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Handle copy() operation directly. #351

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Merged
merged 1 commit into from
Feb 26, 2019
+13 −0
Merged

Handle copy() operation directly. #351

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10 changes: 10 additions & 0 deletions torch_xla/csrc/aten_xla_type.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,16 @@ int64_t AtenXlaType::numel(const at::Tensor& self) const {
return xla::ShapeUtil::ElementsIn(self_tensor.shape());
}

at::Tensor AtenXlaType::copy(const at::Tensor& src, bool /* non_blocking */,
at::optional<c10::Device> to_device) const {
std::vector<at::Tensor> tensors = {src};
std::vector<bool> writeables = {false};
auto xla_tensors = bridge::XlaCreateTensorList(tensors, &writeables);
Device device = to_device ? bridge::AtenDeviceToXlaDevice(*to_device)
: *GetDefaultDevice();
return bridge::CreateXlaTensor(xla_tensors.front(), device);
}

at::Tensor AtenXlaType::_s_copy_from(const at::Tensor& self,
const at::Tensor& dst,
bool /* non_blocking */) const {
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3 changes: 3 additions & 0 deletions torch_xla/csrc/aten_xla_type.h
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Expand Up @@ -11,6 +11,9 @@ class AtenXlaType : public AtenXlaTypeBase {

int64_t numel(const at::Tensor& self) const override;

at::Tensor copy(const at::Tensor& src, bool non_blocking,
at::optional<c10::Device> to_device) const override;

at::Tensor _s_copy_from(const at::Tensor& self, const at::Tensor& dst,
bool non_blocking) const override;

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