Computes D = Alpha*A*B+ Beta*C for a real matrix.
D = linalg_dgemm ( Alpha , A , B , Beta , C)
a 1-by-1 matrix of doubles
a m-by-n matrix of doubles
a n-by-p matrix of doubles
a 1-by-1 matrix of doubles
a m-by-p matrix of doubles
a m-by-p matrix of doubles
Calls BLAS/DGEMM.