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/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_xor_u8.c
* Description: uint8_t bitwise exclusive OR
*
* $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/basic_math_functions.h"
/**
@ingroup groupMath
*/
/**
@addtogroup Xor
@{
*/
/**
@brief Compute the logical bitwise XOR of two fixed-point vectors.
@param[in] pSrcA points to input vector A
@param[in] pSrcB points to input vector B
@param[out] pDst points to output vector
@param[in] blockSize number of samples in each vector
@return none
*/
void arm_xor_u8(
const uint8_t * pSrcA,
const uint8_t * pSrcB,
uint8_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt; /* Loop counter */
#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
uint8x16_t vecSrcA, vecSrcB;
/* Compute 16 outputs at a time */
blkCnt = blockSize >> 4;
while (blkCnt > 0U)
{
vecSrcA = vld1q(pSrcA);
vecSrcB = vld1q(pSrcB);
vst1q(pDst, veorq_u8(vecSrcA, vecSrcB) );
pSrcA += 16;
pSrcB += 16;
pDst += 16;
/* Decrement the loop counter */
blkCnt--;
}
/* Tail */
blkCnt = blockSize & 0xF;
if (blkCnt > 0U)
{
mve_pred16_t p0 = vctp8q(blkCnt);
vecSrcA = vld1q(pSrcA);
vecSrcB = vld1q(pSrcB);
vstrbq_p(pDst, veorq_u8(vecSrcA, vecSrcB), p0);
}
#else
#if defined(ARM_MATH_NEON) && !defined(ARM_MATH_AUTOVECTORIZE)
uint8x16_t vecA, vecB;
/* Compute 16 outputs at a time */
blkCnt = blockSize >> 4U;
while (blkCnt > 0U)
{
vecA = vld1q_u8(pSrcA);
vecB = vld1q_u8(pSrcB);
vst1q_u8(pDst, veorq_u8(vecA, vecB) );
pSrcA += 16;
pSrcB += 16;
pDst += 16;
/* Decrement the loop counter */
blkCnt--;
}
/* Tail */
blkCnt = blockSize & 0xF;
#else
/* Initialize blkCnt with number of samples */
blkCnt = blockSize;
#endif
while (blkCnt > 0U)
{
*pDst++ = (*pSrcA++)^(*pSrcB++);
/* Decrement the loop counter */
blkCnt--;
}
#endif /* if defined(ARM_MATH_MVEI) */
}
/**
@} end of Xor group
*/
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