OpenBLAS/lapack-netlib/LAPACKE/src/lapacke_strsen.c

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* Contents: Native high-level C interface to LAPACK function strsen
* Author: Intel Corporation
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_strsen( int matrix_layout, char job, char compq,
                           const lapack_logical* select, lapack_int n, float* t,
                           lapack_int ldt, float* q, lapack_int ldq, float* wr,
                           float* wi, lapack_int* m, float* s, float* sep )
{
    lapack_int info = 0;
    lapack_int liwork = -1;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    float* work = NULL;
    lapack_int iwork_query;
    float work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_strsen", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_lsame( compq, 'v' ) ) {
            if( LAPACKE_sge_nancheck( matrix_layout, n, n, q, ldq ) ) {
                return -8;
            }
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, n, t, ldt ) ) {
            return -6;
        }
    }
#endif
    /* Query optimal working array(s) size */
    info = LAPACKE_strsen_work( matrix_layout, job, compq, select, n, t, ldt, q,
                                ldq, wr, wi, m, s, sep, &work_query, lwork,
                                &iwork_query, liwork );
    if( info != 0 ) {
        goto exit_level_0;
    }
    liwork = iwork_query;
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
        if( iwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    } else {
        iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) );
        if( iwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }

    work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_strsen_work( matrix_layout, job, compq, select, n, t, ldt, q,
                                ldq, wr, wi, m, s, sep, work, lwork, iwork,
                                liwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
        LAPACKE_free( iwork );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_strsen", info );
    }
    return info;
}