1/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16// Kernels of the StatelessShuffle op.
17
18#include <tuple>
19
20#include "tensorflow/core/framework/register_types.h"
21#include "tensorflow/core/kernels/random_ops_util.h"
22#include "tensorflow/core/kernels/shuffle_common.h"
23#include "tensorflow/core/kernels/stateless_random_ops_v2_util.h"
24
25namespace tensorflow {
26
27template <typename T>
28class StatelessShuffleOp : public OpKernel {
29 public:
30 explicit StatelessShuffleOp(OpKernelConstruction* ctx)
31 : OpKernel(ctx) {}
32
33 void Compute(OpKernelContext* ctx) override {
34 const Tensor& input = ctx->input(0);
35 OP_REQUIRES_VALUE(auto key_counter_alg, ctx,
36 GetKeyCounterAlgFromInputs(ctx, 1, 2, 3));
37 auto key_t = std::get<0>(key_counter_alg);
38 auto counter_t = std::get<1>(key_counter_alg);
39 auto alg = std::get<2>(key_counter_alg);
40
41 if (alg != RNG_ALG_PHILOX) {
42 OP_REQUIRES(ctx, false,
43 errors::InvalidArgument("Unsupported algorithm id: ", alg));
44 }
45
46 auto rng = GetPhiloxRandomFromCounterKeyMem(counter_t.flat<uint64>().data(),
47 key_t.flat<uint64>().data());
48 auto get_rng = [rng](auto num_samples) { return rng; };
49 OP_REQUIRES_OK(ctx,
50 RandomShuffle<T>(ctx, input, /*output_idx=*/0, get_rng));
51 }
52};
53
54#define REGISTER(T) \
55 REGISTER_KERNEL_BUILDER(Name("StatelessShuffle") \
56 .Device(DEVICE_CPU) \
57 .TypeConstraint<T>("T"), \
58 StatelessShuffleOp<T>);
59
60TF_CALL_ALL_TYPES(REGISTER)
61
62#undef REGISTER
63
64} // namespace tensorflow
65