Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

df?SearchCells1D/df?SearchCellsEx1D

Searches sub-intervals containing interpolation sites.

Syntax

status
=
dfsSearchCells1D
(
task
,
method
,
nsite
,
site
,
sitehint
,
datahint
,
cell
)
status
=
dfdSearchCells1D
(
task
,
method
,
nsite
,
site
,
sitehint
,
datahint
,
cell
)
status
=
dfsSearchCellsEx1D
(
task
,
method
,
nsite
,
site
,
sitehint
,
datahint
,
cell
,
search_cb
,
search_params
)
status
=
dfdSearchCellsEx1D
(
task
,
method
,
nsite
,
site
,
sitehint
,
datahint
,
cell
,
search_cb
,
search_params
)
Include Files
  • mkl.h
Input Parameters
Name
Type
Description
task
DFTaskPtr
Descriptor of the task.
method
const MKL_INT
Search method. The supported value is
DF_METHOD_STD
.
nsite
const MKL_INT*
Number of interpolation sites.
site
const float*
 for
dfsSearchCells1D
/
dfsSearchCellsEx1D
const double*
 for
dfdSearchCells1D
/
dfdSearchCellsEx1D
Array of interpolation sites of size
nsite
. The structure of the array is defined by the
sitehint
 parameter:
  • If the sites form a non-uniform partition, the array should contain
    nsite
     values.
  • If the sites form a uniform partition, the array should contain two entries that represent the left-most and the right-most interpolation sites. The first entry of the array contains the left-most interpolation point. The second entry of the array contains the right-most interpolation point.
sitehint
const MKL_INT
A flag describing the structure of the interpolation sites.
For the list of possible values of
sitehint
, see table
"Hint Values for Interpolation Sites"
.
If you set the flag to
DF_NO_HINT
, the library interprets the site-defined partition as non-uniform.
datahint
const float*
 for
dfsSearchCells1D
/
dfsSearchCellsEx1D
const double*
 for
dfdSearchCells1D
/
dfdSearchCellsEx1D
Array that contains additional information about the structure of the partition and interpolation sites. This data helps to speed up the computation. If you provide a
NULL
 pointer, the routine uses the default settings for computations.
For details on the
datahint
 array, see table
"Structure of the
datahint
 Array"
.
search_cb
const
dfsSearchCellsCallBack
 for
dfsSearchCellsEx1D
const
dfdSearchCellsCallBack
 for
dfdSearchCellsEx1D
User-defined callback function for computing indices of cells that can contain interpolation sites.
Set to
NULL
 if you are not supplying a callback function.
search_params
const void*
Pointer to additional user-defined parameters passed by the library to the
search_cb
 function.
Set to
NULL
 if there are no additional parameters or if you are not supplying a callback function.
Output Parameters
Name
Type
Description
status
int
Status of the routine:
  • DF_STATUS_OK
     if the routine execution completed successfully.
  • Non-zero error code if the routine execution failed.
    See "Task Status and Error Reporting" for error code definitions.
cell
MKL_INT*
Array of cell indices in the partition that contain the interpolation sites.
Description
The
df?SearchCells1D
/
df?SearchCellsEx1D
 routines return array
cell
 of indices of sub-intervals (cells) in the partition that contain interpolation sites available in array
site
. For details on the cell indexing scheme, see the description of the
df?Interpolate1D
/
df?InterpolateEx1D
 computation routines.
Use the
datahint
 parameter to provide additional information about the structure of the partition and/or interpolation sites. The definition of the
datahint
 parameter is availalbe in the description of the
df?Interpolate1D
/
df?InterpolateEx1D
 computation routines.
For description of the user-defined callback for computation of cell indices, see
df?SearchCellsCallBack
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.