEGER , INTENT(in ) :: kdest ! receive process number
1408	INTEGER , INTENT(in ) :: ktyp ! tag of the message
1409	INTEGER , INTENT(in ) :: md_req ! argument for isend
1410	!!
1411	INTEGER :: iflag
1412	!!----------------------------------------------------------------------
1413	!
1414	SELECT CASE ( cn_mpi_send )
1415	CASE ( 'S' ) ! Standard mpi send (blocking)
1416	CALL mpi_send ( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1417	CASE ( 'B' ) ! Buffer mpi send (blocking)
1418	CALL mpi_bsend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1419	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
1420	! be carefull, one more argument here : the mpi request identifier..
1421	CALL mpi_isend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa, md_req, iflag )
1422	END SELECT
1423	!
1424	END SUBROUTINE mppsend
1425
1426
1427	SUBROUTINE mpprecv( ktyp, pmess, kbytes, ksource )
1428	!!----------------------------------------------------------------------
1429	!! * routine mpprecv *
1430	!!
1431	!! ** Purpose : Receive messag passing array
1432	!!
1433	!!----------------------------------------------------------------------
1434	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1435	INTEGER , INTENT(in ) :: kbytes ! suze of the array pmess
1436	INTEGER , INTENT(in ) :: ktyp ! Tag of the recevied message
1437	INTEGER, OPTIONAL, INTENT(in) :: ksource ! source process number
1438	!!
1439	INTEGER :: istatus(mpi_status_size)
1440	INTEGER :: iflag
1441	INTEGER :: use_source
1442	!!----------------------------------------------------------------------
1443	!
1444
1445	! If a specific process number has been passed to the receive call,
1446	! use that one. Default is to use mpi_any_source
1447	use_source=mpi_any_source
1448	if(present(ksource)) then
1449	use_source=ksource
1450	end if
1451
1452	CALL mpi_recv( pmess, kbytes, mpi_double_precision, use_source, ktyp, mpi_comm_opa, istatus, iflag )
1453	!
1454	END SUBROUTINE mpprecv
1455
1456
1457	SUBROUTINE mppgather( ptab, kp, pio )
1458	!!----------------------------------------------------------------------
1459	!! * routine mppgather *
1460	!!
1461	!! ** Purpose : Transfert between a local subdomain array and a work
1462	!! array which is distributed following the vertical level.
1463	!!
1464	!!----------------------------------------------------------------------
1465	REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: ptab ! subdomain input array
1466	INTEGER , INTENT(in ) :: kp ! record length
1467	REAL(wp), DIMENSION(jpi,jpj,jpnij), INTENT( out) :: pio ! subdomain input array
1468	!!
1469	INTEGER :: itaille, ierror ! temporary integer
1470	!!---------------------------------------------------------------------
1471	!
1472	itaille = jpi * jpj
1473	CALL mpi_gather( ptab, itaille, mpi_double_precision, pio, itaille , &
1474	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1475	!
1476	END SUBROUTINE mppgather
1477
1478
1479	SUBROUTINE mppscatter( pio, kp, ptab )
1480	!!----------------------------------------------------------------------
1481	!! * routine mppscatter *
1482	!!
1483	!! ** Purpose : Transfert between awork array which is distributed
1484	!! following the vertical level and the local subdomain array.
1485	!!
1486	!!----------------------------------------------------------------------
1487	REAL(wp), DIMENSION(jpi,jpj,jpnij) :: pio ! output array
1488	INTEGER :: kp ! Tag (not used with MPI
1489	REAL(wp), DIMENSION(jpi,jpj) :: ptab ! subdomain array input
1490	!!
1491	INTEGER :: itaille, ierror ! temporary integer
1492	!!---------------------------------------------------------------------
1493	!
1494	itaille=jpi*jpj
1495	!
1496	CALL mpi_scatter( pio, itaille, mpi_double_precision, ptab, itaille , &
1497	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1498	!
1499	END SUBROUTINE mppscatter
1500
1501
1502	SUBROUTINE mppmax_a_int( ktab, kdim, kcom )
1503	!!----------------------------------------------------------------------
1504	!! * routine mppmax_a_int *
1505	!!
1506	!! ** Purpose : Find maximum value in an integer layout array
1507	!!
1508	!!----------------------------------------------------------------------
1509	INTEGER , INTENT(in ) :: kdim ! size of array
1510	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1511	INTEGER , INTENT(in ), OPTIONAL :: kcom !
1512	!!
1513	INTEGER :: ierror, localcomm ! temporary integer
1514	INTEGER, DIMENSION(kdim) :: iwork
1515	!!----------------------------------------------------------------------
1516	!
1517	localcomm = mpi_comm_opa
1518	IF( PRESENT(kcom) ) localcomm = kcom
1519	!
1520	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_max, localcomm, ierror )
1521	!
1522	ktab(:) = iwork(:)
1523	!
1524	END SUBROUTINE mppmax_a_int
1525
1526
1527	SUBROUTINE mppmax_int( ktab, kcom )
1528	!!----------------------------------------------------------------------
1529	!! * routine mppmax_int *
1530	!!
1531	!! ** Purpose : Find maximum value in an integer layout array
1532	!!
1533	!!----------------------------------------------------------------------
1534	INTEGER, INTENT(inout) :: ktab ! ???
1535	INTEGER, INTENT(in ), OPTIONAL :: kcom ! ???
1536	!!
1537	INTEGER :: ierror, iwork, localcomm ! temporary integer
1538	!!----------------------------------------------------------------------
1539	!
1540	localcomm = mpi_comm_opa
1541	IF( PRESENT(kcom) ) localcomm = kcom
1542	!
1543	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_max, localcomm, ierror)
1544	!
1545	ktab = iwork
1546	!
1547	END SUBROUTINE mppmax_int
1548
1549
1550	SUBROUTINE mppmin_a_int( ktab, kdim, kcom )
1551	!!----------------------------------------------------------------------
1552	!! * routine mppmin_a_int *
1553	!!
1554	!! ** Purpose : Find minimum value in an integer layout array
1555	!!
1556	!!----------------------------------------------------------------------
1557	INTEGER , INTENT( in ) :: kdim ! size of array
1558	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1559	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1560	!!
1561	INTEGER :: ierror, localcomm ! temporary integer
1562	INTEGER, DIMENSION(kdim) :: iwork
1563	!!----------------------------------------------------------------------
1564	!
1565	localcomm = mpi_comm_opa
1566	IF( PRESENT(kcom) ) localcomm = kcom
1567	!
1568	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_min, localcomm, ierror )
1569	!
1570	ktab(:) = iwork(:)
1571	!
1572	END SUBROUTINE mppmin_a_int
1573
1574
1575	SUBROUTINE mppmin_int( ktab, kcom )
1576	!!----------------------------------------------------------------------
1577	!! * routine mppmin_int *
1578	!!
1579	!! ** Purpose : Find minimum value in an integer layout array
1580	!!
1581	!!----------------------------------------------------------------------
1582	INTEGER, INTENT(inout) :: ktab ! ???
1583	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1584	!!
1585	INTEGER :: ierror, iwork, localcomm
1586	!!----------------------------------------------------------------------
1587	!
1588	localcomm = mpi_comm_opa
1589	IF( PRESENT(kcom) ) localcomm = kcom
1590	!
1591	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_min, localcomm, ierror )
1592	!
1593	ktab = iwork
1594	!
1595	END SUBROUTINE mppmin_int
1596
1597
1598	SUBROUTINE mppsum_a_int( ktab, kdim )
1599	!!----------------------------------------------------------------------
1600	!! * routine mppsum_a_int *
1601	!!
1602	!! ** Purpose : Global integer sum, 1D array case
1603	!!
1604	!!----------------------------------------------------------------------
1605	INTEGER, INTENT(in ) :: kdim ! ???
1606	INTEGER, INTENT(inout), DIMENSION (kdim) :: ktab ! ???
1607	!!
1608	INTEGER :: ierror
1609	INTEGER, DIMENSION (kdim) :: iwork
1610	!!----------------------------------------------------------------------
1611	!
1612	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1613	!
1614	ktab(:) = iwork(:)
1615	!
1616	END SUBROUTINE mppsum_a_int
1617
1618
1619	SUBROUTINE mppsum_int( ktab )
1620	!!----------------------------------------------------------------------
1621	!! * routine mppsum_int *
1622	!!
1623	!! ** Purpose : Global integer sum
1624	!!
1625	!!----------------------------------------------------------------------
1626	INTEGER, INTENT(inout) :: ktab
1627	!!
1628	INTEGER :: ierror, iwork
1629	!!----------------------------------------------------------------------
1630	!
1631	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1632	!
1633	ktab = iwork
1634	!
1635	END SUBROUTINE mppsum_int
1636
1637
1638	SUBROUTINE mppmax_a_real( ptab, kdim, kcom )
1639	!!----------------------------------------------------------------------
1640	!! * routine mppmax_a_real *
1641	!!
1642	!! ** Purpose : Maximum
1643	!!
1644	!!----------------------------------------------------------------------
1645	INTEGER , INTENT(in ) :: kdim
1646	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1647	INTEGER , INTENT(in ), OPTIONAL :: kcom
1648	!!
1649	INTEGER :: ierror, localcomm
1650	REAL(wp), DIMENSION(kdim) :: zwork
1651	!!----------------------------------------------------------------------
1652	!
1653	localcomm = mpi_comm_opa
1654	IF( PRESENT(kcom) ) localcomm = kcom
1655	!
1656	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_max, localcomm, ierror )
1657	ptab(:) = zwork(:)
1658	!
1659	END SUBROUTINE mppmax_a_real
1660
1661
1662	SUBROUTINE mppmax_real( ptab, kcom )
1663	!!----------------------------------------------------------------------
1664	!! * routine mppmax_real *
1665	!!
1666	!! ** Purpose : Maximum
1667	!!
1668	!!----------------------------------------------------------------------
1669	REAL(wp), INTENT(inout) :: ptab ! ???
1670	INTEGER , INTENT(in ), OPTIONAL :: kcom ! ???
1671	!!
1672	INTEGER :: ierror, localcomm
1673	REAL(wp) :: zwork
1674	!!----------------------------------------------------------------------
1675	!
1676	localcomm = mpi_comm_opa
1677	IF( PRESENT(kcom) ) localcomm = kcom
1678	!
1679	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_max, localcomm, ierror )
1680	ptab = zwork
1681	!
1682	END SUBROUTINE mppmax_real
1683
1684
1685	SUBROUTINE mppmin_a_real( ptab, kdim, kcom )
1686	!!----------------------------------------------------------------------
1687	!! * routine mppmin_a_real *
1688	!!
1689	!! ** Purpose : Minimum of REAL, array case
1690	!!
1691	!!-----------------------------------------------------------------------
1692	INTEGER , INTENT(in ) :: kdim
1693	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1694	INTEGER , INTENT(in ), OPTIONAL :: kcom
1695	!!
1696	INTEGER :: ierror, localcomm
1697	REAL(wp), DIMENSION(kdim) :: zwork
1698	!!-----------------------------------------------------------------------
1699	!
1700	localcomm = mpi_comm_opa
1701	IF( PRESENT(kcom) ) localcomm = kcom
1702	!
1703	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_min, localcomm, ierror )
1704	ptab(:) = zwork(:)
1705	!
