| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | module athena__flatten_layer | ||
| 2 | !! Module containing implementation of a flattening layer | ||
| 3 | !! | ||
| 4 | !! This module implements a reshape layer that flattens multi-dimensional | ||
| 5 | !! inputs into 1D vectors. Commonly used between convolutional and dense layers. | ||
| 6 | !! | ||
| 7 | !! Mathematical operation: | ||
| 8 | !! Reshape: (d1, d2, ..., dn) -> (d1 * d2 * ... * dn) | ||
| 9 | !! | ||
| 10 | !! Example: (28, 28, 32) -> (25088) | ||
| 11 | !! | ||
| 12 | !! No parameters, pure reshape operation | ||
| 13 | !! Preserves all information, just changes tensor structure | ||
| 14 | use coreutils, only: real32, stop_program | ||
| 15 | use athena__base_layer, only: base_layer_type | ||
| 16 | use diffstruc, only: array_type, pack | ||
| 17 | use athena__misc_types, only: & | ||
| 18 | onnx_node_type, onnx_initialiser_type, onnx_tensor_type | ||
| 19 | implicit none | ||
| 20 | |||
| 21 | |||
| 22 | private | ||
| 23 | |||
| 24 | public :: flatten_layer_type | ||
| 25 | public :: read_flatten_layer, create_from_onnx_flatten_layer | ||
| 26 | |||
| 27 | |||
| 28 | type, extends(base_layer_type) :: flatten_layer_type | ||
| 29 | !! Type for 1D flattening layer with overloaded procedures | ||
| 30 | integer :: num_outputs | ||
| 31 | !! Number of outputs | ||
| 32 | contains | ||
| 33 | procedure, pass(this) :: set_rank => set_rank_flatten | ||
| 34 | !! Set input and output rank for flattening layer | ||
| 35 | procedure, pass(this) :: set_hyperparams => set_hyperparams_flatten | ||
| 36 | !! Set hyperparameters for flattening layer | ||
| 37 | procedure, pass(this) :: init => init_flatten | ||
| 38 | !! Initialise flattening layer | ||
| 39 | procedure, pass(this) :: print_to_unit => print_to_unit_flatten | ||
| 40 | !! Print flatten layer to unit | ||
| 41 | procedure, pass(this) :: read => read_flatten | ||
| 42 | !! Read flattening layer from file | ||
| 43 | procedure, pass(this) :: build_from_onnx => build_from_onnx_flatten | ||
| 44 | !! Build flattening layer from ONNX node and initialisers | ||
| 45 | |||
| 46 | procedure, pass(this) :: forward => forward_flatten | ||
| 47 | !! Forward propagation derived type handler | ||
| 48 | |||
| 49 | end type flatten_layer_type | ||
| 50 | |||
| 51 | interface flatten_layer_type | ||
| 52 | !! Interface for setting up the flattening layer | ||
| 53 | module function layer_setup( & | ||
| 54 | input_shape, input_rank, verbose & | ||
| 55 | ) result(layer) | ||
| 56 | !! Set up the flattening layer | ||
| 57 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 58 | !! Input shape | ||
| 59 | integer, optional, intent(in) :: input_rank | ||
| 60 | !! Input rank | ||
| 61 | integer, optional, intent(in) :: verbose | ||
| 62 | !! Verbosity level | ||
| 63 | type(flatten_layer_type) :: layer | ||
| 64 | !! Instance of the flattening layer | ||
| 65 | end function layer_setup | ||
| 66 | end interface flatten_layer_type | ||
| 67 | |||
| 68 | |||
| 69 | |||
| 70 | contains | ||
| 71 | |||
| 72 | !############################################################################### | ||
| 73 | 1 | subroutine set_rank_flatten(this, input_rank, output_rank) | |
| 74 | !! Set the input and output ranks of the layer | ||
| 75 | implicit none | ||
| 76 | |||
| 77 | ! Arguments | ||
| 78 | class(flatten_layer_type), intent(inout) :: this | ||
| 79 | !! Instance of the layer | ||
| 80 | integer, intent(in) :: input_rank | ||
| 81 | !! Input rank | ||
| 82 | integer, intent(in) :: output_rank | ||
| 83 | !! Output rank | ||
| 84 | |||
| 85 | !--------------------------------------------------------------------------- | ||
| 86 | ! Set input and output ranks | ||
| 87 | !--------------------------------------------------------------------------- | ||
| 88 | 1 | this%input_rank = input_rank | |
| 89 | 1 | this%output_rank = output_rank | |
| 90 | |||
| 91 | 1 | end subroutine set_rank_flatten | |
