PLASMA  2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
int CORE_dgetf2_nopiv ( int  M,
int  N,
double *  A,
int  LDA 
)

CORE_dgetf2_nopiv computes an LU factorization of a general diagonal dominant M-by-N matrix A witout no pivoting and no blocking. It is the internal function called by CORE_dgetrf_nopiv().

The factorization has the form A = L * U where L is lower triangular with unit diagonal elements (lower trapezoidal if m > n), and U is upper triangular (upper trapezoidal if m < n).

This is the right-looking Level 3 BLAS version of the algorithm.

Parameters
[in]MThe number of rows of the matrix A. M >= 0.
[in]NThe number of columns of the matrix A. N >= 0.
[in,out]AOn entry, the M-by-N matrix to be factored. On exit, the factors L and U from the factorization A = P*L*U; the unit diagonal elements of L are not stored.
[in]LDAThe leading dimension of the array A. LDA >= max(1,M).
Returns
Return values
PLASMA_SUCCESSsuccessful exit
<0if INFO = -k, the k-th argument had an illegal value
>0if INFO = k, U(k,k) is exactly zero. The factorization has been completed, but the factor U is exactly singular, and division by zero will occur if it is used to solve a system of equations.