lisp/progmodes/mixal-mode.el

   1 ;;; mixal-mode.el --- Major mode for the mix asm language.
   2
   3 ;; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Author: Pieter E.J. Pareit <pieter.pareit@gmail.com>
   7 ;; Maintainer: Pieter E.J. Pareit <pieter.pareit@gmail.com>
   8 ;; Created: 09 Nov 2002
   9 ;; Version: 0.1
  10 ;; Keywords: languages Knuth mix mixal asm mixvm "The Art Of Computer Programming"
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28 ;; Major mode for the mix asm language.
  29 ;; The mix asm language is described in "The Art Of Computer Programming".
  30 ;;
  31 ;; For optimal use, also use GNU MDK.  Compiling needs mixasm, running
  32 ;; and debugging needs mixvm and mixvm.el from GNU MDK.  You can get
  33 ;; GNU MDK from `https://savannah.gnu.org/projects/mdk/' and
  34 ;; `ftp://ftp.gnu.org/pub/gnu/mdk'.
  35 ;;
  36 ;; To use this mode, place the following in your .emacs file:
  37 ;; `(load-file "/PATH-TO-FILE/mixal-mode.el")'.
  38 ;; When you load a file with the extension .mixal the mode will be started
  39 ;; automatic.  If you want to start the mode manual, use `M-x mixal-mode'.
  40 ;; Font locking will work, the behavior of tabs is the same as Emacs's
  41 ;; default behavior.  You can compile a source file with `C-c c' you can
  42 ;; run a compiled file with `C-c r' or run it in debug mode with `C-c d'.
  43 ;; You can get more information about a particular operation code by using
  44 ;; mixal-describe-operation-code or `C-h o'.
  45 ;;
  46 ;; Have fun.
  47
  48 ;;; History:
  49 ;; Version 0.3:
  50 ;; 12/10/05: Stefan Monnier <monnier@iro.umontreal.ca>
  51 ;;           Use font-lock-syntactic-keywords to detect/mark comments.
  52 ;;           Use [^ \t\n]+ to match the operand part of a line.
  53 ;;           Drop mixal-operation-codes.
  54 ;;           Build the mixal-operation-codes-alist immediately.
  55 ;;           Use `interactive' in mixal-describe-operation-code.
  56 ;;           Remove useless ".*$" at the end of some regexps.
  57 ;;           Fix the definition of comment-start-skip.
  58 ;; 08/10/05: sync mdk and emacs cvs
  59 ;;           from emacs: compile-command and require-final-newline
  60 ;;           from mdk:   see version 0.2
  61 ;;           correct my email address
  62 ;; Version 0.2:
  63 ;; 06/04/05: mixasm no longer needs -g option
  64 ;;           fontlocking of comments works in all? cases now
  65 ;;           added some more mixal-operation-codes
  66 ;; Version 0.1:
  67 ;; Version 0.1.1:
  68 ;; 22/11/02: bugfix in fontlocking, needed to add a '-' to the regex.
  69 ;; 19/11/02: completed implementing mixal-describe-operation-code.
  70 ;; 13/11/02: implemented compile, mixal-run and mixal-debug.
  71 ;; 10/11/02: implemented font-locking and syntax table.
  72 ;; 09/11/02: started mixal-mode.
  73
  74 ;;; Code:
  75 (defvar compile-command)
  76
  77 ;;; Key map
  78 (defvar mixal-mode-map
  79   (let ((map (make-sparse-keymap)))
  80     (define-key map "\C-c\C-c" 'compile)
  81     (define-key map "\C-c\C-r" 'mixal-run)
  82     (define-key map "\C-c\C-d" 'mixal-debug)
  83     (define-key map "\C-h\C-o" 'mixal-describe-operation-code)
  84     map)
  85   "Keymap for `mixal-mode'.")
  86 ;; (makunbound 'mixal-mode-map)
  87
  88 ;;; Syntax table
  89 (defvar mixal-mode-syntax-table
  90   (let ((st (make-syntax-table)))
  91     ;; We need to do a bit more to make fontlocking for comments work.
  92     ;; See mixal-font-lock-syntactic-keywords.
  93     ;; (modify-syntax-entry ?* "<" st)
  94     (modify-syntax-entry ?\n ">" st)
  95     st)
  96   "Syntax table for `mixal-mode'.")
  97
  98 (defvar mixal-font-lock-label-face 'font-lock-variable-name-face
  99   "Face name to use for label names.
 100 Default value is that of `font-lock-variable-name-face', but you can modify
 101 its value.")
