| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_interp_read.F,v 1.7 2006/12/13 18:37:21 dimitri Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "EXF_OPTIONS.h" |
| 5 |
|
| 6 |
SUBROUTINE exf_interp_read( |
| 7 |
I infile, filePrec, |
| 8 |
O arrayin, |
| 9 |
I irecord, nx_in, ny_in, mythid) |
| 10 |
|
| 11 |
implicit none |
| 12 |
|
| 13 |
C infile = name of the input file (direct access binary) |
| 14 |
C filePrec = file precicision (currently not used, assumes real*4) |
| 15 |
C arrout = output arrays (different for each processor) |
| 16 |
C irecord = record number in global file |
| 17 |
C nx_in, ny_in = input x-grid and y-grid size |
| 18 |
C mythid = thread id |
| 19 |
|
| 20 |
#include "SIZE.h" |
| 21 |
#include "EEPARAMS.h" |
| 22 |
#ifdef ALLOW_USE_MPI |
| 23 |
# include "EESUPPORT.h" |
| 24 |
#endif /* ALLOW_USE_MPI */ |
| 25 |
#include "PARAMS.h" |
| 26 |
|
| 27 |
#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
| 28 |
C When using threads the address of the local automatic array |
| 29 |
C "global" is not visible to the other threads. So we create |
| 30 |
C a pointer to share that address here. This is presently |
| 31 |
C in an ifdef because it won't go through g77 and I'm not |
| 32 |
C currently sure what TAF would do with this. |
| 33 |
COMMON /EXF_IOPTR/ glPtr |
| 34 |
REAL*4, POINTER :: glPtr(:,:) |
| 35 |
#endif |
| 36 |
|
| 37 |
C subroutine variables |
| 38 |
character*(*) infile |
| 39 |
integer filePrec, irecord, nx_in, ny_in |
| 40 |
real*4 arrayin(-1:nx_in+2 , -1:ny_in+2) |
| 41 |
integer mythid |
| 42 |
|
| 43 |
C Functions |
| 44 |
integer MDS_RECLEN |
| 45 |
|
| 46 |
C local variables |
| 47 |
integer ierr, length_of_rec |
| 48 |
real*8 ne_fac,nw_fac,se_fac,sw_fac |
| 49 |
integer e_ind(snx,sny),w_ind(snx,sny) |
| 50 |
integer n_ind(snx,sny),s_ind(snx,sny) |
| 51 |
real*8 px_ind(4), py_ind(4), ew_val(4) |
| 52 |
external lagran |
| 53 |
real*8 lagran |
| 54 |
integer i, j, k, l, js, bi, bj, sp, interp_unit |
| 55 |
#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
| 56 |
real*4, target :: global(nx_in,ny_in) |
| 57 |
#else |
| 58 |
real*4 global(nx_in,ny_in) |
| 59 |
#endif |
| 60 |
|
| 61 |
_BARRIER |
| 62 |
_BEGIN_MASTER( myThid ) |
| 63 |
|
| 64 |
#ifndef EXF_IREAD_USE_GLOBAL_POINTER |
| 65 |
C The CPP symbol EXF_IREAD_USE_GLOBAL_POINTER must be defined for the |
| 66 |
C case of nThreads > 1. Stop if it isnt. |
| 67 |
IF ( nThreads .GT. 1 ) THEN |
| 68 |
STOP |
| 69 |
&'EXF_INTERP_READ: nThreads > 1 needs EXF_IREAD_USE_GLOBAL_POINTER' |
| 70 |
ENDIF |
| 71 |
#endif |
| 72 |
C check input arguments |
| 73 |
IF ( .NOT. (filePrec .EQ. 32) ) |
| 74 |
& STOP 'stop in exf_interp.F: value of filePrec not allowed' |
| 75 |
|
| 76 |
C read in input data |
| 77 |
#ifdef ALLOW_USE_MPI |
| 78 |
#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
| 79 |
if (.FALSE.) then |
| 80 |
#else |
| 81 |
if (useSingleCPUIO) then |
| 82 |
#endif |
| 83 |
|
| 84 |
C master thread of process 0, only, opens a global file |
| 85 |
IF( mpiMyId .EQ. 0 ) THEN |
| 86 |
call mdsfindunit( interp_unit, mythid) |
| 87 |
length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
| 88 |
open(interp_unit,file=infile,status='old',access='direct', |
| 89 |
& recl=length_of_rec) |
| 90 |
read(interp_unit,rec=irecord) |
| 91 |
& ((global(i,j),i=1,nx_in),j=1,ny_in) |
| 92 |
close(interp_unit) |
| 93 |
ENDIF |
| 94 |
|
| 95 |
C broadcast to all processes |
| 96 |
call MPI_BCAST(global,nx_in*ny_in,MPI_REAL, |
| 97 |
& 0,MPI_COMM_MODEL,ierr) |
| 98 |
else |
| 99 |
#endif /* ALLOW_USE_MPI */ |
| 100 |
|
| 101 |
call mdsfindunit( interp_unit, mythid) |
| 102 |
length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
| 103 |
open(interp_unit,file=infile,status='old',access='direct', |
| 104 |
& recl=length_of_rec) |
| 105 |
read(interp_unit,rec=irecord) global |
| 106 |
close(interp_unit) |
| 107 |
|
| 108 |
#ifdef ALLOW_USE_MPI |
| 109 |
endif |
| 110 |
#endif /* ALLOW_USE_MPI */ |
| 111 |
#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
| 112 |
glPtr => global |
| 113 |
#endif |
| 114 |
_END_MASTER( myThid ) |
| 115 |
_BARRIER |
| 116 |
#ifdef EXF_IREAD_USE_GLOBAL_POINTER |
| 117 |
do j=1,ny_in |
| 118 |
do i=1,nx_in |
| 119 |
arrayin(i,j)=glPtr(i,j) |
| 120 |
enddo |
| 121 |
enddo |
| 122 |
#else |
| 123 |
do j=1,ny_in |
| 124 |
do i=1,nx_in |
| 125 |
arrayin(i,j)=global(i,j) |
| 126 |
enddo |
| 127 |
enddo |
| 128 |
#endif |
| 129 |
|
| 130 |
#ifdef _BYTESWAPIO |
| 131 |
call MDS_BYTESWAPR4((nx_in+4)*(ny_in+4), arrayin ) |
| 132 |
#endif /* _BYTESWAPIO */ |
| 133 |
|
| 134 |
RETURN |
| 135 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph