lapacke_zgelsy_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
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00026   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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00028 ******************************************************************************
00029 * Contents: Native middle-level C interface to LAPACK function zgelsy
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zgelsy_work( 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, lapack_int* jpvt, double rcond,
00041                                 lapack_int* rank, lapack_complex_double* work,
00042                                 lapack_int lwork, double* rwork )
00043 {
00044     lapack_int info = 0;
00045     if( matrix_order == LAPACK_COL_MAJOR ) {
00046         /* Call LAPACK function and adjust info */
00047         LAPACK_zgelsy( &m, &n, &nrhs, a, &lda, b, &ldb, jpvt, &rcond, rank,
00048                        work, &lwork, rwork, &info );
00049         if( info < 0 ) {
00050             info = info - 1;
00051         }
00052     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00053         lapack_int lda_t = MAX(1,m);
00054         lapack_int ldb_t = MAX(1,MAX(m,n));
00055         lapack_complex_double* a_t = NULL;
00056         lapack_complex_double* b_t = NULL;
00057         /* Check leading dimension(s) */
00058         if( lda < n ) {
00059             info = -6;
00060             LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
00061             return info;
00062         }
00063         if( ldb < nrhs ) {
00064             info = -8;
00065             LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
00066             return info;
00067         }
00068         /* Query optimal working array(s) size if requested */
00069         if( lwork == -1 ) {
00070             LAPACK_zgelsy( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, jpvt, &rcond,
00071                            rank, work, &lwork, rwork, &info );
00072             return (info < 0) ? (info - 1) : info;
00073         }
00074         /* Allocate memory for temporary array(s) */
00075         a_t = (lapack_complex_double*)
00076             LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
00077         if( a_t == NULL ) {
00078             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00079             goto exit_level_0;
00080         }
00081         b_t = (lapack_complex_double*)
00082             LAPACKE_malloc( sizeof(lapack_complex_double) *
00083                             ldb_t * MAX(1,nrhs) );
00084         if( b_t == NULL ) {
00085             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00086             goto exit_level_1;
00087         }
00088         /* Transpose input matrices */
00089         LAPACKE_zge_trans( matrix_order, m, n, a, lda, a_t, lda_t );
00090         LAPACKE_zge_trans( matrix_order, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
00091         /* Call LAPACK function and adjust info */
00092         LAPACK_zgelsy( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, jpvt, &rcond,
00093                        rank, work, &lwork, rwork, &info );
00094         if( info < 0 ) {
00095             info = info - 1;
00096         }
00097         /* Transpose output matrices */
00098         LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
00099         LAPACKE_zge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
00100                            ldb );
00101         /* Release memory and exit */
00102         LAPACKE_free( b_t );
00103 exit_level_1:
00104         LAPACKE_free( a_t );
00105 exit_level_0:
00106         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00107             LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
00108         }
00109     } else {
00110         info = -1;
00111         LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
00112     }
00113     return info;
00114 }


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