 102
 103 (defvar mixal-font-lock-operation-code-face 'font-lock-keyword-face
 104   "Face name to use for operation code names.
 105 Default value is that of `font-lock-keyword-face', but you can modify its
 106 value.")
 107
 108 (defvar mixal-font-lock-assembly-pseudoinstruction-face 'font-lock-builtin-face
 109   "Face name to use for assembly pseudoinstruction names.
 110 Default value is that of `font-lock-builtin-face', but you can modify its
 111 value.")
 112
 113 (defvar mixal-assembly-pseudoinstructions
 114   '("ORIG" "EQU" "CON" "ALF" "END")
 115   "List of possible assembly pseudoinstructions.")
 116
 117 ;;;; Compilation
 118 ;; Output from mixasm is compatible with default behavior of emacs,
 119 ;; I just added a key (C-cc) and modified the make-command.
 120
 121 ;;;; Indentation
 122 ;; Tabs works well by default.
 123
 124 ;;;; Describe
 125 (defvar mixal-operation-codes-alist
 126   ;; FIXME: the codes FADD, FSUB, FMUL, FDIV, JRAD, and FCMP were in
 127   ;; mixal-operation-codes but not here.  They should probably be added here.
 128   ;;
 129   ;; We used to define this with a backquote and subexps like ,(+ 8 3) for
 130   ;; better clarity, but the resulting code was too big and caused the
 131   ;; byte-compiler to eat up all the stack space.  Even using
 132   ;; `eval-when-compile' didn't help because the byte-compiler insists on
 133   ;; compiling the code before evaluating it.
 134   '((LDA loading "load A" 8 field
 135          "Put in rA the contents of cell no. M.
 136 Uses a + when there is no sign in subfield. Subfield is left padded with
 137 zeros to make a word."
 138          2)
 139
 140     (LDX loading "load X" 15 field
 141          "Put in rX the contents of cell no. M.
 142 Uses a + when there is no sign in subfield. Subfield is left padded with
 143 zeros to make a word."
 144          2)
 145
 146     (LD1 loading "load I1" 9 field
 147          "Put in rI1 the contents of cell no. M.
 148 Uses a + when there is no sign in subfield. Subfield is left padded with
 149 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 150 to set anything more that that will result in undefined behavior."
 151          2)
 152
 153     (LD2 loading "load I2" 10 field
 154          "Put in rI2 the contents of cell no. M.
 155 Uses a + when there is no sign in subfield. Subfield is left padded with
 156 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 157 to set anything more that that will result in undefined behavior."
 158          2)
 159
 160     (LD3 loading "load I3" 11 field
 161          "Put in rI3 the contents of cell no. M.
 162 Uses a + when there is no sign in subfield. Subfield is left padded with
 163 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 164 to set anything more that that will result in undefined behavior."
 165          2)
 166
 167     (LD4 loading "load I4" 12 field
 168          "Put in rI4 the contents of cell no. M.
 169 Uses a + when there is no sign in subfield. Subfield is left padded with
 170 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 171 to set anything more that that will result in undefined behavior."
 172          2)
 173
 174     (LD5 loading "load I5" 13 field
 175          "Put in rI5 the contents of cell no. M.
 176 Uses a + when there is no sign in subfield. Subfield is left padded with
 177 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 178 to set anything more that that will result in undefined behavior."
 179          2)
 180
 181     (LD6 loading "load I6" 14 field
 182          "Put in rI6 the contents of cell no. M.
 183 Uses a + when there is no sign in subfield. Subfield is left padded with
 184 zeros to make a word. Index registers only have 2 bytes and a sign, Trying
 185 to set anything more that that will result in undefined behavior."
 186          2)
 187
 188     (LDAN loading "load A negative" 16 field
 189           "Put in rA the contents of cell no. M, with opposite sign.
 190 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 191 Subfield is left padded with zeros to make a word."
 192           2)
 193
 194     (LDXN loading "load X negative" 23 field
 195           "Put in rX the contents of cell no. M, with opposite sign.
 196 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 197 Subfield is left padded with zeros to make a word."
 198           2)
 199
 200     (LD1N loading "load I1 negative" 17 field
 201           "Put in rI1 the contents of cell no. M, with opposite sign.
 202 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 203 Subfield is left padded with zeros to make a word. Index registers only
 204 have 2 bytes and a sign, Trying to set anything more that that will result
 205 in undefined behavior."
 206           2)
 207
 208     (LD2N loading "load I2 negative" 18 field
 209           "Put in rI2 the contents of cell no. M, with opposite sign.
