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jmc |
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C $Header: /u/gcmpack/MITgcm/eesupp/src/exch_bg_rx_cube.template,v 1.3 2010/05/04 00:39:52 jmc Exp $ |
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C $Name: $ |
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#include "CPP_EEOPTIONS.h" |
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CBOP |
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C !ROUTINE: EXCH1_BG_RX_CUBE |
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C !INTERFACE: |
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SUBROUTINE EXCH1_BG_RX_CUBE( |
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U uField, vField, |
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I withSigns, |
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I myOLw, myOLe, myOLs, myOLn, myNz, |
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I exchWidthX, exchWidthY, |
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I cornerMode, myThid ) |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE EXCH1_BG_RX_CUBE |
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C | o Forward-mode edge exchanges for RX vector on CS config: |
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C | Fill overlap region through tile exchanges, |
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C | according to CS topology, |
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C | for a 2-Components B-Grid vector field RX arrays. |
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C *==========================================================* |
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C | Proceeds in 2 steps : |
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C | 1) fill the edges to get valid fields over (1:sNx+1,1:sNy+1) |
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C | 2) fill in overlap region: |
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C | (1-Olx:0 & sNx+2:sNx+Olx) x (1-Oly:0 & sNy+2:sNy+Oly) |
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C | Only works: a) with exactly 6 tiles (1 per face) |
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C | b) no MPI |
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C | c) thread shared arrays (in common block) |
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C *==========================================================* |
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C !USES: |
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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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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C uField :: 1rst component array with overlap to exchange. |
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C vField :: 2nd component array with overlap to exchange. |
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C withSigns :: sign of uField,vField depends on orientation. |
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C myOLw,myOLe :: West and East overlap region sizes. |
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C myOLs,myOLn :: South and North overlap region sizes. |
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C exchWidthX :: Width of data region exchanged in X. |
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C exchWidthY :: Width of data region exchanged in Y. |
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C Note -- |
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C 1. In theory one could have a send width and |
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C a receive width for each face of each tile. The only |
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C restriction would be that the send width of one |
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C face should equal the receive width of the sent to |
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C tile face. Dont know if this would be useful. I |
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C have left it out for now as it requires additional |
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C bookeeping. |
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C cornerMode :: Flag indicating whether corner updates are needed. |
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C myThid :: my Thread Id number |
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INTEGER myOLw, myOLe, myOLs, myOLn, myNz |
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_RX uField( 1-myOLw:sNx+myOLe, 1-myOLs:sNy+myOLn, |
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& myNz, nSx, nSy ) |
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_RX vField( 1-myOLw:sNx+myOLe, 1-myOLs:sNy+myOLn, |
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& myNz, nSx, nSy ) |
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LOGICAL withSigns |
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INTEGER exchWidthX |
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INTEGER exchWidthY |
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INTEGER cornerMode |
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INTEGER myThid |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C theSimulationMode :: Holds working copy of simulation mode |
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C theCornerMode :: Holds working copy of corner mode |
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C i,j,k,repeat :: Loop counters and index |
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C bt,bn,bs,be,bw |
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c INTEGER theSimulationMode |
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c INTEGER theCornerMode |
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INTEGER i,j,k |
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INTEGER updateEdges, j1, j2, j3 |
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INTEGER bt,bn,bs,be,bw |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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_RX negOne |
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C == Statement function == |
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INTEGER tilemod |
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tilemod(i)=1+mod(i-1+6,6) |
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CEOP |
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c theSimulationMode = FORWARD_SIMULATION |
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c theCornerMode = cornerMode |
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c IF ( simulationMode.EQ.REVERSE_SIMULATION ) THEN |
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c WRITE(msgBuf,'(A)')'EXCH1_BG_RX_CUBE: AD mode not implemented' |
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c CALL PRINT_ERROR( msgBuf, myThid ) |
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c STOP 'ABNORMAL END: EXCH1_BG_RX_CUBE: no AD code' |
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c ENDIF |
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IF ( sNx.NE.sNy .OR. |
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& nSx.NE.6 .OR. nSy.NE.1 .OR. |
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& nPx.NE.1 .OR. nPy.NE.1 ) THEN |
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WRITE(msgBuf,'(2A)') 'EXCH1_BG_RX_CUBE: Wrong Tiling' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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WRITE(msgBuf,'(2A)') 'EXCH1_BG_RX_CUBE: ', |
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& 'works only with sNx=sNy & nSx=6 & nSy=nPx=nPy=1' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: EXCH1_BG_RX_CUBE: Wrong Tiling' |
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ENDIF |
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C-- Could by-pass 1rst step (with updateEdges= 0) if vector field is |
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C valid over (1:sNx+1,1:sNy+1); In general this should be the case |
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C for correct computation domain; but some exceptions ? + I/O problems |
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C-- Exch of 2-Components vector (assumed to be 90.deg apart) at corner |
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C point is ill defined since we have 3 axes @ 120.deg apart. |
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C go with 3 options : |
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C updateEdges = 1 : do not touch corner values ; |
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C updateEdges = 2 : copy from corresponding face S.W corner (<= clear owner) |
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C and do nothing for missing corners ; |
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C updateEdges = 3 : copy all corner values. |
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C------ |
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updateEdges = 2 |
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IF ( withSigns ) updateEdges = MIN(1,updateEdges) |
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negOne = 1. |
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IF (withSigns) negOne = -1. |
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C For now tile<->tile exchanges are sequentialised through |
