lapacke_sgbrfs_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
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 sgbrfs
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_sgbrfs_work( int matrix_order, char trans, lapack_int n,
00038                                 lapack_int kl, lapack_int ku, lapack_int nrhs,
00039                                 const float* ab, lapack_int ldab,
00040                                 const float* afb, lapack_int ldafb,
00041                                 const lapack_int* ipiv, const float* b,
00042                                 lapack_int ldb, float* x, lapack_int ldx,
00043                                 float* ferr, float* berr, float* work,
00044                                 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_sgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
00050                        ipiv, b, &ldb, x, &ldx, ferr, berr, work, iwork, &info );
00051         if( info < 0 ) {
00052             info = info - 1;
00053         }
00054     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00055         lapack_int ldab_t = MAX(1,kl+ku+1);
00056         lapack_int ldafb_t = MAX(1,2*kl+ku+1);
00057         lapack_int ldb_t = MAX(1,n);
00058         lapack_int ldx_t = MAX(1,n);
00059         float* ab_t = NULL;
00060         float* afb_t = NULL;
00061         float* b_t = NULL;
00062         float* x_t = NULL;
00063         /* Check leading dimension(s) */
00064         if( ldab < n ) {
00065             info = -8;
00066             LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00067             return info;
00068         }
00069         if( ldafb < n ) {
00070             info = -10;
00071             LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00072             return info;
00073         }
00074         if( ldb < nrhs ) {
00075             info = -13;
00076             LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00077             return info;
00078         }
00079         if( ldx < nrhs ) {
00080             info = -15;
00081             LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00082             return info;
00083         }
00084         /* Allocate memory for temporary array(s) */
00085         ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
00086         if( ab_t == NULL ) {
00087             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00088             goto exit_level_0;
00089         }
00090         afb_t = (float*)LAPACKE_malloc( sizeof(float) * ldafb_t * MAX(1,n) );
00091         if( afb_t == NULL ) {
00092             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00093             goto exit_level_1;
00094         }
00095         b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
00096         if( b_t == NULL ) {
00097             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00098             goto exit_level_2;
00099         }
00100         x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
00101         if( x_t == NULL ) {
00102             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00103             goto exit_level_3;
00104         }
00105         /* Transpose input matrices */
00106         LAPACKE_sgb_trans( matrix_order, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
00107         LAPACKE_sgb_trans( matrix_order, n, n, kl, kl+ku, afb, ldafb, afb_t,
00108                            ldafb_t );
00109         LAPACKE_sge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
00110         LAPACKE_sge_trans( matrix_order, n, nrhs, x, ldx, x_t, ldx_t );
00111         /* Call LAPACK function and adjust info */
00112         LAPACK_sgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
00113                        &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
00114                        work, iwork, &info );
00115         if( info < 0 ) {
00116             info = info - 1;
00117         }
00118         /* Transpose output matrices */
00119         LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
00120         /* Release memory and exit */
00121         LAPACKE_free( x_t );
00122 exit_level_3:
00123         LAPACKE_free( b_t );
00124 exit_level_2:
00125         LAPACKE_free( afb_t );
00126 exit_level_1:
00127         LAPACKE_free( ab_t );
00128 exit_level_0:
00129         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00130             LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00131         }
00132     } else {
00133         info = -1;
00134         LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
00135     }
00136     return info;
00137 }


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