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2 | mjames | 1 | /* |
2 | * Copyright (C) 2010-2018 Arm Limited or its affiliates. All rights reserved. |
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3 | * |
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4 | * SPDX-License-Identifier: Apache-2.0 |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the License); you may |
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7 | * not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
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14 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | |||
19 | /* ---------------------------------------------------------------------- |
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20 | * Project: CMSIS NN Library |
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21 | * Title: arm_convolve_HWC_q15_fast.c |
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22 | * Description: Fast Q15 version of convolution |
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23 | * |
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24 | * $Date: 17. January 2018 |
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25 | * $Revision: V.1.0.0 |
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26 | * |
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27 | * Target Processor: Cortex-M cores |
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28 | * |
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29 | * -------------------------------------------------------------------- */ |
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30 | |||
31 | #include "arm_math.h" |
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32 | #include "arm_nnfunctions.h" |
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33 | |||
34 | /** |
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35 | * @ingroup groupNN |
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36 | */ |
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37 | |||
38 | /** |
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39 | * @addtogroup NNConv |
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40 | * @{ |
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41 | */ |
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42 | |||
43 | /** |
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44 | * @brief Fast Q15 convolution function |
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45 | * @param[in] Im_in pointer to input tensor |
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46 | * @param[in] dim_im_in input tensor dimention |
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47 | * @param[in] ch_im_in number of input tensor channels |
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48 | * @param[in] wt pointer to kernel weights |
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49 | * @param[in] ch_im_out number of filters, i.e., output tensor channels |
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50 | * @param[in] dim_kernel filter kernel size |
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51 | * @param[in] padding padding sizes |
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52 | * @param[in] stride convolution stride |
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53 | * @param[in] bias pointer to bias |
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54 | * @param[in] bias_shift amount of left-shift for bias |
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55 | * @param[in] out_shift amount of right-shift for output |
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56 | * @param[in,out] Im_out pointer to output tensor |
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57 | * @param[in] dim_im_out output tensor dimension |
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58 | * @param[in,out] bufferA pointer to buffer space for input |
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59 | * @param[in,out] bufferB pointer to buffer space for output |
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60 | * @return The function returns either |
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61 | * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking. |
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62 | * |
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63 | * @details |
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64 | * |
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65 | * <b>Buffer size:</b> |
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66 | * |
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67 | * bufferA size: 2*ch_im_in*dim_kernel*dim_kernel |
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68 | * |
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69 | * bufferB size: 0 |
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70 | * |
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71 | * <b>Input dimension constraints:</b> |
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72 | * |
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73 | * ch_im_in is multiple of 2 |
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74 | * |
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75 | * ch_im_out is multipe of 2 |
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76 | * |
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77 | */ |
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78 | |||
79 | arm_status |
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80 | arm_convolve_HWC_q15_fast(const q15_t * Im_in, |
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81 | const uint16_t dim_im_in, |
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82 | const uint16_t ch_im_in, |
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83 | const q15_t * wt, |
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84 | const uint16_t ch_im_out, |
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85 | const uint16_t dim_kernel, |
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86 | const uint16_t padding, |
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87 | const uint16_t stride, |
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88 | const q15_t * bias, |
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89 | const uint16_t bias_shift, |
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90 | const uint16_t out_shift, |
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91 | q15_t * Im_out, |
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92 | const uint16_t dim_im_out, |
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93 | q15_t * bufferA, |
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94 | q7_t * bufferB) |
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95 | { |
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96 | |||
97 | #if defined (ARM_MATH_DSP) |
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98 | int16_t i_out_y, i_out_x, i_ker_y, i_ker_x; |
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99 | |||
100 | q15_t *pBuffer = bufferA; |
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101 | q15_t *im_buffer = bufferA; |
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102 | q15_t *pOut = Im_out; |
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103 | |||
104 | if (ch_im_in % 2 != 0 || ch_im_out % 2 != 0) |
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105 | { |
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106 | /* check if the input dimension meets the constraints */ |
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107 | return ARM_MATH_SIZE_MISMATCH; |
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108 | } |
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109 | |||
110 | /* Run the following code for Cortex-M4 and Cortex-M7 */ |
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111 | |||
112 | /* This part implements the im2col function */ |
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113 | for (i_out_y = 0; i_out_y < dim_im_out; i_out_y++) |
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114 | { |
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115 | for (i_out_x = 0; i_out_x < dim_im_out; i_out_x++) |
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116 | { |
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117 | for (i_ker_y = i_out_y * stride - padding; i_ker_y < i_out_y * stride - padding + dim_kernel; i_ker_y++) |
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118 | { |
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119 | for (i_ker_x = i_out_x * stride - padding; i_ker_x < i_out_x * stride - padding + dim_kernel; i_ker_x++) |
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120 | { |
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121 | if (i_ker_y < 0 || i_ker_y >= dim_im_in || i_ker_x < 0 || i_ker_x >= dim_im_in) |
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122 | { |
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123 | /* arm_fill_q15(0, pBuffer, ch_im_in); */ |
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124 | memset(pBuffer, 0, sizeof(q15_t)*ch_im_in); |
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125 | } else |
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126 | { |
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127 | /* arm_copy_q15((q15_t *) Im_in + (i_ker_y * dim_im_in + i_ker_x) * ch_im_in, pBuffer, ch_im_in); */ |
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128 | memcpy(pBuffer, (q15_t *) Im_in + (i_ker_y * dim_im_in + i_ker_x) * ch_im_in, sizeof(q15_t)*ch_im_in); |
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129 | } |
