File size: 4,624 Bytes
25ade36 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | #include "edge-impulse-sdk/dsp/config.hpp"
#if EIDSP_LOAD_CMSIS_DSP_SOURCES
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_offset_q15.c
* Description: Q15 vector offset
*
* $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 "edge-impulse-sdk/CMSIS/DSP/Include/dsp/basic_math_functions.h"
/**
@ingroup groupMath
*/
/**
@addtogroup BasicOffset
@{
*/
/**
@brief Adds a constant offset to a Q15 vector.
@param[in] pSrc points to the input vector
@param[in] offset is the offset to be added
@param[out] pDst points to the output vector
@param[in] blockSize number of samples in each vector
@return none
@par Scaling and Overflow Behavior
The function uses saturating arithmetic.
Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.
*/
#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
#include "edge-impulse-sdk/CMSIS/DSP/Include/arm_helium_utils.h"
void arm_offset_q15(
const q15_t * pSrc,
q15_t offset,
q15_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt; /* loop counters */
q15x8_t vecSrc;
/* Compute 8 outputs at a time */
blkCnt = blockSize >> 3;
while (blkCnt > 0U)
{
/*
* C = A + offset
* Add offset and then store the result in the destination buffer.
*/
vecSrc = vld1q(pSrc);
vst1q(pDst, vqaddq(vecSrc, offset));
/*
* Decrement the blockSize loop counter
*/
blkCnt--;
/*
* advance vector source and destination pointers
*/
pSrc += 8;
pDst += 8;
}
/*
* tail
*/
blkCnt = blockSize & 7;
if (blkCnt > 0U)
{
mve_pred16_t p0 = vctp16q(blkCnt);
vecSrc = vld1q(pSrc);
vstrhq_p(pDst, vqaddq(vecSrc, offset), p0);
}
}
#else
void arm_offset_q15(
const q15_t * pSrc,
q15_t offset,
q15_t * pDst,
uint32_t blockSize)
{
uint32_t blkCnt; /* Loop counter */
#if defined (ARM_MATH_LOOPUNROLL)
#if defined (ARM_MATH_DSP)
q31_t offset_packed; /* Offset packed to 32 bit */
/* Offset is packed to 32 bit in order to use SIMD32 for addition */
offset_packed = __PKHBT(offset, offset, 16);
#endif
/* Loop unrolling: Compute 4 outputs at a time */
blkCnt = blockSize >> 2U;
while (blkCnt > 0U)
{
/* C = A + offset */
#if defined (ARM_MATH_DSP)
/* Add offset and store result in destination buffer (2 samples at a time). */
write_q15x2_ia (&pDst, __QADD16(read_q15x2_ia (&pSrc), offset_packed));
write_q15x2_ia (&pDst, __QADD16(read_q15x2_ia (&pSrc), offset_packed));
#else
*pDst++ = (q15_t) __SSAT(((q31_t) *pSrc++ + offset), 16);
*pDst++ = (q15_t) __SSAT(((q31_t) *pSrc++ + offset), 16);
*pDst++ = (q15_t) __SSAT(((q31_t) *pSrc++ + offset), 16);
*pDst++ = (q15_t) __SSAT(((q31_t) *pSrc++ + offset), 16);
#endif
/* 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 = A + offset */
/* Add offset and store result in destination buffer. */
#if defined (ARM_MATH_DSP)
*pDst++ = (q15_t) __QADD16(*pSrc++, offset);
#else
*pDst++ = (q15_t) __SSAT(((q31_t) *pSrc++ + offset), 16);
#endif
/* Decrement loop counter */
blkCnt--;
}
}
#endif /* defined(ARM_MATH_MVEI) */
/**
@} end of BasicOffset group
*/
#endif // EIDSP_LOAD_CMSIS_DSP_SOURCES
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