 210 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 211 Subfield is left padded with zeros to make a word. Index registers only
 212 have 2 bytes and a sign, Trying to set anything more that that will result
 213 in undefined behavior."
 214           2)
 215
 216     (LD3N loading "load I3 negative" 19 field
 217           "Put in rI3 the contents of cell no. M, with opposite sign.
 218 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 219 Subfield is left padded with zeros to make a word. Index registers only
 220 have 2 bytes and a sign, Trying to set anything more that that will result
 221 in undefined behavior."
 222           2)
 223
 224     (LD4N loading "load I4 negative" 20 field
 225           "Put in rI4 the contents of cell no. M, with opposite sign.
 226 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 227 Subfield is left padded with zeros to make a word. Index registers only
 228 have 2 bytes and a sign, Trying to set anything more that that will result
 229 in undefined behavior."
 230           2)
 231
 232     (LD5N loading "load I5 negative" 21 field
 233           "Put in rI5 the contents of cell no. M, with opposite sign.
 234 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 235 Subfield is left padded with zeros to make a word. Index registers only
 236 have 2 bytes and a sign, Trying to set anything more that that will result
 237 in undefined behavior."
 238           2)
 239
 240     (LD6N loading "load I6 negative" 22 field
 241           "Put in rI6 the contents of cell no. M, with opposite sign.
 242 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 243 Subfield is left padded with zeros to make a word. Index registers only
 244 have 2 bytes and a sign, Trying to set anything more that that will result
 245 in undefined behavior."
 246           2)
 247
 248     (STA storing "store A" 24 field
 249          "Store in cell Nr. M the contents of rA.
 250 The modification of the operation code represents the subfield of the
 251 memory cell that is to be overwritten with bytes from a register. These
 252 bytes are taken beginning by the rightmost side of the register. The
 253 sign of the memory cell is not changed, unless it is part of the subfield."
 254          2)
 255
 256     (STX storing "store X" 31 field
 257          "Store in cell Nr. M the contents of rX.
 258 The modification of the operation code represents the subfield of the
 259 memory cell that is to be overwritten with bytes from a register. These
 260 bytes are taken beginning by the rightmost side of the register. The
 261 sign of the memory cell is not changed, unless it is part of the subfield."
 262          2)
 263
 264     (ST1 storing "store I1" 25 field
 265          "Store in cell Nr. M the contents of rI1.
 266 The modification of the operation code represents the subfield of the
 267 memory cell that is to be overwritten with bytes from a register. These
 268 bytes are taken beginning by the rightmost side of the register. The
 269 sign of the memory cell is not changed, unless it is part of the subfield.
 270 Because index registers only have 2 bytes and a sign, the rest of the bytes
 271 are assumed to be 0."
 272          2)
 273
 274     (ST2 storing "store I2" 26 field
 275          "Store in cell Nr. M the contents of rI2.
 276 The modification of the operation code represents the subfield of the
 277 memory cell that is to be overwritten with bytes from a register. These
 278 bytes are taken beginning by the rightmost side of the register. The
 279 sign of the memory cell is not changed, unless it is part of the subfield.
 280 Because index registers only have 2 bytes and a sign, the rest of the bytes
 281 are assumed to be 0."
 282          2)
 283
 284     (ST3 storing "store I3" 27 field
 285          "Store in cell Nr. M the contents of rI3.
 286 The modification of the operation code represents the subfield of the
 287 memory cell that is to be overwritten with bytes from a register. These
 288 bytes are taken beginning by the rightmost side of the register. The
 289 sign of the memory cell is not changed, unless it is part of the subfield.
 290 Because index registers only have 2 bytes and a sign, the rest of the bytes
 291 are assumed to be 0."
 292          2)
 293
 294     (ST4 storing "store I4" 28 field
 295          "Store in cell Nr. M the contents of rI4.
 296 The modification of the operation code represents the subfield of the
 297 memory cell that is to be overwritten with bytes from a register. These
 298 bytes are taken beginning by the rightmost side of the register. The
 299 sign of the memory cell is not changed, unless it is part of the subfield.
 300 Because index registers only have 2 bytes and a sign, the rest of the bytes
 301 are assumed to be 0."
 302          2)
 303
 304     (ST5 storing "store I5" 29 field
 305          "Store in cell Nr. M the contents of rI5.
 306 The modification of the operation code represents the subfield of the
 307 memory cell that is to be overwritten with bytes from a register. These
 308 bytes are taken beginning by the rightmost side of the register. The
 309 sign of the memory cell is not changed, unless it is part of the subfield.
