Camera_driver: initialize project and libraries
This commit is contained in:
Petr Malanik
@ -0,0 +1,16 @@
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cmake_minimum_required (VERSION 3.6)
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project(CMSISDSPStatistics)
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file(GLOB SRC "./*_*.c")
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add_library(CMSISDSPStatistics STATIC ${SRC})
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configdsp(CMSISDSPStatistics ..)
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### Includes
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target_include_directories(CMSISDSPStatistics PUBLIC "${DSP}/../../Include")
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@ -0,0 +1,53 @@
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/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: StatisticsFunctions.c
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* Description: Combination of all statistics function source files.
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*
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* $Date: 18. March 2019
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* $Revision: V1.0.0
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*
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* Target Processor: Cortex-M cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2019 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 "arm_max_f32.c"
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#include "arm_max_q15.c"
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#include "arm_max_q31.c"
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#include "arm_max_q7.c"
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#include "arm_mean_f32.c"
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#include "arm_mean_q15.c"
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#include "arm_mean_q31.c"
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#include "arm_mean_q7.c"
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#include "arm_min_f32.c"
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#include "arm_min_q15.c"
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#include "arm_min_q31.c"
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#include "arm_min_q7.c"
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#include "arm_power_f32.c"
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#include "arm_power_q15.c"
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#include "arm_power_q31.c"
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#include "arm_power_q7.c"
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#include "arm_rms_f32.c"
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#include "arm_rms_q15.c"
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#include "arm_rms_q31.c"
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#include "arm_std_f32.c"
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#include "arm_std_q15.c"
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#include "arm_std_q31.c"
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#include "arm_var_f32.c"
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#include "arm_var_q15.c"
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#include "arm_var_q31.c"
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@ -0,0 +1,271 @@
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/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: arm_max_f32.c
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* Description: Maximum value of a floating-point vector
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*
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* $Date: 18. March 2019
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* $Revision: V1.6.0
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*
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* Target Processor: Cortex-M cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2019 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 "arm_math.h"
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#if defined(ARM_MATH_NEON)
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#include <limits.h>
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#endif
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/**
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@ingroup groupStats
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*/
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/**
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@defgroup Max Maximum
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Computes the maximum value of an array of data.
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The function returns both the maximum value and its position within the array.
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There are separate functions for floating-point, Q31, Q15, and Q7 data types.
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*/
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/**
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@addtogroup Max
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@{
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*/
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/**
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@brief Maximum value of a floating-point vector.
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@param[in] pSrc points to the input vector
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@param[in] blockSize number of samples in input vector
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@param[out] pResult maximum value returned here
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@param[out] pIndex index of maximum value returned here
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@return none
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*/
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#if defined(ARM_MATH_NEON)
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void arm_max_f32(
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const float32_t * pSrc,
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uint32_t blockSize,
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float32_t * pResult,
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uint32_t * pIndex)
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{
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float32_t maxVal1, maxVal2, out; /* Temporary variables to store the output value. */
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uint32_t blkCnt, outIndex, count; /* loop counter */
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float32x4_t outV, srcV;
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float32x2_t outV2;
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uint32x4_t idxV;
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uint32x4_t maxIdx={ULONG_MAX,ULONG_MAX,ULONG_MAX,ULONG_MAX};
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uint32x4_t index={4,5,6,7};
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uint32x4_t delta={4,4,4,4};
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uint32x4_t countV={0,1,2,3};
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uint32x2_t countV2;
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/* Initialise the count value. */
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count = 0U;
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/* Initialise the index value to zero. */
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outIndex = 0U;
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/* Load first input value that act as reference value for comparison */
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if (blockSize <= 3)
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{
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out = *pSrc++;
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blkCnt = blockSize - 1;
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while (blkCnt > 0U)
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{
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/* Initialize maxVal to the next consecutive values one by one */
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maxVal1 = *pSrc++;
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/* compare for the maximum value */
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if (out < maxVal1)
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{
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/* Update the maximum value and it's index */
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out = maxVal1;
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outIndex = blockSize - blkCnt;
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}
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/* Decrement the loop counter */
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blkCnt--;
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}
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}
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else
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{
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outV = vld1q_f32(pSrc);
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pSrc += 4;
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/* Compute 4 outputs at a time */
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blkCnt = (blockSize - 4 ) >> 2U;
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while (blkCnt > 0U)
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{
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srcV = vld1q_f32(pSrc);
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pSrc += 4;
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idxV = vcgtq_f32(srcV, outV);
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outV = vbslq_f32(idxV, srcV, outV );
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countV = vbslq_u32(idxV, index,countV );
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index = vaddq_u32(index,delta);
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/* Decrement the loop counter */
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blkCnt--;
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}
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outV2 = vpmax_f32(vget_low_f32(outV),vget_high_f32(outV));
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outV2 = vpmax_f32(outV2,outV2);
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out = outV2[0];
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idxV = vceqq_f32(outV, vdupq_n_f32(out));
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countV = vbslq_u32(idxV, countV,maxIdx);
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countV2 = vpmin_u32(vget_low_u32(countV),vget_high_u32(countV));
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countV2 = vpmin_u32(countV2,countV2);
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outIndex = countV2[0];
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/* if (blockSize - 1U) is not multiple of 4 */
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blkCnt = (blockSize - 4 ) % 4U;
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while (blkCnt > 0U)
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{
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/* Initialize maxVal to the next consecutive values one by one */
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maxVal1 = *pSrc++;
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/* compare for the maximum value */
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if (out < maxVal1)
