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source: CONFIG/UNIFORM/v6/IPSLCM5A2/SOURCES/NEMO/lib_mpp.F90 @ 3949

Last change on this file since 3949 was 3949, checked in by aclsce, 6 years ago
Added configuration files to run oasis and nemo on irene for IPSLCM5A2.1 configuration
File size: 173.0 KB

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1	MODULE lib_mpp
2	!!======================================================================
3	!! * MODULE lib_mpp *
4	!! Ocean numerics: massively parallel processing library
5	!!=====================================================================
6	!! History : OPA ! 1994 (M. Guyon, J. Escobar, M. Imbard) Original code
7	!! 7.0 ! 1997 (A.M. Treguier) SHMEM additions
8	!! 8.0 ! 1998 (M. Imbard, J. Escobar, L. Colombet ) SHMEM and MPI
9	!! ! 1998 (J.M. Molines) Open boundary conditions
10	!! NEMO 1.0 ! 2003 (J.-M. Molines, G. Madec) F90, free form
11	!! ! 2003 (J.M. Molines) add mpp_ini_north(_3d,_2d)
12	!! - ! 2004 (R. Bourdalle Badie) isend option in mpi
13	!! ! 2004 (J.M. Molines) minloc, maxloc
14	!! - ! 2005 (G. Madec, S. Masson) npolj=5,6 F-point & ice cases
15	!! - ! 2005 (R. Redler) Replacement of MPI_COMM_WORLD except for MPI_Abort
16	!! - ! 2005 (R. Benshila, G. Madec) add extra halo case
17	!! - ! 2008 (R. Benshila) add mpp_ini_ice
18	!! 3.2 ! 2009 (R. Benshila) SHMEM suppression, north fold in lbc_nfd
19	!! 3.2 ! 2009 (O. Marti) add mpp_ini_znl
20	!! 4.0 ! 2011 (G. Madec) move ctl_ routines from in_out_manager
21	!! 3.5 ! 2012 (S.Mocavero, I. Epicoco) Add 'mpp_lnk_bdy_3d', 'mpp_lnk_obc_3d',
22	!! 'mpp_lnk_bdy_2d' and 'mpp_lnk_obc_2d' routines and update
23	!! the mppobc routine to optimize the BDY and OBC communications
24	!! 3.5 ! 2013 ( C. Ethe, G. Madec ) message passing arrays as local variables
25	!! 3.5 ! 2013 (S.Mocavero, I.Epicoco - CMCC) north fold optimizations
26	!! 3.6 ! 2015 (O. TintÃ³ and M. Castrillo - BSC) Added 'mpp_lnk_2d_multiple', 'mpp_lbc_north_2d_multiple', 'mpp_max_multiple'
27	!!----------------------------------------------------------------------
28
29	!!----------------------------------------------------------------------
30	!! ctl_stop : update momentum and tracer Kz from a tke scheme
31	!! ctl_warn : initialization, namelist read, and parameters control
32	!! ctl_opn : Open file and check if required file is available.
33	!! ctl_nam : Prints informations when an error occurs while reading a namelist
34	!! get_unit : give the index of an unused logical unit
35	!!----------------------------------------------------------------------
36	#if defined key_mpp_mpi
37	!!----------------------------------------------------------------------
38	!! 'key_mpp_mpi' MPI massively parallel processing library
39	!!----------------------------------------------------------------------
40	!! lib_mpp_alloc : allocate mpp arrays
41	!! mynode : indentify the processor unit
42	!! mpp_lnk : interface (defined in lbclnk) for message passing of 2d or 3d arrays (mpp_lnk_2d, mpp_lnk_3d)
43	!! mpp_lnk_3d_gather : Message passing manadgement for two 3D arrays
44	!! mpp_lnk_e : interface (defined in lbclnk) for message passing of 2d array with extra halo (mpp_lnk_2d_e)
45	!! mpp_lnk_icb : interface for message passing of 2d arrays with extra halo for icebergs (mpp_lnk_2d_icb)
46	!! mpprecv :
47	!! mppsend : SUBROUTINE mpp_ini_znl
48	!! mppscatter :
49	!! mppgather :
50	!! mpp_min : generic interface for mppmin_int , mppmin_a_int , mppmin_real, mppmin_a_real
51	!! mpp_max : generic interface for mppmax_int , mppmax_a_int , mppmax_real, mppmax_a_real
52	!! mpp_sum : generic interface for mppsum_int , mppsum_a_int , mppsum_real, mppsum_a_real
53	!! mpp_minloc :
54	!! mpp_maxloc :
55	!! mppsync :
56	!! mppstop :
57	!! mpp_ini_north : initialisation of north fold
58	!! mpp_lbc_north : north fold processors gathering
59	!! mpp_lbc_north_e : variant of mpp_lbc_north for extra outer halo
60	!! mpp_lbc_north_icb : variant of mpp_lbc_north for extra outer halo with icebergs
61	!!----------------------------------------------------------------------
62	USE dom_oce ! ocean space and time domain
63	USE lbcnfd ! north fold treatment
64	USE in_out_manager ! I/O manager
65	USE wrk_nemo ! work arrays
66
67	IMPLICIT NONE
68	PRIVATE
69
70	PUBLIC ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam
71	PUBLIC mynode, mppstop, mppsync, mpp_comm_free
72	PUBLIC mpp_ini_north, mpp_lbc_north, mpp_lbc_north_e
73	PUBLIC mpp_min, mpp_max, mpp_sum, mpp_minloc, mpp_maxloc
74	PUBLIC mpp_max_multiple
75	PUBLIC mpp_lnk_3d, mpp_lnk_3d_gather, mpp_lnk_2d, mpp_lnk_2d_e
76	PUBLIC mpp_lnk_2d_9 , mpp_lnk_2d_multiple
77	PUBLIC mppscatter, mppgather
78	PUBLIC mpp_ini_ice, mpp_ini_znl
79	PUBLIC mppsize
80	PUBLIC mppsend, mpprecv ! needed by TAM and ICB routines
81	PUBLIC mpp_lnk_bdy_2d, mpp_lnk_bdy_3d
82	PUBLIC mpp_lbc_north_icb, mpp_lnk_2d_icb
83	PUBLIC mpprank
84
85	TYPE arrayptr
86	REAL , DIMENSION (:,:), POINTER :: pt2d
87	END TYPE arrayptr
88	PUBLIC arrayptr
89
90	!! * Interfaces
91	!! define generic interface for these routine as they are called sometimes
92	!! with scalar arguments instead of array arguments, which causes problems
93	!! for the compilation on AIX system as well as NEC and SGI. Ok on COMPACQ
94	INTERFACE mpp_min
95	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
96	END INTERFACE
97	INTERFACE mpp_max
98	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
99	END INTERFACE
100	INTERFACE mpp_sum
101	MODULE PROCEDURE mppsum_a_int, mppsum_int, mppsum_a_real, mppsum_real, &
102	mppsum_realdd, mppsum_a_realdd
103	END INTERFACE
104	INTERFACE mpp_lbc_north
105	MODULE PROCEDURE mpp_lbc_north_3d, mpp_lbc_north_2d
106	END INTERFACE
107	INTERFACE mpp_minloc
108	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
109	END INTERFACE
110	INTERFACE mpp_maxloc
111	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
112	END INTERFACE
113
114	INTERFACE mpp_max_multiple
115	MODULE PROCEDURE mppmax_real_multiple
116	END INTERFACE
117
118	!! ========================= !!
119	!! MPI variable definition !!
120	!! ========================= !!
121	!$AGRIF_DO_NOT_TREAT
122	INCLUDE 'mpif.h'
123	!$AGRIF_END_DO_NOT_TREAT
124
125	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .TRUE. !: mpp flag
126
127	INTEGER, PARAMETER :: nprocmax = 2**10 ! maximun dimension (required to be a power of 2)
128
129	INTEGER :: mppsize ! number of process
130	INTEGER :: mpprank ! process number [ 0 - size-1 ]
131	!$AGRIF_DO_NOT_TREAT
132	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
133	!$AGRIF_END_DO_NOT_TREAT
134
135	INTEGER :: MPI_SUMDD
136
137	! variables used in case of sea-ice
138	INTEGER, PUBLIC :: ncomm_ice !: communicator made by the processors with sea-ice (public so that it can be freed in limthd)
139	INTEGER :: ngrp_iworld ! group ID for the world processors (for rheology)
140	INTEGER :: ngrp_ice ! group ID for the ice processors (for rheology)
141	INTEGER :: ndim_rank_ice ! number of 'ice' processors
142	INTEGER :: n_ice_root ! number (in the comm_ice) of proc 0 in the ice comm
143	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_ice ! dimension ndim_rank_ice
144
145	! variables used for zonal integration
146	INTEGER, PUBLIC :: ncomm_znl !: communicator made by the processors on the same zonal average
147	LOGICAL, PUBLIC :: l_znl_root ! True on the 'left'most processor on the same row
148	INTEGER :: ngrp_znl ! group ID for the znl processors
149	INTEGER :: ndim_rank_znl ! number of processors on the same zonal average
150	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE :: nrank_znl ! dimension ndim_rank_znl, number of the procs into the same znl domain
151
152	! North fold condition in mpp_mpi with jpni > 1 (PUBLIC for TAM)
153	INTEGER, PUBLIC :: ngrp_world ! group ID for the world processors
154	INTEGER, PUBLIC :: ngrp_opa ! group ID for the opa processors
155	INTEGER, PUBLIC :: ngrp_north ! group ID for the northern processors (to be fold)
156	INTEGER, PUBLIC :: ncomm_north ! communicator made by the processors belonging to ngrp_north
157	INTEGER, PUBLIC :: ndim_rank_north ! number of 'sea' processor in the northern line (can be /= jpni !)
158	INTEGER, PUBLIC :: njmppmax ! value of njmpp for the processors of the northern line
159	INTEGER, PUBLIC :: north_root ! number (in the comm_opa) of proc 0 in the northern comm
160	INTEGER, DIMENSION(:), ALLOCATABLE, SAVE, PUBLIC :: nrank_north ! dimension ndim_rank_north
161
162	! Type of send : standard, buffered, immediate
163	CHARACTER(len=1), PUBLIC :: cn_mpi_send ! type od mpi send/recieve (S=standard, B=bsend, I=isend)
164	LOGICAL, PUBLIC :: l_isend = .FALSE. ! isend use indicator (T if cn_mpi_send='I')
165	INTEGER, PUBLIC :: nn_buffer ! size of the buffer in case of mpi_bsend
166
167	REAL(wp), DIMENSION(:), ALLOCATABLE, SAVE :: tampon ! buffer in case of bsend
168
169	LOGICAL, PUBLIC :: ln_nnogather ! namelist control of northfold comms
170	LOGICAL, PUBLIC :: l_north_nogather = .FALSE. ! internal control of northfold comms
171	INTEGER, PUBLIC :: ityp
172	!!----------------------------------------------------------------------
173	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
174	!! $Id: lib_mpp.F90 8537 2017-09-19 05:46:09Z gm $
175	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
176	!!----------------------------------------------------------------------
177	CONTAINS
178
179
180	FUNCTION mynode( ldtxt, ldname, kumnam_ref , kumnam_cfg , kumond , kstop, localComm )
181	!!----------------------------------------------------------------------
182	!! * routine mynode *
183	!!
184	!! ** Purpose : Find processor unit
185	!!----------------------------------------------------------------------
186	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
187	CHARACTER(len=*) , INTENT(in ) :: ldname
188	INTEGER , INTENT(in ) :: kumnam_ref ! logical unit for reference namelist
189	INTEGER , INTENT(in ) :: kumnam_cfg ! logical unit for configuration namelist
190	INTEGER , INTENT(inout) :: kumond ! logical unit for namelist output
191	INTEGER , INTENT(inout) :: kstop ! stop indicator
192	INTEGER, OPTIONAL , INTENT(in ) :: localComm
193	!
194	INTEGER :: mynode, ierr, code, ji, ii, ios
195	LOGICAL :: mpi_was_called
196	!
197	NAMELIST/nammpp/ cn_mpi_send, nn_buffer, jpni, jpnj, jpnij, ln_nnogather
198	!!----------------------------------------------------------------------
199	!
200	ii = 1
201	WRITE(ldtxt(ii),*) ; ii = ii + 1
202	WRITE(ldtxt(ii),*) 'mynode : mpi initialisation' ; ii = ii + 1
203	WRITE(ldtxt(ii),*) '~~~~~~ ' ; ii = ii + 1
204	!
205
206	REWIND( kumnam_ref ) ! Namelist nammpp in reference namelist: mpi variables
207	READ ( kumnam_ref, nammpp, IOSTAT = ios, ERR = 901)
208	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in reference namelist', lwp )
209
210	REWIND( kumnam_cfg ) ! Namelist nammpp in configuration namelist: mpi variables
211	READ ( kumnam_cfg, nammpp, IOSTAT = ios, ERR = 902 )
212	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nammpp in configuration namelist', lwp )
213
214	! ! control print
215	WRITE(ldtxt(ii),*) ' Namelist nammpp' ; ii = ii + 1
216	WRITE(ldtxt(ii),*) ' mpi send type cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
217	WRITE(ldtxt(ii),*) ' size in bytes of exported buffer nn_buffer = ', nn_buffer ; ii = ii + 1
218
219	#if defined key_agrif
220	IF( .NOT. Agrif_Root() ) THEN
221	jpni = Agrif_Parent(jpni )
222	jpnj = Agrif_Parent(jpnj )
223	jpnij = Agrif_Parent(jpnij)
224	ENDIF
225	#endif
226
227	IF(jpnij < 1)THEN
228	! If jpnij is not specified in namelist then we calculate it - this
229	! means there will be no land cutting out.
230	jpnij = jpni * jpnj
231	END IF
232
233	IF( (jpni < 1) .OR. (jpnj < 1) )THEN
234	WRITE(ldtxt(ii),*) ' jpni, jpnj and jpnij will be calculated automatically'; ii = ii + 1
235	ELSE
236	WRITE(ldtxt(ii),*) ' processor grid extent in i jpni = ',jpni; ii = ii + 1
237	WRITE(ldtxt(ii),*) ' processor grid extent in j jpnj = ',jpnj; ii = ii + 1
238	WRITE(ldtxt(ii),*) ' number of local domains jpnij = ',jpnij; ii = ii +1
239	END IF
240
241	WRITE(ldtxt(ii),*) ' avoid use of mpi_allgather at the north fold ln_nnogather = ', ln_nnogather ; ii = ii + 1
242
243	CALL mpi_initialized ( mpi_was_called, code )
244	IF( code /= MPI_SUCCESS ) THEN
245	DO ji = 1, SIZE(ldtxt)
246	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
247	END DO
248	WRITE(*, cform_err)
249	WRITE(, ) 'lib_mpp: Error in routine mpi_initialized'
250	CALL mpi_abort( mpi_comm_world, code, ierr )
251	ENDIF
252
253	IF( mpi_was_called ) THEN
254	!
255	SELECT CASE ( cn_mpi_send )
256	CASE ( 'S' ) ! Standard mpi send (blocking)
257	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
258	CASE ( 'B' ) ! Buffer mpi send (blocking)
259	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
260	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
261	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
262	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
263	l_isend = .TRUE.
264	CASE DEFAULT
265	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
266	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
267	kstop = kstop + 1
268	END SELECT
269	ELSE IF ( PRESENT(localComm) .and. .not. mpi_was_called ) THEN
270	WRITE(ldtxt(ii),*) ' lib_mpp: You cannot provide a local communicator ' ; ii = ii + 1
271	WRITE(ldtxt(ii),*) ' without calling MPI_Init before ! ' ; ii = ii + 1
272	kstop = kstop + 1
273	ELSE
274	SELECT CASE ( cn_mpi_send )
275	CASE ( 'S' ) ! Standard mpi send (blocking)
276	WRITE(ldtxt(ii),*) ' Standard blocking mpi send (send)' ; ii = ii + 1
277	CALL mpi_init( ierr )
278	CASE ( 'B' ) ! Buffer mpi send (blocking)
279	WRITE(ldtxt(ii),*) ' Buffer blocking mpi send (bsend)' ; ii = ii + 1
280	IF( Agrif_Root() ) CALL mpi_init_opa( ldtxt, ii, ierr )
281	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
282	WRITE(ldtxt(ii),*) ' Immediate non-blocking send (isend)' ; ii = ii + 1
283	l_isend = .TRUE.
284	CALL mpi_init( ierr )
285	CASE DEFAULT
286	WRITE(ldtxt(ii),cform_err) ; ii = ii + 1
287	WRITE(ldtxt(ii),*) ' bad value for cn_mpi_send = ', cn_mpi_send ; ii = ii + 1
288	kstop = kstop + 1
289	END SELECT
290	!
291	ENDIF
292
293	IF( PRESENT(localComm) ) THEN
294	IF( Agrif_Root() ) THEN
295	mpi_comm_opa = localComm
296	ENDIF
297	ELSE
298	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code)
299	IF( code /= MPI_SUCCESS ) THEN
300	DO ji = 1, SIZE(ldtxt)
301	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
302	END DO
303	WRITE(*, cform_err)
304	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
305	CALL mpi_abort( mpi_comm_world, code, ierr )
306	ENDIF
307	ENDIF
308
309	#if defined key_agrif
310	IF (Agrif_Root()) THEN
311	CALL Agrif_MPI_Init(mpi_comm_opa)
312	ELSE
313	CALL Agrif_MPI_set_grid_comm(mpi_comm_opa)
314	ENDIF
315	#endif
316
317	CALL mpi_comm_rank( mpi_comm_opa, mpprank, ierr )
318	CALL mpi_comm_size( mpi_comm_opa, mppsize, ierr )
319	mynode = mpprank
320
321	IF( mynode == 0 ) THEN
322	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
323	WRITE(kumond, nammpp)
324	ENDIF
325	!
326	CALL MPI_OP_CREATE(DDPDD_MPI, .TRUE., MPI_SUMDD, ierr)
327	!
328	END FUNCTION mynode
329
330	SUBROUTINE mpp_lnk_3d( ptab, cd_type, psgn, cd_mpp, pval )
331	!!----------------------------------------------------------------------
332	!! * routine mpp_lnk_3d *
333	!!
334	!! ** Purpose : Message passing manadgement
335	!!
336	!! ** Method : Use mppsend and mpprecv function for passing mask
337	!! between processors following neighboring subdomains.
338	!! domain parameters
339	!! nlci : first dimension of the local subdomain
340	!! nlcj : second dimension of the local subdomain
341	!! nbondi : mark for "east-west local boundary"
342	!! nbondj : mark for "north-south local boundary"
343	!! noea : number for local neighboring processors
344	!! nowe : number for local neighboring processors
345	!! noso : number for local neighboring processors
346	!! nono : number for local neighboring processors
347	!!
348	!! ** Action : ptab with update value at its periphery
349	!!
350	!!----------------------------------------------------------------------
351	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
352	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
353	! ! = T , U , V , F , W points
354	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
355	! ! = 1. , the sign is kept
356	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
357	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
358	!!
359	INTEGER :: ji, jj, jk, jl ! dummy loop indices
360	INTEGER :: imigr, iihom, ijhom ! temporary integers
361	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
362	REAL(wp) :: zland
363	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
364	!
365	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
366	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
367
368	!!----------------------------------------------------------------------
369
370	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
371	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
372
373	!
374	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
375	ELSE ; zland = 0.e0 ! zero by default
376	ENDIF
377
378	! 1. standard boundary treatment
379	! ------------------------------
380	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
381	!
382	! WARNING ptab is defined only between nld and nle
383	DO jk = 1, jpk
384	DO jj = nlcj+1, jpj ! added line(s) (inner only)
385	ptab(nldi :nlei , jj ,jk) = ptab(nldi:nlei, nlej,jk)
386	ptab(1 :nldi-1, jj ,jk) = ptab(nldi , nlej,jk)
387	ptab(nlei+1:nlci , jj ,jk) = ptab( nlei, nlej,jk)
388	END DO
389	DO ji = nlci+1, jpi ! added column(s) (full)
390	ptab(ji ,nldj :nlej ,jk) = ptab( nlei,nldj:nlej,jk)
391	ptab(ji ,1 :nldj-1,jk) = ptab( nlei,nldj ,jk)
392	ptab(ji ,nlej+1:jpj ,jk) = ptab( nlei, nlej,jk)
393	END DO
394	END DO
395	!
396	ELSE ! standard close or cyclic treatment
397	!
398	! ! East-West boundaries
399	! !* Cyclic east-west
400	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
401	ptab( 1 ,:,:) = ptab(jpim1,:,:)
402	ptab(jpi,:,:) = ptab( 2 ,:,:)
403	ELSE !* closed
404	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
405	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
406	ENDIF
407	! ! North-South boundaries (always closed)
408	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
409	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
410	!
411	ENDIF
412
413	! 2. East and west directions exchange
414	! ------------------------------------
415	! we play with the neigbours AND the row number because of the periodicity
416	!
417	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
418	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
419	iihom = nlci-nreci
420	DO jl = 1, jpreci
421	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
422	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
423	END DO
424	END SELECT
425	!
426	! ! Migrations
427	imigr = jpreci * jpj * jpk
428	!
429	SELECT CASE ( nbondi )
430	CASE ( -1 )
431	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
432	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
433	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
434	CASE ( 0 )
435	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
436	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
437	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
438	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
439	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
440	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
441	CASE ( 1 )
442	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
443	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
444	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
445	END SELECT
446	!
