| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch_uv_agrid_xy_rx.template,v 1.3 2004/09/07 17:29:14 edhill Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "PACKAGES_CONFIG.h" |
| 5 |
#include "CPP_EEOPTIONS.h" |
| 6 |
|
| 7 |
SUBROUTINE EXCH_UV_AGRID_XY_RX( component1,component2, myThid ) |
| 8 |
|
| 9 |
implicit none |
| 10 |
|
| 11 |
C*=====================================================================* |
| 12 |
C Purpose: subroutine exch_uv_agrid_xyz_RX will |
| 13 |
C handle exchanges for a 2D vector field on an A-grid. |
| 14 |
C |
| 15 |
C Input: component1(lon,lat,bi,bj) - first component of vector |
| 16 |
C component2(lon,lat,bi,bj) - second component of vector |
| 17 |
C myThid - tile number |
| 18 |
C |
| 19 |
C Output: component1 and component2 are updated (halo regions filled) |
| 20 |
C |
| 21 |
C Calls: exch (either exch_rx_cube or exch_rx) - twice, once |
| 22 |
C for the first-component, once for second. |
| 23 |
C |
| 24 |
C NOTES: 1) This code, as written, only works on ONE PROCESSOR! |
| 25 |
C 2) This code assumes that the faces are square (sNx=sNy....) |
| 26 |
C (also - we do not worry about barriers) |
| 27 |
C*=====================================================================* |
| 28 |
|
| 29 |
#include "SIZE.h" |
| 30 |
#include "EEPARAMS.h" |
| 31 |
#include "EESUPPORT.h" |
| 32 |
#include "EXCH.h" |
| 33 |
|
| 34 |
C == Argument list variables == |
| 35 |
_RX component1(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 36 |
_RX component2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 37 |
INTEGER myThid |
| 38 |
|
| 39 |
C == Local variables == |
| 40 |
C i,j,L,bi,bj are do indices. |
| 41 |
C OL[wens] - Overlap extents in west, east, north, south. |
| 42 |
C exchWidth[XY] - Extent of regions that will be exchanged. |
| 43 |
C dummy[12] - copies of the vector components with haloes filled. |
| 44 |
C b[nsew] - indices of the [nswe] neighboring faces for each face. |
| 45 |
|
| 46 |
integer i,j,L,bi,bj |
| 47 |
integer OLw, OLe, OLn, OLs, exchWidthX, exchWidthY, myNz |
| 48 |
_RX dummy1(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 49 |
_RX dummy2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 50 |
|
| 51 |
#ifdef ALLOW_EXCH2 |
| 52 |
CALL EXCH2_UV_AGRID_XY_RX( component1,component2, myThid ) |
| 53 |
RETURN |
| 54 |
#endif |
| 55 |
|
| 56 |
OLw = OLx |
| 57 |
OLe = OLx |
| 58 |
OLn = OLy |
| 59 |
OLs = OLy |
| 60 |
exchWidthX = OLx |
| 61 |
exchWidthY = OLy |
| 62 |
myNz = 1 |
| 63 |
|
| 64 |
C First call the exchanges for the two components |
| 65 |
|
| 66 |
if (useCubedSphereExchange) then |
| 67 |
call exch_RX_cube( component1, |
| 68 |
. OLw, OLe, OLs, OLn, myNz, |
| 69 |
. exchWidthX, exchWidthY, |
| 70 |
. FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
| 71 |
call exch_RX_cube( component2, |
| 72 |
. OLw, OLe, OLs, OLn, myNz, |
| 73 |
. exchWidthX, exchWidthY, |
| 74 |
. FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