 310 Because index registers only have 2 bytes and a sign, the rest of the bytes
 311 are assumed to be 0."
 312          2)
 313
 314     (ST6 storing "store I6" 30 field
 315          "Store in cell Nr. M the contents of rI6.
 316 The modification of the operation code represents the subfield of the
 317 memory cell that is to be overwritten with bytes from a register. These
 318 bytes are taken beginning by the rightmost side of the register. The
 319 sign of the memory cell is not changed, unless it is part of the subfield.
 320 Because index registers only have 2 bytes and a sign, the rest of the bytes
 321 are assumed to be 0."
 322          2)
 323
 324     (STJ storing "store J" 32 field
 325          "Store in cell Nr. M the contents of rJ.
 326 The modification of the operation code represents the subfield of the
 327 memory cell that is to be overwritten with bytes from a register. These
 328 bytes are taken beginning by the rightmost side of the register. The sign
 329 of rJ is always +, sign of the memory cell is not changed, unless it is
 330 part of the subfield. The default field for STJ is (0:2)."
 331          2)
 332
 333     (STZ storing "store zero" 33 field
 334          "Store in cell Nr. M '+ 0'.
 335 The modification of the operation code represents the subfield of the
 336 memory cell that is to be overwritten with zeros."
 337          2)
 338
 339     (ADD arithmetic "add" 1 field
 340          "Add to A the contents of cell Nr. M.
 341 Subfield is padded with zero to make a word.
 342 If the result is to large, the operation result modulo 1,073,741,823 (the
 343 maximum value storable in a MIX word) is stored in `rA', and the overflow
 344 toggle is set to TRUE."
 345          2)
 346
 347     (SUB arithmetic "subtract" 2 field
 348          "Subtract to A the contents of cell Nr. M.
 349 Subfield is padded with zero to make a word.
 350 If the result is to large, the operation result modulo 1,073,741,823 (the
 351 maximum value storable in a MIX word) is stored in `rA', and the overflow
 352 toggle is set to TRUE."
 353          2)
 354
 355     (MUL arithmetic "multiply" 3 field
 356          "Multiplies the contents of cell Nr. M with A, result is 10 bytes and stored in rA and rX.
 357 The sign is + if the sign of rA and cell M where the same, otherwise, it is -"
 358          10)
 359
 360     (DIV arithmetic "divide" 4 field
 361          "Both rA and rX are taken together and divided by cell Nr. M, quotient is placed in rA, remainder in rX.
 362 The sign is taken from rA, and after the divide the sign of rA is set to + when
 363 both the sign of rA and M where the same. Divide by zero and overflow of rA
 364 result in undefined behavior."
 365          12)
 366
 367     (ENTA address-transfer "enter A" 48
 368           "Literal value is stored in rA.
 369 Indexed, stores value of index in rA."
 370           1)
 371
 372     (ENTX address-transfer "enter X" 55
 373           "Literal value is stored in rX.
 374 Indexed, stores value of index in rX."
 375           1)
 376
 377     (ENT1 address-transfer "Enter rI1" 49
 378           "Literal value is stored in rI1.
 379 Indexed, stores value of index in rI1."
 380           1)
 381
 382     (ENT2 address-transfer "Enter rI2" 50
 383           "Literal value is stored in rI2.
 384 Indexed, stores value of index in rI2."
 385           1)
 386
 387     (ENT3 address-transfer "Enter rI3" 51
 388           "Literal value is stored in rI3.
 389 Indexed, stores value of index in rI3."
 390           1)
 391
 392     (ENT4 address-transfer "Enter rI4" 52
 393           "Literal value is stored in rI4.
 394 Indexed, stores value of index in rI4."
 395           1)
 396
 397     (ENT5 address-transfer "Enter rI5" 53
 398           "Literal value is stored in rI5.
 399 Indexed, stores value of index in rI5."
 400           1)
 401
 402     (ENT6 address-transfer "Enter rI6" 54
 403           "Literal value is stored in rI6.
 404 Indexed, stores value of index in rI6."
 405           1)
 406
 407     (ENNA address-transfer "enter negative A" 48
 408           "Literal value is stored in rA with opposite sign.
 409 Indexed, stores value of index in rA with opposite sign."
 410           1)
 411
 412     (ENNX address-transfer "enter negative X" 55
 413           "Literal value is stored in rX with opposite sign.
 414 Indexed, stores value of index in rX with opposite sign."
 415           1)
 416
 417     (ENN1 address-transfer "Enter negative rI1" 49
 418           "Literal value is stored in rI1 with opposite sign.
