lapacke_zhesvx_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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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"
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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 zhesvx
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zhesvx_work( int matrix_order, char fact, char uplo,
00038                                 lapack_int n, lapack_int nrhs,
00039                                 const lapack_complex_double* a, lapack_int lda,
00040                                 lapack_complex_double* af, lapack_int ldaf,
00041                                 lapack_int* ipiv,
00042                                 const lapack_complex_double* b, lapack_int ldb,
00043                                 lapack_complex_double* x, lapack_int ldx,
00044                                 double* rcond, double* ferr, double* berr,
00045                                 lapack_complex_double* work, lapack_int lwork,
00046                                 double* rwork )
00047 {
00048     lapack_int info = 0;
00049     if( matrix_order == LAPACK_COL_MAJOR ) {
00050         /* Call LAPACK function and adjust info */
00051         LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b,
00052                        &ldb, x, &ldx, rcond, ferr, berr, work, &lwork, rwork,
00053                        &info );
00054         if( info < 0 ) {
00055             info = info - 1;
00056         }
00057     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00058         lapack_int lda_t = MAX(1,n);
00059         lapack_int ldaf_t = MAX(1,n);
00060         lapack_int ldb_t = MAX(1,n);
00061         lapack_int ldx_t = MAX(1,n);
00062         lapack_complex_double* a_t = NULL;
00063         lapack_complex_double* af_t = NULL;
00064         lapack_complex_double* b_t = NULL;
00065         lapack_complex_double* x_t = NULL;
00066         /* Check leading dimension(s) */
00067         if( lda < n ) {
00068             info = -7;
00069             LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00070             return info;
00071         }
00072         if( ldaf < n ) {
00073             info = -9;
00074             LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00075             return info;
00076         }
00077         if( ldb < nrhs ) {
00078             info = -12;
00079             LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00080             return info;
00081         }
00082         if( ldx < nrhs ) {
00083             info = -14;
00084             LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00085             return info;
00086         }
00087         /* Query optimal working array(s) size if requested */
00088         if( lwork == -1 ) {
00089             LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a, &lda_t, af, &ldaf_t,
00090                            ipiv, b, &ldb_t, x, &ldx_t, rcond, ferr, berr, work,
00091                            &lwork, rwork, &info );
00092             return (info < 0) ? (info - 1) : info;
00093         }
00094         /* Allocate memory for temporary array(s) */
00095         a_t = (lapack_complex_double*)
00096             LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
00097         if( a_t == NULL ) {
00098             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00099             goto exit_level_0;
00100         }
00101         af_t = (lapack_complex_double*)
00102             LAPACKE_malloc( sizeof(lapack_complex_double) * ldaf_t * MAX(1,n) );
00103         if( af_t == NULL ) {
00104             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00105             goto exit_level_1;
00106         }
00107         b_t = (lapack_complex_double*)
00108             LAPACKE_malloc( sizeof(lapack_complex_double) *
00109                             ldb_t * MAX(1,nrhs) );
00110         if( b_t == NULL ) {
00111             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00112             goto exit_level_2;
00113         }
00114         x_t = (lapack_complex_double*)
00115             LAPACKE_malloc( sizeof(lapack_complex_double) *
00116                             ldx_t * MAX(1,nrhs) );
00117         if( x_t == NULL ) {
00118             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00119             goto exit_level_3;
00120         }
00121         /* Transpose input matrices */
00122         LAPACKE_zhe_trans( matrix_order, uplo, n, a, lda, a_t, lda_t );
00123         if( LAPACKE_lsame( fact, 'f' ) ) {
00124             LAPACKE_zhe_trans( matrix_order, uplo, n, af, ldaf, af_t, ldaf_t );
00125         }
00126         LAPACKE_zge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
00127         /* Call LAPACK function and adjust info */
00128         LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
00129                        ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
00130                        &lwork, rwork, &info );
00131         if( info < 0 ) {
00132             info = info - 1;
00133         }
00134         /* Transpose output matrices */
00135         if( LAPACKE_lsame( fact, 'n' ) ) {
00136             LAPACKE_zhe_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
00137                                ldaf );
00138         }
00139         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
00140         /* Release memory and exit */
00141         LAPACKE_free( x_t );
00142 exit_level_3:
00143         LAPACKE_free( b_t );
00144 exit_level_2:
00145         LAPACKE_free( af_t );
00146 exit_level_1:
00147         LAPACKE_free( a_t );
00148 exit_level_0:
00149         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00150             LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00151         }
00152     } else {
00153         info = -1;
00154         LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
00155     }
00156     return info;
00157 }


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