oneMKL Vector Mathematics functions (VM) compute a mathematical function of each of the vector elements. VM includes a set of highly optimized functions (arithmetic, power, trigonometric, exponential, hyperbolic, special, and rounding) that operate on vectors of real and complex numbers.
Application programs that improve performance with VM include nonlinear programming software, computation of integrals, financial calculations, computer graphics, and many others.
VM functions fall into the following groups according to the operations they perform:

VM Mathematical Functions compute values of mathematical functions, such as sine, cosine, exponential, or logarithm, on vectors stored contiguously in memory.

VM Pack/Unpack Functions convert to and from vectors with positive increment indexing, vector indexing, and mask indexing (see Appendix "Vector Arguments in VM" for details on vector indexing methods).

VM Service Functions set/get the accuracy modes and the error codes, and free memory.
The VM mathematical functions take an input vector as an argument, compute values of the respective function elementwise, and return the results in an output vector. All the VM mathematical functions can perform inplace operations, where the input and output arrays are at the same memory locations.
The oneMKL interfaces are given inmkl_vml_functions.h.
Examples that demonstrate how to use the VM functions are located in:
${MKL}/examples/vmlc/source
See VM performance and accuracy data in the online VM Performance and Accuracy Data document available at http://software.intel.com/enus/articles/intelmathkernellibrarydocumentation/
Optimization Notice 

Intel's compilers may or may not optimize to the same degree for nonIntel 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. Microprocessordependent 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 