| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | module athena__pad2d_layer | ||
| 2 | !! Module containing implementation of a 2D padding layer | ||
| 3 | !! | ||
| 4 | !! This module implements padding for 2D spatial data (images), adding values | ||
| 5 | !! around borders to control output dimensions or prepare for convolution. | ||
| 6 | !! | ||
| 7 | !! Operation: Extends spatial dimensions at boundaries | ||
| 8 | !! Adds p_top, p_bottom rows and p_left, p_right columns | ||
| 9 | !! | ||
| 10 | !! Padding modes: | ||
| 11 | !! - 'constant': pad with fixed value (typically 0) | ||
| 12 | !! - 'replicate': repeat edge values | ||
| 13 | !! - 'reflect': mirror values at boundaries | ||
| 14 | !! | ||
| 15 | !! Common use: Preserve spatial dimensions through convolution, | ||
| 16 | !! handle boundary effects in CNNs | ||
| 17 | !! Shape: (W,H,C) -> (W+p_l+p_r, H+p_t+p_b, C) | ||
| 18 | use coreutils, only: real32, stop_program | ||
| 19 | use athena__base_layer, only: pad_layer_type, base_layer_type | ||
| 20 | use diffstruc, only: array_type | ||
| 21 | use athena__diffstruc_extd, only: pad2d | ||
| 22 | use athena__misc_types, only: & | ||
| 23 | onnx_node_type, onnx_initialiser_type, onnx_tensor_type | ||
| 24 | implicit none | ||
| 25 | |||
| 26 | |||
| 27 | private | ||
| 28 | |||
| 29 | public :: pad2d_layer_type | ||
| 30 | public :: read_pad2d_layer | ||
| 31 | |||
| 32 | |||
| 33 | type, extends(pad_layer_type) :: pad2d_layer_type | ||
| 34 | !! Type for 2D padding layer with overloaded procedures | ||
| 35 | contains | ||
| 36 | procedure, pass(this) :: set_hyperparams => set_hyperparams_pad2d | ||
| 37 | !! Set hyperparameters for 2D padding layer | ||
| 38 | procedure, pass(this) :: read => read_pad2d | ||
| 39 | !! Read 2D padding layer from file | ||
| 40 | |||
| 41 | procedure, pass(this) :: forward => forward_pad2d | ||
| 42 | !! Forward propagation derived type handler | ||
| 43 | |||
| 44 | end type pad2d_layer_type | ||
| 45 | |||
| 46 | interface pad2d_layer_type | ||
| 47 | !! Interface for setting up the 2D padding layer | ||
| 48 | module function layer_setup( & | ||
| 49 | padding, method, & | ||
| 50 | input_shape, & | ||
| 51 | verbose & | ||
| 52 | ) result(layer) | ||
| 53 | !! Set up the 2D padding layer | ||
| 54 | integer, dimension(:), intent(in) :: padding | ||
| 55 | !! Padding sizes | ||
| 56 | character(*), intent(in) :: method | ||
| 57 | !! Padding method | ||
| 58 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 59 | !! Input shape | ||
| 60 | integer, optional, intent(in) :: verbose | ||
| 61 | !! Verbosity level | ||
| 62 | type(pad2d_layer_type) :: layer | ||
| 63 | !! Instance of the 2D padding layer | ||
| 64 | end function layer_setup | ||
| 65 | end interface pad2d_layer_type | ||
| 66 | |||
| 67 | |||
| 68 | |||
| 69 | contains | ||
| 70 | |||
| 71 | !############################################################################### | ||
| 72 | − | module function layer_setup( & | |
| 73 | − | padding, method, & | |
| 74 | − | input_shape, & | |
| 75 | − | verbose) result(layer) | |
| 76 | !! Set up the 2D padding layer | ||
| 77 | implicit none | ||
| 78 | |||
| 79 | ! Arguments | ||
| 80 | integer, dimension(:), intent(in) :: padding | ||
| 81 | !! Padding sizes | ||
| 82 | character(*), intent(in) :: method | ||
| 83 | !! Padding method | ||
