lapacke_dsyev_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
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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
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00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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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 middle-level C interface to LAPACK function dsyev
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dsyev_work( int matrix_order, char jobz, char uplo,
00038                                lapack_int n, double* a, lapack_int lda,
00039                                double* w, double* work, lapack_int lwork )
00040 {
00041     lapack_int info = 0;
00042     if( matrix_order == LAPACK_COL_MAJOR ) {
00043         /* Call LAPACK function and adjust info */
00044         LAPACK_dsyev( &jobz, &uplo, &n, a, &lda, w, work, &lwork, &info );
00045         if( info < 0 ) {
00046             info = info - 1;
00047         }
00048     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00049         lapack_int lda_t = MAX(1,n);
00050         double* a_t = NULL;
00051         /* Check leading dimension(s) */
00052         if( lda < n ) {
00053             info = -6;
00054             LAPACKE_xerbla( "LAPACKE_dsyev_work", info );
00055             return info;
00056         }
00057         /* Query optimal working array(s) size if requested */
00058         if( lwork == -1 ) {
00059             LAPACK_dsyev( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, &info );
00060             return (info < 0) ? (info - 1) : info;
00061         }
00062         /* Allocate memory for temporary array(s) */
00063         a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
00064         if( a_t == NULL ) {
00065             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00066             goto exit_level_0;
00067         }
00068         /* Transpose input matrices */
00069         LAPACKE_dge_trans( matrix_order, n, n, a, lda, a_t, lda_t );
00070         /* Call LAPACK function and adjust info */
00071         LAPACK_dsyev( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, &info );
00072         if( info < 0 ) {
00073             info = info - 1;
00074         }
00075         /* Transpose output matrices */
00076         LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
00077         /* Release memory and exit */
00078         LAPACKE_free( a_t );
00079 exit_level_0:
00080         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00081             LAPACKE_xerbla( "LAPACKE_dsyev_work", info );
00082         }
00083     } else {
00084         info = -1;
00085         LAPACKE_xerbla( "LAPACKE_dsyev_work", info );
00086     }
00087     return info;
00088 }


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