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C $Header: /u/gcmpack/MITgcm/pkg/autodiff/global_sum_tile_ad.F,v 1.3 2010/04/22 22:23:37 jmc Exp $ |
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C $Name: $ |
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#include "AUTODIFF_OPTIONS.h" |
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C-- File global_sum_tile_ad.F: Routines that perform adjoint of |
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C global sum on an array of thread values. |
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C Contents |
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C o GLOBAL_ADSUM_TILE_RL |
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C o GLOBAL_ADSUM_TILE_RS <- not yet coded |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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C !ROUTINE: GLOBAL_ADSUM_TILE_RL |
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C !INTERFACE: |
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SUBROUTINE GLOBAL_ADSUM_TILE_RL( |
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O adPhiTile, |
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I adsumPhi, |
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I myThid ) |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE GLOBAL\_ADSUM\_TILE\_RL |
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C | o Adjoint version of global_sum_tile which returns |
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C | global sum over all tiles |
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C | Note: Assume that adsumPhi is local to this thread |
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C | (i.e., is not a shared var. and is not in a common block) |
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C *==========================================================* |
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C | Apply sum on an array of one value per tile |
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C | and operate over all tiles & all the processes. |
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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 phiTile :: Input array with one value per tile |
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C sumPhi :: Result of sum. |
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C myThid :: My Thread Id. |
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_RL adphiTile(nSx,nSy) |
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_RL adsumPhi |
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INTEGER myThid |
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CEOP |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C bi,bj :: tile indices |
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INTEGER bi,bj |
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Real*8 tmp |
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tmp = adsumPhi |
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CALL GLOBAL_SUM_R8( tmp, myThid ) |
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C-- each thread takes its tile adjoint sum |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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adphiTile(bi,bj) = tmp |
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ENDDO |
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ENDDO |
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C-- reset input to zero (jmc: is it right ? necessary ?) |
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c adsumPhi = 0. |
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RETURN |
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END |
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