From d8b6d18d2fefee381eb6a26334a13e94126b6d8e Mon Sep 17 00:00:00 2001 From: jaseg Date: Mon, 21 Dec 2020 16:22:11 +0100 Subject: Remove obsolete template code from fw --- .../DSP/Source/StatisticsFunctions/arm_var_q31.c | 169 --------------------- 1 file changed, 169 deletions(-) delete mode 100644 fw/hid-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q31.c (limited to 'fw/hid-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q31.c') diff --git a/fw/hid-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q31.c b/fw/hid-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q31.c deleted file mode 100644 index 08e80fe..0000000 --- a/fw/hid-dials/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q31.c +++ /dev/null @@ -1,169 +0,0 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_var_q31.c - * Description: Variance of an array of Q31 type - * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 - * - * Target Processor: Cortex-M cores - * -------------------------------------------------------------------- */ -/* - * Copyright (C) 2010-2017 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 length of the input vector - * @param[out] *pResult variance value returned here - * @return none. - * @details - * Scaling and Overflow Behavior: - * - *\par - * 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( - q31_t * pSrc, - uint32_t blockSize, - q31_t * pResult) -{ - q63_t sum = 0; /* Accumulator */ - q63_t meanOfSquares, squareOfMean; /* square of mean and mean of square */ - q31_t in; /* input value */ - uint32_t blkCnt; /* loop counter */ - q63_t sumOfSquares = 0; /* Accumulator */ - - if (blockSize == 1U) - { - *pResult = 0; - return; - } - -#if defined (ARM_MATH_DSP) - /* Run the below code for Cortex-M4 and Cortex-M3 */ - - /*loop Unrolling */ - blkCnt = blockSize >> 2U; - - /* First part of the processing with loop unrolling. 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[blockSize-1] * A[blockSize-1]) */ - /* Compute Sum of squares of the input samples - * and then store the result in a temporary variable, sum. */ - in = *pSrc++ >> 8U; - sum += in; - sumOfSquares += ((q63_t) (in) * (in)); - in = *pSrc++ >> 8U; - sum += in; - sumOfSquares += ((q63_t) (in) * (in)); - in = *pSrc++ >> 8U; - sum += in; - sumOfSquares += ((q63_t) (in) * (in)); - in = *pSrc++ >> 8U; - sum += in; - sumOfSquares += ((q63_t) (in) * (in)); - - /* Decrement the loop counter */ - blkCnt--; - } - - /* 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[blockSize-1] * A[blockSize-1]) */ - /* Compute Sum of squares of the input samples - * and then store the result in a temporary variable, sum. */ - in = *pSrc++ >> 8U; - sum += in; - sumOfSquares += ((q63_t) (in) * (in)); - - /* Decrement the loop counter */ - blkCnt--; - } - - /* Compute Mean of squares of the input samples - * and then store the result in a temporary variable, meanOfSquares. */ - meanOfSquares = sumOfSquares / (q63_t)(blockSize - 1U); - -#else - /* Run the below code for Cortex-M0 */ - - /* Loop over blockSize number of values */ - blkCnt = blockSize; - - while (blkCnt > 0U) - { - /* C = (A[0] * A[0] + A[1] * A[1] + ... + A[blockSize-1] * A[blockSize-1]) */ - /* Compute Sum of squares of the input samples - * and then store the result in a temporary variable, sumOfSquares. */ - in = *pSrc++ >> 8U; - sumOfSquares += ((q63_t) (in) * (in)); - - /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */ - /* Compute sum of all input values and then store the result in a temporary variable, sum. */ - sum += in; - - /* Decrement the loop counter */ - blkCnt--; - } - - /* Compute Mean of squares of the input samples - * and then store the result in a temporary variable, meanOfSquares. */ - meanOfSquares = sumOfSquares / (q63_t)(blockSize - 1U); - -#endif /* #if defined (ARM_MATH_DSP) */ - - /* Compute square of mean */ - squareOfMean = sum * sum / (q63_t)(blockSize * (blockSize - 1U)); - - /* Compute standard deviation and then store the result to the destination */ - *pResult = (meanOfSquares - squareOfMean) >> 15U; -} - -/** - * @} end of variance group - */ -- cgit