| 92 | !############################################################################### | ||
| 93 | |||
| 94 | |||
| 95 | !############################################################################### | ||
| 96 | 9 | module function layer_setup( & | |
| 97 |
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9 | input_shape, input_rank, verbose & |
| 98 | 9 | ) result(layer) | |
| 99 | !! Set up the flattening layer | ||
| 100 | implicit none | ||
| 101 | |||
| 102 | ! Arguments | ||
| 103 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 104 | !! Input shape | ||
| 105 | integer, optional, intent(in) :: input_rank | ||
| 106 | !! Input rank | ||
| 107 | integer, optional, intent(in) :: verbose | ||
| 108 | !! Verbosity level | ||
| 109 | |||
| 110 | type(flatten_layer_type) :: layer | ||
| 111 | !! Instance of the flattening layer | ||
| 112 | |||
| 113 | ! Local variables | ||
| 114 | integer :: input_rank_ = 0 | ||
| 115 | !! Input rank | ||
| 116 | integer :: verbose_ = 0 | ||
| 117 | !! Verbosity level | ||
| 118 | |||
| 119 |
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9 | if(present(verbose)) verbose_ = verbose |
| 120 | |||
| 121 | |||
| 122 | !--------------------------------------------------------------------------- | ||
| 123 | ! Set hyperparameters | ||
| 124 | !--------------------------------------------------------------------------- | ||
| 125 |
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9 | if(present(input_rank))then |
| 126 | 7 | input_rank_ = input_rank | |
| 127 |
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2 | elseif(present(input_shape))then |
| 128 |
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2 | input_rank_ = size(input_shape) |
| 129 | else | ||
| 130 | call stop_program( & | ||
| 131 | "input_rank or input_shape must be provided to flatten layer" & | ||
| 132 | ✗ | ) | |
| 133 | ✗ | return | |
| 134 | end if | ||
| 135 | 9 | call layer%set_hyperparams(input_rank_, verbose_) | |
| 136 | |||
| 137 | |||
| 138 | !--------------------------------------------------------------------------- | ||
| 139 | ! Initialise layer shape | ||
| 140 | !--------------------------------------------------------------------------- | ||
| 141 |
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9 | if(present(input_shape)) call layer%init(input_shape=input_shape) |
| 142 | |||
| 143 |
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18 | end function layer_setup |
| 144 | !############################################################################### | ||
| 145 | |||
| 146 | |||
| 147 | !############################################################################### | ||
| 148 | 11 | subroutine set_hyperparams_flatten(this, input_rank, verbose) | |
| 149 | !! Set hyperparameters for flattening layer | ||
| 150 | implicit none | ||
| 151 | |||
| 152 | ! Arguments | ||
| 153 | class(flatten_layer_type), intent(inout) :: this | ||
| 154 | !! Instance of the flattening layer | ||
| 155 | integer, intent(in) :: input_rank | ||
| 156 | !! Input rank | ||
| 157 | integer, optional, intent(in) :: verbose | ||
| 158 | !! Verbosity level | ||
| 159 | |||
| 160 |
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11 | this%name = "flatten" |
| 161 | 11 | this%type = "flat" | |
| 162 | 11 | this%input_rank = input_rank | |
| 163 | 11 | this%output_rank = 1 | |
| 164 | 11 | end subroutine set_hyperparams_flatten | |
| 165 | !############################################################################### | ||
| 166 | |||
| 167 | |||
| 168 | !############################################################################### | ||
| 169 |
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7 | subroutine init_flatten(this, input_shape, verbose) |
| 170 | !! Initialise flattening layer | ||
| 171 | implicit none | ||
| 172 | |||
| 173 | ! Arguments | ||
| 174 | class(flatten_layer_type), intent(inout) :: this | ||
| 175 | !! Instance of the flattening layer | ||
