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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_q15.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_q15.c b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_q15.c new file mode 100644 index 0000000..9e6f0c0 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_q15.c @@ -0,0 +1,175 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_mse_q15.c + * Description: Mean square error between two Q15 vectors + * + * $Date: 04 April 2022 + * $Revision: V1.10.0 + * + * Target Processor: Cortex-M and Cortex-A cores + * -------------------------------------------------------------------- */ +/* + * Copyright (C) 2010-2022 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 MSE + @{ + */ + +/** + @brief Mean square error between two Q15 vectors. + @param[in] pSrcA points to the first input vector + @param[in] pSrcB points to the second input vector + @param[in] blockSize number of samples in input vector + @param[out] pResult mean square error + @return none + */ +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) +void arm_mse_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t blockSize, + q15_t * pResult) +{ + uint32_t blkCnt; /* loop counters */ + q15x8_t vecSrcA,vecSrcB; + q63_t sum = 0LL; + + blkCnt = blockSize >> 3U; + while (blkCnt > 0U) + { + vecSrcA = vld1q(pSrcA); + vecSrcB = vld1q(pSrcB); + + vecSrcA = vshrq(vecSrcA,1); + vecSrcB = vshrq(vecSrcB,1); + + vecSrcA = vqsubq(vecSrcA,vecSrcB); + /* + * sum lanes + */ + sum = vmlaldavaq(sum, vecSrcA, vecSrcA); + + blkCnt--; + pSrcA += 8; + pSrcB += 8; + } + + /* + * tail + */ + blkCnt = blockSize & 7; + if (blkCnt > 0U) + { + mve_pred16_t p0 = vctp16q(blkCnt); + vecSrcA = vld1q(pSrcA); + vecSrcB = vld1q(pSrcB); + + vecSrcA = vshrq(vecSrcA,1); + vecSrcB = vshrq(vecSrcB,1); + + vecSrcA = vqsubq(vecSrcA,vecSrcB); + + sum = vmlaldavaq_p(sum, vecSrcA, vecSrcA, p0); + } + + + + *pResult = (q15_t) __SSAT((q31_t) (sum / blockSize)>>13, 16); +} +#else +void arm_mse_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t blockSize, + q15_t * pResult) +{ + uint32_t blkCnt; /* Loop counter */ + q63_t sum = 0; /* Temporary result storage */ + q15_t inA,inB; /* 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) + { + + inA = *pSrcA++ >> 1; + inB = *pSrcB++ >> 1; + inA = (q15_t) __SSAT(((q31_t) inA - (q31_t)inB), 16); + sum += (q63_t)((q31_t) inA * inA); + + inA = *pSrcA++ >> 1; + inB = *pSrcB++ >> 1; + inA = (q15_t) __SSAT(((q31_t) inA - (q31_t)inB), 16); + sum += (q63_t)((q31_t) inA * inA); + + inA = *pSrcA++ >> 1; + inB = *pSrcB++ >> 1; + inA = (q15_t) __SSAT(((q31_t) inA - (q31_t)inB), 16); + sum += (q63_t)((q31_t) inA * inA); + + inA = *pSrcA++ >> 1; + inB = *pSrcB++ >> 1; + inA = (q15_t) __SSAT(((q31_t) inA - (q31_t)inB), 16); + sum += (q63_t)((q31_t) inA * inA); + + /* 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) + { + + inA = *pSrcA++ >> 1; + inB = *pSrcB++ >> 1; + inA = (q15_t) __SSAT(((q31_t) inA - (q31_t)inB), 16); + sum += (q63_t)((q31_t) inA * inA); + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store result in q15 format */ + *pResult = (q15_t) __SSAT((q31_t) (sum / blockSize)>>13, 16); +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of MSE group + */ |