 419 Indexed, stores value of index in rI1 with opposite sign."
 420           1)
 421
 422     (ENN2 address-transfer "Enter negative rI2" 50
 423           "Literal value is stored in rI2 with opposite sign.
 424 Indexed, stores value of index in rI2 with opposite sign."
 425           1)
 426
 427     (ENN3 address-transfer "Enter negative rI3" 51
 428           "Literal value is stored in rI3 with opposite sign.
 429 Indexed, stores value of index in rI3 with opposite sign."
 430           1)
 431
 432     (ENN4 address-transfer "Enter negative rI4" 52
 433           "Literal value is stored in rI4 with opposite sign.
 434 Indexed, stores value of index in rI4 with opposite sign."
 435           1)
 436
 437     (ENN5 address-transfer "Enter negative rI5" 53
 438           "Literal value is stored in rI5 with opposite sign.
 439 Indexed, stores value of index in rI5 with opposite sign."
 440           1)
 441
 442     (ENN6 address-transfer "Enter negative rI6" 54
 443           "Literal value is stored in rI6 with opposite sign.
 444 Indexed, stores value of index in rI6 with opposite sign."
 445           1)
 446
 447     (INCA address-transfer "increase A" 48
 448           "Increase register A with the literal value of M.
 449 On overflow the overflow toggle is set."
 450           1)
 451
 452     (INCX address-transfer "increase X" 55
 453           "Increase register X with the literal value of M.
 454 On overflow the overflow toggle is set."
 455           1)
 456
 457     (INC1 address-transfer "increase I1" 49
 458           "Increase register I1 with the literal value of M.
 459 The result is undefined when the result does not fit in
 460 2 bytes."
 461           1)
 462
 463     (INC2 address-transfer "increase I2" 50
 464           "Increase register I2 with the literal value of M.
 465 The result is undefined when the result does not fit in
 466 2 bytes."
 467           1)
 468
 469     (INC3 address-transfer "increase I3" 51
 470           "Increase register I3 with the literal value of M.
 471 The result is undefined when the result does not fit in
 472 2 bytes."
 473           1)
 474
 475     (INC4 address-transfer "increase I4" 52
 476           "Increase register I4 with the literal value of M.
 477 The result is undefined when the result does not fit in
 478 2 bytes."
 479           1)
 480
 481     (INC5 address-transfer "increase I5" 53
 482           "Increase register I5 with the literal value of M.
 483 The result is undefined when the result does not fit in
 484 2 bytes."
 485           1)
 486
 487     (INC6 address-transfer "increase I6" 54
 488           "Increase register I6 with the literal value of M.
 489 The result is undefined when the result does not fit in
 490 2 bytes."
 491           1)
 492
 493     (DECA address-transfer "decrease A" 48
 494           "Decrease register A with the literal value of M.
 495 On overflow the overflow toggle is set."
 496           1)
 497
 498     (DECX address-transfer "decrease X" 55
 499           "Decrease register X with the literal value of M.
 500 On overflow the overflow toggle is set."
 501           1)
 502
 503     (DEC1 address-transfer "decrease I1" 49
 504           "Decrease register I1 with the literal value of M.
 505 The result is undefined when the result does not fit in
 506 2 bytes."
 507           1)
 508
 509     (DEC2 address-transfer "decrease I2" 50
 510           "Decrease register I2 with the literal value of M.
 511 The result is undefined when the result does not fit in
 512 2 bytes."
 513           1)
 514
 515     (DEC3 address-transfer "decrease I3" 51
 516           "Decrease register I3 with the literal value of M.
 517 The result is undefined when the result does not fit in
 518 2 bytes."
 519           1)
 520
 521     (DEC4 address-transfer "decrease I4" 52
 522           "Decrease register I4 with the literal value of M.
 523 The result is undefined when the result does not fit in
 524 2 bytes."
 525           1)
 526
 527     (DEC5 address-transfer "decrease I5" 53
 528           "Decrease register I5 with the literal value of M.
 529 The result is undefined when the result does not fit in
 530 2 bytes."
 531           1)
 532
 533     (DEC6 address-transfer "decrease I6" 54
 534           "Decrease register I6 with the literal value of M.
 535 The result is undefined when the result does not fit in
 536 2 bytes."
 537           1)
 538
 539     (CMPA comparison "compare A" 56 field
 540           "Compare contents of A with contents of M.
 541 The field specifier works on both fields. The comparison indicator
 542 is set to LESS, EQUAL or GREATER depending on the outcome."
