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/******************************************************************************
* @file support_functions_f16.h
* @brief Public header file for CMSIS DSP Library
* @version V1.10.0
* @date 08 July 2021
* Target Processor: Cortex-M and Cortex-A cores
******************************************************************************/
/*
* Copyright (c) 2010-2020 Arm Limited or its affiliates. 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.
*/
#ifndef _SUPPORT_FUNCTIONS_F16_H_
#define _SUPPORT_FUNCTIONS_F16_H_
#include "arm_math_types_f16.h"
#include "arm_math_memory.h"
#include "dsp/none.h"
#include "dsp/utils.h"
#ifdef __cplusplus
extern "C"
{
#endif
#if defined(ARM_FLOAT16_SUPPORTED)
/**
* @brief Copies the elements of a floating-point vector.
* @param[in] pSrc input pointer
* @param[out] pDst output pointer
* @param[in] blockSize number of samples to process
*/
void arm_copy_f16(const float16_t * pSrc, float16_t * pDst, uint32_t blockSize);
/**
* @brief Fills a constant value into a floating-point vector.
* @param[in] value input value to be filled
* @param[out] pDst output pointer
* @param[in] blockSize number of samples to process
*/
void arm_fill_f16(float16_t value, float16_t * pDst, uint32_t blockSize);
/**
* @brief Converts the elements of the floating-point vector to Q31 vector.
* @param[in] pSrc points to the f16 input vector
* @param[out] pDst points to the q15 output vector
* @param[in] blockSize length of the input vector
*/
void arm_f16_to_q15(const float16_t * pSrc, q15_t * pDst, uint32_t blockSize);
/**
* @brief Converts the elements of the floating-point vector to Q31 vector.
* @param[in] pSrc points to the q15 input vector
* @param[out] pDst points to the f16 output vector
* @param[in] blockSize length of the input vector
*/
void arm_q15_to_f16(const q15_t * pSrc, float16_t * pDst, uint32_t blockSize);
/**
* @brief Converts the elements of the floating-point vector to Q31 vector.
* @param[in] pSrc points to the f32 input vector
* @param[out] pDst points to the f16 output vector
* @param[in] blockSize length of the input vector
*/
void arm_float_to_f16(const float32_t * pSrc, float16_t * pDst, uint32_t blockSize);
/**
* @brief Converts the elements of the floating-point vector to Q31 vector.
* @param[in] pSrc points to the f16 input vector
* @param[out] pDst points to the f32 output vector
* @param[in] blockSize length of the input vector
*/
void arm_f16_to_float(const float16_t * pSrc, float32_t * pDst, uint32_t blockSize);
/**
* @brief Weighted sum
*
*
* @param[in] *in Array of input values.
* @param[in] *weigths Weights
* @param[in] blockSize Number of samples in the input array.
* @return Weighted sum
*
*/
float16_t arm_weighted_sum_f16(const float16_t *in
, const float16_t *weigths
, uint32_t blockSize);
/**
* @brief Barycenter
*
*
* @param[in] in List of vectors
* @param[in] weights Weights of the vectors
* @param[out] out Barycenter
* @param[in] nbVectors Number of vectors
* @param[in] vecDim Dimension of space (vector dimension)
* @return None
*
*/
void arm_barycenter_f16(const float16_t *in
, const float16_t *weights
, float16_t *out
, uint32_t nbVectors
, uint32_t vecDim);
/**
@ingroup groupSupport
*/
/**
* @defgroup typecast Typecasting
*/
/**
@addtogroup typecast
@{
*/
/**
* @brief Interpret a f16 as an s16 value
* @param[in] x input value.
* @return return value.
*
* @par Description
* It is a typecast. No conversion of the float to int is done.
* The memcpy will be optimized out by the compiler.
* memcpy is used to prevent type punning issues.
* With gcc, -fno-builtins MUST not be used or the
* memcpy will not be optimized out.
*/
__STATIC_INLINE int16_t arm_typecast_s16_f16(float16_t x)
{
int16_t res;
res=*(int16_t*)memcpy((char*)&res,(char*)&x,sizeof(float16_t));
return(res);
}
/**
* @brief Interpret an s16 as an f16 value
* @param[in] x input value.
* @return return value.
*
* @par Description
* It is a typecast. No conversion of the int to float is done.
* The memcpy will be optimized out by the compiler.
* memcpy is used to prevent type punning issues.
* With gcc, -fno-builtins MUST not be used or the
* memcpy will not be optimized out.
*/
__STATIC_INLINE float16_t arm_typecast_f16_s16(int16_t x)
{
float16_t res;
res=*(float16_t*)memcpy((char*)&res,(char*)&x,sizeof(int16_t));
return(res);
}
/**
@} end of typecast group
*/
#endif /*defined(ARM_FLOAT16_SUPPORTED)*/
#ifdef __cplusplus
}
#endif
#endif /* ifndef _SUPPORT_FUNCTIONS_F16_H_ */
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