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C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_uv_xy_rx.template,v 1.14 2010/05/06 23:28:46 jmc Exp $ |
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C $Name: $ |
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|
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#include "CPP_EEOPTIONS.h" |
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#include "W2_OPTIONS.h" |
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#undef DO_CORNER_COPY_V2U |
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|
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CBOP |
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|
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C !ROUTINE: EXCH_UV_XY_RX |
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|
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C !INTERFACE: |
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SUBROUTINE EXCH2_UV_XY_RX( |
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U Uphi, Vphi, withSigns, |
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I myThid ) |
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IMPLICIT NONE |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE EXCH_UV_XY_RX |
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C | o Handle exchanges for _RX, two-dimensional arrays. |
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C *==========================================================* |
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C | Exchange routine is called with two arrays that are |
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C | components of a vector. These components are rotated and |
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C | interchanged on the rotated grid during cube exchanges. |
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C *==========================================================* |
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|
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C !USES: |
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C === Global data === |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "W2_EXCH2_SIZE.h" |
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#include "W2_EXCH2_TOPOLOGY.h" |
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#ifdef W2_FILL_NULL_REGIONS |
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#include "W2_EXCH2_PARAMS.h" |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C Uphi :: Arrays with overlap regions are to be exchanged |
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C Vphi Note - The interface to EXCH_ assumes that |
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C the standard Fortran 77 sequence association rules |
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C apply. |
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C myThid :: My thread id. |
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C withSigns :: Flag controlling whether vector is signed. |
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_RX Uphi(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RX Vphi(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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LOGICAL withSigns |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C OL[wens] :: Overlap extents in west, east, north, south. |
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C exchWidth[XY] :: Extent of regions that will be exchanged. |
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INTEGER OLw, OLe, OLn, OLs, exchWidthX, exchWidthY, myNz |
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INTEGER bi, bj, myTile |
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#ifdef W2_FILL_NULL_REGIONS |
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INTEGER i, j |
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#else |
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# ifdef DO_CORNER_COPY_V2U |
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INTEGER j |
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# endif |
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#endif |
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CEOP |
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|
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OLw = OLx |
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OLe = OLx |
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OLn = OLy |
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OLs = OLy |
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exchWidthX = OLx |
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exchWidthY = OLy |
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myNz = 1 |
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|
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CALL EXCH2_RX2_CUBE( Uphi, Vphi, withSigns, 'Cg', |
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I OLw, OLe, OLs, OLn, myNz, |
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I exchWidthX, exchWidthY, |
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I EXCH_UPDATE_CORNERS, myThid ) |
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CALL EXCH2_RX2_CUBE( Uphi, Vphi, withSigns, 'Cg', |
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I OLw, OLe, OLs, OLn, myNz, |
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I exchWidthX, exchWidthY, |
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I EXCH_UPDATE_CORNERS, myThid ) |
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|
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IF (useCubedSphereExchange) THEN |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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myTile = W2_myTileList(bi,bj) |
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|
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#ifdef DO_CORNER_COPY_V2U |
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IF ( exch2_isEedge(myTile) .EQ. 1 .AND. |
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& exch2_isSedge(myTile) .EQ. 1 ) THEN |
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C Uphi(sNx+1, 0,bi,bj)= vPhi(sNx+1, 1,bi,bj) |
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DO j=1-olx,0 |
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Uphi(sNx+1, j,bi,bj)= vPhi(sNx+(1-j), 1,bi,bj) |
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ENDDO |
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ENDIF |
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IF ( withSigns ) THEN |
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IF ( exch2_isEedge(myTile) .EQ. 1 .AND. |
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& exch2_isNedge(myTile) .EQ. 1 ) THEN |
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C Uphi(sNx+1,sNy+1,bi,bj)=-vPhi(sNx+1,sNy+1,bi,bj) |
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DO j=1,olx |
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Uphi(sNx+1,sNy+j,bi,bj)=-vPhi(sNx+j,sNy+1,bi,bj) |
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ENDDO |
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ENDIF |
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ELSE |
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IF ( exch2_isEedge(myTile) .EQ. 1 .AND. |
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& exch2_isNedge(myTile) .EQ. 1 ) THEN |
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C Uphi(sNx+1,sNy+1,bi,bj)= vPhi(sNx+1,sNy+1,bi,bj) |
