Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 2021.1
  • 12/04/2020
  • 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.
To better understand configuration of the precision of transforms, refer to these examples in your
Intel® oneAPI Math Kernel Library
 directory:
./examples/dftc/source/basic_sp_complex_dft_1d.c
./examples/dftc/source/basic_dp_complex_dft_1d.c

Product and Performance Information

1

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