lapacke_zgesvd.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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00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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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 high-level C interface to LAPACK function zgesvd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zgesvd( int matrix_order, char jobu, char jobvt,
00038                            lapack_int m, lapack_int n, lapack_complex_double* a,
00039                            lapack_int lda, double* s, lapack_complex_double* u,
00040                            lapack_int ldu, lapack_complex_double* vt,
00041                            lapack_int ldvt, double* superb )
00042 {
00043     lapack_int info = 0;
00044     lapack_int lwork = -1;
00045     double* rwork = NULL;
00046     lapack_complex_double* work = NULL;
00047     lapack_complex_double work_query;
00048     lapack_int i;
00049     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00050         LAPACKE_xerbla( "LAPACKE_zgesvd", -1 );
00051         return -1;
00052     }
00053 #ifndef LAPACK_DISABLE_NAN_CHECK
00054     /* Optionally check input matrices for NaNs */
00055     if( LAPACKE_zge_nancheck( matrix_order, m, n, a, lda ) ) {
00056         return -6;
00057     }
00058 #endif
00059     /* Allocate memory for working array(s) */
00060     rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*MIN(m,n)) );
00061     if( rwork == NULL ) {
00062         info = LAPACK_WORK_MEMORY_ERROR;
00063         goto exit_level_0;
00064     }
00065     /* Query optimal working array(s) size */
00066     info = LAPACKE_zgesvd_work( matrix_order, jobu, jobvt, m, n, a, lda, s, u,
00067                                 ldu, vt, ldvt, &work_query, lwork, rwork );
00068     if( info != 0 ) {
00069         goto exit_level_1;
00070     }
00071     lwork = LAPACK_Z2INT( work_query );
00072     /* Allocate memory for work arrays */
00073     work = (lapack_complex_double*)
00074         LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
00075     if( work == NULL ) {
00076         info = LAPACK_WORK_MEMORY_ERROR;
00077         goto exit_level_1;
00078     }
00079     /* Call middle-level interface */
00080     info = LAPACKE_zgesvd_work( matrix_order, jobu, jobvt, m, n, a, lda, s, u,
00081                                 ldu, vt, ldvt, work, lwork, rwork );
00082     /* Backup significant data from working array(s) */
00083     for( i=0; i<MIN(m,n)-1; i++ ) {
00084         superb[i] = rwork[i];
00085     }
00086     /* Release memory and exit */
00087     LAPACKE_free( work );
00088 exit_level_1:
00089     LAPACKE_free( rwork );
00090 exit_level_0:
00091     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00092         LAPACKE_xerbla( "LAPACKE_zgesvd", info );
00093     }
00094     return info;
00095 }


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autogenerated on Sat Jun 8 2019 18:55:55