-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathice_gather_scatter.F90
1527 lines (1239 loc) · 49 KB
/
ice_gather_scatter.F90
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
! SVN:$Id$
!|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
module ice_gather_scatter
! This module contains routines that mimic the behavior of the mpi
! version in the case of a single processor: gathering data to a single
! processor from a distributed array, and scattering data from a
! single processor to a distributed array.
!
! author: Phil Jones, LANL
! Oct. 2004: Adapted from POP version by William H. Lipscomb, LANL
! Jan. 2008: Elizabeth Hunke replaced old routines with new POP
! infrastructure, added specialized routine scatter_global_stress
use ice_kinds_mod
use ice_constants
use ice_blocks, only: block, get_block, nghost, nx_block, ny_block, &
nblocks_x, nblocks_y, nblocks_tot
use ice_distribution, only: distrb
use ice_domain_size, only: nx_global, ny_global
use ice_exit, only: abort_ice
implicit none
private
save
public :: gather_global, &
gather_global_ext, &
scatter_global, &
scatter_global_ext, &
scatter_global_stress
!-----------------------------------------------------------------------
!
! overload module functions
!
!-----------------------------------------------------------------------
interface gather_global
module procedure gather_global_dbl, &
gather_global_real, &
gather_global_int
end interface
interface scatter_global
module procedure scatter_global_dbl, &
scatter_global_real, &
scatter_global_int
end interface
!-----------------------------------------------------------------------
!
! module variables
!
!-----------------------------------------------------------------------
!***********************************************************************
contains
!***********************************************************************
subroutine gather_global_dbl(ARRAY_G, ARRAY, dst_task, src_dist, spc_val)
! This subroutine gathers a distributed array to a global-sized
! array on the processor dst_task.
!
! This is the specific inteface for double precision arrays
! corresponding to the generic interface gather_global. It is shown
! to provide information on the generic interface (the generic
! interface is identical, but chooses a specific inteface based
! on the data type of the input argument).
integer (int_kind), intent(in) :: &
dst_task ! task to which array should be gathered
type (distrb), intent(in) :: &
src_dist ! distribution of blocks in the source array
real (dbl_kind), dimension(:,:,:), intent(in) :: &
ARRAY ! array containing horizontal slab of distributed field
real (dbl_kind), intent(in), optional :: &
spc_val
real (dbl_kind), dimension(:,:), intent(inout) :: &
ARRAY_G ! array containing global horizontal field on dst_task
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n ! dummy loop counters
real (dbl_kind) :: &
special_value
type (block) :: &
this_block ! block info for current block
if (present(spc_val)) then
special_value = spc_val
else
special_value = spval_dbl
endif
!-----------------------------------------------------------------------
!
! copy local array into block decomposition
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
this_block = get_block(n,n)
!*** copy local blocks
if (src_dist%blockLocation(n) /= 0) then
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = &
ARRAY(i,j,src_dist%blockLocalID(n))
end do
end do
else !*** fill land blocks with special values
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = special_value
end do
end do
endif
end do
!-----------------------------------------------------------------------
end subroutine gather_global_dbl
!***********************************************************************
subroutine gather_global_real(ARRAY_G, ARRAY, dst_task, src_dist)
!-----------------------------------------------------------------------
!
! This subroutine gathers a distributed array to a global-sized
! array on the processor dst_task.
!
!-----------------------------------------------------------------------
!-----------------------------------------------------------------------
!
! input variables
!
!-----------------------------------------------------------------------
integer (int_kind), intent(in) :: &
dst_task ! task to which array should be gathered
type (distrb), intent(in) :: &
src_dist ! distribution of blocks in the source array
real (real_kind), dimension(:,:,:), intent(in) :: &
ARRAY ! array containing distributed field
!-----------------------------------------------------------------------
!
! output variables
!
!-----------------------------------------------------------------------
real (real_kind), dimension(:,:), intent(inout) :: &
ARRAY_G ! array containing global field on dst_task
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n ! dummy loop counters
type (block) :: &
this_block ! block info for current block
!-----------------------------------------------------------------------
!
! copy local array into block decomposition
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
this_block = get_block(n,n)
!*** copy local blocks
if (src_dist%blockLocation(n) /= 0) then
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = &
ARRAY(i,j,src_dist%blockLocalID(n))
end do
end do
else !*** fill land blocks with zeroes
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = 0._real_kind
end do
end do
endif
end do
!-----------------------------------------------------------------------
end subroutine gather_global_real
!***********************************************************************
subroutine gather_global_int(ARRAY_G, ARRAY, dst_task, src_dist)
!-----------------------------------------------------------------------
!
