lapacke_cunglq_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
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00028 ******************************************************************************
00029 * Contents: Native middle-level C interface to LAPACK function cunglq
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_cunglq_work( int matrix_order, lapack_int m, lapack_int n,
00038                                 lapack_int k, lapack_complex_float* a,
00039                                 lapack_int lda, const lapack_complex_float* tau,
00040                                 lapack_complex_float* work, lapack_int lwork )
00041 {
00042     lapack_int info = 0;
00043     if( matrix_order == LAPACK_COL_MAJOR ) {
00044         /* Call LAPACK function and adjust info */
00045         LAPACK_cunglq( &m, &n, &k, a, &lda, tau, work, &lwork, &info );
00046         if( info < 0 ) {
00047             info = info - 1;
00048         }
00049     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00050         lapack_int lda_t = MAX(1,m);
00051         lapack_complex_float* a_t = NULL;
00052         /* Check leading dimension(s) */
00053         if( lda < n ) {
00054             info = -6;
00055             LAPACKE_xerbla( "LAPACKE_cunglq_work", info );
00056             return info;
00057         }
00058         /* Query optimal working array(s) size if requested */
00059         if( lwork == -1 ) {
00060             LAPACK_cunglq( &m, &n, &k, a, &lda_t, tau, work, &lwork, &info );
00061             return (info < 0) ? (info - 1) : info;
00062         }
00063         /* Allocate memory for temporary array(s) */
00064         a_t = (lapack_complex_float*)
00065             LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
00066         if( a_t == NULL ) {
00067             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00068             goto exit_level_0;
00069         }
00070         /* Transpose input matrices */
00071         LAPACKE_cge_trans( matrix_order, m, n, a, lda, a_t, lda_t );
00072         /* Call LAPACK function and adjust info */
00073         LAPACK_cunglq( &m, &n, &k, a_t, &lda_t, tau, work, &lwork, &info );
00074         if( info < 0 ) {
00075             info = info - 1;
00076         }
00077         /* Transpose output matrices */
00078         LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
00079         /* Release memory and exit */
00080         LAPACKE_free( a_t );
00081 exit_level_0:
00082         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00083             LAPACKE_xerbla( "LAPACKE_cunglq_work", info );
00084         }
00085     } else {
00086         info = -1;
00087         LAPACKE_xerbla( "LAPACKE_cunglq_work", info );
00088     }
00089     return info;
00090 }


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