You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/* ----------------------------------------------------------------------
|
|
* Project: CMSIS DSP Library
|
|
* Title: arm_absmin_no_idx_f64.c
|
|
* Description: Minimum value of absolute values of a floating-point vector
|
|
*
|
|
* $Date: 10 August 2022
|
|
* $Revision: V1.10.1
|
|
*
|
|
* 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/statistics_functions.h"
|
|
|
|
/**
|
|
@ingroup groupStats
|
|
*/
|
|
|
|
/**
|
|
@addtogroup AbsMin
|
|
@{
|
|
*/
|
|
|
|
/**
|
|
@brief Minimum value of absolute values of a floating-point vector.
|
|
@param[in] pSrc points to the input vector
|
|
@param[in] blockSize number of samples in input vector
|
|
@param[out] pResult minimum value returned here
|
|
@return none
|
|
*/
|
|
|
|
#if defined(ARM_MATH_NEON) && defined(__aarch64__)
|
|
void arm_absmin_no_idx_f64(
|
|
const float64_t * pSrc,
|
|
uint32_t blockSize,
|
|
float64_t * pResult)
|
|
{
|
|
float64_t minVal , in; /* Temporary variables to store the output value. */
|
|
uint32_t blkCnt; /* Loop counter */
|
|
|
|
float64x2_t minV;
|
|
float64x2_t pSrcV ;
|
|
pSrcV = vld1q_f64(pSrc);
|
|
pSrc += 2 ;
|
|
minV = vabsq_f64(pSrcV);
|
|
|
|
|
|
|
|
|
|
/* Load first input value that act as reference value for comparision */
|
|
|
|
|
|
/* Initialize blkCnt with number of samples */
|
|
blkCnt = (blockSize - 2U) >> 1U;
|
|
|
|
while (blkCnt > 0U)
|
|
{
|
|
/* Initialize maxVal to the next consecutive values one by one */
|
|
pSrcV = vld1q_f64(pSrc);
|
|
minV = vminq_f64(minV, vabsq_f64(pSrcV));
|
|
|
|
pSrc += 2 ;
|
|
|
|
/* Decrement loop counter */
|
|
blkCnt--;
|
|
}
|
|
minVal =vgetq_lane_f64(minV, 0);
|
|
if(minVal > vgetq_lane_f64(minV, 1))
|
|
{
|
|
minVal = vgetq_lane_f64(minV, 1);
|
|
}
|
|
blkCnt = (blockSize - 2U) & 1;
|
|
|
|
while (blkCnt > 0U)
|
|
{
|
|
/* Initialize maxVal to the next consecutive values one by one */
|
|
in = fabs(*pSrc++);
|
|
|
|
/* compare for the maximum value */
|
|
if (minVal > in)
|
|
{
|
|
/* Update the maximum value and it's index */
|
|
minVal = in;
|
|
}
|
|
|
|
/* Decrement loop counter */
|
|
blkCnt--;
|
|
}
|
|
*pResult = minVal;
|
|
|
|
|
|
/* Store the maximum value and it's index into destination pointers */
|
|
|
|
}
|
|
#else
|
|
void arm_absmin_no_idx_f64(
|
|
const float64_t * pSrc,
|
|
uint32_t blockSize,
|
|
float64_t * pResult)
|
|
{
|
|
float64_t minVal, out; /* Temporary variables to store the output value. */
|
|
uint32_t blkCnt; /* Loop counter */
|
|
|
|
|
|
/* Load first input value that act as reference value for comparision */
|
|
out = fabs(*pSrc++);
|
|
|
|
/* Initialize blkCnt with number of samples */
|
|
blkCnt = (blockSize - 1U);
|
|
|
|
while (blkCnt > 0U)
|
|
{
|
|
/* Initialize minVal to the next consecutive values one by one */
|
|
minVal = fabs(*pSrc++);
|
|
|
|
/* compare for the minimum value */
|
|
if (out > minVal)
|
|
{
|
|
/* Update the minimum value and it's index */
|
|
out = minVal;
|
|
}
|
|
|
|
/* Decrement loop counter */
|
|
blkCnt--;
|
|
}
|
|
|
|
/* Store the minimum value and it's index into destination pointers */
|
|
*pResult = out;
|
|
}
|
|
#endif
|
|
/**
|
|
@} end of AbsMin group
|
|
*/
|