lapacke_zsprfs_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
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00028 ******************************************************************************
00029 * Contents: Native middle-level C interface to LAPACK function zsprfs
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zsprfs_work( int matrix_order, char uplo, lapack_int n,
00038                                 lapack_int nrhs,
00039                                 const lapack_complex_double* ap,
00040                                 const lapack_complex_double* afp,
00041                                 const lapack_int* ipiv,
00042                                 const lapack_complex_double* b, lapack_int ldb,
00043                                 lapack_complex_double* x, lapack_int ldx,
00044                                 double* ferr, double* berr,
00045                                 lapack_complex_double* work, double* rwork )
00046 {
00047     lapack_int info = 0;
00048     if( matrix_order == LAPACK_COL_MAJOR ) {
00049         /* Call LAPACK function and adjust info */
00050         LAPACK_zsprfs( &uplo, &n, &nrhs, ap, afp, ipiv, b, &ldb, x, &ldx, ferr,
00051                        berr, work, rwork, &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         lapack_complex_double* b_t = NULL;
00059         lapack_complex_double* x_t = NULL;
00060         lapack_complex_double* ap_t = NULL;
00061         lapack_complex_double* afp_t = NULL;
00062         /* Check leading dimension(s) */
00063         if( ldb < nrhs ) {
00064             info = -9;
00065             LAPACKE_xerbla( "LAPACKE_zsprfs_work", info );
00066             return info;
00067         }
00068         if( ldx < nrhs ) {
00069             info = -11;
00070             LAPACKE_xerbla( "LAPACKE_zsprfs_work", info );
00071             return info;
00072         }
00073         /* Allocate memory for temporary array(s) */
00074         b_t = (lapack_complex_double*)
00075             LAPACKE_malloc( sizeof(lapack_complex_double) *
00076                             ldb_t * MAX(1,nrhs) );
00077         if( b_t == NULL ) {
00078             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00079             goto exit_level_0;
00080         }
00081         x_t = (lapack_complex_double*)
00082             LAPACKE_malloc( sizeof(lapack_complex_double) *
00083                             ldx_t * MAX(1,nrhs) );
00084         if( x_t == NULL ) {
00085             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00086             goto exit_level_1;
00087         }
00088         ap_t = (lapack_complex_double*)
00089             LAPACKE_malloc( sizeof(lapack_complex_double) *
00090                             ( MAX(1,n) * MAX(2,n+1) ) / 2 );
00091         if( ap_t == NULL ) {
00092             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00093             goto exit_level_2;
00094         }
00095         afp_t = (lapack_complex_double*)
00096             LAPACKE_malloc( sizeof(lapack_complex_double) *
00097                             ( MAX(1,n) * MAX(2,n+1) ) / 2 );
00098         if( afp_t == NULL ) {
00099             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00100             goto exit_level_3;
00101         }
00102         /* Transpose input matrices */
00103         LAPACKE_zge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
00104         LAPACKE_zge_trans( matrix_order, n, nrhs, x, ldx, x_t, ldx_t );
00105         LAPACKE_zsp_trans( matrix_order, uplo, n, ap, ap_t );
00106         LAPACKE_zsp_trans( matrix_order, uplo, n, afp, afp_t );
00107         /* Call LAPACK function and adjust info */
00108         LAPACK_zsprfs( &uplo, &n, &nrhs, ap_t, afp_t, ipiv, b_t, &ldb_t, x_t,
00109                        &ldx_t, ferr, berr, work, rwork, &info );
00110         if( info < 0 ) {
00111             info = info - 1;
00112         }
00113         /* Transpose output matrices */
00114         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
00115         /* Release memory and exit */
00116         LAPACKE_free( afp_t );
00117 exit_level_3:
00118         LAPACKE_free( ap_t );
00119 exit_level_2:
00120         LAPACKE_free( x_t );
00121 exit_level_1:
00122         LAPACKE_free( b_t );
00123 exit_level_0:
00124         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00125             LAPACKE_xerbla( "LAPACKE_zsprfs_work", info );
00126         }
00127     } else {
00128         info = -1;
00129         LAPACKE_xerbla( "LAPACKE_zsprfs_work", info );
00130     }
00131     return info;
00132 }


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