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{
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/* Update the maximum value and it's index */
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out = maxVal1;
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outIndex = blockSize - blkCnt ;
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}
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/* Decrement the loop counter */
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blkCnt--;
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}
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}
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/* Store the maximum value and it's index into destination pointers */
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*pResult = out;
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*pIndex = outIndex;
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}
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#else
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void arm_max_f32(
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const float32_t * pSrc,
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uint32_t blockSize,
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float32_t * pResult,
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uint32_t * pIndex)
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{
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float32_t maxVal, out; /* Temporary variables to store the output value. */
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uint32_t blkCnt, outIndex; /* Loop counter */
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#if defined (ARM_MATH_LOOPUNROLL)
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uint32_t index; /* index of maximum value */
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#endif
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/* Initialise index value to zero. */
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outIndex = 0U;
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/* Load first input value that act as reference value for comparision */
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out = *pSrc++;
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#if defined (ARM_MATH_LOOPUNROLL)
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/* Initialise index of maximum value. */
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index = 0U;
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/* Loop unrolling: Compute 4 outputs at a time */
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blkCnt = (blockSize - 1U) >> 2U;
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while (blkCnt > 0U)
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{
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/* Initialize maxVal to next consecutive values one by one */
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maxVal = *pSrc++;
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/* compare for the maximum value */
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if (out < maxVal)
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{
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/* Update the maximum value and it's index */
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out = maxVal;
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outIndex = index + 1U;
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}
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maxVal = *pSrc++;
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if (out < maxVal)
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{
|
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out = maxVal;
|
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outIndex = index + 2U;
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}
|
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maxVal = *pSrc++;
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if (out < maxVal)
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{
|
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out = maxVal;
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outIndex = index + 3U;
|
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}
|
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|
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maxVal = *pSrc++;
|
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if (out < maxVal)
|
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{
|
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out = maxVal;
|
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outIndex = index + 4U;
|
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}
|
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|
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index += 4U;
|
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|
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/* Decrement loop counter */
|
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blkCnt--;
|
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}
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|
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/* Loop unrolling: Compute remaining outputs */
|
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blkCnt = (blockSize - 1U) % 4U;
|
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|
||||
#else
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|
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/* Initialize blkCnt with number of samples */
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blkCnt = (blockSize - 1U);
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|
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#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
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|
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while (blkCnt > 0U)
|
||||
{
|
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/* Initialize maxVal to the next consecutive values one by one */
|
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maxVal = *pSrc++;
|
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|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
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out = maxVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the maximum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
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#endif /* #if defined(ARM_MATH_NEON) */
|
||||
/**
|
||||
@} end of Max group
|
||||
*/
|
||||
@ -0,0 +1,148 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_max_q15.c
|
||||
* Description: Maximum value of a Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup Max
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Maximum value of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult maximum value returned here
|
||||
@param[out] pIndex index of maximum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_max_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q15_t maxVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to the next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the maximum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Max group
|
||||
*/
|
||||
@ -0,0 +1,148 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_max_q31.c
|
||||
* Description: Maximum value of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup Max
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Maximum value of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult maximum value returned here
|
||||
@param[out] pIndex index of maximum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_max_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q31_t maxVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to the next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the maximum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Max group
|
||||
*/
|
||||
@ -0,0 +1,148 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_max_q7.c
|
||||
* Description: Maximum value of a Q7 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup Max
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Maximum value of a Q7 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult maximum value returned here
|
||||
@param[out] pIndex index of maximum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_max_q7(
|
||||
const q7_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q7_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q7_t maxVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
maxVal = *pSrc++;
|
||||
if (out < maxVal)
|
||||
{
|
||||
out = maxVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to the next consecutive values one by one */
|
||||
maxVal = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out < maxVal)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the maximum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Max group
|
||||
*/
|
||||
@ -0,0 +1,166 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_mean_f32.c
|
||||
* Description: Mean value of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup mean Mean
|
||||
|
||||
Calculates the mean of the input vector. Mean is defined as the average of the elements in the vector.
|
||||
The underlying algorithm is used:
|
||||
|
||||
<pre>
|
||||
Result = (pSrc[0] + pSrc[1] + pSrc[2] + ... + pSrc[blockSize-1]) / blockSize;
|
||||
</pre>
|
||||
|
||||
There are separate functions for floating-point, Q31, Q15, and Q7 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup mean
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Mean value 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 mean value returned here.
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON_EXPERIMENTAL)
|
||||
void arm_mean_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
float32x4_t sumV = vdupq_n_f32(0.0f); /* Temporary result storage */
|
||||
float32x2_t sumV2;
|
||||
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
|
||||
float32_t in1, in2, in3, in4;
|
||||
float32x4_t inV;
|
||||
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
/* Compute 4 outputs at a time.
|
||||
** a second loop below computes the remaining 1 to 3 samples. */
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
inV = vld1q_f32(pSrc);
|
||||
sumV = vaddq_f32(sumV, inV);
|
||||
|
||||
pSrc += 4;
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
sumV2 = vpadd_f32(vget_low_f32(sumV),vget_high_f32(sumV));
|
||||
sum = sumV2[0] + sumV2[1];
|
||||
|
||||
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
|
||||
** No loop unrolling is used. */
|
||||
blkCnt = blockSize & 3;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
/* Store the result to the destination */
|
||||
*pResult = sum / (float32_t) blockSize;
|
||||
}
|
||||
#else
|
||||
void arm_mean_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
/* Store result to destination */
|
||||
*pResult = (sum / blockSize);
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of mean group
|
||||
*/
|
||||
@ -0,0 +1,114 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_mean_q15.c
|
||||
* Description: Mean value of a Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup mean
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Mean value of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult mean value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 32-bit internal accumulator.
|
||||
The input is represented in 1.15 format and is accumulated in a 32-bit
|
||||
accumulator in 17.15 format.
|
||||
There is no risk of internal overflow with this approach, and the
|
||||
full precision of intermediate result is preserved.
|
||||
Finally, the accumulator is truncated to yield a result of 1.15 format.
