1 /*
2 * Copyright (c) 2009, 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_LEVEL2_SYR2_TCC
34 #define CXXBLAS_LEVEL2_SYR2_TCC 1
35
36 #include <complex>
37 #include <cxxblas/level1/level1.h>
38
39 namespace cxxblas {
40
41 template <typename IndexType, typename ALPHA, typename VX, typename VY,
42 typename MA>
43 void
44 syr2_generic(StorageOrder order, StorageUpLo upLo,
45 IndexType n,
46 const ALPHA &alpha,
47 const VX *x, IndexType incX,
48 const VY *y, IndexType incY,
49 MA *A, IndexType ldA)
50 {
51 if (order==ColMajor) {
52 upLo = (upLo==Upper) ? Lower : Upper;
53 syr2_generic(RowMajor, upLo, n, alpha, y, incY, x, incX, A, ldA);
54 return;
55 }
56 #ifdef CXXBLAS_USE_XERBLA
57 // insert error check here
58 #endif
59 if (upLo==Upper) {
60 for (IndexType i=0, iX=0, iY=0; i<n; ++i, iX+=incX, iY+=incY) {
61 axpy_generic(n-i, alpha*x[iX], y+iY, incY,
62 A+i*(ldA+1), IndexType(1));
63 axpy_generic(n-i, alpha*y[iY], x+iX, incX,
64 A+i*(ldA+1), IndexType(1));
65 }
66 } else {
67 for (IndexType i=0, iX=0, iY=0; i<n; ++i, iX+=incX, iY+=incY) {
68 axpy_generic(i+1, alpha*x[iX], y, incY,
69 A+i*ldA, IndexType(1));
70 axpy_generic(i+1, alpha*y[iY], x, incX,
71 A+i*ldA, IndexType(1));
72 }
73 }
74 }
75
76 template <typename IndexType, typename ALPHA, typename VX, typename VY,
77 typename MA>
78 void
79 syr2(StorageOrder order, StorageUpLo upLo,
80 IndexType n,
81 const ALPHA &alpha,
82 const VX *x, IndexType incX,
83 const VY *y, IndexType incY,
84 MA *A, IndexType ldA)
85 {
86 CXXBLAS_DEBUG_OUT("syr2_generic");
87
88 if (incX<0) {
89 x -= incX*(n-1);
90 }
91 if (incY<0) {
92 y -= incY*(n-1);
93 }
94 syr2_generic(order, upLo, n, alpha, x, incX, y, incY, A, ldA);
95 }
96
97 } // namespace cxxblas
98
99 #endif // CXXBLAS_LEVEL2_SYR2_TCC
2 * Copyright (c) 2009, 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_LEVEL2_SYR2_TCC
34 #define CXXBLAS_LEVEL2_SYR2_TCC 1
35
36 #include <complex>
37 #include <cxxblas/level1/level1.h>
38
39 namespace cxxblas {
40
41 template <typename IndexType, typename ALPHA, typename VX, typename VY,
42 typename MA>
43 void
44 syr2_generic(StorageOrder order, StorageUpLo upLo,
45 IndexType n,
46 const ALPHA &alpha,
47 const VX *x, IndexType incX,
48 const VY *y, IndexType incY,
49 MA *A, IndexType ldA)
50 {
51 if (order==ColMajor) {
52 upLo = (upLo==Upper) ? Lower : Upper;
53 syr2_generic(RowMajor, upLo, n, alpha, y, incY, x, incX, A, ldA);
54 return;
55 }
56 #ifdef CXXBLAS_USE_XERBLA
57 // insert error check here
58 #endif
59 if (upLo==Upper) {
60 for (IndexType i=0, iX=0, iY=0; i<n; ++i, iX+=incX, iY+=incY) {
61 axpy_generic(n-i, alpha*x[iX], y+iY, incY,
62 A+i*(ldA+1), IndexType(1));
63 axpy_generic(n-i, alpha*y[iY], x+iX, incX,
64 A+i*(ldA+1), IndexType(1));
65 }
66 } else {
67 for (IndexType i=0, iX=0, iY=0; i<n; ++i, iX+=incX, iY+=incY) {
68 axpy_generic(i+1, alpha*x[iX], y, incY,
69 A+i*ldA, IndexType(1));
70 axpy_generic(i+1, alpha*y[iY], x, incX,
71 A+i*ldA, IndexType(1));
72 }
73 }
74 }
75
76 template <typename IndexType, typename ALPHA, typename VX, typename VY,
77 typename MA>
78 void
79 syr2(StorageOrder order, StorageUpLo upLo,
80 IndexType n,
81 const ALPHA &alpha,
82 const VX *x, IndexType incX,
83 const VY *y, IndexType incY,
84 MA *A, IndexType ldA)
85 {
86 CXXBLAS_DEBUG_OUT("syr2_generic");
87
88 if (incX<0) {
89 x -= incX*(n-1);
90 }
91 if (incY<0) {
92 y -= incY*(n-1);
93 }
94 syr2_generic(order, upLo, n, alpha, x, incX, y, incY, A, ldA);
95 }
96
97 } // namespace cxxblas
98
99 #endif // CXXBLAS_LEVEL2_SYR2_TCC