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lib_mpp.F90 @ 13531

Last change on this file since 13531 was 13531, checked in by timgraham, 4 years ago
Change to mppstop to prevent the model hanging when an error occurs.
File size: 173.8 KB

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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	!! 3.6 ! 2015 (O. Tintó and M. Castrillo - BSC) Added 'mpp_lnk_2d_multiple', 'mpp_lbc_north_2d_multiple', 'mpp_max_multiple'
27	!!----------------------------------------------------------------------
28
29	!!----------------------------------------------------------------------
30	!! ctl_stop : update momentum and tracer Kz from a tke scheme
31	!! ctl_warn : initialization, namelist read, and parameters control
32	!! ctl_opn : Open file and check if required file is available.
33	!! ctl_nam : Prints informations when an error occurs while reading a namelist
34	!! get_unit : give the index of an unused logical unit
35	!!----------------------------------------------------------------------
36	#if defined key_mpp_mpi
37	!!----------------------------------------------------------------------
38	!! 'key_mpp_mpi' MPI massively parallel processing library
39	!!----------------------------------------------------------------------
40	!! lib_mpp_alloc : allocate mpp arrays
41	!! mynode : indentify the processor unit
42	!! mpp_lnk : interface (defined in lbclnk) for message passing of 2d or 3d arrays (mpp_lnk_2d, mpp_lnk_3d)
43	!! mpp_lnk_3d_gather : Message passing manadgement for two 3D arrays
44	!! mpp_lnk_e : interface (defined in lbclnk) for message passing of 2d array with extra halo (mpp_lnk_2d_e)
45	!! mpp_lnk_icb : interface for message passing of 2d arrays with extra halo for icebergs (mpp_lnk_2d_icb)
46	!! mpprecv :
47	!! mppsend : SUBROUTINE mpp_ini_znl
48	!! mppscatter :
49	!! mppgather :
50	!! mpp_min : generic interface for mppmin_int , mppmin_a_int , mppmin_real, mppmin_a_real
51	!! mpp_max : generic interface for mppmax_int , mppmax_a_int , mppmax_real, mppmax_a_real
52	!! mpp_sum : generic interface for mppsum_int , mppsum_a_int , mppsum_real, mppsum_a_real
53	!! mpp_minloc :
54	!! mpp_maxloc :
55	!! mppsync :
56	!! mppstop :
57	!! mpp_ini_north : initialisation of north fold
58	!! mpp_lbc_north : north fold processors gathering
59	!! mpp_lbc_north_e : variant of mpp_lbc_north for extra outer halo
60	!! mpp_lbc_north_icb : variant of mpp_lbc_north for extra outer halo with icebergs
61	!!----------------------------------------------------------------------
62	USE dom_oce ! ocean space and time domain
63	USE lbcnfd ! north fold treatment
64	USE in_out_manager ! I/O manager
65	USE wrk_nemo ! work arrays
66
67	IMPLICIT NONE
68	PRIVATE
69
70	PUBLIC ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam
71	PUBLIC mynode, mppstop, mppsync, mpp_comm_free
72	PUBLIC mpp_ini_north, mpp_lbc_north, mpp_lbc_north_e
73	PUBLIC mpp_min, mpp_max, mpp_sum, mpp_minloc, mpp_maxloc
74	PUBLIC mpp_max_multiple
75	PUBLIC mpp_lnk_3d, mpp_lnk_3d_gather, mpp_lnk_2d, mpp_lnk_2d_e
76	PUBLIC mpp_lnk_2d_9 , mpp_lnk_2d_multiple
77	PUBLIC mppscatter, mppgather
78	PUBLIC mpp_ini_ice, mpp_ini_znl
79	PUBLIC mppsize
80	PUBLIC mppsend, mpprecv ! needed by TAM and ICB routines
81	PUBLIC mpp_lnk_bdy_2d, mpp_lnk_bdy_3d
82	PUBLIC mpp_lbc_north_icb, mpp_lnk_2d_icb
83	PUBLIC mpprank
84
85	TYPE arrayptr
86	REAL , DIMENSION (:,:), POINTER :: pt2d
87	END TYPE arrayptr
88	PUBLIC arrayptr
89
90	!! * Interfaces
91	!! define generic interface for these routine as they are called sometimes
92	!! with scalar arguments instead of array arguments, which causes problems
93	!! for the compilation on AIX system as well as NEC and SGI. Ok on COMPACQ
94	INTERFACE mpp_min
95	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
96	END INTERFACE
97	INTERFACE mpp_max
98	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
99	END INTERFACE
100	INTERFACE mpp_sum
101	MODULE PROCEDURE mppsum_a_int, mppsum_int, mppsum_a_real, mppsum_real, &
102	mppsum_realdd, mppsum_a_realdd
103	END INTERFACE
104	INTERFACE mpp_lbc_north
105	MODULE PROCEDURE mpp_lbc_north_3d, mpp_lbc_north_2d
106	END INTERFACE
107	INTERFACE mpp_minloc
108	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
109	END INTERFACE
110	INTERFACE mpp_maxloc
111	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
112	END INTERFACE
113
114	INTERFACE mpp_max_multiple
115	MODULE PROCEDURE mppmax_real_multiple
116	END INTERFACE
117
118	!! ========================= !!
119	!! MPI variable definition !!
120	!! ========================= !!
121	!$AGRIF_DO_NOT_TREAT
122	INCLUDE 'mpif.h'
123	!$AGRIF_END_DO_NOT_TREAT
124
125	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .TRUE. !: mpp flag
126
127	INTEGER, PARAMETER :: nprocmax = 2**10 ! maximun dimension (required to be a power of 2)
128
129	INTEGER :: mppsize ! number of process
130	INTEGER :: mpprank ! process number [ 0 - size-1 ]
131	!$AGRIF_DO_NOT_TREAT
132	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
133	!$AGRIF_END_DO_NOT_TREAT
134
135	INTEGER :: MPI_SUMDD
136
137	! variables used in case of sea-ice
138	INTEGER, PUBLIC :: ncomm_ice !: communicator made by the processors with sea-ice (public so that it can be freed in limthd)
139	INTEGER :: ngrp_iworld ! group ID for the world processors (for rheology)
140	INTEGER :: ngrp_ice ! group ID for the ice processors (for rheology)
141	INTEGER :: ndim_rank_ice ! number of 'ice' processors
142	INTEGER :: n_ice_root ! number (in the comm_ice) of proc 0 in the ice comm
143	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_ice ! dimension ndim_rank_ice
144
145	! variables used for zonal integration
146	INTEGER, PUBLIC :: ncomm_znl !: communicator made by the processors on the same zonal average
147	LOGICAL, PUBLIC :: l_znl_root ! True on the 'left'most processor on the same row
148	INTEGER :: ngrp_znl ! group ID for the znl processors
149	INTEGER :: ndim_rank_znl ! number of processors on the same zonal average
150	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_znl ! dimension ndim_rank_znl, number of the procs into the same znl domain
151
152	! North fold condition in mpp_mpi with jpni > 1 (PUBLIC for TAM)
153	INTEGER, PUBLIC :: ngrp_world ! group ID for the world processors
154	INTEGER, PUBLIC :: ngrp_opa ! group ID for the opa processors
155	INTEGER, PUBLIC :: ngrp_north ! group ID for the northern processors (to be fold)
156	INTEGER, PUBLIC :: ncomm_north ! communicator made by the processors belonging to ngrp_north
157	INTEGER, PUBLIC :: ndim_rank_north ! number of 'sea' processor in the northern line (can be /= jpni !)
158	INTEGER, PUBLIC :: njmppmax ! value of njmpp for the processors of the northern line
159	INTEGER, PUBLIC :: north_root ! number (in the comm_opa) of proc 0 in the northern comm
160	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE, PUBLIC :: nrank_north ! dimension ndim_rank_north
161
162	! Type of send : standard, buffered, immediate
163	CHARACTER(len=1), PUBLIC :: cn_mpi_send ! type od mpi send/recieve (S=standard, B=bsend, I=isend)
164	LOGICAL, PUBLIC :: l_isend = .FALSE. ! isend use indicator (T if cn_mpi_send='I')
165	INTEGER, PUBLIC :: nn_buffer ! size of the buffer in case of mpi_bsend
166
167	REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: tampon ! buffer in case of bsend
168
169	LOGICAL, PUBLIC :: ln_nnogather ! namelist control of northfold comms
170	LOGICAL, PUBLIC :: l_north_nogather = .FALSE. ! internal control of northfold comms
171	INTEGER, PUBLIC :: ityp
172	!!----------------------------------------------------------------------
173	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
174	!! $Id$
175	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
176	!!----------------------------------------------------------------------
177	CONTAINS
178
179
180	FUNCTION mynode( ldtxt, ldname, kumnam_ref , kumnam_cfg , kumond , kstop, localComm )
181	!!----------------------------------------------------------------------
182	!! * routine mynode *
183	!!
184	!! ** Purpose : Find processor unit
185	!!----------------------------------------------------------------------
186	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
187	CHARACTER(len=*) , INTENT(in ) :: ldname
188	INTEGER , INTENT(in ) :: kumnam_ref ! logical unit for reference namelist
189	INTEGER , INTENT(in ) :: kumnam_cfg ! logical unit for configuration namelist
190	INTEGER , INTENT(inout) :: kumond ! logical unit for namelist output
191	INTEGER , INTENT(inout) :: kstop ! stop indicator
192	INTEGER, OPTIONAL , INTENT(in ) :: localComm
193	!
194	INTEGER :: mynode, ierr, code, ji, ii, ios
195	LOGICAL :: mpi_was_called
196	!
197	NAMELIST/nammpp/ cn_mpi_send, nn_buffer, jpni, jpnj, jpnij, ln_nnogather
198	!!----------------------------------------------------------------------
199	!
200	ii = 1
201	WRITE(ldtxt(ii),*) ; ii = ii + 1
202	WRITE(ldtxt(ii),*) 'mynode : mpi initialisation' ; ii = ii + 1
203	WRITE(ldtxt(ii),*) '~~~~~~ ' ; ii = ii + 1
204	!
205
206	REWIND( kumnam_ref ) ! Namelist nammpp in reference namelist: mpi variables
207	READ ( kumnam_ref, nammpp, IOSTAT = ios, ERR = 901)
208	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in reference namelist', lwp )
209
210	REWIND( kumnam_cfg ) ! Namelist nammpp in configuration namelist: mpi variables
211	READ ( kumnam_cfg, nammpp, IOSTAT = ios, ERR = 902 )
212	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in configuration namelist', lwp )
213
214	! ! control print
215	WRITE(ldtxt(ii),*) ' Namelist nammpp' ; ii = ii + 1
216	WRITE(ldtxt(ii),*) ' mpi send type cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
217	WRITE(ldtxt(ii),*) ' size in bytes of exported buffer nn_buffer = ', nn_buffer ; ii = ii + 1
218
219	#if defined key_agrif
220	IF( .NOT. Agrif_Root() ) THEN
221	jpni = Agrif_Parent(jpni )
222	jpnj = Agrif_Parent(jpnj )
223	jpnij = Agrif_Parent(jpnij)
224	ENDIF
225	#endif
226
227	IF(jpnij < 1)THEN
228	! If jpnij is not specified in namelist then we calculate it - this
229	! means there will be no land cutting out.
230	jpnij = jpni * jpnj
231	END IF
232
233	IF( (jpni < 1) .OR. (jpnj < 1) )THEN
234	WRITE(ldtxt(ii),*) ' jpni, jpnj and jpnij will be calculated automatically'; ii = ii + 1
235	ELSE
236	WRITE(ldtxt(ii),*) ' processor grid extent in i jpni = ',jpni; ii = ii + 1
237	WRITE(ldtxt(ii),*) ' processor grid extent in j jpnj = ',jpnj; ii = ii + 1
238	WRITE(ldtxt(ii),*) ' number of local domains jpnij = ',jpnij; ii = ii +1
239	END IF
240
241	WRITE(ldtxt(ii),*) ' avoid use of mpi_allgather at the north fold ln_nnogather = ', ln_nnogather ; ii = ii + 1
242
243	CALL mpi_initialized ( mpi_was_called, code )
244	IF( code /= MPI_SUCCESS ) THEN
245	DO ji = 1, SIZE(ldtxt)
246	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
247	END DO
248	WRITE(*, cform_err)
249	WRITE(, ) 'lib_mpp: Error in routine mpi_initialized'
250	CALL mpi_abort( mpi_comm_world, code, ierr )
251	ENDIF
252
253	IF( mpi_was_called ) THEN
254	!
255	SELECT CASE ( cn_mpi_send )
256	CASE ( 'S' ) ! Standard mpi send (blocking)
257	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
258	CASE ( 'B' ) ! Buffer mpi send (blocking)
259	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
260	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
261	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
262	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
263	l_isend = .TRUE.
264	CASE DEFAULT
265	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
266	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
267	kstop = kstop + 1
268	END SELECT
269	ELSE IF ( PRESENT(localComm) .and. .not. mpi_was_called ) THEN
270	WRITE(ldtxt(ii),*) ' lib_mpp: You cannot provide a local communicator ' ; ii = ii + 1
271	WRITE(ldtxt(ii),*) ' without calling MPI_Init before ! ' ; ii = ii + 1
272	kstop = kstop + 1
273	ELSE
274	SELECT CASE ( cn_mpi_send )
275	CASE ( 'S' ) ! Standard mpi send (blocking)
276	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
277	CALL mpi_init( ierr )
278	CASE ( 'B' ) ! Buffer mpi send (blocking)
279	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
280	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
281	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
282	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
283	l_isend = .TRUE.
284	CALL mpi_init( ierr )
285	CASE DEFAULT
286	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
287	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
288	kstop = kstop + 1
289	END SELECT
290	!
291	ENDIF
292
293	IF( PRESENT(localComm) ) THEN
294	IF( Agrif_Root() ) THEN
295	mpi_comm_opa = localComm
296	ENDIF
297	ELSE
298	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code)
299	IF( code /= MPI_SUCCESS ) THEN
300	DO ji = 1, SIZE(ldtxt)
301	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
302	END DO
303	WRITE(*, cform_err)
304	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
305	CALL mpi_abort( mpi_comm_world, code, ierr )
306	ENDIF
307	ENDIF
308
309	#if defined key_agrif
310	IF (Agrif_Root()) THEN
311	CALL Agrif_MPI_Init(mpi_comm_opa)
312	ELSE
313	CALL Agrif_MPI_set_grid_comm(mpi_comm_opa)
314	ENDIF
315	#endif
316
317	CALL mpi_comm_rank( mpi_comm_opa, mpprank, ierr )
318	CALL mpi_comm_size( mpi_comm_opa, mppsize, ierr )
319	mynode = mpprank
320
321	IF( mynode == 0 .AND. nprint > 2) THEN
322	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
323	WRITE(kumond, nammpp)
324	ENDIF
325	!
326	CALL MPI_OP_CREATE(DDPDD_MPI, .TRUE., MPI_SUMDD, ierr)
327	!
328	END FUNCTION mynode
329
330	SUBROUTINE mpp_lnk_3d( ptab, cd_type, psgn, cd_mpp, pval )
331	!!----------------------------------------------------------------------
332	!! * routine mpp_lnk_3d *
333	!!
334	!! ** Purpose : Message passing manadgement
335	!!
336	!! ** Method : Use mppsend and mpprecv function for passing mask
337	!! between processors following neighboring subdomains.
338	!! domain parameters
339	!! nlci : first dimension of the local subdomain
340	!! nlcj : second dimension of the local subdomain
341	!! nbondi : mark for "east-west local boundary"
342	!! nbondj : mark for "north-south local boundary"
343	!! noea : number for local neighboring processors
344	!! nowe : number for local neighboring processors
345	!! noso : number for local neighboring processors
346	!! nono : number for local neighboring processors
347	!!
348	!! ** Action : ptab with update value at its periphery
349	!!
350	!!----------------------------------------------------------------------
351	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
352	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
353	! ! = T , U , V , F , W points
354	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
355	! ! = 1. , the sign is kept
356	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
357	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
358	!!
359	INTEGER :: ji, jj, jk, jl ! dummy loop indices
360	INTEGER :: imigr, iihom, ijhom ! temporary integers
361	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
362	REAL(wp) :: zland
363	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
364	!
365	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
366	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
367
368	!!----------------------------------------------------------------------
369
370	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
371	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
372
373	!
374	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
375	ELSE ; zland = 0.e0 ! zero by default
376	ENDIF
377
378	! 1. standard boundary treatment
379	! ------------------------------
380	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
381	!
382	! WARNING ptab is defined only between nld and nle
383	DO jk = 1, jpk
384	DO jj = nlcj+1, jpj ! added line(s) (inner only)
385	ptab(nldi :nlei , jj ,jk) = ptab(nldi:nlei, nlej,jk)
386	ptab(1 :nldi-1, jj ,jk) = ptab(nldi , nlej,jk)
387	ptab(nlei+1:nlci , jj ,jk) = ptab( nlei, nlej,jk)
388	END DO
389	DO ji = nlci+1, jpi ! added column(s) (full)
390	ptab(ji ,nldj :nlej ,jk) = ptab( nlei,nldj:nlej,jk)
391	ptab(ji ,1 :nldj-1,jk) = ptab( nlei,nldj ,jk)
392	ptab(ji ,nlej+1:jpj ,jk) = ptab( nlei, nlej,jk)
393	END DO
394	END DO
395	!
396	ELSE ! standard close or cyclic treatment
397	!
398	! ! East-West boundaries
399	! !* Cyclic east-west
400	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
401	ptab( 1 ,:,:) = ptab(jpim1,:,:)
402	ptab(jpi,:,:) = ptab( 2 ,:,:)
403	ELSE !* closed
404	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
405	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
406	ENDIF
407	! ! North-South boundaries (always closed)
408	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
409	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
410	!
411	ENDIF
412
413	! 2. East and west directions exchange
414	! ------------------------------------
415	! we play with the neigbours AND the row number because of the periodicity
416	!
417	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
418	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
419	iihom = nlci-nreci
420	DO jl = 1, jpreci
421	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
422	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
423	END DO
424	END SELECT
425	!
426	! ! Migrations
427	imigr = jpreci * jpj * jpk
428	!
429	SELECT CASE ( nbondi )
430	CASE ( -1 )
431	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
432	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
433	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
434	CASE ( 0 )
435	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
436	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
437	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
438	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
439	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
440	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
441	CASE ( 1 )
442	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
443	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
444	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
445	END SELECT
446	!
447	! ! Write Dirichlet lateral conditions
448	iihom = nlci-jpreci
449	!
450	SELECT CASE ( nbondi )
451	CASE ( -1 )
452	DO jl = 1, jpreci
453	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
454	END DO
455	CASE ( 0 )
456	DO jl = 1, jpreci
457	ptab(jl ,:,:) = zt3we(:,jl,:,2)
458	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
459	END DO
460	CASE ( 1 )
461	DO jl = 1, jpreci
462	ptab(jl ,:,:) = zt3we(:,jl,:,2)
463	END DO
464	END SELECT
465
466
467	! 3. North and south directions
468	! -----------------------------
469	! always closed : we play only with the neigbours
470	!
