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/*@@
@file ReductionAvg.c
@date Thu May 27 14:14:53 2004
@author Ravi Paruchuri
@desc
Defines the reduction operator to get the average
of an arbitrary array.
@enddesc
@version $Id$
@@*/
#include <stdlib.h>
#include <string.h>
static const char *rcsid = "$Id$";
CCTK_FILEVERSION(CactusBase_LocalReduce_ReductionAvg_c)
/* local function prototypes */
static int ReductionAvg (int num_dims,
const int from[/* dim */],
const int to[/* dim */],
int iterator[/* dim */],
const int points_per_dim[/* dim */],
int num_points,
int have_local_points,
int num_inarrays,
const int intypes[/* num_inarrays */],
const void *const inarrays[/* num_inarrays */],
int num_outvals,
void *outvals[/*num_inarrays*num_outvals*/]);
/*@@
@routine LocalReduce_ReductionAvgArrays
@author Ravi Paruchuri
@date May 27 2004
@desc
Registered reduction routine for computing the averages
of a set of arrays.
The arrays are described by their dimensions and variable type.
For the number of output values only 1 is accepted.
Type casting of the result is provided by specifying the
requested output datatype. The intermediate reduction value
is always computed as a CCTK_REAL value internally.
@enddesc
@history
@endhistory
@var GH
@vdesc Pointer to CCTK grid hierarchy
@vtype const cGH *
@vio in
@endvar
@var proc
@vdesc processor that should receive the result of operation
(negative value means all processors receive the result)
@vtype int
@vio in
@endvar
@var nDims
@vdesc number of dimensions of input arrays
@vtype int
@vio in
@endvar
@var dims
@vdesc dimensions of input arrays
@vtype const int *
@vio in
@endvar
@var nArrays
@vdesc number of input arrays
@vtype int
@vio in
@endvar
@var inarrays
@vdesc field of input arrays
@vtype const void *const
@vio in
@endvar
@var inType
@vdesc (common) variable type of input arrays
@vtype int
@vio in
@endvar
@var num_outvals
@vdesc number of values per output array
@vtype int
@vio in
@endvar
@var outvals
@vdesc pointer to buffer holding the output values
@vtype void *
@vio in
@endvar
@var outtype
@vdesc (common) variable type of output arrays
@vtype int
@vio in
@endvar
@@*/
int LocalReduce_ReductionAvgArrays (const cGH *GH,
int proc,
int num_dims,
const int dims[/* num_dims */],
int num_inarrays,
const void *const inarrays[/* num_inarrays */],
int intype,
int num_outvals,
void *outvals[], /* [num_outvals] */,
int outtype)
{
return (LocalReduce_ReductionArrays (num_dims, dims,
intype, num_inarrays, inarrays,
outtype, num_outvals, outvals,
ReductionAvg));
}
/*****************************************************************************/
/* local functions */
/*****************************************************************************/
/*@@
@routine ReductionAvg
@date Aug 19 1999
@author Thomas Radke
@desc Returns the average of a distributed array with
'num_points' elements. Global reduction is done element-wise
(num_outvals == 1) or on the results of the local reductions.
@enddesc
@@*/
static int ReductionAvg (int num_dims,
const int from[/* dim */],
const int to[/* dim */],
int iterator[/* dim */],
const int points_per_dim[/* dim */],
int num_points,
int have_local_points,
int num_inarrays,
const int intypes[/* num_inarrays */],
const void *const inarrays[/* num_inarrays */],
int num_outvals,
CCTK_REAL outvals[/*num_inarrays*num_outvals*/])
{
int i, total_outvals;
const char *vtypename;
const pGH *pughGH;
/* avoid compiler warnings about unused parameters */
(void) (num_points + 0);
/* macros to complete the ITERATE_ARRAY macro */
#define INITIAL_REDUCTION_VALUE(array) 0
#define REDUCTION_OPERATION(avg, scalar) avg += scalar
for (i = total_outvals = 0; i < num_inarrays; i++)
{
switch (intypes[i])
{
case CCTK_VARIABLE_CHAR:
ITERATE_ARRAY (CCTK_BYTE, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_BYTE, outvals, num_outvals, total_outvals);
break;
case CCTK_VARIABLE_INT:
ITERATE_ARRAY (CCTK_INT, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_INT, outvals, num_outvals, total_outvals);
break;
#ifdef CCTK_INT1
case CCTK_VARIABLE_INT1:
ITERATE_ARRAY (CCTK_INT1, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_INT1, outvals, num_outvals, total_outvals);
break;
#endif
#ifdef CCTK_INT2
case CCTK_VARIABLE_INT2:
ITERATE_ARRAY (CCTK_INT2, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_INT2, outvals, num_outvals, total_outvals);
break;
#endif
#ifdef CCTK_INT4
case CCTK_VARIABLE_INT4:
ITERATE_ARRAY (CCTK_INT4, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_INT4, outvals, num_outvals, total_outvals);
break;
#endif
#ifdef CCTK_INT8
case CCTK_VARIABLE_INT8:
ITERATE_ARRAY (CCTK_INT8, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_INT8, outvals, num_outvals, total_outvals);
break;
#endif
case CCTK_VARIABLE_REAL:
ITERATE_ARRAY (CCTK_REAL, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_REAL, outvals, num_outvals, total_outvals);
break;
#ifdef CCTK_REAL4
case CCTK_VARIABLE_REAL4:
ITERATE_ARRAY (CCTK_REAL4, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_REAL4, outvals, num_outvals, total_outvals);
break;
#endif
#ifdef CCTK_REAL8
case CCTK_VARIABLE_REAL8:
ITERATE_ARRAY (CCTK_REAL8, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_REAL8, outvals, num_outvals, total_outvals);
break;
#endif
#ifdef CCTK_REAL16
case CCTK_VARIABLE_REAL16:
ITERATE_ARRAY (CCTK_REAL16, num_dims, inarrays[i],
from, to, iterator, points_per_dim,
CCTK_REAL16, outvals, num_outvals, total_outvals);
break;
#endif
default:
vtypename = CCTK_VarTypeName (intypes[i]);
if (vtypename && strncmp (vtypename, "CCTK_VARIABLE_COMPLEX", 21) == 0)
{
CCTK_WARN (1, "LocalReduce_ReductionAvg: Don't know how to compute "
"the average of complex variables !!!");
}
else
{
CCTK_WARN (1, "LocalReduce_ReductionAvg: Unknown variable type");
}
return (-1);
}
}
for (i = 0; i < total_outvals; i++)
{
outvals[i] /= num_points;
}
return (0);
}
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