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.
To better understand configuration of the precision of transforms, refer to these examples in your directory:
Intel® oneAPI Math Kernel Library
./examples/dftc/source/basic_sp_complex_dft_1d.c
./examples/dftc/source/basic_dp_complex_dft_1d.c