1706	END SUBROUTINE mppmin_a_real
1707
1708
1709	SUBROUTINE mppmin_real( ptab, kcom )
1710	!!----------------------------------------------------------------------
1711	!! * routine mppmin_real *
1712	!!
1713	!! ** Purpose : minimum of REAL, scalar case
1714	!!
1715	!!-----------------------------------------------------------------------
1716	REAL(wp), INTENT(inout) :: ptab !
1717	INTEGER , INTENT(in ), OPTIONAL :: kcom
1718	!!
1719	INTEGER :: ierror
1720	REAL(wp) :: zwork
1721	INTEGER :: localcomm
1722	!!-----------------------------------------------------------------------
1723	!
1724	localcomm = mpi_comm_opa
1725	IF( PRESENT(kcom) ) localcomm = kcom
1726	!
1727	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_min, localcomm, ierror )
1728	ptab = zwork
1729	!
1730	END SUBROUTINE mppmin_real
1731
1732
1733	SUBROUTINE mppsum_a_real( ptab, kdim, kcom )
1734	!!----------------------------------------------------------------------
1735	!! * routine mppsum_a_real *
1736	!!
1737	!! ** Purpose : global sum, REAL ARRAY argument case
1738	!!
1739	!!-----------------------------------------------------------------------
1740	INTEGER , INTENT( in ) :: kdim ! size of ptab
1741	REAL(wp), DIMENSION(kdim), INTENT( inout ) :: ptab ! input array
1742	INTEGER , INTENT( in ), OPTIONAL :: kcom
1743	!!
1744	INTEGER :: ierror ! temporary integer
1745	INTEGER :: localcomm
1746	REAL(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1747	!!-----------------------------------------------------------------------
1748	!
1749	localcomm = mpi_comm_opa
1750	IF( PRESENT(kcom) ) localcomm = kcom
1751	!
1752	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_sum, localcomm, ierror )
1753	ptab(:) = zwork(:)
1754	!
1755	END SUBROUTINE mppsum_a_real
1756
1757
1758	SUBROUTINE mppsum_real( ptab, kcom )
1759	!!----------------------------------------------------------------------
1760	!! * routine mppsum_real *
1761	!!
1762	!! ** Purpose : global sum, SCALAR argument case
1763	!!
1764	!!-----------------------------------------------------------------------
1765	REAL(wp), INTENT(inout) :: ptab ! input scalar
1766	INTEGER , INTENT(in ), OPTIONAL :: kcom
1767	!!
1768	INTEGER :: ierror, localcomm
1769	REAL(wp) :: zwork
1770	!!-----------------------------------------------------------------------
1771	!
1772	localcomm = mpi_comm_opa
1773	IF( PRESENT(kcom) ) localcomm = kcom
1774	!
1775	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_sum, localcomm, ierror )
1776	ptab = zwork
1777	!
1778	END SUBROUTINE mppsum_real
1779
1780	SUBROUTINE mppsum_realdd( ytab, kcom )
1781	!!----------------------------------------------------------------------
1782	!! * routine mppsum_realdd *
1783	!!
1784	!! ** Purpose : global sum in Massively Parallel Processing
1785	!! SCALAR argument case for double-double precision
1786	!!
1787	!!-----------------------------------------------------------------------
1788	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
1789	INTEGER , INTENT( in ), OPTIONAL :: kcom
1790
1791	!! * Local variables (MPI version)
1792	INTEGER :: ierror
1793	INTEGER :: localcomm
1794	COMPLEX(wp) :: zwork
1795
1796	localcomm = mpi_comm_opa
1797	IF( PRESENT(kcom) ) localcomm = kcom
1798
1799	! reduce local sums into global sum
1800	CALL MPI_ALLREDUCE (ytab, zwork, 1, MPI_DOUBLE_COMPLEX, &
1801	MPI_SUMDD,localcomm,ierror)
1802	ytab = zwork
1803
1804	END SUBROUTINE mppsum_realdd
1805
1806
1807	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
1808	!!----------------------------------------------------------------------
1809	!! * routine mppsum_a_realdd *
1810	!!
1811	!! ** Purpose : global sum in Massively Parallel Processing
1812	!! COMPLEX ARRAY case for double-double precision
1813	!!
1814	!!-----------------------------------------------------------------------
1815	INTEGER , INTENT( in ) :: kdim ! size of ytab
1816	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
1817	INTEGER , INTENT( in ), OPTIONAL :: kcom
1818
1819	!! * Local variables (MPI version)
1820	INTEGER :: ierror ! temporary integer
1821	INTEGER :: localcomm
1822	COMPLEX(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1823
1824	localcomm = mpi_comm_opa
1825	IF( PRESENT(kcom) ) localcomm = kcom
1826
1827	CALL MPI_ALLREDUCE (ytab, zwork, kdim, MPI_DOUBLE_COMPLEX, &
1828	MPI_SUMDD,localcomm,ierror)
1829	ytab(:) = zwork(:)
1830
1831	END SUBROUTINE mppsum_a_realdd
1832
1833	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki,kj )
1834	!!------------------------------------------------------------------------
1835	!! * routine mpp_minloc *
1836	!!
1837	!! ** Purpose : Compute the global minimum of an array ptab
1838	!! and also give its global position
1839	!!
1840	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1841	!!
1842	!!--------------------------------------------------------------------------
1843	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1844	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1845	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1846	INTEGER , INTENT( out) :: ki, kj ! index of minimum in global frame
1847	!!
1848	INTEGER , DIMENSION(2) :: ilocs
1849	INTEGER :: ierror
1850	REAL(wp) :: zmin ! local minimum
1851	REAL(wp), DIMENSION(2,1) :: zain, zaout
1852	!!-----------------------------------------------------------------------
1853	!
1854	zmin = MINVAL( ptab(:,:) , mask= pmask == 1.e0 )
1855	ilocs = MINLOC( ptab(:,:) , mask= pmask == 1.e0 )
1856	!
1857	ki = ilocs(1) + nimpp - 1
1858	kj = ilocs(2) + njmpp - 1
1859	!
1860	zain(1,:)=zmin
1861	zain(2,:)=ki+10000.*kj
1862	!
1863	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1864	!
1865	pmin = zaout(1,1)
1866	kj = INT(zaout(2,1)/10000.)
1867	ki = INT(zaout(2,1) - 10000.*kj )
1868	!
1869	END SUBROUTINE mpp_minloc2d
1870
1871
1872	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj ,kk)
1873	!!------------------------------------------------------------------------
1874	!! * routine mpp_minloc *
1875	!!
1876	!! ** Purpose : Compute the global minimum of an array ptab
1877	!! and also give its global position
1878	!!
1879	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1880	!!
1881	!!--------------------------------------------------------------------------
1882	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
1883	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
1884	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1885	INTEGER , INTENT( out) :: ki, kj, kk ! index of minimum in global frame
1886	!!
1887	INTEGER :: ierror
1888	REAL(wp) :: zmin ! local minimum
1889	INTEGER , DIMENSION(3) :: ilocs
1890	REAL(wp), DIMENSION(2,1) :: zain, zaout
1891	!!-----------------------------------------------------------------------
1892	!
1893	zmin = MINVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
1894	ilocs = MINLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
1895	!
1896	ki = ilocs(1) + nimpp - 1
1897	kj = ilocs(2) + njmpp - 1
1898	kk = ilocs(3)
1899	!
1900	zain(1,:)=zmin
1901	zain(2,:)=ki+10000.kj+100000000.kk
1902	!
1903	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1904	!
1905	pmin = zaout(1,1)
1906	kk = INT( zaout(2,1) / 100000000. )
1907	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
1908	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
1909	!
1910	END SUBROUTINE mpp_minloc3d
1911
1912
1913	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
1914	!!------------------------------------------------------------------------
1915	!! * routine mpp_maxloc *
1916	!!
1917	!! ** Purpose : Compute the global maximum of an array ptab
1918	!! and also give its global position
1919	!!
1920	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1921	!!
1922	!!--------------------------------------------------------------------------
1923	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1924	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1925	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
1926	INTEGER , INTENT( out) :: ki, kj ! index of maximum in global frame
1927	!!
1928	INTEGER :: ierror
1929	INTEGER, DIMENSION (2) :: ilocs
1930	REAL(wp) :: zmax ! local maximum
1931	REAL(wp), DIMENSION(2,1) :: zain, zaout
1932	!!-----------------------------------------------------------------------
1933	!
1934	zmax = MAXVAL( ptab(:,:) , mask= pmask == 1.e0 )
1935	ilocs = MAXLOC( ptab(:,:) , mask= pmask == 1.e0 )
1936	!
1937	ki = ilocs(1) + nimpp - 1
1938	kj = ilocs(2) + njmpp - 1
1939	!
1940	zain(1,:) = zmax
1941	zain(2,:) = ki + 10000. * kj
1942	!
1943	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
1944	!
1945	pmax = zaout(1,1)
1946	kj = INT( zaout(2,1) / 10000. )
1947	ki = INT( zaout(2,1) - 10000.* kj )
1948	!
1949	END SUBROUTINE mpp_maxloc2d
1950
1951
1952	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
1953	!!------------------------------------------------------------------------
1954	!! * routine mpp_maxloc *
1955	!!
1956	!! ** Purpose : Compute the global maximum of an array ptab
1957	!! and also give its global position
1958	!!
1959	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1960	!!
1961	!!--------------------------------------------------------------------------
1962	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
1963	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
1964	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
1965	INTEGER , INTENT( out) :: ki, kj, kk ! index of maximum in global frame
1966	!!
1967	REAL(wp) :: zmax ! local maximum
1968	REAL(wp), DIMENSION(2,1) :: zain, zaout
1969	INTEGER , DIMENSION(3) :: ilocs
1970	INTEGER :: ierror
1971	!!-----------------------------------------------------------------------
1972	!
1973	zmax = MAXVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
1974	ilocs = MAXLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
1975	!
1976	ki = ilocs(1) + nimpp - 1
1977	kj = ilocs(2) + njmpp - 1
1978	kk = ilocs(3)
1979	!
1980	zain(1,:)=zmax
1981	zain(2,:)=ki+10000.kj+100000000.kk
1982	!
1983	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
1984	!
1985	pmax = zaout(1,1)
1986	kk = INT( zaout(2,1) / 100000000. )
1987	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
1988	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
1989	!
1990	END SUBROUTINE mpp_maxloc3d
1991
1992
1993	SUBROUTINE mppsync()
1994	!!----------------------------------------------------------------------
1995	!! * routine mppsync *
1996	!!
1997	!! ** Purpose : Massively parallel processors, synchroneous
1998	!!
1999	!!-----------------------------------------------------------------------
2000	INTEGER :: ierror
2001	!!-----------------------------------------------------------------------
2002	!
2003	CALL mpi_barrier( mpi_comm_opa, ierror )
2004	!
2005	END SUBROUTINE mppsync
2006
2007
2008	SUBROUTINE mppstop
2009
2010
2011	!!----------------------------------------------------------------------
2012	!! * routine mppstop *
2013	!!
2014	!! ** purpose : Stop massively parallel processors method
2015	!!
2016	!!----------------------------------------------------------------------
2017	INTEGER :: info
2018	!!----------------------------------------------------------------------
2019	!
2020
2021	#if defined key_oasis3 \|\| defined key_oasis3mct
2022	! If we're trying to shut down cleanly then we need to consider the fact
2023	! that this could be part of an MPMD configuration - we don't want to
2024	! leave other components deadlocked.