| 75 |
else |
| 76 |
call exch_RX( component1, |
| 77 |
. OLw, OLe, OLs, OLn, myNz, |
| 78 |
. exchWidthX, exchWidthY, |
| 79 |
. FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
| 80 |
call exch_RX( component2, |
| 81 |
. OLw, OLe, OLs, OLn, myNz, |
| 82 |
. exchWidthX, exchWidthY, |
| 83 |
. FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
| 84 |
endif |
| 85 |
|
| 86 |
C Then if we are on the sphere we may need to switch u and v components |
| 87 |
C and/or the signs depending on which cube face we are located. |
| 88 |
|
| 89 |
if (useCubedSphereExchange) then |
| 90 |
|
| 91 |
do bj = myByLo(myThid), myByHi(myThid) |
| 92 |
do bi = myBxLo(myThid), myBxHi(myThid) |
| 93 |
|
| 94 |
C First we need to copy the component info into dummy arrays |
| 95 |
do j = 1-OLy,sNy+OLy |
| 96 |
do i = 1-OLx,sNx+OLx |
| 97 |
dummy1(i,j,bi,bj) = component1(i,j,bi,bj) |
| 98 |
dummy2(i,j,bi,bj) = component2(i,j,bi,bj) |
| 99 |
enddo |
| 100 |
enddo |
| 101 |
|
| 102 |
C Now choose what to do at each edge of the halo based on which face |
| 103 |
C (we assume that bj is always=1) |
| 104 |
|
| 105 |
C odd faces share disposition of all sections of the halo |
| 106 |
if ( mod(bi,2).eq.1 ) then |
| 107 |
do j = 1,sNy |
| 108 |
do i = 1,exchWidthX |
| 109 |
C east |
| 110 |
component1(sNx+i,j,bi,bj) = dummy1(sNx+i,j,bi,bj) |
| 111 |
component2(sNx+i,j,bi,bj) = dummy2(sNx+i,j,bi,bj) |
| 112 |
C west |
| 113 |
component1(i-OLx,j,bi,bj) = dummy2(i-OLx,j,bi,bj) |
| 114 |
component2(i-OLx,j,bi,bj) = -dummy1(i-OLx,j,bi,bj) |
| 115 |
C north |
| 116 |
component1(j,sNy+i,bi,bj) = -dummy2(j,sNy+i,bi,bj) |
| 117 |
component2(j,sNy+i,bi,bj) = dummy1(j,sNy+i,bi,bj) |
| 118 |
C south |
| 119 |
component1(j,i-OLx,bi,bj) = dummy1(j,i-OLx,bi,bj) |
| 120 |
component2(j,i-OLx,bi,bj) = dummy2(j,i-OLx,bi,bj) |
| 121 |
enddo |
| 122 |
enddo |
| 123 |
C now the even faces (share disposition of all sections of the halo) |
| 124 |
elseif ( mod(bi,2).eq.0 ) then |
| 125 |
do j = 1,sNy |
| 126 |
do i = 1,exchWidthX |
| 127 |
C east |
| 128 |
component1(sNx+i,j,bi,bj) = dummy2(sNx+i,j,bi,bj) |
| 129 |
component2(sNx+i,j,bi,bj) = -dummy1(sNx+i,j,bi,bj) |
| 130 |
C west |
| 131 |
component1(i-OLx,j,bi,bj) = dummy1(i-OLx,j,bi,bj) |
| 132 |
component2(i-OLx,j,bi,bj) = dummy2(i-OLx,j,bi,bj) |
| 133 |
C north |
| 134 |
component1(j,sNy+i,bi,bj) = dummy1(j,sNy+i,bi,bj) |
| 135 |
component2(j,sNy+i,bi,bj) = dummy2(j,sNy+i,bi,bj) |
| 136 |
C south |
| 137 |
component1(j,i-OLy,bi,bj) = -dummy2(j,i-OLy,bi,bj) |
| 138 |
component2(j,i-OLy,bi,bj) = dummy1(j,i-OLy,bi,bj) |
| 139 |
enddo |
| 140 |
enddo |
| 141 |
endif |
| 142 |
|
| 143 |
enddo |
| 144 |
enddo |
| 145 |
|
| 146 |
endif |
| 147 |
|
| 148 |
RETURN |
| 149 |
END |
| 150 |
|
| 151 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 152 |
|
| 153 |
CEH3 ;;; Local Variables: *** |
| 154 |
CEH3 ;;; mode:fortran *** |
| 155 |
CEH3 ;;; End: *** |
Parent Directory
| 
Revision Log
| 
Revision Graph