lapacke_dgtrfs.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dgtrfs (int matrix_layout, char trans, lapack_int n, lapack_int nrhs, const double *dl, const double *d, const double *du, const double *dlf, const double *df, const double *duf, const double *du2, const lapack_int *ipiv, const double *b, lapack_int ldb, double *x, lapack_int ldx, double *ferr, double *berr)

Function Documentation

LAPACKE_dgtrfs()

lapack_int LAPACKE_dgtrfs	(	int	matrix_layout,
		char	trans,
		lapack_int	n,
		lapack_int	nrhs,
		const double *	dl,
		const double *	d,
		const double *	du,
		const double *	dlf,
		const double *	df,
		const double *	duf,
		const double *	du2,
		const lapack_int *	ipiv,
		const double *	b,
		lapack_int	ldb,
		double *	x,
		lapack_int	ldx,
		double *	ferr,
		double *	berr )

Definition at line 35 of file lapacke_dgtrfs.c.

{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgtrfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -13;
        }
        if( LAPACKE_d_nancheck( n, d, 1 ) ) {
            return -6;
        }
        if( LAPACKE_d_nancheck( n, df, 1 ) ) {
            return -9;
        }
        if( LAPACKE_d_nancheck( n-1, dl, 1 ) ) {
            return -5;
        }
        if( LAPACKE_d_nancheck( n-1, dlf, 1 ) ) {
            return -8;
        }
        if( LAPACKE_d_nancheck( n-1, du, 1 ) ) {
            return -7;
        }
        if( LAPACKE_d_nancheck( n-2, du2, 1 ) ) {
            return -11;
        }
        if( LAPACKE_d_nancheck( n-1, duf, 1 ) ) {
            return -10;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
            return -15;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgtrfs_work( matrix_layout, trans, n, nrhs, dl, d, du, dlf,
                                df, duf, du2, ipiv, b, ldb, x, ldx, ferr, berr,
                                work, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dgtrfs", info );
    }
    return info;
}