1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_xor_u16.c
4 * Description: uint16_t bitwise exclusive OR
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.h"
30
31 /**
32 @ingroup groupMath
33 */
34
35 /**
36 @defgroup Xor Vector bitwise exclusive OR
37
38 Compute the logical bitwise XOR.
39
40 There are separate functions for uint32_t, uint16_t, and uint8_t data types.
41 */
42
43 /**
44 @addtogroup Xor
45 @{
46 */
47
48 /**
49 @brief Compute the logical bitwise XOR of two fixed-point vectors.
50 @param[in] pSrcA points to input vector A
51 @param[in] pSrcB points to input vector B
52 @param[out] pDst points to output vector
53 @param[in] blockSize number of samples in each vector
54 @return none
55 */
56
arm_xor_u16(const uint16_t * pSrcA,const uint16_t * pSrcB,uint16_t * pDst,uint32_t blockSize)57 void arm_xor_u16(
58 const uint16_t * pSrcA,
59 const uint16_t * pSrcB,
60 uint16_t * pDst,
61 uint32_t blockSize)
62 {
63 uint32_t blkCnt; /* Loop counter */
64
65 #if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
66 uint16x8_t vecSrcA, vecSrcB;
67
68 /* Compute 8 outputs at a time */
69 blkCnt = blockSize >> 3;
70
71 while (blkCnt > 0U)
72 {
73 vecSrcA = vld1q(pSrcA);
74 vecSrcB = vld1q(pSrcB);
75
76 vst1q(pDst, veorq_u16(vecSrcA, vecSrcB) );
77
78 pSrcA += 8;
79 pSrcB += 8;
80 pDst += 8;
81
82 /* Decrement the loop counter */
83 blkCnt--;
84 }
85
86 /* Tail */
87 blkCnt = blockSize & 7;
88
89 if (blkCnt > 0U)
90 {
91 mve_pred16_t p0 = vctp16q(blkCnt);
92 vecSrcA = vld1q(pSrcA);
93 vecSrcB = vld1q(pSrcB);
94 vstrhq_p(pDst, veorq_u16(vecSrcA, vecSrcB), p0);
95 }
96 #else
97 #if defined(ARM_MATH_NEON) && !defined(ARM_MATH_AUTOVECTORIZE)
98 uint16x8_t vecA, vecB;
99
100 /* Compute 8 outputs at a time */
101 blkCnt = blockSize >> 3U;
102
103 while (blkCnt > 0U)
104 {
105 vecA = vld1q_u16(pSrcA);
106 vecB = vld1q_u16(pSrcB);
107
108 vst1q_u16(pDst, veorq_u16(vecA, vecB) );
109
110 pSrcA += 8;
111 pSrcB += 8;
112 pDst += 8;
113
114 /* Decrement the loop counter */
115 blkCnt--;
116 }
117
118 /* Tail */
119 blkCnt = blockSize & 7;
120 #else
121 /* Initialize blkCnt with number of samples */
122 blkCnt = blockSize;
123 #endif
124
125 while (blkCnt > 0U)
126 {
127 *pDst++ = (*pSrcA++)^(*pSrcB++);
128
129 /* Decrement the loop counter */
130 blkCnt--;
131 }
132 #endif /* if defined(ARM_MATH_MVEI) */
133 }
134
135 /**
136 @} end of Xor group
137 */
138
