111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
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/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: arm_mse_f64.c
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* Description: Double floating point mean square error
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*
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* $Date: 05 April 2022
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* $Revision: V1.10.0
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*
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* Target Processor: Cortex-M and Cortex-A cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2022 ARM Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* 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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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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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, WITHOUT
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* 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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#include "dsp/statistics_functions.h"
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/**
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@ingroup groupStats
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*/
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/**
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@addtogroup MSE
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@{
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*/
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/**
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@brief Mean square error between two double floating point vectors.
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@param[in] pSrcA points to the first input vector
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@param[in] pSrcB points to the second input vector
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@param[in] blockSize number of samples in input vector
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@param[out] result mean square error
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@return none
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*/
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void arm_mse_f64(
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const float64_t * pSrcA,
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const float64_t * pSrcB,
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uint32_t blockSize,
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float64_t * result)
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{
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uint32_t blkCnt; /* Loop counter */
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float64_t inA, inB;
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float64_t sum = 0.0; /* Temporary return variable */
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#if defined (ARM_MATH_LOOPUNROLL)
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blkCnt = (blockSize) >> 1;
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while (blkCnt > 0U)
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{
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inA = *pSrcA++;
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inB = *pSrcB++;
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inA = inA - inB;
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sum += inA * inA;
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inA = *pSrcA++;
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inB = *pSrcB++;
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inA = inA - inB;
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sum += inA * inA;
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/* Decrement loop counter */
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blkCnt--;
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}
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/* Loop unrolling: Compute remaining outputs */
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blkCnt = (blockSize) & 1;
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#else
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/* Initialize blkCnt with number of samples */
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blkCnt = blockSize;
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#endif
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while (blkCnt > 0U)
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{
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inA = *pSrcA++;
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inB = *pSrcB++;
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inA = inA - inB;
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sum += inA * inA;
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/* Decrement loop counter */
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blkCnt--;
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}
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/* Store result in destination buffer */
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*result = sum / blockSize;
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}
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/**
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@} end of MSE group
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*/
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