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C $Header: /u/gcmpack/MITgcm/pkg/exch2/exch2_uv_xy_rx.template,v 1.3 2004/04/05 15:27:06 edhill Exp $ |
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C $Name: $ |
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|
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#include "CPP_EEOPTIONS.h" |
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|
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CBOP |
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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 | Driver exchange routine which branches to cube sphere or |
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C | global, simple cartesian index grid. Exchange routine is |
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C | called with two arrays that are components of a vector. |
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C | These components are rotated and interchanged on the |
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C | 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 "EESUPPORT.h" |
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#include "W2_EXCH2_TOPOLOGY.h" |
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#include "W2_EXCH2_PARAMS.h" |
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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, i, j |
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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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C ** NOTE ** The exchange routine we use here does not |
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C require the preceeding and following barriers. |
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C However, the slow, simple exchange interface |
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C that is calling it here is meant to ensure |
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C that threads are synchronised before exchanges |
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C begine. |
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IF (useCubedSphereExchange) THEN |
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CALL EXCH2_RX2_CUBE( Uphi, Vphi, withSigns, 'UV', |
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I OLw, OLe, OLs, OLn, myNz, |
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I exchWidthX, exchWidthY, |
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I FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
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CALL EXCH2_RX2_CUBE( Uphi, Vphi, withSigns, 'UV', |
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I OLw, OLe, OLs, OLn, myNz, |
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I exchWidthX, exchWidthY, |
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I FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
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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) |
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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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|
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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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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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DO J=1-OLx,0 |
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DO I=1-OLx,0 |
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uPhi(I,J,bi,bj)=0. |
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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)=0. |
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ENDDO |
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ENDDO |
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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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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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DO J=sNy+1,sNy+OLy |
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DO I=1-OLx,0 |
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uPhi(I,J,bi,bj)=0. |
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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)=0. |
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ENDDO |
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ENDDO |
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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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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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DO J=1-OLx,0 |
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DO I=sNx+2,sNx+OLx |
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uPhi(I,J,bi,bj)=0. |
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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)=0. |
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ENDDO |
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ENDDO |
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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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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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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)=0. |
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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)=0. |
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ENDDO |
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ENDDO |
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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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ENDDO |
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ENDDO |
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|
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ELSE |
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c CALL EXCH_RX( Uphi, |
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c I OLw, OLe, OLs, OLn, myNz, |
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c I exchWidthX, exchWidthY, |
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c I FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
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c CALL EXCH_RX( Vphi, |
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c I OLw, OLe, OLs, OLn, myNz, |
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c I exchWidthX, exchWidthY, |
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c I FORWARD_SIMULATION, EXCH_UPDATE_CORNERS, myThid ) |
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c_jmc: for JAM compatibility, replace the 2 CALLs above by the 2 CPP_MACROs: |
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_EXCH_XY_RX( Uphi, myThid ) |
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_EXCH_XY_RX( Vphi, myThid ) |
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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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