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 <executorch/kernels/portable/cpu/util/kernel_ops_util.h>
10 #include <executorch/kernels/portable/cpu/util/reduce_util.h>
11 #include <executorch/runtime/kernel/kernel_includes.h>
12 #include <executorch/runtime/platform/assert.h>
13
14 namespace torch {
15 namespace executor {
16 namespace native {
17
18 using Tensor = exec_aten::Tensor;
19 using ScalarType = exec_aten::ScalarType;
20
mean_dim_out(KernelRuntimeContext & ctx,const Tensor & in,optional<ArrayRef<int64_t>> dim_list,bool keepdim,optional<ScalarType> dtype,Tensor & out)21 Tensor& mean_dim_out(
22 KernelRuntimeContext& ctx,
23 const Tensor& in,
24 optional<ArrayRef<int64_t>> dim_list,
25 bool keepdim,
26 optional<ScalarType> dtype,
27 Tensor& out) {
28 (void)ctx;
29
30 ET_KERNEL_CHECK(
31 ctx,
32 check_mean_dim_args(in, dim_list, keepdim, dtype, out),
33 InvalidArgument,
34 out);
35
36 ET_KERNEL_CHECK(
37 ctx, tensors_have_same_dim_order(in, out), InvalidArgument, out);
38
39 ET_KERNEL_CHECK(ctx, tensor_is_default_dim_order(in), InvalidArgument, out);
40
41 ET_KERNEL_CHECK(
42 ctx,
43 resize_reduction_out(in, dim_list, keepdim, out) == Error::Ok,
44 InvalidArgument,
45 out);
46
47 ET_SWITCH_REALHB_TYPES(in.scalar_type(), ctx, "mean.out", CTYPE_IN, [&] {
48 ET_SWITCH_FLOATH_TYPES(out.scalar_type(), ctx, "mean.out", CTYPE_OUT, [&] {
49 CTYPE_OUT* out_data = out.mutable_data_ptr<CTYPE_OUT>();
50 const size_t num = get_reduced_dim_product(in, dim_list);
51 for (size_t out_ix = 0; out_ix < out.numel(); ++out_ix) {
52 CTYPE_OUT sum = 0;
53 if (in.numel() > 0) {
54 sum = map_reduce_over_dim_list<CTYPE_IN, CTYPE_OUT>(
55 [](CTYPE_IN v) { return static_cast<CTYPE_OUT>(v); },
56 [](CTYPE_OUT outv, CTYPE_OUT acc) { return acc + outv; },
57 in,
58 dim_list,
59 out_ix);
60 }
61 out_data[out_ix] = sum / static_cast<float>(num);
62 }
63 });
64 });
65
66 return out;
67 }
68
69 } // namespace native
70 } // namespace executor
71 } // namespace torch
72