471	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
472	ijhom = nlcj-nrecj
473	DO jl = 1, jprecj
474	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
475	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
476	END DO
477	ENDIF
478	!
479	! ! Migrations
480	imigr = jprecj * jpi * jpk
481	!
482	SELECT CASE ( nbondj )
483	CASE ( -1 )
484	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
485	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
486	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
487	CASE ( 0 )
488	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
489	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
490	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
491	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
492	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
493	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
494	CASE ( 1 )
495	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
496	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
497	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
498	END SELECT
499	!
500	! ! Write Dirichlet lateral conditions
501	ijhom = nlcj-jprecj
502	!
503	SELECT CASE ( nbondj )
504	CASE ( -1 )
505	DO jl = 1, jprecj
506	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
507	END DO
508	CASE ( 0 )
509	DO jl = 1, jprecj
510	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
511	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
512	END DO
513	CASE ( 1 )
514	DO jl = 1, jprecj
515	ptab(:,jl,:) = zt3sn(:,jl,:,2)
516	END DO
517	END SELECT
518
519
520	! 4. north fold treatment
521	! -----------------------
522	!
523	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
524	!
525	SELECT CASE ( jpni )
526	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
527	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
528	END SELECT
529	!
530	ENDIF
531	!
532	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
533	!
534	END SUBROUTINE mpp_lnk_3d
535
536	SUBROUTINE mpp_lnk_2d_multiple( pt2d_array , type_array , psgn_array , num_fields , cd_mpp, pval )
537	!!----------------------------------------------------------------------
538	!! * routine mpp_lnk_2d_multiple *
539	!!
540	!! ** Purpose : Message passing management for multiple 2d arrays
541	!!
542	!! ** Method : Use mppsend and mpprecv function for passing mask
543	!! between processors following neighboring subdomains.
544	!! domain parameters
545	!! nlci : first dimension of the local subdomain
546	!! nlcj : second dimension of the local subdomain
547	!! nbondi : mark for "east-west local boundary"
548	!! nbondj : mark for "north-south local boundary"
549	!! noea : number for local neighboring processors
550	!! nowe : number for local neighboring processors
551	!! noso : number for local neighboring processors
552	!! nono : number for local neighboring processors
553	!!
554	!!----------------------------------------------------------------------
555
556	INTEGER :: num_fields
557	TYPE( arrayptr ), DIMENSION(:) :: pt2d_array
558	CHARACTER(len=1), DIMENSION(:), INTENT(in ) :: type_array ! define the nature of ptab array grid-points
559	! ! = T , U , V , F , W and I points
560	REAL(wp) , DIMENSION(:), INTENT(in ) :: psgn_array ! =-1 the sign change across the north fold boundary
561	! ! = 1. , the sign is kept
562	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
563	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
564	!!
565	INTEGER :: ji, jj, jl ! dummy loop indices
566	INTEGER :: ii !!MULTI SEND DUMMY LOOP INDICES
567	INTEGER :: imigr, iihom, ijhom ! temporary integers
568	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
569
570	REAL(wp) :: zland
571	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
572	!
573	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
574	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
575
576	!!----------------------------------------------------------------------
577
578	ALLOCATE( zt2ns(jpi,jprecj,2num_fields), zt2sn(jpi,jprecj,2num_fields), &
579	& zt2ew(jpj,jpreci,2num_fields), zt2we(jpj,jpreci,2num_fields) )
580
581	!
582	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
583	ELSE ; zland = 0.e0 ! zero by default
584	ENDIF
585
586	! 1. standard boundary treatment
587	! ------------------------------
588	!
589	!First Array
590	DO ii = 1 , num_fields
591	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
592	!
593	! WARNING pt2d is defined only between nld and nle
594	DO jj = nlcj+1, jpj ! added line(s) (inner only)
595	pt2d_array(ii)%pt2d(nldi :nlei , jj) = pt2d_array(ii)%pt2d(nldi:nlei, nlej)
596	pt2d_array(ii)%pt2d(1 :nldi-1, jj) = pt2d_array(ii)%pt2d(nldi , nlej)
597	pt2d_array(ii)%pt2d(nlei+1:nlci , jj) = pt2d_array(ii)%pt2d( nlei, nlej)
598	END DO
599	DO ji = nlci+1, jpi ! added column(s) (full)
600	pt2d_array(ii)%pt2d(ji, nldj :nlej ) = pt2d_array(ii)%pt2d(nlei, nldj:nlej)
601	pt2d_array(ii)%pt2d(ji, 1 :nldj-1) = pt2d_array(ii)%pt2d(nlei, nldj )
602	pt2d_array(ii)%pt2d(ji, nlej+1:jpj ) = pt2d_array(ii)%pt2d(nlei, nlej)
603	END DO
604	!
605	ELSE ! standard close or cyclic treatment
606	!
607	! ! East-West boundaries
608	IF( nbondi == 2 .AND. & ! Cyclic east-west
609	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
610	pt2d_array(ii)%pt2d( 1 , : ) = pt2d_array(ii)%pt2d( jpim1, : ) ! west
611	pt2d_array(ii)%pt2d( jpi , : ) = pt2d_array(ii)%pt2d( 2 , : ) ! east
612	ELSE ! closed
613	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d( 1 : jpreci,:) = zland ! south except F-point
614	pt2d_array(ii)%pt2d(nlci-jpreci+1 : jpi ,:) = zland ! north
615	ENDIF
616	! ! North-South boundaries (always closed)
617	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d(:, 1:jprecj ) = zland ! south except F-point
618	pt2d_array(ii)%pt2d(:, nlcj-jprecj+1:jpj ) = zland ! north
619	!
620	ENDIF
621	END DO
622
623	! 2. East and west directions exchange
624	! ------------------------------------
625	! we play with the neigbours AND the row number because of the periodicity
626	!
627	DO ii = 1 , num_fields
628	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
629	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
630	iihom = nlci-nreci
631	DO jl = 1, jpreci
632	zt2ew( : , jl , ii ) = pt2d_array(ii)%pt2d( jpreci+jl , : )
633	zt2we( : , jl , ii ) = pt2d_array(ii)%pt2d( iihom +jl , : )
634	END DO
635	END SELECT
636	END DO
637	!
638	! ! Migrations
639	imigr = jpreci * jpj
640	!
641	SELECT CASE ( nbondi )
642	CASE ( -1 )
643	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req1 )
644	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
645	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
646	CASE ( 0 )
647	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
648	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req2 )
649	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
650	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
651	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
652	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
653	CASE ( 1 )
654	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
655	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
656	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
657	END SELECT
658	!
659	! ! Write Dirichlet lateral conditions
660	iihom = nlci - jpreci
661	!
662
663	DO ii = 1 , num_fields
664	SELECT CASE ( nbondi )
665	CASE ( -1 )
666	DO jl = 1, jpreci
667	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
668	END DO
669	CASE ( 0 )
670	DO jl = 1, jpreci
671	pt2d_array(ii)%pt2d( jl , : ) = zt2we(:,jl,num_fields+ii)
672	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
673	END DO
674	CASE ( 1 )
675	DO jl = 1, jpreci
676	pt2d_array(ii)%pt2d( jl , : )= zt2we(:,jl,num_fields+ii)
677	END DO
678	END SELECT
679	END DO
680
681	! 3. North and south directions
682	! -----------------------------
683	! always closed : we play only with the neigbours
684	!
685	!First Array
686	DO ii = 1 , num_fields
687	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
688	ijhom = nlcj-nrecj
689	DO jl = 1, jprecj
690	zt2sn(:,jl , ii) = pt2d_array(ii)%pt2d( : , ijhom +jl )
691	zt2ns(:,jl , ii) = pt2d_array(ii)%pt2d( : , jprecj+jl )
692	END DO
693	ENDIF
694	END DO
695	!
696	! ! Migrations
697	imigr = jprecj * jpi
698	!
699	SELECT CASE ( nbondj )
700	CASE ( -1 )
701	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req1 )
702	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
703	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
704	CASE ( 0 )
705	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
706	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req2 )
707	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
708	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
709	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
710	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
711	CASE ( 1 )
712	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
713	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
714	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
715	END SELECT
716	!
717	! ! Write Dirichlet lateral conditions
718	ijhom = nlcj - jprecj
719	!
720
721	DO ii = 1 , num_fields
722	!First Array
723	SELECT CASE ( nbondj )
724	CASE ( -1 )
725	DO jl = 1, jprecj
726	pt2d_array(ii)%pt2d( : , ijhom+jl ) = zt2ns( : , jl , num_fields+ii )
727	END DO
728	CASE ( 0 )
729	DO jl = 1, jprecj
730	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii)
731	pt2d_array(ii)%pt2d( : , ijhom + jl ) = zt2ns( : , jl , num_fields + ii )
732	END DO
733	CASE ( 1 )
734	DO jl = 1, jprecj
735	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii )
736	END DO
737	END SELECT
738	END DO
739
740	! 4. north fold treatment
741	! -----------------------
742	!
743	!First Array
744	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
745	!
746	SELECT CASE ( jpni )
747	CASE ( 1 ) ;
748	DO ii = 1 , num_fields
749	CALL lbc_nfd ( pt2d_array(ii)%pt2d( : , : ), type_array(ii) , psgn_array(ii) ) ! only 1 northern proc, no mpp
750	END DO
751	CASE DEFAULT ; CALL mpp_lbc_north_2d_multiple( pt2d_array, type_array, psgn_array, num_fields ) ! for all northern procs.
752	END SELECT
753	!
754	ENDIF
755	!
756
757	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
758	!
759	END SUBROUTINE mpp_lnk_2d_multiple
760
761
762	SUBROUTINE load_array(pt2d,cd_type,psgn,pt2d_array, type_array, psgn_array,num_fields)
763	!!---------------------------------------------------------------------
764	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2d ! Second 2D array on which the boundary condition is applied
765	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
766	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
767	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
768	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
769	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
770	INTEGER , INTENT (inout):: num_fields
771	!!---------------------------------------------------------------------
772	num_fields=num_fields+1
773	pt2d_array(num_fields)%pt2d=>pt2d
774	type_array(num_fields)=cd_type
775	psgn_array(num_fields)=psgn
776	END SUBROUTINE load_array
777
778
779	SUBROUTINE mpp_lnk_2d_9( pt2dA, cd_typeA, psgnA, pt2dB, cd_typeB, psgnB, pt2dC, cd_typeC, psgnC &
780	& , pt2dD, cd_typeD, psgnD, pt2dE, cd_typeE, psgnE, pt2dF, cd_typeF, psgnF &
781	& , pt2dG, cd_typeG, psgnG, pt2dH, cd_typeH, psgnH, pt2dI, cd_typeI, psgnI, cd_mpp, pval)
782	!!---------------------------------------------------------------------
783	! Second 2D array on which the boundary condition is applied
784	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2dA
785	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dB , pt2dC , pt2dD , pt2dE
786	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dF , pt2dG , pt2dH , pt2dI
787	! define the nature of ptab array grid-points
788	CHARACTER(len=1) , INTENT(in ) :: cd_typeA
789	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeB , cd_typeC , cd_typeD , cd_typeE
790	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeF , cd_typeG , cd_typeH , cd_typeI
791	! =-1 the sign change across the north fold boundary
792	REAL(wp) , INTENT(in ) :: psgnA
793	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnB , psgnC , psgnD , psgnE
794	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnF , psgnG , psgnH , psgnI
795	CHARACTER(len=3) , OPTIONAL, INTENT(in ) :: cd_mpp ! fill the overlap area only
796	REAL(wp) , OPTIONAL, INTENT(in ) :: pval ! background value (used at closed boundaries)
797	!!
798	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
799	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
800	! ! = T , U , V , F , W and I points
801	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
802	INTEGER :: num_fields
803	!!---------------------------------------------------------------------
804
805	num_fields = 0
806
807	!! Load the first array
808	CALL load_array(pt2dA,cd_typeA,psgnA,pt2d_array, type_array, psgn_array,num_fields)
809
810	!! Look if more arrays are added
811	IF(PRESENT (psgnB) )CALL load_array(pt2dB,cd_typeB,psgnB,pt2d_array, type_array, psgn_array,num_fields)
812	IF(PRESENT (psgnC) )CALL load_array(pt2dC,cd_typeC,psgnC,pt2d_array, type_array, psgn_array,num_fields)
813	IF(PRESENT (psgnD) )CALL load_array(pt2dD,cd_typeD,psgnD,pt2d_array, type_array, psgn_array,num_fields)
814	IF(PRESENT (psgnE) )CALL load_array(pt2dE,cd_typeE,psgnE,pt2d_array, type_array, psgn_array,num_fields)
815	IF(PRESENT (psgnF) )CALL load_array(pt2dF,cd_typeF,psgnF,pt2d_array, type_array, psgn_array,num_fields)
816	IF(PRESENT (psgnG) )CALL load_array(pt2dG,cd_typeG,psgnG,pt2d_array, type_array, psgn_array,num_fields)
817	IF(PRESENT (psgnH) )CALL load_array(pt2dH,cd_typeH,psgnH,pt2d_array, type_array, psgn_array,num_fields)
818	IF(PRESENT (psgnI) )CALL load_array(pt2dI,cd_typeI,psgnI,pt2d_array, type_array, psgn_array,num_fields)
819
820	CALL mpp_lnk_2d_multiple(pt2d_array,type_array,psgn_array,num_fields,cd_mpp,pval)
821	END SUBROUTINE mpp_lnk_2d_9
822
823
824	SUBROUTINE mpp_lnk_2d( pt2d, cd_type, psgn, cd_mpp, pval )
825	!!----------------------------------------------------------------------
826	!! * routine mpp_lnk_2d *
827	!!
828	!! ** Purpose : Message passing manadgement for 2d array
829	!!
830	!! ** Method : Use mppsend and mpprecv function for passing mask
831	!! between processors following neighboring subdomains.
832	!! domain parameters
833	!! nlci : first dimension of the local subdomain
834	!! nlcj : second dimension of the local subdomain
835	!! nbondi : mark for "east-west local boundary"
836	!! nbondj : mark for "north-south local boundary"
837	!! noea : number for local neighboring processors
838	!! nowe : number for local neighboring processors
839	!! noso : number for local neighboring processors
840	!! nono : number for local neighboring processors
841	!!
842	!!----------------------------------------------------------------------
843	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the boundary condition is applied
844	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
845	! ! = T , U , V , F , W and I points
846	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
847	! ! = 1. , the sign is kept
848	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
849	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
850	!!
851	INTEGER :: ji, jj, jl ! dummy loop indices
852	INTEGER :: imigr, iihom, ijhom ! temporary integers
853	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
854	REAL(wp) :: zland
855	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
856	!
857	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
858	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
859
860	!!----------------------------------------------------------------------
861
862	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
863	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
864
865	!
866	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
867	ELSE ; zland = 0.e0 ! zero by default
868	ENDIF
869
870	! 1. standard boundary treatment
871	! ------------------------------
872	!
873	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
874	!
875	! WARNING pt2d is defined only between nld and nle
876	DO jj = nlcj+1, jpj ! added line(s) (inner only)
877	pt2d(nldi :nlei , jj ) = pt2d(nldi:nlei, nlej)
878	pt2d(1 :nldi-1, jj ) = pt2d(nldi , nlej)
879	pt2d(nlei+1:nlci , jj ) = pt2d( nlei, nlej)
880	END DO
881	DO ji = nlci+1, jpi ! added column(s) (full)
882	pt2d(ji ,nldj :nlej ) = pt2d( nlei,nldj:nlej)
883	pt2d(ji ,1 :nldj-1) = pt2d( nlei,nldj )
884	pt2d(ji ,nlej+1:jpj ) = pt2d( nlei, nlej)
885	END DO
886	!
887	ELSE ! standard close or cyclic treatment
888	!
889	! ! East-West boundaries
890	IF( nbondi == 2 .AND. & ! Cyclic east-west
891	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
892	pt2d( 1 ,:) = pt2d(jpim1,:) ! west
893	pt2d(jpi,:) = pt2d( 2 ,:) ! east
894	ELSE ! closed
895	IF( .NOT. cd_type == 'F' ) pt2d( 1 :jpreci,:) = zland ! south except F-point
896	pt2d(nlci-jpreci+1:jpi ,:) = zland ! north
897	ENDIF
898	! ! North-South boundaries (always closed)
899	IF( .NOT. cd_type == 'F' ) pt2d(:, 1 :jprecj) = zland !south except F-point
900	pt2d(:,nlcj-jprecj+1:jpj ) = zland ! north
901	!
902	ENDIF
903
904	! 2. East and west directions exchange
905	! ------------------------------------
906	! we play with the neigbours AND the row number because of the periodicity
907	!
908	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
909	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
910	iihom = nlci-nreci
911	DO jl = 1, jpreci
912	zt2ew(:,jl,1) = pt2d(jpreci+jl,:)
913	zt2we(:,jl,1) = pt2d(iihom +jl,:)
914	END DO
915	END SELECT
916	!
917	! ! Migrations
918	imigr = jpreci * jpj
919	!
920	SELECT CASE ( nbondi )
921	CASE ( -1 )
922	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
923	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
924	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
925	CASE ( 0 )
926	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
927	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
928	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
929	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
930	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
931	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
932	CASE ( 1 )
933	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
934	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
935	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
936	END SELECT
937	!
938	! ! Write Dirichlet lateral conditions
939	iihom = nlci - jpreci
940	!
941	SELECT CASE ( nbondi )
942	CASE ( -1 )
943	DO jl = 1, jpreci
944	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
945	END DO
946	CASE ( 0 )
947	DO jl = 1, jpreci
948	pt2d(jl ,:) = zt2we(:,jl,2)
949	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
950	END DO
951	CASE ( 1 )
952	DO jl = 1, jpreci
953	pt2d(jl ,:) = zt2we(:,jl,2)
954	END DO
955	END SELECT
956
957
958	! 3. North and south directions
959	! -----------------------------
960	! always closed : we play only with the neigbours
961	!
962	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
963	ijhom = nlcj-nrecj
964	DO jl = 1, jprecj
965	zt2sn(:,jl,1) = pt2d(:,ijhom +jl)
966	zt2ns(:,jl,1) = pt2d(:,jprecj+jl)
967	END DO
968	ENDIF
969	!
970	! ! Migrations
971	imigr = jprecj * jpi
972	!
973	SELECT CASE ( nbondj )
974	CASE ( -1 )
975	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
976	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
977	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
978	CASE ( 0 )
979	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
980	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
981	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
982	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
983	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
984	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
985	CASE ( 1 )
986	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
987	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
988	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
989	END SELECT
990	!