|
||||
*/
|
||||
|
||||
void arm_mean_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q31_t sum = 0; /* Temporary result storage */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
q31_t in;
|
||||
#endif
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
in = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum += ((in << 16U) >> 16U);
|
||||
sum += (in >> 16U);
|
||||
|
||||
in = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum += ((in << 16U) >> 16U);
|
||||
sum += (in >> 16U);
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
/* Store result to destination */
|
||||
*pResult = (q15_t) (sum / (int32_t) blockSize);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of mean group
|
||||
*/
|
||||
@ -0,0 +1,110 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_mean_q31.c
|
||||
* Description: Mean value of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup mean
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Mean value of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult mean value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.31 format and is accumulated in a 64-bit
|
||||
accumulator in 33.31 format.
|
||||
There is no risk of internal overflow with this approach, and the
|
||||
full precision of intermediate result is preserved.
|
||||
Finally, the accumulator is truncated to yield a result of 1.31 format.
|
||||
*/
|
||||
|
||||
void arm_mean_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Temporary result storage */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
/* Store result to destination */
|
||||
*pResult = (q31_t) (sum / blockSize);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of mean group
|
||||
*/
|
||||
@ -0,0 +1,112 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_mean_q7.c
|
||||
* Description: Mean value of a Q7 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup mean
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Mean value of a Q7 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult mean value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 32-bit internal accumulator.
|
||||
The input is represented in 1.7 format and is accumulated in a 32-bit
|
||||
accumulator in 25.7 format.
|
||||
There is no risk of internal overflow with this approach, and the
|
||||
full precision of intermediate result is preserved.
|
||||
Finally, the accumulator is truncated to yield a result of 1.7 format.
|
||||
*/
|
||||
|
||||
void arm_mean_q7(
|
||||
const q7_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q7_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q31_t sum = 0; /* Temporary result storage */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
q31_t in;
|
||||
#endif
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
in = read_q7x4_ia ((q7_t **) &pSrc);
|
||||
sum += ((in << 24U) >> 24U);
|
||||
sum += ((in << 16U) >> 24U);
|
||||
sum += ((in << 8U) >> 24U);
|
||||
sum += (in >> 24U);
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
sum += *pSrc++;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
/* Store result to destination */
|
||||
*pResult = (q7_t) (sum / (int32_t) blockSize);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of mean group
|
||||
*/
|
||||
@ -0,0 +1,268 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_min_f32.c
|
||||
* Description: Minimum value of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
#include <limits.h>
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup Min Minimum
|
||||
|
||||
Computes the minimum value of an array of data.
|
||||
The function returns both the minimum value and its position within the array.
|
||||
There are separate functions for floating-point, Q31, Q15, and Q7 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup Min
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Minimum value 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
|
||||
@param[out] pIndex index of minimum value returned here
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON)
|
||||
void arm_min_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
float32_t maxVal1, maxVal2, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex, count; /* loop counter */
|
||||
|
||||
float32x4_t outV, srcV;
|
||||
float32x2_t outV2;
|
||||
|
||||
uint32x4_t idxV;
|
||||
uint32x4_t maxIdx={ULONG_MAX,ULONG_MAX,ULONG_MAX,ULONG_MAX};
|
||||
uint32x4_t index={4,5,6,7};
|
||||
uint32x4_t delta={4,4,4,4};
|
||||
uint32x4_t countV={0,1,2,3};
|
||||
uint32x2_t countV2;
|
||||
|
||||
/* Initialise the count value. */
|
||||
count = 0U;
|
||||
|
||||
/* Initialise the index value to zero. */
|
||||
outIndex = 0U;
|
||||
|
||||
/* Load first input value that act as reference value for comparison */
|
||||
if (blockSize <= 3)
|
||||
{
|
||||
out = *pSrc++;
|
||||
|
||||
blkCnt = blockSize - 1;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to the next consecutive values one by one */
|
||||
maxVal1 = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out > maxVal1)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal1;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
outV = vld1q_f32(pSrc);
|
||||
pSrc += 4;
|
||||
|
||||
/* Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 4 ) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
srcV = vld1q_f32(pSrc);
|
||||
pSrc += 4;
|
||||
|
||||
idxV = vcltq_f32(srcV, outV);
|
||||
outV = vbslq_f32(idxV, srcV, outV );
|
||||
countV = vbslq_u32(idxV, index,countV );
|
||||
|
||||
index = vaddq_u32(index,delta);
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
outV2 = vpmin_f32(vget_low_f32(outV),vget_high_f32(outV));
|
||||
outV2 = vpmin_f32(outV2,outV2);
|
||||
out = outV2[0];
|
||||
|
||||
idxV = vceqq_f32(outV, vdupq_n_f32(out));
|
||||
countV = vbslq_u32(idxV, countV,maxIdx);
|
||||
|
||||
countV2 = vpmin_u32(vget_low_u32(countV),vget_high_u32(countV));
|
||||
countV2 = vpmin_u32(countV2,countV2);
|
||||
outIndex = countV2[0];
|
||||
|
||||
/* if (blockSize - 1U) is not multiple of 4 */
|
||||
blkCnt = (blockSize - 4 ) % 4U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize maxVal to the next consecutive values one by one */
|
||||
maxVal1 = *pSrc++;
|
||||
|
||||
/* compare for the maximum value */
|
||||
if (out > maxVal1)
|
||||
{
|
||||
/* Update the maximum value and it's index */
|
||||
out = maxVal1;
|
||||
outIndex = blockSize - blkCnt ;
|
||||
}
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
}
|
||||
|
||||
/* Store the maximum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
#else
|
||||
void arm_min_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
float32_t minVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to the next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the minimum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of Min group
|
||||
*/
|
||||
@ -0,0 +1,149 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_min_q15.c
|
||||
* Description: Minimum value of a Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
|
||||
/**
|
||||
@addtogroup Min
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Minimum value of a Q15 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
|
||||
@param[out] pIndex index of minimum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_min_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q15_t minVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to the next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the minimum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Min group
|
||||
*/
|
||||
@ -0,0 +1,149 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_min_q31.c
|
||||
* Description: Minimum value of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
|
||||
/**
|
||||
@addtogroup Min
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Minimum value of a Q31 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
|
||||
@param[out] pIndex index of minimum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_min_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q31_t minVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to the next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the minimum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Min group
|
||||
*/
|
||||
