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#ifndef TH_GENERIC_FILE
#define TH_GENERIC_FILE "generic/LogSigmoid.c"
#else
void THNN_(LogSigmoid_updateOutput)(
THNNState *state,
THTensor *input,
THTensor *output,
THTensor *buffer)
{
THTensor_(resizeAs)(output, input);
THTensor_(resizeAs)(buffer, input);
TH_TENSOR_APPLY3(real, output, real, input, real, buffer,
real z = exp(-*input_data);
*buffer_data = z;
*output_data = -log(1. + z);
);
}
void THNN_(LogSigmoid_updateGradInput)(
THNNState *state,
THTensor *input,
THTensor *gradOutput,
THTensor *gradInput,
THTensor *buffer)
{
THNN_CHECK_NELEMENT(input, gradOutput);
THTensor_(resizeAs)(gradInput, buffer);
TH_TENSOR_APPLY3(real, gradInput, real, gradOutput, real, buffer,
real z = *buffer_data;
*gradInput_data = *gradOutput_data * z / (1. + z);
);
}
#endif
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