lapacke_zstein_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
00022   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 zstein
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zstein_work( int matrix_order, lapack_int n, const double* d,
00038                                 const double* e, lapack_int m, const double* w,
00039                                 const lapack_int* iblock,
00040                                 const lapack_int* isplit,
00041                                 lapack_complex_double* z, lapack_int ldz,
00042                                 double* work, lapack_int* iwork,
00043                                 lapack_int* ifailv )
00044 {
00045     lapack_int info = 0;
00046     if( matrix_order == LAPACK_COL_MAJOR ) {
00047         /* Call LAPACK function and adjust info */
00048         LAPACK_zstein( &n, d, e, &m, w, iblock, isplit, z, &ldz, work, iwork,
00049                        ifailv, &info );
00050         if( info < 0 ) {
00051             info = info - 1;
00052         }
00053     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00054         lapack_int ldz_t = MAX(1,n);
00055         lapack_complex_double* z_t = NULL;
00056         /* Check leading dimension(s) */
00057         if( ldz < m ) {
00058             info = -10;
00059             LAPACKE_xerbla( "LAPACKE_zstein_work", info );
00060             return info;
00061         }
00062         /* Allocate memory for temporary array(s) */
00063         z_t = (lapack_complex_double*)
00064             LAPACKE_malloc( sizeof(lapack_complex_double) * ldz_t * MAX(1,m) );
00065         if( z_t == NULL ) {
00066             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00067             goto exit_level_0;
00068         }
00069         /* Call LAPACK function and adjust info */
00070         LAPACK_zstein( &n, d, e, &m, w, iblock, isplit, z_t, &ldz_t, work,
00071                        iwork, ifailv, &info );
00072         if( info < 0 ) {
00073             info = info - 1;
00074         }
00075         /* Transpose output matrices */
00076         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, m, z_t, ldz_t, z, ldz );
00077         /* Release memory and exit */
00078         LAPACKE_free( z_t );
00079 exit_level_0:
00080         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00081             LAPACKE_xerbla( "LAPACKE_zstein_work", info );
00082         }
00083     } else {
00084         info = -1;
00085         LAPACKE_xerbla( "LAPACKE_zstein_work", info );
00086     }
00087     return info;
00088 }


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