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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | #include "edge-impulse-sdk/classifier/ei_classifier_config.h"
#if EI_CLASSIFIER_TFLITE_LOAD_CMSIS_NN_SOURCES
/*
* SPDX-FileCopyrightText: Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
*
* 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.
*/
/* ----------------------------------------------------------------------
* Project: CMSIS NN Library
* Title: arm_max_pool_s16.c
* Description: Pooling function implementations
*
* $Date: 16 August 2022
* $Revision: V.2.1.1
*
* Target Processor: Cortex-M CPUs
*
* -------------------------------------------------------------------- */
#include "edge-impulse-sdk/CMSIS/NN/Include/arm_nnfunctions.h"
#include "edge-impulse-sdk/CMSIS/NN/Include/arm_nnsupportfunctions.h"
static void compare_and_replace_if_larger(int16_t *base, const int16_t *target, int32_t length)
{
#if defined(ARM_MATH_MVEI)
int32_t loop_count = (length + 7) / 8;
for (int i = 0; i < loop_count; i++)
{
mve_pred16_t p = vctp16q((uint32_t)length);
const int16x8_t op_1 = vldrhq_z_s16(base, p);
const int16x8_t op_2 = vldrhq_z_s16(target, p);
const int16x8_t max = vmaxq_s16(op_1, op_2);
vstrhq_p_s16(base, max, p);
base += 8;
target += 8;
length -= 8;
}
#else
q15_t *dst = base;
const q15_t *src = target;
union arm_nnword ref_max;
union arm_nnword comp_max;
int32_t cnt = length >> 1;
while (cnt > 0l)
{
ref_max.word = arm_nn_read_q15x2(dst);
comp_max.word = arm_nn_read_q15x2_ia(&src);
if (comp_max.half_words[0] > ref_max.half_words[0])
{
ref_max.half_words[0] = comp_max.half_words[0];
}
if (comp_max.half_words[1] > ref_max.half_words[1])
{
ref_max.half_words[1] = comp_max.half_words[1];
}
arm_nn_write_q15x2_ia(&dst, ref_max.word);
cnt--;
}
if (length & 0x1)
{
if (*src > *dst)
{
*dst = *src;
}
}
#endif
}
static void clamp_output(int16_t *source, int32_t length, const int16_t act_min, const int16_t act_max)
{
#if defined(ARM_MATH_MVEI)
const int16x8_t min = vdupq_n_s16((int16_t)act_min);
const int16x8_t max = vdupq_n_s16((int16_t)act_max);
int32_t loop_count = (length + 7) / 8;
for (int i = 0; i < loop_count; i++)
{
mve_pred16_t p = vctp16q((uint32_t)length);
length -= 8;
const int16x8_t src = vldrhq_z_s16(source, p);
int16x8_t res = vmaxq_x_s16(src, min, p);
res = vminq_x_s16(res, max, p);
vstrhq_p_s16(source, res, p);
source += 8;
}
#else
union arm_nnword in;
int32_t cnt = length >> 1;
while (cnt > 0l)
{
in.word = arm_nn_read_q15x2(source);
in.half_words[0] = MAX(in.half_words[0], act_min);
in.half_words[0] = MIN(in.half_words[0], act_max);
in.half_words[1] = MAX(in.half_words[1], act_min);
in.half_words[1] = MIN(in.half_words[1], act_max);
arm_nn_write_q15x2_ia(&source, in.word);
cnt--;
}
if (length & 0x1)
{
int16_t comp = *source;
comp = MAX(comp, act_min);
comp = MIN(comp, act_max);
*source = comp;
}
#endif
}
/**
* @ingroup groupNN
*/
/**
* @addtogroup Pooling
* @{
*/
/*
* Optimized s16 max pooling function
*
* Refer to header file for details.
*
*/
arm_cmsis_nn_status arm_max_pool_s16(const cmsis_nn_context *ctx,
const cmsis_nn_pool_params *pool_params,
const cmsis_nn_dims *input_dims,
const int16_t *src,
const cmsis_nn_dims *filter_dims,
const cmsis_nn_dims *output_dims,
int16_t *dst)
{
const int32_t input_y = input_dims->h;
const int32_t input_x = input_dims->w;
const int32_t output_y = output_dims->h;
const int32_t output_x = output_dims->w;
const int32_t stride_y = pool_params->stride.h;
const int32_t stride_x = pool_params->stride.w;
const int32_t kernel_y = filter_dims->h;
const int32_t kernel_x = filter_dims->w;
const int32_t pad_y = pool_params->padding.h;
const int32_t pad_x = pool_params->padding.w;
const int16_t act_min = pool_params->activation.min;
const int16_t act_max = pool_params->activation.max;
const int32_t channel_in = input_dims->c;
(void)ctx;
int16_t *dst_base = dst;
for (int i_y = 0, base_idx_y = -pad_y; i_y < output_y; base_idx_y += stride_y, i_y++)
{
for (int i_x = 0, base_idx_x = -pad_x; i_x < output_x; base_idx_x += stride_x, i_x++)
{
/* Condition for kernel start dimension: (base_idx_<x,y> + kernel_<x,y>_start) >= 0 */
const int32_t ker_y_start = MAX(0, -base_idx_y);
const int32_t ker_x_start = MAX(0, -base_idx_x);
/* Condition for kernel end dimension: (base_idx_<x,y> + kernel_<x,y>_end) < dim_src_<width,height> */
const int32_t kernel_y_end = MIN(kernel_y, input_y - base_idx_y);
const int32_t kernel_x_end = MIN(kernel_x, input_x - base_idx_x);
int count = 0;
for (int k_y = ker_y_start; k_y < kernel_y_end; k_y++)
{
for (int k_x = ker_x_start; k_x < kernel_x_end; k_x++)
{
const int16_t *start = src + channel_in * (k_x + base_idx_x + (k_y + base_idx_y) * input_x);
if (count == 0)
{
memcpy(dst, start, channel_in * sizeof(int16_t));
count++;
}
else
{
compare_and_replace_if_larger(dst, start, channel_in);
}
}
}
/* 'count' is expected to be non-zero here. */
dst += channel_in;
}
}
clamp_output(dst_base, output_x * output_y * channel_in, act_min, act_max);
return ARM_CMSIS_NN_SUCCESS;
}
/**
* @} end of Pooling group
*/
#endif // EI_CLASSIFIER_TFLITE_LOAD_CMSIS_NN_SOURCES
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