diff options
author | Clyne Sullivan <clyne@bitgloo.com> | 2025-01-29 21:34:25 -0500 |
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committer | Clyne Sullivan <clyne@bitgloo.com> | 2025-01-29 21:34:25 -0500 |
commit | 5b81bc8ccbd342b8566d88fc9f17a73aec03b5b6 (patch) | |
tree | cc57486912cfa74c6440d8b97c28f451ec787d78 /Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c |
initial commit
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c')
-rw-r--r-- | Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c new file mode 100644 index 0000000..62b8657 --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c @@ -0,0 +1,228 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_dot_prod_f32.c + * Description: Floating-point dot product + * + * $Date: 05 October 2021 + * $Revision: V1.9.1 + * + * 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 + */ + +/** + @defgroup BasicDotProd Vector Dot Product + + Computes the dot product of two vectors. + The vectors are multiplied element-by-element and then summed. + + <pre> + sum = pSrcA[0]*pSrcB[0] + pSrcA[1]*pSrcB[1] + ... + pSrcA[blockSize-1]*pSrcB[blockSize-1] + </pre> + + There are separate functions for floating-point, Q7, Q15, and Q31 data types. + */ + +/** + @addtogroup BasicDotProd + @{ + */ + +/** + @brief Dot product of floating-point 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 + */ + +#if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) + +#include "arm_helium_utils.h" + + +void arm_dot_prod_f32( + const float32_t * pSrcA, + const float32_t * pSrcB, + uint32_t blockSize, + float32_t * result) +{ + f32x4_t vecA, vecB; + f32x4_t vecSum; + uint32_t blkCnt; + float32_t sum = 0.0f; + vecSum = vdupq_n_f32(0.0f); + + /* 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] + * Calculate dot product and then store the result in a temporary buffer. + * and advance vector source and destination pointers + */ + vecA = vld1q(pSrcA); + pSrcA += 4; + + vecB = vld1q(pSrcB); + pSrcB += 4; + + vecSum = vfmaq(vecSum, vecA, vecB); + /* + * Decrement the blockSize loop counter + */ + blkCnt --; + } + + + blkCnt = blockSize & 3; + if (blkCnt > 0U) + { + /* C = A[0]* B[0] + A[1]* B[1] + A[2]* B[2] + .....+ A[blockSize-1]* B[blockSize-1] */ + + mve_pred16_t p0 = vctp32q(blkCnt); + vecA = vld1q(pSrcA); + vecB = vld1q(pSrcB); + vecSum = vfmaq_m(vecSum, vecA, vecB, p0); + } + + sum = vecAddAcrossF32Mve(vecSum); + + /* Store result in destination buffer */ + *result = sum; + +} + +#else + +void arm_dot_prod_f32( + const float32_t * pSrcA, + const float32_t * pSrcB, + uint32_t blockSize, + float32_t * result) +{ + uint32_t blkCnt; /* Loop counter */ + float32_t sum = 0.0f; /* Temporary return variable */ + +#if defined(ARM_MATH_NEON) && !defined(ARM_MATH_AUTOVECTORIZE) + f32x4_t vec1; + f32x4_t vec2; + f32x4_t accum = vdupq_n_f32(0); +#if !defined(__aarch64__) + f32x2_t tmp = vdup_n_f32(0); +#endif + + /* Compute 4 outputs at a time */ + blkCnt = blockSize >> 2U; + + vec1 = vld1q_f32(pSrcA); + vec2 = vld1q_f32(pSrcB); + + 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. */ + + accum = vmlaq_f32(accum, vec1, vec2); + + /* Increment pointers */ + pSrcA += 4; + pSrcB += 4; + + vec1 = vld1q_f32(pSrcA); + vec2 = vld1q_f32(pSrcB); + + /* Decrement the loop counter */ + blkCnt--; + } + +#if defined(__aarch64__) + sum = vpadds_f32(vpadd_f32(vget_low_f32(accum), vget_high_f32(accum))); +#else + tmp = vpadd_f32(vget_low_f32(accum), vget_high_f32(accum)); + sum = vget_lane_f32(tmp, 0) + vget_lane_f32(tmp, 1); + +#endif + + /* Tail */ + blkCnt = blockSize & 0x3; + +#else +#if defined (ARM_MATH_LOOPUNROLL) && !defined(ARM_MATH_AUTOVECTORIZE) + + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = blockSize >> 2U; + + /* First part of the processing with loop unrolling. Compute 4 outputs at a time. + ** a second loop below computes the remaining 1 to 3 samples. */ + 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. */ + sum += (*pSrcA++) * (*pSrcB++); + + sum += (*pSrcA++) * (*pSrcB++); + + sum += (*pSrcA++) * (*pSrcB++); + + sum += (*pSrcA++) * (*pSrcB++); + + /* 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) */ +#endif /* #if defined(ARM_MATH_NEON) */ + + 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. */ + sum += (*pSrcA++) * (*pSrcB++); + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store result in destination buffer */ + *result = sum; +} + +#endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */ +/** + @} end of BasicDotProd group + */ |