1 |
C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_uv_dgrid_3d_rx.template,v 1.3 2009/06/28 00:57:51 jmc Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "CPP_EEOPTIONS.h" |
5 |
#include "W2_OPTIONS.h" |
6 |
|
7 |
CBOP |
8 |
C !ROUTINE: EXCH2_UV_DGRID_3D_RX |
9 |
|
10 |
C !INTERFACE: |
11 |
SUBROUTINE EXCH2_UV_DGRID_3D_RX( |
12 |
U uPhi, vPhi, |
13 |
I withSigns, myNz, myThid ) |
14 |
|
15 |
C !DESCRIPTION: |
16 |
C*=====================================================================* |
17 |
C Purpose: SUBROUTINE EXCH2_UV_DGRID_3D_RX |
18 |
C handle exchanges for a 3D vector field on an D-grid. |
19 |
C |
20 |
C Input: |
21 |
C uPhi(lon,lat,levs,bi,bj) :: first component of vector |
22 |
C vPhi(lon,lat,levs,bi,bj) :: second component of vector |
23 |
C withSigns (logical) :: true to use sign of components |
24 |
C myNz :: 3rd dimension of input arrays uPhi,vPhi |
25 |
C myThid :: my Thread Id number |
26 |
C |
27 |
C Output: uPhi and vPhi are updated (halo regions filled) |
28 |
C |
29 |
C Calls: EXCH_RX (EXCH2_RX2_CUBE) ignoring sign |
30 |
C then put back the right signs |
31 |
C |
32 |
C*=====================================================================* |
33 |
|
34 |
C !USES: |
35 |
IMPLICIT NONE |
36 |
|
37 |
#include "SIZE.h" |
38 |
#include "EEPARAMS.h" |
39 |
#include "W2_EXCH2_SIZE.h" |
40 |
#include "W2_EXCH2_TOPOLOGY.h" |
41 |
|
42 |
C !INPUT/OUTPUT PARAMETERS: |
43 |
C == Argument list variables == |
44 |
INTEGER myNz |
45 |
_RX uPhi(1-OLx:sNx+OLx,1-OLy:sNy+OLy,myNz,nSx,nSy) |
46 |
_RX vPhi(1-OLx:sNx+OLx,1-OLy:sNy+OLy,myNz,nSx,nSy) |
47 |
LOGICAL withSigns |
48 |
INTEGER myThid |
49 |
|
50 |
C !LOCAL VARIABLES: |
51 |
C == Local variables == |
52 |
C i,j,k,bi,bj :: loop indices. |
53 |
C OL[wens] :: Overlap extents in west, east, north, south. |
54 |
C exchWidth[XY] :: Extent of regions that will be exchanged. |
55 |
|
56 |
INTEGER i,j,k,bi,bj |
57 |
INTEGER OLw, OLe, OLn, OLs, exchWidthX, exchWidthY |
58 |
_RX negOne |
59 |
INTEGER myTile, myFace |
60 |
CEOP |
61 |
|
62 |
OLw = OLx |
63 |
OLe = OLx |
64 |
OLn = OLy |
65 |
OLs = OLy |
66 |
exchWidthX = OLx |
67 |
exchWidthY = OLy |
68 |
negOne = 1. |
69 |
IF (withSigns) negOne = -1. |
70 |
|
71 |
C-- First call the exchanges for the two components, ignoring the Sign |
72 |
C note the order: vPhi,uPhi on D-grid are co-located with (u,v)_Cgrid |
73 |
|
74 |
c CALL EXCH2_RX2_CUBE( vPhi, uPhi, .FALSE., 'Cg', |
75 |
c I OLw, OLe, OLs, OLn, myNz, |
76 |
c I exchWidthX, exchWidthY, |
77 |
c I EXCH_UPDATE_CORNERS, myThid ) |
78 |
c CALL EXCH2_RX2_CUBE( vPhi, uPhi, .FALSE., 'Cg', |
79 |
c I OLw, OLe, OLs, OLn, myNz, |
80 |
c I exchWidthX, exchWidthY, |
81 |
c I EXCH_UPDATE_CORNERS, myThid ) |
82 |
|
83 |
C- note: can substitute the low-level S/R calls above with: |
84 |
#ifdef W2_USE_R1_ONLY |
85 |
CALL EXCH2_UV_CGRID_3D_RX( |
86 |
U vPhi, uPhi, |
87 |
I .FALSE., myNz, myThid ) |
88 |
#else |
89 |
CALL EXCH2_UV_3D_RX( |
90 |
U vPhi, uPhi, |
91 |
I .FALSE., myNz, myThid ) |
92 |
#endif |
93 |
|
94 |
IF ( useCubedSphereExchange ) THEN |
95 |
C--- using CubedSphereExchange: |
96 |
|
97 |
C-- Then we may need to switch the signs depending on which cube face |
98 |
C we are located. |
99 |
|
100 |
C-- Loops on tile indices: |
101 |
DO bj = myByLo(myThid), myByHi(myThid) |
