lapacke_zhpevd_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 zhpevd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zhpevd_work( int matrix_order, char jobz, char uplo,
00038                                 lapack_int n, lapack_complex_double* ap,
00039                                 double* w, lapack_complex_double* z,
00040                                 lapack_int ldz, lapack_complex_double* work,
00041                                 lapack_int lwork, double* rwork,
00042                                 lapack_int lrwork, lapack_int* iwork,
00043                                 lapack_int liwork )
00044 {
00045     lapack_int info = 0;
00046     if( matrix_order == LAPACK_COL_MAJOR ) {
00047         /* Call LAPACK function and adjust info */
00048         LAPACK_zhpevd( &jobz, &uplo, &n, ap, w, z, &ldz, work, &lwork, rwork,
00049                        &lrwork, iwork, &liwork, &info );
00050         if( info < 0 ) {
00051             info = info - 1;
00052         }
00053     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00054         lapack_int ldz_t = MAX(1,n);
00055         lapack_complex_double* z_t = NULL;
00056         lapack_complex_double* ap_t = NULL;
00057         /* Check leading dimension(s) */
00058         if( ldz < n ) {
00059             info = -8;
00060             LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
00061             return info;
00062         }
00063         /* Query optimal working array(s) size if requested */
00064         if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
00065             LAPACK_zhpevd( &jobz, &uplo, &n, ap, w, z, &ldz_t, work, &lwork,
00066                            rwork, &lrwork, iwork, &liwork, &info );
00067             return (info < 0) ? (info - 1) : info;
00068         }
00069         /* Allocate memory for temporary array(s) */
00070         if( LAPACKE_lsame( jobz, 'v' ) ) {
00071             z_t = (lapack_complex_double*)
00072                 LAPACKE_malloc( sizeof(lapack_complex_double) *
00073                                 ldz_t * MAX(1,n) );
00074             if( z_t == NULL ) {
00075                 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00076                 goto exit_level_0;
00077             }
00078         }
00079         ap_t = (lapack_complex_double*)
00080             LAPACKE_malloc( sizeof(lapack_complex_double) *
00081                             ( MAX(1,n) * MAX(2,n+1) ) / 2 );
00082         if( ap_t == NULL ) {
00083             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00084             goto exit_level_1;
00085         }
00086         /* Transpose input matrices */
00087         LAPACKE_zhp_trans( matrix_order, uplo, n, ap, ap_t );
00088         /* Call LAPACK function and adjust info */
00089         LAPACK_zhpevd( &jobz, &uplo, &n, ap_t, w, z_t, &ldz_t, work, &lwork,
00090                        rwork, &lrwork, iwork, &liwork, &info );
00091         if( info < 0 ) {
00092             info = info - 1;
00093         }
00094         /* Transpose output matrices */
00095         if( LAPACKE_lsame( jobz, 'v' ) ) {
00096             LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
00097         }
00098         LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
00099         /* Release memory and exit */
00100         LAPACKE_free( ap_t );
00101 exit_level_1:
00102         if( LAPACKE_lsame( jobz, 'v' ) ) {
00103             LAPACKE_free( z_t );
00104         }
00105 exit_level_0:
00106         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00107             LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
00108         }
00109     } else {
00110         info = -1;
00111         LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
00112     }
00113     return info;
00114 }


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