991	! ! Write Dirichlet lateral conditions
992	ijhom = nlcj - jprecj
993	!
994	SELECT CASE ( nbondj )
995	CASE ( -1 )
996	DO jl = 1, jprecj
997	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
998	END DO
999	CASE ( 0 )
1000	DO jl = 1, jprecj
1001	pt2d(:,jl ) = zt2sn(:,jl,2)
1002	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
1003	END DO
1004	CASE ( 1 )
1005	DO jl = 1, jprecj
1006	pt2d(:,jl ) = zt2sn(:,jl,2)
1007	END DO
1008	END SELECT
1009
1010
1011	! 4. north fold treatment
1012	! -----------------------
1013	!
1014	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
1015	!
1016	SELECT CASE ( jpni )
1017	CASE ( 1 ) ; CALL lbc_nfd ( pt2d, cd_type, psgn ) ! only 1 northern proc, no mpp
1018	CASE DEFAULT ; CALL mpp_lbc_north( pt2d, cd_type, psgn ) ! for all northern procs.
1019	END SELECT
1020	!
1021	ENDIF
1022	!
1023	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
1024	!
1025	END SUBROUTINE mpp_lnk_2d
1026
1027
1028	SUBROUTINE mpp_lnk_3d_gather( ptab1, cd_type1, ptab2, cd_type2, psgn )
1029	!!----------------------------------------------------------------------
1030	!! * routine mpp_lnk_3d_gather *
1031	!!
1032	!! ** Purpose : Message passing manadgement for two 3D arrays
1033	!!
1034	!! ** Method : Use mppsend and mpprecv function for passing mask
1035	!! between processors following neighboring subdomains.
1036	!! domain parameters
1037	!! nlci : first dimension of the local subdomain
1038	!! nlcj : second dimension of the local subdomain
1039	!! nbondi : mark for "east-west local boundary"
1040	!! nbondj : mark for "north-south local boundary"
1041	!! noea : number for local neighboring processors
1042	!! nowe : number for local neighboring processors
1043	!! noso : number for local neighboring processors
1044	!! nono : number for local neighboring processors
1045	!!
1046	!! ** Action : ptab1 and ptab2 with update value at its periphery
1047	!!
1048	!!----------------------------------------------------------------------
1049	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab1 ! first and second 3D array on which
1050	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab2 ! the boundary condition is applied
1051	CHARACTER(len=1) , INTENT(in ) :: cd_type1 ! nature of ptab1 and ptab2 arrays
1052	CHARACTER(len=1) , INTENT(in ) :: cd_type2 ! i.e. grid-points = T , U , V , F or W points
1053	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
1054	!! ! = 1. , the sign is kept
1055	INTEGER :: jl ! dummy loop indices
1056	INTEGER :: imigr, iihom, ijhom ! temporary integers
1057	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1058	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1059	!
1060	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ns, zt4sn ! 2 x 3d for north-south & south-north
1061	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ew, zt4we ! 2 x 3d for east-west & west-east
1062
1063	!!----------------------------------------------------------------------
1064	ALLOCATE( zt4ns(jpi,jprecj,jpk,2,2), zt4sn(jpi,jprecj,jpk,2,2) , &
1065	& zt4ew(jpj,jpreci,jpk,2,2), zt4we(jpj,jpreci,jpk,2,2) )
1066
1067
1068	! 1. standard boundary treatment
1069	! ------------------------------
1070	! ! East-West boundaries
1071	! !* Cyclic east-west
1072	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1073	ptab1( 1 ,:,:) = ptab1(jpim1,:,:)
1074	ptab1(jpi,:,:) = ptab1( 2 ,:,:)
1075	ptab2( 1 ,:,:) = ptab2(jpim1,:,:)
1076	ptab2(jpi,:,:) = ptab2( 2 ,:,:)
1077	ELSE !* closed
1078	IF( .NOT. cd_type1 == 'F' ) ptab1( 1 :jpreci,:,:) = 0.e0 ! south except at F-point
1079	IF( .NOT. cd_type2 == 'F' ) ptab2( 1 :jpreci,:,:) = 0.e0
1080	ptab1(nlci-jpreci+1:jpi ,:,:) = 0.e0 ! north
1081	ptab2(nlci-jpreci+1:jpi ,:,:) = 0.e0
1082	ENDIF
1083
1084
1085	! ! North-South boundaries
1086	IF( .NOT. cd_type1 == 'F' ) ptab1(:, 1 :jprecj,:) = 0.e0 ! south except at F-point
1087	IF( .NOT. cd_type2 == 'F' ) ptab2(:, 1 :jprecj,:) = 0.e0
1088	ptab1(:,nlcj-jprecj+1:jpj ,:) = 0.e0 ! north
1089	ptab2(:,nlcj-jprecj+1:jpj ,:) = 0.e0
1090
1091
1092	! 2. East and west directions exchange
1093	! ------------------------------------
1094	! we play with the neigbours AND the row number because of the periodicity
1095	!
1096	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1097	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1098	iihom = nlci-nreci
1099	DO jl = 1, jpreci
1100	zt4ew(:,jl,:,1,1) = ptab1(jpreci+jl,:,:)
1101	zt4we(:,jl,:,1,1) = ptab1(iihom +jl,:,:)
1102	zt4ew(:,jl,:,2,1) = ptab2(jpreci+jl,:,:)
1103	zt4we(:,jl,:,2,1) = ptab2(iihom +jl,:,:)
1104	END DO
1105	END SELECT
1106	!
1107	! ! Migrations
1108	imigr = jpreci * jpj * jpk *2
1109	!
1110	SELECT CASE ( nbondi )
1111	CASE ( -1 )
1112	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req1 )
1113	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1114	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1115	CASE ( 0 )
1116	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1117	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req2 )
1118	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1119	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1120	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1121	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1122	CASE ( 1 )
1123	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1124	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1125	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1126	END SELECT
1127	!
1128	! ! Write Dirichlet lateral conditions
1129	iihom = nlci - jpreci
1130	!
1131	SELECT CASE ( nbondi )
1132	CASE ( -1 )
1133	DO jl = 1, jpreci
1134	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1135	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1136	END DO
1137	CASE ( 0 )
1138	DO jl = 1, jpreci
1139	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1140	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1141	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1142	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1143	END DO
1144	CASE ( 1 )
1145	DO jl = 1, jpreci
1146	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1147	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1148	END DO
1149	END SELECT
1150
1151
1152	! 3. North and south directions
1153	! -----------------------------
1154	! always closed : we play only with the neigbours
1155	!
1156	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1157	ijhom = nlcj - nrecj
1158	DO jl = 1, jprecj
1159	zt4sn(:,jl,:,1,1) = ptab1(:,ijhom +jl,:)
1160	zt4ns(:,jl,:,1,1) = ptab1(:,jprecj+jl,:)
1161	zt4sn(:,jl,:,2,1) = ptab2(:,ijhom +jl,:)
1162	zt4ns(:,jl,:,2,1) = ptab2(:,jprecj+jl,:)
1163	END DO
1164	ENDIF
1165	!
1166	! ! Migrations
1167	imigr = jprecj * jpi * jpk * 2
1168	!
1169	SELECT CASE ( nbondj )
1170	CASE ( -1 )
1171	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req1 )
1172	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1173	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1174	CASE ( 0 )
1175	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1176	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req2 )
1177	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1178	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1179	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1180	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1181	CASE ( 1 )
1182	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1183	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1184	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1185	END SELECT
1186	!
1187	! ! Write Dirichlet lateral conditions
1188	ijhom = nlcj - jprecj
1189	!
1190	SELECT CASE ( nbondj )
1191	CASE ( -1 )
1192	DO jl = 1, jprecj
1193	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1194	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1195	END DO
1196	CASE ( 0 )
1197	DO jl = 1, jprecj
1198	ptab1(:,jl ,:) = zt4sn(:,jl,:,1,2)
1199	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1200	ptab2(:,jl ,:) = zt4sn(:,jl,:,2,2)
1201	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1202	END DO
1203	CASE ( 1 )
1204	DO jl = 1, jprecj
1205	ptab1(:,jl,:) = zt4sn(:,jl,:,1,2)
1206	ptab2(:,jl,:) = zt4sn(:,jl,:,2,2)
1207	END DO
1208	END SELECT
1209
1210
1211	! 4. north fold treatment
1212	! -----------------------
1213	IF( npolj /= 0 ) THEN
1214	!
1215	SELECT CASE ( jpni )
1216	CASE ( 1 )
1217	CALL lbc_nfd ( ptab1, cd_type1, psgn ) ! only for northern procs.
1218	CALL lbc_nfd ( ptab2, cd_type2, psgn )
1219	CASE DEFAULT
1220	CALL mpp_lbc_north( ptab1, cd_type1, psgn ) ! for all northern procs.
1221	CALL mpp_lbc_north (ptab2, cd_type2, psgn)
1222	END SELECT
1223	!
1224	ENDIF
1225	!
1226	DEALLOCATE( zt4ns, zt4sn, zt4ew, zt4we )
1227	!
1228	END SUBROUTINE mpp_lnk_3d_gather
1229
1230
1231	SUBROUTINE mpp_lnk_2d_e( pt2d, cd_type, psgn, jpri, jprj )
1232	!!----------------------------------------------------------------------
1233	!! * routine mpp_lnk_2d_e *
1234	!!
1235	!! ** Purpose : Message passing manadgement for 2d array (with halo)
1236	!!
1237	!! ** Method : Use mppsend and mpprecv function for passing mask
1238	!! between processors following neighboring subdomains.
1239	!! domain parameters
1240	!! nlci : first dimension of the local subdomain
1241	!! nlcj : second dimension of the local subdomain
1242	!! jpri : number of rows for extra outer halo
1243	!! jprj : number of columns for extra outer halo
1244	!! nbondi : mark for "east-west local boundary"
1245	!! nbondj : mark for "north-south local boundary"
1246	!! noea : number for local neighboring processors
1247	!! nowe : number for local neighboring processors
1248	!! noso : number for local neighboring processors
1249	!! nono : number for local neighboring processors
1250	!!
1251	!!----------------------------------------------------------------------
1252	INTEGER , INTENT(in ) :: jpri
1253	INTEGER , INTENT(in ) :: jprj
1254	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
1255	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
1256	! ! = T , U , V , F , W and I points
1257	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
1258	!! ! north boundary, = 1. otherwise
1259	INTEGER :: jl ! dummy loop indices
1260	INTEGER :: imigr, iihom, ijhom ! temporary integers
1261	INTEGER :: ipreci, iprecj ! temporary integers
1262	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1263	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1264	!!
1265	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
1266	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
1267	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
1268	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
1269	!!----------------------------------------------------------------------
1270
1271	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
1272	iprecj = jprecj + jprj
1273
1274
1275	! 1. standard boundary treatment
1276	! ------------------------------
1277	! Order matters Here !!!!
1278	!
1279	! !* North-South boundaries (always colsed)
1280	IF( .NOT. cd_type == 'F' ) pt2d(:, 1-jprj : jprecj ) = 0.e0 ! south except at F-point
1281	pt2d(:,nlcj-jprecj+1:jpj+jprj) = 0.e0 ! north
1282
1283	! ! East-West boundaries
1284	! !* Cyclic east-west
1285	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1286	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
1287	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
1288	!
1289	ELSE !* closed
1290	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
1291	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
1292	ENDIF
1293	!
1294
1295	! north fold treatment
1296	! -----------------------
1297	IF( npolj /= 0 ) THEN
1298	!
1299	SELECT CASE ( jpni )
1300	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
1301	CASE DEFAULT ; CALL mpp_lbc_north_e( pt2d , cd_type, psgn )
1302	END SELECT
1303	!
1304	ENDIF
1305
1306	! 2. East and west directions exchange
1307	! ------------------------------------
1308	! we play with the neigbours AND the row number because of the periodicity
1309	!
1310	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1311	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1312	iihom = nlci-nreci-jpri
1313	DO jl = 1, ipreci
1314	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
1315	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
1316	END DO
1317	END SELECT
1318	!
1319	! ! Migrations
1320	imigr = ipreci * ( jpj + 2*jprj)
1321	!
1322	SELECT CASE ( nbondi )
1323	CASE ( -1 )
1324	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
1325	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1326	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1327	CASE ( 0 )
1328	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1329	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
1330	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1331	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1332	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1333	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1334	CASE ( 1 )
1335	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1336	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1337	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1338	END SELECT
1339	!
1340	! ! Write Dirichlet lateral conditions
1341	iihom = nlci - jpreci
1342	!
1343	SELECT CASE ( nbondi )
1344	CASE ( -1 )
1345	DO jl = 1, ipreci
1346	pt2d(iihom+jl,:) = r2dew(:,jl,2)
1347	END DO
1348	CASE ( 0 )
1349	DO jl = 1, ipreci
1350	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1351	pt2d( iihom+jl,:) = r2dew(:,jl,2)
1352	END DO
1353	CASE ( 1 )
1354	DO jl = 1, ipreci
1355	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1356	END DO
1357	END SELECT
1358
1359
1360	! 3. North and south directions
1361	! -----------------------------
1362	! always closed : we play only with the neigbours
1363	!
1364	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1365	ijhom = nlcj-nrecj-jprj
1366	DO jl = 1, iprecj
1367	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
1368	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
1369	END DO
1370	ENDIF
1371	!
1372	! ! Migrations
1373	imigr = iprecj * ( jpi + 2*jpri )
1374	!
1375	SELECT CASE ( nbondj )
1376	CASE ( -1 )
1377	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
1378	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1379	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1380	CASE ( 0 )
1381	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1382	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
1383	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1384	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1385	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1386	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1387	CASE ( 1 )
1388	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1389	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1390	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1391	END SELECT
1392	!
1393	! ! Write Dirichlet lateral conditions
1394	ijhom = nlcj - jprecj
1395	!
1396	SELECT CASE ( nbondj )
1397	CASE ( -1 )
1398	DO jl = 1, iprecj
1399	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
1400	END DO
1401	CASE ( 0 )
1402	DO jl = 1, iprecj
1403	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1404	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
1405	END DO
1406	CASE ( 1 )
1407	DO jl = 1, iprecj
1408	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1409	END DO
1410	END SELECT
1411
1412	END SUBROUTINE mpp_lnk_2d_e
1413
1414
1415	SUBROUTINE mppsend( ktyp, pmess, kbytes, kdest, md_req )
1416	!!----------------------------------------------------------------------
1417	!! * routine mppsend *
1418	!!
1419	!! ** Purpose : Send messag passing array
1420	!!
1421	!!----------------------------------------------------------------------
1422	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1423	INTEGER , INTENT(in ) :: kbytes ! size of the array pmess
1424	INTEGER , INTENT(in ) :: kdest ! receive process number
1425	INTEGER , INTENT(in ) :: ktyp ! tag of the message
1426	INTEGER , INTENT(in ) :: md_req ! argument for isend
1427	!!
1428	INTEGER :: iflag
1429	!!----------------------------------------------------------------------
1430	!
1431	SELECT CASE ( cn_mpi_send )
1432	CASE ( 'S' ) ! Standard mpi send (blocking)
1433	CALL mpi_send ( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1434	CASE ( 'B' ) ! Buffer mpi send (blocking)
1435	CALL mpi_bsend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1436	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
1437	! be carefull, one more argument here : the mpi request identifier..
1438	CALL mpi_isend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa, md_req, iflag )
1439	END SELECT
1440	!
1441	END SUBROUTINE mppsend
1442
1443
1444	SUBROUTINE mpprecv( ktyp, pmess, kbytes, ksource )
1445	!!----------------------------------------------------------------------
1446	!! * routine mpprecv *
1447	!!
1448	!! ** Purpose : Receive messag passing array
1449	!!
1450	!!----------------------------------------------------------------------
1451	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1452	INTEGER , INTENT(in ) :: kbytes ! suze of the array pmess
1453	INTEGER , INTENT(in ) :: ktyp ! Tag of the recevied message
1454	INTEGER, OPTIONAL, INTENT(in) :: ksource ! source process number
1455	!!
1456	INTEGER :: istatus(mpi_status_size)
1457	INTEGER :: iflag
1458	INTEGER :: use_source
1459	!!----------------------------------------------------------------------
1460	!
1461
1462	! If a specific process number has been passed to the receive call,
1463	! use that one. Default is to use mpi_any_source
1464	use_source=mpi_any_source
1465	if(present(ksource)) then
1466	use_source=ksource
1467	end if
1468
1469	CALL mpi_recv( pmess, kbytes, mpi_double_precision, use_source, ktyp, mpi_comm_opa, istatus, iflag )
1470	!
1471	END SUBROUTINE mpprecv
1472
1473
1474	SUBROUTINE mppgather( ptab, kp, pio )
1475	!!----------------------------------------------------------------------
1476	!! * routine mppgather *
1477	!!
1478	!! ** Purpose : Transfert between a local subdomain array and a work
1479	!! array which is distributed following the vertical level.
1480	!!
1481	!!----------------------------------------------------------------------
1482	REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: ptab ! subdomain input array
1483	INTEGER , INTENT(in ) :: kp ! record length
1484	REAL(wp), DIMENSION(jpi,jpj,jpnij), INTENT( out) :: pio ! subdomain input array
1485	!!
1486	INTEGER :: itaille, ierror ! temporary integer
1487	!!---------------------------------------------------------------------
1488	!
1489	itaille = jpi * jpj
1490	CALL mpi_gather( ptab, itaille, mpi_double_precision, pio, itaille , &
1491	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1492	!
1493	END SUBROUTINE mppgather
1494
1495
1496	SUBROUTINE mppscatter( pio, kp, ptab )
1497	!!----------------------------------------------------------------------
1498	!! * routine mppscatter *
1499	!!
1500	!! ** Purpose : Transfert between awork array which is distributed
1501	!! following the vertical level and the local subdomain array.
1502	!!
1503	!!----------------------------------------------------------------------
1504	REAL(wp), DIMENSION(jpi,jpj,jpnij) :: pio ! output array
1505	INTEGER :: kp ! Tag (not used with MPI
1506	REAL(wp), DIMENSION(jpi,jpj) :: ptab ! subdomain array input
1507	!!
1508	INTEGER :: itaille, ierror ! temporary integer
1509	!!---------------------------------------------------------------------
1510	!
1511	itaille=jpi*jpj
1512	!
1513	CALL mpi_scatter( pio, itaille, mpi_double_precision, ptab, itaille , &
1514	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1515	!
1516	END SUBROUTINE mppscatter
1517
1518
1519	SUBROUTINE mppmax_a_int( ktab, kdim, kcom )
1520	!!----------------------------------------------------------------------
1521	!! * routine mppmax_a_int *
1522	!!
1523	!! ** Purpose : Find maximum value in an integer layout array
1524	!!
1525	!!----------------------------------------------------------------------
1526	INTEGER , INTENT(in ) :: kdim ! size of array
1527	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1528	INTEGER , INTENT(in ), OPTIONAL :: kcom !
