lapacke_dormqr_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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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 middle-level C interface to LAPACK function dormqr
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dormqr_work( int matrix_order, char side, char trans,
00038                                 lapack_int m, lapack_int n, lapack_int k,
00039                                 const double* a, lapack_int lda,
00040                                 const double* tau, double* c, lapack_int ldc,
00041                                 double* work, lapack_int lwork )
00042 {
00043     lapack_int info = 0;
00044     if( matrix_order == LAPACK_COL_MAJOR ) {
00045         /* Call LAPACK function and adjust info */
00046         LAPACK_dormqr( &side, &trans, &m, &n, &k, a, &lda, tau, c, &ldc, work,
00047                        &lwork, &info );
00048         if( info < 0 ) {
00049             info = info - 1;
00050         }
00051     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00052         lapack_int r = LAPACKE_lsame( side, 'l' ) ? m : n;
00053         lapack_int lda_t = MAX(1,r);
00054         lapack_int ldc_t = MAX(1,m);
00055         double* a_t = NULL;
00056         double* c_t = NULL;
00057         /* Check leading dimension(s) */
00058         if( lda < k ) {
00059             info = -8;
00060             LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
00061             return info;
00062         }
00063         if( ldc < n ) {
00064             info = -11;
00065             LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
00066             return info;
00067         }
00068         /* Query optimal working array(s) size if requested */
00069         if( lwork == -1 ) {
00070             LAPACK_dormqr( &side, &trans, &m, &n, &k, a, &lda_t, tau, c, &ldc_t,
00071                            work, &lwork, &info );
00072             return (info < 0) ? (info - 1) : info;
00073         }
00074         /* Allocate memory for temporary array(s) */
00075         a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,k) );
00076         if( a_t == NULL ) {
00077             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00078             goto exit_level_0;
00079         }
00080         c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
00081         if( c_t == NULL ) {
00082             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00083             goto exit_level_1;
00084         }
00085         /* Transpose input matrices */
00086         LAPACKE_dge_trans( matrix_order, r, k, a, lda, a_t, lda_t );
00087         LAPACKE_dge_trans( matrix_order, m, n, c, ldc, c_t, ldc_t );
00088         /* Call LAPACK function and adjust info */
00089         LAPACK_dormqr( &side, &trans, &m, &n, &k, a_t, &lda_t, tau, c_t, &ldc_t,
00090                        work, &lwork, &info );
00091         if( info < 0 ) {
00092             info = info - 1;
00093         }
00094         /* Transpose output matrices */
00095         LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
00096         /* Release memory and exit */
00097         LAPACKE_free( c_t );
00098 exit_level_1:
00099         LAPACKE_free( a_t );
00100 exit_level_0:
00101         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00102             LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
00103         }
00104     } else {
00105         info = -1;
00106         LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
00107     }
00108     return info;
00109 }


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