lapacke_dgghd3.c

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* Contents: Native middle-level C interface to LAPACK function dgghd3
* Author: Intel Corporation
* Generated January, 2015
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_dgghd3( int matrix_layout, char compq, char compz,
                           lapack_int n, lapack_int ilo, lapack_int ihi,
                           double* a, lapack_int lda,
                           double* b, lapack_int ldb,
                           double* q, lapack_int ldq,
                           double* z, lapack_int ldz )
{
    lapack_int info = 0;
    lapack_int lwork = -1;
    double* work = NULL;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgghd3", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* 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;
    }
    if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
            return -11;
        }
    }
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, z, ldz ) ) {
            return -13;
        }
    }
#endif
    /* Query optimal working array(s) size */
    info = LAPACKE_dgghd3_work( matrix_layout, compq, compz, n, ilo, ihi,
                                a, lda, b, ldb, q, ldq, z, ldz, &work_query,
                                lwork );
    if( info != 0 ) {
        goto exit_level_0;
    }
    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_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgghd3_work( matrix_layout, compq, compz, n, ilo, ihi,
                                a, lda, b, ldb, q, ldq, z, ldz, work, lwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dgghd3", info );
    }
    return info;
}