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adcroft |
1.1.2.1 |
C $Header: $ |
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C $Name: $ |
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#include "CPP_EEOPTIONS.h" |
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SUBROUTINE EXCH_UV_XY_RX( |
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U Uphi, Vphi, withSigns, |
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I myThid ) |
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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 | Do true shared-memory data transfers and "messaging" | |
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C | tranfers for blocking case of data transfers. | |
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C | Applications call this routine using | |
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C | CALL EXCH..( x, myThid ) | |
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C | where x is a two-dimensional array with overlaps. | |
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C | This routine does true-shared-memory copies for blocks | |
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C | within a thread. It will also do MPI meesaging between | |
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C | different processes. | |
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C | Note: | |
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C | ===== | |
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C | This routine is a default mode interface to the more | |
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C | general exchange routine. Under default mode the | |
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C | exchange is for an edge width of OLx, and OLy and | |
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C | updates corner points as well as edges ( slightly more | |
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C | synchronisation required). | |
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C \==========================================================/ |
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IMPLICIT NONE |
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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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C === Routine arguments === |
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C phi - Array with overlap regions are to be exchanged |
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C Note - The interface to EXCH_RL 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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_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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CEndOfInterface |
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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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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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_BARRIER |
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IF (useCubedSphereExchange) THEN |
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CALL EXCH_UV_RX_CUBE( Uphi, Vphi, withSigns, |
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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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ELSE |
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CALL EXCH_RX( Uphi, |
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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 EXCH_RX( Vphi, |
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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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ENDIF |
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_BARRIER |
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RETURN |
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END |
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