lapacke_dhsein_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dhsein_work (int matrix_layout, char job, char eigsrc, char initv, lapack_logical *select, lapack_int n, const double *h, lapack_int ldh, double *wr, const double *wi, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, lapack_int mm, lapack_int *m, double *work, lapack_int *ifaill, lapack_int *ifailr)

Function Documentation

LAPACKE_dhsein_work()

lapack_int LAPACKE_dhsein_work	(	int	matrix_layout,
		char	job,
		char	eigsrc,
		char	initv,
		lapack_logical *	select,
		lapack_int	n,
		const double *	h,
		lapack_int	ldh,
		double *	wr,
		const double *	wi,
		double *	vl,
		lapack_int	ldvl,
		double *	vr,
		lapack_int	ldvr,
		lapack_int	mm,
		lapack_int *	m,
		double *	work,
		lapack_int *	ifaill,
		lapack_int *	ifailr )

Definition at line 35 of file lapacke_dhsein_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dhsein( &job, &eigsrc, &initv, select, &n, h, &ldh, wr, wi, vl,
                       &ldvl, vr, &ldvr, &mm, m, work, ifaill, ifailr, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int ldh_t = MAX(1,n);
        lapack_int ldvl_t = MAX(1,n);
        lapack_int ldvr_t = MAX(1,n);
        double* h_t = NULL;
        double* vl_t = NULL;
        double* vr_t = NULL;
        /* Check leading dimension(s) */
        if( ldh < n ) {
            info = -8;
            LAPACKE_xerbla( "LAPACKE_dhsein_work", info );
            return info;
        }
        if( ldvl < mm ) {
            info = -12;
            LAPACKE_xerbla( "LAPACKE_dhsein_work", info );
            return info;
        }
        if( ldvr < mm ) {
            info = -14;
            LAPACKE_xerbla( "LAPACKE_dhsein_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        h_t = (double*)LAPACKE_malloc( sizeof(double) * ldh_t * MAX(1,n) );
        if( h_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'l' ) ) {
            vl_t = (double*)
                LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
            if( vl_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'r' ) ) {
            vr_t = (double*)
                LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
            if( vr_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_2;
            }
        }
        /* Transpose input matrices */
        LAPACKE_dge_trans( matrix_layout, n, n, h, ldh, h_t, ldh_t );
        if( ( LAPACKE_lsame( job, 'l' ) || LAPACKE_lsame( job, 'b' ) ) &&
            LAPACKE_lsame( initv, 'v' ) ) {
            LAPACKE_dge_trans( matrix_layout, n, mm, vl, ldvl, vl_t, ldvl_t );
        }
        if( ( LAPACKE_lsame( job, 'r' ) || LAPACKE_lsame( job, 'b' ) ) &&
            LAPACKE_lsame( initv, 'v' ) ) {
            LAPACKE_dge_trans( matrix_layout, n, mm, vr, ldvr, vr_t, ldvr_t );
        }
        /* Call LAPACK function and adjust info */
        LAPACK_dhsein( &job, &eigsrc, &initv, select, &n, h_t, &ldh_t, wr, wi,
                       vl_t, &ldvl_t, vr_t, &ldvr_t, &mm, m, work, ifaill,
                       ifailr, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'l' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vl_t, ldvl_t, vl,
                               ldvl );
        }
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'r' ) ) {
            LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vr_t, ldvr_t, vr,
                               ldvr );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'r' ) ) {
            LAPACKE_free( vr_t );
        }
exit_level_2:
        if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'l' ) ) {
            LAPACKE_free( vl_t );
        }
exit_level_1:
        LAPACKE_free( h_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dhsein_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dhsein_work", info );
    }
    return info;
}