102 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
103 |
|
104 |
C- Choose what to do at each edge of the halo based on which face we are |
105 |
myTile = W2_myTileList(bi,bj) |
106 |
myFace = exch2_myFace(myTile) |
107 |
|
108 |
C-- Loops on level index: |
109 |
DO k = 1,myNz |
110 |
|
111 |
C- odd faces share disposition of all sections of the halo |
112 |
IF ( MOD(myFace,2).EQ.1 ) THEN |
113 |
C- North: |
114 |
IF (exch2_isNedge(myTile).EQ.1) THEN |
115 |
DO j = 1,exchWidthY |
116 |
DO i = 1-OLx,sNx+OLx |
117 |
uPhi(i,sNy+j,k,bi,bj) = uPhi(i,sNy+j,k,bi,bj)*negOne |
118 |
c vPhi(i,sNy+j,k,bi,bj) = vPhi(i,sNy+j,k,bi,bj) |
119 |
ENDDO |
120 |
ENDDO |
121 |
ENDIF |
122 |
C- South: (nothing to change) |
123 |
c IF (exch2_isSedge(myTile).EQ.1) THEN |
124 |
c DO j = 1,exchWidthY |
125 |
c DO i = 1-OLx,sNx+OLx |
126 |
c uPhi(i,1-j,k,bi,bj) = uPhi(i,1-j,k,bi,bj) |
127 |
c vPhi(i,1-j,k,bi,bj) = vPhi(i,1-j,k,bi,bj) |
128 |
c ENDDO |
129 |
c ENDDO |
130 |
c ENDIF |
131 |
C- East: (nothing to change) |
132 |
c IF (exch2_isEedge(myTile).EQ.1) THEN |
133 |
c DO j = 1-OLy,sNy+OLy |
134 |
c DO i = 1,exchWidthX |
135 |
c uPhi(sNx+i,j,k,bi,bj) = uPhi(sNx+i,j,k,bi,bj) |
136 |
c vPhi(sNx+i,j,k,bi,bj) = vPhi(sNx+i,j,k,bi,bj) |
137 |
c ENDDO |
138 |
c ENDDO |
139 |
c ENDIF |
140 |
C- West: |
141 |
IF (exch2_isWedge(myTile).EQ.1) THEN |
142 |
DO j = 1-OLy,sNy+OLy |
143 |
DO i = 1,exchWidthX |
144 |
c uPhi(1-i,j,k,bi,bj) = uPhi(1-i,j,k,bi,bj) |
145 |
vPhi(1-i,j,k,bi,bj) = vPhi(1-i,j,k,bi,bj)*negOne |
146 |
ENDDO |
147 |
ENDDO |
148 |
ENDIF |
149 |
|
150 |
ELSE |
151 |
C- Now the even faces (share disposition of all sections of the halo) |
152 |
|
153 |
C- East: |
154 |
IF (exch2_isEedge(myTile).EQ.1) THEN |
155 |
DO j = 1-OLy,sNy+OLy |
156 |
DO i = 1,exchWidthX |
157 |
c uPhi(sNx+i,j,k,bi,bj) = uPhi(sNx+i,j,k,bi,bj) |
158 |
vPhi(sNx+i,j,k,bi,bj) = vPhi(sNx+i,j,k,bi,bj)*negOne |
159 |
ENDDO |
160 |
ENDDO |
161 |
ENDIF |
162 |
C- West: (nothing to change) |
163 |
c IF (exch2_isWedge(myTile).EQ.1) THEN |
164 |
c DO j = 1-OLy,sNy+OLy |
165 |
c DO i = 1,exchWidthX |
166 |
c uPhi(1-i,j,k,bi,bj) = uPhi(1-i,j,k,bi,bj) |
167 |
c vPhi(1-i,j,k,bi,bj) = vPhi(1-i,j,k,bi,bj) |
168 |
c ENDDO |
169 |
c ENDDO |
170 |
c ENDIF |
171 |
C- North: (nothing to change) |
172 |
c IF (exch2_isNedge(myTile).EQ.1) THEN |
173 |
c DO j = 1,exchWidthY |
174 |
c DO i = 1-OLx,sNx+OLx |
175 |
c uPhi(i,sNy+j,k,bi,bj) = uPhi(i,sNy+j,k,bi,bj) |
176 |
c vPhi(i,sNy+j,k,bi,bj) = vPhi(i,sNy+j,k,bi,bj) |
177 |
c ENDDO |
178 |
c ENDDO |
179 |
c ENDIF |
180 |
C- South: |
181 |
IF (exch2_isSedge(myTile).EQ.1) THEN |
182 |
DO j = 1,exchWidthY |
183 |
DO i = 1-OLx,sNx+OLx |
184 |
uPhi(i,1-j,k,bi,bj) = uPhi(i,1-j,k,bi,bj)*negOne |
185 |
c vPhi(i,1-j,k,bi,bj) = vPhi(i,1-j,k,bi,bj) |
186 |
ENDDO |
187 |
ENDDO |
188 |
ENDIF |
189 |
|
190 |
C end odd / even faces |
191 |
ENDIF |
192 |
|
193 |
C-- end of Loops on tile and level indices (k,bi,bj). |
194 |
ENDDO |
195 |
ENDDO |
196 |
ENDDO |
197 |
|
198 |
C--- using or not using CubedSphereExchange: end |
199 |
ENDIF |
200 |
|
201 |
RETURN |
202 |
END |
203 |
|
204 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
205 |
|
206 |
CEH3 ;;; Local Variables: *** |
207 |
CEH3 ;;; mode:fortran *** |
208 |
CEH3 ;;; End: *** |