 543           2)
 544
 545     (CMPX comparison "compare X" 63 field
 546           "Compare contents of rX with contents of M.
 547 The field specifier works on both fields. The comparison indicator
 548 is set to LESS, EQUAL or GREATER depending on the outcome."
 549           2)
 550
 551     (CMP1 comparison "compare I1" 57 field
 552           "Compare contents of rI1 with contents of M.
 553 The field specifier works on both fields. The comparison indicator
 554 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 555 have a value of 0."
 556           2)
 557
 558     (CMP2 comparison "compare I2" 58 field
 559           "Compare contents of rI2 with contents of M.
 560 The field specifier works on both fields. The comparison indicator
 561 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 562 have a value of 0."
 563           2)
 564
 565     (CMP3 comparison "compare I3" 59 field
 566           "Compare contents of rI3 with contents of M.
 567 The field specifier works on both fields. The comparison indicator
 568 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 569 have a value of 0."
 570           2)
 571
 572     (CMP4 comparison "compare I4" 60 field
 573           "Compare contents of rI4 with contents of M.
 574 The field specifier works on both fields. The comparison indicator
 575 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 576 have a value of 0."
 577           2)
 578
 579     (CMP5 comparison "compare I5" 61 field
 580           "Compare contents of rI5 with contents of M.
 581 The field specifier works on both fields. The comparison indicator
 582 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 583 have a value of 0."
 584           2)
 585
 586     (CMP6 comparison "compare I6" 62 field
 587           "Compare contents of rI6 with contents of M.
 588 The field specifier works on both fields. The comparison indicator
 589 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 590 have a value of 0."
 591           2)
 592
 593     (JMP jump "jump" 39
 594          "Unconditional jump.
 595 Register J is set to the value of the next instruction that would have
 596 been executed when there was no jump."
 597          1)
 598
 599     (JSJ jump "jump, save J" 39
 600          "Unconditional jump, but rJ is not modified."
 601          1)
 602
 603     (JOV jump "jump on overflow" 39
 604          "Jump if OV is set (and turn it off).
 605 Register J is set to the value of the next instruction that would have
 606 been executed when there was no jump."
 607          1)
 608
 609     (JNOV jump "Jump on no overflow" 39
 610           "Jump if OV is not set (and turn it off).
 611 Register J is set to the value of the next instruction that would have
 612 been executed when there was no jump."
 613           1)
 614
 615     (JL jump "Jump on less" 39
 616         "Jump if '[CM] = L'.
 617 Register J is set to the value of the next instruction that would have
 618 been executed when there was no jump."
 619         1)
 620
 621     (JE jump "Jump on equal" 39
 622         "Jump if '[CM] = E'.
 623 Register J is set to the value of the next instruction that would have
 624 been executed when there was no jump."
 625         1)
 626
 627     (JG jump "Jump on greater" 39
 628         "Jump if '[CM] = G'.
 629 Register J is set to the value of the next instruction that would have
 630 been executed when there was no jump."
 631         1)
 632
 633     (JGE jump "Jump on not less" 39
 634          "Jump if '[CM]' does not equal 'L'.
 635 Register J is set to the value of the next instruction that would have
 636 been executed when there was no jump."
 637          1)
 638
 639     (JNE jump "Jump on not equal" 39
 640          "Jump if '[CM]' does not equal 'E'.
 641 Register J is set to the value of the next instruction that would have
 642 been executed when there was no jump."
 643          1)
 644
 645     (JLE jump "Jump on not greater" 39
 646          "Jump if '[CM]' does not equal 'G'.
 647 Register J is set to the value of the next instruction that would have
 648 been executed when there was no jump."
 649          1)
 650
 651     (JAN jump "jump A negative" 40
 652          "Jump if the content of rA is negative.
 653 Register J is set to the value of the next instruction that would have
 654 been executed when there was no jump."
 655          1)
 656
 657     (JAZ jump "jump A zero" 40
 658          "Jump if the content of rA is zero.
 659 Register J is set to the value of the next instruction that would have
 660 been executed when there was no jump."
 661          1)
 662
 663     (JAP jump "jump A positive" 40
 664          "Jump if the content of rA is positive.
 665 Register J is set to the value of the next instruction that would have
 666 been executed when there was no jump."
 667          1)
 668
 669     (JANN jump "jump A non-negative" 40
 670           "Jump if the content of rA is non-negative.
 671 Register J is set to the value of the next instruction that would have
 672 been executed when there was no jump."
