lapacke_zungbr_work.c
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00001 /*****************************************************************************
00002   Copyright (c) 2010, Intel Corp.
00003   All rights reserved.
00004 
00005   Redistribution and use in source and binary forms, with or without
00006   modification, are permitted provided that the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice,
00009       this list of conditions and the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright
00011       notice, this list of conditions and the following disclaimer in the
00012       documentation and/or other materials provided with the distribution.
00013     * Neither the name of Intel Corporation nor the names of its contributors
00014       may be used to endorse or promote products derived from this software
00015       without specific prior written permission.
00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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00025   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027   THE POSSIBILITY OF SUCH DAMAGE.
00028 ******************************************************************************
00029 * Contents: Native middle-level C interface to LAPACK function zungbr
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zungbr_work( int matrix_order, char vect, lapack_int m,
00038                                 lapack_int n, lapack_int k,
00039                                 lapack_complex_double* a, lapack_int lda,
00040                                 const lapack_complex_double* tau,
00041                                 lapack_complex_double* work, lapack_int lwork )
00042 {
00043     lapack_int info = 0;
00044     if( matrix_order == LAPACK_COL_MAJOR ) {
00045         /* Call LAPACK function and adjust info */
00046         LAPACK_zungbr( &vect, &m, &n, &k, a, &lda, tau, work, &lwork, &info );
00047         if( info < 0 ) {
00048             info = info - 1;
00049         }
00050     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00051         lapack_int lda_t = MAX(1,m);
00052         lapack_complex_double* a_t = NULL;
00053         /* Check leading dimension(s) */
00054         if( lda < n ) {
00055             info = -7;
00056             LAPACKE_xerbla( "LAPACKE_zungbr_work", info );
00057             return info;
00058         }
00059         /* Query optimal working array(s) size if requested */
00060         if( lwork == -1 ) {
00061             LAPACK_zungbr( &vect, &m, &n, &k, a, &lda_t, tau, work, &lwork,
00062                            &info );
00063             return (info < 0) ? (info - 1) : info;
00064         }
00065         /* Allocate memory for temporary array(s) */
00066         a_t = (lapack_complex_double*)
00067             LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
00068         if( a_t == NULL ) {
00069             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00070             goto exit_level_0;
00071         }
00072         /* Transpose input matrices */
00073         LAPACKE_zge_trans( matrix_order, m, n, a, lda, a_t, lda_t );
00074         /* Call LAPACK function and adjust info */
00075         LAPACK_zungbr( &vect, &m, &n, &k, a_t, &lda_t, tau, work, &lwork,
00076                        &info );
00077         if( info < 0 ) {
00078             info = info - 1;
00079         }
00080         /* Transpose output matrices */
00081         LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
00082         /* Release memory and exit */
00083         LAPACKE_free( a_t );
00084 exit_level_0:
00085         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00086             LAPACKE_xerbla( "LAPACKE_zungbr_work", info );
00087         }
00088     } else {
00089         info = -1;
00090         LAPACKE_xerbla( "LAPACKE_zungbr_work", info );
00091     }
00092     return info;
00093 }


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