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/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_vlog_f32.c
* Description: Fast vectorized log
*
* $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/fast_math_functions.h"
#include "arm_common_tables.h"
#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM) || defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
#include "arm_vec_math.h"
#endif
void arm_vexp_f32(
const float32_t * pSrc,
float32_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt;
#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM)) && !defined(ARM_MATH_AUTOVECTORIZE)
f32x4_t src;
f32x4_t dst;
blkCnt = blockSize >> 2;
while (blkCnt > 0U)
{
src = vld1q(pSrc);
dst = vexpq_f32(src);
vst1q(pDst, dst);
pSrc += 4;
pDst += 4;
/* Decrement loop counter */
blkCnt--;
}
blkCnt = blockSize & 3;
#else
#if (defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
f32x4_t src;
f32x4_t dst;
blkCnt = blockSize >> 2;
while (blkCnt > 0U)
{
src = vld1q_f32(pSrc);
dst = vexpq_f32(src);
vst1q_f32(pDst, dst);
pSrc += 4;
pDst += 4;
/* Decrement loop counter */
blkCnt--;
}
blkCnt = blockSize & 3;
#else
blkCnt = blockSize;
#endif
#endif
while (blkCnt > 0U)
{
/* C = log(A) */
/* Calculate log and store result in destination buffer. */
*pDst++ = expf(*pSrc++);
/* Decrement loop counter */
blkCnt--;
}
}
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