1 | /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. |
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. |
14 | ==============================================================================*/ |
15 | |
16 | #include "tensorflow/tsl/platform/setround.h" |
17 | |
18 | #include "tensorflow/tsl/platform/logging.h" |
19 | |
20 | namespace tsl { |
21 | namespace port { |
22 | |
23 | #if defined(TF_BROKEN_CFENV) |
24 | |
25 | ScopedSetRound::ScopedSetRound(const int mode) : original_mode_(mode) { |
26 | // If cfenv usage is broken, assume support only for TONEAREST. |
27 | DCHECK_EQ(mode, FE_TONEAREST); |
28 | } |
29 | |
30 | ScopedSetRound::~ScopedSetRound() {} |
31 | |
32 | #else |
33 | |
34 | ScopedSetRound::ScopedSetRound(const int mode) { |
35 | original_mode_ = std::fegetround(); |
36 | if (original_mode_ < 0) { |
37 | // Failed to get current mode, assume ROUND TO NEAREST. |
38 | original_mode_ = FE_TONEAREST; |
39 | } |
40 | std::fesetround(mode); |
41 | } |
42 | |
43 | ScopedSetRound::~ScopedSetRound() { std::fesetround(original_mode_); } |
44 | |
45 | #endif // TF_BROKEN_CFENV |
46 | |
47 | } // namespace port |
48 | } // namespace tsl |
49 | |