lapacke_zhseqr_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
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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 zhseqr
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zhseqr_work( int matrix_order, char job, char compz,
00038                                 lapack_int n, lapack_int ilo, lapack_int ihi,
00039                                 lapack_complex_double* h, lapack_int ldh,
00040                                 lapack_complex_double* w,
00041                                 lapack_complex_double* z, lapack_int ldz,
00042                                 lapack_complex_double* work, lapack_int lwork )
00043 {
00044     lapack_int info = 0;
00045     if( matrix_order == LAPACK_COL_MAJOR ) {
00046         /* Call LAPACK function and adjust info */
00047         LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h, &ldh, w, z, &ldz, work,
00048                        &lwork, &info );
00049         if( info < 0 ) {
00050             info = info - 1;
00051         }
00052     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00053         lapack_int ldh_t = MAX(1,n);
00054         lapack_int ldz_t = MAX(1,n);
00055         lapack_complex_double* h_t = NULL;
00056         lapack_complex_double* z_t = NULL;
00057         /* Check leading dimension(s) */
00058         if( ldh < n ) {
00059             info = -8;
00060             LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
00061             return info;
00062         }
00063         if( ldz < n ) {
00064             info = -11;
00065             LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
00066             return info;
00067         }
00068         /* Query optimal working array(s) size if requested */
00069         if( lwork == -1 ) {
00070             LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h, &ldh_t, w, z,
00071                            &ldz_t, work, &lwork, &info );
00072             return (info < 0) ? (info - 1) : info;
00073         }
00074         /* Allocate memory for temporary array(s) */
00075         h_t = (lapack_complex_double*)
00076             LAPACKE_malloc( sizeof(lapack_complex_double) * ldh_t * MAX(1,n) );
00077         if( h_t == NULL ) {
00078             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00079             goto exit_level_0;
00080         }
00081         if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00082             z_t = (lapack_complex_double*)
00083                 LAPACKE_malloc( sizeof(lapack_complex_double) *
00084                                 ldz_t * MAX(1,n) );
00085             if( z_t == NULL ) {
00086                 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00087                 goto exit_level_1;
00088             }
00089         }
00090         /* Transpose input matrices */
00091         LAPACKE_zge_trans( matrix_order, n, n, h, ldh, h_t, ldh_t );
00092         if( LAPACKE_lsame( compz, 'v' ) ) {
00093             LAPACKE_zge_trans( matrix_order, n, n, z, ldz, z_t, ldz_t );
00094         }
00095         /* Call LAPACK function and adjust info */
00096         LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h_t, &ldh_t, w, z_t,
00097                        &ldz_t, work, &lwork, &info );
00098         if( info < 0 ) {
00099             info = info - 1;
00100         }
00101         /* Transpose output matrices */
00102         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, h_t, ldh_t, h, ldh );
00103         if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00104             LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
00105         }
00106         /* Release memory and exit */
00107         if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00108             LAPACKE_free( z_t );
00109         }
00110 exit_level_1:
00111         LAPACKE_free( h_t );
00112 exit_level_0:
00113         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00114             LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
00115         }
00116     } else {
00117         info = -1;
00118         LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
00119     }
00120     return info;
00121 }


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