2 * Copyright (c) 2021 Samsung Electronics Co., Ltd. All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef LUCI_INTERPRETER_PAL_SOFTMAX_H
18 #define LUCI_INTERPRETER_PAL_SOFTMAX_H
20 #include <tensorflow/lite/kernels/internal/reference/softmax.h>
21 #include <arm_nnfunctions.h>
23 namespace luci_interpreter_pal
25 static inline void PopulateSoftmaxLookupTable(tflite::SoftmaxParams *data, float input_scale,
34 static inline void InitializeParams(tflite::SoftmaxParams *params, float input_scale, float beta)
36 int32 input_beta_multiplier;
37 int input_beta_left_shift;
38 static const int kScaledDiffIntegerBits = 5;
39 tflite::PreprocessSoftmaxScaling(beta, input_scale, kScaledDiffIntegerBits,
40 &input_beta_multiplier, &input_beta_left_shift);
42 params->input_multiplier = input_beta_multiplier;
43 params->input_left_shift = input_beta_left_shift;
45 -tflite::CalculateInputRadius(kScaledDiffIntegerBits, params->input_left_shift);
49 static inline void Softmax(const tflite::SoftmaxParams ¶ms,
50 const tflite::RuntimeShape &input_shape, const T *input_data,
51 const tflite::RuntimeShape &output_shape, T *output_data)
53 // MARK: At this moment this operation doesn't support on mcu
54 assert(false && "Softmax NYI");
63 inline void Softmax<int8_t>(const tflite::SoftmaxParams ¶ms,
64 const tflite::RuntimeShape &input_shape, const int8_t *input_data,
65 const tflite::RuntimeShape &output_shape, int8_t *output_data)
67 const int trailing_dim = input_shape.DimensionsCount() - 1;
68 const int outer_size = tflite::MatchingFlatSizeSkipDim(input_shape, trailing_dim, output_shape);
69 const int depth = tflite::MatchingDim(input_shape, trailing_dim, output_shape, trailing_dim);
70 const int32_t mult = params.input_multiplier;
71 const int32_t shift = params.input_left_shift;
72 const int32_t diff_min = params.diff_min;
74 arm_softmax_s8(input_data, outer_size, depth, mult, shift, diff_min, output_data);
76 } // namespace luci_interpreter_pal
78 #endif // LUCI_INTERPRETER_PAL_SOFTMAX_H