447	! ! Write Dirichlet lateral conditions
448	iihom = nlci-jpreci
449	!
450	SELECT CASE ( nbondi )
451	CASE ( -1 )
452	DO jl = 1, jpreci
453	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
454	END DO
455	CASE ( 0 )
456	DO jl = 1, jpreci
457	ptab(jl ,:,:) = zt3we(:,jl,:,2)
458	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
459	END DO
460	CASE ( 1 )
461	DO jl = 1, jpreci
462	ptab(jl ,:,:) = zt3we(:,jl,:,2)
463	END DO
464	END SELECT
465
466
467	! 3. North and south directions
468	! -----------------------------
469	! always closed : we play only with the neigbours
470	!
471	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
472	ijhom = nlcj-nrecj
473	DO jl = 1, jprecj
474	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
475	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
476	END DO
477	ENDIF
478	!
479	! ! Migrations
480	imigr = jprecj * jpi * jpk
481	!
482	SELECT CASE ( nbondj )
483	CASE ( -1 )
484	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
485	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
486	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
487	CASE ( 0 )
488	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
489	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
490	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
491	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
492	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
493	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
494	CASE ( 1 )
495	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
496	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
497	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
498	END SELECT
499	!
500	! ! Write Dirichlet lateral conditions
501	ijhom = nlcj-jprecj
502	!
503	SELECT CASE ( nbondj )
504	CASE ( -1 )
505	DO jl = 1, jprecj
506	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
507	END DO
508	CASE ( 0 )
509	DO jl = 1, jprecj
510	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
511	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
512	END DO
513	CASE ( 1 )
514	DO jl = 1, jprecj
515	ptab(:,jl,:) = zt3sn(:,jl,:,2)
516	END DO
517	END SELECT
518
519
520	! 4. north fold treatment
521	! -----------------------
522	!
523	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
524	!
525	SELECT CASE ( jpni )
526	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
527	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
528	END SELECT
529	!
530	ENDIF
531	!
532	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
533	!
534	END SUBROUTINE mpp_lnk_3d
535
536	SUBROUTINE mpp_lnk_2d_multiple( pt2d_array , type_array , psgn_array , num_fields , cd_mpp, pval )
537	!!----------------------------------------------------------------------
538	!! * routine mpp_lnk_2d_multiple *
539	!!
540	!! ** Purpose : Message passing management for multiple 2d arrays
541	!!
542	!! ** Method : Use mppsend and mpprecv function for passing mask
543	!! between processors following neighboring subdomains.
544	!! domain parameters
545	!! nlci : first dimension of the local subdomain
546	!! nlcj : second dimension of the local subdomain
547	!! nbondi : mark for "east-west local boundary"
548	!! nbondj : mark for "north-south local boundary"
549	!! noea : number for local neighboring processors
550	!! nowe : number for local neighboring processors
551	!! noso : number for local neighboring processors
552	!! nono : number for local neighboring processors
553	!!
554	!!----------------------------------------------------------------------
555
556	INTEGER :: num_fields
557	TYPE( arrayptr ), DIMENSION(:) :: pt2d_array
558	CHARACTER(len=1), DIMENSION(:), INTENT(in ) :: type_array ! define the nature of ptab array grid-points
559	! ! = T , U , V , F , W and I points
560	REAL(wp) , DIMENSION(:), INTENT(in ) :: psgn_array ! =-1 the sign change across the north fold boundary
561	! ! = 1. , the sign is kept
562	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
563	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
564	!!
565	INTEGER :: ji, jj, jl ! dummy loop indices
566	INTEGER :: ii !!MULTI SEND DUMMY LOOP INDICES
567	INTEGER :: imigr, iihom, ijhom ! temporary integers
568	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
569
570	REAL(wp) :: zland
571	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
572	!
573	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
574	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
575
576	!!----------------------------------------------------------------------
577
578	ALLOCATE( zt2ns(jpi,jprecj,2num_fields), zt2sn(jpi,jprecj,2num_fields), &
579	& zt2ew(jpj,jpreci,2num_fields), zt2we(jpj,jpreci,2num_fields) )
580
581	!
582	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
583	ELSE ; zland = 0.e0 ! zero by default
584	ENDIF
585
586	! 1. standard boundary treatment
587	! ------------------------------
588	!
589	!First Array
590	DO ii = 1 , num_fields
591	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
592	!
593	! WARNING pt2d is defined only between nld and nle
594	DO jj = nlcj+1, jpj ! added line(s) (inner only)
595	pt2d_array(ii)%pt2d(nldi :nlei , jj) = pt2d_array(ii)%pt2d(nldi:nlei, nlej)
596	pt2d_array(ii)%pt2d(1 :nldi-1, jj) = pt2d_array(ii)%pt2d(nldi , nlej)
597	pt2d_array(ii)%pt2d(nlei+1:nlci , jj) = pt2d_array(ii)%pt2d( nlei, nlej)
598	END DO
599	DO ji = nlci+1, jpi ! added column(s) (full)
600	pt2d_array(ii)%pt2d(ji, nldj :nlej ) = pt2d_array(ii)%pt2d(nlei, nldj:nlej)
601	pt2d_array(ii)%pt2d(ji, 1 :nldj-1) = pt2d_array(ii)%pt2d(nlei, nldj )
602	pt2d_array(ii)%pt2d(ji, nlej+1:jpj ) = pt2d_array(ii)%pt2d(nlei, nlej)
603	END DO
604	!
605	ELSE ! standard close or cyclic treatment
606	!
607	! ! East-West boundaries
608	IF( nbondi == 2 .AND. & ! Cyclic east-west
609	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
610	pt2d_array(ii)%pt2d( 1 , : ) = pt2d_array(ii)%pt2d( jpim1, : ) ! west
611	pt2d_array(ii)%pt2d( jpi , : ) = pt2d_array(ii)%pt2d( 2 , : ) ! east
612	ELSE ! closed
613	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d( 1 : jpreci,:) = zland ! south except F-point
614	pt2d_array(ii)%pt2d(nlci-jpreci+1 : jpi ,:) = zland ! north
615	ENDIF
616	! ! North-South boundaries (always closed)
617	IF( .NOT. type_array(ii) == 'F' ) pt2d_array(ii)%pt2d(:, 1:jprecj ) = zland ! south except F-point
618	pt2d_array(ii)%pt2d(:, nlcj-jprecj+1:jpj ) = zland ! north
619	!
620	ENDIF
621	END DO
622
623	! 2. East and west directions exchange
624	! ------------------------------------
625	! we play with the neigbours AND the row number because of the periodicity
626	!
627	DO ii = 1 , num_fields
628	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
629	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
630	iihom = nlci-nreci
631	DO jl = 1, jpreci
632	zt2ew( : , jl , ii ) = pt2d_array(ii)%pt2d( jpreci+jl , : )
633	zt2we( : , jl , ii ) = pt2d_array(ii)%pt2d( iihom +jl , : )
634	END DO
635	END SELECT
636	END DO
637	!
638	! ! Migrations
639	imigr = jpreci * jpj
640	!
641	SELECT CASE ( nbondi )
642	CASE ( -1 )
643	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req1 )
644	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
645	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
646	CASE ( 0 )
647	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
648	CALL mppsend( 2, zt2we(1,1,1), num_fields*imigr, noea, ml_req2 )
649	CALL mpprecv( 1, zt2ew(1,1,num_fields+1), num_fields*imigr, noea )
650	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
651	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
652	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
653	CASE ( 1 )
654	CALL mppsend( 1, zt2ew(1,1,1), num_fields*imigr, nowe, ml_req1 )
655	CALL mpprecv( 2, zt2we(1,1,num_fields+1), num_fields*imigr, nowe )
656	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
657	END SELECT
658	!
659	! ! Write Dirichlet lateral conditions
660	iihom = nlci - jpreci
661	!
662
663	DO ii = 1 , num_fields
664	SELECT CASE ( nbondi )
665	CASE ( -1 )
666	DO jl = 1, jpreci
667	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
668	END DO
669	CASE ( 0 )
670	DO jl = 1, jpreci
671	pt2d_array(ii)%pt2d( jl , : ) = zt2we(:,jl,num_fields+ii)
672	pt2d_array(ii)%pt2d( iihom+jl , : ) = zt2ew(:,jl,num_fields+ii)
673	END DO
674	CASE ( 1 )
675	DO jl = 1, jpreci
676	pt2d_array(ii)%pt2d( jl , : )= zt2we(:,jl,num_fields+ii)
677	END DO
678	END SELECT
679	END DO
680
681	! 3. North and south directions
682	! -----------------------------
683	! always closed : we play only with the neigbours
684	!
685	!First Array
686	DO ii = 1 , num_fields
687	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
688	ijhom = nlcj-nrecj
689	DO jl = 1, jprecj
690	zt2sn(:,jl , ii) = pt2d_array(ii)%pt2d( : , ijhom +jl )
691	zt2ns(:,jl , ii) = pt2d_array(ii)%pt2d( : , jprecj+jl )
692	END DO
693	ENDIF
694	END DO
695	!
696	! ! Migrations
697	imigr = jprecj * jpi
698	!
699	SELECT CASE ( nbondj )
700	CASE ( -1 )
701	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req1 )
702	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
703	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
704	CASE ( 0 )
705	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
706	CALL mppsend( 4, zt2sn(1,1,1), num_fields*imigr, nono, ml_req2 )
707	CALL mpprecv( 3, zt2ns(1,1,num_fields+1), num_fields*imigr, nono )
708	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
709	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
710	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
711	CASE ( 1 )
712	CALL mppsend( 3, zt2ns(1,1,1), num_fields*imigr, noso, ml_req1 )
713	CALL mpprecv( 4, zt2sn(1,1,num_fields+1), num_fields*imigr, noso )
714	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
715	END SELECT
716	!
717	! ! Write Dirichlet lateral conditions
718	ijhom = nlcj - jprecj
719	!
720
721	DO ii = 1 , num_fields
722	!First Array
723	SELECT CASE ( nbondj )
724	CASE ( -1 )
725	DO jl = 1, jprecj
726	pt2d_array(ii)%pt2d( : , ijhom+jl ) = zt2ns( : , jl , num_fields+ii )
727	END DO
728	CASE ( 0 )
729	DO jl = 1, jprecj
730	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii)
731	pt2d_array(ii)%pt2d( : , ijhom + jl ) = zt2ns( : , jl , num_fields + ii )
732	END DO
733	CASE ( 1 )
734	DO jl = 1, jprecj
735	pt2d_array(ii)%pt2d( : , jl ) = zt2sn( : , jl , num_fields + ii )
736	END DO
737	END SELECT
738	END DO
739
740	! 4. north fold treatment
741	! -----------------------
742	!
743	!First Array
744	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
745	!
746	SELECT CASE ( jpni )
747	CASE ( 1 ) ;
748	DO ii = 1 , num_fields
749	CALL lbc_nfd ( pt2d_array(ii)%pt2d( : , : ), type_array(ii) , psgn_array(ii) ) ! only 1 northern proc, no mpp
750	END DO
751	CASE DEFAULT ; CALL mpp_lbc_north_2d_multiple( pt2d_array, type_array, psgn_array, num_fields ) ! for all northern procs.
752	END SELECT
753	!
754	ENDIF
755	!
756
757	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
758	!
759	END SUBROUTINE mpp_lnk_2d_multiple
760
761
762	SUBROUTINE load_array(pt2d,cd_type,psgn,pt2d_array, type_array, psgn_array,num_fields)
763	!!---------------------------------------------------------------------
764	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2d ! Second 2D array on which the boundary condition is applied
765	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
766	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
767	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
768	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
769	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
770	INTEGER , INTENT (inout):: num_fields
771	!!---------------------------------------------------------------------
772	num_fields=num_fields+1
773	pt2d_array(num_fields)%pt2d=>pt2d
774	type_array(num_fields)=cd_type
775	psgn_array(num_fields)=psgn
776	END SUBROUTINE load_array
777
778
779	SUBROUTINE mpp_lnk_2d_9( pt2dA, cd_typeA, psgnA, pt2dB, cd_typeB, psgnB, pt2dC, cd_typeC, psgnC &
780	& , pt2dD, cd_typeD, psgnD, pt2dE, cd_typeE, psgnE, pt2dF, cd_typeF, psgnF &
781	& , pt2dG, cd_typeG, psgnG, pt2dH, cd_typeH, psgnH, pt2dI, cd_typeI, psgnI, cd_mpp, pval)
782	!!---------------------------------------------------------------------
783	! Second 2D array on which the boundary condition is applied
784	REAL(wp), DIMENSION(jpi,jpj), TARGET , INTENT(inout) :: pt2dA
785	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dB , pt2dC , pt2dD , pt2dE
786	REAL(wp), DIMENSION(jpi,jpj), TARGET, OPTIONAL, INTENT(inout) :: pt2dF , pt2dG , pt2dH , pt2dI
787	! define the nature of ptab array grid-points
788	CHARACTER(len=1) , INTENT(in ) :: cd_typeA
789	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeB , cd_typeC , cd_typeD , cd_typeE
790	CHARACTER(len=1) , OPTIONAL, INTENT(in ) :: cd_typeF , cd_typeG , cd_typeH , cd_typeI
791	! =-1 the sign change across the north fold boundary
792	REAL(wp) , INTENT(in ) :: psgnA
793	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnB , psgnC , psgnD , psgnE
794	REAL(wp) , OPTIONAL, INTENT(in ) :: psgnF , psgnG , psgnH , psgnI
795	CHARACTER(len=3) , OPTIONAL, INTENT(in ) :: cd_mpp ! fill the overlap area only
796	REAL(wp) , OPTIONAL, INTENT(in ) :: pval ! background value (used at closed boundaries)
797	!!
798	TYPE(arrayptr) , DIMENSION(9) :: pt2d_array
799	CHARACTER(len=1) , DIMENSION(9) :: type_array ! define the nature of ptab array grid-points
800	! ! = T , U , V , F , W and I points
801	REAL(wp) , DIMENSION(9) :: psgn_array ! =-1 the sign change across the north fold boundary
802	INTEGER :: num_fields
803	!!---------------------------------------------------------------------
804
805	num_fields = 0
806
807	!! Load the first array
808	CALL load_array(pt2dA,cd_typeA,psgnA,pt2d_array, type_array, psgn_array,num_fields)
809
810	!! Look if more arrays are added
811	IF(PRESENT (psgnB) )CALL load_array(pt2dB,cd_typeB,psgnB,pt2d_array, type_array, psgn_array,num_fields)
812	IF(PRESENT (psgnC) )CALL load_array(pt2dC,cd_typeC,psgnC,pt2d_array, type_array, psgn_array,num_fields)
813	IF(PRESENT (psgnD) )CALL load_array(pt2dD,cd_typeD,psgnD,pt2d_array, type_array, psgn_array,num_fields)
814	IF(PRESENT (psgnE) )CALL load_array(pt2dE,cd_typeE,psgnE,pt2d_array, type_array, psgn_array,num_fields)
815	IF(PRESENT (psgnF) )CALL load_array(pt2dF,cd_typeF,psgnF,pt2d_array, type_array, psgn_array,num_fields)
816	IF(PRESENT (psgnG) )CALL load_array(pt2dG,cd_typeG,psgnG,pt2d_array, type_array, psgn_array,num_fields)
817	IF(PRESENT (psgnH) )CALL load_array(pt2dH,cd_typeH,psgnH,pt2d_array, type_array, psgn_array,num_fields)
818	IF(PRESENT (psgnI) )CALL load_array(pt2dI,cd_typeI,psgnI,pt2d_array, type_array, psgn_array,num_fields)
819
820	CALL mpp_lnk_2d_multiple(pt2d_array,type_array,psgn_array,num_fields,cd_mpp,pval)
821	END SUBROUTINE mpp_lnk_2d_9
822
823
824	SUBROUTINE mpp_lnk_2d( pt2d, cd_type, psgn, cd_mpp, pval )
825	!!----------------------------------------------------------------------
826	!! * routine mpp_lnk_2d *
827	!!
828	!! ** Purpose : Message passing manadgement for 2d array
829	!!
830	!! ** Method : Use mppsend and mpprecv function for passing mask
831	!! between processors following neighboring subdomains.
832	!! domain parameters
833	!! nlci : first dimension of the local subdomain
834	!! nlcj : second dimension of the local subdomain
835	!! nbondi : mark for "east-west local boundary"
836	!! nbondj : mark for "north-south local boundary"
837	!! noea : number for local neighboring processors
838	!! nowe : number for local neighboring processors
839	!! noso : number for local neighboring processors
840	!! nono : number for local neighboring processors
841	!!
842	!!----------------------------------------------------------------------
843	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the boundary condition is applied
844	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
845	! ! = T , U , V , F , W and I points
846	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
847	! ! = 1. , the sign is kept
848	CHARACTER(len=3), OPTIONAL , INTENT(in ) :: cd_mpp ! fill the overlap area only
849	REAL(wp) , OPTIONAL , INTENT(in ) :: pval ! background value (used at closed boundaries)
850	!!
851	INTEGER :: ji, jj, jl ! dummy loop indices
852	INTEGER :: imigr, iihom, ijhom ! temporary integers
853	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
854	REAL(wp) :: zland
855	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
856	!
857	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
858	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
859
860	!!----------------------------------------------------------------------
861
862	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
863	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
864
865	!
866	IF( PRESENT( pval ) ) THEN ; zland = pval ! set land value
867	ELSE ; zland = 0.e0 ! zero by default
868	ENDIF
869
870	! 1. standard boundary treatment
871	! ------------------------------
872	!
873	IF( PRESENT( cd_mpp ) ) THEN ! only fill added line/raw with existing values
874	!
875	! WARNING pt2d is defined only between nld and nle
876	DO jj = nlcj+1, jpj ! added line(s) (inner only)
877	pt2d(nldi :nlei , jj ) = pt2d(nldi:nlei, nlej)
878	pt2d(1 :nldi-1, jj ) = pt2d(nldi , nlej)
879	pt2d(nlei+1:nlci , jj ) = pt2d( nlei, nlej)
880	END DO
881	DO ji = nlci+1, jpi ! added column(s) (full)
882	pt2d(ji ,nldj :nlej ) = pt2d( nlei,nldj:nlej)
883	pt2d(ji ,1 :nldj-1) = pt2d( nlei,nldj )
884	pt2d(ji ,nlej+1:jpj ) = pt2d( nlei, nlej)
885	END DO
886	!
887	ELSE ! standard close or cyclic treatment
888	!
889	! ! East-West boundaries
890	IF( nbondi == 2 .AND. & ! Cyclic east-west
891	& (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
892	pt2d( 1 ,:) = pt2d(jpim1,:) ! west
893	pt2d(jpi,:) = pt2d( 2 ,:) ! east
894	ELSE ! closed
895	IF( .NOT. cd_type == 'F' ) pt2d( 1 :jpreci,:) = zland ! south except F-point
896	pt2d(nlci-jpreci+1:jpi ,:) = zland ! north
897	ENDIF
898	! ! North-South boundaries (always closed)
899	IF( .NOT. cd_type == 'F' ) pt2d(:, 1 :jprecj) = zland !south except F-point
900	pt2d(:,nlcj-jprecj+1:jpj ) = zland ! north
901	!
902	ENDIF
903
904	! 2. East and west directions exchange
905	! ------------------------------------
906	! we play with the neigbours AND the row number because of the periodicity
907	!
908	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
909	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
910	iihom = nlci-nreci
911	DO jl = 1, jpreci
912	zt2ew(:,jl,1) = pt2d(jpreci+jl,:)
913	zt2we(:,jl,1) = pt2d(iihom +jl,:)
914	END DO
915	END SELECT
916	!
917	! ! Migrations
918	imigr = jpreci * jpj
919	!
920	SELECT CASE ( nbondi )
921	CASE ( -1 )
922	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
923	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
924	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
925	CASE ( 0 )
926	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
927	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
928	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
929	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
930	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
931	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
932	CASE ( 1 )
933	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
934	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
935	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
936	END SELECT
937	!
938	! ! Write Dirichlet lateral conditions
939	iihom = nlci - jpreci
940	!
941	SELECT CASE ( nbondi )
942	CASE ( -1 )
943	DO jl = 1, jpreci
944	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
945	END DO
946	CASE ( 0 )
947	DO jl = 1, jpreci
948	pt2d(jl ,:) = zt2we(:,jl,2)
949	pt2d(iihom+jl,:) = zt2ew(:,jl,2)
950	END DO
951	CASE ( 1 )
952	DO jl = 1, jpreci
953	pt2d(jl ,:) = zt2we(:,jl,2)
954	END DO
955	END SELECT
956
957
958	! 3. North and south directions
959	! -----------------------------
960	! always closed : we play only with the neigbours
961	!
962	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
963	ijhom = nlcj-nrecj
964	DO jl = 1, jprecj
965	zt2sn(:,jl,1) = pt2d(:,ijhom +jl)
966	zt2ns(:,jl,1) = pt2d(:,jprecj+jl)
967	END DO
968	ENDIF
969	!
970	! ! Migrations
971	imigr = jprecj * jpi
972	!
973	SELECT CASE ( nbondj )
974	CASE ( -1 )
975	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
976	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
977	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
978	CASE ( 0 )
979	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
980	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
981	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
982	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
983	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
984	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
985	CASE ( 1 )
986	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
987	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
988	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
989	END SELECT
990	!