| 176 | integer, dimension(:), intent(in) :: input_shape | ||
| 177 | !! Input shape | ||
| 178 | integer, optional, intent(in) :: verbose | ||
| 179 | !! Verbosity level | ||
| 180 | |||
| 181 | ! Local variables | ||
| 182 | integer :: verbose_ = 0 | ||
| 183 | !! Verbosity level | ||
| 184 | |||
| 185 | |||
| 186 | !--------------------------------------------------------------------------- | ||
| 187 | ! Initialise optional arguments | ||
| 188 | !--------------------------------------------------------------------------- | ||
| 189 |
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7 | if(present(verbose)) verbose_ = verbose |
| 190 | |||
| 191 | |||
| 192 | !--------------------------------------------------------------------------- | ||
| 193 | ! Initialise input shape | ||
| 194 | !--------------------------------------------------------------------------- | ||
| 195 |
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7 | this%input_rank = size(input_shape) |
| 196 |
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7 | if(.not.allocated(this%input_shape)) call this%set_shape(input_shape) |
| 197 | |||
| 198 | |||
| 199 | !--------------------------------------------------------------------------- | ||
| 200 | ! Initialise output shape | ||
| 201 | !--------------------------------------------------------------------------- | ||
| 202 |
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29 | this%num_outputs = product(this%input_shape) |
| 203 |
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7 | if(allocated(this%output))then |
| 204 | ✗ | if(this%output(1,1)%allocated) call this%output(1,1)%deallocate() | |
| 205 | end if | ||
| 206 |
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21 | allocate(this%output(1,1)) |
| 207 |
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14 | this%output_shape = [this%num_outputs] |
| 208 | |||
| 209 | |||
| 210 | !--------------------------------------------------------------------------- | ||
| 211 | ! Allocate arrays | ||
| 212 | !--------------------------------------------------------------------------- | ||
| 213 |
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7 | if(this%use_graph_input)then |
| 214 | call stop_program( & | ||
| 215 | "Graph input not supported for flatten layer" & | ||
| 216 | ✗ | ) | |
| 217 | ✗ | return | |
| 218 | else | ||
| 219 |
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7 | if(allocated(this%output)) deallocate(this%output) |
| 220 |
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21 | allocate( this%output(1,1) ) |
| 221 | end if | ||
| 222 | |||
| 223 | end subroutine init_flatten | ||
| 224 | !############################################################################### | ||
| 225 | |||
| 226 | |||
| 227 | !##############################################################################! | ||
| 228 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 229 | !##############################################################################! | ||
| 230 | |||
| 231 | |||
| 232 | !############################################################################### | ||
| 233 | 1 | subroutine print_to_unit_flatten(this, unit) | |
| 234 | !! Print flatten layer to unit | ||
| 235 | implicit none | ||
| 236 | |||
| 237 | ! Arguments | ||
| 238 | class(flatten_layer_type), intent(in) :: this | ||
| 239 | !! Instance of the flatten layer | ||
| 240 | integer, intent(in) :: unit | ||
| 241 | !! File unit | ||
| 242 | |||
| 243 | ! Local variables | ||
| 244 | character(100) :: fmt | ||
| 245 | !! Format string | ||
| 246 | |||
| 247 | |||
| 248 | ! Write initial parameters | ||
| 249 | !--------------------------------------------------------------------------- | ||
| 250 | 1 | write(unit,'(3X,"INPUT_RANK = ",I0)') this%input_rank | |
| 251 | 1 | write(fmt,'("(3X,""INPUT_SHAPE ="",",I0,"(1X,I0))")') size(this%input_shape) | |
| 252 | 1 | write(unit,fmt) this%input_shape | |
| 253 | |||
