1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_add_f16.c
4 * Description: Floating-point vector addition
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/basic_math_functions_f16.h"
30
31 /**
32 @ingroup groupMath
33 */
34
35 /**
36 @defgroup BasicAdd Vector Addition
37
38 Element-by-element addition of two vectors.
39
40 <pre>
41 pDst[n] = pSrcA[n] + pSrcB[n], 0 <= n < blockSize.
42 </pre>
43
44 There are separate functions for floating-point, Q7, Q15, and Q31 data types.
45 */
46
47 /**
48 @addtogroup BasicAdd
49 @{
50 */
51
52 /**
53 @brief Floating-point vector addition.
54 @param[in] pSrcA points to first input vector
55 @param[in] pSrcB points to second input vector
56 @param[out] pDst points to output vector
57 @param[in] blockSize number of samples in each vector
58 @return none
59 */
60
61 #if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE)
62
63 #include "arm_helium_utils.h"
64
arm_add_f16(const float16_t * pSrcA,const float16_t * pSrcB,float16_t * pDst,uint32_t blockSize)65 void arm_add_f16(
66 const float16_t * pSrcA,
67 const float16_t * pSrcB,
68 float16_t * pDst,
69 uint32_t blockSize)
70 {
71 uint32_t blkCnt; /* Loop counter */
72
73 f16x8_t vec1;
74 f16x8_t vec2;
75 f16x8_t res;
76
77 /* Compute 4 outputs at a time */
78 blkCnt = blockSize >> 3U;
79
80 while (blkCnt > 0U)
81 {
82 /* C = A + B */
83
84 /* Add and then store the results in the destination buffer. */
85 vec1 = vld1q(pSrcA);
86 vec2 = vld1q(pSrcB);
87 res = vaddq(vec1, vec2);
88 vst1q(pDst, res);
89
90 /* Increment pointers */
91 pSrcA += 8;
92 pSrcB += 8;
93 pDst += 8;
94
95 /* Decrement the loop counter */
96 blkCnt--;
97 }
98
99 /* Tail */
100 blkCnt = blockSize & 0x7;
101
102 if (blkCnt > 0U)
103 {
104 /* C = A + B */
105 mve_pred16_t p0 = vctp16q(blkCnt);
106 vec1 = vld1q(pSrcA);
107 vec2 = vld1q(pSrcB);
108 vstrhq_p(pDst, vaddq(vec1,vec2), p0);
109 }
110
111 }
112
113 #else
114 #if defined(ARM_FLOAT16_SUPPORTED)
arm_add_f16(const float16_t * pSrcA,const float16_t * pSrcB,float16_t * pDst,uint32_t blockSize)115 void arm_add_f16(
116 const float16_t * pSrcA,
117 const float16_t * pSrcB,
118 float16_t * pDst,
119 uint32_t blockSize)
120 {
121 uint32_t blkCnt; /* Loop counter */
122
123 #if defined (ARM_MATH_LOOPUNROLL) && !defined(ARM_MATH_AUTOVECTORIZE)
124
125 /* Loop unrolling: Compute 4 outputs at a time */
126 blkCnt = blockSize >> 2U;
127
128 while (blkCnt > 0U)
129 {
130 /* C = A + B */
131
132 /* Add and store result in destination buffer. */
133 *pDst++ = (*pSrcA++) + (*pSrcB++);
134 *pDst++ = (*pSrcA++) + (*pSrcB++);
135 *pDst++ = (*pSrcA++) + (*pSrcB++);
136 *pDst++ = (*pSrcA++) + (*pSrcB++);
137
138 /* Decrement loop counter */
139 blkCnt--;
140 }
141
142 /* Loop unrolling: Compute remaining outputs */
143 blkCnt = blockSize % 0x4U;
144
145 #else
146
147 /* Initialize blkCnt with number of samples */
148 blkCnt = blockSize;
149
150 #endif /* #if defined (ARM_MATH_LOOPUNROLL) */
151
152 while (blkCnt > 0U)
153 {
154 /* C = A + B */
155
156 /* Add and store result in destination buffer. */
157 *pDst++ = (*pSrcA++) + (*pSrcB++);
158
159 /* Decrement loop counter */
160 blkCnt--;
161 }
162
163 }
164 #endif /* defined(ARM_FLOAT16_SUPPORTED) */
165 #endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
166
167 /**
168 @} end of BasicAdd group
169 */
170