! This subroutine gathers a distributed array to a global-sized
! array on the processor dst_task.
!
!-----------------------------------------------------------------------
!-----------------------------------------------------------------------
!
! input variables
!
!-----------------------------------------------------------------------
integer (int_kind), intent(in) :: &
dst_task ! task to which array should be gathered
type (distrb), intent(in) :: &
src_dist ! distribution of blocks in the source array
integer (int_kind), dimension(:,:,:), intent(in) :: &
ARRAY ! array containing distributed field
!-----------------------------------------------------------------------
!
! output variables
!
!-----------------------------------------------------------------------
integer (int_kind), dimension(:,:), intent(inout) :: &
ARRAY_G ! array containing global field on dst_task
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n ! dummy loop counters
type (block) :: &
this_block ! block info for current block
!-----------------------------------------------------------------------
!
! copy local array into block decomposition
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
this_block = get_block(n,n)
!*** copy local blocks
if (src_dist%blockLocation(n) /= 0) then
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = &
ARRAY(i,j,src_dist%blockLocalID(n))
end do
end do
else !*** fill land blocks with zeroes
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i), &
this_block%j_glob(j)) = 0
end do
end do
endif
end do
!-----------------------------------------------------------------------
end subroutine gather_global_int
!***********************************************************************
subroutine gather_global_ext(ARRAY_G, ARRAY, dst_task, src_dist, spc_val)
! This subroutine gathers a distributed array to a global-sized
! array on the processor dst_task, including ghost cells.
integer (int_kind), intent(in) :: &
dst_task ! task to which array should be gathered
type (distrb), intent(in) :: &
src_dist ! distribution of blocks in the source array
real (dbl_kind), dimension(:,:,:), intent(in) :: &
ARRAY ! array containing horizontal slab of distributed field
real (dbl_kind), optional :: &
spc_val
real (dbl_kind), dimension(:,:), intent(inout) :: &
ARRAY_G ! array containing global horizontal field on dst_task
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n ,&! dummy loop counters
nx, ny ! global dimensions
real (dbl_kind) :: &
special_value
type (block) :: &
this_block ! block info for current block
if (present(spc_val)) then
special_value = spc_val
else
special_value = spval_dbl
endif
nx = nx_global + 2*nghost
ny = ny_global + 2*nghost
!-----------------------------------------------------------------------
!
! copy local array into block decomposition
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
this_block = get_block(n,n)
!*** copy local blocks
if (src_dist%blockLocation(n) /= 0) then
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i)+nghost, &
this_block%j_glob(j)+nghost) = &
ARRAY(i,j,src_dist%blockLocalID(n))
end do
end do
! fill ghost cells
if (this_block%jblock == 1) then
! south block
do j=1, nghost
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i)+nghost,j) = &
ARRAY (i,j,src_dist%blockLocalID(n))
end do
end do
if (this_block%iblock == 1) then
! southwest corner
do j=1, nghost
do i=1, nghost
ARRAY_G(i,j) = &
ARRAY (i,j,src_dist%blockLocalID(n))
end do
end do
endif
endif
if (this_block%jblock == nblocks_y) then
! north block
do j=1, nghost
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i)+nghost, &
ny_global + nghost + j) = &
ARRAY (i,this_block%jhi+nghost-j+1,src_dist%blockLocalID(n))
end do
end do
if (this_block%iblock == nblocks_x) then
! northeast corner
do j=1, nghost
do i=1, nghost
ARRAY_G(nx-i+1, ny-j+1) = &
ARRAY (this_block%ihi+nghost-i+1, &
this_block%jhi+nghost-j+1, &
src_dist%blockLocalID(n))
end do
end do
endif
endif
if (this_block%iblock == 1) then
! west block
do j=this_block%jlo,this_block%jhi
do i=1, nghost
ARRAY_G(i,this_block%j_glob(j)+nghost) = &
ARRAY (i,j,src_dist%blockLocalID(n))
end do
end do
if (this_block%jblock == nblocks_y) then
! northwest corner
do j=1, nghost
do i=1, nghost
ARRAY_G(i, ny-j+1) = &
ARRAY (i,this_block%jhi+nghost-j+1,src_dist%blockLocalID(n))
end do
end do
endif
endif
if (this_block%iblock == nblocks_x) then
! east block
do j=this_block%jlo,this_block%jhi
do i=1, nghost
ARRAY_G(nx_global + nghost + i, &
this_block%j_glob(j)+nghost) = &
ARRAY (this_block%ihi+nghost-i+1,j,src_dist%blockLocalID(n))
end do
end do
if (this_block%jblock == 1) then
! southeast corner
do j=1, nghost
do i=1, nghost
ARRAY_G( nx-i+1,j) = &
ARRAY (this_block%ihi+nghost-i+1,j,src_dist%blockLocalID(n))
end do
end do
endif
endif
else !*** fill land blocks with special values
do j=this_block%jlo,this_block%jhi
do i=this_block%ilo,this_block%ihi
ARRAY_G(this_block%i_glob(i)+nghost, &
this_block%j_glob(j)+nghost) = special_value
end do
end do
endif
end do
!-----------------------------------------------------------------------
end subroutine gather_global_ext
!***********************************************************************
subroutine scatter_global_dbl(ARRAY, ARRAY_G, src_task, dst_dist, &
field_loc, field_type)
! This subroutine scatters a global-sized array on the processor
! src\_task to a distribution of blocks given by dst\_dist.