@ -0,0 +1,149 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_min_q7.c
|
||||
* Description: Minimum value of a Q7 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
|
||||
/**
|
||||
@addtogroup Min
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Minimum value of a Q7 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
|
||||
@param[out] pIndex index of minimum value returned here
|
||||
@return none
|
||||
*/
|
||||
|
||||
void arm_min_q7(
|
||||
const q7_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q7_t * pResult,
|
||||
uint32_t * pIndex)
|
||||
{
|
||||
q7_t minVal, out; /* Temporary variables to store the output value. */
|
||||
uint32_t blkCnt, outIndex; /* Loop counter */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
uint32_t index; /* index of maximum value */
|
||||
#endif
|
||||
|
||||
/* Initialise index value to zero. */
|
||||
outIndex = 0U;
|
||||
/* Load first input value that act as reference value for comparision */
|
||||
out = *pSrc++;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
/* Initialise index of maximum value. */
|
||||
index = 0U;
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = (blockSize - 1U) >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = index + 1U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 2U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 3U;
|
||||
}
|
||||
|
||||
minVal = *pSrc++;
|
||||
if (out > minVal)
|
||||
{
|
||||
out = minVal;
|
||||
outIndex = index + 4U;
|
||||
}
|
||||
|
||||
index += 4U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = (blockSize - 1U) % 4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = (blockSize - 1U);
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* Initialize minVal to the next consecutive values one by one */
|
||||
minVal = *pSrc++;
|
||||
|
||||
/* compare for the minimum value */
|
||||
if (out > minVal)
|
||||
{
|
||||
/* Update the minimum value and it's index */
|
||||
out = minVal;
|
||||
outIndex = blockSize - blkCnt;
|
||||
}
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the minimum value and it's index into destination pointers */
|
||||
*pResult = out;
|
||||
*pIndex = outIndex;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of Min group
|
||||
*/
|
||||
@ -0,0 +1,175 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_power_f32.c
|
||||
* Description: Sum of the squares of the elements of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup power Power
|
||||
|
||||
Calculates the sum of the squares of the elements in the input vector.
|
||||
The underlying algorithm is used:
|
||||
|
||||
<pre>
|
||||
Result = pSrc[0] * pSrc[0] + pSrc[1] * pSrc[1] + pSrc[2] * pSrc[2] + ... + pSrc[blockSize-1] * pSrc[blockSize-1];
|
||||
</pre>
|
||||
|
||||
There are separate functions for floating point, Q31, Q15, and Q7 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup power
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Sum of the squares of the elements 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 sum of the squares value returned here
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON)
|
||||
void arm_power_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
float32_t sum = 0.0f; /* accumulator */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
uint32_t blkCnt; /* loop counter */
|
||||
|
||||
float32x4_t sumV = vdupq_n_f32(0.0f); /* Temporary result storage */
|
||||
float32x2_t sumV2;
|
||||
float32x4_t inV;
|
||||
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
/* Compute 4 outputs at a time.
|
||||
** a second loop below computes the remaining 1 to 3 samples. */
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* Compute Power and then store the result in a temporary variable, sum. */
|
||||
inV = vld1q_f32(pSrc);
|
||||
sumV = vmlaq_f32(sumV, inV, inV);
|
||||
pSrc += 4;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
sumV2 = vpadd_f32(vget_low_f32(sumV),vget_high_f32(sumV));
|
||||
sum = sumV2[0] + sumV2[1];
|
||||
|
||||
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
|
||||
** No loop unrolling is used. */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* compute power and then store the result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store the result to the destination */
|
||||
*pResult = sum;
|
||||
}
|
||||
#else
|
||||
void arm_power_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store result to destination */
|
||||
*pResult = sum;
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of power group
|
||||
*/
|
||||
@ -0,0 +1,132 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_power_q15.c
|
||||
* Description: Sum of the squares of the elements of a Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup power
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Sum of the squares of the elements of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult sum of the squares value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.15 format.
|
||||
Intermediate multiplication yields a 2.30 format, and this
|
||||
result is added without saturation to a 64-bit accumulator in 34.30 format.
|
||||
With 33 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the return result is in 34.30 format.
|
||||
*/
|
||||
|
||||
void arm_power_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q63_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Temporary result storage */
|
||||
q15_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
|
||||
q31_t in32; /* Temporary variable to store packed input value */
|
||||
#endif
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum = __SMLALD(in32, in32, sum);
|
||||
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum = __SMLALD(in32, in32, sum);
|
||||
#else
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store result in 34.30 format */
|
||||
*pResult = sum;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of power group
|
||||
*/
|
||||
@ -0,0 +1,121 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_power_q31.c
|
||||
* Description: Sum of the squares of the elements of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup power
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Sum of the squares of the elements of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult sum of the squares value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.31 format.
|
||||
Intermediate multiplication yields a 2.62 format, and this
|
||||
result is truncated to 2.48 format by discarding the lower 14 bits.
|
||||
The 2.48 result is then added without saturation to a 64-bit accumulator in 16.48 format.
|
||||
With 15 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the return result is in 16.48 format.
|
||||
*/
|
||||
|
||||
void arm_power_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q63_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Temporary result storage */
|
||||
q31_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power then shift intermediate results by 14 bits to maintain 16.48 format and store result in a temporary variable sum, providing 15 guard bits. */
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in) >> 14U;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in) >> 14U;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in) >> 14U;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in) >> 14U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in) >> 14U;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store results in 16.48 format */
|
||||
*pResult = sum;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of power group
|
||||
*/
|
||||
@ -0,0 +1,136 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_power_q7.c
|
||||
* Description: Sum of the squares of the elements of a Q7 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup power
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Sum of the squares of the elements of a Q7 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult sum of the squares value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 32-bit internal accumulator.
|
||||
The input is represented in 1.7 format.
|
||||
Intermediate multiplication yields a 2.14 format, and this
|
||||
result is added without saturation to an accumulator in 18.14 format.