| 254 | 1 | end subroutine print_to_unit_flatten | |
| 255 | !############################################################################### | ||
| 256 | |||
| 257 | |||
| 258 | !############################################################################### | ||
| 259 | 2 | subroutine read_flatten(this, unit, verbose) | |
| 260 | !! Read flattening layer from file | ||
| 261 | use athena__tools_infile, only: assign_val, assign_vec, get_val | ||
| 262 | use coreutils, only: to_lower, to_upper, icount | ||
| 263 | implicit none | ||
| 264 | |||
| 265 | ! Arguments | ||
| 266 | class(flatten_layer_type), intent(inout) :: this | ||
| 267 | !! Instance of the flattening layer | ||
| 268 | integer, intent(in) :: unit | ||
| 269 | !! File unit | ||
| 270 | integer, optional, intent(in) :: verbose | ||
| 271 | !! Verbosity level | ||
| 272 | |||
| 273 | ! Local variables | ||
| 274 | integer :: stat, verbose_ = 0 | ||
| 275 | !! File status and verbosity level | ||
| 276 | integer :: itmp1 = 0 | ||
| 277 | !! Temporary integer | ||
| 278 | integer :: input_rank = 0 | ||
| 279 | !! Input rank | ||
| 280 | 2 | integer, dimension(:), allocatable :: input_shape | |
| 281 | !! Input shape | ||
| 282 | character(256) :: buffer, tag, err_msg | ||
| 283 | !! Buffer, tag, and error message | ||
| 284 | |||
| 285 | |||
| 286 | ! Initialise optional arguments | ||
| 287 | !--------------------------------------------------------------------------- | ||
| 288 |
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2 | if(present(verbose)) verbose_ = verbose |
| 289 | |||
| 290 | |||
| 291 | ! Loop over tags in layer card | ||
| 292 | !--------------------------------------------------------------------------- | ||
| 293 | 3 | tag_loop: do | |
| 294 | |||
| 295 | ! Check for end of file | ||
| 296 | !------------------------------------------------------------------------ | ||
| 297 | 5 | read(unit,'(A)',iostat=stat) buffer | |
| 298 |
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5 | if(stat.ne.0)then |
| 299 | write(err_msg,'("file encountered error (EoF?) before END ",A)') & | ||
| 300 | ✗ | to_upper(this%name) | |
| 301 | ✗ | call stop_program(err_msg) | |
| 302 | ✗ | return | |
| 303 | end if | ||
| 304 |
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5 | if(trim(adjustl(buffer)).eq."") cycle tag_loop |
| 305 | |||
| 306 | ! Check for end of layer card | ||
| 307 | !------------------------------------------------------------------------ | ||
| 308 |
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10 | if(trim(adjustl(buffer)).eq."END "//to_upper(trim(this%name)))then |
| 309 | 2 | backspace(unit) | |
| 310 | 5 | exit tag_loop | |
| 311 | end if | ||
| 312 | |||
| 313 |
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3 | tag=trim(adjustl(buffer)) |
| 314 |
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3 | if(scan(buffer,"=").ne.0) tag=trim(tag(:scan(tag,"=")-1)) |
| 315 | |||
| 316 | ! Read parameters from save file | ||
| 317 | !------------------------------------------------------------------------ | ||
| 318 | 6 | select case(trim(tag)) | |
| 319 | case("INPUT_SHAPE") | ||
| 320 | 1 | itmp1 = icount(get_val(buffer)) | |
| 321 |
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1 | allocate(input_shape(itmp1), source=0) |
| 322 | 1 | call assign_vec(buffer, input_shape, itmp1) | |
| 323 | case("INPUT_RANK") | ||
| 324 | 2 | call assign_val(buffer, input_rank, itmp1) | |
| 325 | case default | ||
| 326 | ! Don't look for "e" due to scientific notation of numbers | ||
| 327 | ! ... i.e. exponent (E+00) | ||
| 328 | ✗ | if( & | |
| 329 | scan( & | ||
| 330 | to_lower(trim(adjustl(buffer))), & | ||
| 331 | 'abcdfghijklmnopqrstuvwxyz' & | ||
| 332 | ) .eq. 0 & | ||
| 333 | )then | ||
| 334 | ✗ | cycle tag_loop | |
| 335 | ✗ | elseif(tag(:3).eq.'END')then | |
| 336 | ✗ | cycle tag_loop | |
| 337 | end if | ||
| 338 | write(err_msg,'("Unrecognised line in input file: ",A)') & | ||
