-- Common types. -- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold -- -- GHDL is free software; you can redistribute it and/or modify it under -- the terms of the GNU General Public License as published by the Free -- Software Foundation; either version 2, or (at your option) any later -- version. -- -- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY -- WARRANTY; without even the implied warranty of MERCHANTABILITY or -- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- for more details. -- -- You should have received a copy of the GNU General Public License -- along with GHDL; see the file COPYING. If not, write to the Free -- Software Foundation, 59 Temple Place - Suite 330, Boston, MA -- 02111-1307, USA. with Interfaces; package Types is pragma Preelaborate (Types); -- A tri state type. type Tri_State_Type is (Unknown, False, True); -- 32 bits integer. type Int32 is range -2**31 .. 2**31 - 1; for Int32'Size use 32; subtype Nat32 is Int32 range 0 .. Int32'Last; subtype Pos32 is Nat32 range 1 .. Nat32'Last; type Uns32 is new Interfaces.Unsigned_32; type Fp64 is new Interfaces.IEEE_Float_64; -- iir_int32 is aimed at containing integer literal values. type Iir_Int32 is new Interfaces.Integer_32; -- iir_int64 is aimed at containing units values. type Iir_Int64 is new Interfaces.Integer_64; -- iir_fp32 is aimed at containing floating point values. type Iir_Fp32 is new Interfaces.IEEE_Float_32; -- iir_fp64 is aimed at containing floating point values. subtype Iir_Fp64 is Fp64; -- iir_index32 is aimed at containing an array index. type Iir_Index32 is new Nat32; -- Useful type. type String_Acc is access String; type String_Cst is access constant String; type String_Acc_Array is array (Natural range <>) of String_Acc; type String_Fat is array (Pos32) of Character; type String_Fat_Acc is access String_Fat; -- Array of iir_int32. -- Used by recording feature of scan. type Iir_Int32_Array is array (Natural range <>) of Iir_Int32; type Iir_Int32_Array_Acc is access Iir_Int32_Array; -- Type of a name table element. -- The name table is defined in the name_table package. type Name_Id is new Nat32; -- null entry in the name table. -- It is sure that this entry is never allocated. Null_Identifier: constant Name_Id := 0; -- Type of a string stored into the string table. type String_Id is new Nat32; for String_Id'Size use 32; Null_String : constant String_Id := 0; -- Index type is the source file table. -- This table is defined in the files_map package. type Source_File_Entry is new Nat32; No_Source_File_Entry: constant Source_File_Entry := 0; -- FIXME: additional source file entries to create: -- *std.standard*: for those created in std.standard -- *error*: for erroneous one -- *command-line*: used for identifiers from command line -- (eg: unit to elab) -- Index into a file buffer. type Source_Ptr is new Int32; -- Lower boundary of any file buffer. Source_Ptr_Org : constant Source_Ptr := 0; -- Bad file buffer index (used to mark no line). Source_Ptr_Bad : constant Source_Ptr := -1; -- This type contains everything necessary to get a file name, a line -- number and a column number. type Location_Type is new Nat32; for Location_Type'Size use 32; Location_Nil : constant Location_Type := 0; -- Type of a file buffer. type File_Buffer is array (Source_Ptr range <>) of Character; type File_Buffer_Acc is access File_Buffer; -- PSL Node. type PSL_Node is new Int32; -- PSL NFA type PSL_NFA is new Int32; -- Indentation. -- This is used by all packages that display vhdl code or informations. Indentation : constant := 2; -- String representing a date/time (format is YYYYMMDDHHmmSS.sss). subtype Time_Stamp_String is String (1 .. 18); type Time_Stamp_Id is new String_Id; Null_Time_Stamp : constant Time_Stamp_Id := 0; -- Self-explaining: raised when an internal error (such as consistency) -- is detected. Internal_Error: exception; -- In some case, a low level subprogram can't handle error -- (e.g eval_pos). In this case it is easier to raise an exception and -- let upper level subprograms handle the case. Node_Error : exception; end Types; 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 
```
yosys -- Yosys Open SYnthesis Suite

Copyright (C) 2012 - 2020  Claire Xenia Wolf <claire@yosyshq.com>

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
```


yosys – Yosys Open SYnthesis Suite
===================================

This is a framework for RTL synthesis tools. It currently has
extensive Verilog-2005 support and provides a basic set of
synthesis algorithms for various application domains.

Yosys can be adapted to perform any synthesis job by combining
the existing passes (algorithms) using synthesis scripts and
adding additional passes as needed by extending the yosys C++
code base.

Yosys is free software licensed under the ISC license (a GPL
compatible license that is similar in terms to the MIT license
or the 2-clause BSD license).


Web Site and Other Resources
============================

More information and documentation can be found on the Yosys web site:
- https://yosyshq.net/yosys/

The "Documentation" page on the web site contains links to more resources,
including a manual that even describes some of the Yosys internals:
- https://yosyshq.net/yosys/documentation.html

The directory `guidelines` contains additional information
for people interested in using the Yosys C++ APIs.

Users interested in formal verification might want to use the formal verification
front-end for Yosys, SymbiYosys:
- https://symbiyosys.readthedocs.io/en/latest/
- https://github.com/YosysHQ/SymbiYosys


Installation
============

Yosys is part of the [Tabby CAD Suite](https://www.yosyshq.com/tabby-cad-datasheet) and the [OSS CAD Suite](https://github.com/YosysHQ/oss-cad-suite-build)! The easiest way to use yosys is to install the binary software suite, which contains all required dependencies and related tools.

* [Contact YosysHQ](https://www.yosyshq.com/contact) for a [Tabby CAD Suite](https://www.yosyshq.com/tabby-cad-datasheet) Evaluation License and download link