1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_q7_to_q31.c
* Description: Converts the elements of the Q7 vector to Q31 vector
*
* $Date: 23 April 2021
* $Revision: V1.9.0
*
* Target Processor: Cortex-M and Cortex-A cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "dsp/support_functions.h"
/**
@ingroup groupSupport
*/
/**
@addtogroup q7_to_x
@{
*/
/**
@brief Converts the elements of the Q7 vector to Q31 vector.
@param[in] pSrc points to the Q7 input vector
@param[out] pDst points to the Q31 output vector
@param[in] blockSize number of samples in each vector
@return none
@par Details
The equation used for the conversion process is:
<pre>
pDst[n] = (q31_t) pSrc[n] << 24; 0 <= n < blockSize.
</pre>
*/
#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
void arm_q7_to_q31(
const q7_t * pSrc,
q31_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt;
q31x4_t vecDst;
blkCnt = blockSize >> 2;
while (blkCnt > 0U)
{
/* C = (q31_t)A << 16 */
/* convert from q15 to q31 and then store the results in the destination buffer */
/* load q15 + 32-bit widening */
vecDst = vldrbq_s32((q7_t const *) pSrc);
vecDst = vshlq_n(vecDst, 24);
vstrwq_s32(pDst, vecDst);
/*
* Decrement the blockSize loop counter
* Advance vector source and destination pointers
*/
pDst += 4;
pSrc += 4;
blkCnt --;
}
blkCnt = blockSize & 3;
while (blkCnt > 0U)
{
/* C = (q31_t) A << 24 */
/* Convert from q7 to q31 and store result in destination buffer */
*pDst++ = (q31_t) *pSrc++ << 24;
/* Decrement loop counter */
blkCnt--;
}
}
#else
void arm_q7_to_q31(
const q7_t * pSrc,
q31_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt; /* Loop counter */
const q7_t *pIn = pSrc; /* Source pointer */
#if defined (ARM_MATH_LOOPUNROLL)
q31_t in;
/* Loop unrolling: Compute 4 outputs at a time */
blkCnt = blockSize >> 2U;
while (blkCnt > 0U)
{
/* C = (q31_t) A << 24 */
/* Convert from q7 to q31 and store result in destination buffer */
in = read_q7x4_ia (&pIn);
#ifndef ARM_MATH_BIG_ENDIAN
*pDst++ = (__ROR(in, 8)) & 0xFF000000;
*pDst++ = (__ROR(in, 16)) & 0xFF000000;
*pDst++ = (__ROR(in, 24)) & 0xFF000000;
*pDst++ = (in & 0xFF000000);
#else
*pDst++ = (in & 0xFF000000);
*pDst++ = (__ROR(in, 24)) & 0xFF000000;
*pDst++ = (__ROR(in, 16)) & 0xFF000000;
*pDst++ = (__ROR(in, 8)) & 0xFF000000;
#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
/* Decrement loop counter */
blkCnt--;
}
/* Loop unrolling: Compute remaining outputs */
blkCnt = blockSize % 0x4U;
#else
/* Initialize blkCnt with number of samples */
blkCnt = blockSize;
#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
while (blkCnt > 0U)
{
/* C = (q31_t) A << 24 */
/* Convert from q7 to q31 and store result in destination buffer */
*pDst++ = (q31_t) * pIn++ << 24;
/* Decrement loop counter */
blkCnt--;
}
}
#endif /* defined(ARM_MATH_MVEI) */
/**
@} end of q7_to_x group
*/
|
