lapacke_zgelsd.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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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 zgelsd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zgelsd( int matrix_order, lapack_int m, lapack_int n,
00038                            lapack_int nrhs, lapack_complex_double* a,
00039                            lapack_int lda, lapack_complex_double* b,
00040                            lapack_int ldb, double* s, double rcond,
00041                            lapack_int* rank )
00042 {
00043     lapack_int info = 0;
00044     lapack_int lwork = -1;
00045     /* Additional scalars declarations for work arrays */
00046     lapack_int liwork;
00047     lapack_int lrwork;
00048     lapack_int* iwork = NULL;
00049     double* rwork = NULL;
00050     lapack_complex_double* work = NULL;
00051     lapack_int iwork_query;
00052     double rwork_query;
00053     lapack_complex_double work_query;
00054     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00055         LAPACKE_xerbla( "LAPACKE_zgelsd", -1 );
00056         return -1;
00057     }
00058 #ifndef LAPACK_DISABLE_NAN_CHECK
00059     /* Optionally check input matrices for NaNs */
00060     if( LAPACKE_zge_nancheck( matrix_order, m, n, a, lda ) ) {
00061         return -5;
00062     }
00063     if( LAPACKE_zge_nancheck( matrix_order, MAX(m,n), nrhs, b, ldb ) ) {
00064         return -7;
00065     }
00066     if( LAPACKE_d_nancheck( 1, &rcond, 1 ) ) {
00067         return -10;
00068     }
00069 #endif
00070     /* Query optimal working array(s) size */
00071     info = LAPACKE_zgelsd_work( matrix_order, m, n, nrhs, a, lda, b, ldb, s,
00072                                 rcond, rank, &work_query, lwork, &rwork_query,
00073                                 &iwork_query );
00074     if( info != 0 ) {
00075         goto exit_level_0;
00076     }
00077     liwork = (lapack_int)iwork_query;
00078     lrwork = (lapack_int)rwork_query;
00079     lwork = LAPACK_Z2INT( work_query );
00080     /* Allocate memory for work arrays */
00081     iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
00082     if( iwork == NULL ) {
00083         info = LAPACK_WORK_MEMORY_ERROR;
00084         goto exit_level_0;
00085     }
00086     rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
00087     if( rwork == NULL ) {
00088         info = LAPACK_WORK_MEMORY_ERROR;
00089         goto exit_level_1;
00090     }
00091     work = (lapack_complex_double*)
00092         LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
00093     if( work == NULL ) {
00094         info = LAPACK_WORK_MEMORY_ERROR;
00095         goto exit_level_2;
00096     }
00097     /* Call middle-level interface */
00098     info = LAPACKE_zgelsd_work( matrix_order, m, n, nrhs, a, lda, b, ldb, s,
00099                                 rcond, rank, work, lwork, rwork, iwork );
00100     /* Release memory and exit */
00101     LAPACKE_free( work );
00102 exit_level_2:
00103     LAPACKE_free( rwork );
00104 exit_level_1:
00105     LAPACKE_free( iwork );
00106 exit_level_0:
00107     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00108         LAPACKE_xerbla( "LAPACKE_zgelsd", info );
00109     }
00110     return info;
00111 }


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