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 */
58 #if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
59
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)60 ARM_DSP_ATTRIBUTE void arm_copy_f32(
61 const float32_t * pSrc,
62 float32_t * pDst,
63 uint32_t blockSize)
64 {
65 uint32_t blkCnt;
66 blkCnt = blockSize >> 2U;
67
68 /* Compute 4 outputs at a time */
69 while (blkCnt > 0U)
70 {
71 vstrwq_f32(pDst, vldrwq_f32(pSrc));
72 /*
73 * Decrement the blockSize loop counter
74 * Advance vector source and destination pointers
75 */
76 pSrc += 4;
77 pDst += 4;
78 blkCnt --;
79 }
80
81 blkCnt = blockSize & 3;
82
83 while (blkCnt > 0U)
84 {
85 /* C = A */
86
87 /* Copy and store result in destination buffer */
88 *pDst++ = *pSrc++;
89
90 /* Decrement loop counter */
91 blkCnt--;
92 }
93
94 }
95
96 #else
97 #if defined(ARM_MATH_NEON_EXPERIMENTAL)
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)98 ARM_DSP_ATTRIBUTE void arm_copy_f32(
99 const float32_t * pSrc,
100 float32_t * pDst,
101 uint32_t blockSize)
102 {
103 uint32_t blkCnt; /* loop counter */
104
105 float32x4_t inV;
106
107 blkCnt = blockSize >> 2U;
108
109 /* Compute 4 outputs at a time.
110 ** a second loop below computes the remaining 1 to 3 samples. */
111 while (blkCnt > 0U)
112 {
113 /* C = A */
114 /* Copy and then store the results in the destination buffer */
115 inV = vld1q_f32(pSrc);
116 vst1q_f32(pDst, inV);
117 pSrc += 4;
118 pDst += 4;
119
120 /* Decrement the loop counter */
121 blkCnt--;
122 }
123
124 /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
125 ** No loop unrolling is used. */
126 blkCnt = blockSize & 3;
127
128 while (blkCnt > 0U)
129 {
130 /* C = A */
131 /* Copy and then store the results in the destination buffer */
132 *pDst++ = *pSrc++;
133
134 /* Decrement the loop counter */
135 blkCnt--;
136 }
137 }
138 #else
arm_copy_f32(const float32_t * pSrc,float32_t * pDst,uint32_t blockSize)139 ARM_DSP_ATTRIBUTE void arm_copy_f32(
140 const float32_t * pSrc,
141 float32_t * pDst,
142 uint32_t blockSize)
143 {
144 uint32_t blkCnt; /* Loop counter */
145
146 #if defined (ARM_MATH_LOOPUNROLL)
147
148 /* Loop unrolling: Compute 4 outputs at a time */
149 blkCnt = blockSize >> 2U;
150
151 while (blkCnt > 0U)
152 {
153 /* C = A */
154
155 /* Copy and store result in destination buffer */
156 *pDst++ = *pSrc++;
157 *pDst++ = *pSrc++;
158 *pDst++ = *pSrc++;
159 *pDst++ = *pSrc++;
160
161 /* Decrement loop counter */
162 blkCnt--;
163 }
164
165 /* Loop unrolling: Compute remaining outputs */
166 blkCnt = blockSize % 0x4U;
167
168 #else
169
170 /* Initialize blkCnt with number of samples */
171 blkCnt = blockSize;
172
173 #endif /* #if defined (ARM_MATH_LOOPUNROLL) */
174
175 while (blkCnt > 0U)
176 {
177 /* C = A */
178
179 /* Copy and store result in destination buffer */
180 *pDst++ = *pSrc++;
181
182 /* Decrement loop counter */
183 blkCnt--;
184 }
185 }
186 #endif /* #if defined(ARM_MATH_NEON) */
187 #endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
188
189 /**
190 @} end of BasicCopy group
191 */
192
