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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/DistanceFunctions/arm_minkowski_distance_f16.c |
initial commit
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_minkowski_distance_f16.c')
-rw-r--r-- | Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_minkowski_distance_f16.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_minkowski_distance_f16.c b/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_minkowski_distance_f16.c new file mode 100644 index 0000000..c5300ab --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/DistanceFunctions/arm_minkowski_distance_f16.c @@ -0,0 +1,137 @@ + +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_minkowski_distance_f16.c + * Description: Minkowski distance between two vectors + * + * $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/distance_functions_f16.h" + +#if defined(ARM_FLOAT16_SUPPORTED) + +#include <limits.h> +#include <math.h> + +/** + @ingroup FloatDist + */ + +/** + @defgroup Minkowski Minkowski distance + + Minkowski distance + */ + +/** + @addtogroup Minkowski + @{ + */ + + +/** + * @brief Minkowski distance between two vectors + * + * @param[in] pA First vector + * @param[in] pB Second vector + * @param[in] order Distance order + * @param[in] blockSize Number of samples + * @return distance + * + */ + +#if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE) + +#include "arm_helium_utils.h" +#include "arm_vec_math_f16.h" + +float16_t arm_minkowski_distance_f16(const float16_t *pA,const float16_t *pB, int32_t order, uint32_t blockSize) +{ + uint32_t blkCnt; + f16x8_t a, b, tmpV, sumV; + + sumV = vdupq_n_f16(0.0f); + + blkCnt = blockSize >> 3; + while (blkCnt > 0U) { + a = vld1q(pA); + b = vld1q(pB); + + tmpV = vabdq(a, b); + tmpV = vpowq_f16(tmpV, vdupq_n_f16(order)); + sumV = vaddq(sumV, tmpV); + + pA += 8; + pB += 8; + blkCnt--; + } + + /* + * tail + * (will be merged thru tail predication) + */ + blkCnt = blockSize & 7; + if (blkCnt > 0U) { + mve_pred16_t p0 = vctp16q(blkCnt); + + a = vldrhq_z_f16(pA, p0); + b = vldrhq_z_f16(pB, p0); + + tmpV = vabdq(a, b); + tmpV = vpowq_f16(tmpV, vdupq_n_f16(order)); + sumV = vaddq_m(sumV, sumV, tmpV, p0); + } + + return (powf((float32_t)vecAddAcrossF16Mve(sumV), (1.0f / (float32_t) order))); +} + + +#else + + +float16_t arm_minkowski_distance_f16(const float16_t *pA,const float16_t *pB, int32_t order, uint32_t blockSize) +{ + _Float16 sum; + uint32_t i; + + sum = 0.0f16; + for(i=0; i < blockSize; i++) + { + sum += (_Float16)powf(fabsf((float32_t)((_Float16)pA[i] - (_Float16)pB[i])),order); + } + + + return(_Float16)(powf((float32_t)sum,(1.0f/(float32_t)order))); + +} + +#endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */ + + +/** + * @} end of Minkowski group + */ + +#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */ + |