f24d25d860
This CL renames `kTfLiteActRelu1` to `kTfLiteActReluN1To1` because it has minimum clipping at -1, not 0. Also, This CL finishes renaming because TFLite already uses `kTfLiteBuiltinReluN1To1`, `ActivationFunctionType_RELU_N1_TO_1` for this op. PiperOrigin-RevId: 317589358 Change-Id: I2424104da45234346749b3921d563e9161e809cc
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_LITE_MICRO_KERNELS_ACTIVATION_UTILS_H_
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#define TENSORFLOW_LITE_MICRO_KERNELS_ACTIVATION_UTILS_H_
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#include <algorithm>
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#include <cmath>
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#include "tensorflow/lite/c/builtin_op_data.h"
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#include "tensorflow/lite/kernels/internal/cppmath.h"
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#include "tensorflow/lite/kernels/internal/max.h"
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#include "tensorflow/lite/kernels/internal/min.h"
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namespace tflite {
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namespace ops {
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namespace micro {
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// Returns the floating point value for a fused activation:
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inline float ActivationValFloat(TfLiteFusedActivation act, float a) {
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switch (act) {
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case kTfLiteActNone:
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return a;
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case kTfLiteActRelu:
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return TfLiteMax(0.0f, a);
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case kTfLiteActReluN1To1:
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return TfLiteMax(-1.0f, TfLiteMin(a, 1.0f));
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case kTfLiteActRelu6:
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return TfLiteMax(0.0f, TfLiteMin(a, 6.0f));
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case kTfLiteActTanh:
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return std::tanh(a);
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case kTfLiteActSignBit:
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return std::signbit(a);
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case kTfLiteActSigmoid:
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return 1.0f / (1.0f + std::exp(-a));
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}
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return 0.0f; // To indicate an unsupported activation (i.e. when a new fused
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// activation is added to the enum and not handled here).
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}
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} // namespace micro
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} // namespace ops
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} // namespace tflite
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#endif // TENSORFLOW_LITE_MICRO_KERNELS_ACTIVATION_UTILS_H_
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