| 84 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 85 | !! Input shape | ||
| 86 | integer, optional, intent(in) :: verbose | ||
| 87 | !! Verbosity level | ||
| 88 | |||
| 89 | type(pad2d_layer_type) :: layer | ||
| 90 | !! Instance of the 2D padding layer | ||
| 91 | |||
| 92 | ! Local variables | ||
| 93 | integer :: verbose_ = 0 | ||
| 94 | !! Verbosity level | ||
| 95 | integer, dimension(2) :: padding_2d | ||
| 96 | !! 2D padding sizes | ||
| 97 | |||
| 98 | − | if(present(verbose)) verbose_ = verbose | |
| 99 | |||
| 100 | !--------------------------------------------------------------------------- | ||
| 101 | ! Initialise padding sizes | ||
| 102 | !--------------------------------------------------------------------------- | ||
| 103 | − | select case(size(padding)) | |
| 104 | case(1) | ||
| 105 | − | padding_2d = [padding(1), padding(1)] | |
| 106 | case(2) | ||
| 107 | − | padding_2d = padding | |
| 108 | case default | ||
| 109 | − | call stop_program("Invalid padding size") | |
| 110 | end select | ||
| 111 | |||
| 112 | |||
| 113 | !--------------------------------------------------------------------------- | ||
| 114 | ! Set hyperparameters | ||
| 115 | !--------------------------------------------------------------------------- | ||
| 116 | − | call layer%set_hyperparams(padding=padding_2d, method=method, verbose=verbose_) | |
| 117 | |||
| 118 | |||
| 119 | !--------------------------------------------------------------------------- | ||
| 120 | ! Initialise layer shape | ||
| 121 | !--------------------------------------------------------------------------- | ||
| 122 | − | if(present(input_shape)) call layer%init(input_shape=input_shape) | |
| 123 | |||
| 124 | − | end function layer_setup | |
| 125 | !############################################################################### | ||
| 126 | |||
| 127 | |||
| 128 | !############################################################################### | ||
| 129 | − | subroutine set_hyperparams_pad2d(this, padding, method, verbose) | |
| 130 | !! Set hyperparameters for 2D padding layer | ||
| 131 | use coreutils, only: to_lower | ||
| 132 | implicit none | ||
| 133 | |||
| 134 | ! Arguments | ||
| 135 | class(pad2d_layer_type), intent(inout) :: this | ||
| 136 | !! Instance of the 2D padding layer | ||
| 137 | integer, dimension(2), intent(in) :: padding | ||
| 138 | !! Padding sizes | ||
| 139 | character(*), intent(in) :: method | ||
| 140 | !! Padding method | ||
| 141 | integer, optional, intent(in) :: verbose | ||
| 142 | !! Verbosity level | ||
| 143 | |||
| 144 | − | this%name = "pad2d" | |
| 145 | − | this%type = "pad" | |
| 146 | − | this%input_rank = 3 | |
| 147 | − | this%output_rank = 3 | |
| 148 | − | this%pad = padding | |
| 149 | − | if(allocated(this%facets)) deallocate(this%facets) | |
| 150 | − | allocate(this%facets(this%input_rank - 1)) | |
| 151 | − | this%facets(1)%rank = 2 | |
| 152 | − | this%facets(1)%nfixed_dims = 1 | |
| 153 | − | this%facets(2)%rank = 2 | |
| 154 | − | this%facets(2)%nfixed_dims = 2 | |
| 155 | − | select case(trim(adjustl(to_lower(method)))) | |
| 156 | case("valid", "none") | ||
| 157 | − | this%imethod = 0 | |
| 158 | case("same", "zero", "constant", "const") | ||
| 159 | − | this%imethod = 1 | |
| 160 | case("full") | ||
| 161 | − | this%imethod = 2 | |
| 162 | case("circular", "circ") | ||
| 163 | − | this%imethod = 3 | |