!
! This is the specific interface for double precision arrays
! corresponding to the generic interface scatter_global. It is shown
! to provide information on the generic interface (the generic
! interface is identical, but chooses a specific interface based
! on the data type of the input argument).
integer (int_kind), intent(in) :: &
src_task ! task from which array should be scattered
type (distrb), intent(in) :: &
dst_dist ! distribution of resulting blocks
real (dbl_kind), dimension(:,:), intent(in) :: &
ARRAY_G ! array containing global field on src_task
integer (int_kind), intent(in) :: &
field_type, &! id for type of field (scalar, vector, angle)
field_loc ! id for location on horizontal grid
! (center, NEcorner, Nface, Eface)
real (dbl_kind), dimension(:,:,:), intent(inout) :: &
ARRAY ! array containing distributed field
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n, &! dummy loop indices
isrc, jsrc, &! source addresses
xoffset, yoffset, &! offsets for tripole boundary conditions
yoffset2, &!
isign, &! sign factor for tripole boundary conditions
dst_block ! local block index in dest distribution
type (block) :: &
this_block ! block info for current block
!-----------------------------------------------------------------------
!
! initialize return array to zero and set up tripole quantities
!
!-----------------------------------------------------------------------
ARRAY = c0
this_block = get_block(1,1) ! for the tripoleTflag - all blocks have it
if (this_block%tripoleTFlag) then
select case (field_loc)
case (field_loc_center) ! cell center location
xoffset = 2
yoffset = 0
case (field_loc_NEcorner) ! cell corner (velocity) location
xoffset = 1
yoffset = -1
case (field_loc_Eface) ! cell face location
xoffset = 1
yoffset = 0
case (field_loc_Nface) ! cell face location
xoffset = 2
yoffset = -1
case (field_loc_noupdate) ! ghost cells never used - use cell center
xoffset = 1
yoffset = 1
end select
else
select case (field_loc)
case (field_loc_center) ! cell center location
xoffset = 1
yoffset = 1
case (field_loc_NEcorner) ! cell corner (velocity) location
xoffset = 0
yoffset = 0
case (field_loc_Eface) ! cell face location
xoffset = 0
yoffset = 1
case (field_loc_Nface) ! cell face location
xoffset = 1
yoffset = 0
case (field_loc_noupdate) ! ghost cells never used - use cell center
xoffset = 1
yoffset = 1
end select
endif
select case (field_type)
case (field_type_scalar)
isign = 1
case (field_type_vector)
isign = -1
case (field_type_angle)
isign = -1
case (field_type_noupdate) ! ghost cells not needed - use cell center
isign = 1
case default
call abort_ice('Unknown field type in scatter')
end select
!-----------------------------------------------------------------------
!