991	! ! Write Dirichlet lateral conditions
992	ijhom = nlcj - jprecj
993	!
994	SELECT CASE ( nbondj )
995	CASE ( -1 )
996	DO jl = 1, jprecj
997	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
998	END DO
999	CASE ( 0 )
1000	DO jl = 1, jprecj
1001	pt2d(:,jl ) = zt2sn(:,jl,2)
1002	pt2d(:,ijhom+jl) = zt2ns(:,jl,2)
1003	END DO
1004	CASE ( 1 )
1005	DO jl = 1, jprecj
1006	pt2d(:,jl ) = zt2sn(:,jl,2)
1007	END DO
1008	END SELECT
1009
1010
1011	! 4. north fold treatment
1012	! -----------------------
1013	!
1014	IF( npolj /= 0 .AND. .NOT. PRESENT(cd_mpp) ) THEN
1015	!
1016	SELECT CASE ( jpni )
1017	CASE ( 1 ) ; CALL lbc_nfd ( pt2d, cd_type, psgn ) ! only 1 northern proc, no mpp
1018	CASE DEFAULT ; CALL mpp_lbc_north( pt2d, cd_type, psgn ) ! for all northern procs.
1019	END SELECT
1020	!
1021	ENDIF
1022	!
1023	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
1024	!
1025	END SUBROUTINE mpp_lnk_2d
1026
1027
1028	SUBROUTINE mpp_lnk_3d_gather( ptab1, cd_type1, ptab2, cd_type2, psgn )
1029	!!----------------------------------------------------------------------
1030	!! * routine mpp_lnk_3d_gather *
1031	!!
1032	!! ** Purpose : Message passing manadgement for two 3D arrays
1033	!!
1034	!! ** Method : Use mppsend and mpprecv function for passing mask
1035	!! between processors following neighboring subdomains.
1036	!! domain parameters
1037	!! nlci : first dimension of the local subdomain
1038	!! nlcj : second dimension of the local subdomain
1039	!! nbondi : mark for "east-west local boundary"
1040	!! nbondj : mark for "north-south local boundary"
1041	!! noea : number for local neighboring processors
1042	!! nowe : number for local neighboring processors
1043	!! noso : number for local neighboring processors
1044	!! nono : number for local neighboring processors
1045	!!
1046	!! ** Action : ptab1 and ptab2 with update value at its periphery
1047	!!
1048	!!----------------------------------------------------------------------
1049	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab1 ! first and second 3D array on which
1050	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab2 ! the boundary condition is applied
1051	CHARACTER(len=1) , INTENT(in ) :: cd_type1 ! nature of ptab1 and ptab2 arrays
1052	CHARACTER(len=1) , INTENT(in ) :: cd_type2 ! i.e. grid-points = T , U , V , F or W points
1053	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
1054	!! ! = 1. , the sign is kept
1055	INTEGER :: jl ! dummy loop indices
1056	INTEGER :: imigr, iihom, ijhom ! temporary integers
1057	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1058	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1059	!
1060	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ns, zt4sn ! 2 x 3d for north-south & south-north
1061	REAL(wp), DIMENSION(:,:,:,:,:), ALLOCATABLE :: zt4ew, zt4we ! 2 x 3d for east-west & west-east
1062
1063	!!----------------------------------------------------------------------
1064	ALLOCATE( zt4ns(jpi,jprecj,jpk,2,2), zt4sn(jpi,jprecj,jpk,2,2) , &
1065	& zt4ew(jpj,jpreci,jpk,2,2), zt4we(jpj,jpreci,jpk,2,2) )
1066
1067
1068	! 1. standard boundary treatment
1069	! ------------------------------
1070	! ! East-West boundaries
1071	! !* Cyclic east-west
1072	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1073	ptab1( 1 ,:,:) = ptab1(jpim1,:,:)
1074	ptab1(jpi,:,:) = ptab1( 2 ,:,:)
1075	ptab2( 1 ,:,:) = ptab2(jpim1,:,:)
1076	ptab2(jpi,:,:) = ptab2( 2 ,:,:)
1077	ELSE !* closed
1078	IF( .NOT. cd_type1 == 'F' ) ptab1( 1 :jpreci,:,:) = 0.e0 ! south except at F-point
1079	IF( .NOT. cd_type2 == 'F' ) ptab2( 1 :jpreci,:,:) = 0.e0
1080	ptab1(nlci-jpreci+1:jpi ,:,:) = 0.e0 ! north
1081	ptab2(nlci-jpreci+1:jpi ,:,:) = 0.e0
1082	ENDIF
1083
1084
1085	! ! North-South boundaries
1086	IF( .NOT. cd_type1 == 'F' ) ptab1(:, 1 :jprecj,:) = 0.e0 ! south except at F-point
1087	IF( .NOT. cd_type2 == 'F' ) ptab2(:, 1 :jprecj,:) = 0.e0
1088	ptab1(:,nlcj-jprecj+1:jpj ,:) = 0.e0 ! north
1089	ptab2(:,nlcj-jprecj+1:jpj ,:) = 0.e0
1090
1091
1092	! 2. East and west directions exchange
1093	! ------------------------------------
1094	! we play with the neigbours AND the row number because of the periodicity
1095	!
1096	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1097	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1098	iihom = nlci-nreci
1099	DO jl = 1, jpreci
1100	zt4ew(:,jl,:,1,1) = ptab1(jpreci+jl,:,:)
1101	zt4we(:,jl,:,1,1) = ptab1(iihom +jl,:,:)
1102	zt4ew(:,jl,:,2,1) = ptab2(jpreci+jl,:,:)
1103	zt4we(:,jl,:,2,1) = ptab2(iihom +jl,:,:)
1104	END DO
1105	END SELECT
1106	!
1107	! ! Migrations
1108	imigr = jpreci * jpj * jpk *2
1109	!
1110	SELECT CASE ( nbondi )
1111	CASE ( -1 )
1112	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req1 )
1113	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1114	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1115	CASE ( 0 )
1116	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1117	CALL mppsend( 2, zt4we(1,1,1,1,1), imigr, noea, ml_req2 )
1118	CALL mpprecv( 1, zt4ew(1,1,1,1,2), imigr, noea )
1119	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1120	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1121	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1122	CASE ( 1 )
1123	CALL mppsend( 1, zt4ew(1,1,1,1,1), imigr, nowe, ml_req1 )
1124	CALL mpprecv( 2, zt4we(1,1,1,1,2), imigr, nowe )
1125	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1126	END SELECT
1127	!
1128	! ! Write Dirichlet lateral conditions
1129	iihom = nlci - jpreci
1130	!
1131	SELECT CASE ( nbondi )
1132	CASE ( -1 )
1133	DO jl = 1, jpreci
1134	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1135	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1136	END DO
1137	CASE ( 0 )
1138	DO jl = 1, jpreci
1139	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1140	ptab1(iihom+jl,:,:) = zt4ew(:,jl,:,1,2)
1141	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1142	ptab2(iihom+jl,:,:) = zt4ew(:,jl,:,2,2)
1143	END DO
1144	CASE ( 1 )
1145	DO jl = 1, jpreci
1146	ptab1(jl ,:,:) = zt4we(:,jl,:,1,2)
1147	ptab2(jl ,:,:) = zt4we(:,jl,:,2,2)
1148	END DO
1149	END SELECT
1150
1151
1152	! 3. North and south directions
1153	! -----------------------------
1154	! always closed : we play only with the neigbours
1155	!
1156	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1157	ijhom = nlcj - nrecj
1158	DO jl = 1, jprecj
1159	zt4sn(:,jl,:,1,1) = ptab1(:,ijhom +jl,:)
1160	zt4ns(:,jl,:,1,1) = ptab1(:,jprecj+jl,:)
1161	zt4sn(:,jl,:,2,1) = ptab2(:,ijhom +jl,:)
1162	zt4ns(:,jl,:,2,1) = ptab2(:,jprecj+jl,:)
1163	END DO
1164	ENDIF
1165	!
1166	! ! Migrations
1167	imigr = jprecj * jpi * jpk * 2
1168	!
1169	SELECT CASE ( nbondj )
1170	CASE ( -1 )
1171	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req1 )
1172	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1173	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1174	CASE ( 0 )
1175	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1176	CALL mppsend( 4, zt4sn(1,1,1,1,1), imigr, nono, ml_req2 )
1177	CALL mpprecv( 3, zt4ns(1,1,1,1,2), imigr, nono )
1178	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1179	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1180	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
1181	CASE ( 1 )
1182	CALL mppsend( 3, zt4ns(1,1,1,1,1), imigr, noso, ml_req1 )
1183	CALL mpprecv( 4, zt4sn(1,1,1,1,2), imigr, noso )
1184	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
1185	END SELECT
1186	!
1187	! ! Write Dirichlet lateral conditions
1188	ijhom = nlcj - jprecj
1189	!
1190	SELECT CASE ( nbondj )
1191	CASE ( -1 )
1192	DO jl = 1, jprecj
1193	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1194	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1195	END DO
1196	CASE ( 0 )
1197	DO jl = 1, jprecj
1198	ptab1(:,jl ,:) = zt4sn(:,jl,:,1,2)
1199	ptab1(:,ijhom+jl,:) = zt4ns(:,jl,:,1,2)
1200	ptab2(:,jl ,:) = zt4sn(:,jl,:,2,2)
1201	ptab2(:,ijhom+jl,:) = zt4ns(:,jl,:,2,2)
1202	END DO
1203	CASE ( 1 )
1204	DO jl = 1, jprecj
1205	ptab1(:,jl,:) = zt4sn(:,jl,:,1,2)
1206	ptab2(:,jl,:) = zt4sn(:,jl,:,2,2)
1207	END DO
1208	END SELECT
1209
1210
1211	! 4. north fold treatment
1212	! -----------------------
1213	IF( npolj /= 0 ) THEN
1214	!
1215	SELECT CASE ( jpni )
1216	CASE ( 1 )
1217	CALL lbc_nfd ( ptab1, cd_type1, psgn ) ! only for northern procs.
1218	CALL lbc_nfd ( ptab2, cd_type2, psgn )
1219	CASE DEFAULT
1220	CALL mpp_lbc_north( ptab1, cd_type1, psgn ) ! for all northern procs.
1221	CALL mpp_lbc_north (ptab2, cd_type2, psgn)
1222	END SELECT
1223	!
1224	ENDIF
1225	!
1226	DEALLOCATE( zt4ns, zt4sn, zt4ew, zt4we )
1227	!
1228	END SUBROUTINE mpp_lnk_3d_gather
1229
1230
1231	SUBROUTINE mpp_lnk_2d_e( pt2d, cd_type, psgn, jpri, jprj )
1232	!!----------------------------------------------------------------------
1233	!! * routine mpp_lnk_2d_e *
1234	!!
1235	!! ** Purpose : Message passing manadgement for 2d array (with halo)
1236	!!
1237	!! ** Method : Use mppsend and mpprecv function for passing mask
1238	!! between processors following neighboring subdomains.
1239	!! domain parameters
1240	!! nlci : first dimension of the local subdomain
1241	!! nlcj : second dimension of the local subdomain
1242	!! jpri : number of rows for extra outer halo
1243	!! jprj : number of columns for extra outer halo
1244	!! nbondi : mark for "east-west local boundary"
1245	!! nbondj : mark for "north-south local boundary"
1246	!! noea : number for local neighboring processors
1247	!! nowe : number for local neighboring processors
1248	!! noso : number for local neighboring processors
1249	!! nono : number for local neighboring processors
1250	!!
1251	!!----------------------------------------------------------------------
1252	INTEGER , INTENT(in ) :: jpri
1253	INTEGER , INTENT(in ) :: jprj
1254	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
1255	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
1256	! ! = T , U , V , F , W and I points
1257	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
1258	!! ! north boundary, = 1. otherwise
1259	INTEGER :: jl ! dummy loop indices
1260	INTEGER :: imigr, iihom, ijhom ! temporary integers
1261	INTEGER :: ipreci, iprecj ! temporary integers
1262	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
1263	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
1264	!!
1265	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
1266	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
1267	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
1268	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
1269	!!----------------------------------------------------------------------
1270
1271	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
1272	iprecj = jprecj + jprj
1273
1274
1275	! 1. standard boundary treatment
1276	! ------------------------------
1277	! Order matters Here !!!!
1278	!
1279	! !* North-South boundaries (always colsed)
1280	IF( .NOT. cd_type == 'F' ) pt2d(:, 1-jprj : jprecj ) = 0.e0 ! south except at F-point
1281	pt2d(:,nlcj-jprecj+1:jpj+jprj) = 0.e0 ! north
1282
1283	! ! East-West boundaries
1284	! !* Cyclic east-west
1285	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
1286	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
1287	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
1288	!
1289	ELSE !* closed
1290	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
1291	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
1292	ENDIF
1293	!
1294
1295	! north fold treatment
1296	! -----------------------
1297	IF( npolj /= 0 ) THEN
1298	!
1299	SELECT CASE ( jpni )
1300	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
1301	CASE DEFAULT ; CALL mpp_lbc_north_e( pt2d , cd_type, psgn )
1302	END SELECT
1303	!
1304	ENDIF
1305
1306	! 2. East and west directions exchange
1307	! ------------------------------------
1308	! we play with the neigbours AND the row number because of the periodicity
1309	!
1310	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
1311	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
1312	iihom = nlci-nreci-jpri
1313	DO jl = 1, ipreci
1314	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
1315	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
1316	END DO
1317	END SELECT
1318	!
1319	! ! Migrations
1320	imigr = ipreci * ( jpj + 2*jprj)
1321	!
1322	SELECT CASE ( nbondi )
1323	CASE ( -1 )
1324	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
1325	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1326	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1327	CASE ( 0 )
1328	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1329	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
1330	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
1331	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1332	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1333	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1334	CASE ( 1 )
1335	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
1336	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
1337	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1338	END SELECT
1339	!
1340	! ! Write Dirichlet lateral conditions
1341	iihom = nlci - jpreci
1342	!
1343	SELECT CASE ( nbondi )
1344	CASE ( -1 )
1345	DO jl = 1, ipreci
1346	pt2d(iihom+jl,:) = r2dew(:,jl,2)
1347	END DO
1348	CASE ( 0 )
1349	DO jl = 1, ipreci
1350	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1351	pt2d( iihom+jl,:) = r2dew(:,jl,2)
1352	END DO
1353	CASE ( 1 )
1354	DO jl = 1, ipreci
1355	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
1356	END DO
1357	END SELECT
1358
1359
1360	! 3. North and south directions
1361	! -----------------------------
1362	! always closed : we play only with the neigbours
1363	!
1364	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
1365	ijhom = nlcj-nrecj-jprj
1366	DO jl = 1, iprecj
1367	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
1368	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
1369	END DO
1370	ENDIF
1371	!
1372	! ! Migrations
1373	imigr = iprecj * ( jpi + 2*jpri )
1374	!
1375	SELECT CASE ( nbondj )
1376	CASE ( -1 )
1377	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
1378	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1379	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1380	CASE ( 0 )
1381	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1382	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
1383	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
1384	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1385	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1386	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
1387	CASE ( 1 )
1388	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
1389	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
1390	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
1391	END SELECT
1392	!
1393	! ! Write Dirichlet lateral conditions
1394	ijhom = nlcj - jprecj
1395	!
1396	SELECT CASE ( nbondj )
1397	CASE ( -1 )
1398	DO jl = 1, iprecj
1399	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
1400	END DO
1401	CASE ( 0 )
1402	DO jl = 1, iprecj
1403	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1404	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
1405	END DO
1406	CASE ( 1 )
1407	DO jl = 1, iprecj
1408	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
1409	END DO
1410	END SELECT
1411
1412	END SUBROUTINE mpp_lnk_2d_e
1413
1414
1415	SUBROUTINE mppsend( ktyp, pmess, kbytes, kdest, md_req )
1416	!!----------------------------------------------------------------------
1417	!! * routine mppsend *
1418	!!
1419	!! ** Purpose : Send messag passing array
1420	!!
1421	!!----------------------------------------------------------------------
1422	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1423	INTEGER , INTENT(in ) :: kbytes ! size of the array pmess
1424	INTEGER , INTENT(in ) :: kdest ! receive process number
1425	INTEGER , INTENT(in ) :: ktyp ! tag of the message
1426	INTEGER , INTENT(in ) :: md_req ! argument for isend
1427	!!
1428	INTEGER :: iflag
1429	!!----------------------------------------------------------------------
1430	!
1431	SELECT CASE ( cn_mpi_send )
1432	CASE ( 'S' ) ! Standard mpi send (blocking)
1433	CALL mpi_send ( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1434	CASE ( 'B' ) ! Buffer mpi send (blocking)
1435	CALL mpi_bsend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa , iflag )
1436	CASE ( 'I' ) ! Immediate mpi send (non-blocking send)
1437	! be carefull, one more argument here : the mpi request identifier..
1438	CALL mpi_isend( pmess, kbytes, mpi_double_precision, kdest , ktyp, mpi_comm_opa, md_req, iflag )
1439	END SELECT
1440	!
1441	END SUBROUTINE mppsend
1442
1443
1444	SUBROUTINE mpprecv( ktyp, pmess, kbytes, ksource )
1445	!!----------------------------------------------------------------------
1446	!! * routine mpprecv *
1447	!!
1448	!! ** Purpose : Receive messag passing array
1449	!!
1450	!!----------------------------------------------------------------------
1451	REAL(wp), INTENT(inout) :: pmess(*) ! array of real
1452	INTEGER , INTENT(in ) :: kbytes ! suze of the array pmess
1453	INTEGER , INTENT(in ) :: ktyp ! Tag of the recevied message
1454	INTEGER, OPTIONAL, INTENT(in) :: ksource ! source process number
1455	!!
1456	INTEGER :: istatus(mpi_status_size)
1457	INTEGER :: iflag
1458	INTEGER :: use_source
1459	!!----------------------------------------------------------------------
1460	!
1461
1462	! If a specific process number has been passed to the receive call,
1463	! use that one. Default is to use mpi_any_source
1464	use_source=mpi_any_source
1465	if(present(ksource)) then
1466	use_source=ksource
1467	end if
1468
1469	CALL mpi_recv( pmess, kbytes, mpi_double_precision, use_source, ktyp, mpi_comm_opa, istatus, iflag )
1470	!
1471	END SUBROUTINE mpprecv
1472
1473
1474	SUBROUTINE mppgather( ptab, kp, pio )
1475	!!----------------------------------------------------------------------
1476	!! * routine mppgather *
1477	!!
1478	!! ** Purpose : Transfert between a local subdomain array and a work
1479	!! array which is distributed following the vertical level.
1480	!!
1481	!!----------------------------------------------------------------------
1482	REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: ptab ! subdomain input array
1483	INTEGER , INTENT(in ) :: kp ! record length
1484	REAL(wp), DIMENSION(jpi,jpj,jpnij), INTENT( out) :: pio ! subdomain input array
1485	!!
1486	INTEGER :: itaille, ierror ! temporary integer
1487	!!---------------------------------------------------------------------
1488	!
1489	itaille = jpi * jpj
1490	CALL mpi_gather( ptab, itaille, mpi_double_precision, pio, itaille , &
1491	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1492	!
1493	END SUBROUTINE mppgather
1494
1495
1496	SUBROUTINE mppscatter( pio, kp, ptab )
1497	!!----------------------------------------------------------------------
1498	!! * routine mppscatter *
1499	!!
1500	!! ** Purpose : Transfert between awork array which is distributed
1501	!! following the vertical level and the local subdomain array.
1502	!!
1503	!!----------------------------------------------------------------------
1504	REAL(wp), DIMENSION(jpi,jpj,jpnij) :: pio ! output array
1505	INTEGER :: kp ! Tag (not used with MPI
1506	REAL(wp), DIMENSION(jpi,jpj) :: ptab ! subdomain array input
1507	!!
1508	INTEGER :: itaille, ierror ! temporary integer
1509	!!---------------------------------------------------------------------
1510	!
1511	itaille=jpi*jpj
1512	!
1513	CALL mpi_scatter( pio, itaille, mpi_double_precision, ptab, itaille , &
1514	& mpi_double_precision, kp , mpi_comm_opa, ierror )
1515	!
1516	END SUBROUTINE mppscatter
1517
1518
1519	SUBROUTINE mppmax_a_int( ktab, kdim, kcom )
1520	!!----------------------------------------------------------------------
1521	!! * routine mppmax_a_int *
1522	!!
1523	!! ** Purpose : Find maximum value in an integer layout array
1524	!!
1525	!!----------------------------------------------------------------------
1526	INTEGER , INTENT(in ) :: kdim ! size of array
1527	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1528	INTEGER , INTENT(in ), OPTIONAL :: kcom !
1529	!!
1530	INTEGER :: ierror, localcomm ! temporary integer
1531	INTEGER, DIMENSION(kdim) :: iwork
1532	!!----------------------------------------------------------------------
1533	!
1534	localcomm = mpi_comm_opa
1535	IF( PRESENT(kcom) ) localcomm = kcom
1536	!
1537	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_max, localcomm, ierror )
1538	!
1539	ktab(:) = iwork(:)
1540	!
1541	END SUBROUTINE mppmax_a_int
1542
1543
1544	SUBROUTINE mppmax_int( ktab, kcom )
1545	!!----------------------------------------------------------------------
1546	!! * routine mppmax_int *
1547	!!
