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lib_mpp.F90

Last change on this file was 7985, checked in by frrh, 7 years ago

Met Office GMED ticket 322 refers.
Apply updates the Met Office GC3 coupled package branch in order to
accommodate developments under GMED ticket 320 which insert long
standing missing revisions of the nemo_v3_6_STABLE branch
to the Met Office GO6 package branch.

These changes are not dependent on a particular revision of the GO6
package branch and may be used with or without upgrading that branch.

File size: 164.6 KB

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

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source: branches/UKMO/dev_r5518_GC3_couple_pkg/NEMOGCM/NEMO/OPA_SRC/LBC/lib_mpp.F90

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