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C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_interp_read.F,v 1.6 2006/10/15 14:08:10 dimitri Exp $ |
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C $Name: $ |
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|
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#include "EXF_OPTIONS.h" |
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|
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SUBROUTINE exf_interp_read( |
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I infile, filePrec, |
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O arrayin, |
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I irecord, nx_in, ny_in, mythid) |
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|
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implicit none |
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|
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C infile = name of the input file (direct access binary) |
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C filePrec = file precicision (currently not used, assumes real*4) |
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C arrout = output arrays (different for each processor) |
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C irecord = record number in global file |
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C nx_in, ny_in = input x-grid and y-grid size |
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C mythid = thread id |
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|
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#ifdef ALLOW_USE_MPI |
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# include "EESUPPORT.h" |
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#endif /* ALLOW_USE_MPI */ |
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#include "PARAMS.h" |
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|
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#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
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C When using threads the address of the local automatic array |
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C "global" is not visible to the other threads. So we create |
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C a pointer to share that address here. This is presently |
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C in an ifdef because it won't go through g77 and I'm not |
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C currently sure what TAF would do with this. |
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COMMON /EXF_IOPTR/ glPtr |
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REAL*4, POINTER :: glPtr(:,:) |
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#endif |
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|
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C subroutine variables |
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character*(*) infile |
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integer filePrec, irecord, nx_in, ny_in |
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real*4 arrayin(-1:nx_in+2 , -1:ny_in+2) |
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integer mythid |
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|
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C Functions |
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integer MDS_RECLEN |
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|
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C local variables |
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integer ierr, length_of_rec |
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real*8 ne_fac,nw_fac,se_fac,sw_fac |
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integer e_ind(snx,sny),w_ind(snx,sny) |
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integer n_ind(snx,sny),s_ind(snx,sny) |
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real*8 px_ind(4), py_ind(4), ew_val(4) |
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external lagran |
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real*8 lagran |
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integer i, j, k, l, js, bi, bj, sp, interp_unit |
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#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
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real*4, target :: global(nx_in,ny_in) |
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#else |
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real*4 global(nx_in,ny_in) |
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#endif |
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|
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_BARRIER |
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_BEGIN_MASTER( myThid ) |
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|
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#ifndef EXF_IREAD_USE_GLOBAL_POINTER |
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C The CPP symbol EXF_IREAD_USE_GLOBAL_POINTER must be defined for the |
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C case of nThreads > 1. Stop if it isnt. |
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IF ( nThreads .GT. 1 ) THEN |
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STOP |
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&'EXF_INTERP_READ: nThreads > 1 needs EXF_IREAD_USE_GLOBAL_POINTER' |
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ENDIF |
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#endif |
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|
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C read in input data |
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#ifdef ALLOW_USE_MPI |
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#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
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if (.FALSE.) then |
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#else |
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if (useSingleCPUIO) then |
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#endif |
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|
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C master thread of process 0, only, opens a global file |
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IF( mpiMyId .EQ. 0 ) THEN |
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call mdsfindunit( interp_unit, mythid) |
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length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
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open(interp_unit,file=infile,status='old',access='direct', |
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& recl=length_of_rec) |
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read(interp_unit,rec=irecord) |
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& ((global(i,j),i=1,nx_in),j=1,ny_in) |
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close(interp_unit) |
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ENDIF |
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|
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C broadcast to all processes |
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call MPI_BCAST(global,nx_in*ny_in,MPI_REAL, |
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& 0,MPI_COMM_MODEL,ierr) |
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else |
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#endif /* ALLOW_USE_MPI */ |
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|
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call mdsfindunit( interp_unit, mythid) |
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length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
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open(interp_unit,file=infile,status='old',access='direct', |
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& recl=length_of_rec) |
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read(interp_unit,rec=irecord) global |
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close(interp_unit) |
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|
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#ifdef ALLOW_USE_MPI |
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endif |
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#endif /* ALLOW_USE_MPI */ |
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#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
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glPtr => global |
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#endif |
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_END_MASTER( myThid ) |
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_BARRIER |
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#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
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do j=1,ny_in |
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do i=1,nx_in |
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arrayin(i,j)=glPtr(i,j) |
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enddo |
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enddo |
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#else |
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do j=1,ny_in |
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do i=1,nx_in |
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arrayin(i,j)=global(i,j) |
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enddo |
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enddo |
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#endif |
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|
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#ifdef _BYTESWAPIO |
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call MDS_BYTESWAPR4((nx_in+4)*(ny_in+4), arrayin ) |
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#endif /* _BYTESWAPIO */ |
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|
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RETURN |
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END |
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