Vector Mathematical Functions

Intel® MKL Vector Mathematical Functions Library (VML) computes a mathematical function of each of the vector elements. VML 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 VML include nonlinear programming software, computation of integrals, financial calculations, computer graphics, and many others.

VML functions fall into the following groups according to the operations they perform:

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

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

• VML Service Functions set/get the accuracy modes and the error codes.

The VML mathematical functions take an input vector as an argument, compute values of the respective function element-wise, and return the results in an output vector. All the VML mathematical functions can perform in-place operations, where the input and output arrays are at the same memory locations.

The Intel MKL interfaces are given in the following include files:

• mkl_vml.f77, which declares the FORTRAN 77 interfaces

• mkl_vml.f90, which declares the Fortran 90 interfaces; the mkl_vml.fi include file available in the previous versions of Intel MKL is retained for backward compatibility

• mkl_vml_functions.h, which declares the C interfaces

The following directories provide examples that demonstrate how to use the VML functions:

${MKL}/examples/vmlc/source

${MKL}/examples/vmlf/source

See VML performance and accuracy data in the online VML Performance and Accuracy Data document available at http://software.intel.com/en-us/articles/intel-math-kernel-library-documentation/