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DO j=1,olx |
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Uphi(sNx+1,sNy+j,bi,bj)= vPhi(sNx+j,sNy+1,bi,bj) |
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ENDDO |
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ENDIF |
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ENDIF |
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#endif /* DO_CORNER_COPY_V2U */ |
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|
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C-- Now zero out the null areas that should not be used in the numerics |
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C Also add one valid u,v value next to the corner, that allows |
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C to compute vorticity on a wider stencil (e.g., vort3(0,1) & (1,0)) |
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|
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IF ( exch2_isWedge(myTile) .EQ. 1 .AND. |
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& exch2_isSedge(myTile) .EQ. 1 ) THEN |
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C Zero SW corner points |
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#ifdef W2_FILL_NULL_REGIONS |
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DO j=1-OLx,0 |
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DO i=1-OLx,0 |
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uPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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DO j=1-OLx,0 |
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DO i=1-OLx,0 |
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vPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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#endif |
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uPhi(0,0,bi,bj)=vPhi(1,0,bi,bj) |
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vPhi(0,0,bi,bj)=uPhi(0,1,bi,bj) |
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ENDIF |
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|
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IF ( exch2_isWedge(myTile) .EQ. 1 .AND. |
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& exch2_isNedge(myTile) .EQ. 1 ) THEN |
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C Zero NW corner points |
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#ifdef W2_FILL_NULL_REGIONS |
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DO j=sNy+1,sNy+OLy |
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DO i=1-OLx,0 |
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uPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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DO j=sNy+2,sNy+OLy |
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DO i=1-OLx,0 |
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vPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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#endif |
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IF ( withSigns ) THEN |
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uPhi(0,sNy+1,bi,bj)=-vPhi(1,sNy+2,bi,bj) |
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vPhi(0,sNy+2,bi,bj)=-uPhi(0,sNy,bi,bj) |
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ELSE |
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uPhi(0,sNy+1,bi,bj)= vPhi(1,sNy+2,bi,bj) |
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vPhi(0,sNy+2,bi,bj)= uPhi(0,sNy,bi,bj) |
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ENDIF |
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ENDIF |
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|
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IF ( exch2_isEedge(myTile) .EQ. 1 .AND. |
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& exch2_isSedge(myTile) .EQ. 1 ) THEN |
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C Zero SE corner points |
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#ifdef W2_FILL_NULL_REGIONS |
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DO j=1-OLx,0 |
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DO i=sNx+2,sNx+OLx |
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uPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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DO j=1-OLx,0 |
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DO i=sNx+1,sNx+OLx |
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vPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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#endif |
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IF ( withSigns ) THEN |
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uPhi(sNx+2,0,bi,bj)=-vPhi(sNx,0,bi,bj) |
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vPhi(sNx+1,0,bi,bj)=-uPhi(sNx+2,1,bi,bj) |
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ELSE |
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uPhi(sNx+2,0,bi,bj)= vPhi(sNx,0,bi,bj) |
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vPhi(sNx+1,0,bi,bj)= uPhi(sNx+2,1,bi,bj) |
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ENDIF |
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ENDIF |
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|
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IF ( exch2_isEedge(myTile) .EQ. 1 .AND. |
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& exch2_isNedge(myTile) .EQ. 1 ) THEN |
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C Zero NE corner points |
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#ifdef W2_FILL_NULL_REGIONS |
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DO j=sNy+1,sNy+OLy |
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DO i=sNx+2,sNx+OLx |
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uPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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DO j=sNy+2,sNy+OLy |
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DO i=sNx+1,sNx+OLx |
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vPhi(i,j,bi,bj)=e2FillValue_RX |
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ENDDO |
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ENDDO |
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#endif |
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uPhi(sNx+2,sNy+1,bi,bj)=vPhi(sNx,sNy+2,bi,bj) |
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vPhi(sNx+1,sNy+2,bi,bj)=uPhi(sNx+2,sNy,bi,bj) |
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ENDIF |
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|
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C- end bi,bj loops. |
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ENDDO |
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ENDDO |
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|
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C--- using or not using CubedSphereExchange: end |
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ENDIF |
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|
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RETURN |
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END |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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CEH3 ;;; Local Variables: *** |
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CEH3 ;;; mode:fortran *** |
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CEH3 ;;; End: *** |
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