lapacke_shsein.c

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

#include "lapacke_utils.h"

lapack_int LAPACKE_shsein( int matrix_layout, char job, char eigsrc, char initv,
                           lapack_logical* select, lapack_int n, const float* h,
                           lapack_int ldh, float* wr, const float* wi,
                           float* vl, lapack_int ldvl, float* vr,
                           lapack_int ldvr, lapack_int mm, lapack_int* m,
                           lapack_int* ifaill, lapack_int* ifailr )
{
    lapack_int info = 0;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_shsein", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_sge_nancheck( matrix_layout, n, n, h, ldh ) ) {
        return -7;
    }
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'l' ) ) {
        if( LAPACKE_sge_nancheck( matrix_layout, n, mm, vl, ldvl ) ) {
            return -11;
        }
    }
    if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'r' ) ) {
        if( LAPACKE_sge_nancheck( matrix_layout, n, mm, vr, ldvr ) ) {
            return -13;
        }
    }
    if( LAPACKE_s_nancheck( n, wi, 1 ) ) {
        return -10;
    }
    if( LAPACKE_s_nancheck( n, wr, 1 ) ) {
        return -9;
    }
#endif
    /* Allocate memory for working array(s) */
    work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) * MAX(1,n+2) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_shsein_work( matrix_layout, job, eigsrc, initv, select, n, h,
                                ldh, wr, wi, vl, ldvl, vr, ldvr, mm, m, work,
                                ifaill, ifailr );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_shsein", info );
    }
    return info;
}