matmul, a FORTRAN77 code which compares various methods for computing the matrix product
A * B = C.
The code can do this for a variety of matrix sizes, and for different arithmetics (real, complex, double precision, integer, even logical!) There are many algorithms built in, including the simple triple DO loop (actually not so simple; there are 6 ways to set it up), some unrolling techniques, and the level 1 and 2 BLAS routines.
The code is interactive, so the user can easily pursue any line of inquiry that seems promising. New algorithms or locally available methods are not to hard to add.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
matmul is available in a C version and a FORTRAN77 version and a FORTRAN90 version.
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