1548	!! ** Purpose : Find maximum value in an integer layout array
1549	!!
1550	!!----------------------------------------------------------------------
1551	INTEGER, INTENT(inout) :: ktab ! ???
1552	INTEGER, INTENT(in ), OPTIONAL :: kcom ! ???
1553	!!
1554	INTEGER :: ierror, iwork, localcomm ! temporary integer
1555	!!----------------------------------------------------------------------
1556	!
1557	localcomm = mpi_comm_opa
1558	IF( PRESENT(kcom) ) localcomm = kcom
1559	!
1560	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_max, localcomm, ierror)
1561	!
1562	ktab = iwork
1563	!
1564	END SUBROUTINE mppmax_int
1565
1566
1567	SUBROUTINE mppmin_a_int( ktab, kdim, kcom )
1568	!!----------------------------------------------------------------------
1569	!! * routine mppmin_a_int *
1570	!!
1571	!! ** Purpose : Find minimum value in an integer layout array
1572	!!
1573	!!----------------------------------------------------------------------
1574	INTEGER , INTENT( in ) :: kdim ! size of array
1575	INTEGER , INTENT(inout), DIMENSION(kdim) :: ktab ! input array
1576	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1577	!!
1578	INTEGER :: ierror, localcomm ! temporary integer
1579	INTEGER, DIMENSION(kdim) :: iwork
1580	!!----------------------------------------------------------------------
1581	!
1582	localcomm = mpi_comm_opa
1583	IF( PRESENT(kcom) ) localcomm = kcom
1584	!
1585	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_min, localcomm, ierror )
1586	!
1587	ktab(:) = iwork(:)
1588	!
1589	END SUBROUTINE mppmin_a_int
1590
1591
1592	SUBROUTINE mppmin_int( ktab, kcom )
1593	!!----------------------------------------------------------------------
1594	!! * routine mppmin_int *
1595	!!
1596	!! ** Purpose : Find minimum value in an integer layout array
1597	!!
1598	!!----------------------------------------------------------------------
1599	INTEGER, INTENT(inout) :: ktab ! ???
1600	INTEGER , INTENT( in ), OPTIONAL :: kcom ! input array
1601	!!
1602	INTEGER :: ierror, iwork, localcomm
1603	!!----------------------------------------------------------------------
1604	!
1605	localcomm = mpi_comm_opa
1606	IF( PRESENT(kcom) ) localcomm = kcom
1607	!
1608	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_min, localcomm, ierror )
1609	!
1610	ktab = iwork
1611	!
1612	END SUBROUTINE mppmin_int
1613
1614
1615	SUBROUTINE mppsum_a_int( ktab, kdim )
1616	!!----------------------------------------------------------------------
1617	!! * routine mppsum_a_int *
1618	!!
1619	!! ** Purpose : Global integer sum, 1D array case
1620	!!
1621	!!----------------------------------------------------------------------
1622	INTEGER, INTENT(in ) :: kdim ! ???
1623	INTEGER, INTENT(inout), DIMENSION (kdim) :: ktab ! ???
1624	!!
1625	INTEGER :: ierror
1626	INTEGER, DIMENSION (kdim) :: iwork
1627	!!----------------------------------------------------------------------
1628	!
1629	CALL mpi_allreduce( ktab, iwork, kdim, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1630	!
1631	ktab(:) = iwork(:)
1632	!
1633	END SUBROUTINE mppsum_a_int
1634
1635
1636	SUBROUTINE mppsum_int( ktab )
1637	!!----------------------------------------------------------------------
1638	!! * routine mppsum_int *
1639	!!
1640	!! ** Purpose : Global integer sum
1641	!!
1642	!!----------------------------------------------------------------------
1643	INTEGER, INTENT(inout) :: ktab
1644	!!
1645	INTEGER :: ierror, iwork
1646	!!----------------------------------------------------------------------
1647	!
1648	CALL mpi_allreduce( ktab, iwork, 1, mpi_integer, mpi_sum, mpi_comm_opa, ierror )
1649	!
1650	ktab = iwork
1651	!
1652	END SUBROUTINE mppsum_int
1653
1654
1655	SUBROUTINE mppmax_a_real( ptab, kdim, kcom )
1656	!!----------------------------------------------------------------------
1657	!! * routine mppmax_a_real *
1658	!!
1659	!! ** Purpose : Maximum
1660	!!
1661	!!----------------------------------------------------------------------
1662	INTEGER , INTENT(in ) :: kdim
1663	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1664	INTEGER , INTENT(in ), OPTIONAL :: kcom
1665	!!
1666	INTEGER :: ierror, localcomm
1667	REAL(wp), DIMENSION(kdim) :: zwork
1668	!!----------------------------------------------------------------------
1669	!
1670	localcomm = mpi_comm_opa
1671	IF( PRESENT(kcom) ) localcomm = kcom
1672	!
1673	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_max, localcomm, ierror )
1674	ptab(:) = zwork(:)
1675	!
1676	END SUBROUTINE mppmax_a_real
1677
1678
1679	SUBROUTINE mppmax_real( ptab, kcom )
1680	!!----------------------------------------------------------------------
1681	!! * routine mppmax_real *
1682	!!
1683	!! ** Purpose : Maximum
1684	!!
1685	!!----------------------------------------------------------------------
1686	REAL(wp), INTENT(inout) :: ptab ! ???
1687	INTEGER , INTENT(in ), OPTIONAL :: kcom ! ???
1688	!!
1689	INTEGER :: ierror, localcomm
1690	REAL(wp) :: zwork
1691	!!----------------------------------------------------------------------
1692	!
1693	localcomm = mpi_comm_opa
1694	IF( PRESENT(kcom) ) localcomm = kcom
1695	!
1696	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_max, localcomm, ierror )
1697	ptab = zwork
1698	!
1699	END SUBROUTINE mppmax_real
1700
1701	SUBROUTINE mppmax_real_multiple( ptab, NUM , kcom )
1702	!!----------------------------------------------------------------------
1703	!! * routine mppmax_real *
1704	!!
1705	!! ** Purpose : Maximum
1706	!!
1707	!!----------------------------------------------------------------------
1708	REAL(wp), DIMENSION(:) , INTENT(inout) :: ptab ! ???
1709	INTEGER , INTENT(in ) :: NUM
1710	INTEGER , INTENT(in ), OPTIONAL :: kcom ! ???
1711	!!
1712	INTEGER :: ierror, localcomm
1713	REAL(wp) , POINTER , DIMENSION(:) :: zwork
1714	!!----------------------------------------------------------------------
1715	!
1716	CALL wrk_alloc(NUM , zwork)
1717	localcomm = mpi_comm_opa
1718	IF( PRESENT(kcom) ) localcomm = kcom
1719	!
1720	CALL mpi_allreduce( ptab, zwork, NUM, mpi_double_precision, mpi_max, localcomm, ierror )
1721	ptab = zwork
1722	CALL wrk_dealloc(NUM , zwork)
1723	!
1724	END SUBROUTINE mppmax_real_multiple
1725
1726
1727	SUBROUTINE mppmin_a_real( ptab, kdim, kcom )
1728	!!----------------------------------------------------------------------
1729	!! * routine mppmin_a_real *
1730	!!
1731	!! ** Purpose : Minimum of REAL, array case
1732	!!
1733	!!-----------------------------------------------------------------------
1734	INTEGER , INTENT(in ) :: kdim
1735	REAL(wp), INTENT(inout), DIMENSION(kdim) :: ptab
1736	INTEGER , INTENT(in ), OPTIONAL :: kcom
1737	!!
1738	INTEGER :: ierror, localcomm
1739	REAL(wp), DIMENSION(kdim) :: zwork
1740	!!-----------------------------------------------------------------------
1741	!
1742	localcomm = mpi_comm_opa
1743	IF( PRESENT(kcom) ) localcomm = kcom
1744	!
1745	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_min, localcomm, ierror )
1746	ptab(:) = zwork(:)
1747	!
1748	END SUBROUTINE mppmin_a_real
1749
1750
1751	SUBROUTINE mppmin_real( ptab, kcom )
1752	!!----------------------------------------------------------------------
1753	!! * routine mppmin_real *
1754	!!
1755	!! ** Purpose : minimum of REAL, scalar case
1756	!!
1757	!!-----------------------------------------------------------------------
1758	REAL(wp), INTENT(inout) :: ptab !
1759	INTEGER , INTENT(in ), OPTIONAL :: kcom
1760	!!
1761	INTEGER :: ierror
1762	REAL(wp) :: zwork
1763	INTEGER :: localcomm
1764	!!-----------------------------------------------------------------------
1765	!
1766	localcomm = mpi_comm_opa
1767	IF( PRESENT(kcom) ) localcomm = kcom
1768	!
1769	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_min, localcomm, ierror )
1770	ptab = zwork
1771	!
1772	END SUBROUTINE mppmin_real
1773
1774
1775	SUBROUTINE mppsum_a_real( ptab, kdim, kcom )
1776	!!----------------------------------------------------------------------
1777	!! * routine mppsum_a_real *
1778	!!
1779	!! ** Purpose : global sum, REAL ARRAY argument case
1780	!!
1781	!!-----------------------------------------------------------------------
1782	INTEGER , INTENT( in ) :: kdim ! size of ptab
1783	REAL(wp), DIMENSION(kdim), INTENT( inout ) :: ptab ! input array
1784	INTEGER , INTENT( in ), OPTIONAL :: kcom
1785	!!
1786	INTEGER :: ierror ! temporary integer
1787	INTEGER :: localcomm
1788	REAL(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1789	!!-----------------------------------------------------------------------
1790	!
1791	localcomm = mpi_comm_opa
1792	IF( PRESENT(kcom) ) localcomm = kcom
1793	!
1794	CALL mpi_allreduce( ptab, zwork, kdim, mpi_double_precision, mpi_sum, localcomm, ierror )
1795	ptab(:) = zwork(:)
1796	!
1797	END SUBROUTINE mppsum_a_real
1798
1799
1800	SUBROUTINE mppsum_real( ptab, kcom )
1801	!!----------------------------------------------------------------------
1802	!! * routine mppsum_real *
1803	!!
1804	!! ** Purpose : global sum, SCALAR argument case
1805	!!
1806	!!-----------------------------------------------------------------------
1807	REAL(wp), INTENT(inout) :: ptab ! input scalar
1808	INTEGER , INTENT(in ), OPTIONAL :: kcom
1809	!!
1810	INTEGER :: ierror, localcomm
1811	REAL(wp) :: zwork
1812	!!-----------------------------------------------------------------------
1813	!
1814	localcomm = mpi_comm_opa
1815	IF( PRESENT(kcom) ) localcomm = kcom
1816	!
1817	CALL mpi_allreduce( ptab, zwork, 1, mpi_double_precision, mpi_sum, localcomm, ierror )
1818	ptab = zwork
1819	!
1820	END SUBROUTINE mppsum_real
1821
1822	SUBROUTINE mppsum_realdd( ytab, kcom )
1823	!!----------------------------------------------------------------------
1824	!! * routine mppsum_realdd *
1825	!!
1826	!! ** Purpose : global sum in Massively Parallel Processing
1827	!! SCALAR argument case for double-double precision
1828	!!
1829	!!-----------------------------------------------------------------------
1830	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
1831	INTEGER , INTENT( in ), OPTIONAL :: kcom
1832
1833	!! * Local variables (MPI version)
1834	INTEGER :: ierror
1835	INTEGER :: localcomm
1836	COMPLEX(wp) :: zwork
1837
1838	localcomm = mpi_comm_opa
1839	IF( PRESENT(kcom) ) localcomm = kcom
1840
1841	! reduce local sums into global sum
1842	CALL MPI_ALLREDUCE (ytab, zwork, 1, MPI_DOUBLE_COMPLEX, &
1843	MPI_SUMDD,localcomm,ierror)
1844	ytab = zwork
1845
1846	END SUBROUTINE mppsum_realdd
1847
1848
1849	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
1850	!!----------------------------------------------------------------------
1851	!! * routine mppsum_a_realdd *
1852	!!
1853	!! ** Purpose : global sum in Massively Parallel Processing
1854	!! COMPLEX ARRAY case for double-double precision
1855	!!
1856	!!-----------------------------------------------------------------------
1857	INTEGER , INTENT( in ) :: kdim ! size of ytab
1858	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
1859	INTEGER , INTENT( in ), OPTIONAL :: kcom
1860
1861	!! * Local variables (MPI version)
1862	INTEGER :: ierror ! temporary integer
1863	INTEGER :: localcomm
1864	COMPLEX(wp), DIMENSION(kdim) :: zwork ! temporary workspace
1865
1866	localcomm = mpi_comm_opa
1867	IF( PRESENT(kcom) ) localcomm = kcom
1868
1869	CALL MPI_ALLREDUCE (ytab, zwork, kdim, MPI_DOUBLE_COMPLEX, &
1870	MPI_SUMDD,localcomm,ierror)
1871	ytab(:) = zwork(:)
1872
1873	END SUBROUTINE mppsum_a_realdd
1874
1875	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki,kj )
1876	!!------------------------------------------------------------------------
1877	!! * routine mpp_minloc *
1878	!!
1879	!! ** Purpose : Compute the global minimum of an array ptab
1880	!! and also give its global position
1881	!!
1882	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1883	!!
1884	!!--------------------------------------------------------------------------
1885	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1886	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1887	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1888	INTEGER , INTENT( out) :: ki, kj ! index of minimum in global frame
1889	!!
1890	INTEGER , DIMENSION(2) :: ilocs
1891	INTEGER :: ierror
1892	REAL(wp) :: zmin ! local minimum
1893	REAL(wp), DIMENSION(2,1) :: zain, zaout
1894	!!-----------------------------------------------------------------------
1895	!
1896	zmin = MINVAL( ptab(:,:) , mask= pmask == 1.e0 )
1897	ilocs = MINLOC( ptab(:,:) , mask= pmask == 1.e0 )
1898	!
1899	ki = ilocs(1) + nimpp - 1
1900	kj = ilocs(2) + njmpp - 1
1901	!
1902	zain(1,:)=zmin
1903	zain(2,:)=ki+10000.*kj
1904	!
1905	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1906	!
1907	pmin = zaout(1,1)
1908	kj = INT(zaout(2,1)/10000.)
1909	ki = INT(zaout(2,1) - 10000.*kj )
1910	!
1911	END SUBROUTINE mpp_minloc2d
1912
1913
1914	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj ,kk)
1915	!!------------------------------------------------------------------------
1916	!! * routine mpp_minloc *
1917	!!
1918	!! ** Purpose : Compute the global minimum of an array ptab
1919	!! and also give its global position
1920	!!
1921	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1922	!!
1923	!!--------------------------------------------------------------------------
1924	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
1925	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
1926	REAL(wp) , INTENT( out) :: pmin ! Global minimum of ptab
1927	INTEGER , INTENT( out) :: ki, kj, kk ! index of minimum in global frame
1928	!!
1929	INTEGER :: ierror
1930	REAL(wp) :: zmin ! local minimum
1931	INTEGER , DIMENSION(3) :: ilocs
1932	REAL(wp), DIMENSION(2,1) :: zain, zaout
1933	!!-----------------------------------------------------------------------
1934	!
1935	zmin = MINVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
1936	ilocs = MINLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
1937	!
1938	ki = ilocs(1) + nimpp - 1
1939	kj = ilocs(2) + njmpp - 1
1940	kk = ilocs(3)
1941	!
1942	zain(1,:)=zmin
1943	zain(2,:)=ki+10000.kj+100000000.kk
1944	!
1945	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MINLOC,MPI_COMM_OPA,ierror)
1946	!
1947	pmin = zaout(1,1)
1948	kk = INT( zaout(2,1) / 100000000. )
1949	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
1950	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
1951	!
1952	END SUBROUTINE mpp_minloc3d
1953
1954
1955	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
1956	!!------------------------------------------------------------------------
1957	!! * routine mpp_maxloc *
1958	!!
1959	!! ** Purpose : Compute the global maximum of an array ptab
1960	!! and also give its global position
1961	!!
1962	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
1963	!!
1964	!!--------------------------------------------------------------------------
1965	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: ptab ! Local 2D array
1966	REAL(wp), DIMENSION (jpi,jpj), INTENT(in ) :: pmask ! Local mask
1967	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
1968	INTEGER , INTENT( out) :: ki, kj ! index of maximum in global frame
1969	!!
1970	INTEGER :: ierror
1971	INTEGER, DIMENSION (2) :: ilocs
1972	REAL(wp) :: zmax ! local maximum
1973	REAL(wp), DIMENSION(2,1) :: zain, zaout
1974	!!-----------------------------------------------------------------------
1975	!
1976	zmax = MAXVAL( ptab(:,:) , mask= pmask == 1.e0 )
1977	ilocs = MAXLOC( ptab(:,:) , mask= pmask == 1.e0 )
1978	!
1979	ki = ilocs(1) + nimpp - 1
1980	kj = ilocs(2) + njmpp - 1
1981	!
1982	zain(1,:) = zmax
1983	zain(2,:) = ki + 10000. * kj
1984	!
1985	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
1986	!
1987	pmax = zaout(1,1)
1988	kj = INT( zaout(2,1) / 10000. )
1989	ki = INT( zaout(2,1) - 10000.* kj )
1990	!
1991	END SUBROUTINE mpp_maxloc2d
1992
1993
1994	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
1995	!!------------------------------------------------------------------------
1996	!! * routine mpp_maxloc *
1997	!!
1998	!! ** Purpose : Compute the global maximum of an array ptab
1999	!! and also give its global position
2000	!!
2001	!! ** Method : Use MPI_ALLREDUCE with MPI_MINLOC
2002	!!
2003	!!--------------------------------------------------------------------------
2004	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: ptab ! Local 2D array
2005	REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pmask ! Local mask
2006	REAL(wp) , INTENT( out) :: pmax ! Global maximum of ptab
2007	INTEGER , INTENT( out) :: ki, kj, kk ! index of maximum in global frame
2008	!!
2009	REAL(wp) :: zmax ! local maximum
2010	REAL(wp), DIMENSION(2,1) :: zain, zaout
2011	INTEGER , DIMENSION(3) :: ilocs
2012	INTEGER :: ierror
2013	!!-----------------------------------------------------------------------
2014	!
2015	zmax = MAXVAL( ptab(:,:,:) , mask= pmask == 1.e0 )
2016	ilocs = MAXLOC( ptab(:,:,:) , mask= pmask == 1.e0 )
2017	!
2018	ki = ilocs(1) + nimpp - 1
2019	kj = ilocs(2) + njmpp - 1
2020	kk = ilocs(3)
2021	!
2022	zain(1,:)=zmax
2023	zain(2,:)=ki+10000.kj+100000000.kk
2024	!
2025	CALL MPI_ALLREDUCE( zain,zaout, 1, MPI_2DOUBLE_PRECISION,MPI_MAXLOC,MPI_COMM_OPA,ierror)
2026	!
2027	pmax = zaout(1,1)
2028	kk = INT( zaout(2,1) / 100000000. )
2029	kj = INT( zaout(2,1) - kk * 100000000. ) / 10000
2030	ki = INT( zaout(2,1) - kk * 100000000. -kj * 10000. )
2031	!
2032	END SUBROUTINE mpp_maxloc3d
2033
2034
2035	SUBROUTINE mppsync()
2036	!!----------------------------------------------------------------------
2037	!! * routine mppsync *
2038	!!
2039	!! ** Purpose : Massively parallel processors, synchroneous
2040	!!
2041	!!-----------------------------------------------------------------------
2042	INTEGER :: ierror
2043	!!-----------------------------------------------------------------------
2044	!
2045	CALL mpi_barrier( mpi_comm_opa, ierror )
2046	!
2047	END SUBROUTINE mppsync
2048
2049
2050	SUBROUTINE mppstop
2051	!!----------------------------------------------------------------------
2052	!! * routine mppstop *
2053	!!
2054	!! ** purpose : Stop massively parallel processors method
2055	!!
2056	!!----------------------------------------------------------------------
2057	INTEGER :: info
2058	!!----------------------------------------------------------------------
2059	!
2060	CALL mppsync
2061	CALL mpi_finalize( info )
2062	!
2063	END SUBROUTINE mppstop
2064
2065
2066	SUBROUTINE mpp_comm_free( kcom )
2067	!!----------------------------------------------------------------------
2068	!!----------------------------------------------------------------------
2069	INTEGER, INTENT(in) :: kcom
2070	!!
2071	INTEGER :: ierr
2072	!!----------------------------------------------------------------------
2073	!
2074	CALL MPI_COMM_FREE(kcom, ierr)
2075	!
2076	END SUBROUTINE mpp_comm_free
2077
2078
2079	SUBROUTINE mpp_ini_ice( pindic, kumout )
2080	!!----------------------------------------------------------------------
2081	!! * routine mpp_ini_ice *
2082	!!
2083	!! ** Purpose : Initialize special communicator for ice areas
2084	!! condition together with global variables needed in the ddmpp folding
2085	!!
2086	!! ** Method : - Look for ice processors in ice routines
2087	!! - Put their number in nrank_ice
2088	!! - Create groups for the world processors and the ice processors
2089	!! - Create a communicator for ice processors
2090	!!
2091	!! ** output
2092	!! njmppmax = njmpp for northern procs
2093	!! ndim_rank_ice = number of processors with ice
2094	!! nrank_ice (ndim_rank_ice) = ice processors
2095	!! ngrp_iworld = group ID for the world processors
2096	!! ngrp_ice = group ID for the ice processors
2097	!! ncomm_ice = communicator for the ice procs.
