lapacke_dtgevc.c

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* Contents: Native high-level C interface to LAPACK function dtgevc
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dtgevc( int matrix_layout, char side, char howmny,
                           const lapack_logical* select, lapack_int n,
                           const double* s, lapack_int lds, const double* p,
                           lapack_int ldp, double* vl, lapack_int ldvl,
                           double* vr, lapack_int ldvr, lapack_int mm,
                           lapack_int* m )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dtgevc", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, p, ldp ) ) {
            return -8;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, s, lds ) ) {
            return -6;
        }
        if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vl, ldvl ) ) {
                return -10;
            }
        }
        if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vr, ldvr ) ) {
                return -12;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,6*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dtgevc_work( matrix_layout, side, howmny, select, n, s, lds,
                                p, ldp, vl, ldvl, vr, ldvr, mm, m, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dtgevc", info );
    }
    return info;
}