PLearn 0.1
LogAddVariable.h
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
00007 // Copyright (C) 2002 Xiangdong Wang, Christian Dorion
00008 
00009 // Redistribution and use in source and binary forms, with or without
00010 // modification, are permitted provided that the following conditions are met:
00011 // 
00012 //  1. Redistributions of source code must retain the above copyright
00013 //     notice, this list of conditions and the following disclaimer.
00014 // 
00015 //  2. Redistributions in binary form must reproduce the above copyright
00016 //     notice, this list of conditions and the following disclaimer in the
00017 //     documentation and/or other materials provided with the distribution.
00018 // 
00019 //  3. The name of the authors may not be used to endorse or promote
00020 //     products derived from this software without specific prior written
00021 //     permission.
00022 // 
00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 // 
00034 // This file is part of the PLearn library. For more information on the PLearn
00035 // library, go to the PLearn Web site at www.plearn.org
00036 
00037 
00038 /* *******************************************************      
00039  * $Id: LogAddVariable.h 8852 2008-04-21 20:54:19Z tihocan $
00040  * This file is part of the PLearn library.
00041  ******************************************************* */
00042 
00043 #ifndef LogAddVariable_INC
00044 #define LogAddVariable_INC
00045 
00046 #include "BinaryVariable.h"
00047 
00048 namespace PLearn {
00049 using namespace std;
00050 
00051 #ifdef __INTEL_COMPILER
00052 
00053 inline real logadd_for_icc(real a, real b) {
00054     return logadd(a, b);
00055 }
00056 #endif
00057 
00060 class LogAddVariable: public BinaryVariable
00061 {
00062     typedef BinaryVariable inherited;
00063 
00064 public:
00065 
00066     string vector_logadd;
00067 
00069     LogAddVariable();
00070 
00072     LogAddVariable(Variable* input1, Variable* input2,
00073                    const string& the_vector_logadd = "none",
00074                    bool call_build_ = true);
00075 
00076     PLEARN_DECLARE_OBJECT(LogAddVariable);
00077 
00078     virtual void build();
00079 
00080     virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00081 
00082     virtual void recomputeSize(int& l, int& w) const;  
00083     virtual void fprop();
00084     virtual void bprop();
00085     virtual void symbolicBprop();
00086 
00087 protected:
00088 
00093     int vector_logadd_id;
00094 
00096     Vec work;
00097 
00100     Vec work_ptr;
00101 
00102     static void declareOptions(OptionList & ol);
00103 
00104 private:
00105     void build_();
00106 };
00107 
00108 DECLARE_OBJECT_PTR(LogAddVariable);
00109 
00110 inline Var logadd(Var& input1, Var& input2)
00111 { return new LogAddVariable(input1, input2); }
00112 
00113 } // end of namespace PLearn
00114 
00115 #endif 
00116 
00117 
00118 /*
00119   Local Variables:
00120   mode:c++
00121   c-basic-offset:4
00122   c-file-style:"stroustrup"
00123   c-file-offsets:((innamespace . 0)(inline-open . 0))
00124   indent-tabs-mode:nil
00125   fill-column:79
00126   End:
00127 */
00128 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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