lapacke_dggsvd.c

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

#include "lapacke_utils.h"

lapack_int LAPACKE_dggsvd( int matrix_layout, char jobu, char jobv, char jobq,
                           lapack_int m, lapack_int n, lapack_int p,
                           lapack_int* k, lapack_int* l, double* a,
                           lapack_int lda, double* b, lapack_int ldb,
                           double* alpha, double* beta, double* u,
                           lapack_int ldu, double* v, lapack_int ldv, double* q,
                           lapack_int ldq, lapack_int* iwork )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dggsvd", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
        return -10;
    }
    if( LAPACKE_dge_nancheck( matrix_layout, p, n, b, ldb ) ) {
        return -12;
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,MAX3(3*n,m,p)+n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dggsvd_work( matrix_layout, jobu, jobv, jobq, m, n, p, k, l,
                                a, lda, b, ldb, alpha, beta, u, ldu, v, ldv, q,
                                ldq, work, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dggsvd", info );
    }
    return info;
}