| 164 | case("reflection", "reflect", "refl") | ||
| 165 | − | this%imethod = 4 | |
| 166 | case("replication", "replicate", "copy", "repl") | ||
| 167 | − | this%imethod = 5 | |
| 168 | case default | ||
| 169 | − | call stop_program("Unrecognised padding method :"//method) | |
| 170 | − | return | |
| 171 | end select | ||
| 172 | − | this%method = trim(adjustl(to_lower(method))) | |
| 173 | |||
| 174 | − | end subroutine set_hyperparams_pad2d | |
| 175 | !############################################################################### | ||
| 176 | |||
| 177 | |||
| 178 | !##############################################################################! | ||
| 179 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 180 | !##############################################################################! | ||
| 181 | |||
| 182 | |||
| 183 | !############################################################################### | ||
| 184 | − | subroutine read_pad2d(this, unit, verbose) | |
| 185 | !! Read 2D padding layer from file | ||
| 186 | use athena__tools_infile, only: assign_val, assign_vec | ||
| 187 | use coreutils, only: to_lower, to_upper, icount | ||
| 188 | implicit none | ||
| 189 | |||
| 190 | ! Arguments | ||
| 191 | class(pad2d_layer_type), intent(inout) :: this | ||
| 192 | !! Instance of the 2D padding layer | ||
| 193 | integer, intent(in) :: unit | ||
| 194 | !! File unit | ||
| 195 | integer, optional, intent(in) :: verbose | ||
| 196 | !! Verbosity level | ||
| 197 | |||
| 198 | ! Local variables | ||
| 199 | integer :: verbose_ = 0 | ||
| 200 | !! Verbosity level | ||
| 201 | integer :: stat | ||
| 202 | !! File status | ||
| 203 | integer :: itmp1 | ||
| 204 | !! Temporary integer | ||
| 205 | integer, dimension(2) :: padding | ||
| 206 | !! Padding sizes | ||
| 207 | integer, dimension(3) :: input_shape | ||
| 208 | !! Input shape | ||
| 209 | character(20) :: method | ||
| 210 | !! Padding method | ||
| 211 | character(256) :: buffer, tag, err_msg | ||
| 212 | !! Buffer for reading lines, tag for identifying lines, error message | ||
| 213 | |||
| 214 | |||
| 215 | ! Initialise optional arguments | ||
| 216 | !--------------------------------------------------------------------------- | ||
| 217 | − | if(present(verbose)) verbose_ = verbose | |
| 218 | |||
| 219 | |||
| 220 | ! Loop over tags in layer card | ||
| 221 | !--------------------------------------------------------------------------- | ||
| 222 | − | tag_loop: do | |
| 223 | |||
| 224 | ! Check for end of file | ||
| 225 | !------------------------------------------------------------------------ | ||
| 226 | − | read(unit,'(A)',iostat=stat) buffer | |
| 227 | − | if(stat.ne.0)then | |
| 228 | write(err_msg,'("file encountered error (EoF?) before END ",A)') & | ||
| 229 | − | to_upper(this%name) | |
| 230 | − | call stop_program(err_msg) | |
| 231 | − | return | |
| 232 | end if | ||
| 233 | − | if(trim(adjustl(buffer)).eq."") cycle tag_loop | |
| 234 | |||
| 235 | ! Check for end of layer card | ||
| 236 | !------------------------------------------------------------------------ | ||
| 237 | − | if(trim(adjustl(buffer)).eq."END "//to_upper(trim(this%name)))then | |
| 238 | − | backspace(unit) | |
| 239 | − | exit tag_loop | |
| 240 | end if | ||
| 241 | |||
| 242 | − | tag=trim(adjustl(buffer)) | |
| 243 | − | if(scan(buffer,"=").ne.0) tag=trim(tag(:scan(tag,"=")-1)) | |
