nuclei-sdk/NMSIS/NN/Include/riscv_nn_tables.h

/*
 * SPDX-FileCopyrightText: Copyright 2010-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
 * Copyright (c) 2019 Nuclei Limited. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the License); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* ----------------------------------------------------------------------
 * Project:      NMSIS NN Library
 * Title:        riscv_nn_tables.h
 * Description:  Extern declaration for NN tables
 *
 * $Date:        8 December 2022
 * $Revision:    V.2.1.1
 *
 * Target Processor:  RISC-V Cores
 * -------------------------------------------------------------------- */

#ifndef RISCV_NN_TABLES_H
#define RISCV_NN_TABLES_H

#include "riscv_nn_math_types.h"

/**
 * @brief tables for various activation functions
 *
 */

extern const uint16_t sigmoid_table_uint16[256];
extern const q15_t sigmoidTable_q15[256];
extern const q7_t sigmoidTable_q7[256];

extern const q7_t tanhTable_q7[256];
extern const q15_t tanhTable_q15[256];

/**
 * @brief 2-way tables for various activation functions
 *
 * 2-way table, H table for value larger than 1/4
 * L table for value smaller than 1/4, H table for remaining
 * We have this only for the q15_t version. It does not make
 * sense to have it for q7_t type
 */
extern const q15_t sigmoidHTable_q15[192];
extern const q15_t sigmoidLTable_q15[128];

#endif /*  RISCV_NN_TABLES_H */