! copy blocks of global array into local block distribution
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
if (dst_dist%blockLocation(n) /= 0) then
this_block = get_block(n,n)
dst_block = dst_dist%blockLocalID(n)
!*** if this is an interior block, then there is no
!*** padding or update checking required
if (this_block%iblock > 1 .and. &
this_block%iblock < nblocks_x .and. &
this_block%jblock > 1 .and. &
this_block%jblock < nblocks_y) then
do j=1,ny_block
do i=1,nx_block
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
end do
end do
!*** if this is an edge block but not a northern edge
!*** we only need to check for closed boundaries and
!*** padding (global index = 0)
else if (this_block%jblock /= nblocks_y) then
do j=1,ny_block
if (this_block%j_glob(j) /= 0) then
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
endif
end do
endif
end do
!*** if this is a northern edge block, we need to check
!*** for and properly deal with tripole boundaries
else
do j=1,ny_block
if (this_block%j_glob(j) > 0) then ! normal boundary
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
endif
end do
else if (this_block%j_glob(j) < 0) then ! tripole
! for yoffset=0 or 1, yoffset2=0,0
! for yoffset=-1, yoffset2=0,1, for u-rows on T-fold grid
do yoffset2=0,max(yoffset,0)-yoffset
jsrc = ny_global + yoffset + yoffset2 + &
(this_block%j_glob(j) + ny_global)
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
isrc = nx_global + xoffset - this_block%i_glob(i)
if (isrc < 1) isrc = isrc + nx_global
if (isrc > nx_global) isrc = isrc - nx_global
ARRAY(i,j-yoffset2,dst_block) &
= isign * ARRAY_G(isrc,jsrc)
endif
end do
end do
endif
end do
endif
endif ! dst block not land
end do ! block loop
!-----------------------------------------------------------------
! Ensure unused ghost cell values are 0
!-----------------------------------------------------------------
if (field_loc == field_loc_noupdate) then
do n=1,nblocks_tot
dst_block = dst_dist%blockLocalID(n)
this_block = get_block(n,n)
if (dst_block > 0) then
! north edge
do j = this_block%jhi+1,ny_block
do i = 1, nx_block
ARRAY (i,j,dst_block) = c0
enddo
enddo
! east edge
do j = 1, ny_block
do i = this_block%ihi+1,nx_block
ARRAY (i,j,dst_block) = c0
enddo
enddo
! south edge
do j = 1, this_block%jlo-1
do i = 1, nx_block
ARRAY (i,j,dst_block) = c0
enddo
enddo
! west edge
do j = 1, ny_block
do i = 1, this_block%ilo-1
ARRAY (i,j,dst_block) = c0
enddo
enddo
endif
enddo
endif
!-----------------------------------------------------------------------
end subroutine scatter_global_dbl
!***********************************************************************
subroutine scatter_global_real(ARRAY, ARRAY_G, src_task, dst_dist, &
field_loc, field_type)
!-----------------------------------------------------------------------
!
! This subroutine scatters a global-sized array on the processor
! src\_task to a distribution of blocks given by dst\_dist.
!
!-----------------------------------------------------------------------
!-----------------------------------------------------------------------
!
! input variables
!
!-----------------------------------------------------------------------
integer (int_kind), intent(in) :: &
src_task ! task from which array should be scattered
type (distrb), intent(in) :: &
dst_dist ! distribution of resulting blocks
real (real_kind), dimension(:,:), intent(in) :: &
ARRAY_G ! array containing global field on src_task
integer (int_kind), intent(in) :: &
field_type, &! id for type of field (scalar, vector, angle)
field_loc ! id for location on horizontal grid
! (center, NEcorner, Nface, Eface)
!-----------------------------------------------------------------------
!
! output variables
!
!-----------------------------------------------------------------------
real (real_kind), dimension(:,:,:), intent(inout) :: &
ARRAY ! array containing distributed field
!-----------------------------------------------------------------------
!
! local variables
!
!-----------------------------------------------------------------------
integer (int_kind) :: &
i,j,n, &! dummy loop indices
isrc, jsrc, &! source addresses
xoffset, yoffset, &! offsets for tripole boundary conditions
yoffset2, &!
isign, &! sign factor for tripole boundary conditions
dst_block ! local block index in dest distribution
type (block) :: &
this_block ! block info for current block
!-----------------------------------------------------------------------
!
! initialize return array to zero and set up tripole quantities
!
!-----------------------------------------------------------------------
ARRAY = 0._real_kind
this_block = get_block(1,1) ! for the tripoleTflag - all blocks have it
if (this_block%tripoleTFlag) then
select case (field_loc)
case (field_loc_center) ! cell center location
xoffset = 2
yoffset = 0
case (field_loc_NEcorner) ! cell corner (velocity) location
xoffset = 1
yoffset = 1
case (field_loc_Eface) ! cell face location
xoffset = 1
yoffset = 0
case (field_loc_Nface) ! cell face location
xoffset = 2
yoffset = 1
case (field_loc_noupdate) ! ghost cells never used - use cell center
xoffset = 1
yoffset = 1
end select
else
select case (field_loc)
case (field_loc_center) ! cell center location
xoffset = 1
yoffset = 1
case (field_loc_NEcorner) ! cell corner (velocity) location
xoffset = 0
yoffset = 0
case (field_loc_Eface) ! cell face location
xoffset = 0
yoffset = 1
case (field_loc_Nface) ! cell face location
xoffset = 1
yoffset = 0
case (field_loc_noupdate) ! ghost cells never used - use cell center
xoffset = 1
yoffset = 1
end select
endif
select case (field_type)
case (field_type_scalar)
isign = 1
case (field_type_vector)
isign = -1
case (field_type_angle)
isign = -1
case (field_type_noupdate) ! ghost cells not needed - use cell center
isign = 1
case default
call abort_ice('Unknown field type in scatter')
end select
!-----------------------------------------------------------------------
!