2025
2026	CALL oasis_abort(nproc,"mppstop","NEMO initiated abort")
2027
2028
2029	#else
2030
2031	CALL mppsync
2032	CALL mpi_finalize( info )
2033	#endif
2034
2035	!
2036	END SUBROUTINE mppstop
2037
2038
2039	SUBROUTINE mpp_comm_free( kcom )
2040	!!----------------------------------------------------------------------
2041	!!----------------------------------------------------------------------
2042	INTEGER, INTENT(in) :: kcom
2043	!!
2044	INTEGER :: ierr
2045	!!----------------------------------------------------------------------
2046	!
2047	CALL MPI_COMM_FREE(kcom, ierr)
2048	!
2049	END SUBROUTINE mpp_comm_free
2050
2051
2052	SUBROUTINE mpp_ini_ice( pindic, kumout )
2053	!!----------------------------------------------------------------------
2054	!! * routine mpp_ini_ice *
2055	!!
2056	!! ** Purpose : Initialize special communicator for ice areas
2057	!! condition together with global variables needed in the ddmpp folding
2058	!!
2059	!! ** Method : - Look for ice processors in ice routines
2060	!! - Put their number in nrank_ice
2061	!! - Create groups for the world processors and the ice processors
2062	!! - Create a communicator for ice processors
2063	!!
2064	!! ** output
2065	!! njmppmax = njmpp for northern procs
2066	!! ndim_rank_ice = number of processors with ice
2067	!! nrank_ice (ndim_rank_ice) = ice processors
2068	!! ngrp_iworld = group ID for the world processors
2069	!! ngrp_ice = group ID for the ice processors
2070	!! ncomm_ice = communicator for the ice procs.
2071	!! n_ice_root = number (in the world) of proc 0 in the ice comm.
2072	!!
2073	!!----------------------------------------------------------------------
2074	INTEGER, INTENT(in) :: pindic
2075	INTEGER, INTENT(in) :: kumout ! ocean.output logical unit
2076	!!
2077	INTEGER :: jjproc
2078	INTEGER :: ii, ierr
2079	INTEGER, ALLOCATABLE, DIMENSION(:) :: kice
2080	INTEGER, ALLOCATABLE, DIMENSION(:) :: zwork
2081	!!----------------------------------------------------------------------
2082	!
2083	! Since this is just an init routine and these arrays are of length jpnij
2084	! then don't use wrk_nemo module - just allocate and deallocate.
2085	ALLOCATE( kice(jpnij), zwork(jpnij), STAT=ierr )
2086	IF( ierr /= 0 ) THEN
2087	WRITE(kumout, cform_err)
2088	WRITE(kumout,*) 'mpp_ini_ice : failed to allocate 2, 1D arrays (jpnij in length)'
2089	CALL mppstop
2090	ENDIF
2091
2092	! Look for how many procs with sea-ice
2093	!
2094	kice = 0
2095	DO jjproc = 1, jpnij
2096	IF( jjproc == narea .AND. pindic .GT. 0 ) kice(jjproc) = 1
2097	END DO
2098	!
2099	zwork = 0
2100	CALL MPI_ALLREDUCE( kice, zwork, jpnij, mpi_integer, mpi_sum, mpi_comm_opa, ierr )
2101	ndim_rank_ice = SUM( zwork )
2102
2103	! Allocate the right size to nrank_north
2104	IF( ALLOCATED ( nrank_ice ) ) DEALLOCATE( nrank_ice )
2105	ALLOCATE( nrank_ice(ndim_rank_ice) )
2106	!
2107	ii = 0
2108	nrank_ice = 0
2109	DO jjproc = 1, jpnij
2110	IF( zwork(jjproc) == 1) THEN
2111	ii = ii + 1
2112	nrank_ice(ii) = jjproc -1
2113	ENDIF
2114	END DO
2115
2116	! Create the world group
2117	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_iworld, ierr )
2118
2119	! Create the ice group from the world group
2120	CALL MPI_GROUP_INCL( ngrp_iworld, ndim_rank_ice, nrank_ice, ngrp_ice, ierr )
2121
2122	! Create the ice communicator , ie the pool of procs with sea-ice
2123	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_ice, ncomm_ice, ierr )
2124
2125	! Find proc number in the world of proc 0 in the north
2126	! The following line seems to be useless, we just comment & keep it as reminder
2127	! CALL MPI_GROUP_TRANSLATE_RANKS(ngrp_ice,1,0,ngrp_iworld,n_ice_root,ierr)
2128	!
2129	CALL MPI_GROUP_FREE(ngrp_ice, ierr)
2130	CALL MPI_GROUP_FREE(ngrp_iworld, ierr)
2131
2132	DEALLOCATE(kice, zwork)
2133	!
2134	END SUBROUTINE mpp_ini_ice
2135
2136
2137	SUBROUTINE mpp_ini_znl( kumout )
2138	!!----------------------------------------------------------------------
2139	!! * routine mpp_ini_znl *
2140	!!
2141	!! ** Purpose : Initialize special communicator for computing zonal sum
2142	!!
2143	!! ** Method : - Look for processors in the same row
2144	!! - Put their number in nrank_znl
2145	!! - Create group for the znl processors
2146	!! - Create a communicator for znl processors
2147	!! - Determine if processor should write znl files
2148	!!
2149	!! ** output
2150	!! ndim_rank_znl = number of processors on the same row
2151	!! ngrp_znl = group ID for the znl processors
2152	!! ncomm_znl = communicator for the ice procs.
2153	!! n_znl_root = number (in the world) of proc 0 in the ice comm.
2154	!!
2155	!!----------------------------------------------------------------------
2156	INTEGER, INTENT(in) :: kumout ! ocean.output logical units
2157	!
2158	INTEGER :: jproc ! dummy loop integer
2159	INTEGER :: ierr, ii ! local integer
2160	INTEGER, ALLOCATABLE, DIMENSION(:) :: kwork
2161	!!----------------------------------------------------------------------
2162	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_world : ', ngrp_world
2163	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_world : ', mpi_comm_world
2164	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_opa : ', mpi_comm_opa
2165	!
2166	ALLOCATE( kwork(jpnij), STAT=ierr )
2167	IF( ierr /= 0 ) THEN
2168	WRITE(kumout, cform_err)
2169	WRITE(kumout,*) 'mpp_ini_znl : failed to allocate 1D array of length jpnij'
2170	CALL mppstop
2171	ENDIF
2172
2173	IF( jpnj == 1 ) THEN
2174	ngrp_znl = ngrp_world
2175	ncomm_znl = mpi_comm_opa
2176	ELSE
2177	!
2178	CALL MPI_ALLGATHER ( njmpp, 1, mpi_integer, kwork, 1, mpi_integer, mpi_comm_opa, ierr )
2179	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - kwork pour njmpp : ', kwork
2180	!-$$ CALL flush(numout)
2181	!
2182	! Count number of processors on the same row
2183	ndim_rank_znl = 0
2184	DO jproc=1,jpnij
2185	IF ( kwork(jproc) == njmpp ) THEN
2186	ndim_rank_znl = ndim_rank_znl + 1
2187	ENDIF
2188	END DO
2189	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ndim_rank_znl : ', ndim_rank_znl
2190	!-$$ CALL flush(numout)
2191	! Allocate the right size to nrank_znl
2192	IF (ALLOCATED (nrank_znl)) DEALLOCATE(nrank_znl)
2193	ALLOCATE(nrank_znl(ndim_rank_znl))
2194	ii = 0
2195	nrank_znl (:) = 0
2196	DO jproc=1,jpnij
2197	IF ( kwork(jproc) == njmpp) THEN
2198	ii = ii + 1
2199	nrank_znl(ii) = jproc -1
2200	ENDIF
2201	END DO
2202	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - nrank_znl : ', nrank_znl
2203	!-$$ CALL flush(numout)
2204
2205	! Create the opa group
2206	CALL MPI_COMM_GROUP(mpi_comm_opa,ngrp_opa,ierr)
2207	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_opa : ', ngrp_opa
2208	!-$$ CALL flush(numout)
2209
2210	! Create the znl group from the opa group
2211	CALL MPI_GROUP_INCL ( ngrp_opa, ndim_rank_znl, nrank_znl, ngrp_znl, ierr )
2212	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_znl ', ngrp_znl
2213	!-$$ CALL flush(numout)
2214
2215	! Create the znl communicator from the opa communicator, ie the pool of procs in the same row
2216	CALL MPI_COMM_CREATE ( mpi_comm_opa, ngrp_znl, ncomm_znl, ierr )
2217	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ncomm_znl ', ncomm_znl
2218	!-$$ CALL flush(numout)
2219	!
2220	END IF
2221
2222	! Determines if processor if the first (starting from i=1) on the row
2223	IF ( jpni == 1 ) THEN
2224	l_znl_root = .TRUE.
2225	ELSE
2226	l_znl_root = .FALSE.
2227	kwork (1) = nimpp
2228	CALL mpp_min ( kwork(1), kcom = ncomm_znl)
2229	IF ( nimpp == kwork(1)) l_znl_root = .TRUE.
2230	END IF
2231
2232	DEALLOCATE(kwork)
2233
2234	END SUBROUTINE mpp_ini_znl
2235
2236
2237	SUBROUTINE mpp_ini_north
2238	!!----------------------------------------------------------------------
2239	!! * routine mpp_ini_north *
2240	!!
2241	!! ** Purpose : Initialize special communicator for north folding
2242	!! condition together with global variables needed in the mpp folding
2243	!!
2244	!! ** Method : - Look for northern processors
2245	!! - Put their number in nrank_north
2246	!! - Create groups for the world processors and the north processors
2247	!! - Create a communicator for northern processors
2248	!!
2249	!! ** output
2250	!! njmppmax = njmpp for northern procs
2251	!! ndim_rank_north = number of processors in the northern line
2252	!! nrank_north (ndim_rank_north) = number of the northern procs.
2253	!! ngrp_world = group ID for the world processors
2254	!! ngrp_north = group ID for the northern processors
2255	!! ncomm_north = communicator for the northern procs.
2256	!! north_root = number (in the world) of proc 0 in the northern comm.
2257	!!
2258	!!----------------------------------------------------------------------
2259	INTEGER :: ierr
2260	INTEGER :: jjproc
2261	INTEGER :: ii, ji
2262	!!----------------------------------------------------------------------
2263	!
2264	njmppmax = MAXVAL( njmppt )
2265	!
2266	! Look for how many procs on the northern boundary
2267	ndim_rank_north = 0
2268	DO jjproc = 1, jpnij
2269	IF( njmppt(jjproc) == njmppmax ) ndim_rank_north = ndim_rank_north + 1
2270	END DO
2271	!
2272	! Allocate the right size to nrank_north
2273	IF (ALLOCATED (nrank_north)) DEALLOCATE(nrank_north)
2274	ALLOCATE( nrank_north(ndim_rank_north) )
2275
2276	! Fill the nrank_north array with proc. number of northern procs.
2277	! Note : the rank start at 0 in MPI
2278	ii = 0
2279	DO ji = 1, jpnij
2280	IF ( njmppt(ji) == njmppmax ) THEN
2281	ii=ii+1
2282	nrank_north(ii)=ji-1
2283	END IF
2284	END DO
2285	!
