diff options
Diffstat (limited to 'Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_f16.c')
| -rw-r--r-- | Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_f16.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_f16.c b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_f16.c new file mode 100644 index 0000000..3b192dd --- /dev/null +++ b/Drivers/CMSIS/DSP/Source/StatisticsFunctions/arm_mse_f16.c @@ -0,0 +1,203 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_mse_f16.c + * Description: Half floating point mean square error + * + * $Date: 05 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_f16.h" + +/** + @ingroup groupStats + */ + +/** + @addtogroup MSE + @{ + */ + +/** + @brief Mean square error between two half 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 input vector + @param[out] result mean square error + @return none + */ + +#if !defined(ARM_MATH_AUTOVECTORIZE) + +#if defined(ARM_MATH_MVE_FLOAT16) +#include "arm_helium_utils.h" + +void arm_mse_f16( + const float16_t * pSrcA, + const float16_t * pSrcB, + uint32_t blockSize, + float16_t * result) + +{ + float16x8_t vecA, vecB; + float16x8_t vecSum; + uint32_t blkCnt; + _Float16 sum = 0.0f16; + vecSum = vdupq_n_f16(0.0f16); + + blkCnt = (blockSize) >> 3; + while (blkCnt > 0U) + { + vecA = vld1q(pSrcA); + pSrcA += 8; + + vecB = vld1q(pSrcB); + pSrcB += 8; + + vecA = vsubq(vecA, vecB); + + vecSum = vfmaq(vecSum, vecA, vecA); + /* + * Decrement the blockSize loop counter + */ + blkCnt --; + } + + + blkCnt = (blockSize) & 7; + if (blkCnt > 0U) + { + mve_pred16_t p0 = vctp16q(blkCnt); + vecA = vld1q(pSrcA); + vecB = vld1q(pSrcB); + + vecA = vsubq(vecA, vecB); + vecSum = vfmaq_m(vecSum, vecA, vecA, p0); + } + + sum = vecAddAcrossF16Mve(vecSum); + + /* Store result in destination buffer */ + *result = (_Float16)sum / (_Float16)blockSize; + +} + +#endif + + +#endif /*#if !defined(ARM_MATH_AUTOVECTORIZE)*/ + + +#if defined(ARM_FLOAT16_SUPPORTED) + +#if (!defined(ARM_MATH_MVE_FLOAT16)) || defined(ARM_MATH_AUTOVECTORIZE) + + + +void arm_mse_f16( + const float16_t * pSrcA, + const float16_t * pSrcB, + uint32_t blockSize, + float16_t * result) + +{ + uint32_t blkCnt; /* Loop counter */ + _Float16 inA, inB; + _Float16 sum = 0.0f16; /* Temporary return variable */ +#if defined (ARM_MATH_LOOPUNROLL) + blkCnt = (blockSize) >> 3; + + + while (blkCnt > 0U) + { + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + /* Decrement loop counter */ + blkCnt--; + } + + + /* Loop unrolling: Compute remaining outputs */ + blkCnt = (blockSize) & 7; +#else + /* Initialize blkCnt with number of samples */ + blkCnt = blockSize; +#endif + while (blkCnt > 0U) + { + inA = *pSrcA++; + inB = *pSrcB++; + inA = (_Float16)inA - (_Float16)inB; + sum += (_Float16)inA * (_Float16)inA; + + /* Decrement loop counter */ + blkCnt--; + } + + /* Store result in destination buffer */ + *result = (_Float16)sum / (_Float16)blockSize; +} + +#endif /* end of test for vector instruction availability */ + +#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */ +/** + @} end of MSE group + */ |