1529	!!
1530	INTEGER :: ierror, localcomm ! temporary integer
1531	INTEGER, DIMENSION(kdim) :: iwork
1532	!!----------------------------------------------------------------------
1533	!
1534	localcomm = mpi_comm_opa
1535	IF( PRESENT(kcom) ) localcomm = kcom
1536	!
1537	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_max, localcomm, ierror )
1538	!
1539	ktab(:) = iwork(:)
1540	!
1541	END SUBROUTINE mppmax_a_int
1542
1543
1544	SUBROUTINE mppmax_int( ktab, kcom )
1545	!!----------------------------------------------------------------------
1546	!! * routine mppmax_int *
1547	!!
1548	!! ** Purpose : Find maximum value in an integer layout array
1549	!!
1550	!!----------------------------------------------------------------------
1551	INTEGER, INTENT(inout) :: ktab ! ???
1552	INTEGER, INTENT(in ), OPTIONAL :: kcom ! ???
1553	!!
1554	INTEGER :: ierror, iwork, localcomm ! temporary integer
1555	!!----------------------------------------------------------------------
1556	!
1557	localcomm = mpi_comm_opa
1558	IF( PRESENT(kcom) ) localcomm = kcom
1559	!
1560	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_max, localcomm, ierror)
1561	!
1562	ktab = iwork
1563	!
1564	END SUBROUTINE mppmax_int
1565
1566
1567	SUBROUTINE mppmin_a_int( ktab, kdim, kcom )
1568	!!----------------------------------------------------------------------
1569	!! * routine mppmin_a_int *
1570	!!
1571	!! ** Purpose : Find minimum value in an integer layout array
1572	!!
1573	!!----------------------------------------------------------------------
1574	INTEGER , INTENT( in ) :: kdim ! size of array
1575	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1576	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1577	!!
1578	INTEGER :: ierror, localcomm ! temporary integer
1579	INTEGER, DIMENSION(kdim) :: iwork
1580	!!----------------------------------------------------------------------
1581	!
1582	localcomm = mpi_comm_opa
1583	IF( PRESENT(kcom) ) localcomm = kcom
1584	!
1585	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_min, localcomm, ierror )
1586	!
1587	ktab(:) = iwork(:)
1588	!
1589	END SUBROUTINE mppmin_a_int
1590
1591
1592	SUBROUTINE mppmin_int( ktab, kcom )
1593	!!----------------------------------------------------------------------
1594	!! * routine mppmin_int *
1595	!!
1596	!! ** Purpose : Find minimum value in an integer layout array
1597	!!
1598	!!----------------------------------------------------------------------
1599	INTEGER, INTENT(inout) :: ktab ! ???
1600	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1601	!!
1602	INTEGER :: ierror, iwork, localcomm
1603	!!----------------------------------------------------------------------
1604	!
1605	localcomm = mpi_comm_opa
1606	IF( PRESENT(kcom) ) localcomm = kcom
1607	!
1608	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_min, localcomm, ierror )
1609	!
1610	ktab = iwork
1611	!
1612	END SUBROUTINE mppmin_int
1613
1614
1615	SUBROUTINE mppsum_a_int( ktab, kdim )
1616	!!----------------------------------------------------------------------
1617	!! * routine mppsum_a_int *
1618	!!
1619	!! ** Purpose : Global integer sum, 1D array case
1620	!!
1621	!!----------------------------------------------------------------------
1622	INTEGER, INTENT(in ) :: kdim ! ???
1623	INTEGER, INTENT(inout), DIMENSION (kdim) :: ktab ! ???
1624	!!
1625	INTEGER :: ierror
1626	INTEGER, DIMENSION (kdim) :: iwork
1627	!!----------------------------------------------------------------------
1628	!
1629	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1630	!
1631	ktab(:) = iwork(:)
1632	!
1633	END SUBROUTINE mppsum_a_int
1634
1635
1636	SUBROUTINE mppsum_int( ktab )
1637	!!----------------------------------------------------------------------
1638	!! * routine mppsum_int *
1639	!!
1640	!! ** Purpose : Global integer sum
1641	!!
1642	!!----------------------------------------------------------------------
1643	INTEGER, INTENT(inout) :: ktab
1644	!!
1645	INTEGER :: ierror, iwork
1646	!!----------------------------------------------------------------------
1647	!
1648	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1649	!
1650	ktab = iwork
1651	!
1652	END SUBROUTINE mppsum_int
1653
1654
1655	SUBROUTINE mppmax_a_real( ptab, kdim, kcom )
1656	!!----------------------------------------------------------------------
1657	!! * routine mppmax_a_real *
1658	!!
1659	!! ** Purpose : Maximum
1660	!!
1661	!!----------------------------------------------------------------------
1662	INTEGER , INTENT(in ) :: kdim
1663	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1664	INTEGER , INTENT(in ), OPTIONAL :: kcom
1665	!!
1666	INTEGER :: ierror, localcomm
1667	REAL(wp), DIMENSION(kdim) :: zwork
1668	!!----------------------------------------------------------------------
1669	!
1670	localcomm = mpi_comm_opa
1671	IF( PRESENT(kcom) ) localcomm = kcom
1672	!
1673	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_max, localcomm, ierror )
1674	ptab(:) = zwork(:)
1675	!
1676	END SUBROUTINE mppmax_a_real
1677
1678
1679	SUBROUTINE mppmax_real( ptab, kcom )
1680	!!----------------------------------------------------------------------
1681	!! * routine mppmax_real *
1682	!!
1683	!! ** Purpose : Maximum
1684	!!
1685	!!----------------------------------------------------------------------
1686	REAL(wp), INTENT(inout) :: ptab ! ???
1687	INTEGER , INTENT(in ), OPTIONAL :: kcom ! ???
1688	!!
1689	INTEGER :: ierror, localcomm
1690	REAL(wp) :: zwork
1691	!!----------------------------------------------------------------------
1692	!
1693	localcomm = mpi_comm_opa
1694	IF( PRESENT(kcom) ) localcomm = kcom
1695	!
1696	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_max, localcomm, ierror )
1697	ptab = zwork
1698	!
1699	END SUBROUTINE mppmax_real
1700
1701	SUBROUTINE mppmax_real_multiple( ptab, NUM , kcom )
1702	!!----------------------------------------------------------------------
1703	!! * routine mppmax_real *
1704	!!
1705	!! ** Purpose : Maximum
1706	!!
1707	!!----------------------------------------------------------------------
1708	REAL(wp), DIMENSION(:) , INTENT(inout) :: ptab ! ???
1709	INTEGER , INTENT(in ) :: NUM
1710	INTEGER , INTENT(in ), OPTIONAL :: kcom ! ???
1711	!!
1712	INTEGER :: ierror, localcomm
1713	REAL(wp) , POINTER , DIMENSION(:) :: zwork
1714	!!----------------------------------------------------------------------
1715	!
1716	CALL wrk_alloc(NUM , zwork)
1717	localcomm = mpi_comm_opa
1718	IF( PRESENT(kcom) ) localcomm = kcom
1719	!
1720	CALL mpi_allreduce( ptab, zwork, NUM, mpi_double_precision, mpi_max, localcomm, ierror )
1721	ptab = zwork
1722	CALL wrk_dealloc(NUM , zwork)
1723	!
1724	END SUBROUTINE mppmax_real_multiple
1725
1726
1727	SUBROUTINE mppmin_a_real( ptab, kdim, kcom )
1728	!!----------------------------------------------------------------------
1729	!! * routine mppmin_a_real *
1730	!!
1731	!! ** Purpose : Minimum of REAL, array case
1732	!!
1733	!!-----------------------------------------------------------------------
1734	INTEGER , INTENT(in ) :: kdim
1735	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1736	INTEGER , INTENT(in ), OPTIONAL :: kcom
1737	!!
1738	INTEGER :: ierror, localcomm
1739	REAL(wp), DIMENSION(kdim) :: zwork
1740	!!-----------------------------------------------------------------------
1741	!
1742	localcomm = mpi_comm_opa
1743	IF( PRESENT(kcom) ) localcomm = kcom
1744	!
1745	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_min, localcomm, ierror )
1746	ptab(:) = zwork(:)
1747	!
1748	END SUBROUTINE mppmin_a_real
1749
1750
1751	SUBROUTINE mppmin_real( ptab, kcom )
1752	!!----------------------------------------------------------------------
1753	!! * routine mppmin_real *
1754	!!
1755	!! ** Purpose : minimum of REAL, scalar case
1756	!!
1757	!!-----------------------------------------------------------------------
1758	REAL(wp), INTENT(inout) :: ptab !
1759	INTEGER , INTENT(in ), OPTIONAL :: kcom
1760	!!
1761	INTEGER :: ierror
1762	REAL(wp) :: zwork
1763	INTEGER :: localcomm
1764	!!-----------------------------------------------------------------------
1765	!
1766	localcomm = mpi_comm_opa
1767	IF( PRESENT(kcom) ) localcomm = kcom
1768	!
1769	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_min, localcomm, ierror )
1770	ptab = zwork
1771	!
1772	END SUBROUTINE mppmin_real
1773
1774
1775	SUBROUTINE mppsum_a_real( ptab, kdim, kcom )
1776	!!----------------------------------------------------------------------
1777	!! * routine mppsum_a_real *
1778	!!
1779	!! ** Purpose : global sum, REAL ARRAY argument case
1780	!!
1781	!!-----------------------------------------------------------------------
1782	INTEGER , INTENT( in ) :: kdim ! size of ptab
1783	REAL(wp), DIMENSION(kdim), INTENT( inout ) :: ptab ! input array
1784	INTEGER , INTENT( in ), OPTIONAL :: kcom
1785	!!
1786	INTEGER :: ierror ! temporary integer
1787	INTEGER :: localcomm
1788	REAL(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1789	!!-----------------------------------------------------------------------
1790	!
1791	localcomm = mpi_comm_opa
1792	IF( PRESENT(kcom) ) localcomm = kcom
1793	!
1794	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_sum, localcomm, ierror )
1795	ptab(:) = zwork(:)
1796	!
1797	END SUBROUTINE mppsum_a_real
1798
1799
1800	SUBROUTINE mppsum_real( ptab, kcom )
1801	!!----------------------------------------------------------------------
1802	!! * routine mppsum_real *
1803	!!
1804	!! ** Purpose : global sum, SCALAR argument case
1805	!!
1806	!!-----------------------------------------------------------------------
1807	REAL(wp), INTENT(inout) :: ptab ! input scalar
1808	INTEGER , INTENT(in ), OPTIONAL :: kcom
1809	!!
1810	INTEGER :: ierror, localcomm
1811	REAL(wp) :: zwork
1812	!!-----------------------------------------------------------------------
1813	!
1814	localcomm = mpi_comm_opa
1815	IF( PRESENT(kcom) ) localcomm = kcom
1816	!
1817	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_sum, localcomm, ierror )
1818	ptab = zwork
1819	!
1820	END SUBROUTINE mppsum_real
1821
1822	SUBROUTINE mppsum_realdd( ytab, kcom )
1823	!!----------------------------------------------------------------------
1824	!! * routine mppsum_realdd *
1825	!!
1826	!! ** Purpose : global sum in Massively Parallel Processing
1827	!! SCALAR argument case for double-double precision
1828	!!
1829	!!-----------------------------------------------------------------------
1830	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
1831	INTEGER , INTENT( in ), OPTIONAL :: kcom
1832
1833	!! * Local variables (MPI version)
1834	INTEGER :: ierror
1835	INTEGER :: localcomm
1836	COMPLEX(wp) :: zwork
1837
1838	localcomm = mpi_comm_opa
1839	IF( PRESENT(kcom) ) localcomm = kcom
1840
1841	! reduce local sums into global sum
1842	CALL MPI_ALLREDUCE (ytab, zwork, 1, MPI_DOUBLE_COMPLEX, &
1843	MPI_SUMDD,localcomm,ierror)
1844	ytab = zwork
1845
1846	END SUBROUTINE mppsum_realdd
1847
1848
1849	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
1850	!!----------------------------------------------------------------------
1851	!! * routine mppsum_a_realdd *
1852	!!
1853	!! ** Purpose : global sum in Massively Parallel Processing
1854	!! COMPLEX ARRAY case for double-double precision
1855	!!
1856	!!-----------------------------------------------------------------------
1857	INTEGER , INTENT( in ) :: kdim ! size of ytab
1858	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
1859	INTEGER , INTENT( in ), OPTIONAL :: kcom
1860
1861	!! * Local variables (MPI version)
1862	INTEGER :: ierror ! temporary integer
1863	INTEGER :: localcomm
1864	COMPLEX(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1865
1866	localcomm = mpi_comm_opa
1867	IF( PRESENT(kcom) ) localcomm = kcom
1868
1869	CALL MPI_ALLREDUCE (ytab, zwork, kdim, MPI_DOUBLE_COMPLEX, &
1870	MPI_SUMDD,localcomm,ierror)
1871	ytab(:) = zwork(:)
1872
1873	END SUBROUTINE mppsum_a_realdd
1874
1875	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki,kj )
1876	!!------------------------------------------------------------------------
1877	!! * routine mpp_minloc *
1878	!!
1879	!! ** Purpose : Compute the global minimum of an array ptab
1880	!! and also give its global position
1881	!!
1882	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1883	!!
1884	!!--------------------------------------------------------------------------
1885	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1886	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1887	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1888	INTEGER , INTENT( out) :: ki, kj ! index of minimum in global frame
1889	!!
1890	INTEGER , DIMENSION(2) :: ilocs
1891	INTEGER :: ierror
1892	REAL(wp) :: zmin ! local minimum
1893	REAL(wp), DIMENSION(2,1) :: zain, zaout
1894	!!-----------------------------------------------------------------------
1895	!
1896	zmin = MINVAL( ptab(:,:) , mask= pmask == 1.e0 )
1897	ilocs = MINLOC( ptab(:,:) , mask= pmask == 1.e0 )
1898	!
1899	ki = ilocs(1) + nimpp - 1
1900	kj = ilocs(2) + njmpp - 1
1901	!
1902	zain(1,:)=zmin
1903	zain(2,:)=ki+10000.*kj
1904	!
1905	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1906	!
1907	pmin = zaout(1,1)
1908	kj = INT(zaout(2,1)/10000.)
1909	ki = INT(zaout(2,1) - 10000.*kj )
1910	!
1911	END SUBROUTINE mpp_minloc2d
1912
1913
1914	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj ,kk)
1915	!!------------------------------------------------------------------------
1916	!! * routine mpp_minloc *
1917	!!
1918	!! ** Purpose : Compute the global minimum of an array ptab
1919	!! and also give its global position
1920	!!
1921	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1922	!!
1923	!!--------------------------------------------------------------------------
1924	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
1925	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
1926	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1927	INTEGER , INTENT( out) :: ki, kj, kk ! index of minimum in global frame
1928	!!
1929	INTEGER :: ierror
1930	REAL(wp) :: zmin ! local minimum
1931	INTEGER , DIMENSION(3) :: ilocs
1932	REAL(wp), DIMENSION(2,1) :: zain, zaout
1933	!!-----------------------------------------------------------------------
1934	!
1935	zmin = MINVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
1936	ilocs = MINLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
1937	!
1938	ki = ilocs(1) + nimpp - 1
1939	kj = ilocs(2) + njmpp - 1
1940	kk = ilocs(3)
1941	!
1942	zain(1,:)=zmin
1943	zain(2,:)=ki+10000.kj+100000000.kk
1944	!
1945	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1946	!
1947	pmin = zaout(1,1)
1948	kk = INT( zaout(2,1) / 100000000. )
1949	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
1950	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
1951	!
1952	END SUBROUTINE mpp_minloc3d
1953
1954
1955	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
1956	!!------------------------------------------------------------------------
1957	!! * routine mpp_maxloc *
1958	!!
1959	!! ** Purpose : Compute the global maximum of an array ptab
1960	!! and also give its global position
1961	!!
1962	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1963	!!
1964	!!--------------------------------------------------------------------------
1965	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1966	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1967	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
1968	INTEGER , INTENT( out) :: ki, kj ! index of maximum in global frame
1969	!!
1970	INTEGER :: ierror
1971	INTEGER, DIMENSION (2) :: ilocs
1972	REAL(wp) :: zmax ! local maximum
1973	REAL(wp), DIMENSION(2,1) :: zain, zaout
1974	!!-----------------------------------------------------------------------
1975	!
1976	zmax = MAXVAL( ptab(:,:) , mask= pmask == 1.e0 )
1977	ilocs = MAXLOC( ptab(:,:) , mask= pmask == 1.e0 )
1978	!
1979	ki = ilocs(1) + nimpp - 1
1980	kj = ilocs(2) + njmpp - 1
1981	!
1982	zain(1,:) = zmax
1983	zain(2,:) = ki + 10000. * kj
1984	!
1985	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
1986	!
1987	pmax = zaout(1,1)
1988	kj = INT( zaout(2,1) / 10000. )
1989	ki = INT( zaout(2,1) - 10000.* kj )
1990	!
1991	END SUBROUTINE mpp_maxloc2d
1992
1993
1994	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
1995	!!------------------------------------------------------------------------
1996	!! * routine mpp_maxloc *
1997	!!
1998	!! ** Purpose : Compute the global maximum of an array ptab
1999	!! and also give its global position
2000	!!
2001	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
2002	!!
2003	!!--------------------------------------------------------------------------
2004	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
2005	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
2006	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
2007	INTEGER , INTENT( out) :: ki, kj, kk ! index of maximum in global frame
2008	!!
2009	REAL(wp) :: zmax ! local maximum
2010	REAL(wp), DIMENSION(2,1) :: zain, zaout
2011	INTEGER , DIMENSION(3) :: ilocs
2012	INTEGER :: ierror
2013	!!-----------------------------------------------------------------------
2014	!
2015	zmax = MAXVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
2016	ilocs = MAXLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
2017	!
2018	ki = ilocs(1) + nimpp - 1
2019	kj = ilocs(2) + njmpp - 1
2020	kk = ilocs(3)
2021	!
2022	zain(1,:)=zmax
2023	zain(2,:)=ki+10000.kj+100000000.kk
2024	!
2025	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
2026	!
2027	pmax = zaout(1,1)
2028	kk = INT( zaout(2,1) / 100000000. )
2029	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
2030	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
2031	!
2032	END SUBROUTINE mpp_maxloc3d
2033
2034
2035	SUBROUTINE mppsync()
2036	!!----------------------------------------------------------------------
2037	!! * routine mppsync *
2038	!!
2039	!! ** Purpose : Massively parallel processors, synchroneous
2040	!!
2041	!!-----------------------------------------------------------------------
2042	INTEGER :: ierror
2043	!!-----------------------------------------------------------------------
2044	!
2045	CALL mpi_barrier( mpi_comm_opa, ierror )
2046	!
