lapacke_dsbtrd.c

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* Contents: Native high-level C interface to LAPACK function dsbtrd
* Author: Intel Corporation
* Generated June 2016
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_dsbtrd( int matrix_layout, char vect, char uplo, lapack_int n,
                           lapack_int kd, double* ab, lapack_int ldab,
                           double* d, double* e, double* q, lapack_int ldq )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dsbtrd", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
        return -6;
    }
    if( LAPACKE_lsame( vect, 'u' ) ) {
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
            return -10;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dsbtrd_work( matrix_layout, vect, uplo, n, kd, ab, ldab, d, e,
                                q, ldq, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dsbtrd", info );
    }
    return info;
}