lapacke_ztrexc_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
00022   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 ztrexc
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_ztrexc_work( int matrix_order, char compq, lapack_int n,
00038                                 lapack_complex_double* t, lapack_int ldt,
00039                                 lapack_complex_double* q, lapack_int ldq,
00040                                 lapack_int ifst, lapack_int ilst )
00041 {
00042     lapack_int info = 0;
00043     if( matrix_order == LAPACK_COL_MAJOR ) {
00044         /* Call LAPACK function and adjust info */
00045         LAPACK_ztrexc( &compq, &n, t, &ldt, q, &ldq, &ifst, &ilst, &info );
00046         if( info < 0 ) {
00047             info = info - 1;
00048         }
00049     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00050         lapack_int ldq_t = MAX(1,n);
00051         lapack_int ldt_t = MAX(1,n);
00052         lapack_complex_double* t_t = NULL;
00053         lapack_complex_double* q_t = NULL;
00054         /* Check leading dimension(s) */
00055         if( ldq < n ) {
00056             info = -7;
00057             LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
00058             return info;
00059         }
00060         if( ldt < n ) {
00061             info = -5;
00062             LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
00063             return info;
00064         }
00065         /* Allocate memory for temporary array(s) */
00066         t_t = (lapack_complex_double*)
00067             LAPACKE_malloc( sizeof(lapack_complex_double) * ldt_t * MAX(1,n) );
00068         if( t_t == NULL ) {
00069             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00070             goto exit_level_0;
00071         }
00072         if( LAPACKE_lsame( compq, 'v' ) ) {
00073             q_t = (lapack_complex_double*)
00074                 LAPACKE_malloc( sizeof(lapack_complex_double) *
00075                                 ldq_t * MAX(1,n) );
00076             if( q_t == NULL ) {
00077                 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00078                 goto exit_level_1;
00079             }
00080         }
00081         /* Transpose input matrices */
00082         LAPACKE_zge_trans( matrix_order, n, n, t, ldt, t_t, ldt_t );
00083         if( LAPACKE_lsame( compq, 'v' ) ) {
00084             LAPACKE_zge_trans( matrix_order, n, n, q, ldq, q_t, ldq_t );
00085         }
00086         /* Call LAPACK function and adjust info */
00087         LAPACK_ztrexc( &compq, &n, t_t, &ldt_t, q_t, &ldq_t, &ifst, &ilst,
00088                        &info );
00089         if( info < 0 ) {
00090             info = info - 1;
00091         }
00092         /* Transpose output matrices */
00093         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, t_t, ldt_t, t, ldt );
00094         if( LAPACKE_lsame( compq, 'v' ) ) {
00095             LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
00096         }
00097         /* Release memory and exit */
00098         if( LAPACKE_lsame( compq, 'v' ) ) {
00099             LAPACKE_free( q_t );
00100         }
00101 exit_level_1:
00102         LAPACKE_free( t_t );
00103 exit_level_0:
00104         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00105             LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
00106         }
00107     } else {
00108         info = -1;
00109         LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
00110     }
00111     return info;
00112 }


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