|
||||
With 17 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the return result is in 18.14 format.
|
||||
*/
|
||||
|
||||
void arm_power_q7(
|
||||
const q7_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q31_t sum = 0; /* Temporary result storage */
|
||||
q7_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
|
||||
q31_t in32; /* Temporary variable to store packed input value */
|
||||
q31_t in1, in2; /* Temporary variables to store input value */
|
||||
#endif
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
in32 = read_q7x4_ia ((q7_t **) &pSrc);
|
||||
|
||||
in1 = __SXTB16(__ROR(in32, 8));
|
||||
in2 = __SXTB16(in32);
|
||||
|
||||
/* calculate power and accumulate to accumulator */
|
||||
sum = __SMLAD(in1, in1, sum);
|
||||
sum = __SMLAD(in2, in2, sum);
|
||||
#else
|
||||
in = *pSrc++;
|
||||
sum += ((q15_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q15_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q15_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q15_t) in * in);
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute Power and store result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += ((q15_t) in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Store result in 18.14 format */
|
||||
*pResult = sum;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of power group
|
||||
*/
|
||||
@ -0,0 +1,176 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_rms_f32.c
|
||||
* Description: Root mean square value of the elements of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup RMS Root mean square (RMS)
|
||||
|
||||
Calculates the Root Mean Square of the elements in the input vector.
|
||||
The underlying algorithm is used:
|
||||
|
||||
<pre>
|
||||
Result = sqrt(((pSrc[0] * pSrc[0] + pSrc[1] * pSrc[1] + ... + pSrc[blockSize-1] * pSrc[blockSize-1]) / blockSize));
|
||||
</pre>
|
||||
|
||||
There are separate functions for floating point, Q31, and Q15 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup RMS
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Root Mean Square of the elements 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 root mean square value returned here
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON)
|
||||
void arm_rms_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
float32_t sum = 0.0f; /* accumulator */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
uint32_t blkCnt; /* loop counter */
|
||||
|
||||
float32x4_t sumV = vdupq_n_f32(0.0f); /* Temporary result storage */
|
||||
float32x2_t sumV2;
|
||||
float32x4_t inV;
|
||||
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
/* Compute 4 outputs at a time.
|
||||
** a second loop below computes the remaining 1 to 3 samples. */
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* Compute Power and then store the result in a temporary variable, sum. */
|
||||
inV = vld1q_f32(pSrc);
|
||||
sumV = vmlaq_f32(sumV, inV, inV);
|
||||
pSrc += 4;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
sumV2 = vpadd_f32(vget_low_f32(sumV),vget_high_f32(sumV));
|
||||
sum = sumV2[0] + sumV2[1];
|
||||
|
||||
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
|
||||
** No loop unrolling is used. */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* compute power and then store the result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Rms and store the result in the destination */
|
||||
arm_sqrt_f32(sum / (float32_t) blockSize, pResult);
|
||||
}
|
||||
#else
|
||||
void arm_rms_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sum. */
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
in = *pSrc++;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable. */
|
||||
sum += ( in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Rms and store result in destination */
|
||||
arm_sqrt_f32(sum / (float32_t) blockSize, pResult);
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of RMS group
|
||||
*/
|
||||
@ -0,0 +1,134 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_rms_q15.c
|
||||
* Description: Root Mean Square of the elements of a Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup RMS
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Root Mean Square of the elements of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult root mean square value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.15 format.
|
||||
Intermediate multiplication yields a 2.30 format, and this
|
||||
result is added without saturation to a 64-bit accumulator in 34.30 format.
|
||||
With 33 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the 34.30 result is truncated to 34.15 format by discarding the lower
|
||||
15 bits, and then saturated to yield a result in 1.15 format.
|
||||
*/
|
||||
|
||||
void arm_rms_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Temporary result storage */
|
||||
q15_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
|
||||
q31_t in32; /* Temporary variable to store input value */
|
||||
#endif
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
/* Compute sum of squares and store result in a temporary variable. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum = __SMLALD(in32, in32, sum);
|
||||
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sum = __SMLALD(in32, in32, sum);
|
||||
#else
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q31_t) in * in);
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable. */
|
||||
sum += ((q31_t) in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Truncating and saturating the accumulator to 1.15 format */
|
||||
/* Store result in destination */
|
||||
arm_sqrt_q15(__SSAT((sum / (q63_t)blockSize) >> 15, 16), pResult);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of RMS group
|
||||
*/
|
||||
@ -0,0 +1,124 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_rms_q31.c
|
||||
* Description: Root Mean Square of the elements of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup RMS
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Root Mean Square of the elements of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult root mean square value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using an internal 64-bit accumulator.
|
||||
The input is represented in 1.31 format, and intermediate multiplication
|
||||
yields a 2.62 format.
|
||||
The accumulator maintains full precision of the intermediate multiplication results,
|
||||
but provides only a single guard bit.
|
||||
There is no saturation on intermediate additions.
|
||||
If the accumulator overflows, it wraps around and distorts the result.
|
||||
In order to avoid overflows completely, the input signal must be scaled down by
|
||||
log2(blockSize) bits, as a total of blockSize additions are performed internally.
|
||||
Finally, the 2.62 accumulator is right shifted by 31 bits to yield a 1.31 format value.
|
||||
*/
|
||||
|
||||
void arm_rms_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
uint64_t sum = 0; /* Temporary result storage (can get never negative. changed type from q63 to uint64 */
|
||||
q31_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sum. */
|
||||
sum += ((q63_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in);
|
||||
|
||||
in = *pSrc++;
|
||||
sum += ((q63_t) in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable. */
|
||||
sum += ((q63_t) in * in);
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Convert data in 2.62 to 1.31 by 31 right shifts and saturate */
|
||||
/* Compute Rms and store result in destination vector */
|
||||
arm_sqrt_q31(clip_q63_to_q31((sum / (q63_t) blockSize) >> 31), pResult);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of RMS group
|
||||
*/
|
||||
@ -0,0 +1,188 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_std_f32.c
|
||||
* Description: Standard deviation of the elements of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup STD Standard deviation
|
||||
|
||||
Calculates the standard deviation of the elements in the input vector.
