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|
*
* subtract.F
*
* Jonathan Callahan
* Feb 19th 1998
*
* Returns the difference of two arguments.
*
*
* In this subroutine we provide information about
* the function. The user configurable information
* consists of the following:
*
* descr Text description of the function
*
* num_args Required number of arguments
*
* axis_inheritance Type of axis for the result
* ( CUSTOM, IMPLIED_BY_ARGS, NORMAL, ABSTRACT )
* CUSTOM - user defined axis
* IMPLIED_BY_ARGS - same axis as the incoming argument
* NORMAL - the result is normal to this axis
* ABSTRACT - an axis which only has index values
*
* piecemeal_ok For memory optimization:
* axes where calculation may be performed piecemeal
* ( YES, NO )
*
*
* For each argument we provide the following information:
*
* name Text name for an argument
*
* unit Text units for an argument
*
* desc Text description of an argument
*
* axis_influence Are this argument's axes the same as the result grid?
* ( YES, NO )
*
* axis_extend How much does Ferret need to extend arg limits relative to result
*
SUBROUTINE subtract_init(id)
INCLUDE 'ferret_cmn/EF_Util.cmn'
INTEGER id, arg
* **********************************************************************
* USER CONFIGURABLE PORTION |
* |
* V
CALL ef_set_desc(id,'(demonstration function) returns: A - B' )
CALL ef_set_num_args(id, 2)
CALL ef_set_axis_inheritance_6d(id,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS,
. IMPLIED_BY_ARGS, IMPLIED_BY_ARGS)
CALL ef_set_piecemeal_ok_6d(id, YES, YES, YES, YES, YES, YES)
arg = 1
CALL ef_set_arg_name(id, arg, 'A')
CALL ef_set_axis_influence_6d(id, arg,
. YES, YES, YES, YES, YES, YES)
arg = 2
CALL ef_set_arg_name(id, arg, 'B')
CALL ef_set_axis_influence_6d(id, arg,
. YES, YES, YES, YES, YES, YES)
* ^
* |
* USER CONFIGURABLE PORTION |
* **********************************************************************
RETURN
END
*
* In this subroutine we compute the result
*
SUBROUTINE subtract_compute(id, arg_1, arg_2, result)
IMPLICIT NONE
INCLUDE 'ferret_cmn/EF_Util.cmn'
INCLUDE 'ferret_cmn/EF_mem_subsc.cmn'
INTEGER id
REAL arg_1(mem1lox:mem1hix, mem1loy:mem1hiy, mem1loz:mem1hiz,
. mem1lot:mem1hit, mem1loe:mem1hie, mem1lof:mem1hif)
REAL arg_2(mem2lox:mem2hix, mem2loy:mem2hiy, mem2loz:mem2hiz,
. mem2lot:mem2hit, mem2loe:mem2hie, mem2lof:mem2hif)
REAL result(memreslox:memreshix, memresloy:memreshiy,
. memresloz:memreshiz, memreslot:memreshit,
. memresloe:memreshie, memreslof:memreshif)
* After initialization, the 'res_' arrays contain indexing information
* for the result axes. The 'arg_' arrays will contain the indexing
* information for each variable's axes.
INTEGER res_lo_ss(6),
. res_hi_ss(6),
. res_incr (6)
INTEGER arg_lo_ss(6,EF_MAX_ARGS),
. arg_hi_ss(6,EF_MAX_ARGS),
. arg_incr (6,EF_MAX_ARGS)
REAL bad_flag(EF_MAX_ARGS), bad_flag_result
* **********************************************************************
* USER CONFIGURABLE PORTION |
* |
* V
INTEGER i, j, k, l, m, n
INTEGER i1, j1, k1, l1, m1, n1
INTEGER i2, j2, k2, l2, m2, n2
CALL ef_get_res_subscripts_6d(id, res_lo_ss, res_hi_ss, res_incr)
CALL ef_get_arg_subscripts_6d(id, arg_lo_ss, arg_hi_ss, arg_incr)
CALL ef_get_bad_flags(id, bad_flag, bad_flag_result)
n1 = arg_lo_ss(F_AXIS,ARG1)
n2 = arg_lo_ss(F_AXIS,ARG2)
DO 600 n = res_lo_ss(F_AXIS), res_hi_ss(F_AXIS)
m1 = arg_lo_ss(E_AXIS,ARG1)
m2 = arg_lo_ss(E_AXIS,ARG2)
DO 500 m = res_lo_ss(E_AXIS), res_hi_ss(E_AXIS)
l1 = arg_lo_ss(T_AXIS,ARG1)
l2 = arg_lo_ss(T_AXIS,ARG2)
DO 400 l = res_lo_ss(T_AXIS), res_hi_ss(T_AXIS)
k1 = arg_lo_ss(Z_AXIS,ARG1)
k2 = arg_lo_ss(Z_AXIS,ARG2)
DO 300 k = res_lo_ss(Z_AXIS), res_hi_ss(Z_AXIS)
j1 = arg_lo_ss(Y_AXIS,ARG1)
j2 = arg_lo_ss(Y_AXIS,ARG2)
DO 200 j = res_lo_ss(Y_AXIS), res_hi_ss(Y_AXIS)
i1 = arg_lo_ss(X_AXIS,ARG1)
i2 = arg_lo_ss(X_AXIS,ARG2)
DO 100 i = res_lo_ss(X_AXIS), res_hi_ss(X_AXIS)
IF ( (arg_1(i1,j1,k1,l1,m1,n2) .EQ. bad_flag(ARG1)) .OR.
. (arg_2(i2,j2,k2,l2,m2,n2) .EQ. bad_flag(ARG2)) ) THEN
result(i,j,k,l,m,n) = bad_flag_result
ELSE
result(i,j,k,l,m,n) = arg_1(i1,j1,k1,l1,m1,n1) -
. arg_2(i2,j2,k2,l2,m2,n2)
ENDIF
i1 = i1 + arg_incr(X_AXIS,ARG1)
i2 = i2 + arg_incr(X_AXIS,ARG2)
100 CONTINUE
j1 = j1 + arg_incr(Y_AXIS,ARG1)
j2 = j2 + arg_incr(Y_AXIS,ARG2)
200 CONTINUE
k1 = k1 + arg_incr(Z_AXIS,ARG1)
k2 = k2 + arg_incr(Z_AXIS,ARG2)
300 CONTINUE
l1 = l1 + arg_incr(T_AXIS,ARG1)
l2 = l2 + arg_incr(T_AXIS,ARG2)
400 CONTINUE
m1 = m1 + arg_incr(E_AXIS,ARG1)
m2 = m2 + arg_incr(E_AXIS,ARG2)
500 CONTINUE
n1 = n1 + arg_incr(F_AXIS,ARG1)
n2 = n2 + arg_incr(F_AXIS,ARG2)
600 CONTINUE
* ^
* |
* USER CONFIGURABLE PORTION |
* **********************************************************************
RETURN
END
|