2098	!! n_ice_root = number (in the world) of proc 0 in the ice comm.
2099	!!
2100	!!----------------------------------------------------------------------
2101	INTEGER, INTENT(in) :: pindic
2102	INTEGER, INTENT(in) :: kumout ! ocean.output logical unit
2103	!!
2104	INTEGER :: jjproc
2105	INTEGER :: ii, ierr
2106	INTEGER, ALLOCATABLE, DIMENSION(:) :: kice
2107	INTEGER, ALLOCATABLE, DIMENSION(:) :: zwork
2108	!!----------------------------------------------------------------------
2109	!
2110	! Since this is just an init routine and these arrays are of length jpnij
2111	! then don't use wrk_nemo module - just allocate and deallocate.
2112	ALLOCATE( kice(jpnij), zwork(jpnij), STAT=ierr )
2113	IF( ierr /= 0 ) THEN
2114	WRITE(kumout, cform_err)
2115	WRITE(kumout,*) 'mpp_ini_ice : failed to allocate 2, 1D arrays (jpnij in length)'
2116	CALL mppstop
2117	ENDIF
2118
2119	! Look for how many procs with sea-ice
2120	!
2121	kice = 0
2122	DO jjproc = 1, jpnij
2123	IF( jjproc == narea .AND. pindic .GT. 0 ) kice(jjproc) = 1
2124	END DO
2125	!
2126	zwork = 0
2127	CALL MPI_ALLREDUCE( kice, zwork, jpnij, mpi_integer, mpi_sum, mpi_comm_opa, ierr )
2128	ndim_rank_ice = SUM( zwork )
2129
2130	! Allocate the right size to nrank_north
2131	IF( ALLOCATED ( nrank_ice ) ) DEALLOCATE( nrank_ice )
2132	ALLOCATE( nrank_ice(ndim_rank_ice) )
2133	!
2134	ii = 0
2135	nrank_ice = 0
2136	DO jjproc = 1, jpnij
2137	IF( zwork(jjproc) == 1) THEN
2138	ii = ii + 1
2139	nrank_ice(ii) = jjproc -1
2140	ENDIF
2141	END DO
2142
2143	! Create the world group
2144	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_iworld, ierr )
2145
2146	! Create the ice group from the world group
2147	CALL MPI_GROUP_INCL( ngrp_iworld, ndim_rank_ice, nrank_ice, ngrp_ice, ierr )
2148
2149	! Create the ice communicator , ie the pool of procs with sea-ice
2150	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_ice, ncomm_ice, ierr )
2151
2152	! Find proc number in the world of proc 0 in the north
2153	! The following line seems to be useless, we just comment & keep it as reminder
2154	! CALL MPI_GROUP_TRANSLATE_RANKS(ngrp_ice,1,0,ngrp_iworld,n_ice_root,ierr)
2155	!
2156	CALL MPI_GROUP_FREE(ngrp_ice, ierr)
2157	CALL MPI_GROUP_FREE(ngrp_iworld, ierr)
2158
2159	DEALLOCATE(kice, zwork)
2160	!
2161	END SUBROUTINE mpp_ini_ice
2162
2163
2164	SUBROUTINE mpp_ini_znl( kumout )
2165	!!----------------------------------------------------------------------
2166	!! * routine mpp_ini_znl *
2167	!!
2168	!! ** Purpose : Initialize special communicator for computing zonal sum
2169	!!
2170	!! ** Method : - Look for processors in the same row
2171	!! - Put their number in nrank_znl
2172	!! - Create group for the znl processors
2173	!! - Create a communicator for znl processors
2174	!! - Determine if processor should write znl files
2175	!!
2176	!! ** output
2177	!! ndim_rank_znl = number of processors on the same row
2178	!! ngrp_znl = group ID for the znl processors
2179	!! ncomm_znl = communicator for the ice procs.
2180	!! n_znl_root = number (in the world) of proc 0 in the ice comm.
2181	!!
2182	!!----------------------------------------------------------------------
2183	INTEGER, INTENT(in) :: kumout ! ocean.output logical units
2184	!
2185	INTEGER :: jproc ! dummy loop integer
2186	INTEGER :: ierr, ii ! local integer
2187	INTEGER, ALLOCATABLE, DIMENSION(:) :: kwork
2188	!!----------------------------------------------------------------------
2189	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_world : ', ngrp_world
2190	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_world : ', mpi_comm_world
2191	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - mpi_comm_opa : ', mpi_comm_opa
2192	!
2193	ALLOCATE( kwork(jpnij), STAT=ierr )
2194	IF( ierr /= 0 ) THEN
2195	WRITE(kumout, cform_err)
2196	WRITE(kumout,*) 'mpp_ini_znl : failed to allocate 1D array of length jpnij'
2197	CALL mppstop
2198	ENDIF
2199
2200	IF( jpnj == 1 ) THEN
2201	ngrp_znl = ngrp_world
2202	ncomm_znl = mpi_comm_opa
2203	ELSE
2204	!
2205	CALL MPI_ALLGATHER ( njmpp, 1, mpi_integer, kwork, 1, mpi_integer, mpi_comm_opa, ierr )
2206	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - kwork pour njmpp : ', kwork
2207	!-$$ CALL flush(numout)
2208	!
2209	! Count number of processors on the same row
2210	ndim_rank_znl = 0
2211	DO jproc=1,jpnij
2212	IF ( kwork(jproc) == njmpp ) THEN
2213	ndim_rank_znl = ndim_rank_znl + 1
2214	ENDIF
2215	END DO
2216	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ndim_rank_znl : ', ndim_rank_znl
2217	!-$$ CALL flush(numout)
2218	! Allocate the right size to nrank_znl
2219	IF (ALLOCATED (nrank_znl)) DEALLOCATE(nrank_znl)
2220	ALLOCATE(nrank_znl(ndim_rank_znl))
2221	ii = 0
2222	nrank_znl (:) = 0
2223	DO jproc=1,jpnij
2224	IF ( kwork(jproc) == njmpp) THEN
2225	ii = ii + 1
2226	nrank_znl(ii) = jproc -1
2227	ENDIF
2228	END DO
2229	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - nrank_znl : ', nrank_znl
2230	!-$$ CALL flush(numout)
2231
2232	! Create the opa group
2233	CALL MPI_COMM_GROUP(mpi_comm_opa,ngrp_opa,ierr)
2234	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_opa : ', ngrp_opa
2235	!-$$ CALL flush(numout)
2236
2237	! Create the znl group from the opa group
2238	CALL MPI_GROUP_INCL ( ngrp_opa, ndim_rank_znl, nrank_znl, ngrp_znl, ierr )
2239	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ngrp_znl ', ngrp_znl
2240	!-$$ CALL flush(numout)
2241
2242	! Create the znl communicator from the opa communicator, ie the pool of procs in the same row
2243	CALL MPI_COMM_CREATE ( mpi_comm_opa, ngrp_znl, ncomm_znl, ierr )
2244	!-$$ WRITE (numout,*) 'mpp_ini_znl ', nproc, ' - ncomm_znl ', ncomm_znl
2245	!-$$ CALL flush(numout)
2246	!
2247	END IF
2248
2249	! Determines if processor if the first (starting from i=1) on the row
2250	IF ( jpni == 1 ) THEN
2251	l_znl_root = .TRUE.
2252	ELSE
2253	l_znl_root = .FALSE.
2254	kwork (1) = nimpp
2255	CALL mpp_min ( kwork(1), kcom = ncomm_znl)
2256	IF ( nimpp == kwork(1)) l_znl_root = .TRUE.
2257	END IF
2258
2259	DEALLOCATE(kwork)
2260
2261	END SUBROUTINE mpp_ini_znl
2262
2263
2264	SUBROUTINE mpp_ini_north
2265	!!----------------------------------------------------------------------
2266	!! * routine mpp_ini_north *
2267	!!
2268	!! ** Purpose : Initialize special communicator for north folding
2269	!! condition together with global variables needed in the mpp folding
2270	!!
2271	!! ** Method : - Look for northern processors
2272	!! - Put their number in nrank_north
2273	!! - Create groups for the world processors and the north processors
2274	!! - Create a communicator for northern processors
2275	!!
2276	!! ** output
2277	!! njmppmax = njmpp for northern procs
2278	!! ndim_rank_north = number of processors in the northern line
2279	!! nrank_north (ndim_rank_north) = number of the northern procs.
2280	!! ngrp_world = group ID for the world processors
2281	!! ngrp_north = group ID for the northern processors
2282	!! ncomm_north = communicator for the northern procs.
2283	!! north_root = number (in the world) of proc 0 in the northern comm.
2284	!!
2285	!!----------------------------------------------------------------------
2286	INTEGER :: ierr
2287	INTEGER :: jjproc
2288	INTEGER :: ii, ji
2289	!!----------------------------------------------------------------------
2290	!
2291	njmppmax = MAXVAL( njmppt )
2292	!
2293	! Look for how many procs on the northern boundary
2294	ndim_rank_north = 0
2295	DO jjproc = 1, jpnij
2296	IF( njmppt(jjproc) == njmppmax ) ndim_rank_north = ndim_rank_north + 1
2297	END DO
2298	!
2299	! Allocate the right size to nrank_north
2300	IF (ALLOCATED (nrank_north)) DEALLOCATE(nrank_north)
2301	ALLOCATE( nrank_north(ndim_rank_north) )
2302
2303	! Fill the nrank_north array with proc. number of northern procs.
2304	! Note : the rank start at 0 in MPI
2305	ii = 0
2306	DO ji = 1, jpnij
2307	IF ( njmppt(ji) == njmppmax ) THEN
2308	ii=ii+1
2309	nrank_north(ii)=ji-1
2310	END IF
2311	END DO
2312	!
2313	! create the world group
2314	CALL MPI_COMM_GROUP( mpi_comm_opa, ngrp_world, ierr )
2315	!
2316	! Create the North group from the world group
2317	CALL MPI_GROUP_INCL( ngrp_world, ndim_rank_north, nrank_north, ngrp_north, ierr )
2318	!
2319	! Create the North communicator , ie the pool of procs in the north group
2320	CALL MPI_COMM_CREATE( mpi_comm_opa, ngrp_north, ncomm_north, ierr )
2321	!
2322	END SUBROUTINE mpp_ini_north
2323
2324
2325	SUBROUTINE mpp_lbc_north_3d( pt3d, cd_type, psgn )
2326	!!---------------------------------------------------------------------
2327	!! * routine mpp_lbc_north_3d *
2328	!!
2329	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2330	!! in mpp configuration in case of jpn1 > 1
2331	!!
2332	!! ** Method : North fold condition and mpp with more than one proc
2333	!! in i-direction require a specific treatment. We gather
2334	!! the 4 northern lines of the global domain on 1 processor
2335	!! and apply lbc north-fold on this sub array. Then we
2336	!! scatter the north fold array back to the processors.
2337	!!
2338	!!----------------------------------------------------------------------
2339	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pt3d ! 3D array on which the b.c. is applied
2340	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2341	! ! = T , U , V , F or W gridpoints
2342	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2343	!! ! = 1. , the sign is kept
2344	INTEGER :: ji, jj, jr, jk
2345	INTEGER :: ierr, itaille, ildi, ilei, iilb
2346	INTEGER :: ijpj, ijpjm1, ij, iproc
2347	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2348	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2349	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for mpi_isend when avoiding mpi_allgather
2350	! ! Workspace for message transfers avoiding mpi_allgather
2351	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztab
2352	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2353	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: znorthgloio
2354	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztabl, ztabr
2355
2356	INTEGER :: istatus(mpi_status_size)
2357	INTEGER :: iflag
2358	!!----------------------------------------------------------------------
2359	!
2360	ALLOCATE( ztab(jpiglo,4,jpk) , znorthloc(jpi,4,jpk), zfoldwk(jpi,4,jpk), znorthgloio(jpi,4,jpk,jpni) )
2361	ALLOCATE( ztabl(jpi,4,jpk), ztabr(jpi*jpmaxngh, 4, jpk) )
2362
2363	ijpj = 4
2364	ijpjm1 = 3
2365	!
2366	znorthloc(:,:,:) = 0
2367	DO jk = 1, jpk
2368	DO jj = nlcj - ijpj +1, nlcj ! put in xnorthloc the last 4 jlines of pt3d
2369	ij = jj - nlcj + ijpj
2370	znorthloc(:,ij,jk) = pt3d(:,jj,jk)
2371	END DO
2372	END DO
2373	!
2374	! ! Build in procs of ncomm_north the znorthgloio
2375	itaille = jpi * jpk * ijpj
2376
2377	IF ( l_north_nogather ) THEN
2378	!
2379	ztabr(:,:,:) = 0
2380	ztabl(:,:,:) = 0
2381
2382	DO jk = 1, jpk
2383	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2384	ij = jj - nlcj + ijpj
2385	DO ji = nfsloop, nfeloop
2386	ztabl(ji,ij,jk) = pt3d(ji,jj,jk)
2387	END DO
2388	END DO
2389	END DO
2390
2391	DO jr = 1,nsndto
2392	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2393	CALL mppsend( 5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr) )
2394	ENDIF
2395	END DO
2396	DO jr = 1,nsndto
2397	iproc = nfipproc(isendto(jr),jpnj)
2398	IF(iproc .ne. -1) THEN
2399	ilei = nleit (iproc+1)
2400	ildi = nldit (iproc+1)
2401	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2402	ENDIF
2403	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2404	CALL mpprecv(5, zfoldwk, itaille, iproc)
2405	DO jk = 1, jpk
2406	DO jj = 1, ijpj
2407	DO ji = ildi, ilei
2408	ztabr(iilb+ji,jj,jk) = zfoldwk(ji,jj,jk)
2409	END DO
2410	END DO
2411	END DO
2412	ELSE IF (iproc .eq. (narea-1)) THEN
2413	DO jk = 1, jpk
2414	DO jj = 1, ijpj
2415	DO ji = ildi, ilei
2416	ztabr(iilb+ji,jj,jk) = pt3d(ji,nlcj-ijpj+jj,jk)
2417	END DO
2418	END DO
2419	END DO
2420	ENDIF
2421	END DO
2422	IF (l_isend) THEN
2423	DO jr = 1,nsndto
2424	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2425	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2426	ENDIF
2427	END DO
2428	ENDIF
2429	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2430	DO jk = 1, jpk
2431	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2432	ij = jj - nlcj + ijpj
2433	DO ji= 1, nlci
2434	pt3d(ji,jj,jk) = ztabl(ji,ij,jk)
2435	END DO
2436	END DO
2437	END DO
2438	!
2439
2440	ELSE
2441	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2442	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2443	!
2444	ztab(:,:,:) = 0.e0
2445	DO jr = 1, ndim_rank_north ! recover the global north array
2446	iproc = nrank_north(jr) + 1
2447	ildi = nldit (iproc)
2448	ilei = nleit (iproc)
2449	iilb = nimppt(iproc)
2450	DO jk = 1, jpk
2451	DO jj = 1, ijpj
2452	DO ji = ildi, ilei
2453	ztab(ji+iilb-1,jj,jk) = znorthgloio(ji,jj,jk,jr)
2454	END DO
2455	END DO
2456	END DO
2457	END DO
2458	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2459	!
2460	DO jk = 1, jpk
2461	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt3d
2462	ij = jj - nlcj + ijpj
2463	DO ji= 1, nlci
2464	pt3d(ji,jj,jk) = ztab(ji+nimpp-1,ij,jk)
2465	END DO
2466	END DO
2467	END DO
2468	!
2469	ENDIF
2470	!
2471	! The ztab array has been either:
2472	! a. Fully populated by the mpi_allgather operation or
2473	! b. Had the active points for this domain and northern neighbours populated
2474	! by peer to peer exchanges
2475	! Either way the array may be folded by lbc_nfd and the result for the span of
2476	! this domain will be identical.
2477	!
2478	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2479	DEALLOCATE( ztabl, ztabr )
2480	!
2481	END SUBROUTINE mpp_lbc_north_3d
2482
2483
2484	SUBROUTINE mpp_lbc_north_2d( pt2d, cd_type, psgn)
2485	!!---------------------------------------------------------------------
2486	!! * routine mpp_lbc_north_2d *
2487	!!
2488	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2489	!! in mpp configuration in case of jpn1 > 1 (for 2d array )
2490	!!
2491	!! ** Method : North fold condition and mpp with more than one proc
2492	!! in i-direction require a specific treatment. We gather
2493	!! the 4 northern lines of the global domain on 1 processor
2494	!! and apply lbc north-fold on this sub array. Then we
2495	!! scatter the north fold array back to the processors.
2496	!!
2497	!!----------------------------------------------------------------------
2498	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pt2d ! 2D array on which the b.c. is applied
2499	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt2d grid-points
2500	! ! = T , U , V , F or W gridpoints
2501	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2502	!! ! = 1. , the sign is kept
2503	INTEGER :: ji, jj, jr
2504	INTEGER :: ierr, itaille, ildi, ilei, iilb
2505	INTEGER :: ijpj, ijpjm1, ij, iproc
2506	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2507	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2508	INTEGER, DIMENSION(MPI_STATUS_SIZE):: ml_stat ! for mpi_isend when avoiding mpi_allgather
2509	! ! Workspace for message transfers avoiding mpi_allgather
2510	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab
2511	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2512	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio
2513	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztabl, ztabr
2514	INTEGER :: istatus(mpi_status_size)
2515	INTEGER :: iflag
2516	!!----------------------------------------------------------------------
2517	!
2518	ALLOCATE( ztab(jpiglo,4), znorthloc(jpi,4), zfoldwk(jpi,4), znorthgloio(jpi,4,jpni) )
2519	ALLOCATE( ztabl(jpi,4), ztabr(jpi*jpmaxngh, 4) )
2520	!
2521	ijpj = 4
2522	ijpjm1 = 3
2523	!
2524	DO jj = nlcj-ijpj+1, nlcj ! put in znorthloc the last 4 jlines of pt2d
2525	ij = jj - nlcj + ijpj
2526	znorthloc(:,ij) = pt2d(:,jj)
2527	END DO
2528
2529	! ! Build in procs of ncomm_north the znorthgloio
2530	itaille = jpi * ijpj
2531	IF ( l_north_nogather ) THEN
2532	!
2533	! Avoid the use of mpi_allgather by exchanging only with the processes already identified
2534	! (in nemo_northcomms) as being involved in this process' northern boundary exchange
2535	!
2536	ztabr(:,:) = 0
2537	ztabl(:,:) = 0
2538
2539	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2540	ij = jj - nlcj + ijpj
2541	DO ji = nfsloop, nfeloop
2542	ztabl(ji,ij) = pt2d(ji,jj)
2543	END DO
2544	END DO
2545
2546	DO jr = 1,nsndto
2547	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2548	CALL mppsend(5, znorthloc, itaille, nfipproc(isendto(jr),jpnj), ml_req_nf(jr))
2549	ENDIF
2550	END DO
2551	DO jr = 1,nsndto
2552	iproc = nfipproc(isendto(jr),jpnj)
2553	IF(iproc .ne. -1) THEN
2554	ilei = nleit (iproc+1)
2555	ildi = nldit (iproc+1)
2556	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2557	ENDIF
2558	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2559	CALL mpprecv(5, zfoldwk, itaille, iproc)
2560	DO jj = 1, ijpj
2561	DO ji = ildi, ilei
2562	ztabr(iilb+ji,jj) = zfoldwk(ji,jj)
2563	END DO
2564	END DO
2565	ELSE IF (iproc .eq. (narea-1)) THEN
2566	DO jj = 1, ijpj
2567	DO ji = ildi, ilei
2568	ztabr(iilb+ji,jj) = pt2d(ji,nlcj-ijpj+jj)
2569	END DO
2570	END DO
2571	ENDIF
2572	END DO
2573	IF (l_isend) THEN
2574	DO jr = 1,nsndto
2575	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2576	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2577	ENDIF
2578	END DO
2579	ENDIF
2580	CALL mpp_lbc_nfd( ztabl, ztabr, cd_type, psgn ) ! North fold boundary condition
2581	!
2582	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2583	ij = jj - nlcj + ijpj
2584	DO ji = 1, nlci
2585	pt2d(ji,jj) = ztabl(ji,ij)
2586	END DO
2587	END DO
2588	!
2589	ELSE
2590	CALL MPI_ALLGATHER( znorthloc , itaille, MPI_DOUBLE_PRECISION, &
2591	& znorthgloio, itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2592	!
2593	ztab(:,:) = 0.e0
2594	DO jr = 1, ndim_rank_north ! recover the global north array
2595	iproc = nrank_north(jr) + 1
2596	ildi = nldit (iproc)
2597	ilei = nleit (iproc)
2598	iilb = nimppt(iproc)
2599	DO jj = 1, ijpj
2600	DO ji = ildi, ilei
2601	ztab(ji+iilb-1,jj) = znorthgloio(ji,jj,jr)
2602	END DO
2603	END DO
2604	END DO
2605	CALL lbc_nfd( ztab, cd_type, psgn ) ! North fold boundary condition
2606	!
2607	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2608	ij = jj - nlcj + ijpj
2609	DO ji = 1, nlci
2610	pt2d(ji,jj) = ztab(ji+nimpp-1,ij)
2611	END DO
2612	END DO
2613	!
