lapacke_zbbcsd_work.c

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

#include "lapacke_utils.h"

lapack_int LAPACKE_zbbcsd_work( int matrix_layout, char jobu1, char jobu2,
                                char jobv1t, char jobv2t, char trans,
                                lapack_int m, lapack_int p, lapack_int q,
                                double* theta, double* phi,
                                lapack_complex_double* u1, lapack_int ldu1,
                                lapack_complex_double* u2, lapack_int ldu2,
                                lapack_complex_double* v1t, lapack_int ldv1t,
                                lapack_complex_double* v2t, lapack_int ldv2t,
                                double* b11d, double* b11e, double* b12d,
                                double* b12e, double* b21d, double* b21e,
                                double* b22d, double* b22e, double* rwork,
                                lapack_int lrwork )
{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_zbbcsd( &jobu1, &jobu2, &jobv1t, &jobv2t, &trans, &m, &p, &q,
                       theta, phi, u1, &ldu1, u2, &ldu2, v1t, &ldv1t, v2t,
                       &ldv2t, b11d, b11e, b12d, b12e, b21d, b21e, b22d, b22e,
                       rwork, &lrwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int nrows_u1 = ( LAPACKE_lsame( jobu1, 'y' ) ? p : 1);
        lapack_int nrows_u2 = ( LAPACKE_lsame( jobu2, 'y' ) ? m-p : 1);
        lapack_int nrows_v1t = ( LAPACKE_lsame( jobv1t, 'y' ) ? q : 1);
        lapack_int nrows_v2t = ( LAPACKE_lsame( jobv2t, 'y' ) ? m-q : 1);
        lapack_int ldu1_t = MAX(1,nrows_u1);
        lapack_int ldu2_t = MAX(1,nrows_u2);
        lapack_int ldv1t_t = MAX(1,nrows_v1t);
        lapack_int ldv2t_t = MAX(1,nrows_v2t);
        lapack_complex_double* u1_t = NULL;
        lapack_complex_double* u2_t = NULL;
        lapack_complex_double* v1t_t = NULL;
        lapack_complex_double* v2t_t = NULL;
        /* Check leading dimension(s) */
        if( ldu1 < p ) {
            info = -13;
            LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
            return info;
        }
        if( ldu2 < m-p ) {
            info = -15;
            LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
            return info;
        }
        if( ldv1t < q ) {
            info = -17;
            LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
            return info;
        }
        if( ldv2t < m-q ) {
            info = -19;
            LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
            return info;
        }
        /* Query optimal working array(s) size if requested */
        if( lrwork == -1 ) {
            LAPACK_zbbcsd( &jobu1, &jobu2, &jobv1t, &jobv2t, &trans, &m, &p, &q,
                           theta, phi, u1, &ldu1_t, u2, &ldu2_t, v1t, &ldv1t_t,
                           v2t, &ldv2t_t, b11d, b11e, b12d, b12e, b21d, b21e,
                           b22d, b22e, rwork, &lrwork, &info );
            return (info < 0) ? (info - 1) : info;
        }
        /* Allocate memory for temporary array(s) */
        if( LAPACKE_lsame( jobu1, 'y' ) ) {
            u1_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                ldu1_t * MAX(1,p) );
            if( u1_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_0;
            }
        }
        if( LAPACKE_lsame( jobu2, 'y' ) ) {
            u2_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                ldu2_t * MAX(1,m-p) );
            if( u2_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        if( LAPACKE_lsame( jobv1t, 'y' ) ) {
            v1t_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                ldv1t_t * MAX(1,q) );
            if( v1t_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_2;
            }
        }
        if( LAPACKE_lsame( jobv2t, 'y' ) ) {
            v2t_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                ldv2t_t * MAX(1,m-q) );
            if( v2t_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_3;
            }
        }
        /* Transpose input matrices */
        if( LAPACKE_lsame( jobu1, 'y' ) ) {
            LAPACKE_zge_trans( matrix_layout, nrows_u1, p, u1, ldu1, u1_t,
                               ldu1_t );
        }
        if( LAPACKE_lsame( jobu2, 'y' ) ) {
            LAPACKE_zge_trans( matrix_layout, nrows_u2, m-p, u2, ldu2, u2_t,
                               ldu2_t );
        }
        if( LAPACKE_lsame( jobv1t, 'y' ) ) {
            LAPACKE_zge_trans( matrix_layout, nrows_v1t, q, v1t, ldv1t, v1t_t,
                               ldv1t_t );
        }
        if( LAPACKE_lsame( jobv2t, 'y' ) ) {
            LAPACKE_zge_trans( matrix_layout, nrows_v2t, m-q, v2t, ldv2t, v2t_t,
                               ldv2t_t );
        }
        /* Call LAPACK function and adjust info */
        LAPACK_zbbcsd( &jobu1, &jobu2, &jobv1t, &jobv2t, &trans, &m, &p, &q,
                       theta, phi, u1_t, &ldu1_t, u2_t, &ldu2_t, v1t_t,
                       &ldv1t_t, v2t_t, &ldv2t_t, b11d, b11e, b12d, b12e, b21d,
                       b21e, b22d, b22e, rwork, &lrwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        if( LAPACKE_lsame( jobu1, 'y' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_u1, p, u1_t, ldu1_t, u1,
                               ldu1 );
        }
        if( LAPACKE_lsame( jobu2, 'y' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_u2, m-p, u2_t, ldu2_t,
                               u2, ldu2 );
        }
        if( LAPACKE_lsame( jobv1t, 'y' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_v1t, q, v1t_t, ldv1t_t,
                               v1t, ldv1t );
        }
        if( LAPACKE_lsame( jobv2t, 'y' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_v2t, m-q, v2t_t, ldv2t_t,
                               v2t, ldv2t );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( jobv2t, 'y' ) ) {
            LAPACKE_free( v2t_t );
        }
exit_level_3:
        if( LAPACKE_lsame( jobv1t, 'y' ) ) {
            LAPACKE_free( v1t_t );
        }
exit_level_2:
        if( LAPACKE_lsame( jobu2, 'y' ) ) {
            LAPACKE_free( u2_t );
        }
exit_level_1:
        if( LAPACKE_lsame( jobu1, 'y' ) ) {
            LAPACKE_free( u1_t );
        }
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_zbbcsd_work", info );
    }
    return info;
}