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