1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_std_f16.c
4 * Description: Standard deviation of the elements of a floating-point vector
5 *
6 * $Date: 23 April 2021
7 * $Revision: V1.9.0
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/statistics_functions_f16.h"
30
31 #if defined(ARM_FLOAT16_SUPPORTED)
32
33
34 /**
35 @ingroup groupStats
36 */
37
38
39
40 /**
41 @addtogroup STD
42 @{
43 */
44
45 /**
46 @brief Standard deviation of the elements of a floating-point vector.
47 @param[in] pSrc points to the input vector
48 @param[in] blockSize number of samples in input vector
49 @param[out] pResult standard deviation value returned here
50 */
arm_std_f16(const float16_t * pSrc,uint32_t blockSize,float16_t * pResult)51 ARM_DSP_ATTRIBUTE void arm_std_f16(
52 const float16_t * pSrc,
53 uint32_t blockSize,
54 float16_t * pResult)
55 {
56 float16_t var;
57 arm_var_f16(pSrc,blockSize,&var);
58 arm_sqrt_f16(var, pResult);
59 }
60
61 /**
62 @} end of STD group
63 */
64
65 #endif /* #if defined(ARM_FLOAT16_SUPPORTED) */
66
67
