lapacke_dgges3.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dgges3 (int matrix_layout, char jobvsl, char jobvsr, char sort, LAPACK_D_SELECT3 selctg, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, lapack_int *sdim, double *alphar, double *alphai, double *beta, double *vsl, lapack_int ldvsl, double *vsr, lapack_int ldvsr)

Function Documentation

LAPACKE_dgges3()

lapack_int LAPACKE_dgges3	(	int	matrix_layout,
		char	jobvsl,
		char	jobvsr,
		char	sort,
		LAPACK_D_SELECT3	selctg,
		lapack_int	n,
		double *	a,
		lapack_int	lda,
		double *	b,
		lapack_int	ldb,
		lapack_int *	sdim,
		double *	alphar,
		double *	alphai,
		double *	beta,
		double *	vsl,
		lapack_int	ldvsl,
		double *	vsr,
		lapack_int	ldvsr )

Definition at line 35 of file lapacke_dgges3.c.

{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_logical* bwork = NULL;
    double* work = NULL;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgges3", -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( sort, 's' ) ) {
        bwork = (lapack_logical*)
            LAPACKE_malloc( sizeof(lapack_logical) * MAX(1,n) );
        if( bwork == NULL ) {
            info = LAPACK_WORK_MEMORY_ERROR;
            goto exit_level_0;
        }
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_dgges3_work( matrix_layout, jobvsl, jobvsr, sort, selctg,
                                n, a, lda, b, ldb, sdim, alphar, alphai, beta,
                                vsl, ldvsl, vsr, ldvsr,
                                &work_query, lwork, bwork );
    if( info != 0 ) {
        goto exit_level_1;
    }
    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_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgges3_work( matrix_layout, jobvsl, jobvsr, sort, selctg,
                                n, a, lda, b, ldb, sdim, alphar, alphai, beta,
                                vsl, ldvsl, vsr, ldvsr, work, lwork, bwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    if( LAPACKE_lsame( sort, 's' ) ) {
        LAPACKE_free( bwork );
    }
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dgges3", info );
    }
    return info;
}