/usr/include/torch/SoftMax.h is in libtorch3-dev 3.1-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This file is part of Torch 3.1.
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#ifndef SOFT_MAX_INC
#define SOFT_MAX_INC
#include "GradientMachine.h"
namespace Torch {
/** SoftMax layer for #GradientMachine#.
The number of inputs/outputs is the number
of units in the machine.
Formally speaking, $ouputs[i] = 1/a * exp(inputs[i]-shift)$
where $a = \sum_j exp(inputs[j]-shift)$.
Options:
\begin{tabular}{lcll}
"shift" & real & shift to avoid overflow & [0]\\
"compute shift" & bool & compute shift to avoid overflow & [false]
\end{tabular}
(you can have the "shift" you want, if you want, or
you can automatically compute the shift)
@author Ronan Collobert (collober@idiap.ch)
*/
class SoftMax : public GradientMachine
{
public:
real shift;
bool calc_shift;
//-----
/// Create a layer with #n_units# units.
SoftMax(int n_units);
//-----
virtual void frameForward(int t, real *f_inputs, real *f_outputs);
virtual void frameBackward(int t, real *f_inputs, real *beta_, real *f_outputs, real *alpha_);
virtual ~SoftMax();
};
}
#endif
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