From 9c59a184dba820975e5da6fcd5d248aee87f7e2f Mon Sep 17 00:00:00 2001 From: Clyne Sullivan Date: Sun, 2 Feb 2025 11:26:53 -0500 Subject: add l476 implementation --- .../DSP/Source/StatisticsFunctions/arm_var_q15.c | 394 +++++++++------------ 1 file changed, 164 insertions(+), 230 deletions(-) (limited to 'Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q15.c') diff --git a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q15.c b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q15.c index f020c88..4218522 100644 --- a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q15.c +++ b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_var_q15.c @@ -1,230 +1,164 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_var_q15.c - * Description: Variance of an array of Q15 type - * - * $Date: 23 April 2021 - * $Revision: V1.9.0 - * - * Target Processor: Cortex-M and Cortex-A cores - * -------------------------------------------------------------------- */ -/* - * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved. - * - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the License); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an AS IS BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "dsp/statistics_functions.h" - -/** - @ingroup groupStats - */ - -/** - @addtogroup 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. - */ -#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) -void arm_var_q15( - const q15_t * pSrc, - uint32_t blockSize, - q15_t * pResult) -{ - uint32_t blkCnt; /* loop counters */ - q15x8_t vecSrc; - q63_t sumOfSquares = 0LL; - q63_t meanOfSquares, squareOfMean; /* square of mean and mean of square */ - q63_t sum = 0LL; - q15_t in; - - if (blockSize <= 1U) { - *pResult = 0; - return; - } - - - blkCnt = blockSize >> 3; - while (blkCnt > 0U) - { - vecSrc = vldrhq_s16(pSrc); - /* 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. */ - - sumOfSquares = vmlaldavaq_s16(sumOfSquares, vecSrc, vecSrc); - sum = vaddvaq_s16(sum, vecSrc); - - blkCnt --; - pSrc += 8; - } - - /* Tail */ - blkCnt = blockSize & 7; - 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 of the input samples - * and then store the result in a temporary variable, meanOfSquares. */ - meanOfSquares = arm_div_q63_to_q31(sumOfSquares, (blockSize - 1U)); - - /* Compute square of mean */ - squareOfMean = arm_div_q63_to_q31((q63_t)sum * sum, (q31_t)(blockSize * (blockSize - 1U))); - - /* mean of the squares minus the square of the mean. */ - *pResult = (meanOfSquares - squareOfMean) >> 15; -} -#else -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 (&pSrc); - sumOfSquares = __SMLALD(in32, in32, sumOfSquares); - sum += ((in32 << 16U) >> 16U); - sum += (in32 >> 16U); - - in32 = read_q15x2_ia (&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; -} -#endif /* defined(ARM_MATH_MVEI) */ - -/** - @} end of variance group - */ +/* ---------------------------------------------------------------------- + * 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 + */ -- cgit v1.2.3