2047	END SUBROUTINE mppsync
2048
2049
2050	SUBROUTINE mppstop
2051
2052	#if defined key_oasis3
2053	USE mod_oasis ! coupling routines
2054	#endif
2055
2056	!!----------------------------------------------------------------------
2057	!! * routine mppstop *
2058	!!
2059	!! ** purpose : Stop massively parallel processors method
2060	!!
2061	!!----------------------------------------------------------------------
2062	INTEGER :: info, ierr
2063	!!----------------------------------------------------------------------
2064	!
2065
2066	#if defined key_oasis3
2067	! If we're trying to shut down cleanly then we need to consider the fact
2068	! that this could be part of an MPMD configuration - we don't want to
2069	! leave other components deadlocked.
2070
2071	IF(lwp) CALL mpi_abort( mpi_comm_world, 1, ierr )
2072	!CALL oasis_abort(nproc,"mppstop","NEMO initiated abort")
2073	CALL exit(9)
2074
2075	#else
2076
2077	CALL mppsync
2078	CALL mpi_finalize( info )
2079	#endif
2080
2081	!
2082	END SUBROUTINE mppstop
2083
2084
2085	SUBROUTINE mpp_comm_free( kcom )
2086	!!----------------------------------------------------------------------
2087	!!----------------------------------------------------------------------
2088	INTEGER, INTENT(in) :: kcom
2089	!!
2090	INTEGER :: ierr
2091	!!----------------------------------------------------------------------
2092	!
2093	CALL MPI_COMM_FREE(kcom, ierr)
2094	!
2095	END SUBROUTINE mpp_comm_free
2096
2097
2098	SUBROUTINE mpp_ini_ice( pindic, kumout )
2099	!!----------------------------------------------------------------------
2100	!! * routine mpp_ini_ice *
2101	!!
2102	!! ** Purpose : Initialize special communicator for ice areas
2103	!! condition together with global variables needed in the ddmpp folding
2104	!!
2105	!! ** Method : - Look for ice processors in ice routines
2106	!! - Put their number in nrank_ice
2107	!! - Create groups for the world processors and the ice processors
2108	!! - Create a communicator for ice processors
2109	!!
2110	!! ** output
2111	!! njmppmax = njmpp for northern procs
2112	!! ndim_rank_ice = number of processors with ice
2113	!! nrank_ice (ndim_rank_ice) = ice processors
2114	!! ngrp_iworld = group ID for the world processors
2115	!! ngrp_ice = group ID for the ice processors
2116	!! ncomm_ice = communicator for the ice procs.
2117	!! n_ice_root = number (in the world) of proc 0 in the ice comm.
2118	!!
2119	!!----------------------------------------------------------------------
2120	INTEGER, INTENT(in) :: pindic
2121	INTEGER, INTENT(in) :: kumout ! ocean.output logical unit
2122	!!
2123	INTEGER :: jjproc
2124	INTEGER :: ii, ierr
2125	INTEGER, ALLOCATABLE, DIMENSION(:) :: kice
2126	INTEGER, ALLOCATABLE, DIMENSION(:) :: zwork
2127	!!----------------------------------------------------------------------
2128	!
2129	! Since this is just an init routine and these arrays are of length jpnij
2130	! then don't use wrk_nemo module - just allocate and deallocate.
2131	ALLOCATE( kice(jpnij), zwork(jpnij), STAT=ierr )
2132	IF( ierr /= 0 ) THEN
2133	WRITE(kumout, cform_err)
2134	WRITE(kumout,*) 'mpp_ini_ice : failed to allocate 2, 1D arrays (jpnij in length)'
2135	CALL mppstop
2136	ENDIF
2137
2138	! Look for how many procs with sea-ice
2139	!
2140	kice = 0
2141	DO jjproc = 1, jpnij
2142	IF( jjproc == narea .AND. pindic .GT. 0 ) kice(jjproc) = 1
2143	END DO
2144	!
2145	zwork = 0
2146	CALL MPI_ALLREDUCE( kice, zwork, jpnij, mpi_integer, mpi_sum, mpi_comm_opa, ierr )
2147	ndim_rank_ice = SUM( zwork )
2148
2149	! Allocate the right size to nrank_north
2150	IF( ALLOCATED ( nrank_ice ) ) DEALLOCATE( nrank_ice )
2151	ALLOCATE( nrank_ice(ndim_rank_ice) )
2152	!
2153	ii = 0
2154	nrank_ice = 0
2155	DO jjproc = 1, jpnij
2156	IF( zwork(jjproc) == 1) THEN
2157	ii = ii + 1
2158	nrank_ice(ii) = jjproc -1
2159	ENDIF
2160	END DO
2161
2162	! Create the world group
2163	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_iworld, ierr )
2164
2165	! Create the ice group from the world group
2166	CALL MPI_GROUP_INCL( ngrp_iworld, ndim_rank_ice, nrank_ice, ngrp_ice, ierr )
2167
2168	! Create the ice communicator , ie the pool of procs with sea-ice
2169	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_ice, ncomm_ice, ierr )
2170
2171	! Find proc number in the world of proc 0 in the north
2172	! The following line seems to be useless, we just comment & keep it as reminder
2173	! CALL MPI_GROUP_TRANSLATE_RANKS(ngrp_ice,1,0,ngrp_iworld,n_ice_root,ierr)
2174	!
2175	CALL MPI_GROUP_FREE(ngrp_ice, ierr)
2176	CALL MPI_GROUP_FREE(ngrp_iworld, ierr)
2177
2178	DEALLOCATE(kice, zwork)
2179	!
2180	END SUBROUTINE mpp_ini_ice
2181
2182
2183	SUBROUTINE mpp_ini_znl( kumout )
2184	!!----------------------------------------------------------------------
2185	!! * routine mpp_ini_znl *
2186	!!
2187	!! ** Purpose : Initialize special communicator for computing zonal sum
2188	!!
2189	!! ** Method : - Look for processors in the same row
2190	!! - Put their number in nrank_znl
2191	!! - Create group for the znl processors
2192	!! - Create a communicator for znl processors
2193	!! - Determine if processor should write znl files
2194	!!
2195	!! ** output
2196	!! ndim_rank_znl = number of processors on the same row
2197	!! ngrp_znl = group ID for the znl processors
2198	!! ncomm_znl = communicator for the ice procs.
2199	!! n_znl_root = number (in the world) of proc 0 in the ice comm.
2200	!!
2201	!!----------------------------------------------------------------------
2202	INTEGER, INTENT(in) :: kumout ! ocean.output logical units
2203	!
2204	INTEGER :: jproc ! dummy loop integer
2205	INTEGER :: ierr, ii ! local integer
2206	INTEGER, ALLOCATABLE, DIMENSION(:) :: kwork
2207	!!----------------------------------------------------------------------
2208	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_world : ', ngrp_world
2209	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_world : ', mpi_comm_world
2210	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_opa : ', mpi_comm_opa
2211	!
2212	ALLOCATE( kwork(jpnij), STAT=ierr )
2213	IF( ierr /= 0 ) THEN
2214	WRITE(kumout, cform_err)
2215	WRITE(kumout,*) 'mpp_ini_znl : failed to allocate 1D array of length jpnij'
2216	CALL mppstop
2217	ENDIF
2218
2219	IF( jpnj == 1 ) THEN
2220	ngrp_znl = ngrp_world
2221	ncomm_znl = mpi_comm_opa
2222	ELSE
2223	!
2224	CALL MPI_ALLGATHER ( njmpp, 1, mpi_integer, kwork, 1, mpi_integer, mpi_comm_opa, ierr )
2225	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - kwork pour njmpp : ', kwork
2226	!-$$ CALL flush(numout)
2227	!
2228	! Count number of processors on the same row
2229	ndim_rank_znl = 0
2230	DO jproc=1,jpnij
2231	IF ( kwork(jproc) == njmpp ) THEN
2232	ndim_rank_znl = ndim_rank_znl + 1
2233	ENDIF
2234	END DO
2235	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ndim_rank_znl : ', ndim_rank_znl
2236	!-$$ CALL flush(numout)
2237	! Allocate the right size to nrank_znl
2238	IF (ALLOCATED (nrank_znl)) DEALLOCATE(nrank_znl)
2239	ALLOCATE(nrank_znl(ndim_rank_znl))
2240	ii = 0
2241	nrank_znl (:) = 0
2242	DO jproc=1,jpnij
2243	IF ( kwork(jproc) == njmpp) THEN
2244	ii = ii + 1
2245	nrank_znl(ii) = jproc -1
2246	ENDIF
2247	END DO
2248	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - nrank_znl : ', nrank_znl
2249	!-$$ CALL flush(numout)
2250
2251	! Create the opa group
2252	CALL MPI_COMM_GROUP(mpi_comm_opa,ngrp_opa,ierr)
2253	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_opa : ', ngrp_opa
2254	!-$$ CALL flush(numout)
2255
2256	! Create the znl group from the opa group
2257	CALL MPI_GROUP_INCL ( ngrp_opa, ndim_rank_znl, nrank_znl, ngrp_znl, ierr )
2258	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_znl ', ngrp_znl
2259	!-$$ CALL flush(numout)
2260
2261	! Create the znl communicator from the opa communicator, ie the pool of procs in the same row
2262	CALL MPI_COMM_CREATE ( mpi_comm_opa, ngrp_znl, ncomm_znl, ierr )
2263	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ncomm_znl ', ncomm_znl
2264	!-$$ CALL flush(numout)
2265	!
2266	END IF
2267
2268	! Determines if processor if the first (starting from i=1) on the row
2269	IF ( jpni == 1 ) THEN
2270	l_znl_root = .TRUE.
2271	ELSE
2272	l_znl_root = .FALSE.
2273	kwork (1) = nimpp
2274	CALL mpp_min ( kwork(1), kcom = ncomm_znl)
2275	IF ( nimpp == kwork(1)) l_znl_root = .TRUE.
2276	END IF
2277
2278	DEALLOCATE(kwork)
2279
2280	END SUBROUTINE mpp_ini_znl
2281
2282
2283	SUBROUTINE mpp_ini_north
2284	!!----------------------------------------------------------------------
2285	!! * routine mpp_ini_north *
2286	!!
2287	!! ** Purpose : Initialize special communicator for north folding
2288	!! condition together with global variables needed in the mpp folding
2289	!!
2290	!! ** Method : - Look for northern processors
2291	!! - Put their number in nrank_north
2292	!! - Create groups for the world processors and the north processors
2293	!! - Create a communicator for northern processors
2294	!!
2295	!! ** output
2296	!! njmppmax = njmpp for northern procs
2297	!! ndim_rank_north = number of processors in the northern line
2298	!! nrank_north (ndim_rank_north) = number of the northern procs.
2299	!! ngrp_world = group ID for the world processors
2300	!! ngrp_north = group ID for the northern processors
2301	!! ncomm_north = communicator for the northern procs.
2302	!! north_root = number (in the world) of proc 0 in the northern comm.
2303	!!
2304	!!----------------------------------------------------------------------
2305	INTEGER :: ierr
2306	INTEGER :: jjproc
2307	INTEGER :: ii, ji
2308	!!----------------------------------------------------------------------
2309	!
2310	njmppmax = MAXVAL( njmppt )
2311	!
2312	! Look for how many procs on the northern boundary
2313	ndim_rank_north = 0
2314	DO jjproc = 1, jpnij
2315	IF( njmppt(jjproc) == njmppmax ) ndim_rank_north = ndim_rank_north + 1
2316	END DO
2317	!
2318	! Allocate the right size to nrank_north
2319	IF (ALLOCATED (nrank_north)) DEALLOCATE(nrank_north)
2320	ALLOCATE( nrank_north(ndim_rank_north) )
2321
2322	! Fill the nrank_north array with proc. number of northern procs.
2323	! Note : the rank start at 0 in MPI
2324	ii = 0
2325	DO ji = 1, jpnij
2326	IF ( njmppt(ji) == njmppmax ) THEN
2327	ii=ii+1
2328	nrank_north(ii)=ji-1
2329	END IF
2330	END DO
2331	!
2332	! create the world group
2333	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_world, ierr )
2334	!
2335	! Create the North group from the world group
2336	CALL MPI_GROUP_INCL( ngrp_world, ndim_rank_north, nrank_north, ngrp_north, ierr )
2337	!
2338	! Create the North communicator , ie the pool of procs in the north group
2339	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_north, ncomm_north, ierr )
2340	!
2341	END SUBROUTINE mpp_ini_north
2342
2343
2344	SUBROUTINE mpp_lbc_north_3d( pt3d, cd_type, psgn )
2345	!!---------------------------------------------------------------------
2346	!! * routine mpp_lbc_north_3d *
2347	!!
2348	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2349	!! in mpp configuration in case of jpn1 > 1
2350	!!
2351	!! ** Method : North fold condition and mpp with more than one proc
2352	!! in i-direction require a specific treatment. We gather
2353	!! the 4 northern lines of the global domain on 1 processor
2354	!! and apply lbc north-fold on this sub array. Then we
2355	!! scatter the north fold array back to the processors.
2356	!!
2357	!!----------------------------------------------------------------------
2358	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pt3d ! 3D array on which the b.c. is applied
2359	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2360	! ! = T , U , V , F or W gridpoints
2361	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2362	!! ! = 1. , the sign is kept
2363	INTEGER :: ji, jj, jr, jk
2364	INTEGER :: ierr, itaille, ildi, ilei, iilb
2365	INTEGER :: ijpj, ijpjm1, ij, iproc
2366	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2367	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2368	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for mpi_isend when avoiding mpi_allgather
2369	! ! Workspace for message transfers avoiding mpi_allgather
2370	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztab
2371	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2372	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: znorthgloio
2373	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztabl, ztabr
2374
2375	INTEGER :: istatus(mpi_status_size)
2376	INTEGER :: iflag
2377	!!----------------------------------------------------------------------
2378	!
2379	ALLOCATE( ztab(jpiglo,4,jpk) , znorthloc(jpi,4,jpk), zfoldwk(jpi,4,jpk), znorthgloio(jpi,4,jpk,jpni) )
2380	ALLOCATE( ztabl(jpi,4,jpk), ztabr(jpi*jpmaxngh, 4, jpk) )
2381
2382	ijpj = 4
2383	ijpjm1 = 3
2384	!
2385	znorthloc(:,:,:) = 0
2386	DO jk = 1, jpk
2387	DO jj = nlcj - ijpj +1, nlcj ! put in xnorthloc the last 4 jlines of pt3d
2388	ij = jj - nlcj + ijpj
2389	znorthloc(:,ij,jk) = pt3d(:,jj,jk)
2390	END DO
2391	END DO
2392	!
2393	! ! Build in procs of ncomm_north the znorthgloio
2394	itaille = jpi * jpk * ijpj
2395
2396	IF ( l_north_nogather ) THEN
2397	!
2398	ztabr(:,:,:) = 0
2399	ztabl(:,:,:) = 0
2400
2401	DO jk = 1, jpk
2402	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2403	ij = jj - nlcj + ijpj
2404	DO ji = nfsloop, nfeloop
2405	ztabl(ji,ij,jk) = pt3d(ji,jj,jk)
2406	END DO
2407	END DO
2408	END DO
2409
2410	DO jr = 1,nsndto
2411	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2412	CALL mppsend( 5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr) )
2413	ENDIF
2414	END DO
2415	DO jr = 1,nsndto
2416	iproc = nfipproc(isendto(jr),jpnj)
2417	IF(iproc .ne. -1) THEN
2418	ilei = nleit (iproc+1)
2419	ildi = nldit (iproc+1)
2420	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2421	ENDIF
2422	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2423	CALL mpprecv(5, zfoldwk, itaille, iproc)
2424	DO jk = 1, jpk
2425	DO jj = 1, ijpj
2426	DO ji = ildi, ilei
2427	ztabr(iilb+ji,jj,jk) = zfoldwk(ji,jj,jk)
2428	END DO
2429	END DO
2430	END DO
2431	ELSE IF (iproc .eq. (narea-1)) THEN
2432	DO jk = 1, jpk
2433	DO jj = 1, ijpj
2434	DO ji = ildi, ilei
2435	ztabr(iilb+ji,jj,jk) = pt3d(ji,nlcj-ijpj+jj,jk)
2436	END DO
2437	END DO
2438	END DO
2439	ENDIF
2440	END DO
2441	IF (l_isend) THEN
2442	DO jr = 1,nsndto
2443	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2444	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2445	ENDIF
2446	END DO
2447	ENDIF
2448	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2449	DO jk = 1, jpk
2450	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2451	ij = jj - nlcj + ijpj
2452	DO ji= 1, nlci
2453	pt3d(ji,jj,jk) = ztabl(ji,ij,jk)
2454	END DO
2455	END DO
2456	END DO
2457	!
2458
2459	ELSE
2460	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2461	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2462	!
2463	ztab(:,:,:) = 0.e0
2464	DO jr = 1, ndim_rank_north ! recover the global north array
2465	iproc = nrank_north(jr) + 1
2466	ildi = nldit (iproc)
2467	ilei = nleit (iproc)
2468	iilb = nimppt(iproc)
2469	DO jk = 1, jpk
2470	DO jj = 1, ijpj
2471	DO ji = ildi, ilei
2472	ztab(ji+iilb-1,jj,jk) = znorthgloio(ji,jj,jk,jr)
2473	END DO
2474	END DO
2475	END DO
2476	END DO
2477	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2478	!
2479	DO jk = 1, jpk
2480	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2481	ij = jj - nlcj + ijpj
2482	DO ji= 1, nlci
2483	pt3d(ji,jj,jk) = ztab(ji+nimpp-1,ij,jk)
2484	END DO
2485	END DO
2486	END DO
2487	!
2488	ENDIF
2489	!
2490	! The ztab array has been either:
2491	! a. Fully populated by the mpi_allgather operation or
2492	! b. Had the active points for this domain and northern neighbours populated
2493	! by peer to peer exchanges
2494	! Either way the array may be folded by lbc_nfd and the result for the span of
2495	! this domain will be identical.
2496	!
2497	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2498	DEALLOCATE( ztabl, ztabr )
2499	!
2500	END SUBROUTINE mpp_lbc_north_3d
2501
2502
2503	SUBROUTINE mpp_lbc_north_2d( pt2d, cd_type, psgn)
2504	!!---------------------------------------------------------------------
2505	!! * routine mpp_lbc_north_2d *
2506	!!
2507	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2508	!! in mpp configuration in case of jpn1 > 1 (for 2d array )
2509	!!
2510	!! ** Method : North fold condition and mpp with more than one proc
2511	!! in i-direction require a specific treatment. We gather
2512	!! the 4 northern lines of the global domain on 1 processor
2513	!! and apply lbc north-fold on this sub array. Then we
2514	!! scatter the north fold array back to the processors.
2515	!!
