1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_vlog_f64.c
4 * Description: Fast vectorized log
5 *
6 * $Date: 10 August 2022
7 * $Revision: V1.10.1
8 *
9 * Target Processor: Cortex-M and Cortex-A cores
10 * -------------------------------------------------------------------- */
11 /*
12 * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
13 *
14 * SPDX-License-Identifier: Apache-2.0
15 *
16 * Licensed under the Apache License, Version 2.0 (the License); you may
17 * not use this file except in compliance with the License.
18 * You may obtain a copy of the License at
19 *
20 * www.apache.org/licenses/LICENSE-2.0
21 *
22 * Unless required by applicable law or agreed to in writing, software
23 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
24 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25 * See the License for the specific language governing permissions and
26 * limitations under the License.
27 */
28
29 #include "dsp/fast_math_functions.h"
30 #include "arm_common_tables.h"
31
arm_vlog_f64(const float64_t * pSrc,float64_t * pDst,uint32_t blockSize)32 void arm_vlog_f64(
33 const float64_t * pSrc,
34 float64_t * pDst,
35 uint32_t blockSize)
36 {
37 uint32_t blkCnt;
38
39 blkCnt = blockSize;
40
41
42 while (blkCnt > 0U)
43 {
44 /* C = log(A) */
45
46 /* Calculate log and store result in destination buffer. */
47 *pDst++ = log(*pSrc++);
48
49 /* Decrement loop counter */
50 blkCnt--;
51 }
52 }
53
