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https://github.com/IcedRooibos/py32f0-template.git
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120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: arm_vlog_f32.c
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* Description: Fast vectorized log
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*
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* $Date: 23 April 2021
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* $Revision: V1.9.0
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*
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* Target Processor: Cortex-M and Cortex-A cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "dsp/fast_math_functions.h"
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#include "arm_common_tables.h"
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/**
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@ingroup groupFastMath
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*/
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/**
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@defgroup vlog Vector Log
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Compute the log values of a vector of samples.
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*/
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/**
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@addtogroup vlog
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@{
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*/
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#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM) || defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
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#include "arm_vec_math.h"
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#endif
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void arm_vlog_f32(
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const float32_t * pSrc,
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float32_t * pDst,
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uint32_t blockSize)
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{
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uint32_t blkCnt;
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#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM)) && !defined(ARM_MATH_AUTOVECTORIZE)
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f32x4_t src;
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f32x4_t dst;
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blkCnt = blockSize >> 2;
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while (blkCnt > 0U)
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{
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src = vld1q(pSrc);
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dst = vlogq_f32(src);
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vst1q(pDst, dst);
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pSrc += 4;
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pDst += 4;
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/* Decrement loop counter */
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blkCnt--;
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}
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blkCnt = blockSize & 3;
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#else
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#if (defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
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f32x4_t src;
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f32x4_t dst;
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blkCnt = blockSize >> 2;
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while (blkCnt > 0U)
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{
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src = vld1q_f32(pSrc);
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dst = vlogq_f32(src);
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vst1q_f32(pDst, dst);
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pSrc += 4;
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pDst += 4;
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/* Decrement loop counter */
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blkCnt--;
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}
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blkCnt = blockSize & 3;
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#else
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blkCnt = blockSize;
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#endif
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#endif
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while (blkCnt > 0U)
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{
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/* C = log(A) */
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/* Calculate log and store result in destination buffer. */
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*pDst++ = logf(*pSrc++);
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/* Decrement loop counter */
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blkCnt--;
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}
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}
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/**
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@} end of vlog group
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*/
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