2516	!!----------------------------------------------------------------------
2517	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the b.c. is applied
2518	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt2d grid-points
2519	! ! = T , U , V , F or W gridpoints
2520	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2521	!! ! = 1. , the sign is kept
2522	INTEGER :: ji, jj, jr
2523	INTEGER :: ierr, itaille, ildi, ilei, iilb
2524	INTEGER :: ijpj, ijpjm1, ij, iproc
2525	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2526	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2527	INTEGER, DIMENSION(MPI_STATUS_SIZE):: ml_stat ! for mpi_isend when avoiding mpi_allgather
2528	! ! Workspace for message transfers avoiding mpi_allgather
2529	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab
2530	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2531	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio
2532	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztabl, ztabr
2533	INTEGER :: istatus(mpi_status_size)
2534	INTEGER :: iflag
2535	!!----------------------------------------------------------------------
2536	!
2537	ALLOCATE( ztab(jpiglo,4), znorthloc(jpi,4), zfoldwk(jpi,4), znorthgloio(jpi,4,jpni) )
2538	ALLOCATE( ztabl(jpi,4), ztabr(jpi*jpmaxngh, 4) )
2539	!
2540	ijpj = 4
2541	ijpjm1 = 3
2542	!
2543	DO jj = nlcj-ijpj+1, nlcj ! put in znorthloc the last 4 jlines of pt2d
2544	ij = jj - nlcj + ijpj
2545	znorthloc(:,ij) = pt2d(:,jj)
2546	END DO
2547
2548	! ! Build in procs of ncomm_north the znorthgloio
2549	itaille = jpi * ijpj
2550	IF ( l_north_nogather ) THEN
2551	!
2552	! Avoid the use of mpi_allgather by exchanging only with the processes already identified
2553	! (in nemo_northcomms) as being involved in this process' northern boundary exchange
2554	!
2555	ztabr(:,:) = 0
2556	ztabl(:,:) = 0
2557
2558	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2559	ij = jj - nlcj + ijpj
2560	DO ji = nfsloop, nfeloop
2561	ztabl(ji,ij) = pt2d(ji,jj)
2562	END DO
2563	END DO
2564
2565	DO jr = 1,nsndto
2566	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2567	CALL mppsend(5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr))
2568	ENDIF
2569	END DO
2570	DO jr = 1,nsndto
2571	iproc = nfipproc(isendto(jr),jpnj)
2572	IF(iproc .ne. -1) THEN
2573	ilei = nleit (iproc+1)
2574	ildi = nldit (iproc+1)
2575	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2576	ENDIF
2577	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2578	CALL mpprecv(5, zfoldwk, itaille, iproc)
2579	DO jj = 1, ijpj
2580	DO ji = ildi, ilei
2581	ztabr(iilb+ji,jj) = zfoldwk(ji,jj)
2582	END DO
2583	END DO
2584	ELSE IF (iproc .eq. (narea-1)) THEN
2585	DO jj = 1, ijpj
2586	DO ji = ildi, ilei
2587	ztabr(iilb+ji,jj) = pt2d(ji,nlcj-ijpj+jj)
2588	END DO
2589	END DO
2590	ENDIF
2591	END DO
2592	IF (l_isend) THEN
2593	DO jr = 1,nsndto
2594	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2595	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2596	ENDIF
2597	END DO
2598	ENDIF
2599	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2600	!
2601	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2602	ij = jj - nlcj + ijpj
2603	DO ji = 1, nlci
2604	pt2d(ji,jj) = ztabl(ji,ij)
2605	END DO
2606	END DO
2607	!
2608	ELSE
2609	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2610	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2611	!
2612	ztab(:,:) = 0.e0
2613	DO jr = 1, ndim_rank_north ! recover the global north array
2614	iproc = nrank_north(jr) + 1
2615	ildi = nldit (iproc)
2616	ilei = nleit (iproc)
2617	iilb = nimppt(iproc)
2618	DO jj = 1, ijpj
2619	DO ji = ildi, ilei
2620	ztab(ji+iilb-1,jj) = znorthgloio(ji,jj,jr)
2621	END DO
2622	END DO
2623	END DO
2624	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2625	!
2626	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2627	ij = jj - nlcj + ijpj
2628	DO ji = 1, nlci
2629	pt2d(ji,jj) = ztab(ji+nimpp-1,ij)
2630	END DO
2631	END DO
2632	!
2633	ENDIF
2634	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2635	DEALLOCATE( ztabl, ztabr )
2636	!
2637	END SUBROUTINE mpp_lbc_north_2d
2638
2639	SUBROUTINE mpp_lbc_north_2d_multiple( pt2d_array, cd_type, psgn, num_fields)
2640	!!---------------------------------------------------------------------
2641	!! * routine mpp_lbc_north_2d *
2642	!!
2643	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2644	!! in mpp configuration in case of jpn1 > 1
2645	!! (for multiple 2d arrays )
2646	!!
2647	!! ** Method : North fold condition and mpp with more than one proc
2648	!! in i-direction require a specific treatment. We gather
2649	!! the 4 northern lines of the global domain on 1 processor
2650	!! and apply lbc north-fold on this sub array. Then we
2651	!! scatter the north fold array back to the processors.
2652	!!
2653	!!----------------------------------------------------------------------
2654	INTEGER , INTENT (in ) :: num_fields ! number of variables contained in pt2d
2655	TYPE( arrayptr ), DIMENSION(:) :: pt2d_array
2656	CHARACTER(len=1), DIMENSION(:), INTENT(in ) :: cd_type ! nature of pt2d grid-points
2657	! ! = T , U , V , F or W gridpoints
2658	REAL(wp), DIMENSION(:), INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2659	!! ! = 1. , the sign is kept
2660	INTEGER :: ji, jj, jr, jk
2661	INTEGER :: ierr, itaille, ildi, ilei, iilb
2662	INTEGER :: ijpj, ijpjm1, ij, iproc
2663	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2664	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2665	INTEGER, DIMENSION(MPI_STATUS_SIZE):: ml_stat ! for mpi_isend when avoiding mpi_allgather
2666	! ! Workspace for message transfers avoiding mpi_allgather
2667	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztab
2668	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2669	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: znorthgloio
2670	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztabl, ztabr
2671	INTEGER :: istatus(mpi_status_size)
2672	INTEGER :: iflag
2673	!!----------------------------------------------------------------------
2674	!
2675	ALLOCATE( ztab(jpiglo,4,num_fields), znorthloc(jpi,4,num_fields), zfoldwk(jpi,4,num_fields), &
2676	& znorthgloio(jpi,4,num_fields,jpni) ) ! expanded to 3 dimensions
2677	ALLOCATE( ztabl(jpi,4,num_fields), ztabr(jpi*jpmaxngh, 4,num_fields) )
2678	!
2679	ijpj = 4
2680	ijpjm1 = 3
2681	!
2682
2683	DO jk = 1, num_fields
2684	DO jj = nlcj-ijpj+1, nlcj ! put in znorthloc the last 4 jlines of pt2d (for every variable)
2685	ij = jj - nlcj + ijpj
2686	znorthloc(:,ij,jk) = pt2d_array(jk)%pt2d(:,jj)
2687	END DO
2688	END DO
2689	! ! Build in procs of ncomm_north the znorthgloio
2690	itaille = jpi * ijpj
2691
2692	IF ( l_north_nogather ) THEN
2693	!
2694	! Avoid the use of mpi_allgather by exchanging only with the processes already identified
2695	! (in nemo_northcomms) as being involved in this process' northern boundary exchange
2696	!
2697	ztabr(:,:,:) = 0
2698	ztabl(:,:,:) = 0
2699
2700	DO jk = 1, num_fields
2701	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2702	ij = jj - nlcj + ijpj
2703	DO ji = nfsloop, nfeloop
2704	ztabl(ji,ij,jk) = pt2d_array(jk)%pt2d(ji,jj)
2705	END DO
2706	END DO
2707	END DO
2708
2709	DO jr = 1,nsndto
2710	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2711	CALL mppsend(5, znorthloc, itaille*num_fields, nfipproc(isendto(jr),jpnj), ml_req_nf(jr)) ! Buffer expanded "num_fields" times
2712	ENDIF
2713	END DO
2714	DO jr = 1,nsndto
2715	iproc = nfipproc(isendto(jr),jpnj)
2716	IF(iproc .ne. -1) THEN
2717	ilei = nleit (iproc+1)
2718	ildi = nldit (iproc+1)
2719	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2720	ENDIF
2721	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2722	CALL mpprecv(5, zfoldwk, itaille*num_fields, iproc) ! Buffer expanded "num_fields" times
2723	DO jk = 1 , num_fields
2724	DO jj = 1, ijpj
2725	DO ji = ildi, ilei
2726	ztabr(iilb+ji,jj,jk) = zfoldwk(ji,jj,jk) ! Modified to 3D
2727	END DO
2728	END DO
2729	END DO
2730	ELSE IF (iproc .eq. (narea-1)) THEN
2731	DO jk = 1, num_fields
2732	DO jj = 1, ijpj
2733	DO ji = ildi, ilei
2734	ztabr(iilb+ji,jj,jk) = pt2d_array(jk)%pt2d(ji,nlcj-ijpj+jj) ! Modified to 3D
2735	END DO
2736	END DO
2737	END DO
2738	ENDIF
2739	END DO
2740	IF (l_isend) THEN
2741	DO jr = 1,nsndto
2742	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2743	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2744	ENDIF
2745	END DO
2746	ENDIF
2747	!
2748	DO ji = 1, num_fields ! Loop to manage 3D variables
2749	CALL mpp_lbc_nfd( ztabl(:,:,ji), ztabr(:,:,ji), cd_type(ji), psgn(ji) ) ! North fold boundary condition
2750	END DO
2751	!
2752	DO jk = 1, num_fields
2753	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2754	ij = jj - nlcj + ijpj
2755	DO ji = 1, nlci
2756	pt2d_array(jk)%pt2d(ji,jj) = ztabl(ji,ij,jk) ! Modified to 3D
2757	END DO
2758	END DO
2759	END DO
2760
2761	!
2762	ELSE
2763	!
2764	CALL MPI_ALLGATHER( znorthloc , itaille*num_fields, MPI_DOUBLE_PRECISION, &
2765	& znorthgloio, itaille*num_fields, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2766	!
2767	ztab(:,:,:) = 0.e0
2768	DO jk = 1, num_fields
2769	DO jr = 1, ndim_rank_north ! recover the global north array
2770	iproc = nrank_north(jr) + 1
2771	ildi = nldit (iproc)
2772	ilei = nleit (iproc)
2773	iilb = nimppt(iproc)
2774	DO jj = 1, ijpj
2775	DO ji = ildi, ilei
2776	ztab(ji+iilb-1,jj,jk) = znorthgloio(ji,jj,jk,jr)
2777	END DO
2778	END DO
2779	END DO
2780	END DO
2781
2782	DO ji = 1, num_fields
2783	CALL lbc_nfd( ztab(:,:,ji), cd_type(ji), psgn(ji) ) ! North fold boundary condition
2784	END DO
2785	!
2786	DO jk = 1, num_fields
2787	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2788	ij = jj - nlcj + ijpj
2789	DO ji = 1, nlci
2790	pt2d_array(jk)%pt2d(ji,jj) = ztab(ji+nimpp-1,ij,jk)
2791	END DO
2792	END DO
2793	END DO
2794	!
2795	!
2796	ENDIF
2797	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2798	DEALLOCATE( ztabl, ztabr )
2799	!
2800	END SUBROUTINE mpp_lbc_north_2d_multiple
2801
2802	SUBROUTINE mpp_lbc_north_e( pt2d, cd_type, psgn)
2803	!!---------------------------------------------------------------------
2804	!! * routine mpp_lbc_north_2d *
2805	!!
2806	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2807	!! in mpp configuration in case of jpn1 > 1 and for 2d
2808	!! array with outer extra halo
2809	!!
2810	!! ** Method : North fold condition and mpp with more than one proc
2811	!! in i-direction require a specific treatment. We gather
2812	!! the 4+2*jpr2dj northern lines of the global domain on 1
2813	!! processor and apply lbc north-fold on this sub array.
2814	!! Then we scatter the north fold array back to the processors.
2815	!!
2816	!!----------------------------------------------------------------------
2817	REAL(wp), DIMENSION(1-jpr2di:jpi+jpr2di,1-jpr2dj:jpj+jpr2dj), INTENT(inout) :: pt2d ! 2D array with extra halo
2818	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2819	! ! = T , U , V , F or W -points
2820	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
2821	!! ! north fold, = 1. otherwise
2822	INTEGER :: ji, jj, jr
2823	INTEGER :: ierr, itaille, ildi, ilei, iilb
2824	INTEGER :: ijpj, ij, iproc
2825	!
2826	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
2827	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
2828
2829	!!----------------------------------------------------------------------
2830	!
2831	ALLOCATE( ztab_e(jpiglo,4+2jpr2dj), znorthloc_e(jpi,4+2jpr2dj), znorthgloio_e(jpi,4+2*jpr2dj,jpni) )
2832
2833	!
2834	ijpj=4
2835	ztab_e(:,:) = 0.e0
2836
2837	ij=0
2838	! put in znorthloc_e the last 4 jlines of pt2d
2839	DO jj = nlcj - ijpj + 1 - jpr2dj, nlcj +jpr2dj
2840	ij = ij + 1
2841	DO ji = 1, jpi
2842	znorthloc_e(ji,ij)=pt2d(ji,jj)
2843	END DO
2844	END DO
2845	!
2846	itaille = jpi * ( ijpj + 2 * jpr2dj )
2847	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
2848	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2849	!
2850	DO jr = 1, ndim_rank_north ! recover the global north array
2851	iproc = nrank_north(jr) + 1
2852	ildi = nldit (iproc)
2853	ilei = nleit (iproc)
2854	iilb = nimppt(iproc)
2855	DO jj = 1, ijpj+2*jpr2dj
2856	DO ji = ildi, ilei
2857	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
2858	END DO
2859	END DO
2860	END DO
2861
2862
2863	! 2. North-Fold boundary conditions
2864	! ----------------------------------
2865	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = jpr2dj )
2866
2867	ij = jpr2dj
2868	!! Scatter back to pt2d
2869	DO jj = nlcj - ijpj + 1 , nlcj +jpr2dj
2870	ij = ij +1
2871	DO ji= 1, nlci
2872	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
2873	END DO
2874	END DO
2875	!
2876	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
2877	!
2878	END SUBROUTINE mpp_lbc_north_e
2879
2880	SUBROUTINE mpp_lnk_bdy_3d( ptab, cd_type, psgn, ib_bdy )
2881	!!----------------------------------------------------------------------
2882	!! * routine mpp_lnk_bdy_3d *
2883	!!
2884	!! ** Purpose : Message passing management
2885	!!
2886	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
2887	!! between processors following neighboring subdomains.
2888	!! domain parameters
2889	!! nlci : first dimension of the local subdomain
2890	!! nlcj : second dimension of the local subdomain
2891	!! nbondi_bdy : mark for "east-west local boundary"
2892	!! nbondj_bdy : mark for "north-south local boundary"
2893	!! noea : number for local neighboring processors
2894	!! nowe : number for local neighboring processors
2895	!! noso : number for local neighboring processors
2896	!! nono : number for local neighboring processors
2897	!!
2898	!! ** Action : ptab with update value at its periphery
2899	!!
2900	!!----------------------------------------------------------------------
2901
2902	USE lbcnfd ! north fold
2903
2904	INCLUDE 'mpif.h'
2905
2906	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
2907	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
2908	! ! = T , U , V , F , W points
2909	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
2910	! ! = 1. , the sign is kept
2911	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
2912	INTEGER :: ji, jj, jk, jl ! dummy loop indices
2913	INTEGER :: imigr, iihom, ijhom ! temporary integers
2914	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
2915	REAL(wp) :: zland
2916	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
2917	!
2918	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
2919	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
2920
2921	!!----------------------------------------------------------------------
2922
2923	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
2924	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
2925
2926	zland = 0.e0
2927
2928	! 1. standard boundary treatment
2929	! ------------------------------
2930
2931	! ! East-West boundaries
2932	! !* Cyclic east-west
2933
2934	IF( nbondi == 2) THEN
2935	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
2936	ptab( 1 ,:,:) = ptab(jpim1,:,:)
2937	ptab(jpi,:,:) = ptab( 2 ,:,:)
2938	ELSE
2939	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2940	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2941	ENDIF
2942	ELSEIF(nbondi == -1) THEN
2943	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2944	ELSEIF(nbondi == 1) THEN
2945	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2946	ENDIF !* closed
2947
2948	IF (nbondj == 2 .OR. nbondj == -1) THEN
2949	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
2950	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
2951	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
2952	ENDIF
2953
2954	!
2955
2956	! 2. East and west directions exchange
2957	! ------------------------------------
2958	! we play with the neigbours AND the row number because of the periodicity
2959	!
2960	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
2961	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
2962	iihom = nlci-nreci
2963	DO jl = 1, jpreci
2964	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
2965	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
2966	END DO
2967	END SELECT
2968	!
2969	! ! Migrations
2970	imigr = jpreci * jpj * jpk
2971	!
2972	SELECT CASE ( nbondi_bdy(ib_bdy) )
2973	CASE ( -1 )
2974	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
2975	CASE ( 0 )
2976	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2977	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
2978	CASE ( 1 )
2979	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2980	END SELECT
2981	!
2982	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2983	CASE ( -1 )
2984	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2985	CASE ( 0 )
2986	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2987	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2988	CASE ( 1 )
2989	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2990	END SELECT
2991	!
2992	SELECT CASE ( nbondi_bdy(ib_bdy) )
2993	CASE ( -1 )
2994	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2995	CASE ( 0 )
2996	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2997	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
2998	CASE ( 1 )
2999	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3000	END SELECT
3001	!
3002	! ! Write Dirichlet lateral conditions
3003	iihom = nlci-jpreci
3004	!
3005	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3006	CASE ( -1 )
3007	DO jl = 1, jpreci
3008	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
3009	END DO
3010	CASE ( 0 )
3011	DO jl = 1, jpreci
3012	ptab(jl ,:,:) = zt3we(:,jl,:,2)
3013	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
3014	END DO
3015	CASE ( 1 )
3016	DO jl = 1, jpreci
3017	ptab(jl ,:,:) = zt3we(:,jl,:,2)
3018	END DO
3019	END SELECT
3020
3021
3022	! 3. North and south directions
3023	! -----------------------------
3024	! always closed : we play only with the neigbours
3025	!
3026	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
3027	ijhom = nlcj-nrecj
3028	DO jl = 1, jprecj
3029	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
3030	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
3031	END DO
3032	ENDIF
3033	!
3034	! ! Migrations
3035	imigr = jprecj * jpi * jpk
3036	!
3037	SELECT CASE ( nbondj_bdy(ib_bdy) )
3038	CASE ( -1 )
3039	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
3040	CASE ( 0 )
3041	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
3042	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
3043	CASE ( 1 )
3044	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
3045	END SELECT
3046	!