2286	! create the world group
2287	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_world, ierr )
2288	!
2289	! Create the North group from the world group
2290	CALL MPI_GROUP_INCL( ngrp_world, ndim_rank_north, nrank_north, ngrp_north, ierr )
2291	!
2292	! Create the North communicator , ie the pool of procs in the north group
2293	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_north, ncomm_north, ierr )
2294	!
2295	END SUBROUTINE mpp_ini_north
2296
2297
2298	SUBROUTINE mpp_lbc_north_3d( pt3d, cd_type, psgn )
2299	!!---------------------------------------------------------------------
2300	!! * routine mpp_lbc_north_3d *
2301	!!
2302	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2303	!! in mpp configuration in case of jpn1 > 1
2304	!!
2305	!! ** Method : North fold condition and mpp with more than one proc
2306	!! in i-direction require a specific treatment. We gather
2307	!! the 4 northern lines of the global domain on 1 processor
2308	!! and apply lbc north-fold on this sub array. Then we
2309	!! scatter the north fold array back to the processors.
2310	!!
2311	!!----------------------------------------------------------------------
2312	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pt3d ! 3D array on which the b.c. is applied
2313	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2314	! ! = T , U , V , F or W gridpoints
2315	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2316	!! ! = 1. , the sign is kept
2317	INTEGER :: ji, jj, jr, jk
2318	INTEGER :: ierr, itaille, ildi, ilei, iilb
2319	INTEGER :: ijpj, ijpjm1, ij, iproc
2320	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2321	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2322	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for mpi_isend when avoiding mpi_allgather
2323	! ! Workspace for message transfers avoiding mpi_allgather
2324	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztab
2325	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2326	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: znorthgloio
2327	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztabl, ztabr
2328
2329	INTEGER :: istatus(mpi_status_size)
2330	INTEGER :: iflag
2331	!!----------------------------------------------------------------------
2332	!
2333	ALLOCATE( ztab(jpiglo,4,jpk) , znorthloc(jpi,4,jpk), zfoldwk(jpi,4,jpk), znorthgloio(jpi,4,jpk,jpni) )
2334	ALLOCATE( ztabl(jpi,4,jpk), ztabr(jpi*jpmaxngh, 4, jpk) )
2335
2336	ijpj = 4
2337	ijpjm1 = 3
2338	!
2339	znorthloc(:,:,:) = 0
2340	DO jk = 1, jpk
2341	DO jj = nlcj - ijpj +1, nlcj ! put in xnorthloc the last 4 jlines of pt3d
2342	ij = jj - nlcj + ijpj
2343	znorthloc(:,ij,jk) = pt3d(:,jj,jk)
2344	END DO
2345	END DO
2346	!
2347	! ! Build in procs of ncomm_north the znorthgloio
2348	itaille = jpi * jpk * ijpj
2349
2350	IF ( l_north_nogather ) THEN
2351	!
2352	ztabr(:,:,:) = 0
2353	ztabl(:,:,:) = 0
2354
2355	DO jk = 1, jpk
2356	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2357	ij = jj - nlcj + ijpj
2358	DO ji = nfsloop, nfeloop
2359	ztabl(ji,ij,jk) = pt3d(ji,jj,jk)
2360	END DO
2361	END DO
2362	END DO
2363
2364	DO jr = 1,nsndto
2365	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2366	CALL mppsend( 5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr) )
2367	ENDIF
2368	END DO
2369	DO jr = 1,nsndto
2370	iproc = nfipproc(isendto(jr),jpnj)
2371	IF(iproc .ne. -1) THEN
2372	ilei = nleit (iproc+1)
2373	ildi = nldit (iproc+1)
2374	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2375	ENDIF
2376	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2377	CALL mpprecv(5, zfoldwk, itaille, iproc)
2378	DO jk = 1, jpk
2379	DO jj = 1, ijpj
2380	DO ji = ildi, ilei
2381	ztabr(iilb+ji,jj,jk) = zfoldwk(ji,jj,jk)
2382	END DO
2383	END DO
2384	END DO
2385	ELSE IF (iproc .eq. (narea-1)) THEN
2386	DO jk = 1, jpk
2387	DO jj = 1, ijpj
2388	DO ji = ildi, ilei
2389	ztabr(iilb+ji,jj,jk) = pt3d(ji,nlcj-ijpj+jj,jk)
2390	END DO
2391	END DO
2392	END DO
2393	ENDIF
2394	END DO
2395	IF (l_isend) THEN
2396	DO jr = 1,nsndto
2397	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2398	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2399	ENDIF
2400	END DO
2401	ENDIF
2402	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2403	DO jk = 1, jpk
2404	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2405	ij = jj - nlcj + ijpj
2406	DO ji= 1, nlci
2407	pt3d(ji,jj,jk) = ztabl(ji,ij,jk)
2408	END DO
2409	END DO
2410	END DO
2411	!
2412
2413	ELSE
2414	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2415	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2416	!
2417	ztab(:,:,:) = 0.e0
2418	DO jr = 1, ndim_rank_north ! recover the global north array
2419	iproc = nrank_north(jr) + 1
2420	ildi = nldit (iproc)
2421	ilei = nleit (iproc)
2422	iilb = nimppt(iproc)
2423	DO jk = 1, jpk
2424	DO jj = 1, ijpj
2425	DO ji = ildi, ilei
2426	ztab(ji+iilb-1,jj,jk) = znorthgloio(ji,jj,jk,jr)
2427	END DO
2428	END DO
2429	END DO
2430	END DO
2431	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2432	!
2433	DO jk = 1, jpk
2434	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2435	ij = jj - nlcj + ijpj
2436	DO ji= 1, nlci
2437	pt3d(ji,jj,jk) = ztab(ji+nimpp-1,ij,jk)
2438	END DO
2439	END DO
2440	END DO
2441	!
2442	ENDIF
2443	!
2444	! The ztab array has been either:
2445	! a. Fully populated by the mpi_allgather operation or
2446	! b. Had the active points for this domain and northern neighbours populated
2447	! by peer to peer exchanges
2448	! Either way the array may be folded by lbc_nfd and the result for the span of
2449	! this domain will be identical.
2450	!
2451	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2452	DEALLOCATE( ztabl, ztabr )
2453	!
2454	END SUBROUTINE mpp_lbc_north_3d
2455
2456
2457	SUBROUTINE mpp_lbc_north_2d( pt2d, cd_type, psgn)
2458	!!---------------------------------------------------------------------
2459	!! * routine mpp_lbc_north_2d *
2460	!!
2461	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2462	!! in mpp configuration in case of jpn1 > 1 (for 2d array )
2463	!!
2464	!! ** Method : North fold condition and mpp with more than one proc
2465	!! in i-direction require a specific treatment. We gather
2466	!! the 4 northern lines of the global domain on 1 processor
2467	!! and apply lbc north-fold on this sub array. Then we
2468	!! scatter the north fold array back to the processors.
2469	!!
2470	!!----------------------------------------------------------------------
2471	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the b.c. is applied
2472	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt2d grid-points
2473	! ! = T , U , V , F or W gridpoints
2474	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2475	!! ! = 1. , the sign is kept
2476	INTEGER :: ji, jj, jr
2477	INTEGER :: ierr, itaille, ildi, ilei, iilb
2478	INTEGER :: ijpj, ijpjm1, ij, iproc
2479	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2480	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2481	INTEGER, DIMENSION(MPI_STATUS_SIZE):: ml_stat ! for mpi_isend when avoiding mpi_allgather
2482	! ! Workspace for message transfers avoiding mpi_allgather
2483	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab
2484	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2485	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio
2486	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztabl, ztabr
2487	INTEGER :: istatus(mpi_status_size)
2488	INTEGER :: iflag
2489	!!----------------------------------------------------------------------
2490	!
2491	ALLOCATE( ztab(jpiglo,4), znorthloc(jpi,4), zfoldwk(jpi,4), znorthgloio(jpi,4,jpni) )
2492	ALLOCATE( ztabl(jpi,4), ztabr(jpi*jpmaxngh, 4) )
2493	!
2494	ijpj = 4
2495	ijpjm1 = 3
2496	!
2497	DO jj = nlcj-ijpj+1, nlcj ! put in znorthloc the last 4 jlines of pt2d
2498	ij = jj - nlcj + ijpj
2499	znorthloc(:,ij) = pt2d(:,jj)
2500	END DO
2501
2502	! ! Build in procs of ncomm_north the znorthgloio
2503	itaille = jpi * ijpj
2504	IF ( l_north_nogather ) THEN
2505	!
2506	! Avoid the use of mpi_allgather by exchanging only with the processes already identified
2507	! (in nemo_northcomms) as being involved in this process' northern boundary exchange
2508	!
2509	ztabr(:,:) = 0
2510	ztabl(:,:) = 0
2511
2512	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2513	ij = jj - nlcj + ijpj
2514	DO ji = nfsloop, nfeloop
2515	ztabl(ji,ij) = pt2d(ji,jj)
2516	END DO
2517	END DO
2518
2519	DO jr = 1,nsndto
2520	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2521	CALL mppsend(5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr))
2522	ENDIF
2523	END DO
2524	DO jr = 1,nsndto
2525	iproc = nfipproc(isendto(jr),jpnj)
2526	IF(iproc .ne. -1) THEN
2527	ilei = nleit (iproc+1)
2528	ildi = nldit (iproc+1)
2529	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2530	ENDIF
2531	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2532	CALL mpprecv(5, zfoldwk, itaille, iproc)
2533	DO jj = 1, ijpj
2534	DO ji = ildi, ilei
2535	ztabr(iilb+ji,jj) = zfoldwk(ji,jj)
2536	END DO
2537	END DO
2538	ELSE IF (iproc .eq. (narea-1)) THEN
2539	DO jj = 1, ijpj
2540	DO ji = ildi, ilei
2541	ztabr(iilb+ji,jj) = pt2d(ji,nlcj-ijpj+jj)
2542	END DO
2543	END DO
2544	ENDIF
2545	END DO
2546	IF (l_isend) THEN
2547	DO jr = 1,nsndto
2548	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2549	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2550	ENDIF
2551	END DO
2552	ENDIF
2553	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2554	!
2555	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2556	ij = jj - nlcj + ijpj
2557	DO ji = 1, nlci
2558	pt2d(ji,jj) = ztabl(ji,ij)
2559	END DO
2560	END DO
2561	!
2562	ELSE
2563	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2564	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2565	!
2566	ztab(:,:) = 0.e0
2567	DO jr = 1, ndim_rank_north ! recover the global north array
2568	iproc = nrank_north(jr) + 1
2569	ildi = nldit (iproc)
2570	ilei = nleit (iproc)
2571	iilb = nimppt(iproc)
2572	DO jj = 1, ijpj
2573	DO ji = ildi, ilei
2574	ztab(ji+iilb-1,jj) = znorthgloio(ji,jj,jr)
2575	END DO
2576	END DO
2577	END DO
2578	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2579	!
2580	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2581	ij = jj - nlcj + ijpj
2582	DO ji = 1, nlci
2583	pt2d(ji,jj) = ztab(ji+nimpp-1,ij)
2584	END DO
2585	END DO
2586	!
2587	ENDIF
2588	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2589	DEALLOCATE( ztabl, ztabr )
2590	!
