From 2628932a40d769d8d0180ba6fed1e7b9b2718982 Mon Sep 17 00:00:00 2001 From: jaseg Date: Sun, 3 May 2020 19:53:02 +0200 Subject: minkbd: repo restructure --- .../DSP/Source/StatisticsFunctions/arm_rms_q31.c | 137 --------------------- 1 file changed, 137 deletions(-) delete mode 100644 Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_rms_q31.c (limited to 'Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_rms_q31.c') diff --git a/Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_rms_q31.c b/Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_rms_q31.c deleted file mode 100644 index 7cb9149..0000000 --- a/Blink/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_rms_q31.c +++ /dev/null @@ -1,137 +0,0 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_rms_q31.c - * Description: Root Mean Square of the elements of a Q31 vector - * - * $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" - -/** - * @addtogroup RMS - * @{ - */ - - -/** - * @brief Root Mean Square 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 rms 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, 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( - q31_t * pSrc, - uint32_t blockSize, - q31_t * pResult) -{ - q63_t sum = 0; /* accumulator */ - q31_t in; /* Temporary variable to store the input */ - uint32_t blkCnt; /* loop counter */ - -#if defined (ARM_MATH_DSP) - /* Run the below code for Cortex-M4 and Cortex-M3 */ - - q31_t in1, in2, in3, in4; /* Temporary input variables */ - - /*loop Unrolling */ - blkCnt = blockSize >> 2U; - - /* First part of the processing with loop unrolling. Compute 8 outputs at a time. - ** a second loop below computes the remaining 1 to 7 samples. */ - while (blkCnt > 0U) - { - /* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */ - /* Compute sum of the squares and then store the result in a temporary variable, sum */ - /* read two samples from source buffer */ - in1 = pSrc[0]; - in2 = pSrc[1]; - - /* calculate power and accumulate to accumulator */ - sum += (q63_t) in1 *in1; - sum += (q63_t) in2 *in2; - - /* read two samples from source buffer */ - in3 = pSrc[2]; - in4 = pSrc[3]; - - /* calculate power and accumulate to accumulator */ - sum += (q63_t) in3 *in3; - sum += (q63_t) in4 *in4; - - - /* update source buffer to process next samples */ - pSrc += 4U; - - /* Decrement the loop counter */ - blkCnt--; - } - - /* If the blockSize is not a multiple of 8, compute any remaining output samples here. - ** No loop unrolling is used. */ - blkCnt = blockSize % 0x4U; - -#else - /* Run the below code for Cortex-M0 */ - - blkCnt = blockSize; - -#endif /* #if defined (ARM_MATH_DSP) */ - - while (blkCnt > 0U) - { - /* C = A[0] * A[0] + A[1] * A[1] + A[2] * A[2] + ... + A[blockSize-1] * A[blockSize-1] */ - /* Compute sum of the squares and then store the results in a temporary variable, sum */ - in = *pSrc++; - sum += (q63_t) in *in; - - /* Decrement the loop counter */ - blkCnt--; - } - - /* Convert data in 2.62 to 1.31 by 31 right shifts and saturate */ - /* Compute Rms and store the result in the destination vector */ - arm_sqrt_q31(clip_q63_to_q31((sum / (q63_t) blockSize) >> 31), pResult); -} - -/** - * @} end of RMS group - */ -- cgit