mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-31 09:52:05 -07:00
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
|
|
/* ----------------------------------------------------------------------
|
|
* Project: CMSIS DSP Library
|
|
* Title: arm_cosine_distance_f64.c
|
|
* Description: Cosine distance between two vectors
|
|
*
|
|
* $Date: 13 September 2021
|
|
* $Revision: V1.10.0
|
|
*
|
|
* Target Processor: Cortex-M and Cortex-A cores
|
|
* -------------------------------------------------------------------- */
|
|
/*
|
|
* Copyright (C) 2010-2021 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.
|
|
*/
|
|
|
|
#include "dsp/distance_functions.h"
|
|
#include <limits.h>
|
|
#include <math.h>
|
|
|
|
|
|
/**
|
|
@addtogroup CosineDist
|
|
@{
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
* @brief Cosine distance between two vectors
|
|
*
|
|
* @param[in] pA First vector
|
|
* @param[in] pB Second vector
|
|
* @param[in] blockSize vector length
|
|
* @return distance
|
|
*
|
|
*/
|
|
|
|
float64_t arm_cosine_distance_f64(const float64_t *pA,const float64_t *pB, uint32_t blockSize)
|
|
{
|
|
float64_t pwra,pwrb,dot,tmp;
|
|
|
|
arm_power_f64(pA, blockSize, &pwra);
|
|
arm_power_f64(pB, blockSize, &pwrb);
|
|
|
|
arm_dot_prod_f64(pA,pB,blockSize,&dot);
|
|
|
|
tmp = sqrt(pwra * pwrb);
|
|
return(1. - dot / tmp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* @} end of CosineDist group
|
|
*/
|