2591	END SUBROUTINE mpp_lbc_north_2d
2592
2593
2594	SUBROUTINE mpp_lbc_north_e( pt2d, cd_type, psgn)
2595	!!---------------------------------------------------------------------
2596	!! * routine mpp_lbc_north_2d *
2597	!!
2598	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2599	!! in mpp configuration in case of jpn1 > 1 and for 2d
2600	!! array with outer extra halo
2601	!!
2602	!! ** Method : North fold condition and mpp with more than one proc
2603	!! in i-direction require a specific treatment. We gather
2604	!! the 4+2*jpr2dj northern lines of the global domain on 1
2605	!! processor and apply lbc north-fold on this sub array.
2606	!! Then we scatter the north fold array back to the processors.
2607	!!
2608	!!----------------------------------------------------------------------
2609	REAL(wp), DIMENSION(1-jpr2di:jpi+jpr2di,1-jpr2dj:jpj+jpr2dj), INTENT(inout) :: pt2d ! 2D array with extra halo
2610	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2611	! ! = T , U , V , F or W -points
2612	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
2613	!! ! north fold, = 1. otherwise
2614	INTEGER :: ji, jj, jr
2615	INTEGER :: ierr, itaille, ildi, ilei, iilb
2616	INTEGER :: ijpj, ij, iproc
2617	!
2618	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
2619	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
2620
2621	!!----------------------------------------------------------------------
2622	!
2623	ALLOCATE( ztab_e(jpiglo,4+2jpr2dj), znorthloc_e(jpi,4+2jpr2dj), znorthgloio_e(jpi,4+2*jpr2dj,jpni) )
2624
2625	!
2626	ijpj=4
2627	ztab_e(:,:) = 0.e0
2628
2629	ij=0
2630	! put in znorthloc_e the last 4 jlines of pt2d
2631	DO jj = nlcj - ijpj + 1 - jpr2dj, nlcj +jpr2dj
2632	ij = ij + 1
2633	DO ji = 1, jpi
2634	znorthloc_e(ji,ij)=pt2d(ji,jj)
2635	END DO
2636	END DO
2637	!
2638	itaille = jpi * ( ijpj + 2 * jpr2dj )
2639	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
2640	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2641	!
2642	DO jr = 1, ndim_rank_north ! recover the global north array
2643	iproc = nrank_north(jr) + 1
2644	ildi = nldit (iproc)
2645	ilei = nleit (iproc)
2646	iilb = nimppt(iproc)
2647	DO jj = 1, ijpj+2*jpr2dj
2648	DO ji = ildi, ilei
2649	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
2650	END DO
2651	END DO
2652	END DO
2653
2654
2655	! 2. North-Fold boundary conditions
2656	! ----------------------------------
2657	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = jpr2dj )
2658
2659	ij = jpr2dj
2660	!! Scatter back to pt2d
2661	DO jj = nlcj - ijpj + 1 , nlcj +jpr2dj
2662	ij = ij +1
2663	DO ji= 1, nlci
2664	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
2665	END DO
2666	END DO
2667	!
2668	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
2669	!
2670	END SUBROUTINE mpp_lbc_north_e
2671
2672	SUBROUTINE mpp_lnk_bdy_3d( ptab, cd_type, psgn, ib_bdy )
2673	!!----------------------------------------------------------------------
2674	!! * routine mpp_lnk_bdy_3d *
2675	!!
2676	!! ** Purpose : Message passing management
2677	!!
2678	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
2679	!! between processors following neighboring subdomains.
2680	!! domain parameters
2681	!! nlci : first dimension of the local subdomain
2682	!! nlcj : second dimension of the local subdomain
2683	!! nbondi_bdy : mark for "east-west local boundary"
2684	!! nbondj_bdy : mark for "north-south local boundary"
2685	!! noea : number for local neighboring processors
2686	!! nowe : number for local neighboring processors
2687	!! noso : number for local neighboring processors
2688	!! nono : number for local neighboring processors
2689	!!
2690	!! ** Action : ptab with update value at its periphery
2691	!!
2692	!!----------------------------------------------------------------------
2693
2694	USE lbcnfd ! north fold
2695
2696	INCLUDE 'mpif.h'
2697
2698	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
2699	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
2700	! ! = T , U , V , F , W points
2701	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
2702	! ! = 1. , the sign is kept
2703	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
2704	INTEGER :: ji, jj, jk, jl ! dummy loop indices
2705	INTEGER :: imigr, iihom, ijhom ! temporary integers
2706	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
2707	REAL(wp) :: zland
2708	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
2709	!
2710	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
2711	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
2712
2713	!!----------------------------------------------------------------------
2714
2715	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
2716	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
2717
2718	zland = 0.e0
2719
2720	! 1. standard boundary treatment
2721	! ------------------------------
2722
2723	! ! East-West boundaries
2724	! !* Cyclic east-west
2725
2726	IF( nbondi == 2) THEN
2727	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
2728	ptab( 1 ,:,:) = ptab(jpim1,:,:)
2729	ptab(jpi,:,:) = ptab( 2 ,:,:)
2730	ELSE
2731	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2732	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2733	ENDIF
2734	ELSEIF(nbondi == -1) THEN
2735	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2736	ELSEIF(nbondi == 1) THEN
2737	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2738	ENDIF !* closed
2739
2740	IF (nbondj == 2 .OR. nbondj == -1) THEN
2741	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
2742	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
2743	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
2744	ENDIF
2745
2746	!
2747
2748	! 2. East and west directions exchange
2749	! ------------------------------------
2750	! we play with the neigbours AND the row number because of the periodicity
2751	!
2752	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
2753	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
2754	iihom = nlci-nreci
2755	DO jl = 1, jpreci
2756	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
2757	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
2758	END DO
2759	END SELECT
2760	!
2761	! ! Migrations
2762	imigr = jpreci * jpj * jpk
2763	!
2764	SELECT CASE ( nbondi_bdy(ib_bdy) )
2765	CASE ( -1 )
2766	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
2767	CASE ( 0 )
2768	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2769	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
2770	CASE ( 1 )
2771	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2772	END SELECT
2773	!
2774	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2775	CASE ( -1 )
2776	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2777	CASE ( 0 )
2778	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2779	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2780	CASE ( 1 )
2781	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2782	END SELECT
2783	!
2784	SELECT CASE ( nbondi_bdy(ib_bdy) )
2785	CASE ( -1 )
2786	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2787	CASE ( 0 )
2788	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2789	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
2790	CASE ( 1 )
2791	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2792	END SELECT
2793	!
2794	! ! Write Dirichlet lateral conditions
2795	iihom = nlci-jpreci
2796	!
2797	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2798	CASE ( -1 )
2799	DO jl = 1, jpreci
2800	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
2801	END DO
2802	CASE ( 0 )
2803	DO jl = 1, jpreci
2804	ptab(jl ,:,:) = zt3we(:,jl,:,2)
2805	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
2806	END DO
2807	CASE ( 1 )
2808	DO jl = 1, jpreci
2809	ptab(jl ,:,:) = zt3we(:,jl,:,2)
2810	END DO
2811	END SELECT
2812
2813
2814	! 3. North and south directions
2815	! -----------------------------
2816	! always closed : we play only with the neigbours
2817	!
2818	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
2819	ijhom = nlcj-nrecj
2820	DO jl = 1, jprecj
2821	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
2822	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
2823	END DO
2824	ENDIF
2825	!
2826	! ! Migrations
2827	imigr = jprecj * jpi * jpk
2828	!
2829	SELECT CASE ( nbondj_bdy(ib_bdy) )
2830	CASE ( -1 )
2831	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
2832	CASE ( 0 )
2833	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
2834	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
2835	CASE ( 1 )
2836	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
2837	END SELECT
2838	!
2839	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
2840	CASE ( -1 )
2841	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
2842	CASE ( 0 )
2843	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
2844	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
2845	CASE ( 1 )
2846	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
2847	END SELECT
2848	!
2849	SELECT CASE ( nbondj_bdy(ib_bdy) )
2850	CASE ( -1 )
2851	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2852	CASE ( 0 )
2853	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2854	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
2855	CASE ( 1 )
2856	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2857	END SELECT
2858	!
2859	! ! Write Dirichlet lateral conditions
2860	ijhom = nlcj-jprecj
2861	!
2862	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
2863	CASE ( -1 )
2864	DO jl = 1, jprecj
2865	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
2866	END DO
2867	CASE ( 0 )
2868	DO jl = 1, jprecj
2869	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
2870	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
2871	END DO
2872	CASE ( 1 )
2873	DO jl = 1, jprecj
2874	ptab(:,jl,:) = zt3sn(:,jl,:,2)
2875	END DO
2876	END SELECT
2877
2878
2879	! 4. north fold treatment
2880	! -----------------------
2881	!
2882	IF( npolj /= 0) THEN
2883	!
2884	SELECT CASE ( jpni )
2885	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
2886	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
2887	END SELECT
2888	!
2889	ENDIF
2890	!
2891	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
2892	!
2893	END SUBROUTINE mpp_lnk_bdy_3d
2894
2895	SUBROUTINE mpp_lnk_bdy_2d( ptab, cd_type, psgn, ib_bdy )
2896	!!----------------------------------------------------------------------
2897	!! * routine mpp_lnk_bdy_2d *
2898	!!
2899	!! ** Purpose : Message passing management
2900	!!
2901	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
2902	!! between processors following neighboring subdomains.
2903	!! domain parameters
2904	!! nlci : first dimension of the local subdomain
2905	!! nlcj : second dimension of the local subdomain
2906	!! nbondi_bdy : mark for "east-west local boundary"
2907	!! nbondj_bdy : mark for "north-south local boundary"
2908	!! noea : number for local neighboring processors
2909	!! nowe : number for local neighboring processors
2910	!! noso : number for local neighboring processors
2911	!! nono : number for local neighboring processors
2912	!!
2913	!! ** Action : ptab with update value at its periphery
2914	!!
2915	!!----------------------------------------------------------------------
2916
2917	USE lbcnfd ! north fold
2918
2919	INCLUDE 'mpif.h'
2920
2921	REAL(wp), DIMENSION(jpi,jpj) , INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
2922	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
2923	! ! = T , U , V , F , W points
2924	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
2925	! ! = 1. , the sign is kept
2926	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
2927	INTEGER :: ji, jj, jl ! dummy loop indices
2928	INTEGER :: imigr, iihom, ijhom ! temporary integers
2929	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
2930	REAL(wp) :: zland
2931	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
2932	!
2933	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
2934	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
2935
2936	!!----------------------------------------------------------------------
2937
2938	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
2939	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
2940
2941	zland = 0.e0
2942
2943	! 1. standard boundary treatment
2944	! ------------------------------
2945
2946	! ! East-West boundaries
2947	! !* Cyclic east-west
2948
2949	IF( nbondi == 2) THEN
2950	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
2951	ptab( 1 ,:) = ptab(jpim1,:)
2952	ptab(jpi,:) = ptab( 2 ,:)
2953	ELSE
2954	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
2955	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
2956	ENDIF
2957	ELSEIF(nbondi == -1) THEN
2958	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
2959	ELSEIF(nbondi == 1) THEN
2960	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
2961	ENDIF !* closed
2962
2963	IF (nbondj == 2 .OR. nbondj == -1) THEN
2964	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj) = zland ! south except F-point
2965	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
2966	ptab(:,nlcj-jprecj+1:jpj) = zland ! north
2967	ENDIF
2968
2969	!