| 244 | |||
| 245 | ! Read parameters from save file | ||
| 246 | !------------------------------------------------------------------------ | ||
| 247 | − | select case(trim(tag)) | |
| 248 | case("INPUT_SHAPE") | ||
| 249 | − | call assign_vec(buffer, input_shape, itmp1) | |
| 250 | case("PADDING") | ||
| 251 | − | call assign_vec(buffer, padding, itmp1) | |
| 252 | case("METHOD") | ||
| 253 | − | call assign_val(buffer, method, itmp1) | |
| 254 | case default | ||
| 255 | ! Don't look for "e" due to scientific notation of numbers | ||
| 256 | ! ... i.e. exponent (E+00) | ||
| 257 | − | if(scan(to_lower(trim(adjustl(buffer))),& | |
| 258 | 'abcdfghijklmnopqrstuvwxyz').eq.0)then | ||
| 259 | − | cycle tag_loop | |
| 260 | − | elseif(tag(:3).eq.'END')then | |
| 261 | − | cycle tag_loop | |
| 262 | end if | ||
| 263 | write(err_msg,'("Unrecognised line in input file: ",A)') & | ||
| 264 | − | trim(adjustl(buffer)) | |
| 265 | − | call stop_program(err_msg) | |
| 266 | − | return | |
| 267 | end select | ||
| 268 | end do tag_loop | ||
| 269 | |||
| 270 | |||
| 271 | ! Set hyperparameters and initialise layer | ||
| 272 | !--------------------------------------------------------------------------- | ||
| 273 | − | call this%set_hyperparams(padding=padding, method=method, verbose=verbose_) | |
| 274 | − | call this%init(input_shape = input_shape) | |
| 275 | |||
| 276 | |||
| 277 | ! Check for end of layer card | ||
| 278 | !--------------------------------------------------------------------------- | ||
| 279 | − | read(unit,'(A)') buffer | |
| 280 | − | if(trim(adjustl(buffer)).ne."END "//to_upper(trim(this%name)))then | |
| 281 | − | write(0,*) trim(adjustl(buffer)) | |
| 282 | − | write(err_msg,'("END ",A," not where expected")') to_upper(this%name) | |
| 283 | − | call stop_program(err_msg) | |
| 284 | − | return | |
| 285 | end if | ||
| 286 | |||
| 287 | end subroutine read_pad2d | ||
| 288 | !############################################################################### | ||
| 289 | |||
| 290 | |||
| 291 | !############################################################################### | ||
| 292 | − | function read_pad2d_layer(unit, verbose) result(layer) | |
| 293 | !! Read 2D padding layer from file and return layer | ||
| 294 | implicit none | ||
| 295 | |||
| 296 | ! Arguments | ||
| 297 | integer, intent(in) :: unit | ||
| 298 | !! File unit | ||
| 299 | integer, optional, intent(in) :: verbose | ||
| 300 | !! Verbosity level | ||
| 301 | class(base_layer_type), allocatable :: layer | ||
| 302 | !! Instance of the 2D padding layer | ||
| 303 | |||
| 304 | ! Local variables | ||
| 305 | integer :: verbose_ = 0 | ||
| 306 | !! Verbosity level | ||
| 307 | |||
| 308 | − | if(present(verbose)) verbose_ = verbose | |
| 309 | − | allocate(layer, source=pad2d_layer_type(padding=[0,0], method="none")) | |
| 310 | − | call layer%read(unit, verbose=verbose_) | |
| 311 | |||
| 312 | − | end function read_pad2d_layer | |
| 313 | !############################################################################### | ||
| 314 | |||
| 315 | |||
| 316 | !############################################################################### | ||
| 317 | − | subroutine build_from_onnx_pad2d( & | |
| 318 | − | this, node, initialisers, value_info, verbose & | |
| 319 | ) | ||
| 320 | !! Read ONNX attributes for 2D padding layer | ||
