1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_abs_f64.c
4 * Description: Floating-point vector absolute value
5 *
6 * $Date: 13 September 2021
7 * $Revision: V1.10.0
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/basic_math_functions.h"
30 #include <math.h>
31
32 /**
33 @ingroup groupMath
34 */
35
36 /**
37 @addtogroup BasicAbs
38 @{
39 */
40
41 /**
42 @brief Floating-point vector absolute value.
43 @param[in] pSrc points to the input vector
44 @param[out] pDst points to the output vector
45 @param[in] blockSize number of samples in each vector
46 */
47
arm_abs_f64(const float64_t * pSrc,float64_t * pDst,uint32_t blockSize)48 void arm_abs_f64(
49 const float64_t * pSrc,
50 float64_t * pDst,
51 uint32_t blockSize)
52 {
53 uint32_t blkCnt; /* Loop counter */
54
55 /* Initialize blkCnt with number of samples */
56 blkCnt = blockSize;
57
58 while (blkCnt > 0U)
59 {
60 /* C = |A| */
61
62 /* Calculate absolute and store result in destination buffer. */
63 *pDst++ = fabs(*pSrc++);
64
65 /* Decrement loop counter */
66 blkCnt--;
67 }
68
69 }
70
71 /**
72 @} end of BasicAbs group
73 */
74
