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_power_q31.c | 286 +++++++++------------ 1 file changed, 121 insertions(+), 165 deletions(-) (limited to 'Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_power_q31.c') diff --git a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_power_q31.c b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_power_q31.c index a39b3a7..aa51d0f 100644 --- a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_power_q31.c +++ b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_power_q31.c @@ -1,165 +1,121 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_power_q31.c - * Description: Sum of the squares of the elements of a Q31 vector - * - * $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 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. - */ -#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) -void arm_power_q31( - const q31_t * pSrc, - uint32_t blockSize, - q63_t * pResult) -{ - uint32_t blkCnt; /* loop counters */ - q31x4_t vecSrc; - q63_t sum = 0LL; - q31_t in; - - /* Compute 4 outputs at a time */ - blkCnt = blockSize >> 2U; - while (blkCnt > 0U) - { - vecSrc = vldrwq_s32(pSrc); - /* - * sum lanes - */ - sum = vrmlaldavhaq(sum, vecSrc, vecSrc); - - blkCnt --; - pSrc += 4; - } - - /* - * tail - */ - blkCnt = blockSize & 0x3; - 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) >> 8; - - /* Decrement loop counter */ - blkCnt--; - } - - *pResult = asrl(sum, 6); -} -#else -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; -} -#endif /* defined(ARM_MATH_MVEI) */ - -/** - @} end of power group - */ +/* ---------------------------------------------------------------------- + * 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 + */ -- cgit v1.2.3