|
||||
The underlying algorithm is used:
|
||||
|
||||
<pre>
|
||||
Result = sqrt((sumOfSquares - sum<sup>2</sup> / blockSize) / (blockSize - 1))
|
||||
|
||||
sumOfSquares = pSrc[0] * pSrc[0] + pSrc[1] * pSrc[1] + ... + pSrc[blockSize-1] * pSrc[blockSize-1]
|
||||
sum = pSrc[0] + pSrc[1] + pSrc[2] + ... + pSrc[blockSize-1]
|
||||
</pre>
|
||||
|
||||
There are separate functions for floating point, Q31, and Q15 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup STD
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Standard deviation of the elements 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 standard deviation value returned here
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON_EXPERIMENTAL)
|
||||
void arm_std_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
float32_t var;
|
||||
arm_var_f32(pSrc,blockSize,&var);
|
||||
arm_sqrt_f32(var, pResult);
|
||||
}
|
||||
#else
|
||||
void arm_std_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
float32_t sumOfSquares = 0.0f; /* Sum of squares */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
|
||||
#ifndef ARM_MATH_CM0_FAMILY
|
||||
float32_t meanOfSquares, mean, squareOfMean; /* Temporary variables */
|
||||
#else
|
||||
float32_t squareOfSum; /* Square of Sum */
|
||||
float32_t var; /* Temporary varaince storage */
|
||||
#endif
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += in * in;
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += in * in;
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += in * in;
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += in * in;
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += ( in * in);
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
#ifndef ARM_MATH_CM0_FAMILY
|
||||
|
||||
/* Compute Mean of squares and store result in a temporary variable, meanOfSquares. */
|
||||
meanOfSquares = sumOfSquares / ((float32_t) blockSize - 1.0f);
|
||||
|
||||
/* Compute mean of all input values */
|
||||
mean = sum / (float32_t) blockSize;
|
||||
|
||||
/* Compute square of mean */
|
||||
squareOfMean = (mean * mean) * (((float32_t) blockSize) /
|
||||
((float32_t) blockSize - 1.0f));
|
||||
|
||||
/* Compute standard deviation and store result to destination */
|
||||
arm_sqrt_f32((meanOfSquares - squareOfMean), pResult);
|
||||
|
||||
#else
|
||||
/* Run the below code for Cortex-M0 */
|
||||
|
||||
/* Compute square of sum */
|
||||
squareOfSum = ((sum * sum) / (float32_t) blockSize);
|
||||
|
||||
/* Compute variance */
|
||||
var = ((sumOfSquares - squareOfSum) / (float32_t) (blockSize - 1.0f));
|
||||
|
||||
/* Compute standard deviation and store result in destination */
|
||||
arm_sqrt_f32(var, pResult);
|
||||
|
||||
#endif /* #ifndef ARM_MATH_CM0_FAMILY */
|
||||
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of STD group
|
||||
*/
|
||||
@ -0,0 +1,161 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_std_q15.c
|
||||
* Description: Standard deviation of an array of Q15 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup STD
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Standard deviation of the elements of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult standard deviation value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.15 format.
|
||||
Intermediate multiplication yields a 2.30 format, and this
|
||||
result is added without saturation to a 64-bit accumulator in 34.30 format.
|
||||
With 33 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the 34.30 result is truncated to 34.15 format by discarding the lower
|
||||
15 bits, and then saturated to yield a result in 1.15 format.
|
||||
*/
|
||||
|
||||
void arm_std_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q31_t sum = 0; /* Accumulator */
|
||||
q31_t meanOfSquares, squareOfMean; /* Square of mean and mean of square */
|
||||
q63_t sumOfSquares = 0; /* Sum of squares */
|
||||
q15_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
|
||||
q31_t in32; /* Temporary variable to store input value */
|
||||
#endif
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sumOfSquares = __SMLALD(in32, in32, sumOfSquares);
|
||||
sum += ((in32 << 16U) >> 16U);
|
||||
sum += (in32 >> 16U);
|
||||
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sumOfSquares = __SMLALD(in32, in32, sumOfSquares);
|
||||
sum += ((in32 << 16U) >> 16U);
|
||||
sum += (in32 >> 16U);
|
||||
#else
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += (in * in);
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Mean of squares and store result in a temporary variable, meanOfSquares. */
|
||||
meanOfSquares = (q31_t) (sumOfSquares / (q63_t)(blockSize - 1U));
|
||||
|
||||
/* Compute square of mean */
|
||||
squareOfMean = (q31_t) ((q63_t) sum * sum / (q63_t)(blockSize * (blockSize - 1U)));
|
||||
|
||||
/* mean of squares minus the square of mean. */
|
||||
/* Compute standard deviation and store result in destination */
|
||||
arm_sqrt_q15(__SSAT((meanOfSquares - squareOfMean) >> 15U, 16U), pResult);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of STD group
|
||||
*/
|
||||
@ -0,0 +1,147 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_std_q31.c
|
||||
* Description: Standard deviation of the elements of a Q31 vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup STD
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Standard deviation of the elements of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector.
|
||||
@param[in] blockSize number of samples in input vector.
|
||||
@param[out] pResult standard deviation value returned here.
