lapacke_zhpgvx_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 zhpgvx
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zhpgvx_work( int matrix_order, lapack_int itype, char jobz,
00038                                 char range, char uplo, lapack_int n,
00039                                 lapack_complex_double* ap,
00040                                 lapack_complex_double* bp, double vl, double vu,
00041                                 lapack_int il, lapack_int iu, double abstol,
00042                                 lapack_int* m, double* w,
00043                                 lapack_complex_double* z, lapack_int ldz,
00044                                 lapack_complex_double* work, double* rwork,
00045                                 lapack_int* iwork, lapack_int* ifail )
00046 {
00047     lapack_int info = 0;
00048     if( matrix_order == LAPACK_COL_MAJOR ) {
00049         /* Call LAPACK function and adjust info */
00050         LAPACK_zhpgvx( &itype, &jobz, &range, &uplo, &n, ap, bp, &vl, &vu, &il,
00051                        &iu, &abstol, m, w, z, &ldz, work, rwork, iwork, ifail,
00052                        &info );
00053         if( info < 0 ) {
00054             info = info - 1;
00055         }
00056     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00057         lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
00058                              LAPACKE_lsame( range, 'v' ) ) ? n :
00059                              ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
00060         lapack_int ldz_t = MAX(1,n);
00061         lapack_complex_double* z_t = NULL;
00062         lapack_complex_double* ap_t = NULL;
00063         lapack_complex_double* bp_t = NULL;
00064         /* Check leading dimension(s) */
00065         if( ldz < ncols_z ) {
00066             info = -17;
00067             LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
00068             return info;
00069         }
00070         /* Allocate memory for temporary array(s) */
00071         if( LAPACKE_lsame( jobz, 'v' ) ) {
00072             z_t = (lapack_complex_double*)
00073                 LAPACKE_malloc( sizeof(lapack_complex_double) *
00074                                 ldz_t * MAX(1,ncols_z) );
00075             if( z_t == NULL ) {
00076                 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00077                 goto exit_level_0;
00078             }
00079         }
00080         ap_t = (lapack_complex_double*)
00081             LAPACKE_malloc( sizeof(lapack_complex_double) *
00082                             ( MAX(1,n) * MAX(2,n+1) ) / 2 );
00083         if( ap_t == NULL ) {
00084             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00085             goto exit_level_1;
00086         }
00087         bp_t = (lapack_complex_double*)
00088             LAPACKE_malloc( sizeof(lapack_complex_double) *
00089                             ( MAX(1,n) * MAX(2,n+1) ) / 2 );
00090         if( bp_t == NULL ) {
00091             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00092             goto exit_level_2;
00093         }
00094         /* Transpose input matrices */
00095         LAPACKE_zhp_trans( matrix_order, uplo, n, ap, ap_t );
00096         LAPACKE_zhp_trans( matrix_order, uplo, n, bp, bp_t );
00097         /* Call LAPACK function and adjust info */
00098         LAPACK_zhpgvx( &itype, &jobz, &range, &uplo, &n, ap_t, bp_t, &vl, &vu,
00099                        &il, &iu, &abstol, m, w, z_t, &ldz_t, work, rwork, iwork,
00100                        ifail, &info );
00101         if( info < 0 ) {
00102             info = info - 1;
00103         }
00104         /* Transpose output matrices */
00105         if( LAPACKE_lsame( jobz, 'v' ) ) {
00106             LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
00107                                ldz );
00108         }
00109         LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
00110         LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
00111         /* Release memory and exit */
00112         LAPACKE_free( bp_t );
00113 exit_level_2:
00114         LAPACKE_free( ap_t );
00115 exit_level_1:
00116         if( LAPACKE_lsame( jobz, 'v' ) ) {
00117             LAPACKE_free( z_t );
00118         }
00119 exit_level_0:
00120         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00121             LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
00122         }
00123     } else {
00124         info = -1;
00125         LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
00126     }
00127     return info;
00128 }


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