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/*@@
@file ReductionMin.c
@date Thu Apr 3 11:54:53 1997
@author Thomas Radke, Paul Walker
@desc
Defines the PUGH reduction operator to get the minimum
for a set of arbitrary arrays.
@enddesc
@version $Id$
@@*/
#include <stdlib.h>
#include <string.h>
#include <float.h>
#include "local_reductions.h"
static const char *rcsid = "$Id$";
CCTK_FILEVERSION(CCTDevelopment_LocalReduce_ReductionMin_c);
/* local function prototypes */
static int ReductionMinVal (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*/]);
/*@@
@routine PUGH_ReductionMinValArrays
@author Thomas Radke
@date 19 Aug 1999
@desc
@enddesc
@history
@endhistory
@var N_dims
@vdesc number of dimensions in the *reduction*
@vtype int
@vio in
@endvar
@var operator_handle
@vdesc operator handle specificies the type of reduction we will perform
@vtype int
@vio in
@endvar
@var param_table_handle
@vdesc handle to "parameter table", a key-value table
@vtype int
@vio in
@endvar
@var N_input_arrays
@vdesc number of input arrays
@vtype int
@vio in
@endvar
@var input_array_dims
@vdesc array of input array dimensions (common to all input arrays)
@vtype const CCTK_INT
@vio in
@endvar
@var input_array_type_codes
@vdesc array of CCTK_VARIABLE_* codes giving data types of input arrays
@vtype const CCTK_INT
@vio in
@endvar
@var input_arrays
@vdesc array of pointers to input arrays
@vtype const void *const
@vio in
@endvar
@var M_output_numbers
@vdesc
@vtype int
@vio in
@endvar
@var output_number_type_codes
@vdesc array of CCTK_VARIABLE_* codes giving data types of output numbers
@vtype const CCTK_INT
@vio in
@endvar
@var output_numbers
@vdesc array[M_output_numbers] of pointers to output numbers[M_reduce_numbers]
@vtype void *const
@vio in
@endvar
@@*/
int ReductionMinValArrays (int N_dims, int operator_handle,
int param_table_handle, int N_input_arrays,
const CCTK_INT input_array_dims[],
const CCTK_INT input_array_type_codes[],
const void *const input_arrays[],
int M_output_numbers,
const CCTK_INT output_number_type_codes[],
void *const output_numbers[])
{
return (ReductionArrays (N_dims, operator_handle,
param_table_handle, N_input_arrays,
input_array_dims, input_array_type_codes,
input_arrays, M_output_numbers,
output_number_type_codes, output_numbers,
ReductionMinVal));
}
/*****************************************************************************/
/* local functions */
/*****************************************************************************/
/*@@
@routine ReductionMinVal
@date Aug 19 1999
@author Thomas Radke
@desc Returns the minimum for a set of distributed array with
'num_points' elements each.
Global reduction is done element-wise (num_outvals == 1)
or on the results of the local reductions.
@enddesc
@@*/
static int ReductionMinVal (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;
/* prevent compiler warnings about unused parameters */
(void) (num_points + 0);
/* macros to complete the ITERATE_ARRAY macro */
#define INITIAL_REDUCTION_VALUE(array) ((array)[0])
#define REDUCTION_OPERATION(min, scalar) if (min > scalar) min = 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, "LocalReductionMinVal: Don't know how to compute "
"the minimum of complex variables !!!");
}
else
{
CCTK_WARN (1, "LocalReductionMinVal: Unknown variable type");
}
return (-1);
}
}
return (0);
}
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