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 <cmath>
10
11 #include <executorch/kernels/portable/cpu/util/functional_util.h>
12 #include <executorch/runtime/kernel/kernel_includes.h>
13 #include <executorch/runtime/platform/assert.h>
14
15 namespace torch {
16 namespace executor {
17 namespace native {
18
19 using Tensor = exec_aten::Tensor;
20 using ScalarType = exec_aten::ScalarType;
21
relu_out(KernelRuntimeContext & ctx,const Tensor & in,Tensor & out)22 Tensor& relu_out(KernelRuntimeContext& ctx, const Tensor& in, Tensor& out) {
23 (void)ctx;
24
25 // Resize for dynamic shape
26 ET_KERNEL_CHECK_MSG(
27 ctx,
28 resize_tensor(out, in.sizes()) == Error::Ok,
29 InvalidArgument,
30 out,
31 "Failed to resize output tensor.");
32
33 ET_KERNEL_CHECK(
34 ctx, tensors_have_same_shape_and_dtype(in, out), InvalidArgument, out);
35
36 ET_KERNEL_CHECK(ctx, tensor_is_real_type(out), InvalidArgument, out);
37
38 ET_KERNEL_CHECK(
39 ctx, tensors_have_same_dim_order(in, out), InvalidArgument, out);
40
41 ET_SWITCH_REAL_TYPES(in.scalar_type(), ctx, "relu.out", CTYPE, [&]() {
42 apply_unary_map_fn(
43 [](const CTYPE val_in) {
44 return (std::isnan(val_in) || val_in >= CTYPE(0)) ? val_in : CTYPE(0);
45 },
46 in.const_data_ptr<CTYPE>(),
47 out.mutable_data_ptr<CTYPE>(),
48 in.numel());
49 });
50
51 return out;
52 }
53
54 } // namespace native
55 } // namespace executor
56 } // namespace torch
57