lapacke_sgesvd.c
Go to the documentation of this file.
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 high-level C interface to LAPACK function sgesvd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_sgesvd( int matrix_order, char jobu, char jobvt,
00038                            lapack_int m, lapack_int n, float* a, lapack_int lda,
00039                            float* s, float* u, lapack_int ldu, float* vt,
00040                            lapack_int ldvt, float* superb )
00041 {
00042     lapack_int info = 0;
00043     lapack_int lwork = -1;
00044     float* work = NULL;
00045     float work_query;
00046     lapack_int i;
00047     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00048         LAPACKE_xerbla( "LAPACKE_sgesvd", -1 );
00049         return -1;
00050     }
00051 #ifndef LAPACK_DISABLE_NAN_CHECK
00052     /* Optionally check input matrices for NaNs */
00053     if( LAPACKE_sge_nancheck( matrix_order, m, n, a, lda ) ) {
00054         return -6;
00055     }
00056 #endif
00057     /* Query optimal working array(s) size */
00058     info = LAPACKE_sgesvd_work( matrix_order, jobu, jobvt, m, n, a, lda, s, u,
00059                                 ldu, vt, ldvt, &work_query, lwork );
00060     if( info != 0 ) {
00061         goto exit_level_0;
00062     }
00063     lwork = (lapack_int)work_query;
00064     /* Allocate memory for work arrays */
00065     work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
00066     if( work == NULL ) {
00067         info = LAPACK_WORK_MEMORY_ERROR;
00068         goto exit_level_0;
00069     }
00070     /* Call middle-level interface */
00071     info = LAPACKE_sgesvd_work( matrix_order, jobu, jobvt, m, n, a, lda, s, u,
00072                                 ldu, vt, ldvt, work, lwork );
00073     /* Backup significant data from working array(s) */
00074     for( i=0; i<MIN(m,n)-1; i++ ) {
00075         superb[i] = work[i+1];
00076     }
00077     /* Release memory and exit */
00078     LAPACKE_free( work );
00079 exit_level_0:
00080     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00081         LAPACKE_xerbla( "LAPACKE_sgesvd", info );
00082     }
00083     return info;
00084 }


swiftnav
Author(s):
autogenerated on Sat Jun 8 2019 18:55:53