1 /*
2 * Copyright (c) Meta Platforms, Inc. and affiliates.
3 * All rights reserved.
4 *
5 * This source code is licensed under the BSD-style license found in the
6 * LICENSE file in the root directory of this source tree.
7 */
8
9 #include <cstring>
10
11 #include <executorch/runtime/kernel/kernel_includes.h>
12
13 namespace torch {
14 namespace executor {
15 namespace native {
16
17 using Tensor = exec_aten::Tensor;
18
19 Tensor&
lift_fresh_copy_out(KernelRuntimeContext & ctx,const Tensor & in,Tensor & out)20 lift_fresh_copy_out(KernelRuntimeContext& ctx, const Tensor& in, Tensor& out) {
21 (void)ctx;
22
23 ET_KERNEL_CHECK(ctx, tensors_have_same_dtype(in, out), InvalidArgument, out);
24
25 ET_KERNEL_CHECK(
26 ctx, resize_tensor(out, in.sizes()) == Error::Ok, InvalidArgument, out);
27
28 ET_KERNEL_CHECK(
29 ctx, tensors_have_same_dim_order(in, out), InvalidArgument, out);
30
31 if (in.nbytes() > 0) {
32 // Note that this check is important. It's valid for a tensor with numel 0
33 // to have a null data pointer, but in some environments it's invalid to
34 // pass a null pointer to memcpy() even when the size is zero.
35 memcpy(out.mutable_data_ptr(), in.const_data_ptr(), in.nbytes());
36 }
37 return out;
38 }
39
40 } // namespace native
41 } // namespace executor
42 } // namespace torch
43