Developer Reference

  • 2020
  • 07/15/2020
  • Public Content

Function Context Structures

Some Intel IPP functions use special structures to store function-specific (context) information. For example, the
structure stores twiddle factors and bit reverse indexes needed in computing the fast Fourier transform.
Two different kinds of structures are used: structures that are not modified during function operation - they have the suffix
in their names, and structures that are modified during operation - they have the suffix
in their names.
These context-related structures are not defined in the public headers, and their fields are not accessible. It was done because the function context interpretation is processor dependent. Thus, you may only use context-related functions and may not create a function context as an automatic variable.

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804