2970
2971	! 2. East and west directions exchange
2972	! ------------------------------------
2973	! we play with the neigbours AND the row number because of the periodicity
2974	!
2975	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
2976	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
2977	iihom = nlci-nreci
2978	DO jl = 1, jpreci
2979	zt2ew(:,jl,1) = ptab(jpreci+jl,:)
2980	zt2we(:,jl,1) = ptab(iihom +jl,:)
2981	END DO
2982	END SELECT
2983	!
2984	! ! Migrations
2985	imigr = jpreci * jpj
2986	!
2987	SELECT CASE ( nbondi_bdy(ib_bdy) )
2988	CASE ( -1 )
2989	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
2990	CASE ( 0 )
2991	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
2992	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
2993	CASE ( 1 )
2994	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
2995	END SELECT
2996	!
2997	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2998	CASE ( -1 )
2999	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3000	CASE ( 0 )
3001	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3002	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3003	CASE ( 1 )
3004	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3005	END SELECT
3006	!
3007	SELECT CASE ( nbondi_bdy(ib_bdy) )
3008	CASE ( -1 )
3009	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3010	CASE ( 0 )
3011	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3012	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3013	CASE ( 1 )
3014	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3015	END SELECT
3016	!
3017	! ! Write Dirichlet lateral conditions
3018	iihom = nlci-jpreci
3019	!
3020	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3021	CASE ( -1 )
3022	DO jl = 1, jpreci
3023	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3024	END DO
3025	CASE ( 0 )
3026	DO jl = 1, jpreci
3027	ptab(jl ,:) = zt2we(:,jl,2)
3028	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3029	END DO
3030	CASE ( 1 )
3031	DO jl = 1, jpreci
3032	ptab(jl ,:) = zt2we(:,jl,2)
3033	END DO
3034	END SELECT
3035
3036
3037	! 3. North and south directions
3038	! -----------------------------
3039	! always closed : we play only with the neigbours
3040	!
3041	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
3042	ijhom = nlcj-nrecj
3043	DO jl = 1, jprecj
3044	zt2sn(:,jl,1) = ptab(:,ijhom +jl)
3045	zt2ns(:,jl,1) = ptab(:,jprecj+jl)
3046	END DO
3047	ENDIF
3048	!
3049	! ! Migrations
3050	imigr = jprecj * jpi
3051	!
3052	SELECT CASE ( nbondj_bdy(ib_bdy) )
3053	CASE ( -1 )
3054	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
3055	CASE ( 0 )
3056	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3057	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
3058	CASE ( 1 )
3059	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3060	END SELECT
3061	!
3062	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3063	CASE ( -1 )
3064	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3065	CASE ( 0 )
3066	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3067	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3068	CASE ( 1 )
3069	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3070	END SELECT
3071	!
3072	SELECT CASE ( nbondj_bdy(ib_bdy) )
3073	CASE ( -1 )
3074	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3075	CASE ( 0 )
3076	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3077	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3078	CASE ( 1 )
3079	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3080	END SELECT
3081	!
3082	! ! Write Dirichlet lateral conditions
3083	ijhom = nlcj-jprecj
3084	!
3085	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3086	CASE ( -1 )
3087	DO jl = 1, jprecj
3088	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3089	END DO
3090	CASE ( 0 )
3091	DO jl = 1, jprecj
3092	ptab(:,jl ) = zt2sn(:,jl,2)
3093	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3094	END DO
3095	CASE ( 1 )
3096	DO jl = 1, jprecj
3097	ptab(:,jl) = zt2sn(:,jl,2)
3098	END DO
3099	END SELECT
3100
3101
3102	! 4. north fold treatment
3103	! -----------------------
3104	!
3105	IF( npolj /= 0) THEN
3106	!
3107	SELECT CASE ( jpni )
3108	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
3109	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
3110	END SELECT
3111	!
3112	ENDIF
3113	!
3114	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
3115	!
3116	END SUBROUTINE mpp_lnk_bdy_2d
3117
3118	SUBROUTINE mpi_init_opa( ldtxt, ksft, code )
3119	!!---------------------------------------------------------------------
3120	!! * routine mpp_init.opa *
3121	!!
3122	!! ** Purpose :: export and attach a MPI buffer for bsend
3123	!!
3124	!! ** Method :: define buffer size in namelist, if 0 no buffer attachment
3125	!! but classical mpi_init
3126	!!
3127	!! History :: 01/11 :: IDRIS initial version for IBM only
3128	!! 08/04 :: R. Benshila, generalisation
3129	!!---------------------------------------------------------------------
3130	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
3131	INTEGER , INTENT(inout) :: ksft
3132	INTEGER , INTENT( out) :: code
3133	INTEGER :: ierr, ji
3134	LOGICAL :: mpi_was_called
3135	!!---------------------------------------------------------------------
3136	!
3137	CALL mpi_initialized( mpi_was_called, code ) ! MPI initialization
3138	IF ( code /= MPI_SUCCESS ) THEN
3139	DO ji = 1, SIZE(ldtxt)
3140	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3141	END DO
3142	WRITE(*, cform_err)
3143	WRITE(, ) ' lib_mpp: Error in routine mpi_initialized'
3144	CALL mpi_abort( mpi_comm_world, code, ierr )
3145	ENDIF
3146	!
3147	IF( .NOT. mpi_was_called ) THEN
3148	CALL mpi_init( code )
3149	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code )
3150	IF ( code /= MPI_SUCCESS ) THEN
3151	DO ji = 1, SIZE(ldtxt)
3152	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3153	END DO
3154	WRITE(*, cform_err)
3155	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
3156	CALL mpi_abort( mpi_comm_world, code, ierr )
3157	ENDIF
3158	ENDIF
3159	!
3160	IF( nn_buffer > 0 ) THEN
3161	WRITE(ldtxt(ksft),*) 'mpi_bsend, buffer allocation of : ', nn_buffer ; ksft = ksft + 1
3162	! Buffer allocation and attachment
3163	ALLOCATE( tampon(nn_buffer), stat = ierr )
3164	IF( ierr /= 0 ) THEN
3165	DO ji = 1, SIZE(ldtxt)
3166	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3167	END DO
3168	WRITE(*, cform_err)
3169	WRITE(, ) ' lib_mpp: Error in ALLOCATE', ierr
3170	CALL mpi_abort( mpi_comm_world, code, ierr )
3171	END IF
3172	CALL mpi_buffer_attach( tampon, nn_buffer, code )
3173	ENDIF
3174	!
3175	END SUBROUTINE mpi_init_opa
3176
3177	SUBROUTINE DDPDD_MPI (ydda, yddb, ilen, itype)
3178	!!---------------------------------------------------------------------
3179	!! Routine DDPDD_MPI: used by reduction operator MPI_SUMDD
3180	!!
3181	!! Modification of original codes written by David H. Bailey
3182	!! This subroutine computes yddb(i) = ydda(i)+yddb(i)
3183	!!---------------------------------------------------------------------
3184	INTEGER, INTENT(in) :: ilen, itype
3185	COMPLEX(wp), DIMENSION(ilen), INTENT(in) :: ydda
3186	COMPLEX(wp), DIMENSION(ilen), INTENT(inout) :: yddb
3187	!
3188	REAL(wp) :: zerr, zt1, zt2 ! local work variables
3189	INTEGER :: ji, ztmp ! local scalar
3190
3191	ztmp = itype ! avoid compilation warning
3192
3193	DO ji=1,ilen
3194	! Compute ydda + yddb using Knuth's trick.
3195	zt1 = real(ydda(ji)) + real(yddb(ji))
3196	zerr = zt1 - real(ydda(ji))
3197	zt2 = ((real(yddb(ji)) - zerr) + (real(ydda(ji)) - (zt1 - zerr))) &
3198	+ aimag(ydda(ji)) + aimag(yddb(ji))
3199
3200	! The result is zt1 + zt2, after normalization.
3201	yddb(ji) = cmplx ( zt1 + zt2, zt2 - ((zt1 + zt2) - zt1),wp )
3202	END DO
3203
3204	END SUBROUTINE DDPDD_MPI
3205
3206	SUBROUTINE mpp_lbc_north_icb( pt2d, cd_type, psgn, pr2dj)
3207	!!---------------------------------------------------------------------
3208	!! * routine mpp_lbc_north_icb *
3209	!!
3210	!! ** Purpose : Ensure proper north fold horizontal bondary condition
3211	!! in mpp configuration in case of jpn1 > 1 and for 2d
3212	!! array with outer extra halo
3213	!!
3214	!! ** Method : North fold condition and mpp with more than one proc
3215	!! in i-direction require a specific treatment. We gather
3216	!! the 4+2*jpr2dj northern lines of the global domain on 1
3217	!! processor and apply lbc north-fold on this sub array.
3218	!! Then we scatter the north fold array back to the processors.
3219	!! This version accounts for an extra halo with icebergs.
3220	!!
3221	!!----------------------------------------------------------------------
3222	REAL(wp), DIMENSION(:,:), INTENT(inout) :: pt2d ! 2D array with extra halo
3223	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
3224	! ! = T , U , V , F or W -points
3225	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
3226	!! ! north fold, = 1. otherwise
3227	INTEGER, OPTIONAL , INTENT(in ) :: pr2dj
3228	INTEGER :: ji, jj, jr
3229	INTEGER :: ierr, itaille, ildi, ilei, iilb
3230	INTEGER :: ijpj, ij, iproc, ipr2dj
3231	!
3232	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
3233	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
3234
3235	!!----------------------------------------------------------------------
3236	!
3237	ijpj=4
3238	IF( PRESENT(pr2dj) ) THEN ! use of additional halos
3239	ipr2dj = pr2dj
3240	ELSE
3241	ipr2dj = 0
3242	ENDIF
3243	ALLOCATE( ztab_e(jpiglo,4+2ipr2dj), znorthloc_e(jpi,4+2ipr2dj), znorthgloio_e(jpi,4+2*ipr2dj,jpni) )
3244
3245	!
3246	ztab_e(:,:) = 0.e0
3247
3248	ij=0
3249	! put in znorthloc_e the last 4 jlines of pt2d
3250	DO jj = nlcj - ijpj + 1 - ipr2dj, nlcj +ipr2dj
3251	ij = ij + 1
3252	DO ji = 1, jpi
3253	znorthloc_e(ji,ij)=pt2d(ji,jj)
3254	END DO
3255	END DO
3256	!
3257	itaille = jpi * ( ijpj + 2 * ipr2dj )
3258	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
3259	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
3260	!
3261	DO jr = 1, ndim_rank_north ! recover the global north array
3262	iproc = nrank_north(jr) + 1
3263	ildi = nldit (iproc)
3264	ilei = nleit (iproc)
3265	iilb = nimppt(iproc)
3266	DO jj = 1, ijpj+2*ipr2dj
3267	DO ji = ildi, ilei
3268	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
3269	END DO
3270	END DO
3271	END DO
3272
3273
3274	! 2. North-Fold boundary conditions
3275	! ----------------------------------
3276	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = ipr2dj )
3277
3278	ij = ipr2dj
3279	!! Scatter back to pt2d
3280	DO jj = nlcj - ijpj + 1 , nlcj +ipr2dj
3281	ij = ij +1
3282	DO ji= 1, nlci
3283	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
3284	END DO
3285	END DO
3286	!
