1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_logsumexp_f32.c
4 * Description: LogSumExp
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.h"
30 #include <limits.h>
31 #include <math.h>
32
33
34 /**
35 * @addtogroup LogSumExp
36 * @{
37 */
38
39
40 /**
41 * @brief Dot product with log arithmetic
42 *
43 * Vectors are containing the log of the samples
44 *
45 * @param[in] *pSrcA points to the first input vector
46 * @param[in] *pSrcB points to the second input vector
47 * @param[in] blockSize number of samples in each vector
48 * @param[in] *pTmpBuffer temporary buffer of length blockSize
49 * @return The log of the dot product.
50 *
51 */
52
53
arm_logsumexp_dot_prod_f32(const float32_t * pSrcA,const float32_t * pSrcB,uint32_t blockSize,float32_t * pTmpBuffer)54 float32_t arm_logsumexp_dot_prod_f32(const float32_t * pSrcA,
55 const float32_t * pSrcB,
56 uint32_t blockSize,
57 float32_t *pTmpBuffer)
58 {
59 float32_t result;
60 arm_add_f32((float32_t*)pSrcA, (float32_t*)pSrcB, pTmpBuffer, blockSize);
61
62 result = arm_logsumexp_f32(pTmpBuffer, blockSize);
63 return(result);
64 }
65
66 /**
67 * @} end of LogSumExp group
68 */
69