This appendix presents CBLAS, the C interface to the Basic Linear Algebra Subprograms (BLAS) implemented in Intel® MKL.
Similar to BLAS, the CBLAS interface includes the following levels of functions:
“Level 1 CBLAS” (vector-vector operations)
“Level 2 CBLAS” (matrix-vector operations)
“Level 3 CBLAS” (matrix-matrix operations).
“Sparse CBLAS” (operations on sparse vectors).
To obtain the C interface, the Fortran routine names are prefixed with cblas_ (for example, dasum becomes cblas_dasum). Names of all CBLAS functions are in lowercase letters.
Complex functions ?dotc and ?dotu become CBLAS subroutines (void functions); they return the complex result via a void pointer, added as the last parameter. CBLAS names of these functions are suffixed with _sub. For example, the BLAS function cdotc corresponds to cblas_cdotc_sub.
Warning
Users of the CBLAS interface should be aware that the CBLAS are just a C interface to the BLAS, which is based on the FORTRAN standard and subject to the FORTRAN standard restrictions. In particular, the output parameters should not be referenced through more than one argument.
In the descriptions of CBLAS interfaces, links provided for each function group lead to the descriptions of the respective Fortran-interface BLAS functions.