| 339 | ✗ | trim(adjustl(buffer)) | |
| 340 | ✗ | call stop_program(err_msg) | |
| 341 |
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6 | return |
| 342 | end select | ||
| 343 | end do tag_loop | ||
| 344 | |||
| 345 |
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2 | if(allocated(input_shape))then |
| 346 |
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1 | if(input_rank.eq.0)then |
| 347 | ✗ | input_rank = size(input_shape) | |
| 348 |
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1 | elseif(input_rank.ne.size(input_shape))then |
| 349 | write(err_msg,'("input_rank (",I0,") does not match input_shape (",I0,")")') & | ||
| 350 | ✗ | input_rank, size(input_shape) | |
| 351 | ✗ | call stop_program(err_msg) | |
| 352 | ✗ | return | |
| 353 | end if | ||
| 354 |
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1 | elseif(input_rank.eq.0)then |
| 355 | ✗ | write(err_msg,'("input_rank must be provided if input_shape is not")') | |
| 356 | ✗ | call stop_program(err_msg) | |
| 357 | ✗ | return | |
| 358 | end if | ||
| 359 | |||
| 360 | |||
| 361 | ! Set hyperparameters and initialise layer | ||
| 362 | !--------------------------------------------------------------------------- | ||
| 363 | 2 | call this%set_hyperparams(input_rank = input_rank, verbose = verbose_) | |
| 364 |
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2 | if(allocated(input_shape)) call this%init(input_shape = input_shape) |
| 365 | |||
| 366 | |||
| 367 | ! Check for end of layer card | ||
| 368 | !--------------------------------------------------------------------------- | ||
| 369 | 2 | read(unit,'(A)') buffer | |
| 370 |
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4 | if(trim(adjustl(buffer)).ne."END "//to_upper(trim(this%name)))then |
| 371 | ✗ | write(0,*) trim(adjustl(buffer)) | |
| 372 | ✗ | write(err_msg,'("END ",A," not where expected")') to_upper(this%name) | |
| 373 | ✗ | call stop_program(err_msg) | |
| 374 | 2 | return | |
| 375 | end if | ||
| 376 | |||
| 377 |
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2 | end subroutine read_flatten |
| 378 | !############################################################################### | ||
| 379 | |||
| 380 | |||
| 381 | !############################################################################### | ||
| 382 | 2 | function read_flatten_layer(unit, verbose) result(layer) | |
| 383 | !! Read flattening layer from file and return layer | ||
| 384 | implicit none | ||
| 385 | |||
| 386 | ! Arguments | ||
| 387 | integer, intent(in) :: unit | ||
| 388 | !! File unit | ||
| 389 | integer, optional, intent(in) :: verbose | ||
| 390 | !! Verbosity level | ||
| 391 | class(base_layer_type), allocatable :: layer | ||
| 392 | !! Instance of the flattening layer | ||
| 393 | |||
| 394 | ! Local variables | ||
| 395 | integer :: verbose_ = 0 | ||
| 396 | !! Verbosity level | ||
| 397 | |||
| 398 |
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2 | if(present(verbose)) verbose_ = verbose |
| 399 |
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4 | allocate(layer, source=flatten_layer_type(input_rank=1)) |
| 400 | 2 | call layer%read(unit, verbose=verbose_) | |
| 401 | |||
| 402 | 4 | end function read_flatten_layer | |
| 403 | !############################################################################### | ||
| 404 | |||
| 405 | |||
| 406 | !############################################################################### | ||
| 407 | 2 | subroutine build_from_onnx_flatten(this, node, initialisers, value_info, verbose ) | |
| 408 | !! Read ONNX attributes for flattening layer | ||
| 409 | implicit none | ||
| 410 | |||
| 411 | ! Arguments | ||
| 412 | class(flatten_layer_type), intent(inout) :: this | ||
| 413 | !! Instance of the flattening layer | ||
| 414 | type(onnx_node_type), intent(in) :: node | ||
| 415 | !! ONNX node information | ||
| 416 | type(onnx_initialiser_type), dimension(:), intent(in) :: initialisers | ||
