lapacke_dsysv_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 dsysv
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dsysv_work( int matrix_order, char uplo, lapack_int n,
00038                                lapack_int nrhs, double* a, lapack_int lda,
00039                                lapack_int* ipiv, double* b, lapack_int ldb,
00040                                double* work, lapack_int lwork )
00041 {
00042     lapack_int info = 0;
00043     if( matrix_order == LAPACK_COL_MAJOR ) {
00044         /* Call LAPACK function and adjust info */
00045         LAPACK_dsysv( &uplo, &n, &nrhs, a, &lda, ipiv, b, &ldb, work, &lwork,
00046                       &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,n);
00052         lapack_int ldb_t = MAX(1,n);
00053         double* a_t = NULL;
00054         double* b_t = NULL;
00055         /* Check leading dimension(s) */
00056         if( lda < n ) {
00057             info = -6;
00058             LAPACKE_xerbla( "LAPACKE_dsysv_work", info );
00059             return info;
00060         }
00061         if( ldb < nrhs ) {
00062             info = -9;
00063             LAPACKE_xerbla( "LAPACKE_dsysv_work", info );
00064             return info;
00065         }
00066         /* Query optimal working array(s) size if requested */
00067         if( lwork == -1 ) {
00068             LAPACK_dsysv( &uplo, &n, &nrhs, a, &lda_t, ipiv, b, &ldb_t, work,
00069                           &lwork, &info );
00070             return (info < 0) ? (info - 1) : info;
00071         }
00072         /* Allocate memory for temporary array(s) */
00073         a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
00074         if( a_t == NULL ) {
00075             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00076             goto exit_level_0;
00077         }
00078         b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
00079         if( b_t == NULL ) {
00080             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00081             goto exit_level_1;
00082         }
00083         /* Transpose input matrices */
00084         LAPACKE_dsy_trans( matrix_order, uplo, n, a, lda, a_t, lda_t );
00085         LAPACKE_dge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
00086         /* Call LAPACK function and adjust info */
00087         LAPACK_dsysv( &uplo, &n, &nrhs, a_t, &lda_t, ipiv, b_t, &ldb_t, work,
00088                       &lwork, &info );
00089         if( info < 0 ) {
00090             info = info - 1;
00091         }
00092         /* Transpose output matrices */
00093         LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
00094         LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
00095         /* Release memory and exit */
00096         LAPACKE_free( b_t );
00097 exit_level_1:
00098         LAPACKE_free( a_t );
00099 exit_level_0:
00100         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00101             LAPACKE_xerbla( "LAPACKE_dsysv_work", info );
00102         }
00103     } else {
00104         info = -1;
00105         LAPACKE_xerbla( "LAPACKE_dsysv_work", info );
00106     }
00107     return info;
00108 }


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