| 321 | implicit none | ||
| 322 | |||
| 323 | ! Arguments | ||
| 324 | class(pad2d_layer_type), intent(inout) :: this | ||
| 325 | !! Instance of the 2D padding layer | ||
| 326 | type(onnx_node_type), intent(in) :: node | ||
| 327 | !! ONNX node information | ||
| 328 | type(onnx_initialiser_type), dimension(:), intent(in) :: initialisers | ||
| 329 | !! ONNX initialiser information | ||
| 330 | type(onnx_tensor_type), dimension(:), intent(in) :: value_info | ||
| 331 | !! ONNX value info | ||
| 332 | integer, intent(in) :: verbose | ||
| 333 | !! Verbosity level | ||
| 334 | |||
| 335 | ! Local variables | ||
| 336 | integer :: i | ||
| 337 | !! Loop index | ||
| 338 | integer, dimension(2) :: padding | ||
| 339 | !! Padding sizes | ||
| 340 | character(256) :: val, mode | ||
| 341 | !! Attribute value and mode | ||
| 342 | |||
| 343 | ! Set default values | ||
| 344 | − | padding = 0 | |
| 345 | − | mode = "constant" | |
| 346 | |||
| 347 | ! Parse ONNX attributes | ||
| 348 | − | do i = 1, size(node%attributes) | |
| 349 | − | val = node%attributes(i)%val | |
| 350 | − | select case(trim(adjustl(node%attributes(i)%name))) | |
| 351 | case("pads") | ||
| 352 | − | read(val,*) padding | |
| 353 | case("mode") | ||
| 354 | − | mode = trim(adjustl(val)) | |
| 355 | case default | ||
| 356 | ! Do nothing | ||
| 357 | write(0,*) "WARNING: Unrecognised attribute in ONNX PAD2D & | ||
| 358 | − | &layer: ", trim(adjustl(node%attributes(i)%name)) | |
| 359 | end select | ||
| 360 | end do | ||
| 361 | |||
| 362 | ! Check size of initialisers | ||
| 363 | − | if(size(initialisers).gt.0)then | |
| 364 | − | write(0,*) "WARNING: initialisers found for ONNX PAD2D layer" | |
| 365 | end if | ||
| 366 | |||
| 367 | call this%set_hyperparams( & | ||
| 368 | padding = padding, & | ||
| 369 | method = mode, & | ||
| 370 | verbose = verbose & | ||
| 371 | − | ) | |
| 372 | |||
| 373 | − | end subroutine build_from_onnx_pad2d | |
| 374 | !############################################################################### | ||
| 375 | |||
| 376 | |||
| 377 | !##############################################################################! | ||
| 378 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 379 | !##############################################################################! | ||
| 380 | |||
| 381 | |||
| 382 | !############################################################################### | ||
| 383 | − | subroutine forward_pad2d(this, input) | |
| 384 | !! Forward propagation | ||
| 385 | implicit none | ||
| 386 | |||
| 387 | ! Arguments | ||
| 388 | class(pad2d_layer_type), intent(inout) :: this | ||
| 389 | !! Instance of the 2D padding layer | ||
| 390 | class(array_type), dimension(:,:), intent(in) :: input | ||
| 391 | !! Input values | ||
| 392 | |||
| 393 | ! Local variables | ||
| 394 | type(array_type), pointer :: ptr | ||
| 395 | !! Pointer array | ||
| 396 | |||
| 397 | |||
| 398 | − | call this%output(1,1)%zero_grad() | |
| 399 | − | ptr => pad2d(input(1,1), this%facets, this%pad, this%imethod) | |
| 400 | − | call this%output(1,1)%assign_and_deallocate_source(ptr) | |
| 401 | − | this%output(1,1)%is_temporary = .false. | |
| 402 | |||
| 403 | − | end subroutine forward_pad2d | |
| 404 | !############################################################################### | ||
| 405 | |||
| 406 | − | end module athena__pad2d_layer | |
| 407 |