2614	ENDIF
2615	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2616	DEALLOCATE( ztabl, ztabr )
2617	!
2618	END SUBROUTINE mpp_lbc_north_2d
2619
2620	SUBROUTINE mpp_lbc_north_2d_multiple( pt2d_array, cd_type, psgn, num_fields)
2621	!!---------------------------------------------------------------------
2622	!! * routine mpp_lbc_north_2d *
2623	!!
2624	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2625	!! in mpp configuration in case of jpn1 > 1
2626	!! (for multiple 2d arrays )
2627	!!
2628	!! ** Method : North fold condition and mpp with more than one proc
2629	!! in i-direction require a specific treatment. We gather
2630	!! the 4 northern lines of the global domain on 1 processor
2631	!! and apply lbc north-fold on this sub array. Then we
2632	!! scatter the north fold array back to the processors.
2633	!!
2634	!!----------------------------------------------------------------------
2635	INTEGER , INTENT (in ) :: num_fields ! number of variables contained in pt2d
2636	TYPE( arrayptr ), DIMENSION(:) :: pt2d_array
2637	CHARACTER(len=1), DIMENSION(:), INTENT(in ) :: cd_type ! nature of pt2d grid-points
2638	! ! = T , U , V , F or W gridpoints
2639	REAL(wp), DIMENSION(:), INTENT(in ) :: psgn ! = -1. the sign change across the north fold
2640	!! ! = 1. , the sign is kept
2641	INTEGER :: ji, jj, jr, jk
2642	INTEGER :: ierr, itaille, ildi, ilei, iilb
2643	INTEGER :: ijpj, ijpjm1, ij, iproc
2644	INTEGER, DIMENSION (jpmaxngh) :: ml_req_nf !for mpi_isend when avoiding mpi_allgather
2645	INTEGER :: ml_err ! for mpi_isend when avoiding mpi_allgather
2646	INTEGER, DIMENSION(MPI_STATUS_SIZE):: ml_stat ! for mpi_isend when avoiding mpi_allgather
2647	! ! Workspace for message transfers avoiding mpi_allgather
2648	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztab
2649	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: znorthloc, zfoldwk
2650	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: znorthgloio
2651	REAL(wp), DIMENSION(:,:,:) , ALLOCATABLE :: ztabl, ztabr
2652	INTEGER :: istatus(mpi_status_size)
2653	INTEGER :: iflag
2654	!!----------------------------------------------------------------------
2655	!
2656	ALLOCATE( ztab(jpiglo,4,num_fields), znorthloc(jpi,4,num_fields), zfoldwk(jpi,4,num_fields), &
2657	& znorthgloio(jpi,4,num_fields,jpni) ) ! expanded to 3 dimensions
2658	ALLOCATE( ztabl(jpi,4,num_fields), ztabr(jpi*jpmaxngh, 4,num_fields) )
2659	!
2660	ijpj = 4
2661	ijpjm1 = 3
2662	!
2663
2664	DO jk = 1, num_fields
2665	DO jj = nlcj-ijpj+1, nlcj ! put in znorthloc the last 4 jlines of pt2d (for every variable)
2666	ij = jj - nlcj + ijpj
2667	znorthloc(:,ij,jk) = pt2d_array(jk)%pt2d(:,jj)
2668	END DO
2669	END DO
2670	! ! Build in procs of ncomm_north the znorthgloio
2671	itaille = jpi * ijpj
2672
2673	IF ( l_north_nogather ) THEN
2674	!
2675	! Avoid the use of mpi_allgather by exchanging only with the processes already identified
2676	! (in nemo_northcomms) as being involved in this process' northern boundary exchange
2677	!
2678	ztabr(:,:,:) = 0
2679	ztabl(:,:,:) = 0
2680
2681	DO jk = 1, num_fields
2682	DO jj = nlcj-ijpj+1, nlcj ! First put local values into the global array
2683	ij = jj - nlcj + ijpj
2684	DO ji = nfsloop, nfeloop
2685	ztabl(ji,ij,jk) = pt2d_array(jk)%pt2d(ji,jj)
2686	END DO
2687	END DO
2688	END DO
2689
2690	DO jr = 1,nsndto
2691	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2692	CALL mppsend(5, znorthloc, itaille*num_fields, nfipproc(isendto(jr),jpnj), ml_req_nf(jr)) ! Buffer expanded "num_fields" times
2693	ENDIF
2694	END DO
2695	DO jr = 1,nsndto
2696	iproc = nfipproc(isendto(jr),jpnj)
2697	IF(iproc .ne. -1) THEN
2698	ilei = nleit (iproc+1)
2699	ildi = nldit (iproc+1)
2700	iilb = nfiimpp(isendto(jr),jpnj) - nfiimpp(isendto(1),jpnj)
2701	ENDIF
2702	IF((iproc .ne. (narea-1)) .and. (iproc .ne. -1)) THEN
2703	CALL mpprecv(5, zfoldwk, itaille*num_fields, iproc) ! Buffer expanded "num_fields" times
2704	DO jk = 1 , num_fields
2705	DO jj = 1, ijpj
2706	DO ji = ildi, ilei
2707	ztabr(iilb+ji,jj,jk) = zfoldwk(ji,jj,jk) ! Modified to 3D
2708	END DO
2709	END DO
2710	END DO
2711	ELSE IF (iproc .eq. (narea-1)) THEN
2712	DO jk = 1, num_fields
2713	DO jj = 1, ijpj
2714	DO ji = ildi, ilei
2715	ztabr(iilb+ji,jj,jk) = pt2d_array(jk)%pt2d(ji,nlcj-ijpj+jj) ! Modified to 3D
2716	END DO
2717	END DO
2718	END DO
2719	ENDIF
2720	END DO
2721	IF (l_isend) THEN
2722	DO jr = 1,nsndto
2723	IF ((nfipproc(isendto(jr),jpnj) .ne. (narea-1)) .and. (nfipproc(isendto(jr),jpnj) .ne. -1)) THEN
2724	CALL mpi_wait(ml_req_nf(jr), ml_stat, ml_err)
2725	ENDIF
2726	END DO
2727	ENDIF
2728	!
2729	DO ji = 1, num_fields ! Loop to manage 3D variables
2730	CALL mpp_lbc_nfd( ztabl(:,:,ji), ztabr(:,:,ji), cd_type(ji), psgn(ji) ) ! North fold boundary condition
2731	END DO
2732	!
2733	DO jk = 1, num_fields
2734	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2735	ij = jj - nlcj + ijpj
2736	DO ji = 1, nlci
2737	pt2d_array(jk)%pt2d(ji,jj) = ztabl(ji,ij,jk) ! Modified to 3D
2738	END DO
2739	END DO
2740	END DO
2741
2742	!
2743	ELSE
2744	!
2745	CALL MPI_ALLGATHER( znorthloc , itaille*num_fields, MPI_DOUBLE_PRECISION, &
2746	& znorthgloio, itaille*num_fields, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2747	!
2748	ztab(:,:,:) = 0.e0
2749	DO jk = 1, num_fields
2750	DO jr = 1, ndim_rank_north ! recover the global north array
2751	iproc = nrank_north(jr) + 1
2752	ildi = nldit (iproc)
2753	ilei = nleit (iproc)
2754	iilb = nimppt(iproc)
2755	DO jj = 1, ijpj
2756	DO ji = ildi, ilei
2757	ztab(ji+iilb-1,jj,jk) = znorthgloio(ji,jj,jk,jr)
2758	END DO
2759	END DO
2760	END DO
2761	END DO
2762
2763	DO ji = 1, num_fields
2764	CALL lbc_nfd( ztab(:,:,ji), cd_type(ji), psgn(ji) ) ! North fold boundary condition
2765	END DO
2766	!
2767	DO jk = 1, num_fields
2768	DO jj = nlcj-ijpj+1, nlcj ! Scatter back to pt2d
2769	ij = jj - nlcj + ijpj
2770	DO ji = 1, nlci
2771	pt2d_array(jk)%pt2d(ji,jj) = ztab(ji+nimpp-1,ij,jk)
2772	END DO
2773	END DO
2774	END DO
2775	!
2776	!
2777	ENDIF
2778	DEALLOCATE( ztab, znorthloc, zfoldwk, znorthgloio )
2779	DEALLOCATE( ztabl, ztabr )
2780	!
2781	END SUBROUTINE mpp_lbc_north_2d_multiple
2782
2783	SUBROUTINE mpp_lbc_north_e( pt2d, cd_type, psgn)
2784	!!---------------------------------------------------------------------
2785	!! * routine mpp_lbc_north_2d *
2786	!!
2787	!! ** Purpose : Ensure proper north fold horizontal bondary condition
2788	!! in mpp configuration in case of jpn1 > 1 and for 2d
2789	!! array with outer extra halo
2790	!!
2791	!! ** Method : North fold condition and mpp with more than one proc
2792	!! in i-direction require a specific treatment. We gather
2793	!! the 4+2*jpr2dj northern lines of the global domain on 1
2794	!! processor and apply lbc north-fold on this sub array.
2795	!! Then we scatter the north fold array back to the processors.
2796	!!
2797	!!----------------------------------------------------------------------
2798	REAL(wp), DIMENSION(1-jpr2di:jpi+jpr2di,1-jpr2dj:jpj+jpr2dj), INTENT(inout) :: pt2d ! 2D array with extra halo
2799	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
2800	! ! = T , U , V , F or W -points
2801	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
2802	!! ! north fold, = 1. otherwise
2803	INTEGER :: ji, jj, jr
2804	INTEGER :: ierr, itaille, ildi, ilei, iilb
2805	INTEGER :: ijpj, ij, iproc
2806	!
2807	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
2808	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
2809
2810	!!----------------------------------------------------------------------
2811	!
2812	ALLOCATE( ztab_e(jpiglo,4+2jpr2dj), znorthloc_e(jpi,4+2jpr2dj), znorthgloio_e(jpi,4+2*jpr2dj,jpni) )
2813
2814	!
2815	ijpj=4
2816	ztab_e(:,:) = 0.e0
2817
2818	ij=0
2819	! put in znorthloc_e the last 4 jlines of pt2d
2820	DO jj = nlcj - ijpj + 1 - jpr2dj, nlcj +jpr2dj
2821	ij = ij + 1
2822	DO ji = 1, jpi
2823	znorthloc_e(ji,ij)=pt2d(ji,jj)
2824	END DO
2825	END DO
2826	!
2827	itaille = jpi * ( ijpj + 2 * jpr2dj )
2828	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
2829	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
2830	!
2831	DO jr = 1, ndim_rank_north ! recover the global north array
2832	iproc = nrank_north(jr) + 1
2833	ildi = nldit (iproc)
2834	ilei = nleit (iproc)
2835	iilb = nimppt(iproc)
2836	DO jj = 1, ijpj+2*jpr2dj
2837	DO ji = ildi, ilei
2838	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
2839	END DO
2840	END DO
2841	END DO
2842
2843
2844	! 2. North-Fold boundary conditions
2845	! ----------------------------------
2846	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = jpr2dj )
2847
2848	ij = jpr2dj
2849	!! Scatter back to pt2d
2850	DO jj = nlcj - ijpj + 1 , nlcj +jpr2dj
2851	ij = ij +1
2852	DO ji= 1, nlci
2853	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
2854	END DO
2855	END DO
2856	!
2857	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
2858	!
2859	END SUBROUTINE mpp_lbc_north_e
2860
2861	SUBROUTINE mpp_lnk_bdy_3d( ptab, cd_type, psgn, ib_bdy )
2862	!!----------------------------------------------------------------------
2863	!! * routine mpp_lnk_bdy_3d *
2864	!!
2865	!! ** Purpose : Message passing management
2866	!!
2867	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
2868	!! between processors following neighboring subdomains.
2869	!! domain parameters
2870	!! nlci : first dimension of the local subdomain
2871	!! nlcj : second dimension of the local subdomain
2872	!! nbondi_bdy : mark for "east-west local boundary"
2873	!! nbondj_bdy : mark for "north-south local boundary"
2874	!! noea : number for local neighboring processors
2875	!! nowe : number for local neighboring processors
2876	!! noso : number for local neighboring processors
2877	!! nono : number for local neighboring processors
2878	!!
2879	!! ** Action : ptab with update value at its periphery
2880	!!
2881	!!----------------------------------------------------------------------
2882	REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
2883	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
2884	! ! = T , U , V , F , W points
2885	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
2886	! ! = 1. , the sign is kept
2887	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
2888	!
2889	INTEGER :: ji, jj, jk, jl ! dummy loop indices
2890	INTEGER :: imigr, iihom, ijhom ! local integers
2891	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
2892	REAL(wp) :: zland ! local scalar
2893	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
2894	!
2895	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ns, zt3sn ! 3d for north-south & south-north
2896	REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: zt3ew, zt3we ! 3d for east-west & west-east
2897	!!----------------------------------------------------------------------
2898
2899	ALLOCATE( zt3ns(jpi,jprecj,jpk,2), zt3sn(jpi,jprecj,jpk,2), &
2900	& zt3ew(jpj,jpreci,jpk,2), zt3we(jpj,jpreci,jpk,2) )
2901
2902	zland = 0.e0
2903
2904	! 1. standard boundary treatment
2905	! ------------------------------
2906
2907	! ! East-West boundaries
2908	! !* Cyclic east-west
2909
2910	IF( nbondi == 2) THEN
2911	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
2912	ptab( 1 ,:,:) = ptab(jpim1,:,:)
2913	ptab(jpi,:,:) = ptab( 2 ,:,:)
2914	ELSE
2915	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2916	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2917	ENDIF
2918	ELSEIF(nbondi == -1) THEN
2919	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:,:) = zland ! south except F-point
2920	ELSEIF(nbondi == 1) THEN
2921	ptab(nlci-jpreci+1:jpi ,:,:) = zland ! north
2922	ENDIF !* closed
2923
2924	IF (nbondj == 2 .OR. nbondj == -1) THEN
2925	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj,:) = zland ! south except F-point
2926	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
2927	ptab(:,nlcj-jprecj+1:jpj ,:) = zland ! north
2928	ENDIF
2929
2930	!
2931
2932	! 2. East and west directions exchange
2933	! ------------------------------------
2934	! we play with the neigbours AND the row number because of the periodicity
2935	!
2936	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
2937	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
2938	iihom = nlci-nreci
2939	DO jl = 1, jpreci
2940	zt3ew(:,jl,:,1) = ptab(jpreci+jl,:,:)
2941	zt3we(:,jl,:,1) = ptab(iihom +jl,:,:)
2942	END DO
2943	END SELECT
2944	!
2945	! ! Migrations
2946	imigr = jpreci * jpj * jpk
2947	!
2948	SELECT CASE ( nbondi_bdy(ib_bdy) )
2949	CASE ( -1 )
2950	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req1 )
2951	CASE ( 0 )
2952	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2953	CALL mppsend( 2, zt3we(1,1,1,1), imigr, noea, ml_req2 )
2954	CASE ( 1 )
2955	CALL mppsend( 1, zt3ew(1,1,1,1), imigr, nowe, ml_req1 )
2956	END SELECT
2957	!
2958	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2959	CASE ( -1 )
2960	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2961	CASE ( 0 )
2962	CALL mpprecv( 1, zt3ew(1,1,1,2), imigr, noea )
2963	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2964	CASE ( 1 )
2965	CALL mpprecv( 2, zt3we(1,1,1,2), imigr, nowe )
2966	END SELECT
2967	!
2968	SELECT CASE ( nbondi_bdy(ib_bdy) )
2969	CASE ( -1 )
2970	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2971	CASE ( 0 )
2972	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2973	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
2974	CASE ( 1 )
2975	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
2976	END SELECT
2977	!
2978	! ! Write Dirichlet lateral conditions
2979	iihom = nlci-jpreci
2980	!
2981	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
2982	CASE ( -1 )
2983	DO jl = 1, jpreci
2984	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
2985	END DO
2986	CASE ( 0 )
2987	DO jl = 1, jpreci
2988	ptab(jl ,:,:) = zt3we(:,jl,:,2)
2989	ptab(iihom+jl,:,:) = zt3ew(:,jl,:,2)
2990	END DO
2991	CASE ( 1 )
2992	DO jl = 1, jpreci
2993	ptab(jl ,:,:) = zt3we(:,jl,:,2)
2994	END DO
2995	END SELECT
2996
2997
2998	! 3. North and south directions
2999	! -----------------------------
3000	! always closed : we play only with the neigbours
3001	!
3002	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
3003	ijhom = nlcj-nrecj
3004	DO jl = 1, jprecj
3005	zt3sn(:,jl,:,1) = ptab(:,ijhom +jl,:)
3006	zt3ns(:,jl,:,1) = ptab(:,jprecj+jl,:)
3007	END DO
3008	ENDIF
3009	!
3010	! ! Migrations
3011	imigr = jprecj * jpi * jpk
3012	!
3013	SELECT CASE ( nbondj_bdy(ib_bdy) )
3014	CASE ( -1 )
3015	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req1 )
3016	CASE ( 0 )
3017	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
3018	CALL mppsend( 4, zt3sn(1,1,1,1), imigr, nono, ml_req2 )
3019	CASE ( 1 )
3020	CALL mppsend( 3, zt3ns(1,1,1,1), imigr, noso, ml_req1 )
3021	END SELECT
3022	!
3023	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3024	CASE ( -1 )
3025	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
3026	CASE ( 0 )
3027	CALL mpprecv( 3, zt3ns(1,1,1,2), imigr, nono )
3028	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
3029	CASE ( 1 )
3030	CALL mpprecv( 4, zt3sn(1,1,1,2), imigr, noso )
3031	END SELECT
3032	!
3033	SELECT CASE ( nbondj_bdy(ib_bdy) )
3034	CASE ( -1 )
3035	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3036	CASE ( 0 )
3037	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3038	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3039	CASE ( 1 )
3040	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3041	END SELECT
3042	!
3043	! ! Write Dirichlet lateral conditions
3044	ijhom = nlcj-jprecj
3045	!
3046	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3047	CASE ( -1 )
3048	DO jl = 1, jprecj
3049	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
3050	END DO
3051	CASE ( 0 )
3052	DO jl = 1, jprecj
3053	ptab(:,jl ,:) = zt3sn(:,jl,:,2)
3054	ptab(:,ijhom+jl,:) = zt3ns(:,jl,:,2)
3055	END DO
3056	CASE ( 1 )
3057	DO jl = 1, jprecj
3058	ptab(:,jl,:) = zt3sn(:,jl,:,2)
3059	END DO
3060	END SELECT
3061
3062
3063	! 4. north fold treatment
3064	! -----------------------
3065	!
3066	IF( npolj /= 0) THEN
3067	!
3068	SELECT CASE ( jpni )
3069	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
3070	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
3071	END SELECT
3072	!
3073	ENDIF
3074	!
3075	DEALLOCATE( zt3ns, zt3sn, zt3ew, zt3we )
3076	!
3077	END SUBROUTINE mpp_lnk_bdy_3d
3078
3079
3080	SUBROUTINE mpp_lnk_bdy_2d( ptab, cd_type, psgn, ib_bdy )
3081	!!----------------------------------------------------------------------
3082	!! * routine mpp_lnk_bdy_2d *
3083	!!
3084	!! ** Purpose : Message passing management
3085	!!
3086	!! ** Method : Use mppsend and mpprecv function for passing BDY boundaries
3087	!! between processors following neighboring subdomains.
3088	!! domain parameters
3089	!! nlci : first dimension of the local subdomain
3090	!! nlcj : second dimension of the local subdomain
3091	!! nbondi_bdy : mark for "east-west local boundary"
3092	!! nbondj_bdy : mark for "north-south local boundary"
3093	!! noea : number for local neighboring processors
3094	!! nowe : number for local neighboring processors
3095	!! noso : number for local neighboring processors
3096	!! nono : number for local neighboring processors
3097	!!
3098	!! ** Action : ptab with update value at its periphery
3099	!!
3100	!!----------------------------------------------------------------------
3101	REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: ptab ! 3D array on which the boundary condition is applied
3102	CHARACTER(len=1) , INTENT(in ) :: cd_type ! define the nature of ptab array grid-points
3103	! ! = T , U , V , F , W points
3104	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the north fold boundary
3105	! ! = 1. , the sign is kept
3106	INTEGER , INTENT(in ) :: ib_bdy ! BDY boundary set
3107	!
3108	INTEGER :: ji, jj, jl ! dummy loop indices
3109	INTEGER :: imigr, iihom, ijhom ! local integers
3110	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
3111	REAL(wp) :: zland
3112	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
3113	!
3114	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ns, zt2sn ! 2d for north-south & south-north
3115	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zt2ew, zt2we ! 2d for east-west & west-east
3116	!!----------------------------------------------------------------------
3117
3118	ALLOCATE( zt2ns(jpi,jprecj,2), zt2sn(jpi,jprecj,2), &
3119	& zt2ew(jpj,jpreci,2), zt2we(jpj,jpreci,2) )
3120
3121	zland = 0._wp
3122
3123	! 1. standard boundary treatment
3124	! ------------------------------
3125
3126	! ! East-West boundaries
3127	! !* Cyclic east-west
3128
3129	IF( nbondi == 2) THEN
3130	IF (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN
3131	ptab( 1 ,:) = ptab(jpim1,:)
3132	ptab(jpi,:) = ptab( 2 ,:)
3133	ELSE
3134	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
3135	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
3136	ENDIF
3137	ELSEIF(nbondi == -1) THEN
3138	IF( .NOT. cd_type == 'F' ) ptab( 1 :jpreci,:) = zland ! south except F-point
3139	ELSEIF(nbondi == 1) THEN
3140	ptab(nlci-jpreci+1:jpi ,:) = zland ! north
3141	ENDIF !* closed
3142
3143	IF (nbondj == 2 .OR. nbondj == -1) THEN
3144	IF( .NOT. cd_type == 'F' ) ptab(:, 1 :jprecj) = zland ! south except F-point
3145	ELSEIF (nbondj == 2 .OR. nbondj == 1) THEN
3146	ptab(:,nlcj-jprecj+1:jpj) = zland ! north
3147	ENDIF
3148
3149	!