3287	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
3288	!
3289	END SUBROUTINE mpp_lbc_north_icb
3290
3291	SUBROUTINE mpp_lnk_2d_icb( pt2d, cd_type, psgn, jpri, jprj )
3292	!!----------------------------------------------------------------------
3293	!! * routine mpp_lnk_2d_icb *
3294	!!
3295	!! ** Purpose : Message passing manadgement for 2d array (with extra halo and icebergs)
3296	!!
3297	!! ** Method : Use mppsend and mpprecv function for passing mask
3298	!! between processors following neighboring subdomains.
3299	!! domain parameters
3300	!! nlci : first dimension of the local subdomain
3301	!! nlcj : second dimension of the local subdomain
3302	!! jpri : number of rows for extra outer halo
3303	!! jprj : number of columns for extra outer halo
3304	!! nbondi : mark for "east-west local boundary"
3305	!! nbondj : mark for "north-south local boundary"
3306	!! noea : number for local neighboring processors
3307	!! nowe : number for local neighboring processors
3308	!! noso : number for local neighboring processors
3309	!! nono : number for local neighboring processors
3310	!!
3311	!!----------------------------------------------------------------------
3312	INTEGER , INTENT(in ) :: jpri
3313	INTEGER , INTENT(in ) :: jprj
3314	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
3315	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
3316	! ! = T , U , V , F , W and I points
3317	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
3318	!! ! north boundary, = 1. otherwise
3319	INTEGER :: jl ! dummy loop indices
3320	INTEGER :: imigr, iihom, ijhom ! temporary integers
3321	INTEGER :: ipreci, iprecj ! temporary integers
3322	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
3323	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
3324	!!
3325	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
3326	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
3327	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
3328	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
3329	!!----------------------------------------------------------------------
3330
3331	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
3332	iprecj = jprecj + jprj
3333
3334
3335	! 1. standard boundary treatment
3336	! ------------------------------
3337	! Order matters Here !!!!
3338	!
3339	! ! East-West boundaries
3340	! !* Cyclic east-west
3341	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
3342	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
3343	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
3344	!
3345	ELSE !* closed
3346	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
3347	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
3348	ENDIF
3349	!
3350
3351	! north fold treatment
3352	! -----------------------
3353	IF( npolj /= 0 ) THEN
3354	!
3355	SELECT CASE ( jpni )
3356	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
3357	CASE DEFAULT ; CALL mpp_lbc_north_icb( pt2d(1:jpi,1:jpj+jprj) , cd_type, psgn , pr2dj=jprj )
3358	END SELECT
3359	!
3360	ENDIF
3361
3362	! 2. East and west directions exchange
3363	! ------------------------------------
3364	! we play with the neigbours AND the row number because of the periodicity
3365	!
3366	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
3367	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
3368	iihom = nlci-nreci-jpri
3369	DO jl = 1, ipreci
3370	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
3371	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
3372	END DO
3373	END SELECT
3374	!
3375	! ! Migrations
3376	imigr = ipreci * ( jpj + 2*jprj)
3377	!
3378	SELECT CASE ( nbondi )
3379	CASE ( -1 )
3380	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
3381	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3382	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3383	CASE ( 0 )
3384	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3385	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
3386	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3387	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3388	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3389	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3390	CASE ( 1 )
3391	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3392	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3393	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3394	END SELECT
3395	!
3396	! ! Write Dirichlet lateral conditions
3397	iihom = nlci - jpreci
3398	!
3399	SELECT CASE ( nbondi )
3400	CASE ( -1 )
3401	DO jl = 1, ipreci
3402	pt2d(iihom+jl,:) = r2dew(:,jl,2)
3403	END DO
3404	CASE ( 0 )
3405	DO jl = 1, ipreci
3406	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3407	pt2d( iihom+jl,:) = r2dew(:,jl,2)
3408	END DO
3409	CASE ( 1 )
3410	DO jl = 1, ipreci
3411	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3412	END DO
3413	END SELECT
3414
3415
3416	! 3. North and south directions
3417	! -----------------------------
3418	! always closed : we play only with the neigbours
3419	!
3420	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
3421	ijhom = nlcj-nrecj-jprj
3422	DO jl = 1, iprecj
3423	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
3424	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
3425	END DO
3426	ENDIF
3427	!
3428	! ! Migrations
3429	imigr = iprecj * ( jpi + 2*jpri )
3430	!
3431	SELECT CASE ( nbondj )
3432	CASE ( -1 )
3433	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
3434	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3435	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3436	CASE ( 0 )
3437	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3438	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
3439	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3440	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3441	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3442	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3443	CASE ( 1 )
3444	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3445	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3446	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3447	END SELECT
3448	!
3449	! ! Write Dirichlet lateral conditions
3450	ijhom = nlcj - jprecj
3451	!
3452	SELECT CASE ( nbondj )
3453	CASE ( -1 )
3454	DO jl = 1, iprecj
3455	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
3456	END DO
3457	CASE ( 0 )
3458	DO jl = 1, iprecj
3459	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3460	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
3461	END DO
3462	CASE ( 1 )
3463	DO jl = 1, iprecj
3464	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3465	END DO
3466	END SELECT
3467
3468	END SUBROUTINE mpp_lnk_2d_icb
3469	#else
3470	!!----------------------------------------------------------------------
3471	!! Default case: Dummy module share memory computing
3472	!!----------------------------------------------------------------------
3473	USE in_out_manager
3474
3475	INTERFACE mpp_sum
3476	MODULE PROCEDURE mpp_sum_a2s, mpp_sum_as, mpp_sum_ai, mpp_sum_s, mpp_sum_i, mppsum_realdd, mppsum_a_realdd
3477	END INTERFACE
3478	INTERFACE mpp_max
3479	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
3480	END INTERFACE
3481	INTERFACE mpp_min
3482	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
3483	END INTERFACE
3484	INTERFACE mpp_minloc
3485	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
3486	END INTERFACE
3487	INTERFACE mpp_maxloc
3488	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
3489	END INTERFACE
3490
3491	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .FALSE. !: mpp flag
3492	LOGICAL, PUBLIC :: ln_nnogather !: namelist control of northfold comms (needed here in case "key_mpp_mpi" is not used)
3493	INTEGER :: ncomm_ice
3494	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
3495	!!----------------------------------------------------------------------
3496	CONTAINS
3497
3498	INTEGER FUNCTION lib_mpp_alloc(kumout) ! Dummy function
3499	INTEGER, INTENT(in) :: kumout
3500	lib_mpp_alloc = 0
3501	END FUNCTION lib_mpp_alloc
3502
3503	FUNCTION mynode( ldtxt, ldname, kumnam_ref, knumnam_cfg, kumond , kstop, localComm ) RESULT (function_value)
3504	INTEGER, OPTIONAL , INTENT(in ) :: localComm
3505	CHARACTER(len=*),DIMENSION(:) :: ldtxt
3506	CHARACTER(len=*) :: ldname
3507	INTEGER :: kumnam_ref, knumnam_cfg , kumond , kstop
3508	IF( PRESENT( localComm ) ) mpi_comm_opa = localComm
3509	function_value = 0
3510	IF( .FALSE. ) ldtxt(:) = 'never done'
3511	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
3512	END FUNCTION mynode
3513
3514	SUBROUTINE mppsync ! Dummy routine
3515	END SUBROUTINE mppsync
3516
3517	SUBROUTINE mpp_sum_as( parr, kdim, kcom ) ! Dummy routine
3518	REAL , DIMENSION(:) :: parr
3519	INTEGER :: kdim
3520	INTEGER, OPTIONAL :: kcom
3521	WRITE(,) 'mpp_sum_as: You should not have seen this print! error?', kdim, parr(1), kcom
3522	END SUBROUTINE mpp_sum_as
3523
3524	SUBROUTINE mpp_sum_a2s( parr, kdim, kcom ) ! Dummy routine
3525	REAL , DIMENSION(:,:) :: parr
3526	INTEGER :: kdim
3527	INTEGER, OPTIONAL :: kcom
3528	WRITE(,) 'mpp_sum_a2s: You should not have seen this print! error?', kdim, parr(1,1), kcom
3529	END SUBROUTINE mpp_sum_a2s
3530
3531	SUBROUTINE mpp_sum_ai( karr, kdim, kcom ) ! Dummy routine
3532	INTEGER, DIMENSION(:) :: karr
3533	INTEGER :: kdim
3534	INTEGER, OPTIONAL :: kcom
3535	WRITE(,) 'mpp_sum_ai: You should not have seen this print! error?', kdim, karr(1), kcom
3536	END SUBROUTINE mpp_sum_ai
3537
3538	SUBROUTINE mpp_sum_s( psca, kcom ) ! Dummy routine
3539	REAL :: psca
3540	INTEGER, OPTIONAL :: kcom
3541	WRITE(,) 'mpp_sum_s: You should not have seen this print! error?', psca, kcom
3542	END SUBROUTINE mpp_sum_s
3543
3544	SUBROUTINE mpp_sum_i( kint, kcom ) ! Dummy routine
3545	integer :: kint
3546	INTEGER, OPTIONAL :: kcom
3547	WRITE(,) 'mpp_sum_i: You should not have seen this print! error?', kint, kcom
3548	END SUBROUTINE mpp_sum_i
3549
3550	SUBROUTINE mppsum_realdd( ytab, kcom )
3551	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
3552	INTEGER , INTENT( in ), OPTIONAL :: kcom
3553	WRITE(,) 'mppsum_realdd: You should not have seen this print! error?', ytab
3554	END SUBROUTINE mppsum_realdd
3555
3556	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
3557	INTEGER , INTENT( in ) :: kdim ! size of ytab
3558	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
3559	INTEGER , INTENT( in ), OPTIONAL :: kcom
3560	WRITE(,) 'mppsum_a_realdd: You should not have seen this print! error?', kdim, ytab(1), kcom
3561	END SUBROUTINE mppsum_a_realdd
3562
3563	SUBROUTINE mppmax_a_real( parr, kdim, kcom )
3564	REAL , DIMENSION(:) :: parr
3565	INTEGER :: kdim
3566	INTEGER, OPTIONAL :: kcom
3567	WRITE(,) 'mppmax_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3568	END SUBROUTINE mppmax_a_real
3569
3570	SUBROUTINE mppmax_real( psca, kcom )
3571	REAL :: psca
3572	INTEGER, OPTIONAL :: kcom
3573	WRITE(,) 'mppmax_real: You should not have seen this print! error?', psca, kcom
3574	END SUBROUTINE mppmax_real
3575
3576	SUBROUTINE mppmin_a_real( parr, kdim, kcom )
3577	REAL , DIMENSION(:) :: parr
3578	INTEGER :: kdim
3579	INTEGER, OPTIONAL :: kcom
