1 /*
 2  *   Copyright (c) 2010, Michael Lehn
 3  *
 4  *   All rights reserved.
 5  *
 6  *   Redistribution and use in source and binary forms, with or without
 7  *   modification, are permitted provided that the following conditions
 8  *   are met:
 9  *
10  *   1) Redistributions of source code must retain the above copyright
11  *      notice, this list of conditions and the following disclaimer.
12  *   2) Redistributions in binary form must reproduce the above copyright
13  *      notice, this list of conditions and the following disclaimer in
14  *      the documentation and/or other materials provided with the
15  *      distribution.
16  *   3) Neither the name of the FLENS development group nor the names of
17  *      its contributors may be used to endorse or promote products derived
18  *      from this software without specific prior written permission.
19  *
20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #ifndef CXXBLAS_LEVEL1EXTENSIONS_SYSCAL_TCC
34 #define CXXBLAS_LEVEL1EXTENSIONS_SYSCAL_TCC 1
35 
36 #include <cassert>
37 
38 namespace cxxblas {
39 
40 template <typename IndexType, typename ALPHA, typename MA>
41 void
42 syscal(StorageOrder order, StorageUpLo upLo,
43        IndexType n,
44        const ALPHA &alpha, MA *A, IndexType ldA)
45 {
46     CXXBLAS_DEBUG_OUT("syscal_generic");
47 
48     if (alpha==ALPHA(1)) {
49         return;
50     }
51     if (order==ColMajor) {
52         upLo = (upLo==Upper) ? Lower : Upper;
53     }
54     if (upLo==Upper) {
55         for (IndexType i=0; i<n; ++i) {
56             scal(n-i, alpha, A+i*(ldA+1), IndexType(1));
57         }
58     } else {
59         for (IndexType i=0; i<n; ++i) {
60             scal(i+1, alpha, A+i*ldA, IndexType(1));
61         }
62     }
63 }
64 
65 // namespace cxxblas
66 
67 #endif // CXXBLAS_LEVEL1EXTENSIONS_SYSCAL_TCC