3150
3151	! 2. East and west directions exchange
3152	! ------------------------------------
3153	! we play with the neigbours AND the row number because of the periodicity
3154	!
3155	SELECT CASE ( nbondi_bdy(ib_bdy) ) ! Read Dirichlet lateral conditions
3156	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
3157	iihom = nlci-nreci
3158	DO jl = 1, jpreci
3159	zt2ew(:,jl,1) = ptab(jpreci+jl,:)
3160	zt2we(:,jl,1) = ptab(iihom +jl,:)
3161	END DO
3162	END SELECT
3163	!
3164	! ! Migrations
3165	imigr = jpreci * jpj
3166	!
3167	SELECT CASE ( nbondi_bdy(ib_bdy) )
3168	CASE ( -1 )
3169	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req1 )
3170	CASE ( 0 )
3171	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
3172	CALL mppsend( 2, zt2we(1,1,1), imigr, noea, ml_req2 )
3173	CASE ( 1 )
3174	CALL mppsend( 1, zt2ew(1,1,1), imigr, nowe, ml_req1 )
3175	END SELECT
3176	!
3177	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3178	CASE ( -1 )
3179	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3180	CASE ( 0 )
3181	CALL mpprecv( 1, zt2ew(1,1,2), imigr, noea )
3182	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3183	CASE ( 1 )
3184	CALL mpprecv( 2, zt2we(1,1,2), imigr, nowe )
3185	END SELECT
3186	!
3187	SELECT CASE ( nbondi_bdy(ib_bdy) )
3188	CASE ( -1 )
3189	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3190	CASE ( 0 )
3191	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3192	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3193	CASE ( 1 )
3194	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3195	END SELECT
3196	!
3197	! ! Write Dirichlet lateral conditions
3198	iihom = nlci-jpreci
3199	!
3200	SELECT CASE ( nbondi_bdy_b(ib_bdy) )
3201	CASE ( -1 )
3202	DO jl = 1, jpreci
3203	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3204	END DO
3205	CASE ( 0 )
3206	DO jl = 1, jpreci
3207	ptab(jl ,:) = zt2we(:,jl,2)
3208	ptab(iihom+jl,:) = zt2ew(:,jl,2)
3209	END DO
3210	CASE ( 1 )
3211	DO jl = 1, jpreci
3212	ptab(jl ,:) = zt2we(:,jl,2)
3213	END DO
3214	END SELECT
3215
3216
3217	! 3. North and south directions
3218	! -----------------------------
3219	! always closed : we play only with the neigbours
3220	!
3221	IF( nbondj_bdy(ib_bdy) /= 2 ) THEN ! Read Dirichlet lateral conditions
3222	ijhom = nlcj-nrecj
3223	DO jl = 1, jprecj
3224	zt2sn(:,jl,1) = ptab(:,ijhom +jl)
3225	zt2ns(:,jl,1) = ptab(:,jprecj+jl)
3226	END DO
3227	ENDIF
3228	!
3229	! ! Migrations
3230	imigr = jprecj * jpi
3231	!
3232	SELECT CASE ( nbondj_bdy(ib_bdy) )
3233	CASE ( -1 )
3234	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req1 )
3235	CASE ( 0 )
3236	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3237	CALL mppsend( 4, zt2sn(1,1,1), imigr, nono, ml_req2 )
3238	CASE ( 1 )
3239	CALL mppsend( 3, zt2ns(1,1,1), imigr, noso, ml_req1 )
3240	END SELECT
3241	!
3242	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3243	CASE ( -1 )
3244	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3245	CASE ( 0 )
3246	CALL mpprecv( 3, zt2ns(1,1,2), imigr, nono )
3247	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3248	CASE ( 1 )
3249	CALL mpprecv( 4, zt2sn(1,1,2), imigr, noso )
3250	END SELECT
3251	!
3252	SELECT CASE ( nbondj_bdy(ib_bdy) )
3253	CASE ( -1 )
3254	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3255	CASE ( 0 )
3256	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3257	IF(l_isend) CALL mpi_wait(ml_req2, ml_stat, ml_err)
3258	CASE ( 1 )
3259	IF(l_isend) CALL mpi_wait(ml_req1, ml_stat, ml_err)
3260	END SELECT
3261	!
3262	! ! Write Dirichlet lateral conditions
3263	ijhom = nlcj-jprecj
3264	!
3265	SELECT CASE ( nbondj_bdy_b(ib_bdy) )
3266	CASE ( -1 )
3267	DO jl = 1, jprecj
3268	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3269	END DO
3270	CASE ( 0 )
3271	DO jl = 1, jprecj
3272	ptab(:,jl ) = zt2sn(:,jl,2)
3273	ptab(:,ijhom+jl) = zt2ns(:,jl,2)
3274	END DO
3275	CASE ( 1 )
3276	DO jl = 1, jprecj
3277	ptab(:,jl) = zt2sn(:,jl,2)
3278	END DO
3279	END SELECT
3280
3281
3282	! 4. north fold treatment
3283	! -----------------------
3284	!
3285	IF( npolj /= 0) THEN
3286	!
3287	SELECT CASE ( jpni )
3288	CASE ( 1 ) ; CALL lbc_nfd ( ptab, cd_type, psgn ) ! only 1 northern proc, no mpp
3289	CASE DEFAULT ; CALL mpp_lbc_north( ptab, cd_type, psgn ) ! for all northern procs.
3290	END SELECT
3291	!
3292	ENDIF
3293	!
3294	DEALLOCATE( zt2ns, zt2sn, zt2ew, zt2we )
3295	!
3296	END SUBROUTINE mpp_lnk_bdy_2d
3297
3298	SUBROUTINE mpi_init_opa( ldtxt, ksft, code )
3299	!!---------------------------------------------------------------------
3300	!! * routine mpp_init.opa *
3301	!!
3302	!! ** Purpose :: export and attach a MPI buffer for bsend
3303	!!
3304	!! ** Method :: define buffer size in namelist, if 0 no buffer attachment
3305	!! but classical mpi_init
3306	!!
3307	!! History :: 01/11 :: IDRIS initial version for IBM only
3308	!! 08/04 :: R. Benshila, generalisation
3309	!!---------------------------------------------------------------------
3310	CHARACTER(len=*),DIMENSION(:), INTENT( out) :: ldtxt
3311	INTEGER , INTENT(inout) :: ksft
3312	INTEGER , INTENT( out) :: code
3313	INTEGER :: ierr, ji
3314	LOGICAL :: mpi_was_called
3315	!!---------------------------------------------------------------------
3316	!
3317	CALL mpi_initialized( mpi_was_called, code ) ! MPI initialization
3318	IF ( code /= MPI_SUCCESS ) THEN
3319	DO ji = 1, SIZE(ldtxt)
3320	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3321	END DO
3322	WRITE(*, cform_err)
3323	WRITE(, ) ' lib_mpp: Error in routine mpi_initialized'
3324	CALL mpi_abort( mpi_comm_world, code, ierr )
3325	ENDIF
3326	!
3327	IF( .NOT. mpi_was_called ) THEN
3328	CALL mpi_init( code )
3329	CALL mpi_comm_dup( mpi_comm_world, mpi_comm_opa, code )
3330	IF ( code /= MPI_SUCCESS ) THEN
3331	DO ji = 1, SIZE(ldtxt)
3332	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3333	END DO
3334	WRITE(*, cform_err)
3335	WRITE(, ) ' lib_mpp: Error in routine mpi_comm_dup'
3336	CALL mpi_abort( mpi_comm_world, code, ierr )
3337	ENDIF
3338	ENDIF
3339	!
3340	IF( nn_buffer > 0 ) THEN
3341	WRITE(ldtxt(ksft),*) 'mpi_bsend, buffer allocation of : ', nn_buffer ; ksft = ksft + 1
3342	! Buffer allocation and attachment
3343	ALLOCATE( tampon(nn_buffer), stat = ierr )
3344	IF( ierr /= 0 ) THEN
3345	DO ji = 1, SIZE(ldtxt)
3346	IF( TRIM(ldtxt(ji)) /= '' ) WRITE(,) ldtxt(ji) ! control print of mynode
3347	END DO
3348	WRITE(*, cform_err)
3349	WRITE(, ) ' lib_mpp: Error in ALLOCATE', ierr
3350	CALL mpi_abort( mpi_comm_world, code, ierr )
3351	END IF
3352	CALL mpi_buffer_attach( tampon, nn_buffer, code )
3353	ENDIF
3354	!
3355	END SUBROUTINE mpi_init_opa
3356
3357	SUBROUTINE DDPDD_MPI (ydda, yddb, ilen, itype)
3358	!!---------------------------------------------------------------------
3359	!! Routine DDPDD_MPI: used by reduction operator MPI_SUMDD
3360	!!
3361	!! Modification of original codes written by David H. Bailey
3362	!! This subroutine computes yddb(i) = ydda(i)+yddb(i)
3363	!!---------------------------------------------------------------------
3364	INTEGER, INTENT(in) :: ilen, itype
3365	COMPLEX(wp), DIMENSION(ilen), INTENT(in) :: ydda
3366	COMPLEX(wp), DIMENSION(ilen), INTENT(inout) :: yddb
3367	!
3368	REAL(wp) :: zerr, zt1, zt2 ! local work variables
3369	INTEGER :: ji, ztmp ! local scalar
3370
3371	ztmp = itype ! avoid compilation warning
3372
3373	DO ji=1,ilen
3374	! Compute ydda + yddb using Knuth's trick.
3375	zt1 = real(ydda(ji)) + real(yddb(ji))
3376	zerr = zt1 - real(ydda(ji))
3377	zt2 = ((real(yddb(ji)) - zerr) + (real(ydda(ji)) - (zt1 - zerr))) &
3378	+ aimag(ydda(ji)) + aimag(yddb(ji))
3379
3380	! The result is zt1 + zt2, after normalization.
3381	yddb(ji) = cmplx ( zt1 + zt2, zt2 - ((zt1 + zt2) - zt1),wp )
3382	END DO
3383
3384	END SUBROUTINE DDPDD_MPI
3385
3386	SUBROUTINE mpp_lbc_north_icb( pt2d, cd_type, psgn, pr2dj)
3387	!!---------------------------------------------------------------------
3388	!! * routine mpp_lbc_north_icb *
3389	!!
3390	!! ** Purpose : Ensure proper north fold horizontal bondary condition
3391	!! in mpp configuration in case of jpn1 > 1 and for 2d
3392	!! array with outer extra halo
3393	!!
3394	!! ** Method : North fold condition and mpp with more than one proc
3395	!! in i-direction require a specific treatment. We gather
3396	!! the 4+2*jpr2dj northern lines of the global domain on 1
3397	!! processor and apply lbc north-fold on this sub array.
3398	!! Then we scatter the north fold array back to the processors.
3399	!! This version accounts for an extra halo with icebergs.
3400	!!
3401	!!----------------------------------------------------------------------
3402	REAL(wp), DIMENSION(:,:), INTENT(inout) :: pt2d ! 2D array with extra halo
3403	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of pt3d grid-points
3404	! ! = T , U , V , F or W -points
3405	REAL(wp) , INTENT(in ) :: psgn ! = -1. the sign change across the
3406	!! ! north fold, = 1. otherwise
3407	INTEGER, OPTIONAL , INTENT(in ) :: pr2dj
3408	INTEGER :: ji, jj, jr
3409	INTEGER :: ierr, itaille, ildi, ilei, iilb
3410	INTEGER :: ijpj, ij, iproc, ipr2dj
3411	!
3412	REAL(wp), DIMENSION(:,:) , ALLOCATABLE :: ztab_e, znorthloc_e
3413	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: znorthgloio_e
3414
3415	!!----------------------------------------------------------------------
3416	!
3417	ijpj=4
3418	IF( PRESENT(pr2dj) ) THEN ! use of additional halos
3419	ipr2dj = pr2dj
3420	ELSE
3421	ipr2dj = 0
3422	ENDIF
3423	ALLOCATE( ztab_e(jpiglo,4+2ipr2dj), znorthloc_e(jpi,4+2ipr2dj), znorthgloio_e(jpi,4+2*ipr2dj,jpni) )
3424
3425	!
3426	ztab_e(:,:) = 0.e0
3427
3428	ij=0
3429	! put in znorthloc_e the last 4 jlines of pt2d
3430	DO jj = nlcj - ijpj + 1 - ipr2dj, nlcj +ipr2dj
3431	ij = ij + 1
3432	DO ji = 1, jpi
3433	znorthloc_e(ji,ij)=pt2d(ji,jj)
3434	END DO
3435	END DO
3436	!
3437	itaille = jpi * ( ijpj + 2 * ipr2dj )
3438	CALL MPI_ALLGATHER( znorthloc_e(1,1) , itaille, MPI_DOUBLE_PRECISION, &
3439	& znorthgloio_e(1,1,1), itaille, MPI_DOUBLE_PRECISION, ncomm_north, ierr )
3440	!
3441	DO jr = 1, ndim_rank_north ! recover the global north array
3442	iproc = nrank_north(jr) + 1
3443	ildi = nldit (iproc)
3444	ilei = nleit (iproc)
3445	iilb = nimppt(iproc)
3446	DO jj = 1, ijpj+2*ipr2dj
3447	DO ji = ildi, ilei
3448	ztab_e(ji+iilb-1,jj) = znorthgloio_e(ji,jj,jr)
3449	END DO
3450	END DO
3451	END DO
3452
3453
3454	! 2. North-Fold boundary conditions
3455	! ----------------------------------
3456	CALL lbc_nfd( ztab_e(:,:), cd_type, psgn, pr2dj = ipr2dj )
3457
3458	ij = ipr2dj
3459	!! Scatter back to pt2d
3460	DO jj = nlcj - ijpj + 1 , nlcj +ipr2dj
3461	ij = ij +1
3462	DO ji= 1, nlci
3463	pt2d(ji,jj) = ztab_e(ji+nimpp-1,ij)
3464	END DO
3465	END DO
3466	!
3467	DEALLOCATE( ztab_e, znorthloc_e, znorthgloio_e )
3468	!
3469	END SUBROUTINE mpp_lbc_north_icb
3470
3471	SUBROUTINE mpp_lnk_2d_icb( pt2d, cd_type, psgn, jpri, jprj )
3472	!!----------------------------------------------------------------------
3473	!! * routine mpp_lnk_2d_icb *
3474	!!
3475	!! ** Purpose : Message passing manadgement for 2d array (with extra halo and icebergs)
3476	!!
3477	!! ** Method : Use mppsend and mpprecv function for passing mask
3478	!! between processors following neighboring subdomains.
3479	!! domain parameters
3480	!! nlci : first dimension of the local subdomain
3481	!! nlcj : second dimension of the local subdomain
3482	!! jpri : number of rows for extra outer halo
3483	!! jprj : number of columns for extra outer halo
3484	!! nbondi : mark for "east-west local boundary"
3485	!! nbondj : mark for "north-south local boundary"
3486	!! noea : number for local neighboring processors
3487	!! nowe : number for local neighboring processors
3488	!! noso : number for local neighboring processors
3489	!! nono : number for local neighboring processors
3490	!!
3491	!!----------------------------------------------------------------------
3492	INTEGER , INTENT(in ) :: jpri
3493	INTEGER , INTENT(in ) :: jprj
3494	REAL(wp), DIMENSION(1-jpri:jpi+jpri,1-jprj:jpj+jprj), INTENT(inout) :: pt2d ! 2D array with extra halo
3495	CHARACTER(len=1) , INTENT(in ) :: cd_type ! nature of ptab array grid-points
3496	! ! = T , U , V , F , W and I points
3497	REAL(wp) , INTENT(in ) :: psgn ! =-1 the sign change across the
3498	!! ! north boundary, = 1. otherwise
3499	INTEGER :: jl ! dummy loop indices
3500	INTEGER :: imigr, iihom, ijhom ! temporary integers
3501	INTEGER :: ipreci, iprecj ! temporary integers
3502	INTEGER :: ml_req1, ml_req2, ml_err ! for key_mpi_isend
3503	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: ml_stat ! for key_mpi_isend
3504	!!
3505	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dns
3506	REAL(wp), DIMENSION(1-jpri:jpi+jpri,jprecj+jprj,2) :: r2dsn
3507	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dwe
3508	REAL(wp), DIMENSION(1-jprj:jpj+jprj,jpreci+jpri,2) :: r2dew
3509	!!----------------------------------------------------------------------
3510
3511	ipreci = jpreci + jpri ! take into account outer extra 2D overlap area
3512	iprecj = jprecj + jprj
3513
3514
3515	! 1. standard boundary treatment
3516	! ------------------------------
3517	! Order matters Here !!!!
3518	!
3519	! ! East-West boundaries
3520	! !* Cyclic east-west
3521	IF( nbondi == 2 .AND. (nperio == 1 .OR. nperio == 4 .OR. nperio == 6) ) THEN
3522	pt2d(1-jpri: 1 ,:) = pt2d(jpim1-jpri: jpim1 ,:) ! east
3523	pt2d( jpi :jpi+jpri,:) = pt2d( 2 :2+jpri,:) ! west
3524	!
3525	ELSE !* closed
3526	IF( .NOT. cd_type == 'F' ) pt2d( 1-jpri :jpreci ,:) = 0.e0 ! south except at F-point
3527	pt2d(nlci-jpreci+1:jpi+jpri,:) = 0.e0 ! north
3528	ENDIF
3529	!
3530
3531	! north fold treatment
3532	! -----------------------
3533	IF( npolj /= 0 ) THEN
3534	!
3535	SELECT CASE ( jpni )
3536	CASE ( 1 ) ; CALL lbc_nfd ( pt2d(1:jpi,1:jpj+jprj), cd_type, psgn, pr2dj=jprj )
3537	CASE DEFAULT ; CALL mpp_lbc_north_icb( pt2d(1:jpi,1:jpj+jprj) , cd_type, psgn , pr2dj=jprj )
3538	END SELECT
3539	!
3540	ENDIF
3541
3542	! 2. East and west directions exchange
3543	! ------------------------------------
3544	! we play with the neigbours AND the row number because of the periodicity
3545	!
3546	SELECT CASE ( nbondi ) ! Read Dirichlet lateral conditions
3547	CASE ( -1, 0, 1 ) ! all exept 2 (i.e. close case)
3548	iihom = nlci-nreci-jpri
3549	DO jl = 1, ipreci
3550	r2dew(:,jl,1) = pt2d(jpreci+jl,:)
3551	r2dwe(:,jl,1) = pt2d(iihom +jl,:)
3552	END DO
3553	END SELECT
3554	!
3555	! ! Migrations
3556	imigr = ipreci * ( jpj + 2*jprj)
3557	!
3558	SELECT CASE ( nbondi )
3559	CASE ( -1 )
3560	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req1 )
3561	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3562	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3563	CASE ( 0 )
3564	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3565	CALL mppsend( 2, r2dwe(1-jprj,1,1), imigr, noea, ml_req2 )
3566	CALL mpprecv( 1, r2dew(1-jprj,1,2), imigr, noea )
3567	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3568	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3569	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3570	CASE ( 1 )
3571	CALL mppsend( 1, r2dew(1-jprj,1,1), imigr, nowe, ml_req1 )
3572	CALL mpprecv( 2, r2dwe(1-jprj,1,2), imigr, nowe )
3573	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3574	END SELECT
3575	!
3576	! ! Write Dirichlet lateral conditions
3577	iihom = nlci - jpreci
3578	!
3579	SELECT CASE ( nbondi )
3580	CASE ( -1 )
3581	DO jl = 1, ipreci
3582	pt2d(iihom+jl,:) = r2dew(:,jl,2)
3583	END DO
3584	CASE ( 0 )
3585	DO jl = 1, ipreci
3586	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3587	pt2d( iihom+jl,:) = r2dew(:,jl,2)
3588	END DO
3589	CASE ( 1 )
3590	DO jl = 1, ipreci
3591	pt2d(jl-jpri,:) = r2dwe(:,jl,2)
3592	END DO
3593	END SELECT
3594
3595
3596	! 3. North and south directions
3597	! -----------------------------
3598	! always closed : we play only with the neigbours
3599	!
3600	IF( nbondj /= 2 ) THEN ! Read Dirichlet lateral conditions
3601	ijhom = nlcj-nrecj-jprj
3602	DO jl = 1, iprecj
3603	r2dsn(:,jl,1) = pt2d(:,ijhom +jl)
3604	r2dns(:,jl,1) = pt2d(:,jprecj+jl)
3605	END DO
3606	ENDIF
3607	!
3608	! ! Migrations
3609	imigr = iprecj * ( jpi + 2*jpri )
3610	!
