Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

DFTI_PRECISION

The configuration parameter
DFTI_PRECISION
denotes the floating-point precision in which the transform is to be carried out. A setting of
DFTI_SINGLE
stands for single precision, and a setting of
DFTI_DOUBLE
stands for double precision. The data must be presented in this precision, the computation is carried out in this precision, and the result is delivered in this precision.
DFTI_PRECISION
does not have a default value. Set it explicitly by calling the
DftiCreateDescriptor
function.
Fortran module
MKL_DFTI
also defines named constants
DFTI_SINGLE_R
and
DFTI_DOUBLE_R
, with the same semantics as
DFTI_SINGLE
and
DFTI_DOUBLE
, respectively. Do not use these constants to set the
DFTI_PRECISION
configuration parameter. Use them only as described in
DftiCreateDescriptor
.
To better understand configuration of the precision of transforms, refer to these examples in your
Intel® MKL
directory:
./examples/dftf/source/basic_sp_complex_dft_1d.f90
./examples/dftf/source/basic_dp_complex_dft_1d.f90

Product and Performance Information

1

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Notice revision #20110804