Limitations of the Direct Call

Directly calling the Intel® oneAPI Math Kernel Library kernels has the following limitations:

• If the MKL_DIRECT_CALL or MKL_DIRECT_CALL_SEQmacro is used, Intel® oneAPI Math Kernel Library may skip error checking.

  Important

  With a limited error checking, you are responsible for checking the correctness of function parameters to avoid unsafe and incorrect code execution.

• The feature is only available for the following functions:

  • BLAS: ?gemm, ?gemm3m, ?syrk, ?trsm, ?axpy, and ?dot

  • LAPACK: ?getrf, ?getrs, ?getri, ?potrf, and ?geqrf. (available for C applications only)

• Intel® oneAPI Math Kernel Library Verbose mode, Conditional Numerical Reproducibility, and BLAS95 interfaces are not supported.

• GNU* Fortran compilers are not supported.

• For C applications, you must enable mixing declarations and user code by providing the -std=c99 option for Intel® compilers.