 673           1)
 674
 675     (JANZ jump "jump A non-zero" 40
 676           "Jump if the content of rA is non-zero.
 677 Register J is set to the value of the next instruction that would have
 678 been executed when there was no jump."
 679           1)
 680
 681     (JANP jump "jump A non-positive" 40
 682           "Jump if the content of rA is non-positive.
 683 Register J is set to the value of the next instruction that would have
 684 been executed when there was no jump."
 685           1)
 686
 687     (JXN jump "jump X negative" 47
 688          "Jump if the content of rX is negative.
 689 Register J is set to the value of the next instruction that would have
 690 been executed when there was no jump."
 691          1)
 692
 693     (JXZ jump "jump X zero" 47
 694          "Jump if the content of rX is zero.
 695 Register J is set to the value of the next instruction that would have
 696 been executed when there was no jump."
 697          1)
 698
 699     (JXP jump "jump X positive" 47
 700          "Jump if the content of rX is positive.
 701 Register J is set to the value of the next instruction that would have
 702 been executed when there was no jump."
 703          1)
 704
 705     (JXNN jump "jump X non-negative" 47
 706           "Jump if the content of rX is non-negative.
 707 Register J is set to the value of the next instruction that would have
 708 been executed when there was no jump."
 709           1)
 710
 711     (JXNZ jump "jump X non-zero" 47
 712           "Jump if the content of rX is non-zero.
 713 Register J is set to the value of the next instruction that would have
 714 been executed when there was no jump."
 715           1)
 716
 717     (JXNP jump "jump X non-positive" 47
 718           "Jump if the content of rX is non-positive.
 719 Register J is set to the value of the next instruction that would have
 720 been executed when there was no jump."
 721           1)
 722
 723     (J1N jump "jump I1 negative" 41
 724          "Jump if the content of rI1 is negative.
 725 Register J is set to the value of the next instruction that would have
 726 been executed when there was no jump."
 727          1)
 728
 729     (J1Z jump "jump I1 zero" 41
 730          "Jump if the content of rI1 is zero.
 731 Register J is set to the value of the next instruction that would have
 732 been executed when there was no jump."
 733          1)
 734
 735     (J1P jump "jump I1 positive" 41
 736          "Jump if the content of rI1 is positive.
 737 Register J is set to the value of the next instruction that would have
 738 been executed when there was no jump."
 739          1)
 740
 741     (J1NN jump "jump I1 non-negative" 41
 742           "Jump if the content of rI1 is non-negative.
 743 Register J is set to the value of the next instruction that would have
 744 been executed when there was no jump."
 745           1)
 746
 747     (J1NZ jump "jump I1 non-zero" 41
 748           "Jump if the content of rI1 is non-zero.
 749 Register J is set to the value of the next instruction that would have
 750 been executed when there was no jump."
 751           1)
 752
 753     (J1NP jump "jump I1 non-positive" 41
 754           "Jump if the content of rI1 is non-positive.
 755 Register J is set to the value of the next instruction that would have
 756 been executed when there was no jump."
 757           1)
 758
 759     (J2N jump "jump I2 negative" 41
 760          "Jump if the content of rI2 is negative.
 761 Register J is set to the value of the next instruction that would have
 762 been executed when there was no jump."
 763          1)
 764
 765     (J2Z jump "jump I2 zero" 41
 766          "Jump if the content of rI2 is zero.
 767 Register J is set to the value of the next instruction that would have
 768 been executed when there was no jump."
 769          1)
 770
 771     (J2P jump "jump I2 positive" 41
 772          "Jump if the content of rI2 is positive.
 773 Register J is set to the value of the next instruction that would have
 774 been executed when there was no jump."
 775          1)
 776
 777     (J2NN jump "jump I2 non-negative" 41
 778           "Jump if the content of rI2 is non-negative.
 779 Register J is set to the value of the next instruction that would have
 780 been executed when there was no jump."
 781           1)
 782
 783     (J2NZ jump "jump I2 non-zero" 41
 784           "Jump if the content of rI2 is non-zero.
 785 Register J is set to the value of the next instruction that would have
 786 been executed when there was no jump."
 787           1)
 788
 789     (J2NP jump "jump I2 non-positive" 41
 790           "Jump if the content of rI2 is non-positive.
 791 Register J is set to the value of the next instruction that would have
 792 been executed when there was no jump."
 793           1)
 794
 795     (J3N jump "jump I3 negative" 41
 796          "Jump if the content of rI3 is negative.
 797 Register J is set to the value of the next instruction that would have
 798 been executed when there was no jump."
