1 /* Copyright 2019 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 #ifndef TENSORFLOW_COMPILER_TF2XLA_KERNELS_RANDOM_OPS_UTIL_H_ 17 #define TENSORFLOW_COMPILER_TF2XLA_KERNELS_RANDOM_OPS_UTIL_H_ 18 19 #include <cmath> 20 21 #include "tensorflow/compiler/xla/client/xla_builder.h" 22 #include "tensorflow/core/framework/tensor.h" 23 24 namespace tensorflow { 25 26 // Converts to bfloat16 if `dtype` equals DT_BFLOAT16, no-op otherwise. 27 // It masks the last 16 bit. With normal rounding, values near "maxval" would be 28 // converted to "maxval" which is out of range ["minval", "maxval"). In 29 // addition, the distribution near the limit is not uniform. 30 xla::XlaOp MaybeConvertF32ToBF16(xla::XlaOp input, DataType dtype); 31 32 } // namespace tensorflow 33 34 #endif // TENSORFLOW_COMPILER_TF2XLA_KERNELS_RANDOM_OPS_UTIL_H_ 35