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using an internal 64-bit accumulator.
|
||||
The input is represented in 1.31 format, which is then downshifted by 8 bits
|
||||
which yields 1.23, and intermediate multiplication yields a 2.46 format.
|
||||
The accumulator maintains full precision of the intermediate multiplication results,
|
||||
but provides only a 16 guard bits.
|
||||
There is no saturation on intermediate additions.
|
||||
If the accumulator overflows it wraps around and distorts the result.
|
||||
In order to avoid overflows completely the input signal must be scaled down by
|
||||
log2(blockSize)-8 bits, as a total of blockSize additions are performed internally.
|
||||
After division, internal variables should be Q18.46
|
||||
Finally, the 18.46 accumulator is right shifted by 15 bits to yield a 1.31 format value.
|
||||
*/
|
||||
|
||||
void arm_std_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Accumulator */
|
||||
q63_t meanOfSquares, squareOfMean; /* Square of mean and mean of square */
|
||||
q63_t sumOfSquares = 0; /* Sum of squares */
|
||||
q31_t in; /* Temporary variable to store input value */
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Mean of squares and store result in a temporary variable, meanOfSquares. */
|
||||
meanOfSquares = (sumOfSquares / (q63_t)(blockSize - 1U));
|
||||
|
||||
/* Compute square of mean */
|
||||
squareOfMean = ( sum * sum / (q63_t)(blockSize * (blockSize - 1U)));
|
||||
|
||||
/* Compute standard deviation and store result in destination */
|
||||
arm_sqrt_q31((meanOfSquares - squareOfMean) >> 15U, pResult);
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of STD group
|
||||
*/
|
||||
@ -0,0 +1,234 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_var_f32.c
|
||||
* Description: Variance of the elements of a floating-point vector
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@defgroup variance Variance
|
||||
|
||||
Calculates the variance of the elements in the input vector.
|
||||
The underlying algorithm used is the direct method sometimes referred to as the two-pass method:
|
||||
|
||||
<pre>
|
||||
Result = sum(element - meanOfElements)^2) / numElement - 1
|
||||
|
||||
meanOfElements = ( pSrc[0] * pSrc[0] + pSrc[1] * pSrc[1] + ... + pSrc[blockSize-1] ) / blockSize
|
||||
</pre>
|
||||
|
||||
There are separate functions for floating point, Q31, and Q15 data types.
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup variance
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Variance of the elements 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 variance value returned here
|
||||
@return none
|
||||
*/
|
||||
#if defined(ARM_MATH_NEON_EXPERIMENTAL)
|
||||
void arm_var_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
float32_t mean;
|
||||
|
||||
float32_t sum = 0.0f; /* accumulator */
|
||||
float32_t in; /* Temporary variable to store input value */
|
||||
uint32_t blkCnt; /* loop counter */
|
||||
|
||||
float32x4_t sumV = vdupq_n_f32(0.0f); /* Temporary result storage */
|
||||
float32x2_t sumV2;
|
||||
float32x4_t inV;
|
||||
float32x4_t avg;
|
||||
|
||||
arm_mean_f32(pSrc,blockSize,&mean);
|
||||
avg = vdupq_n_f32(mean);
|
||||
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
/* Compute 4 outputs at a time.
|
||||
** a second loop below computes the remaining 1 to 3 samples. */
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* Compute Power and then store the result in a temporary variable, sum. */
|
||||
inV = vld1q_f32(pSrc);
|
||||
inV = vsubq_f32(inV, avg);
|
||||
sumV = vmlaq_f32(sumV, inV, inV);
|
||||
pSrc += 4;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
sumV2 = vpadd_f32(vget_low_f32(sumV),vget_high_f32(sumV));
|
||||
sum = sumV2[0] + sumV2[1];
|
||||
|
||||
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
|
||||
** No loop unrolling is used. */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* compute power and then store the result in a temporary variable, sum. */
|
||||
in = *pSrc++;
|
||||
in = in - mean;
|
||||
sum += in * in;
|
||||
|
||||
/* Decrement the loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Variance */
|
||||
*pResult = sum / (float32_t)(blockSize - 1.0f);
|
||||
|
||||
}
|
||||
|
||||
#else
|
||||
void arm_var_f32(
|
||||
const float32_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
float32_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
float32_t sum = 0.0f; /* Temporary result storage */
|
||||
float32_t fSum = 0.0f;
|
||||
float32_t fMean, fValue;
|
||||
const float32_t * pInput = pSrc;
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
|
||||
sum += *pInput++;
|
||||
sum += *pInput++;
|
||||
sum += *pInput++;
|
||||
sum += *pInput++;
|
||||
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */
|
||||
|
||||
sum += *pInput++;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize */
|
||||
fMean = sum / (float32_t) blockSize;
|
||||
|
||||
pInput = pSrc;
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
fValue = *pInput++ - fMean;
|
||||
fSum += fValue * fValue;
|
||||
|
||||
fValue = *pInput++ - fMean;
|
||||
fSum += fValue * fValue;
|
||||
|
||||
fValue = *pInput++ - fMean;
|
||||
fSum += fValue * fValue;
|
||||
|
||||
fValue = *pInput++ - fMean;
|
||||
fSum += fValue * fValue;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
fValue = *pInput++ - fMean;
|
||||
fSum += fValue * fValue;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Variance */
|
||||
*pResult = fSum / (float32_t)(blockSize - 1.0f);
|
||||
}
|
||||
#endif /* #if defined(ARM_MATH_NEON) */
|
||||
|
||||
/**
|
||||
@} end of variance group
|
||||
*/
|
||||
@ -0,0 +1,164 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_var_q15.c
|
||||
* Description: Variance of an array of Q15 type
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup variance
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Variance of the elements of a Q15 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult variance value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using a 64-bit internal accumulator.
|
||||
The input is represented in 1.15 format.
|
||||
Intermediate multiplication yields a 2.30 format, and this
|
||||
result is added without saturation to a 64-bit accumulator in 34.30 format.
|
||||
With 33 guard bits in the accumulator, there is no risk of overflow, and the
|
||||
full precision of the intermediate multiplication is preserved.
|
||||
Finally, the 34.30 result is truncated to 34.15 format by discarding the lower
|
||||
15 bits, and then saturated to yield a result in 1.15 format.