3611	SELECT CASE ( nbondj )
3612	CASE ( -1 )
3613	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req1 )
3614	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3615	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3616	CASE ( 0 )
3617	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3618	CALL mppsend( 4, r2dsn(1-jpri,1,1), imigr, nono, ml_req2 )
3619	CALL mpprecv( 3, r2dns(1-jpri,1,2), imigr, nono )
3620	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3621	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3622	IF(l_isend) CALL mpi_wait(ml_req2,ml_stat,ml_err)
3623	CASE ( 1 )
3624	CALL mppsend( 3, r2dns(1-jpri,1,1), imigr, noso, ml_req1 )
3625	CALL mpprecv( 4, r2dsn(1-jpri,1,2), imigr, noso )
3626	IF(l_isend) CALL mpi_wait(ml_req1,ml_stat,ml_err)
3627	END SELECT
3628	!
3629	! ! Write Dirichlet lateral conditions
3630	ijhom = nlcj - jprecj
3631	!
3632	SELECT CASE ( nbondj )
3633	CASE ( -1 )
3634	DO jl = 1, iprecj
3635	pt2d(:,ijhom+jl) = r2dns(:,jl,2)
3636	END DO
3637	CASE ( 0 )
3638	DO jl = 1, iprecj
3639	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3640	pt2d(:,ijhom+jl ) = r2dns(:,jl,2)
3641	END DO
3642	CASE ( 1 )
3643	DO jl = 1, iprecj
3644	pt2d(:,jl-jprj) = r2dsn(:,jl,2)
3645	END DO
3646	END SELECT
3647
3648	END SUBROUTINE mpp_lnk_2d_icb
3649	#else
3650	!!----------------------------------------------------------------------
3651	!! Default case: Dummy module share memory computing
3652	!!----------------------------------------------------------------------
3653	USE in_out_manager
3654
3655	INTERFACE mpp_sum
3656	MODULE PROCEDURE mpp_sum_a2s, mpp_sum_as, mpp_sum_ai, mpp_sum_s, mpp_sum_i, mppsum_realdd, mppsum_a_realdd
3657	END INTERFACE
3658	INTERFACE mpp_max
3659	MODULE PROCEDURE mppmax_a_int, mppmax_int, mppmax_a_real, mppmax_real
3660	END INTERFACE
3661	INTERFACE mpp_min
3662	MODULE PROCEDURE mppmin_a_int, mppmin_int, mppmin_a_real, mppmin_real
3663	END INTERFACE
3664	INTERFACE mpp_minloc
3665	MODULE PROCEDURE mpp_minloc2d ,mpp_minloc3d
3666	END INTERFACE
3667	INTERFACE mpp_maxloc
3668	MODULE PROCEDURE mpp_maxloc2d ,mpp_maxloc3d
3669	END INTERFACE
3670
3671	LOGICAL, PUBLIC, PARAMETER :: lk_mpp = .FALSE. !: mpp flag
3672	LOGICAL, PUBLIC :: ln_nnogather !: namelist control of northfold comms (needed here in case "key_mpp_mpi" is not used)
3673	INTEGER :: ncomm_ice
3674	INTEGER, PUBLIC :: mpi_comm_opa ! opa local communicator
3675	!!----------------------------------------------------------------------
3676	CONTAINS
3677
3678	INTEGER FUNCTION lib_mpp_alloc(kumout) ! Dummy function
3679	INTEGER, INTENT(in) :: kumout
3680	lib_mpp_alloc = 0
3681	END FUNCTION lib_mpp_alloc
3682
3683	FUNCTION mynode( ldtxt, ldname, kumnam_ref, knumnam_cfg, kumond , kstop, localComm ) RESULT (function_value)
3684	INTEGER, OPTIONAL , INTENT(in ) :: localComm
3685	CHARACTER(len=*),DIMENSION(:) :: ldtxt
3686	CHARACTER(len=*) :: ldname
3687	INTEGER :: kumnam_ref, knumnam_cfg , kumond , kstop
3688	IF( PRESENT( localComm ) ) mpi_comm_opa = localComm
3689	function_value = 0
3690	IF( .FALSE. ) ldtxt(:) = 'never done'
3691	CALL ctl_opn( kumond, TRIM(ldname), 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, 6, .FALSE. , 1 )
3692	END FUNCTION mynode
3693
3694	SUBROUTINE mppsync ! Dummy routine
3695	END SUBROUTINE mppsync
3696
3697	SUBROUTINE mpp_sum_as( parr, kdim, kcom ) ! Dummy routine
3698	REAL , DIMENSION(:) :: parr
3699	INTEGER :: kdim
3700	INTEGER, OPTIONAL :: kcom
3701	WRITE(,) 'mpp_sum_as: You should not have seen this print! error?', kdim, parr(1), kcom
3702	END SUBROUTINE mpp_sum_as
3703
3704	SUBROUTINE mpp_sum_a2s( parr, kdim, kcom ) ! Dummy routine
3705	REAL , DIMENSION(:,:) :: parr
3706	INTEGER :: kdim
3707	INTEGER, OPTIONAL :: kcom
3708	WRITE(,) 'mpp_sum_a2s: You should not have seen this print! error?', kdim, parr(1,1), kcom
3709	END SUBROUTINE mpp_sum_a2s
3710
3711	SUBROUTINE mpp_sum_ai( karr, kdim, kcom ) ! Dummy routine
3712	INTEGER, DIMENSION(:) :: karr
3713	INTEGER :: kdim
3714	INTEGER, OPTIONAL :: kcom
3715	WRITE(,) 'mpp_sum_ai: You should not have seen this print! error?', kdim, karr(1), kcom
3716	END SUBROUTINE mpp_sum_ai
3717
3718	SUBROUTINE mpp_sum_s( psca, kcom ) ! Dummy routine
3719	REAL :: psca
3720	INTEGER, OPTIONAL :: kcom
3721	WRITE(,) 'mpp_sum_s: You should not have seen this print! error?', psca, kcom
3722	END SUBROUTINE mpp_sum_s
3723
3724	SUBROUTINE mpp_sum_i( kint, kcom ) ! Dummy routine
3725	integer :: kint
3726	INTEGER, OPTIONAL :: kcom
3727	WRITE(,) 'mpp_sum_i: You should not have seen this print! error?', kint, kcom
3728	END SUBROUTINE mpp_sum_i
3729
3730	SUBROUTINE mppsum_realdd( ytab, kcom )
3731	COMPLEX(wp), INTENT(inout) :: ytab ! input scalar
3732	INTEGER , INTENT( in ), OPTIONAL :: kcom
3733	WRITE(,) 'mppsum_realdd: You should not have seen this print! error?', ytab
3734	END SUBROUTINE mppsum_realdd
3735
3736	SUBROUTINE mppsum_a_realdd( ytab, kdim, kcom )
3737	INTEGER , INTENT( in ) :: kdim ! size of ytab
3738	COMPLEX(wp), DIMENSION(kdim), INTENT( inout ) :: ytab ! input array
3739	INTEGER , INTENT( in ), OPTIONAL :: kcom
3740	WRITE(,) 'mppsum_a_realdd: You should not have seen this print! error?', kdim, ytab(1), kcom
3741	END SUBROUTINE mppsum_a_realdd
3742
3743	SUBROUTINE mppmax_a_real( parr, kdim, kcom )
3744	REAL , DIMENSION(:) :: parr
3745	INTEGER :: kdim
3746	INTEGER, OPTIONAL :: kcom
3747	WRITE(,) 'mppmax_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3748	END SUBROUTINE mppmax_a_real
3749
3750	SUBROUTINE mppmax_real( psca, kcom )
3751	REAL :: psca
3752	INTEGER, OPTIONAL :: kcom
3753	WRITE(,) 'mppmax_real: You should not have seen this print! error?', psca, kcom
3754	END SUBROUTINE mppmax_real
3755
3756	SUBROUTINE mppmin_a_real( parr, kdim, kcom )
3757	REAL , DIMENSION(:) :: parr
3758	INTEGER :: kdim
3759	INTEGER, OPTIONAL :: kcom
3760	WRITE(,) 'mppmin_a_real: You should not have seen this print! error?', kdim, parr(1), kcom
3761	END SUBROUTINE mppmin_a_real
3762
3763	SUBROUTINE mppmin_real( psca, kcom )
3764	REAL :: psca
3765	INTEGER, OPTIONAL :: kcom
3766	WRITE(,) 'mppmin_real: You should not have seen this print! error?', psca, kcom
3767	END SUBROUTINE mppmin_real
3768
3769	SUBROUTINE mppmax_a_int( karr, kdim ,kcom)
3770	INTEGER, DIMENSION(:) :: karr
3771	INTEGER :: kdim
3772	INTEGER, OPTIONAL :: kcom
3773	WRITE(,) 'mppmax_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3774	END SUBROUTINE mppmax_a_int
3775
3776	SUBROUTINE mppmax_int( kint, kcom)
3777	INTEGER :: kint
3778	INTEGER, OPTIONAL :: kcom
3779	WRITE(,) 'mppmax_int: You should not have seen this print! error?', kint, kcom
3780	END SUBROUTINE mppmax_int
3781
3782	SUBROUTINE mppmin_a_int( karr, kdim, kcom )
3783	INTEGER, DIMENSION(:) :: karr
3784	INTEGER :: kdim
3785	INTEGER, OPTIONAL :: kcom
3786	WRITE(,) 'mppmin_a_int: You should not have seen this print! error?', kdim, karr(1), kcom
3787	END SUBROUTINE mppmin_a_int
3788
3789	SUBROUTINE mppmin_int( kint, kcom )
3790	INTEGER :: kint
3791	INTEGER, OPTIONAL :: kcom
3792	WRITE(,) 'mppmin_int: You should not have seen this print! error?', kint, kcom
3793	END SUBROUTINE mppmin_int
3794
3795	SUBROUTINE mpp_minloc2d( ptab, pmask, pmin, ki, kj )
3796	REAL :: pmin
3797	REAL , DIMENSION (:,:) :: ptab, pmask
3798	INTEGER :: ki, kj
3799	WRITE(,) 'mpp_minloc2d: You should not have seen this print! error?', pmin, ki, kj, ptab(1,1), pmask(1,1)
3800	END SUBROUTINE mpp_minloc2d
3801
3802	SUBROUTINE mpp_minloc3d( ptab, pmask, pmin, ki, kj, kk )
3803	REAL :: pmin
3804	REAL , DIMENSION (:,:,:) :: ptab, pmask
3805	INTEGER :: ki, kj, kk
3806	WRITE(,) 'mpp_minloc3d: You should not have seen this print! error?', pmin, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3807	END SUBROUTINE mpp_minloc3d
3808
3809	SUBROUTINE mpp_maxloc2d( ptab, pmask, pmax, ki, kj )
3810	REAL :: pmax
3811	REAL , DIMENSION (:,:) :: ptab, pmask
3812	INTEGER :: ki, kj
3813	WRITE(,) 'mpp_maxloc2d: You should not have seen this print! error?', pmax, ki, kj, ptab(1,1), pmask(1,1)
3814	END SUBROUTINE mpp_maxloc2d
3815
3816	SUBROUTINE mpp_maxloc3d( ptab, pmask, pmax, ki, kj, kk )
3817	REAL :: pmax
3818	REAL , DIMENSION (:,:,:) :: ptab, pmask
3819	INTEGER :: ki, kj, kk
3820	WRITE(,) 'mpp_maxloc3d: You should not have seen this print! error?', pmax, ki, kj, kk, ptab(1,1,1), pmask(1,1,1)
3821	END SUBROUTINE mpp_maxloc3d
3822
3823	SUBROUTINE mppstop
3824	STOP ! non MPP case, just stop the run
3825	END SUBROUTINE mppstop
3826
3827	SUBROUTINE mpp_ini_ice( kcom, knum )
3828	INTEGER :: kcom, knum
3829	WRITE(,) 'mpp_ini_ice: You should not have seen this print! error?', kcom, knum
3830	END SUBROUTINE mpp_ini_ice
3831
3832	SUBROUTINE mpp_ini_znl( knum )
3833	INTEGER :: knum
3834	WRITE(,) 'mpp_ini_znl: You should not have seen this print! error?', knum
3835	END SUBROUTINE mpp_ini_znl
3836
3837	SUBROUTINE mpp_comm_free( kcom )
3838	INTEGER :: kcom
3839	WRITE(,) 'mpp_comm_free: You should not have seen this print! error?', kcom
3840	END SUBROUTINE mpp_comm_free
3841	#endif
3842
3843	!!----------------------------------------------------------------------
3844	!! All cases: ctl_stop, ctl_warn, get_unit, ctl_opn, ctl_nam routines
3845	!!----------------------------------------------------------------------
3846
3847	SUBROUTINE ctl_stop( cd1, cd2, cd3, cd4, cd5 , &
3848	& cd6, cd7, cd8, cd9, cd10 )
3849	!!----------------------------------------------------------------------
3850	!! * ROUTINE stop_opa *
3851	!!
3852	!! ** Purpose : print in ocean.outpput file a error message and
3853	!! increment the error number (nstop) by one.
3854	!!----------------------------------------------------------------------
3855	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3856	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3857	!!----------------------------------------------------------------------
3858	!
3859	nstop = nstop + 1
3860	IF(lwp) THEN
3861	WRITE(numout,cform_err)
3862	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3863	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3864	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3865	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3866	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3867	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3868	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3869	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3870	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3871	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3872	ENDIF
3873	CALL FLUSH(numout )
3874	IF( numstp /= -1 ) CALL FLUSH(numstp )
3875	IF( numsol /= -1 ) CALL FLUSH(numsol )
3876	IF( numevo_ice /= -1 ) CALL FLUSH(numevo_ice)
3877	!
3878	IF( cd1 == 'STOP' ) THEN
3879	IF(lwp) WRITE(numout,*) 'huge E-R-R-O-R : immediate stop'
3880	CALL mppstop()
3881	ENDIF
3882	!
3883	END SUBROUTINE ctl_stop
3884
3885
3886	SUBROUTINE ctl_warn( cd1, cd2, cd3, cd4, cd5, &
3887	& cd6, cd7, cd8, cd9, cd10 )
3888	!!----------------------------------------------------------------------
3889	!! * ROUTINE stop_warn *
3890	!!
3891	!! ** Purpose : print in ocean.outpput file a error message and
3892	!! increment the warning number (nwarn) by one.
3893	!!----------------------------------------------------------------------
3894	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd1, cd2, cd3, cd4, cd5
3895	CHARACTER(len=*), INTENT(in), OPTIONAL :: cd6, cd7, cd8, cd9, cd10
3896	!!----------------------------------------------------------------------
3897	!
3898	nwarn = nwarn + 1
3899	IF(lwp) THEN
3900	WRITE(numout,cform_war)
3901	IF( PRESENT(cd1 ) ) WRITE(numout,*) cd1
3902	IF( PRESENT(cd2 ) ) WRITE(numout,*) cd2
3903	IF( PRESENT(cd3 ) ) WRITE(numout,*) cd3
3904	IF( PRESENT(cd4 ) ) WRITE(numout,*) cd4
3905	IF( PRESENT(cd5 ) ) WRITE(numout,*) cd5
3906	IF( PRESENT(cd6 ) ) WRITE(numout,*) cd6
3907	IF( PRESENT(cd7 ) ) WRITE(numout,*) cd7
3908	IF( PRESENT(cd8 ) ) WRITE(numout,*) cd8
3909	IF( PRESENT(cd9 ) ) WRITE(numout,*) cd9
3910	IF( PRESENT(cd10) ) WRITE(numout,*) cd10
3911	ENDIF
3912	CALL FLUSH(numout)
3913	!
3914	END SUBROUTINE ctl_warn
3915
3916
3917	SUBROUTINE ctl_opn( knum, cdfile, cdstat, cdform, cdacce, klengh, kout, ldwp, karea )
3918	!!----------------------------------------------------------------------
3919	!! * ROUTINE ctl_opn *
3920	!!
3921	!! ** Purpose : Open file and check if required file is available.
3922	!!
3923	!! ** Method : Fortan open
3924	!!----------------------------------------------------------------------
3925	INTEGER , INTENT( out) :: knum ! logical unit to open
3926	CHARACTER(len=*) , INTENT(in ) :: cdfile ! file name to open
3927	CHARACTER(len=*) , INTENT(in ) :: cdstat ! disposition specifier
3928	CHARACTER(len=*) , INTENT(in ) :: cdform ! formatting specifier
3929	CHARACTER(len=*) , INTENT(in ) :: cdacce ! access specifier
3930	INTEGER , INTENT(in ) :: klengh ! record length
3931	INTEGER , INTENT(in ) :: kout ! number of logical units for write
3932	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
3933	INTEGER, OPTIONAL, INTENT(in ) :: karea ! proc number
3934	!!
3935	CHARACTER(len=80) :: clfile
3936	INTEGER :: iost
3937	!!----------------------------------------------------------------------
3938
3939	! adapt filename
3940	! ----------------
3941	clfile = TRIM(cdfile)
3942	IF( PRESENT( karea ) ) THEN
3943	IF( karea > 1 ) WRITE(clfile, "(a,'_',i4.4)") TRIM(clfile), karea-1
3944	ENDIF
3945	#if defined key_agrif
3946	IF( .NOT. Agrif_Root() ) clfile = TRIM(Agrif_CFixed())//'_'//TRIM(clfile)
3947	knum=Agrif_Get_Unit()
3948	#else
3949	knum=get_unit()
3950	#endif
3951
3952	iost=0
3953	IF( cdacce(1:6) == 'DIRECT' ) THEN
3954	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat, RECL=klengh, ERR=100, IOSTAT=iost )
3955	ELSE
3956	OPEN( UNIT=knum, FILE=clfile, FORM=cdform, ACCESS=cdacce, STATUS=cdstat , ERR=100, IOSTAT=iost )
3957	ENDIF
3958	IF( iost == 0 ) THEN
3959	IF(ldwp) THEN
3960	WRITE(kout,*) ' file : ', clfile,' open ok'
3961	WRITE(kout,*) ' unit = ', knum
3962	WRITE(kout,*) ' status = ', cdstat
3963	WRITE(kout,*) ' form = ', cdform
3964	WRITE(kout,*) ' access = ', cdacce
3965	WRITE(kout,*)
3966	ENDIF
3967	ENDIF
3968	100 CONTINUE
3969	IF( iost /= 0 ) THEN
3970	IF(ldwp) THEN
3971	WRITE(kout,*)
3972	WRITE(kout,*) ' ===>>>> : bad opening file: ', clfile
3973	WRITE(kout,*) ' ======= === '
3974	WRITE(kout,*) ' unit = ', knum
3975	WRITE(kout,*) ' status = ', cdstat
3976	WRITE(kout,*) ' form = ', cdform
3977	WRITE(kout,*) ' access = ', cdacce
3978	WRITE(kout,*) ' iostat = ', iost
3979	WRITE(kout,*) ' we stop. verify the file '
3980	WRITE(kout,*)
3981	ENDIF
3982	STOP 'ctl_opn bad opening'
3983	ENDIF
3984
3985	END SUBROUTINE ctl_opn
3986
3987	SUBROUTINE ctl_nam ( kios, cdnam, ldwp )
3988	!!----------------------------------------------------------------------
3989	!! * ROUTINE ctl_nam *
3990	!!
3991	!! ** Purpose : Informations when error while reading a namelist
3992	!!
3993	!! ** Method : Fortan open
3994	!!----------------------------------------------------------------------
3995	INTEGER , INTENT(inout) :: kios ! IO status after reading the namelist
3996	CHARACTER(len=*) , INTENT(in ) :: cdnam ! group name of namelist for which error occurs
3997	CHARACTER(len=5) :: clios ! string to convert iostat in character for print
3998	LOGICAL , INTENT(in ) :: ldwp ! boolean term for print
3999	!!----------------------------------------------------------------------
4000
4001	!
4002	! ----------------
4003	WRITE (clios, '(I5.0)') kios
4004	IF( kios < 0 ) THEN
4005	CALL ctl_warn( 'W A R N I N G: end of record or file while reading namelist ' &
4006	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
4007	ENDIF
4008
4009	IF( kios > 0 ) THEN
4010	CALL ctl_stop( 'E R R O R : misspelled variable in namelist ' &
4011	& // TRIM(cdnam) // ' iostat = ' // TRIM(clios) )
4012	ENDIF
4013	kios = 0
4014	RETURN
4015
4016	END SUBROUTINE ctl_nam
4017
4018	INTEGER FUNCTION get_unit()
4019	!!----------------------------------------------------------------------
4020	!! * FUNCTION get_unit *
4021	!!
4022	!! ** Purpose : return the index of an unused logical unit
4023	!!----------------------------------------------------------------------
4024	LOGICAL :: llopn
4025	!!----------------------------------------------------------------------
4026	!
4027	get_unit = 15 ! choose a unit that is big enough then it is not already used in NEMO
4028	llopn = .TRUE.
4029	DO WHILE( (get_unit < 998) .AND. llopn )
4030	get_unit = get_unit + 1
4031	INQUIRE( unit = get_unit, opened = llopn )
4032	END DO
4033	IF( (get_unit == 999) .AND. llopn ) THEN
4034	CALL ctl_stop( 'get_unit: All logical units until 999 are used...' )
4035	get_unit = -1
4036	ENDIF
4037	!
4038	END FUNCTION get_unit
4039
4040	!!----------------------------------------------------------------------
4041	END MODULE lib_mpp

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