lapacke_zggsvd.c

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* Contents: Native high-level C interface to LAPACK function zggsvd
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_zggsvd( int matrix_layout, char jobu, char jobv, char jobq,
                           lapack_int m, lapack_int n, lapack_int p,
                           lapack_int* k, lapack_int* l,
                           lapack_complex_double* a, lapack_int lda,
                           lapack_complex_double* b, lapack_int ldb,
                           double* alpha, double* beta,
                           lapack_complex_double* u, lapack_int ldu,
                           lapack_complex_double* v, lapack_int ldv,
                           lapack_complex_double* q, lapack_int ldq,
                           lapack_int* iwork )
{
    lapack_int info = 0;
    double* rwork = NULL;
    lapack_complex_double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_zggsvd", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -10;
        }
        if( LAPACKE_zge_nancheck( matrix_layout, p, n, b, ldb ) ) {
            return -12;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
    if( rwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (lapack_complex_double*)
        LAPACKE_malloc( sizeof(lapack_complex_double) *
                        MAX(1,MAX3(3*n,m,p)+n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_zggsvd_work( matrix_layout, jobu, jobv, jobq, m, n, p, k, l,
                                a, lda, b, ldb, alpha, beta, u, ldu, v, ldv, q,
                                ldq, work, rwork, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( rwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_zggsvd", info );
    }
    return info;
}