|
||||
*/
|
||||
|
||||
void arm_var_q15(
|
||||
const q15_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q15_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q31_t sum = 0; /* Accumulator */
|
||||
q31_t meanOfSquares, squareOfMean; /* Square of mean and mean of square */
|
||||
q63_t sumOfSquares = 0; /* Sum of squares */
|
||||
q15_t in; /* Temporary variable to store input value */
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
|
||||
q31_t in32; /* Temporary variable to store input value */
|
||||
#endif
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sumOfSquares = __SMLALD(in32, in32, sumOfSquares);
|
||||
sum += ((in32 << 16U) >> 16U);
|
||||
sum += (in32 >> 16U);
|
||||
|
||||
in32 = read_q15x2_ia ((q15_t **) &pSrc);
|
||||
sumOfSquares = __SMLALD(in32, in32, sumOfSquares);
|
||||
sum += ((in32 << 16U) >> 16U);
|
||||
sum += (in32 >> 16U);
|
||||
#else
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++;
|
||||
sumOfSquares += (in * in);
|
||||
sum += in;
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
#if defined (ARM_MATH_DSP)
|
||||
sumOfSquares = __SMLALD(in, in, sumOfSquares);
|
||||
#else
|
||||
sumOfSquares += (in * in);
|
||||
#endif /* #if defined (ARM_MATH_DSP) */
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Mean of squares and store result in a temporary variable, meanOfSquares. */
|
||||
meanOfSquares = (q31_t) (sumOfSquares / (q63_t)(blockSize - 1U));
|
||||
|
||||
/* Compute square of mean */
|
||||
squareOfMean = (q31_t) ((q63_t) sum * sum / (q63_t)(blockSize * (blockSize - 1U)));
|
||||
|
||||
/* mean of squares minus the square of mean. */
|
||||
*pResult = (meanOfSquares - squareOfMean) >> 15U;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of variance group
|
||||
*/
|
||||
@ -0,0 +1,147 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_var_q31.c
|
||||
* Description: Variance of an array of Q31 type
|
||||
*
|
||||
* $Date: 18. March 2019
|
||||
* $Revision: V1.6.0
|
||||
*
|
||||
* Target Processor: Cortex-M cores
|
||||
* -------------------------------------------------------------------- */
|
||||
/*
|
||||
* Copyright (C) 2010-2019 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 "arm_math.h"
|
||||
|
||||
/**
|
||||
@ingroup groupStats
|
||||
*/
|
||||
|
||||
/**
|
||||
@addtogroup variance
|
||||
@{
|
||||
*/
|
||||
|
||||
/**
|
||||
@brief Variance of the elements of a Q31 vector.
|
||||
@param[in] pSrc points to the input vector
|
||||
@param[in] blockSize number of samples in input vector
|
||||
@param[out] pResult variance value returned here
|
||||
@return none
|
||||
|
||||
@par Scaling and Overflow Behavior
|
||||
The function is implemented using an internal 64-bit accumulator.
|
||||
The input is represented in 1.31 format, which is then downshifted by 8 bits
|
||||
which yields 1.23, and intermediate multiplication yields a 2.46 format.
|
||||
The accumulator maintains full precision of the intermediate multiplication results,
|
||||
but provides only a 16 guard bits.
|
||||
There is no saturation on intermediate additions.
|
||||
If the accumulator overflows it wraps around and distorts the result.
|
||||
In order to avoid overflows completely the input signal must be scaled down by
|
||||
log2(blockSize)-8 bits, as a total of blockSize additions are performed internally.
|
||||
After division, internal variables should be Q18.46
|
||||
Finally, the 18.46 accumulator is right shifted by 15 bits to yield a 1.31 format value.
|
||||
*/
|
||||
|
||||
void arm_var_q31(
|
||||
const q31_t * pSrc,
|
||||
uint32_t blockSize,
|
||||
q31_t * pResult)
|
||||
{
|
||||
uint32_t blkCnt; /* Loop counter */
|
||||
q63_t sum = 0; /* Temporary result storage */
|
||||
q63_t meanOfSquares, squareOfMean; /* Square of mean and mean of square */
|
||||
q63_t sumOfSquares = 0; /* Sum of squares */
|
||||
q31_t in; /* Temporary variable to store input value */
|
||||
|
||||
if (blockSize <= 1U)
|
||||
{
|
||||
*pResult = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
#if defined (ARM_MATH_LOOPUNROLL)
|
||||
|
||||
/* Loop unrolling: Compute 4 outputs at a time */
|
||||
blkCnt = blockSize >> 2U;
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Loop unrolling: Compute remaining outputs */
|
||||
blkCnt = blockSize % 0x4U;
|
||||
|
||||
#else
|
||||
|
||||
/* Initialize blkCnt with number of samples */
|
||||
blkCnt = blockSize;
|
||||
|
||||
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
|
||||
|
||||
while (blkCnt > 0U)
|
||||
{
|
||||
/* C = A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1] */
|
||||
/* C = A[0] + A[1] + ... + A[blockSize-1] */
|
||||
|
||||
in = *pSrc++ >> 8U;
|
||||
/* Compute sum of squares and store result in a temporary variable, sumOfSquares. */
|
||||
sumOfSquares += ((q63_t) (in) * (in));
|
||||
/* Compute sum and store result in a temporary variable, sum. */
|
||||
sum += in;
|
||||
|
||||
/* Decrement loop counter */
|
||||
blkCnt--;
|
||||
}
|
||||
|
||||
/* Compute Mean of squares and store result in a temporary variable, meanOfSquares. */
|
||||
meanOfSquares = (sumOfSquares / (q63_t)(blockSize - 1U));
|
||||
|
||||
/* Compute square of mean */
|
||||
squareOfMean = ( sum * sum / (q63_t)(blockSize * (blockSize - 1U)));
|
||||
|
||||
/* Compute variance and store result in destination */
|
||||
*pResult = (meanOfSquares - squareOfMean) >> 15U;
|
||||
}
|
||||
|
||||
/**
|
||||
@} end of variance group
|
||||
*/
|
||||
Reference in New Issue
Block a user