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/* backprop */
if (input.ndimension() == 4) /* non-batch mode*/
{
AT_DISPATCH_FLOATING_TYPES(input.scalar_type(),
"max_pool3d_with_indices_backward",
[&] {
/* get raw pointers */
scalar_t *gradInput_data = gradInput.data_ptr<scalar_t>();
scalar_t *gradOutput_data = gradOutput.data_ptr<scalar_t>();
int64_t *indices_data = indices.data_ptr<int64_t>();
max_pool3d_with_indices_backward_single_out_frame(
gradInput_data, gradOutput_data,
indices_data,
nslices,
itime, iwidth, iheight,
otime, owidth, oheight,
dT, dW, dH,
pT, pW, pH,
dilationT, dilationW, dilationH);
}
);
}
else /* batch mode */
{
const int64_t nbatch = input.size(0);
const int64_t istride = nslices * itime * iwidth * iheight;
const int64_t ostride = nslices * otime * owidth * oheight;
AT_DISPATCH_FLOATING_TYPES(input.scalar_type(),
"max_pool3d_with_indices_backward",
[&] {
scalar_t *gradInput_data = gradInput.data_ptr<scalar_t>();
scalar_t *gradOutput_data = gradOutput.data_ptr<scalar_t>();
int64_t *indices_data = indices.data_ptr<int64_t>();
max_pool3d_with_indices_backward_out_frame<scalar_t>(
gradInput_data,
gradOutput_data,
indices_data,
nbatch,
nslices,
istride, ostride,
itime, iwidth, iheight,
otime, owidth, oheight,
dT, dW, dH,
pT, pW, pH,
dilationT, dilationW, dilationH);
}
);
}
return gradInput;
}
} // namespace
std::tuple<Tensor&, Tensor&> max_pool3d_with_indices_out_cpu(const Tensor& input,
IntArrayRef kernel_size,
IntArrayRef stride,
IntArrayRef padding,
IntArrayRef dilation,
bool ceil_mode,
Tensor& output,
Tensor& indices)
{
max_pool3d_with_indices_out_cpu_template(
output,
indices,
input,
kernel_size,
stride,
padding,
dilation,
ceil_mode);
return std::tuple<Tensor&, Tensor&>(output, indices);
}
std::tuple<Tensor, Tensor> max_pool3d_with_indices_cpu(
const Tensor& input,
IntArrayRef kernel_size,
IntArrayRef stride,
IntArrayRef padding,
IntArrayRef dilation,
bool ceil_mode)
{
NoNamesGuard guard;
Tensor output = at::empty({0}, input.options());
Tensor indices = at::empty({0}, input.options().dtype(kLong));
max_pool3d_with_indices_out_cpu_template(
output,
indices,
input,
kernel_size,
stride,
padding,
dilation,
ceil_mode);