BLAS

BLAS (Basic Linear Algebra Subroutines)

The presentation by Christoph/Stef is here and the code can be found here. Paths for CBLAS and BLITZ++ can be found in the Makefile.

BLAS is a standard for implementing highly efficient vector/matrix operations. A quick reference guide can be found here.

There are three levels of definition in BLAS:

Level 1 - Vector-Vector operations
Level 2 - Vector-Matrix operations. (Reference)
Level 3 - Matrix-Matrix operations. (Reference)

Various implementations of BLAS:

1. ATLAS (Automatically Tuned Linear Algebra Software)

homepage
Provides C and FORTRAN77 interfaces to a portably efficient BLAS implementation and a few of the LAPACK routines.
C BLAS API
F77 BLAS API
C and F77 LAPACK API

2. MKL (Intel Math Kernel Library)

homepage
Functionalities (BLAS, LAPACK, Sparse Solvers, FFTs)
A really long documentation

3. CBLAS (C-interface to BLAS)

Documentation on CBLAS

4. BLITZ++

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