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C thread 1. This is a temporary feature for preliminary testing until |
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C general tile decomposistion is in place (CNH April 11, 2001) |
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CALL BAR2( myThid ) |
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_BEGIN_MASTER( myThid ) |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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IF ( updateEdges.GT.0 ) THEN |
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C-- 1rst Step : Just fill-in North (j=sNy+1) & East (i=sNx+1) edges |
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j1 = 2 |
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j2 = 2 |
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j3 = sNy |
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IF ( updateEdges.GE.2 ) THEN |
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j1 = 1 |
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j3 = sNy+1 |
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ENDIF |
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IF ( updateEdges.EQ.3 ) j2 = 1 |
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DO bt = 1,nSx |
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IF ( MOD(bt,2).EQ.1 ) THEN |
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C Odd face Number: |
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bn=tilemod(bt+2) |
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bs=tilemod(bt-1) |
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be=tilemod(bt+1) |
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bw=tilemod(bt-2) |
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i = 1 |
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DO k = 1, myNz |
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C Tile Odd:Odd+2 [get] [North<-West] |
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DO j = j2, j3 |
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uField(j,sNy+i,k,bt,1) = vField(i,sNy+2-j,k,bn,1)*negOne |
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vField(j,sNy+i,k,bt,1) = uField(i,sNy+2-j,k,bn,1) |
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ENDDO |
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C Tile Odd:Odd+1 [get] [East<-West] |
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DO j = j1, sNy |
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uField(sNx+i,j,k,bt,1) = uField(i,j,k,be,1) |
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vField(sNx+i,j,k,bt,1) = vField(i,j,k,be,1) |
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ENDDO |
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ENDDO |
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ELSE |
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C Even face Number: |
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bn=tilemod(bt+1) |
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bs=tilemod(bt-2) |
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be=tilemod(bt+2) |
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bw=tilemod(bt-1) |
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i = 1 |
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DO k = 1, myNz |
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C Tile Even:Even+1 [get] [North<-South] |
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DO j = j1, sNy |
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uField(j,sNy+i,k,bt,1) = uField(j,i,k,bn,1) |
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vField(j,sNy+i,k,bt,1) = vField(j,i,k,bn,1) |
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ENDDO |
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C Tile Even:Even+2 [get] [East<-South] |
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DO j = j2, j3 |
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uField(sNx+i,j,k,bt,1) = vField(sNx+2-j,i,k,be,1) |
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vField(sNx+i,j,k,bt,1) = uField(sNx+2-j,i,k,be,1)*negOne |
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ENDDO |
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ENDDO |
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C-- end odd/even face number |
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ENDIF |
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C-- end loop on tile index bt |
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ENDDO |
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C-- End of 1rst Step |
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ENDIF |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C-- 2nd Step: fill-in (true) overlap regions: |
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DO bt = 1,nSx |
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IF ( MOD(bt,2).EQ.1 ) THEN |
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C Odd face Number: |
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bn=tilemod(bt+2) |
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bs=tilemod(bt-1) |
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be=tilemod(bt+1) |
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bw=tilemod(bt-2) |
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DO k = 1, myNz |
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DO j = 1, sNy+1 |
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DO i = 2, exchWidthX |
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C Tile Odd:Odd+2 [get] [North<-West] |
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uField(j,sNy+i,k,bt,1) = vField(i,sNy+2-j,k,bn,1)*negOne |
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vField(j,sNy+i,k,bt,1) = uField(i,sNy+2-j,k,bn,1) |
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C Tile Odd:Odd+1 [get] [East<-West] |
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uField(sNx+i,j,k,bt,1) = uField(i,j,k,be,1) |
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vField(sNx+i,j,k,bt,1) = vField(i,j,k,be,1) |
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ENDDO |
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DO i = 1-exchWidthX, 0 |
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C Tile Odd:Odd-1 [get] [South<-North] |
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uField(j,i,k,bt,1) = uField(j,sNy+i,k,bs,1) |
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vField(j,i,k,bt,1) = vField(j,sNy+i,k,bs,1) |
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C Tile Odd:Odd-2 [get] [West<-North] |
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uField(i,j,k,bt,1) = vField(sNx+2-j,sNy+i,k,bw,1) |
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vField(i,j,k,bt,1) = uField(sNx+2-j,sNy+i,k,bw,1)*negOne |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSE |
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C Even face Number: |
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bn=tilemod(bt+1) |
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bs=tilemod(bt-2) |
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be=tilemod(bt+2) |
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bw=tilemod(bt-1) |
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DO k = 1, myNz |
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DO j = 1, sNy+1 |
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DO i = 2, exchWidthX |
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C Tile Even:Even+2 [get] [East<-South] |
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uField(sNx+i,j,k,bt,1) = vField(sNx+2-j,i,k,be,1) |
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vField(sNx+i,j,k,bt,1) = uField(sNx+2-j,i,k,be,1)*negOne |
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C Tile Even:Even+1 [get] [North<-South] |
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uField(j,sNy+i,k,bt,1) = uField(j,i,k,bn,1) |
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vField(j,sNy+i,k,bt,1) = vField(j,i,k,bn,1) |
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ENDDO |
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DO i = 1-exchWidthX, 0 |
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C Tile Even:Even-2 [get] [South<-East] |
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uField(j,i,k,bt,1) = vField(sNx+i,sNy+2-j,k,bs,1)*negOne |
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vField(j,i,k,bt,1) = uField(sNx+i,sNy+2-j,k,bs,1) |
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C Tile Even:Even-1 [get] [West<-East] |
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uField(i,j,k,bt,1) = uField(sNx+i,j,k,bw,1) |
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vField(i,j,k,bt,1) = vField(sNx+i,j,k,bw,1) |
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ENDDO |
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ENDDO |
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ENDDO |
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C-- end odd/even face number |
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ENDIF |
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C-- end loop on tile index bt |
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ENDDO |
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_END_MASTER( myThid ) |
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CALL BAR2(myThid) |
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RETURN |
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END |
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