source: Sophya/trunk/SophyaExt/Blitz/blitz/meta/dot.h@ 1036

Last change on this file since 1036 was 221, checked in by ansari, 26 years ago

Creation module DPC/Blitz (blitz 0.4) Reza 09/04/99
File size: 3.5 KB
Line 
1/***************************************************************************
2 * blitz/meta/dot.h Tiny vector dot product metaprogram
3 *
4 * $Id: dot.h,v 1.1.1.1 1999-04-09 17:59:03 ansari Exp $
5 *
6 * Copyright (C) 1997,1998 Todd Veldhuizen <tveldhui@seurat.uwaterloo.ca>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * Suggestions: blitz-suggest@cybervision.com
19 * Bugs: blitz-bugs@cybervision.com
20 *
21 * For more information, please see the Blitz++ Home Page:
22 * http://seurat.uwaterloo.ca/blitz/
23 *
24 ***************************************************************************
25 * $Log: not supported by cvs2svn $
26 * Revision 1.2 1998/03/14 00:08:44 tveldhui
27 * 0.2-alpha-05
28 *
29 * Revision 1.1 1997/07/16 14:51:20 tveldhui
30 * Update: Alpha release 0.2 (Arrays)
31 *
32 */
33
34#ifndef BZ_META_DOT_H
35#define BZ_META_DOT_H
36
37#ifndef BZ_PROMOTE_H
38 #include <blitz/promote.h>
39#endif
40
41#ifndef BZ_METAPROG_H
42 #include <blitz/meta/metaprog.h>
43#endif
44
45BZ_NAMESPACE(blitz)
46
47template<int N, int I>
48class _bz_meta_vectorDot {
49public:
50 enum { loopFlag = (I < N-1) ? 1 : 0 };
51
52 template<class T_expr1, class T_expr2>
53 static inline BZ_PROMOTE(_bz_typename T_expr1::T_numtype,
54 _bz_typename T_expr2::T_numtype)
55 f(const T_expr1& a, const T_expr2& b)
56 {
57 return a[I] * b[I]
58 + _bz_meta_vectorDot<loopFlag * N, loopFlag * (I+1)>::f(a,b);
59 }
60
61 template<class T_expr1, class T_expr2>
62 static inline BZ_PROMOTE(_bz_typename T_expr1::T_numtype,
63 _bz_typename T_expr2::T_numtype)
64 f_value_ref(T_expr1 a, const T_expr2& b)
65 {
66 return a[I] * b[I]
67 + _bz_meta_vectorDot<loopFlag * N, loopFlag * (I+1)>::f(a,b);
68 }
69
70 template<class T_expr1, class T_expr2>
71 static inline BZ_PROMOTE(_bz_typename T_expr1::T_numtype,
72 _bz_typename T_expr2::T_numtype)
73 f_ref_value(const T_expr1& a, T_expr2 b)
74 {
75 return a[I] * b[I]
76 + _bz_meta_vectorDot<loopFlag * N, loopFlag * (I+1)>::f(a,b);
77 }
78
79 template<class T_expr1, class P_numtype2>
80 static inline BZ_PROMOTE(_bz_typename T_expr1::T_numtype,
81 P_numtype2)
82 dotWithArgs(const T_expr1& a, P_numtype2 i1, P_numtype2 i2=0,
83 P_numtype2 i3=0, P_numtype2 i4=0, P_numtype2 i5=0, P_numtype2 i6=0,
84 P_numtype2 i7=0, P_numtype2 i8=0, P_numtype2 i9=0, P_numtype2 i10=0)
85 {
86 return a[I] * i1
87 + _bz_meta_vectorDot<loopFlag * N, loopFlag * (I+1)>::dotWithArgs
88 (a, i2, i3, i4, i5, i6, i7, i8, i9);
89 }
90};
91
92template<>
93class _bz_meta_vectorDot<0,0> {
94public:
95 template<class T_expr1, class T_expr2>
96 static inline _bz_meta_nullOperand f(const T_expr1&, const T_expr2&)
97 { return _bz_meta_nullOperand(); }
98
99 template<class T_expr1, class P_numtype2>
100 static inline _bz_meta_nullOperand
101 dotWithArgs(const T_expr1& a, P_numtype2 i1, P_numtype2 i2=0,
102 P_numtype2 i3=0, P_numtype2 i4=0, P_numtype2 i5=0, P_numtype2 i6=0,
103 P_numtype2 i7=0, P_numtype2 i8=0, P_numtype2 i9=0, P_numtype2 i10=0)
104 {
105 return _bz_meta_nullOperand();
106 }
107
108};
109
110BZ_NAMESPACE_END
111
112#endif // BZ_META_DOT_H
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