| 417 | !! ONNX initialiser information | ||
| 418 | type(onnx_tensor_type), dimension(:), intent(in) :: value_info | ||
| 419 | !! ONNX value info | ||
| 420 | integer, intent(in) :: verbose | ||
| 421 | !! Verbosity level | ||
| 422 | |||
| 423 | ! Local variables | ||
| 424 | integer :: verbose_ = 0 | ||
| 425 | !! Verbosity level | ||
| 426 | |||
| 427 | 2 | end subroutine build_from_onnx_flatten | |
| 428 | !############################################################################### | ||
| 429 | |||
| 430 | |||
| 431 | !############################################################################### | ||
| 432 | 2 | function create_from_onnx_flatten_layer( & | |
| 433 |
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2 | node, initialisers, value_info, verbose & |
| 434 | 2 | ) result(layer) | |
| 435 | !! Build flattening layer from attributes and return layer | ||
| 436 | implicit none | ||
| 437 | |||
| 438 | ! Arguments | ||
| 439 | type(onnx_node_type), intent(in) :: node | ||
| 440 | !! ONNX node information | ||
| 441 | type(onnx_initialiser_type), dimension(:), intent(in) :: initialisers | ||
| 442 | !! ONNX initialiser information | ||
| 443 | type(onnx_tensor_type), dimension(:), intent(in) :: value_info | ||
| 444 | !! ONNX value info | ||
| 445 | integer, optional, intent(in) :: verbose | ||
| 446 | !! Verbosity level | ||
| 447 | class(base_layer_type), allocatable :: layer | ||
| 448 | !! Instance of the flattening layer | ||
| 449 | |||
| 450 | ! Local variables | ||
| 451 | integer :: verbose_ = 0 | ||
| 452 | !! Verbosity level | ||
| 453 | |||
| 454 |
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2 | if(present(verbose)) verbose_ = verbose |
| 455 |
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4 | allocate(layer, source=flatten_layer_type(input_rank=0)) |
| 456 |
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2 | call layer%build_from_onnx(node, initialisers, value_info, verbose=verbose_) |
| 457 | |||
| 458 | 4 | end function create_from_onnx_flatten_layer | |
| 459 | !############################################################################### | ||
| 460 | |||
| 461 | |||
| 462 | !##############################################################################! | ||
| 463 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 464 | !##############################################################################! | ||
| 465 | |||
| 466 | |||
| 467 | !############################################################################### | ||
| 468 |
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3 | subroutine forward_flatten(this, input) |
| 469 | !! Forward propagation | ||
| 470 | implicit none | ||
| 471 | |||
| 472 | ! Arguments | ||
| 473 | class(flatten_layer_type), intent(inout) :: this | ||
| 474 | !! Instance of the fully connected layer | ||
| 475 | class(array_type), dimension(:,:), intent(in) :: input | ||
| 476 | !! Input values | ||
| 477 | |||
| 478 | type(array_type), pointer :: ptr => null() | ||
| 479 | |||
| 480 | |||
| 481 | ! Flatten input | ||
| 482 | !--------------------------------------------------------------------------- | ||
| 483 |
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3 | call this%output(1,1)%zero_grad() |
| 484 |
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3 | ptr => pack(input(1,1), dim = 1) |
| 485 |
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3 | call this%output(1,1)%assign_and_deallocate_source(ptr) |
| 486 |
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3 | this%output(1,1)%is_temporary = .false. |
| 487 |
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3 | this%output(1,1)%fix_pointer = .true. |
| 488 | |||
| 489 | 3 | end subroutine forward_flatten | |
| 490 | !############################################################################### | ||
| 491 | |||
| 492 |
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98 | end module athena__flatten_layer |
| 493 |