lapacke_sstev.c

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* Contents: Native high-level C interface to LAPACK function sstev
* Author: Intel Corporation
* Generated June 2017
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_sstev( int matrix_layout, char jobz, lapack_int n, float* d,
                          float* e, float* z, lapack_int ldz )
{
    lapack_int info = 0;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_sstev", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_s_nancheck( n, d, 1 ) ) {
            return -4;
        }
        if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
            return -5;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    if( LAPACKE_lsame( jobz, 'v' ) ) {
        work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,2*n-2) );
        if( work == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    /* Call middle-level interface */
    info = LAPACKE_sstev_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_sstev", info );
    }
    return info;
}