1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_copy_q7.c
4 * Description: Copies the elements of a Q7 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/support_functions.h"
30
31 /**
32 @ingroup groupSupport
33 */
34
35 /**
36 @addtogroup copy
37 @{
38 */
39
40 /**
41 @brief Copies the elements of a Q7 vector.
42 @param[in] pSrc points to input vector
43 @param[out] pDst points to output vector
44 @param[in] blockSize number of samples in each vector
45 @return none
46 */
47 #if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
arm_copy_q7(const q7_t * pSrc,q7_t * pDst,uint32_t blockSize)48 void arm_copy_q7(
49 const q7_t * pSrc,
50 q7_t * pDst,
51 uint32_t blockSize)
52 {
53
54 uint32_t blkCnt;
55
56 blkCnt = blockSize >> 4;
57 while (blkCnt > 0U)
58 {
59
60 vstrbq_s8(pDst,vldrbq_s8(pSrc));
61 /*
62 * Decrement the blockSize loop counter
63 * Advance vector source and destination pointers
64 */
65 pSrc += 16;
66 pDst += 16;
67 blkCnt --;
68 }
69
70 blkCnt = blockSize & 0xF;
71 while (blkCnt > 0U)
72 {
73 /* C = A */
74
75 /* Copy and store result in destination buffer */
76 *pDst++ = *pSrc++;
77
78 /* Decrement loop counter */
79 blkCnt--;
80 }
81 }
82
83 #else
arm_copy_q7(const q7_t * pSrc,q7_t * pDst,uint32_t blockSize)84 void arm_copy_q7(
85 const q7_t * pSrc,
86 q7_t * pDst,
87 uint32_t blockSize)
88 {
89 uint32_t blkCnt; /* Loop counter */
90
91 #if defined (ARM_MATH_LOOPUNROLL)
92
93 /* Loop unrolling: Compute 4 outputs at a time */
94 blkCnt = blockSize >> 2U;
95
96 while (blkCnt > 0U)
97 {
98 /* C = A */
99
100 /* read 4 samples at a time */
101 write_q7x4_ia (&pDst, read_q7x4_ia ((q7_t **) &pSrc));
102
103 /* Decrement loop counter */
104 blkCnt--;
105 }
106
107 /* Loop unrolling: Compute remaining outputs */
108 blkCnt = blockSize % 0x4U;
109
110 #else
111
112 /* Initialize blkCnt with number of samples */
113 blkCnt = blockSize;
114
115 #endif /* #if defined (ARM_MATH_LOOPUNROLL) */
116
117 while (blkCnt > 0U)
118 {
119 /* C = A */
120
121 /* Copy and store result in destination buffer */
122 *pDst++ = *pSrc++;
123
124 /* Decrement loop counter */
125 blkCnt--;
126 }
127 }
128 #endif /* defined(ARM_MATH_MVEI) */
129
130 /**
131 @} end of BasicCopy group
132 */
133