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130 | pBuffer += ch_im_in; |
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131 | } |
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132 | } |
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133 | |||
134 | if (i_out_x & 0x1) |
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135 | { |
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136 | int i; |
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137 | /* initialize the matrix pointers for A */ |
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138 | const q15_t *pA = wt; |
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139 | |||
140 | /* set up the second output pointers */ |
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141 | q15_t *pOut2 = pOut + ch_im_out; |
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142 | |||
143 | /* this loop over rows in A */ |
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144 | for (i = 0; i < ch_im_out; i += 2) |
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145 | { |
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146 | /* setup pointers for B */ |
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147 | q15_t *pB = im_buffer; |
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148 | const q15_t *pB2 = pB + ch_im_in * dim_kernel * dim_kernel; |
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149 | |||
150 | /* aling the second pointer for A */ |
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151 | const q15_t *pA2 = pA + ch_im_in * dim_kernel * dim_kernel; |
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152 | |||
153 | /* init the sum with bias */ |
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154 | q31_t sum = ((q31_t)bias[i] << bias_shift) + NN_ROUND(out_shift); |
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155 | q31_t sum2 = ((q31_t)bias[i] << bias_shift) + NN_ROUND(out_shift); |
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156 | q31_t sum3 = ((q31_t)bias[i + 1] << bias_shift) + NN_ROUND(out_shift); |
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157 | q31_t sum4 = ((q31_t)bias[i + 1] << bias_shift) + NN_ROUND(out_shift); |
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158 | |||
159 | uint16_t colCnt = ch_im_in * dim_kernel * dim_kernel >> 1; |
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160 | /* accumulate over the vector */ |
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161 | while (colCnt) |
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162 | { |
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163 | q31_t inA1 = *__SIMD32(pA)++; |
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164 | q31_t inB1 = *__SIMD32(pB)++; |
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165 | q31_t inA2 = *__SIMD32(pA2)++; |
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166 | q31_t inB2 = *__SIMD32(pB2)++; |
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167 | |||
168 | sum = __SMLAD(inA1, inB1, sum); |
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169 | sum2 = __SMLAD(inA1, inB2, sum2); |
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170 | sum3 = __SMLAD(inA2, inB1, sum3); |
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171 | sum4 = __SMLAD(inA2, inB2, sum4); |
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172 | |||
173 | colCnt--; |
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174 | } /* while over colCnt */ |
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175 | colCnt = ch_im_in * dim_kernel * dim_kernel & 0x1; |
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176 | while (colCnt) |
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177 | { |
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178 | q15_t inA1 = *pA++; |
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179 | q15_t inB1 = *pB++; |
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180 | q15_t inA2 = *pA2++; |
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181 | q15_t inB2 = *pB2++; |
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182 | |||
183 | sum += inA1 * inB1; |
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184 | sum2 += inA1 * inB2; |
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185 | sum3 += inA2 * inB1; |
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186 | sum4 += inA2 * inB2; |
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187 | colCnt--; |
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188 | } /* while over colCnt */ |
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189 | *pOut++ = (q15_t) __SSAT(sum >> out_shift, 16); |
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190 | *pOut++ = (q15_t) __SSAT(sum3 >> out_shift, 16); |
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191 | *pOut2++ = (q15_t) __SSAT(sum2 >> out_shift, 16); |
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192 | *pOut2++ = (q15_t) __SSAT(sum4 >> out_shift, 16); |
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193 | |||
194 | /* skip the row computed with A2 */ |
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195 | pA += ch_im_in * dim_kernel * dim_kernel; |
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196 | } /* for over ch_im_out */ |
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197 | |||
198 | pOut += ch_im_out; |
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199 | /* counter reset */ |
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200 | pBuffer = im_buffer; |
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201 | } |
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202 | } |
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203 | } |
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204 | |||
205 | #else |
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206 | /* Run the following code as reference implementation for Cortex-M0 and Cortex-M3 */ |
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207 | uint16_t i, j, k, l, m, n; |
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208 | int conv_out; |
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209 | signed char in_row, in_col; |
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210 | |||
211 | if (ch_im_in % 2 != 0 || ch_im_out % 2 != 0) |
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212 | { |
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213 | /* check if the input dimension meets the constraints */ |
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214 | return ARM_MATH_SIZE_MISMATCH; |
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215 | } |
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216 | |||
217 | for (i = 0; i < ch_im_out; i++) |
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218 | { |
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219 | for (j = 0; j < dim_im_out; j++) |
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220 | { |
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221 | for (k = 0; k < dim_im_out; k++) |
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222 | { |
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223 | conv_out = ((q31_t)bias[i] << bias_shift) + NN_ROUND(out_shift); |
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224 | for (m = 0; m < dim_kernel; m++) |
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225 | { |
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226 | for (n = 0; n < dim_kernel; n++) |
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227 | { |
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228 | in_row = stride * j + m - padding; |
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229 | in_col = stride * k + n - padding; |
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230 | if (in_row >= 0 && in_col >= 0 && in_row < dim_im_in && in_col < dim_im_in) |
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231 | { |
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232 | for (l = 0; l < ch_im_in; l++) |
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233 | { |
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234 | conv_out += |
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235 | Im_in[(in_row * dim_im_in + in_col) * ch_im_in + |
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236 | l] * wt[i * ch_im_in * dim_kernel * dim_kernel + (m * dim_kernel + |
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237 | n) * ch_im_in + l]; |
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238 | } |
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239 | } |
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240 | } |
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241 | } |
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242 | Im_out[i + (j * dim_im_out + k) * ch_im_out] = (q15_t) __SSAT((conv_out >> out_shift), 16); |
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243 | } |
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244 | } |
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245 | } |
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246 | |||
247 | #endif /* ARM_MATH_DSP */ |
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248 | |||
249 | /* Return to application */ |
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250 | return ARM_MATH_SUCCESS; |
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251 | } |
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252 | |||
253 | /** |
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254 | * @} end of NNConv group |
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255 | */ |