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#ifndef TH_GENERIC_FILE
#define TH_GENERIC_FILE "generic/Sqrt.c"
#else
void THNN_(Sqrt_updateOutput)(
THNNState *state,
THTensor *input,
THTensor *output,
accreal eps_)
{
real eps = TH_CONVERT_ACCREAL_TO_REAL(eps_);
THTensor_(resizeAs)(output, input);
THTensor_(sqrt)(output, input);
}
void THNN_(Sqrt_updateGradInput)(
THNNState *state,
THTensor *input,
THTensor *gradOutput,
THTensor *gradInput,
THTensor *output)
{
THNN_CHECK_SHAPE(output, gradOutput);
THTensor_(resizeAs)(gradInput, input);
if (output->nDimension == 1 ||
!THTensor_(isContiguous)(output) ||
!THTensor_(isContiguous)(gradOutput) ||
!THTensor_(isContiguous)(gradInput))
{
TH_TENSOR_APPLY3(real, gradInput, real, gradOutput, real, output,
*gradInput_data = (*output_data == 0.0) ? 0.0 : (0.5 * (*gradOutput_data / *output_data));
);
}
else
{
real *gradOutput_data = THTensor_(data)(gradOutput);
real *gradInput_data = THTensor_(data)(gradInput);
real *output_data = THTensor_(data)(output);
long i;
#pragma omp parallel for private(i)
for(i = 0; i < THTensor_(nElement)(output); i++)
{
if (output_data[i] == 0.0)
gradInput_data[i] = 0.0;
else
gradInput_data[i] = 0.5 * (gradOutput_data[i] / output_data[i]);
}
}
}
#endif
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