1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_copy_f32.c
4 * Description: Copies 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/support_functions.h"
30
31 /**
32 @ingroup groupSupport
33 */
34
35 /**
36 @defgroup copy Vector Copy
37
38 Copies sample by sample from source vector to destination vector.
39
40 <pre>
41 pDst[n] = pSrc[n]; 0 <= n < blockSize.
42 </pre>
43
44 There are separate functions for floating point, Q31, Q15, and Q7 data types.
45 */
46
47 /**
48 @addtogroup copy
49 @{
50 */
51
52 /**
53 @brief Copies the elements of a floating-point vector.
54 @param[in] pSrc points to input vector
55 @param[out] pDst points to output vector
56 @param[in] blockSize number of samples in each vector
57 @return none
58 */
59 #if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
60
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)61 void arm_copy_f32(
62 const float32_t * pSrc,
63 float32_t * pDst,
64 uint32_t blockSize)
65 {
66 uint32_t blkCnt;
67 blkCnt = blockSize >> 2U;
68
69 /* Compute 4 outputs at a time */
70 while (blkCnt > 0U)
71 {
72 vstrwq_f32(pDst, vldrwq_f32(pSrc));
73 /*
74 * Decrement the blockSize loop counter
75 * Advance vector source and destination pointers
76 */
77 pSrc += 4;
78 pDst += 4;
79 blkCnt --;
80 }
81
82 blkCnt = blockSize & 3;
83
84 while (blkCnt > 0U)
85 {
86 /* C = A */
87
88 /* Copy and store result in destination buffer */
89 *pDst++ = *pSrc++;
90
91 /* Decrement loop counter */
92 blkCnt--;
93 }
94
95 }
96
97 #else
98 #if defined(ARM_MATH_NEON_EXPERIMENTAL)
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)99 void arm_copy_f32(
100 const float32_t * pSrc,
101 float32_t * pDst,
102 uint32_t blockSize)
103 {
104 uint32_t blkCnt; /* loop counter */
105
106 float32x4_t inV;
107
108 blkCnt = blockSize >> 2U;
109
110 /* Compute 4 outputs at a time.
111 ** a second loop below computes the remaining 1 to 3 samples. */
112 while (blkCnt > 0U)
113 {
114 /* C = A */
115 /* Copy and then store the results in the destination buffer */
116 inV = vld1q_f32(pSrc);
117 vst1q_f32(pDst, inV);
118 pSrc += 4;
119 pDst += 4;
120
121 /* Decrement the loop counter */
122 blkCnt--;
123 }
124
125 /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
126 ** No loop unrolling is used. */
127 blkCnt = blockSize & 3;
128
129 while (blkCnt > 0U)
130 {
131 /* C = A */
132 /* Copy and then store the results in the destination buffer */
133 *pDst++ = *pSrc++;
134
135 /* Decrement the loop counter */
136 blkCnt--;
137 }
138 }
139 #else
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)140 void arm_copy_f32(
141 const float32_t * pSrc,
142 float32_t * pDst,
143 uint32_t blockSize)
144 {
145 uint32_t blkCnt; /* Loop counter */
146
147 #if defined (ARM_MATH_LOOPUNROLL)
148
149 /* Loop unrolling: Compute 4 outputs at a time */
150 blkCnt = blockSize >> 2U;
151
152 while (blkCnt > 0U)
153 {
154 /* C = A */
155
156 /* Copy and store result in destination buffer */
157 *pDst++ = *pSrc++;
158 *pDst++ = *pSrc++;
159 *pDst++ = *pSrc++;
160 *pDst++ = *pSrc++;
161
162 /* Decrement loop counter */
163 blkCnt--;
164 }
165
166 /* Loop unrolling: Compute remaining outputs */
167 blkCnt = blockSize % 0x4U;
168
169 #else
170
171 /* Initialize blkCnt with number of samples */
172 blkCnt = blockSize;
173
174 #endif /* #if defined (ARM_MATH_LOOPUNROLL) */
175
176 while (blkCnt > 0U)
177 {
178 /* C = A */
179
180 /* Copy and store result in destination buffer */
181 *pDst++ = *pSrc++;
182
183 /* Decrement loop counter */
184 blkCnt--;
185 }
186 }
187 #endif /* #if defined(ARM_MATH_NEON) */
188 #endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
189
190 /**
191 @} end of BasicCopy group
192 */
193