3047	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3048	CASE ( -1 )
3049	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
3050	CASE ( 0 )
3051	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
3052	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
3053	CASE ( 1 )
3054	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
3055	END SELECT
3056	!
3057	SELECT CASE ( nbondj_bdy(ib_bdy) )
3058	CASE ( -1 )
3059	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3060	CASE ( 0 )
3061	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3062	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3063	CASE ( 1 )
3064	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3065	END SELECT
3066	!
3067	! ! Write Dirichlet lateral conditions
3068	ijhom = nlcj-jprecj
3069	!
3070	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3071	CASE ( -1 )
3072	DO jl = 1, jprecj
3073	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
3074	END DO
3075	CASE ( 0 )
3076	DO jl = 1, jprecj
3077	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
3078	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
3079	END DO
3080	CASE ( 1 )
3081	DO jl = 1, jprecj
3082	ptab(:,jl,:) = zt3sn(:,jl,:,2)
3083	END DO
3084	END SELECT
3085
3086
3087	! 4. north fold treatment
3088	! -----------------------
3089	!
3090	IF( npolj /= 0) THEN
3091	!
3092	SELECT CASE ( jpni )
3093	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
3094	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
3095	END SELECT
3096	!
3097	ENDIF
3098	!
3099	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
3100	!
3101	END SUBROUTINE mpp_lnk_bdy_3d
3102
3103	SUBROUTINE mpp_lnk_bdy_2d( ptab, cd_type, psgn, ib_bdy )
3104	!!----------------------------------------------------------------------
3105	!! * routine mpp_lnk_bdy_2d *
3106	!!
3107	!! ** Purpose : Message passing management
3108	!!
3109	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
3110	!! between processors following neighboring subdomains.
3111	!! domain parameters
3112	!! nlci : first dimension of the local subdomain
3113	!! nlcj : second dimension of the local subdomain
3114	!! nbondi_bdy : mark for "east-west local boundary"
3115	!! nbondj_bdy : mark for "north-south local boundary"
3116	!! noea : number for local neighboring processors
3117	!! nowe : number for local neighboring processors
3118	!! noso : number for local neighboring processors
3119	!! nono : number for local neighboring processors
3120	!!
3121	!! ** Action : ptab with update value at its periphery
3122	!!
3123	!!----------------------------------------------------------------------
3124
3125	USE lbcnfd ! north fold
3126
3127	INCLUDE 'mpif.h'
3128
3129	REAL(wp), DIMENSION(jpi,jpj) , INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
3130	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
3131	! ! = T , U , V , F , W points
3132	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
3133	! ! = 1. , the sign is kept
3134	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
3135	INTEGER :: ji, jj, jl ! dummy loop indices
3136	INTEGER :: imigr, iihom, ijhom ! temporary integers
3137	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
3138	REAL(wp) :: zland
3139	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
3140	!
3141	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
3142	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
3143
3144	!!----------------------------------------------------------------------
3145
3146	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
3147	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
3148
3149	zland = 0.e0
3150
3151	! 1. standard boundary treatment
3152	! ------------------------------
3153
3154	! ! East-West boundaries
3155	! !* Cyclic east-west
3156
3157	IF( nbondi == 2) THEN
3158	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
3159	ptab( 1 ,:) = ptab(jpim1,:)
3160	ptab(jpi,:) = ptab( 2 ,:)
3161	ELSE
3162	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
3163	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
3164	ENDIF
3165	ELSEIF(nbondi == -1) THEN
3166	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
3167	ELSEIF(nbondi == 1) THEN
3168	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
3169	ENDIF !* closed
3170
3171	IF (nbondj == 2 .OR. nbondj == -1) THEN
3172	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj) = zland ! south except F-point
3173	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
3174	ptab(:,nlcj-jprecj+1:jpj) = zland ! north
3175	ENDIF
3176
3177	!
3178
3179	! 2. East and west directions exchange
3180	! ------------------------------------
3181	! we play with the neigbours AND the row number because of the periodicity
3182	!
3183	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
3184	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
3185	iihom = nlci-nreci
3186	DO jl = 1, jpreci
3187	zt2ew(:,jl,1) = ptab(jpreci+jl,:)
3188	zt2we(:,jl,1) = ptab(iihom +jl,:)
3189	END DO
3190	END SELECT
3191	!
3192	! ! Migrations
3193	imigr = jpreci * jpj
3194	!
3195	SELECT CASE ( nbondi_bdy(ib_bdy) )
3196	CASE ( -1 )
3197	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
3198	CASE ( 0 )
3199	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
3200	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
3201	CASE ( 1 )
3202	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
3203	END SELECT
3204	!
3205	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3206	CASE ( -1 )
3207	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3208	CASE ( 0 )
3209	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3210	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3211	CASE ( 1 )
3212	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3213	END SELECT
3214	!
3215	SELECT CASE ( nbondi_bdy(ib_bdy) )
3216	CASE ( -1 )
3217	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3218	CASE ( 0 )
3219	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3220	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3221	CASE ( 1 )
3222	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3223	END SELECT
3224	!
3225	! ! Write Dirichlet lateral conditions
3226	iihom = nlci-jpreci
3227	!
3228	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3229	CASE ( -1 )
3230	DO jl = 1, jpreci
3231	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3232	END DO
3233	CASE ( 0 )
3234	DO jl = 1, jpreci
3235	ptab(jl ,:) = zt2we(:,jl,2)
3236	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3237	END DO
3238	CASE ( 1 )
3239	DO jl = 1, jpreci
3240	ptab(jl ,:) = zt2we(:,jl,2)
3241	END DO
3242	END SELECT
3243
3244
3245	! 3. North and south directions
3246	! -----------------------------
3247	! always closed : we play only with the neigbours
3248	!
3249	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
3250	ijhom = nlcj-nrecj
3251	DO jl = 1, jprecj
3252	zt2sn(:,jl,1) = ptab(:,ijhom +jl)
3253	zt2ns(:,jl,1) = ptab(:,jprecj+jl)
3254	END DO
3255	ENDIF
3256	!
3257	! ! Migrations
3258	imigr = jprecj * jpi
3259	!
3260	SELECT CASE ( nbondj_bdy(ib_bdy) )
3261	CASE ( -1 )
3262	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
3263	CASE ( 0 )
3264	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3265	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
3266	CASE ( 1 )
3267	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3268	END SELECT
3269	!
3270	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3271	CASE ( -1 )
3272	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3273	CASE ( 0 )
3274	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3275	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3276	CASE ( 1 )
3277	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3278	END SELECT
3279	!
3280	SELECT CASE ( nbondj_bdy(ib_bdy) )
3281	CASE ( -1 )
3282	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3283	CASE ( 0 )
3284	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3285	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3286	CASE ( 1 )
3287	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3288	END SELECT
3289	!
3290	! ! Write Dirichlet lateral conditions
3291	ijhom = nlcj-jprecj
3292	!
3293	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3294	CASE ( -1 )
3295	DO jl = 1, jprecj
3296	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3297	END DO
3298	CASE ( 0 )
3299	DO jl = 1, jprecj
3300	ptab(:,jl ) = zt2sn(:,jl,2)
3301	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3302	END DO
3303	CASE ( 1 )
3304	DO jl = 1, jprecj
3305	ptab(:,jl) = zt2sn(:,jl,2)
3306	END DO
3307	END SELECT
3308
3309
3310	! 4. north fold treatment
3311	! -----------------------
3312	!
3313	IF( npolj /= 0) THEN
3314	!
3315	SELECT CASE ( jpni )
3316	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
3317	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
3318	END SELECT
3319	!
3320	ENDIF
3321	!
3322	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
3323	!
3324	END SUBROUTINE mpp_lnk_bdy_2d
3325
3326	SUBROUTINE mpi_init_opa( ldtxt, ksft, code )
3327	!!---------------------------------------------------------------------
3328	!! * routine mpp_init.opa *
3329	!!
3330	!! ** Purpose :: export and attach a MPI buffer for bsend
3331	!!
3332	!! ** Method :: define buffer size in namelist, if 0 no buffer attachment
3333	!! but classical mpi_init
3334	!!
3335	!! History :: 01/11 :: IDRIS initial version for IBM only
3336	!! 08/04 :: R. Benshila, generalisation
3337	!!---------------------------------------------------------------------
3338	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
3339	INTEGER , INTENT(inout) :: ksft
3340	INTEGER , INTENT( out) :: code
3341	INTEGER :: ierr, ji
3342	LOGICAL :: mpi_was_called
3343	!!---------------------------------------------------------------------
3344	!
3345	CALL mpi_initialized( mpi_was_called, code ) ! MPI initialization
3346	IF ( code /= MPI_SUCCESS ) THEN
3347	DO ji = 1, SIZE(ldtxt)
3348	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3349	END DO
3350	WRITE(*, cform_err)
3351	WRITE(, ) ' lib_mpp: Error in routine mpi_initialized'
3352	CALL mpi_abort( mpi_comm_world, code, ierr )
3353	ENDIF
3354	!
3355	IF( .NOT. mpi_was_called ) THEN
3356	CALL mpi_init( code )
3357	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code )
3358	IF ( code /= MPI_SUCCESS ) THEN
3359	DO ji = 1, SIZE(ldtxt)
3360	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3361	END DO
3362	WRITE(*, cform_err)
3363	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
3364	CALL mpi_abort( mpi_comm_world, code, ierr )
3365	ENDIF
3366	ENDIF
3367	!
3368	IF( nn_buffer > 0 ) THEN
3369	WRITE(ldtxt(ksft),*) 'mpi_bsend, buffer allocation of : ', nn_buffer ; ksft = ksft + 1
3370	! Buffer allocation and attachment
3371	ALLOCATE( tampon(nn_buffer), stat = ierr )
3372	IF( ierr /= 0 ) THEN
3373	DO ji = 1, SIZE(ldtxt)
3374	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3375	END DO
3376	WRITE(*, cform_err)
3377	WRITE(, ) ' lib_mpp: Error in ALLOCATE', ierr
3378	CALL mpi_abort( mpi_comm_world, code, ierr )
3379	END IF
3380	CALL mpi_buffer_attach( tampon, nn_buffer, code )
3381	ENDIF
3382	!
3383	END SUBROUTINE mpi_init_opa
3384
3385	SUBROUTINE DDPDD_MPI (ydda, yddb, ilen, itype)
3386	!!---------------------------------------------------------------------
3387	!! Routine DDPDD_MPI: used by reduction operator MPI_SUMDD
3388	!!
3389	!! Modification of original codes written by David H. Bailey
3390	!! This subroutine computes yddb(i) = ydda(i)+yddb(i)
3391	!!---------------------------------------------------------------------
3392	INTEGER, INTENT(in) :: ilen, itype
3393	COMPLEX(wp), DIMENSION(ilen), INTENT(in) :: ydda
3394	COMPLEX(wp), DIMENSION(ilen), INTENT(inout) :: yddb
3395	!
3396	REAL(wp) :: zerr, zt1, zt2 ! local work variables
3397	INTEGER :: ji, ztmp ! local scalar
3398
3399	ztmp = itype ! avoid compilation warning
3400
3401	DO ji=1,ilen
3402	! Compute ydda + yddb using Knuth's trick.
3403	zt1 = real(ydda(ji)) + real(yddb(ji))
3404	zerr = zt1 - real(ydda(ji))
3405	zt2 = ((real(yddb(ji)) - zerr) + (real(ydda(ji)) - (zt1 - zerr))) &
3406	+ aimag(ydda(ji)) + aimag(yddb(ji))
3407
3408	! The result is zt1 + zt2, after normalization.
3409	yddb(ji) = cmplx ( zt1 + zt2, zt2 - ((zt1 + zt2) - zt1),wp )
3410	END DO
3411
3412	END SUBROUTINE DDPDD_MPI
3413
3414	SUBROUTINE mpp_lbc_north_icb( pt2d, cd_type, psgn, pr2dj)
3415	!!---------------------------------------------------------------------
3416	!! * routine mpp_lbc_north_icb *
3417	!!
3418	!! ** Purpose : Ensure proper north fold horizontal bondary condition
3419	!! in mpp configuration in case of jpn1 > 1 and for 2d
3420	!! array with outer extra halo
3421	!!
3422	!! ** Method : North fold condition and mpp with more than one proc
3423	!! in i-direction require a specific treatment. We gather
3424	!! the 4+2*jpr2dj northern lines of the global domain on 1
3425	!! processor and apply lbc north-fold on this sub array.
3426	!! Then we scatter the north fold array back to the processors.
3427	!! This version accounts for an extra halo with icebergs.
3428	!!
3429	!!----------------------------------------------------------------------
3430	REAL(wp), DIMENSION(:,:), INTENT(inout) :: pt2d ! 2D array with extra halo
3431	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
3432	! ! = T , U , V , F or W -points
3433	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
3434	!! ! north fold, = 1. otherwise
3435	INTEGER, OPTIONAL , INTENT(in ) :: pr2dj
3436	INTEGER :: ji, jj, jr
3437	INTEGER :: ierr, itaille, ildi, ilei, iilb
3438	INTEGER :: ijpj, ij, iproc, ipr2dj
3439	!
3440	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
3441	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
3442
3443	!!----------------------------------------------------------------------
3444	!
3445	ijpj=4
3446	IF( PRESENT(pr2dj) ) THEN ! use of additional halos
3447	ipr2dj = pr2dj
3448	ELSE
3449	ipr2dj = 0
3450	ENDIF
3451	ALLOCATE( ztab_e(jpiglo,4+2ipr2dj), znorthloc_e(jpi,4+2ipr2dj), znorthgloio_e(jpi,4+2*ipr2dj,jpni) )
3452
3453	!
3454	ztab_e(:,:) = 0.e0
3455
3456	ij=0
3457	! put in znorthloc_e the last 4 jlines of pt2d
3458	DO jj = nlcj - ijpj + 1 - ipr2dj, nlcj +ipr2dj
3459	ij = ij + 1
3460	DO ji = 1, jpi
3461	znorthloc_e(ji,ij)=pt2d(ji,jj)
3462	END DO
3463	END DO
3464	!
3465	itaille = jpi * ( ijpj + 2 * ipr2dj )
3466	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
3467	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
3468	!
3469	DO jr = 1, ndim_rank_north ! recover the global north array
3470	iproc = nrank_north(jr) + 1
3471	ildi = nldit (iproc)
3472	ilei = nleit (iproc)
3473	iilb = nimppt(iproc)
3474	DO jj = 1, ijpj+2*ipr2dj
3475	DO ji = ildi, ilei
3476	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
3477	END DO
3478	END DO
3479	END DO
3480
3481
3482	! 2. North-Fold boundary conditions
3483	! ----------------------------------
3484	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = ipr2dj )
3485
3486	ij = ipr2dj
3487	!! Scatter back to pt2d
3488	DO jj = nlcj - ijpj + 1 , nlcj +ipr2dj
3489	ij = ij +1
3490	DO ji= 1, nlci
3491	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
3492	END DO
3493	END DO
3494	!
3495	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
3496	!
3497	END SUBROUTINE mpp_lbc_north_icb
3498
3499	SUBROUTINE mpp_lnk_2d_icb( pt2d, cd_type, psgn, jpri, jprj )
3500	!!----------------------------------------------------------------------
3501	!! * routine mpp_lnk_2d_icb *
3502	!!
3503	!! ** Purpose : Message passing manadgement for 2d array (with extra halo and icebergs)
3504	!!
3505	!! ** Method : Use mppsend and mpprecv function for passing mask
3506	!! between processors following neighboring subdomains.
3507	!! domain parameters
3508	!! nlci : first dimension of the local subdomain
3509	!! nlcj : second dimension of the local subdomain
3510	!! jpri : number of rows for extra outer halo
3511	!! jprj : number of columns for extra outer halo
3512	!! nbondi : mark for "east-west local boundary"
3513	!! nbondj : mark for "north-south local boundary"
3514	!! noea : number for local neighboring processors
3515	!! nowe : number for local neighboring processors
3516	!! noso : number for local neighboring processors
3517	!! nono : number for local neighboring processors
3518	!!
3519	!!----------------------------------------------------------------------
3520	INTEGER , INTENT(in ) :: jpri
3521	INTEGER , INTENT(in ) :: jprj
3522	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
3523	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
3524	! ! = T , U , V , F , W and I points
3525	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
3526	!! ! north boundary, = 1. otherwise
3527	INTEGER :: jl ! dummy loop indices
3528	INTEGER :: imigr, iihom, ijhom ! temporary integers
3529	INTEGER :: ipreci, iprecj ! temporary integers
3530	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
3531	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
3532	!!
3533	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
3534	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
3535	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
3536	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
3537	!!----------------------------------------------------------------------
3538
3539	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
3540	iprecj = jprecj + jprj
3541
3542
3543	! 1. standard boundary treatment
3544	! ------------------------------
3545	! Order matters Here !!!!
3546	!
3547	! ! East-West boundaries
3548	! !* Cyclic east-west
3549	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
3550	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
3551	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
3552	!
3553	ELSE !* closed
3554	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
3555	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
3556	ENDIF
3557	!
3558
3559	! north fold treatment
3560	! -----------------------
3561	IF( npolj /= 0 ) THEN
3562	!
3563	SELECT CASE ( jpni )
3564	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
3565	CASE DEFAULT ; CALL mpp_lbc_north_icb( pt2d(1:jpi,1:jpj+jprj) , cd_type, psgn , pr2dj=jprj )
3566	END SELECT
3567	!
3568	ENDIF
3569
3570	! 2. East and west directions exchange
3571	! ------------------------------------
3572	! we play with the neigbours AND the row number because of the periodicity
3573	!
3574	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
3575	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
3576	iihom = nlci-nreci-jpri
3577	DO jl = 1, ipreci
3578	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
3579	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
3580	END DO
3581	END SELECT
3582	!
3583	! ! Migrations
3584	imigr = ipreci * ( jpj + 2*jprj)
3585	!
3586	SELECT CASE ( nbondi )
3587	CASE ( -1 )
3588	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
3589	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3590	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3591	CASE ( 0 )
3592	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3593	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
3594	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3595	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3596	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3597	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3598	CASE ( 1 )
3599	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3600	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3601	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3602	END SELECT
3603	!
3604	! ! Write Dirichlet lateral conditions
3605	iihom = nlci - jpreci
3606	!
3607	SELECT CASE ( nbondi )
3608	CASE ( -1 )
3609	DO jl = 1, ipreci
3610	pt2d(iihom+jl,:) = r2dew(:,jl,2)
3611	END DO
3612	CASE ( 0 )
3613	DO jl = 1, ipreci
3614	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3615	pt2d( iihom+jl,:) = r2dew(:,jl,2)
3616	END DO
3617	CASE ( 1 )
3618	DO jl = 1, ipreci
3619	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3620	END DO
3621	END SELECT
3622
3623
3624	! 3. North and south directions
3625	! -----------------------------
3626	! always closed : we play only with the neigbours
3627	!
