File size: 3,998 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 | #include "edge-impulse-sdk/dsp/config.hpp"
#if EIDSP_LOAD_CMSIS_DSP_SOURCES
/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_clip_f32.c
* Description: Floating-point vector addition
*
* $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
*/
/**
@defgroup BasicClip Elementwise clipping
Element-by-element clipping of a value.
The value is constrained between 2 bounds.
There are separate functions for floating-point, Q7, Q15, and Q31 data types.
*/
/**
@addtogroup BasicClip
@{
*/
/**
@brief Elementwise floating-point clipping
@param[in] pSrc points to input values
@param[out] pDst points to output clipped values
@param[in] low lower bound
@param[in] high higher bound
@param[in] numSamples number of samples to clip
@return none
*/
#if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
#include "edge-impulse-sdk/CMSIS/DSP/Include/arm_helium_utils.h"
void arm_clip_f32(const float32_t * pSrc,
float32_t * pDst,
float32_t low,
float32_t high,
uint32_t numSamples)
{
uint32_t blkCnt;
f32x4_t curVec0, curVec1;
f32x4_t vecLow, vecHigh;
vecLow = vdupq_n_f32(low);
vecHigh = vdupq_n_f32(high);
curVec0 = vld1q(pSrc);
pSrc += 4;
/*
* unrolled x 2 to allow
* vldr/vstr/vmin/vmax
* stall free interleaving
*/
blkCnt = numSamples >> 3;
while (blkCnt--)
{
curVec0 = vmaxnmq(curVec0, vecLow);
curVec1 = vld1q(pSrc);
pSrc += 4;
curVec0 = vminnmq(curVec0, vecHigh);
vst1q(pDst, curVec0);
pDst += 4;
curVec1 = vmaxnmq(curVec1, vecLow);
curVec0 = vld1q(pSrc);
pSrc += 4;
curVec1 = vminnmq(curVec1, vecHigh);
vst1q(pDst, curVec1);
pDst += 4;
}
/*
* Tail handling
*/
blkCnt = numSamples - ((numSamples >> 3) << 3);
if (blkCnt >= 4)
{
curVec0 = vmaxnmq(curVec0, vecLow);
curVec0 = vminnmq(curVec0, vecHigh);
vst1q(pDst, curVec0);
pDst += 4;
curVec0 = vld1q(pSrc);
pSrc += 4;
}
if (blkCnt > 0)
{
mve_pred16_t p0 = vctp32q(blkCnt & 3);
curVec0 = vmaxnmq(curVec0, vecLow);
curVec0 = vminnmq(curVec0, vecHigh);
vstrwq_p(pDst, curVec0, p0);
}
}
#else
void arm_clip_f32(const float32_t * pSrc,
float32_t * pDst,
float32_t low,
float32_t high,
uint32_t numSamples)
{
uint32_t i;
for (i = 0; i < numSamples; i++)
{
if (pSrc[i] > high)
pDst[i] = high;
else if (pSrc[i] < low)
pDst[i] = low;
else
pDst[i] = pSrc[i];
}
}
#endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
/**
@} end of BasicClip group
*/
#endif // EIDSP_LOAD_CMSIS_DSP_SOURCES
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