3580	WRITE(,) 'mppmin_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3581	END SUBROUTINE mppmin_a_real
3582
3583	SUBROUTINE mppmin_real( psca, kcom )
3584	REAL :: psca
3585	INTEGER, OPTIONAL :: kcom
3586	WRITE(,) 'mppmin_real: You should not have seen this print! error?', psca, kcom
3587	END SUBROUTINE mppmin_real
3588
3589	SUBROUTINE mppmax_a_int( karr, kdim ,kcom)
3590	INTEGER, DIMENSION(:) :: karr
3591	INTEGER :: kdim
3592	INTEGER, OPTIONAL :: kcom
3593	WRITE(,) 'mppmax_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3594	END SUBROUTINE mppmax_a_int
3595
3596	SUBROUTINE mppmax_int( kint, kcom)
3597	INTEGER :: kint
3598	INTEGER, OPTIONAL :: kcom
3599	WRITE(,) 'mppmax_int: You should not have seen this print! error?', kint, kcom
3600	END SUBROUTINE mppmax_int
3601
3602	SUBROUTINE mppmin_a_int( karr, kdim, kcom )
3603	INTEGER, DIMENSION(:) :: karr
3604	INTEGER :: kdim
3605	INTEGER, OPTIONAL :: kcom
3606	WRITE(,) 'mppmin_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3607	END SUBROUTINE mppmin_a_int
3608
3609	SUBROUTINE mppmin_int( kint, kcom )
3610	INTEGER :: kint
3611	INTEGER, OPTIONAL :: kcom
3612	WRITE(,) 'mppmin_int: You should not have seen this print! error?', kint, kcom
3613	END SUBROUTINE mppmin_int
3614
3615	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki, kj )
3616	REAL :: pmin
3617	REAL , DIMENSION (:,:) :: ptab, pmask
3618	INTEGER :: ki, kj
3619	WRITE(,) 'mpp_minloc2d: You should not have seen this print! error?', pmin, ki, kj, ptab(1,1), pmask(1,1)
3620	END SUBROUTINE mpp_minloc2d
3621
3622	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj, kk )
3623	REAL :: pmin
3624	REAL , DIMENSION (:,:,:) :: ptab, pmask
3625	INTEGER :: ki, kj, kk
3626	WRITE(,) 'mpp_minloc3d: You should not have seen this print! error?', pmin, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3627	END SUBROUTINE mpp_minloc3d
3628
3629	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
3630	REAL :: pmax
3631	REAL , DIMENSION (:,:) :: ptab, pmask
3632	INTEGER :: ki, kj
3633	WRITE(,) 'mpp_maxloc2d: You should not have seen this print! error?', pmax, ki, kj, ptab(1,1), pmask(1,1)
3634	END SUBROUTINE mpp_maxloc2d
3635
3636	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
3637	REAL :: pmax
3638	REAL , DIMENSION (:,:,:) :: ptab, pmask
3639	INTEGER :: ki, kj, kk
3640	WRITE(,) 'mpp_maxloc3d: You should not have seen this print! error?', pmax, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3641	END SUBROUTINE mpp_maxloc3d
3642
3643	SUBROUTINE mppstop
3644	STOP ! non MPP case, just stop the run
3645	END SUBROUTINE mppstop
3646
3647	SUBROUTINE mpp_ini_ice( kcom, knum )
3648	INTEGER :: kcom, knum
3649	WRITE(,) 'mpp_ini_ice: You should not have seen this print! error?', kcom, knum
3650	END SUBROUTINE mpp_ini_ice
3651
3652	SUBROUTINE mpp_ini_znl( knum )
3653	INTEGER :: knum
3654	WRITE(,) 'mpp_ini_znl: You should not have seen this print! error?', knum
3655	END SUBROUTINE mpp_ini_znl
3656
3657	SUBROUTINE mpp_comm_free( kcom )
3658	INTEGER :: kcom
3659	WRITE(,) 'mpp_comm_free: You should not have seen this print! error?', kcom
3660	END SUBROUTINE mpp_comm_free
3661	#endif
3662
3663	!!----------------------------------------------------------------------
3664	!! All cases: ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam routines
3665	!!----------------------------------------------------------------------
3666
3667	SUBROUTINE ctl_stop( cd1, cd2, cd3, cd4, cd5 , &
3668	& cd6, cd7, cd8, cd9, cd10 )
3669	!!----------------------------------------------------------------------
3670	!! * ROUTINE stop_opa *
3671	!!
3672	!! ** Purpose : print in ocean.outpput file a error message and
3673	!! increment the error number (nstop) by one.
3674	!!----------------------------------------------------------------------
3675	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3676	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3677	!!----------------------------------------------------------------------
3678	!
3679	nstop = nstop + 1
3680	IF(lwp) THEN
3681	WRITE(numout,cform_err)
3682	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3683	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3684	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3685	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3686	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3687	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3688	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3689	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3690	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3691	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3692	ENDIF
3693	CALL FLUSH(numout )
3694	IF( numstp /= -1 ) CALL FLUSH(numstp )
3695	IF( numsol /= -1 ) CALL FLUSH(numsol )
3696	IF( numevo_ice /= -1 ) CALL FLUSH(numevo_ice)
3697	!
3698	IF( cd1 == 'STOP' ) THEN
3699	IF(lwp) WRITE(numout,*) 'huge E-R-R-O-R : immediate stop'
3700	CALL mppstop()
3701	ENDIF
3702	!
3703	END SUBROUTINE ctl_stop
3704
3705
3706	SUBROUTINE ctl_warn( cd1, cd2, cd3, cd4, cd5, &
3707	& cd6, cd7, cd8, cd9, cd10 )
3708	!!----------------------------------------------------------------------
3709	!! * ROUTINE stop_warn *
3710	!!
3711	!! ** Purpose : print in ocean.outpput file a error message and
3712	!! increment the warning number (nwarn) by one.
3713	!!----------------------------------------------------------------------
3714	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3715	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3716	!!----------------------------------------------------------------------
3717	!
3718	nwarn = nwarn + 1
3719	IF(lwp) THEN
3720	WRITE(numout,cform_war)
3721	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3722	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3723	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3724	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3725	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3726	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3727	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3728	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3729	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3730	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3731	ENDIF
3732	CALL FLUSH(numout)
3733	!
3734	END SUBROUTINE ctl_warn
3735
3736
3737	SUBROUTINE ctl_opn( knum, cdfile, cdstat, cdform, cdacce, klengh, kout, ldwp, karea )
3738	!!----------------------------------------------------------------------
3739	!! * ROUTINE ctl_opn *
3740	!!
3741	!! ** Purpose : Open file and check if required file is available.
3742	!!
3743	!! ** Method : Fortan open
3744	!!----------------------------------------------------------------------
3745	INTEGER , INTENT( out) :: knum ! logical unit to open
3746	CHARACTER(len=*) , INTENT(in ) :: cdfile ! file name to open
3747	CHARACTER(len=*) , INTENT(in ) :: cdstat ! disposition specifier
3748	CHARACTER(len=*) , INTENT(in ) :: cdform ! formatting specifier
3749	CHARACTER(len=*) , INTENT(in ) :: cdacce ! access specifier
3750	INTEGER , INTENT(in ) :: klengh ! record length
3751	INTEGER , INTENT(in ) :: kout ! number of logical units for write
3752	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
3753	INTEGER, OPTIONAL, INTENT(in ) :: karea ! proc number
3754	!!
3755	CHARACTER(len=80) :: clfile
3756	INTEGER :: iost
3757	!!----------------------------------------------------------------------
3758
3759	! adapt filename
3760	! ----------------
3761	clfile = TRIM(cdfile)
3762	IF( PRESENT( karea ) ) THEN
3763	IF( karea > 1 ) WRITE(clfile, "(a,'_',i4.4)") TRIM(clfile), karea-1
3764	ENDIF
3765	#if defined key_agrif
3766	IF( .NOT. Agrif_Root() ) clfile = TRIM(Agrif_CFixed())//'_'//TRIM(clfile)
3767	knum=Agrif_Get_Unit()
3768	#else
3769	knum=get_unit()
3770	#endif
3771
3772	iost=0
3773	IF( cdacce(1:6) == 'DIRECT' ) THEN
3774	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat, RECL=klengh, ERR=100, IOSTAT=iost )
3775	ELSE
3776	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat , ERR=100, IOSTAT=iost )
3777	ENDIF
3778	IF( iost == 0 ) THEN
3779	IF(ldwp) THEN
3780	WRITE(kout,*) ' file : ', clfile,' open ok'
3781	WRITE(kout,*) ' unit = ', knum
3782	WRITE(kout,*) ' status = ', cdstat
3783	WRITE(kout,*) ' form = ', cdform
3784	WRITE(kout,*) ' access = ', cdacce
3785	WRITE(kout,*)
3786	ENDIF
3787	ENDIF
3788	100 CONTINUE
3789	IF( iost /= 0 ) THEN
3790	IF(ldwp) THEN
3791	WRITE(kout,*)
3792	WRITE(kout,*) ' ===>>>> : bad opening file: ', clfile
3793	WRITE(kout,*) ' ======= === '
3794	WRITE(kout,*) ' unit = ', knum
3795	WRITE(kout,*) ' status = ', cdstat
3796	WRITE(kout,*) ' form = ', cdform
3797	WRITE(kout,*) ' access = ', cdacce
3798	WRITE(kout,*) ' iostat = ', iost
3799	WRITE(kout,*) ' we stop. verify the file '
3800	WRITE(kout,*)
3801	ENDIF
3802	CALL ctl_stop ('STOP', 'NEMO abort ctl_opn bad opening')
3803	ENDIF
3804
3805	END SUBROUTINE ctl_opn
3806
3807	SUBROUTINE ctl_nam ( kios, cdnam, ldwp )
3808	!!----------------------------------------------------------------------
3809	!! * ROUTINE ctl_nam *
3810	!!
3811	!! ** Purpose : Informations when error while reading a namelist
3812	!!
3813	!! ** Method : Fortan open
3814	!!----------------------------------------------------------------------
3815	INTEGER , INTENT(inout) :: kios ! IO status after reading the namelist
3816	CHARACTER(len=*) , INTENT(in ) :: cdnam ! group name of namelist for which error occurs
3817	CHARACTER(len=4) :: clios ! string to convert iostat in character for print
3818	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
3819	!!----------------------------------------------------------------------
3820
3821	!
3822	! ----------------
3823	WRITE (clios, '(I4.0)') kios
3824	IF( kios < 0 ) THEN
3825	CALL ctl_warn( 'W A R N I N G: end of record or file while reading namelist ' &
3826	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
3827	ENDIF
3828
3829	IF( kios > 0 ) THEN
3830	CALL ctl_stop( 'E R R O R : misspelled variable in namelist ' &
3831	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
3832	ENDIF
3833	kios = 0
3834	RETURN
3835
3836	END SUBROUTINE ctl_nam
3837
3838	INTEGER FUNCTION get_unit()
3839	!!----------------------------------------------------------------------
3840	!! * FUNCTION get_unit *
3841	!!
3842	!! ** Purpose : return the index of an unused logical unit
3843	!!----------------------------------------------------------------------
3844	LOGICAL :: llopn
3845	!!----------------------------------------------------------------------
3846	!
3847	get_unit = 15 ! choose a unit that is big enough then it is not already used in NEMO
3848	llopn = .TRUE.
3849	DO WHILE( (get_unit < 998) .AND. llopn )
3850	get_unit = get_unit + 1
3851	INQUIRE( unit = get_unit, opened = llopn )
3852	END DO
3853	IF( (get_unit == 999) .AND. llopn ) THEN
3854	CALL ctl_stop( 'get_unit: All logical units until 999 are used...' )
3855	get_unit = -1
3856	ENDIF
3857	!
3858	END FUNCTION get_unit
3859
3860	!!----------------------------------------------------------------------
3861	END MODULE lib_mpp

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