120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* ----------------------------------------------------------------------
|
|
* 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"
|
|
|
|
|
|
/**
|
|
@ingroup groupFastMath
|
|
*/
|
|
|
|
|
|
/**
|
|
@defgroup vlog Vector Log
|
|
|
|
Compute the log values of a vector of samples.
|
|
|
|
*/
|
|
|
|
/**
|
|
@addtogroup vlog
|
|
@{
|
|
*/
|
|
|
|
#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_vlog_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 = vlogq_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 = vlogq_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++ = logf(*pSrc++);
|
|
|
|
/* Decrement loop counter */
|
|
blkCnt--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
@} end of vlog group
|
|
*/
|