1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_cmplx_mag_f64.c
4 * Description: Floating-point complex magnitude
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/complex_math_functions.h"
30
31 /**
32 @ingroup groupCmplxMath
33 */
34
35
36
37 /**
38 @addtogroup cmplx_mag
39 @{
40 */
41
42 /**
43 @brief Floating-point complex magnitude.
44 @param[in] pSrc points to input vector
45 @param[out] pDst points to output vector
46 @param[in] numSamples number of samples in each vector
47 */
arm_cmplx_mag_f64(const float64_t * pSrc,float64_t * pDst,uint32_t numSamples)48 ARM_DSP_ATTRIBUTE void arm_cmplx_mag_f64(
49 const float64_t * pSrc,
50 float64_t * pDst,
51 uint32_t numSamples)
52 {
53 uint32_t blkCnt; /* loop counter */
54 float64_t real, imag; /* Temporary variables to hold input values */
55
56 /* Initialize blkCnt with number of samples */
57 blkCnt = numSamples;
58
59 while (blkCnt > 0U)
60 {
61 /* C[0] = sqrt(A[0] * A[0] + A[1] * A[1]) */
62
63 real = *pSrc++;
64 imag = *pSrc++;
65
66 /* store result in destination buffer. */
67 *pDst++ = sqrt((real * real) + (imag * imag));
68
69 /* Decrement loop counter */
70 blkCnt--;
71 }
72
73 }
74
75 /**
76 @} end of cmplx_mag group
77 */
78
