lapacke_dgtsvx_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
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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 dgtsvx
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dgtsvx_work( int matrix_order, char fact, char trans,
00038                                 lapack_int n, lapack_int nrhs, const double* dl,
00039                                 const double* d, const double* du, double* dlf,
00040                                 double* df, double* duf, double* du2,
00041                                 lapack_int* ipiv, const double* b,
00042                                 lapack_int ldb, double* x, lapack_int ldx,
00043                                 double* rcond, double* ferr, double* berr,
00044                                 double* work, lapack_int* iwork )
00045 {
00046     lapack_int info = 0;
00047     if( matrix_order == LAPACK_COL_MAJOR ) {
00048         /* Call LAPACK function and adjust info */
00049         LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
00050                        ipiv, b, &ldb, x, &ldx, rcond, ferr, berr, work, iwork,
00051                        &info );
00052         if( info < 0 ) {
00053             info = info - 1;
00054         }
00055     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00056         lapack_int ldb_t = MAX(1,n);
00057         lapack_int ldx_t = MAX(1,n);
00058         double* b_t = NULL;
00059         double* x_t = NULL;
00060         /* Check leading dimension(s) */
00061         if( ldb < nrhs ) {
00062             info = -15;
00063             LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
00064             return info;
00065         }
00066         if( ldx < nrhs ) {
00067             info = -17;
00068             LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
00069             return info;
00070         }
00071         /* Allocate memory for temporary array(s) */
00072         b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
00073         if( b_t == NULL ) {
00074             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00075             goto exit_level_0;
00076         }
00077         x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
00078         if( x_t == NULL ) {
00079             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00080             goto exit_level_1;
00081         }
00082         /* Transpose input matrices */
00083         LAPACKE_dge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
00084         /* Call LAPACK function and adjust info */
00085         LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
00086                        ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
00087                        iwork, &info );
00088         if( info < 0 ) {
00089             info = info - 1;
00090         }
00091         /* Transpose output matrices */
00092         LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
00093         /* Release memory and exit */
00094         LAPACKE_free( x_t );
00095 exit_level_1:
00096         LAPACKE_free( b_t );
00097 exit_level_0:
00098         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00099             LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
00100         }
00101     } else {
00102         info = -1;
00103         LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
00104     }
00105     return info;
00106 }


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