lapacke_chegvd.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 high-level C interface to LAPACK function chegvd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_chegvd( int matrix_order, lapack_int itype, char jobz,
00038                            char uplo, lapack_int n, lapack_complex_float* a,
00039                            lapack_int lda, lapack_complex_float* b,
00040                            lapack_int ldb, float* w )
00041 {
00042     lapack_int info = 0;
00043     lapack_int liwork = -1;
00044     lapack_int lrwork = -1;
00045     lapack_int lwork = -1;
00046     lapack_int* iwork = NULL;
00047     float* rwork = NULL;
00048     lapack_complex_float* work = NULL;
00049     lapack_int iwork_query;
00050     float rwork_query;
00051     lapack_complex_float work_query;
00052     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00053         LAPACKE_xerbla( "LAPACKE_chegvd", -1 );
00054         return -1;
00055     }
00056 #ifndef LAPACK_DISABLE_NAN_CHECK
00057     /* Optionally check input matrices for NaNs */
00058     if( LAPACKE_cge_nancheck( matrix_order, n, n, a, lda ) ) {
00059         return -6;
00060     }
00061     if( LAPACKE_cge_nancheck( matrix_order, n, n, b, ldb ) ) {
00062         return -8;
00063     }
00064 #endif
00065     /* Query optimal working array(s) size */
00066     info = LAPACKE_chegvd_work( matrix_order, itype, jobz, uplo, n, a, lda, b,
00067                                 ldb, w, &work_query, lwork, &rwork_query,
00068                                 lrwork, &iwork_query, liwork );
00069     if( info != 0 ) {
00070         goto exit_level_0;
00071     }
00072     liwork = (lapack_int)iwork_query;
00073     lrwork = (lapack_int)rwork_query;
00074     lwork = LAPACK_C2INT( work_query );
00075     /* Allocate memory for work arrays */
00076     iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
00077     if( iwork == NULL ) {
00078         info = LAPACK_WORK_MEMORY_ERROR;
00079         goto exit_level_0;
00080     }
00081     rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
00082     if( rwork == NULL ) {
00083         info = LAPACK_WORK_MEMORY_ERROR;
00084         goto exit_level_1;
00085     }
00086     work = (lapack_complex_float*)
00087         LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
00088     if( work == NULL ) {
00089         info = LAPACK_WORK_MEMORY_ERROR;
00090         goto exit_level_2;
00091     }
00092     /* Call middle-level interface */
00093     info = LAPACKE_chegvd_work( matrix_order, itype, jobz, uplo, n, a, lda, b,
00094                                 ldb, w, work, lwork, rwork, lrwork, iwork,
00095                                 liwork );
00096     /* Release memory and exit */
00097     LAPACKE_free( work );
00098 exit_level_2:
00099     LAPACKE_free( rwork );
00100 exit_level_1:
00101     LAPACKE_free( iwork );
00102 exit_level_0:
00103     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00104         LAPACKE_xerbla( "LAPACKE_chegvd", info );
00105     }
00106     return info;
00107 }


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