lapacke_dstev.c

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* Contents: Native high-level C interface to LAPACK function dstev
* Author: Intel Corporation
* Generated November 2015
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_dstev( int matrix_layout, char jobz, lapack_int n, double* d,
                          double* e, double* z, lapack_int ldz )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dstev", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_d_nancheck( n, d, 1 ) ) {
        return -4;
    }
    if( LAPACKE_d_nancheck( n, e, 1 ) ) {
        return -5;
    }
#endif
    /* Allocate memory for working array(s) */
    if( LAPACKE_lsame( jobz, 'v' ) ) {
        work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n-2) );
        if( work == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    /* Call middle-level interface */
    info = LAPACKE_dstev_work( matrix_layout, jobz, n, d, e, z, ldz, work );
    /* Release memory and exit */
    if( LAPACKE_lsame( jobz, 'v' ) ) {
        LAPACKE_free( work );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dstev", info );
    }
    return info;
}