LAPACKE_dggevx()

lapack_int LAPACKE_dggevx	(	int	matrix_layout,
		char	balanc,
		char	jobvl,
		char	jobvr,
		char	sense,
		lapack_int	n,
		double *	a,
		lapack_int	lda,
		double *	b,
		lapack_int	ldb,
		double *	alphar,
		double *	alphai,
		double *	beta,
		double *	vl,
		lapack_int	ldvl,
		double *	vr,
		lapack_int	ldvr,
		lapack_int *	ilo,
		lapack_int *	ihi,
		double *	lscale,
		double *	rscale,
		double *	abnrm,
		double *	bbnrm,
		double *	rconde,
		double *	rcondv
	)

Definition at line 35 of file lapacke_dggevx.c.

{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_logical* bwork = NULL;
    lapack_int* iwork = NULL;
    double* work = NULL;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dggevx", -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, a, lda ) ) {
            return -7;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
            return -9;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'e' ) ||
        LAPACKE_lsame( sense, 'v' ) ) {
        bwork = (lapack_logical*)
            LAPACKE_malloc( sizeof(lapack_logical) * MAX(1,n) );
        if( bwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'n' ) ||
        LAPACKE_lsame( sense, 'v' ) ) {
        iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n+6) );
        if( iwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_1;
        }
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_dggevx_work( matrix_layout, balanc, jobvl, jobvr, sense, n, a,
                                lda, b, ldb, alphar, alphai, beta, vl, ldvl, vr,
                                ldvr, ilo, ihi, lscale, rscale, abnrm, bbnrm,
                                rconde, rcondv, &work_query, lwork, iwork,
                                bwork );
    if( info != 0 ) {
        goto exit_level_2;
    }
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_2;
    }
    /* Call middle-level interface */
    info = LAPACKE_dggevx_work( matrix_layout, balanc, jobvl, jobvr, sense, n, a,
                                lda, b, ldb, alphar, alphai, beta, vl, ldvl, vr,
                                ldvr, ilo, ihi, lscale, rscale, abnrm, bbnrm,
                                rconde, rcondv, work, lwork, iwork, bwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_2:
    if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'n' ) ||
        LAPACKE_lsame( sense, 'v' ) ) {
        LAPACKE_free( iwork );
    }
exit_level_1:
    if( LAPACKE_lsame( sense, 'b' ) || LAPACKE_lsame( sense, 'e' ) ||
        LAPACKE_lsame( sense, 'v' ) ) {
        LAPACKE_free( bwork );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dggevx", info );
    }
    return info;
}

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