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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
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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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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 high-level C interface to LAPACK function dsbgvd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dsbgvd( int matrix_order, char jobz, char uplo, lapack_int n,
00038                            lapack_int ka, lapack_int kb, double* ab,
00039                            lapack_int ldab, double* bb, lapack_int ldbb,
00040                            double* w, double* z, lapack_int ldz )
00041 {
00042     lapack_int info = 0;
00043     lapack_int liwork = -1;
00044     lapack_int lwork = -1;
00045     lapack_int* iwork = NULL;
00046     double* work = NULL;
00047     lapack_int iwork_query;
00048     double work_query;
00049     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00050         LAPACKE_xerbla( "LAPACKE_dsbgvd", -1 );
00051         return -1;
00052     }
00053 #ifndef LAPACK_DISABLE_NAN_CHECK
00054     /* Optionally check input matrices for NaNs */
00055     if( LAPACKE_dsb_nancheck( matrix_order, uplo, n, ka, ab, ldab ) ) {
00056         return -7;
00057     }
00058     if( LAPACKE_dsb_nancheck( matrix_order, uplo, n, kb, bb, ldbb ) ) {
00059         return -9;
00060     }
00061 #endif
00062     /* Query optimal working array(s) size */
00063     info = LAPACKE_dsbgvd_work( matrix_order, jobz, uplo, n, ka, kb, ab, ldab,
00064                                 bb, ldbb, w, z, ldz, &work_query, lwork,
00065                                 &iwork_query, liwork );
00066     if( info != 0 ) {
00067         goto exit_level_0;
00068     }
00069     liwork = (lapack_int)iwork_query;
00070     lwork = (lapack_int)work_query;
00071     /* Allocate memory for work arrays */
00072     iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
00073     if( iwork == NULL ) {
00074         info = LAPACK_WORK_MEMORY_ERROR;
00075         goto exit_level_0;
00076     }
00077     work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
00078     if( work == NULL ) {
00079         info = LAPACK_WORK_MEMORY_ERROR;
00080         goto exit_level_1;
00081     }
00082     /* Call middle-level interface */
00083     info = LAPACKE_dsbgvd_work( matrix_order, jobz, uplo, n, ka, kb, ab, ldab,
00084                                 bb, ldbb, w, z, ldz, work, lwork, iwork,
00085                                 liwork );
00086     /* Release memory and exit */
00087     LAPACKE_free( work );
00088 exit_level_1:
00089     LAPACKE_free( iwork );
00090 exit_level_0:
00091     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00092         LAPACKE_xerbla( "LAPACKE_dsbgvd", info );
00093     }
00094     return info;
00095 }