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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q15.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q15.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q15.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q15.c new file mode 100644 index 0000000..cb42609 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q15.c @@ -0,0 +1,172 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_dot_prod_q15.c + * Description: Q15 dot product + * + * $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/basic_math_functions.h" + +/** + @ingroup groupMath + */ + +/** + @addtogroup BasicDotProd + @{ + */ + +/** + @brief Dot product of 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 each vector + @param[out] result output result returned here + @return none + + @par Scaling and Overflow Behavior + The intermediate multiplications are in 1.15 x 1.15 = 2.30 format and these + results are added to a 64-bit accumulator in 34.30 format. + Nonsaturating additions are used and given that there are 33 guard bits in the accumulator + there is no risk of overflow. + The return result is in 34.30 format. + */ +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) + +#include "arm_helium_utils.h" + +void arm_dot_prod_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t blockSize, + q63_t * result) +{ + uint32_t blkCnt; /* loop counters */ + q15x8_t vecA; + q15x8_t vecB; + q63_t sum = 0LL; + + /* Compute 8 outputs at a time */ + blkCnt = blockSize >> 3; + while (blkCnt > 0U) + { + /* + * C = A[0]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] + * Calculate dot product and then store the result in a temporary buffer. + */ + vecA = vld1q(pSrcA); + vecB = vld1q(pSrcB); + sum = vmlaldavaq(sum, vecA, vecB); + /* + * Decrement the blockSize loop counter + */ + blkCnt--; + /* + * advance vector source and destination pointers + */ + pSrcA += 8; + pSrcB += 8; + } + /* + * tail + */ + blkCnt = blockSize & 7; + if (blkCnt > 0U) + { + mve_pred16_t p0 = vctp16q(blkCnt); + vecA = vld1q(pSrcA); + vecB = vld1q(pSrcB); + sum = vmlaldavaq_p(sum, vecA, vecB, p0); + } + + *result = sum; +} + +#else +void arm_dot_prod_q15( + const q15_t * pSrcA, + const q15_t * pSrcB, + uint32_t blockSize, + q63_t * result) +{ + uint32_t blkCnt; /* Loop counter */ + q63_t sum = 0; /* Temporary return variable */ + +#if defined (ARM_MATH_LOOPUNROLL) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = blockSize >> 2U; + + while (blkCnt > 0U) + { + /* C = A[0]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] */ + +#if defined (ARM_MATH_DSP) + /* Calculate dot product and store result in a temporary buffer. */ + sum = __SMLALD(read_q15x2_ia (&pSrcA), read_q15x2_ia (&pSrcB), sum); + sum = __SMLALD(read_q15x2_ia (&pSrcA), read_q15x2_ia (&pSrcB), sum); +#else + sum += (q63_t)((q31_t) *pSrcA++ * *pSrcB++); + sum += (q63_t)((q31_t) *pSrcA++ * *pSrcB++); + sum += (q63_t)((q31_t) *pSrcA++ * *pSrcB++); + sum += (q63_t)((q31_t) *pSrcA++ * *pSrcB++); +#endif + + /* 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]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] */ + + /* Calculate dot product and store result in a temporary buffer. */ +//#if defined (ARM_MATH_DSP) +// sum = __SMLALD(*pSrcA++, *pSrcB++, sum); +//#else + sum += (q63_t)((q31_t) *pSrcA++ * *pSrcB++); +//#endif + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store result in destination buffer in 34.30 format */ + *result = sum; +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of BasicDotProd group + */ |