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/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_vlog_f16.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_f16.h"
#if defined(ARM_FLOAT16_SUPPORTED)
#include "arm_common_tables.h"
#include "arm_vec_math_f16.h"
void arm_vexp_f16(
const float16_t * pSrc,
float16_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt;
#if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE)
f16x8_t src;
f16x8_t dst;
blkCnt = blockSize >> 3;
while (blkCnt > 0U)
{
src = vld1q(pSrc);
dst = vexpq_f16(src);
vst1q(pDst, dst);
pSrc += 8;
pDst += 8;
/* Decrement loop counter */
blkCnt--;
}
blkCnt = blockSize & 7;
#else
blkCnt = blockSize;
#endif
while (blkCnt > 0U)
{
/* C = log(A) */
/* Calculate log and store result in destination buffer. */
*pDst++ = (_Float16)expf((float32_t)*pSrc++);
/* Decrement loop counter */
blkCnt--;
}
}
#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */
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