! copy blocks of global array into local block distribution
!
!-----------------------------------------------------------------------
do n=1,nblocks_tot
if (dst_dist%blockLocation(n) /= 0) then
this_block = get_block(n,n)
dst_block = dst_dist%blockLocalID(n)
!*** if this is an interior block, then there is no
!*** padding or update checking required
if (this_block%iblock > 1 .and. &
this_block%iblock < nblocks_x .and. &
this_block%jblock > 1 .and. &
this_block%jblock < nblocks_y) then
do j=1,ny_block
do i=1,nx_block
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
end do
end do
!*** if this is an edge block but not a northern edge
!*** we only need to check for closed boundaries and
!*** padding (global index = 0)
else if (this_block%jblock /= nblocks_y) then
do j=1,ny_block
if (this_block%j_glob(j) /= 0) then
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
endif
end do
endif
end do
!*** if this is a northern edge block, we need to check
!*** for and properly deal with tripole boundaries
else
do j=1,ny_block
if (this_block%j_glob(j) > 0) then ! normal boundary
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
ARRAY(i,j,dst_block) = ARRAY_G(this_block%i_glob(i),&
this_block%j_glob(j))
endif
end do
else if (this_block%j_glob(j) < 0) then ! tripole
! for yoffset=0 or 1, yoffset2=0,0
! for yoffset=-1, yoffset2=0,1, for u-rows on T-fold grid
do yoffset2=0,max(yoffset,0)-yoffset
jsrc = ny_global + yoffset + yoffset2 + &
(this_block%j_glob(j) + ny_global)
do i=1,nx_block
if (this_block%i_glob(i) /= 0) then
isrc = nx_global + xoffset - this_block%i_glob(i)
if (isrc < 1) isrc = isrc + nx_global
if (isrc > nx_global) isrc = isrc - nx_global
ARRAY(i,j-yoffset2,dst_block) &
= isign * ARRAY_G(isrc,jsrc)
endif
end do
end do
endif
end do
endif
endif ! dst block not land
end do ! block loop
!-----------------------------------------------------------------
! Ensure unused ghost cell values are 0
!-----------------------------------------------------------------
if (field_loc == field_loc_noupdate) then
do n=1,nblocks_tot
dst_block = dst_dist%blockLocalID(n)
this_block = get_block(n,n)
if (dst_block > 0) then
! north edge
do j = this_block%jhi+1,ny_block
do i = 1, nx_block
ARRAY (i,j,dst_block) = 0._real_kind
enddo
enddo
! east edge
do j = 1, ny_block
do i = this_block%ihi+1,nx_block
ARRAY (i,j,dst_block) = 0._real_kind
enddo
enddo
! south edge
do j = 1, this_block%jlo-1
do i = 1, nx_block
ARRAY (i,j,dst_block) = 0._real_kind
enddo
enddo
! west edge
do j = 1, ny_block
do i = 1, this_block%ilo-1
ARRAY (i,j,dst_block) = 0._real_kind
enddo
enddo
endif
enddo
endif
!-----------------------------------------------------------------------
end subroutine scatter_global_real
!***********************************************************************
subroutine scatter_global_int(ARRAY, ARRAY_G, src_task, dst_dist, &
field_loc, field_type)
!-----------------------------------------------------------------------
!
! This subroutine scatters a global-sized array on the processor
! src\_task to a distribution of blocks given by dst\_dist.
!
!-----------------------------------------------------------------------
!-----------------------------------------------------------------------
!
! input variables
!
!-----------------------------------------------------------------------
integer (int_kind), intent(in) :: &
src_task ! task from which array should be scattered
type (distrb), intent(in) :: &
dst_dist ! distribution of resulting blocks
integer (int_kind), dimension(:,:), intent(in) :: &
ARRAY_G ! array containing global field on src_task
integer (int_kind), intent(in) :: &
field_type, &! id for type of field (scalar, vector, angle)
field_loc ! id for location on horizontal grid
! (center, NEcorner, Nface, Eface)
!-----------------------------------------------------------------------
!
! output variables