Some Intel® IPP functions contain OpenMP* code, which give significant performance gain on multi-processor and multi-core systems. With each version of Intel IPP, we offer updated threaded API lists. These functions include color conversion, filtering, convolution, cryptography, cross correlation, matrix computation, square distance, and bit reduction, etc.

Since version 5.3 and later, you can find the threaded API list "ThreadedFunctionsList.txt" under the standalone IPP product  [IPP InstallDir]\doc directory after completing Intel IPP installation.
Or if Intel® C/C++ compiler profession version which inlcudes Intel IPP,  it is located in [Compiler INstallDir]\Documentation\ipp\
Of if Intel® Parallel Studio which includes Intel IPP , it is located in [Parallel Studio INstallDir]\Parallel Studio\Composer\Documentation\en_US\ipp\

To find the detailed threaded API list prior to v5.3, please download the file from each version:

For more topics related to Intel IPP threading and OpenMP support: http://software.intel.com/en-us/articles/intel-integrated-performance-primitives-intel-ipp-threading-openmp-faq