lapacke_dgeev_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dgeev_work (int matrix_layout, char jobvl, char jobvr, lapack_int n, double *a, lapack_int lda, double *wr, double *wi, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, double *work, lapack_int lwork)

Function Documentation

LAPACKE_dgeev_work()

lapack_int LAPACKE_dgeev_work	(	int	matrix_layout,
		char	jobvl,
		char	jobvr,
		lapack_int	n,
		double *	a,
		lapack_int	lda,
		double *	wr,
		double *	wi,
		double *	vl,
		lapack_int	ldvl,
		double *	vr,
		lapack_int	ldvr,
		double *	work,
		lapack_int	lwork )

Definition at line 35 of file lapacke_dgeev_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dgeev( &jobvl, &jobvr, &n, a, &lda, wr, wi, vl, &ldvl, vr, &ldvr,
                      work, &lwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int lda_t = MAX(1,n);
        lapack_int ldvl_t = MAX(1,n);
        lapack_int ldvr_t = MAX(1,n);
        double* a_t = NULL;
        double* vl_t = NULL;
        double* vr_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -6;
            LAPACKE_xerbla( "LAPACKE_dgeev_work", info );
            return info;
        }
        if( ldvl < n ) {
            info = -10;
            LAPACKE_xerbla( "LAPACKE_dgeev_work", info );
            return info;
        }
        if( ldvr < n ) {
            info = -12;
            LAPACKE_xerbla( "LAPACKE_dgeev_work", info );
            return info;
        }
        /* Query optimal working array(s) size if requested */
        if( lwork == -1 ) {
            LAPACK_dgeev( &jobvl, &jobvr, &n, a, &lda_t, wr, wi, vl, &ldvl_t,
                          vr, &ldvr_t, work, &lwork, &info );
            return (info < 0) ? (info - 1) : info;
        }
        /* Allocate memory for temporary array(s) */
        a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
        if( a_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        if( LAPACKE_lsame( jobvl, 'v' ) ) {
            vl_t = (double*)
                LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,n) );
            if( vl_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        if( LAPACKE_lsame( jobvr, 'v' ) ) {
            vr_t = (double*)
                LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,n) );
            if( vr_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_2;
            }
        }
        /* Transpose input matrices */
        LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
        /* Call LAPACK function and adjust info */
        LAPACK_dgeev( &jobvl, &jobvr, &n, a_t, &lda_t, wr, wi, vl_t, &ldvl_t,
                      vr_t, &ldvr_t, work, &lwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
        if( LAPACKE_lsame( jobvl, 'v' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vl_t, ldvl_t, vl, ldvl );
        }
        if( LAPACKE_lsame( jobvr, 'v' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vr_t, ldvr_t, vr, ldvr );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( jobvr, 'v' ) ) {
            LAPACKE_free( vr_t );
        }
exit_level_2:
        if( LAPACKE_lsame( jobvl, 'v' ) ) {
            LAPACKE_free( vl_t );
        }
exit_level_1:
        LAPACKE_free( a_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dgeev_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dgeev_work", info );
    }
    return info;
}