3628	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
3629	ijhom = nlcj-nrecj-jprj
3630	DO jl = 1, iprecj
3631	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
3632	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
3633	END DO
3634	ENDIF
3635	!
3636	! ! Migrations
3637	imigr = iprecj * ( jpi + 2*jpri )
3638	!
3639	SELECT CASE ( nbondj )
3640	CASE ( -1 )
3641	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
3642	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3643	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3644	CASE ( 0 )
3645	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3646	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
3647	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3648	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3649	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3650	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3651	CASE ( 1 )
3652	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3653	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3654	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3655	END SELECT
3656	!
3657	! ! Write Dirichlet lateral conditions
3658	ijhom = nlcj - jprecj
3659	!
3660	SELECT CASE ( nbondj )
3661	CASE ( -1 )
3662	DO jl = 1, iprecj
3663	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
3664	END DO
3665	CASE ( 0 )
3666	DO jl = 1, iprecj
3667	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3668	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
3669	END DO
3670	CASE ( 1 )
3671	DO jl = 1, iprecj
3672	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3673	END DO
3674	END SELECT
3675
3676	END SUBROUTINE mpp_lnk_2d_icb
3677	#else
3678	!!----------------------------------------------------------------------
3679	!! Default case: Dummy module share memory computing
3680	!!----------------------------------------------------------------------
3681	USE in_out_manager
3682
3683	INTERFACE mpp_sum
3684	MODULE PROCEDURE mpp_sum_a2s, mpp_sum_as, mpp_sum_ai, mpp_sum_s, mpp_sum_i, mppsum_realdd, mppsum_a_realdd
3685	END INTERFACE
3686	INTERFACE mpp_max
3687	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
3688	END INTERFACE
3689	INTERFACE mpp_min
3690	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
3691	END INTERFACE
3692	INTERFACE mpp_minloc
3693	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
3694	END INTERFACE
3695	INTERFACE mpp_maxloc
3696	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
3697	END INTERFACE
3698
3699	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .FALSE. !: mpp flag
3700	LOGICAL, PUBLIC :: ln_nnogather !: namelist control of northfold comms (needed here in case "key_mpp_mpi" is not used)
3701	INTEGER :: ncomm_ice
3702	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
3703	!!----------------------------------------------------------------------
3704	CONTAINS
3705
3706	INTEGER FUNCTION lib_mpp_alloc(kumout) ! Dummy function
3707	INTEGER, INTENT(in) :: kumout
3708	lib_mpp_alloc = 0
3709	END FUNCTION lib_mpp_alloc
3710
3711	FUNCTION mynode( ldtxt, ldname, kumnam_ref, knumnam_cfg, kumond , kstop, localComm ) RESULT (function_value)
3712	INTEGER, OPTIONAL , INTENT(in ) :: localComm
3713	CHARACTER(len=*),DIMENSION(:) :: ldtxt
3714	CHARACTER(len=*) :: ldname
3715	INTEGER :: kumnam_ref, knumnam_cfg , kumond , kstop
3716	IF( PRESENT( localComm ) ) mpi_comm_opa = localComm
3717	function_value = 0
3718	IF( .FALSE. ) ldtxt(:) = 'never done'
3719	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
3720	END FUNCTION mynode
3721
3722	SUBROUTINE mppsync ! Dummy routine
3723	END SUBROUTINE mppsync
3724
3725	SUBROUTINE mpp_sum_as( parr, kdim, kcom ) ! Dummy routine
3726	REAL , DIMENSION(:) :: parr
3727	INTEGER :: kdim
3728	INTEGER, OPTIONAL :: kcom
3729	WRITE(,) 'mpp_sum_as: You should not have seen this print! error?', kdim, parr(1), kcom
3730	END SUBROUTINE mpp_sum_as
3731
3732	SUBROUTINE mpp_sum_a2s( parr, kdim, kcom ) ! Dummy routine
3733	REAL , DIMENSION(:,:) :: parr
3734	INTEGER :: kdim
3735	INTEGER, OPTIONAL :: kcom
3736	WRITE(,) 'mpp_sum_a2s: You should not have seen this print! error?', kdim, parr(1,1), kcom
3737	END SUBROUTINE mpp_sum_a2s
3738
3739	SUBROUTINE mpp_sum_ai( karr, kdim, kcom ) ! Dummy routine
3740	INTEGER, DIMENSION(:) :: karr
3741	INTEGER :: kdim
3742	INTEGER, OPTIONAL :: kcom
3743	WRITE(,) 'mpp_sum_ai: You should not have seen this print! error?', kdim, karr(1), kcom
3744	END SUBROUTINE mpp_sum_ai
3745
3746	SUBROUTINE mpp_sum_s( psca, kcom ) ! Dummy routine
3747	REAL :: psca
3748	INTEGER, OPTIONAL :: kcom
3749	WRITE(,) 'mpp_sum_s: You should not have seen this print! error?', psca, kcom
3750	END SUBROUTINE mpp_sum_s
3751
3752	SUBROUTINE mpp_sum_i( kint, kcom ) ! Dummy routine
3753	integer :: kint
3754	INTEGER, OPTIONAL :: kcom
3755	WRITE(,) 'mpp_sum_i: You should not have seen this print! error?', kint, kcom
3756	END SUBROUTINE mpp_sum_i
3757
3758	SUBROUTINE mppsum_realdd( ytab, kcom )
3759	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
3760	INTEGER , INTENT( in ), OPTIONAL :: kcom
3761	WRITE(,) 'mppsum_realdd: You should not have seen this print! error?', ytab
3762	END SUBROUTINE mppsum_realdd
3763
3764	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
3765	INTEGER , INTENT( in ) :: kdim ! size of ytab
3766	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
3767	INTEGER , INTENT( in ), OPTIONAL :: kcom
3768	WRITE(,) 'mppsum_a_realdd: You should not have seen this print! error?', kdim, ytab(1), kcom
3769	END SUBROUTINE mppsum_a_realdd
3770
3771	SUBROUTINE mppmax_a_real( parr, kdim, kcom )
3772	REAL , DIMENSION(:) :: parr
3773	INTEGER :: kdim
3774	INTEGER, OPTIONAL :: kcom
3775	WRITE(,) 'mppmax_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3776	END SUBROUTINE mppmax_a_real
3777
3778	SUBROUTINE mppmax_real( psca, kcom )
3779	REAL :: psca
3780	INTEGER, OPTIONAL :: kcom
3781	WRITE(,) 'mppmax_real: You should not have seen this print! error?', psca, kcom
3782	END SUBROUTINE mppmax_real
3783
3784	SUBROUTINE mppmin_a_real( parr, kdim, kcom )
3785	REAL , DIMENSION(:) :: parr
3786	INTEGER :: kdim
3787	INTEGER, OPTIONAL :: kcom
3788	WRITE(,) 'mppmin_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3789	END SUBROUTINE mppmin_a_real
3790
3791	SUBROUTINE mppmin_real( psca, kcom )
3792	REAL :: psca
3793	INTEGER, OPTIONAL :: kcom
3794	WRITE(,) 'mppmin_real: You should not have seen this print! error?', psca, kcom
3795	END SUBROUTINE mppmin_real
3796
3797	SUBROUTINE mppmax_a_int( karr, kdim ,kcom)
3798	INTEGER, DIMENSION(:) :: karr
3799	INTEGER :: kdim
3800	INTEGER, OPTIONAL :: kcom
3801	WRITE(,) 'mppmax_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3802	END SUBROUTINE mppmax_a_int
3803
3804	SUBROUTINE mppmax_int( kint, kcom)
3805	INTEGER :: kint
3806	INTEGER, OPTIONAL :: kcom
3807	WRITE(,) 'mppmax_int: You should not have seen this print! error?', kint, kcom
3808	END SUBROUTINE mppmax_int
3809
3810	SUBROUTINE mppmin_a_int( karr, kdim, kcom )
3811	INTEGER, DIMENSION(:) :: karr
3812	INTEGER :: kdim
3813	INTEGER, OPTIONAL :: kcom
3814	WRITE(,) 'mppmin_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3815	END SUBROUTINE mppmin_a_int
3816
3817	SUBROUTINE mppmin_int( kint, kcom )
3818	INTEGER :: kint
3819	INTEGER, OPTIONAL :: kcom
3820	WRITE(,) 'mppmin_int: You should not have seen this print! error?', kint, kcom
3821	END SUBROUTINE mppmin_int
3822
3823	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki, kj )
3824	REAL :: pmin
3825	REAL , DIMENSION (:,:) :: ptab, pmask
3826	INTEGER :: ki, kj
3827	WRITE(,) 'mpp_minloc2d: You should not have seen this print! error?', pmin, ki, kj, ptab(1,1), pmask(1,1)
3828	END SUBROUTINE mpp_minloc2d
3829
3830	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj, kk )
3831	REAL :: pmin
3832	REAL , DIMENSION (:,:,:) :: ptab, pmask
3833	INTEGER :: ki, kj, kk
3834	WRITE(,) 'mpp_minloc3d: You should not have seen this print! error?', pmin, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3835	END SUBROUTINE mpp_minloc3d
3836
3837	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
3838	REAL :: pmax
3839	REAL , DIMENSION (:,:) :: ptab, pmask
3840	INTEGER :: ki, kj
3841	WRITE(,) 'mpp_maxloc2d: You should not have seen this print! error?', pmax, ki, kj, ptab(1,1), pmask(1,1)
3842	END SUBROUTINE mpp_maxloc2d
3843
3844	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
3845	REAL :: pmax
3846	REAL , DIMENSION (:,:,:) :: ptab, pmask
3847	INTEGER :: ki, kj, kk
3848	WRITE(,) 'mpp_maxloc3d: You should not have seen this print! error?', pmax, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3849	END SUBROUTINE mpp_maxloc3d
3850
3851	SUBROUTINE mppstop
3852	STOP ! non MPP case, just stop the run
3853	END SUBROUTINE mppstop
3854
3855	SUBROUTINE mpp_ini_ice( kcom, knum )
3856	INTEGER :: kcom, knum
3857	WRITE(,) 'mpp_ini_ice: You should not have seen this print! error?', kcom, knum
3858	END SUBROUTINE mpp_ini_ice
3859
3860	SUBROUTINE mpp_ini_znl( knum )
3861	INTEGER :: knum
3862	WRITE(,) 'mpp_ini_znl: You should not have seen this print! error?', knum
3863	END SUBROUTINE mpp_ini_znl
3864
3865	SUBROUTINE mpp_comm_free( kcom )
3866	INTEGER :: kcom
3867	WRITE(,) 'mpp_comm_free: You should not have seen this print! error?', kcom
3868	END SUBROUTINE mpp_comm_free
3869	#endif
3870
3871	!!----------------------------------------------------------------------
3872	!! All cases: ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam routines
3873	!!----------------------------------------------------------------------
3874
3875	SUBROUTINE ctl_stop( cd1, cd2, cd3, cd4, cd5 , &
3876	& cd6, cd7, cd8, cd9, cd10 )
3877	!!----------------------------------------------------------------------
3878	!! * ROUTINE stop_opa *
3879	!!
3880	!! ** Purpose : print in ocean.outpput file a error message and
3881	!! increment the error number (nstop) by one.
3882	!!----------------------------------------------------------------------
3883	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3884	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3885	!!----------------------------------------------------------------------
3886	!
3887	nstop = nstop + 1
3888	IF(lwp) THEN
3889	WRITE(numout,cform_err)
3890	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3891	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3892	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3893	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3894	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3895	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3896	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3897	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3898	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3899	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3900	ENDIF
3901	CALL FLUSH(numout )
3902	IF( numstp /= -1 ) CALL FLUSH(numstp )
3903	IF( numsol /= -1 ) CALL FLUSH(numsol )
3904	IF( numevo_ice /= -1 ) CALL FLUSH(numevo_ice)
3905	!
3906	IF( cd1 == 'MPPSTOP' ) THEN
3907	IF(lwp) WRITE(numout,*) 'E R R O R: Calling mppstop'
3908	CALL mppstop()
3909	ENDIF
3910	IF( cd1 == 'STOP' ) THEN
3911	IF(lwp) WRITE(numout,*) 'huge E-R-R-O-R : immediate stop'
3912	CALL mppstop()
3913	ENDIF
3914	!
3915	END SUBROUTINE ctl_stop
3916
3917
3918	SUBROUTINE ctl_warn( cd1, cd2, cd3, cd4, cd5, &
3919	& cd6, cd7, cd8, cd9, cd10 )
3920	!!----------------------------------------------------------------------
3921	!! * ROUTINE stop_warn *
3922	!!
3923	!! ** Purpose : print in ocean.outpput file a error message and
3924	!! increment the warning number (nwarn) by one.
3925	!!----------------------------------------------------------------------
3926	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3927	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3928	!!----------------------------------------------------------------------
3929	!
3930	nwarn = nwarn + 1
3931	IF(lwp) THEN
3932	WRITE(numout,cform_war)
3933	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3934	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3935	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3936	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3937	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3938	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3939	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3940	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3941	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3942	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3943	ENDIF
3944	CALL FLUSH(numout)
3945	!
3946	END SUBROUTINE ctl_warn
3947
3948
3949	SUBROUTINE ctl_opn( knum, cdfile, cdstat, cdform, cdacce, klengh, kout, ldwp, karea )
3950	!!----------------------------------------------------------------------
3951	!! * ROUTINE ctl_opn *
3952	!!
3953	!! ** Purpose : Open file and check if required file is available.
3954	!!
3955	!! ** Method : Fortan open
3956	!!----------------------------------------------------------------------
3957	INTEGER , INTENT( out) :: knum ! logical unit to open
3958	CHARACTER(len=*) , INTENT(in ) :: cdfile ! file name to open
3959	CHARACTER(len=*) , INTENT(in ) :: cdstat ! disposition specifier
3960	CHARACTER(len=*) , INTENT(in ) :: cdform ! formatting specifier
3961	CHARACTER(len=*) , INTENT(in ) :: cdacce ! access specifier
3962	INTEGER , INTENT(in ) :: klengh ! record length
3963	INTEGER , INTENT(in ) :: kout ! number of logical units for write
3964	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
3965	INTEGER, OPTIONAL, INTENT(in ) :: karea ! proc number
3966	!!
3967	CHARACTER(len=80) :: clfile
3968	INTEGER :: iost
3969	!!----------------------------------------------------------------------
3970
3971	! adapt filename
3972	! ----------------
3973	clfile = TRIM(cdfile)
3974	IF( PRESENT( karea ) ) THEN
3975	IF( karea > 1 ) WRITE(clfile, "(a,'_',i4.4)") TRIM(clfile), karea-1
3976	ENDIF
3977	#if defined key_agrif
3978	IF( .NOT. Agrif_Root() ) clfile = TRIM(Agrif_CFixed())//'_'//TRIM(clfile)
3979	knum=Agrif_Get_Unit()
3980	#else
3981	knum=get_unit()
3982	#endif
3983
3984	iost=0
3985	IF( cdacce(1:6) == 'DIRECT' ) THEN
3986	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat, RECL=klengh, ERR=100, IOSTAT=iost )
3987	ELSE
3988	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat , ERR=100, IOSTAT=iost )
3989	ENDIF
3990	IF( iost == 0 ) THEN
3991	IF(ldwp) THEN
3992	IF(nprint > 0) WRITE(kout,*) ' file : ', clfile,' open ok'
3993	IF(nprint > 2) THEN
3994	WRITE(kout,*) ' unit = ', knum
3995	WRITE(kout,*) ' status = ', cdstat
3996	WRITE(kout,*) ' form = ', cdform
3997	WRITE(kout,*) ' access = ', cdacce
3998	ENDIF
3999	WRITE(kout,*)
4000	ENDIF
4001	ENDIF
4002	100 CONTINUE
4003	IF( iost /= 0 ) THEN
4004	IF(ldwp) THEN
4005	WRITE(kout,*)
4006	WRITE(kout,*) ' ===>>>> : bad opening file: ', clfile
4007	WRITE(kout,*) ' ======= === '
4008	WRITE(kout,*) ' unit = ', knum
4009	WRITE(kout,*) ' status = ', cdstat
4010	WRITE(kout,*) ' form = ', cdform
4011	WRITE(kout,*) ' access = ', cdacce
4012	WRITE(kout,*) ' iostat = ', iost
4013	WRITE(kout,*) ' we stop. verify the file '
4014	WRITE(kout,*)
4015	ENDIF
4016	CALL ctl_stop ('STOP', 'NEMO abort ctl_opn bad opening')
4017	ENDIF
4018
4019	END SUBROUTINE ctl_opn
4020
4021	SUBROUTINE ctl_nam ( kios, cdnam, ldwp )
4022	!!----------------------------------------------------------------------
4023	!! * ROUTINE ctl_nam *
4024	!!
4025	!! ** Purpose : Informations when error while reading a namelist
4026	!!
4027	!! ** Method : Fortan open
4028	!!----------------------------------------------------------------------
4029	INTEGER , INTENT(inout) :: kios ! IO status after reading the namelist
4030	CHARACTER(len=*) , INTENT(in ) :: cdnam ! group name of namelist for which error occurs
4031	CHARACTER(len=4) :: clios ! string to convert iostat in character for print
4032	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
4033	!!----------------------------------------------------------------------
4034
4035	!
4036	! ----------------
4037	WRITE (clios, '(I4.0)') kios
4038	IF( kios < 0 ) THEN
4039	CALL ctl_warn( 'W A R N I N G: end of record or file while reading namelist ' &
4040	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
4041	ENDIF
4042
4043	IF( kios > 0 ) THEN
4044	CALL ctl_stop( 'E R R O R : misspelled variable in namelist ' &
4045	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
4046	ENDIF
4047	kios = 0
4048	RETURN
4049
4050	END SUBROUTINE ctl_nam
4051
4052	INTEGER FUNCTION get_unit()
4053	!!----------------------------------------------------------------------
4054	!! * FUNCTION get_unit *
4055	!!
4056	!! ** Purpose : return the index of an unused logical unit
4057	!!----------------------------------------------------------------------
4058	LOGICAL :: llopn
4059	!!----------------------------------------------------------------------
4060	!
4061	get_unit = 15 ! choose a unit that is big enough then it is not already used in NEMO
4062	llopn = .TRUE.
4063	DO WHILE( (get_unit < 998) .AND. llopn )
4064	get_unit = get_unit + 1
4065	INQUIRE( unit = get_unit, opened = llopn )
4066	END DO
4067	IF( (get_unit == 999) .AND. llopn ) THEN
4068	CALL ctl_stop( 'get_unit: All logical units until 999 are used...' )
4069	get_unit = -1
4070	ENDIF
4071	!
4072	END FUNCTION get_unit
4073
4074	!!----------------------------------------------------------------------
4075	END MODULE lib_mpp

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source: branches/UKMO/dev_r5518_GO6_starthour_obsoper/NEMOGCM/NEMO/OPA_SRC/LBC/lib_mpp.F90 @ 13531

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