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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c new file mode 100644 index 0000000..2de4e27 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_q7.c @@ -0,0 +1,191 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_dot_prod_q7.c + * Description: Q7 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 Q7 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 1.7 x 1.7 = 2.14 format and these + results are added to an accumulator in 18.14 format. + Nonsaturating additions are used and there is no danger of wrap around as long as + the vectors are less than 2^18 elements long. + The return result is in 18.14 format. + */ + +#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE) + +#include "arm_helium_utils.h" + +void arm_dot_prod_q7( + const q7_t * pSrcA, + const q7_t * pSrcB, + uint32_t blockSize, + q31_t * result) +{ + uint32_t blkCnt; /* loop counters */ + q7x16_t vecA; + q7x16_t vecB; + q31_t sum = 0; + + /* Compute 16 outputs at a time */ + blkCnt = blockSize >> 4; + 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 = vmladavaq(sum, vecA, vecB); + /* + * Decrement the blockSize loop counter + */ + blkCnt--; + /* + * advance vector source and destination pointers + */ + pSrcA += 16; + pSrcB += 16; + } + /* + * tail + */ + blkCnt = blockSize & 0xF; + if (blkCnt > 0U) + { + mve_pred16_t p0 = vctp8q(blkCnt); + vecA = vld1q(pSrcA); + vecB = vld1q(pSrcB); + sum = vmladavaq_p(sum, vecA, vecB, p0); + } + + *result = sum; +} +#else +void arm_dot_prod_q7( + const q7_t * pSrcA, + const q7_t * pSrcB, + uint32_t blockSize, + q31_t * result) +{ + uint32_t blkCnt; /* Loop counter */ + q31_t sum = 0; /* Temporary return variable */ + +#if defined (ARM_MATH_LOOPUNROLL) + +#if defined (ARM_MATH_DSP) + q31_t input1, input2; /* Temporary variables */ + q31_t inA1, inA2, inB1, inB2; /* Temporary variables */ +#endif + + /* 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) + /* read 4 samples at a time from sourceA */ + input1 = read_q7x4_ia (&pSrcA); + /* read 4 samples at a time from sourceB */ + input2 = read_q7x4_ia (&pSrcB); + + /* extract two q7_t samples to q15_t samples */ + inA1 = __SXTB16(__ROR(input1, 8)); + /* extract reminaing two samples */ + inA2 = __SXTB16(input1); + /* extract two q7_t samples to q15_t samples */ + inB1 = __SXTB16(__ROR(input2, 8)); + /* extract reminaing two samples */ + inB2 = __SXTB16(input2); + + /* multiply and accumulate two samples at a time */ + sum = __SMLAD(inA1, inB1, sum); + sum = __SMLAD(inA2, inB2, sum); +#else + sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++); + sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++); + sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++); + sum += (q31_t) ((q15_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 = __SMLAD(*pSrcA++, *pSrcB++, sum); +//#else + sum += (q31_t) ((q15_t) *pSrcA++ * *pSrcB++); +//#endif + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store result in destination buffer in 18.14 format */ + *result = sum; +} +#endif /* defined(ARM_MATH_MVEI) */ + +/** + @} end of BasicDotProd group + */ |