SetInternalPrecision

Changes the value of the parameter internal_precision in the convolution or correlation task descriptor.

Syntax

Fortran:

status = vslconvsetinternalprecision(task, precision)

status = vslcorrsetinternalprecision(task, precision)

status = vslConvSetInternalPrecision(task, precision);

status = vslCorrSetInternalPrecision(task, precision);

Include Files

The FORTRAN 77 interfaces are specified in the mkl_vsl.f77 include file, the Fortran 90 interfaces are specified in the mkl_vsl.f90 include file, and the C interfaces are specified in the mkl_vsl_functions.h include file.

Input Parameters

Name	Type	Description
task	FORTRAN 77: INTEGER4 task(2) for vslconvsetinternalprecision INTEGER4 task(2) for vslcorrsetinternalprecision Fortran 90: TYPE(VSL_CONV_TASK) for vslconvsetinternalprecision TYPE(VSL_CORR_TASK) for vslcorrsetinternalprecision C: VSLConvTaskPtr for vslConvSetInternalPrecision VSLCorrTaskPtr for vslCorrSetInternalPrecision	Pointer to the task descriptor.
precision	FORTRAN 77: INTEGER Fortran 90: INTEGER C: const int	New value of the parameter internal_precision.

Name

Type

Description

task

FORTRAN 77: INTEGER*4 task(2) for vslconvsetinternalprecision

INTEGER*4 task(2) for vslcorrsetinternalprecision

Fortran 90: TYPE(VSL_CONV_TASK) for vslconvsetinternalprecision

TYPE(VSL_CORR_TASK) for vslcorrsetinternalprecision

C: VSLConvTaskPtr for vslConvSetInternalPrecision

VSLCorrTaskPtr for vslCorrSetInternalPrecision

Pointer to the task descriptor.

precision

FORTRAN 77: INTEGER

Fortran 90: INTEGER

C: const int

New value of the parameter internal_precision.

Output Parameters

Name	Type	Description
status	FORTRAN 77: INTEGER Fortran 90: INTEGER C: int	Current status of the task.

Name

Type

Description

status

FORTRAN 77: INTEGER

Fortran 90: INTEGER

C: int

Current status of the task.

Description

The SetInternalPrecision routine changes the value of the parameter internal_precision for the operation of convolution or correlation. This parameter defines whether the internal computations of the convolution or correlation result should be done in single or double precision. Initial value for internal_precision is assigned by a task constructor and set to either "single" or "double" according to the particular flavor of the constructor used.

Changing the internal_precision can be useful if the default setting of this parameter was "single" but you want to calculate the result with double precision even if input and output data are represented in single precision.

Predefined values for the internal_precision input parameter are as follows:

Values of internal_precision Parameter
Value	Purpose
VSL_CONV_PRECISION_SINGLE	Compute convolution with single precision.
VSL_CORR_PRECISION_SINGLE	Compute correlation with single precision.
VSL_CONV_PRECISION_DOUBLE	Compute convolution with double precision.
VSL_CORR_PRECISION_DOUBLE	Compute correlation with double precision.