 799          1)
 800
 801     (J3Z jump "jump I3 zero" 41
 802          "Jump if the content of rI3 is zero.
 803 Register J is set to the value of the next instruction that would have
 804 been executed when there was no jump."
 805          1)
 806
 807     (J3P jump "jump I3 positive" 41
 808          "Jump if the content of rI3 is positive.
 809 Register J is set to the value of the next instruction that would have
 810 been executed when there was no jump."
 811          1)
 812
 813     (J3NN jump "jump I3 non-negative" 41
 814           "Jump if the content of rI3 is non-negative.
 815 Register J is set to the value of the next instruction that would have
 816 been executed when there was no jump."
 817           1)
 818
 819     (J3NZ jump "jump I3 non-zero" 41
 820           "Jump if the content of rI3 is non-zero.
 821 Register J is set to the value of the next instruction that would have
 822 been executed when there was no jump."
 823           1)
 824
 825     (J3NP jump "jump I3 non-positive" 41
 826           "Jump if the content of rI3 is non-positive.
 827 Register J is set to the value of the next instruction that would have
 828 been executed when there was no jump."
 829           1)
 830
 831     (J4N jump "jump I4 negative" 41
 832          "Jump if the content of rI4 is negative.
 833 Register J is set to the value of the next instruction that would have
 834 been executed when there was no jump."
 835          1)
 836
 837     (J4Z jump "jump I4 zero" 41
 838          "Jump if the content of rI4 is zero.
 839 Register J is set to the value of the next instruction that would have
 840 been executed when there was no jump."
 841          1)
 842
 843     (J4P jump "jump I4 positive" 41
 844          "Jump if the content of rI4 is positive.
 845 Register J is set to the value of the next instruction that would have
 846 been executed when there was no jump."
 847          1)
 848
 849     (J4NN jump "jump I4 non-negative" 41
 850           "Jump if the content of rI4 is non-negative.
 851 Register J is set to the value of the next instruction that would have
 852 been executed when there was no jump."
 853           1)
 854
 855     (J4NZ jump "jump I4 non-zero" 41
 856           "Jump if the content of rI4 is non-zero.
 857 Register J is set to the value of the next instruction that would have
 858 been executed when there was no jump."
 859           1)
 860
 861     (J4NP jump "jump I4 non-positive" 41
 862           "Jump if the content of rI4 is non-positive.
 863 Register J is set to the value of the next instruction that would have
 864 been executed when there was no jump."
 865           1)
 866
 867     (J5N jump "jump I5 negative" 41
 868          "Jump if the content of rI5 is negative.
 869 Register J is set to the value of the next instruction that would have
 870 been executed when there was no jump."
 871          1)
 872
 873     (J5Z jump "jump I5 zero" 41
 874          "Jump if the content of rI5 is zero.
 875 Register J is set to the value of the next instruction that would have
 876 been executed when there was no jump."
 877          1)
 878
 879     (J5P jump "jump I5 positive" 41
 880          "Jump if the content of rI5 is positive.
 881 Register J is set to the value of the next instruction that would have
 882 been executed when there was no jump."
 883          1)
 884
 885     (J5NN jump "jump I5 non-negative" 41
 886           "Jump if the content of rI5 is non-negative.
 887 Register J is set to the value of the next instruction that would have
 888 been executed when there was no jump."
 889           1)
 890
 891     (J5NZ jump "jump I5 non-zero" 41
 892           "Jump if the content of rI5 is non-zero.
 893 Register J is set to the value of the next instruction that would have
 894 been executed when there was no jump."
 895           1)
 896
 897     (J5NP jump "jump I5 non-positive" 41
 898           "Jump if the content of rI5 is non-positive.
 899 Register J is set to the value of the next instruction that would have
 900 been executed when there was no jump."
 901           1)
 902
 903     (J6N jump "jump I6 negative" 41
 904          "Jump if the content of rI6 is negative.
 905 Register J is set to the value of the next instruction that would have
 906 been executed when there was no jump."
 907          1)
 908
 909     (J6Z jump "jump I6 zero" 41
 910          "Jump if the content of rI6 is zero.
 911 Register J is set to the value of the next instruction that would have
 912 been executed when there was no jump."
 913          1)
 914
 915     (J6P jump "jump I6 positive" 41
 916          "Jump if the content of rI6 is positive.
 917 Register J is set to the value of the next instruction that would have
 918 been executed when there was no jump."
 919          1)
 920
 921     (J6NN jump "jump I6 non-negative" 41
 922           "Jump if the content of rI6 is non-negative.
 923 Register J is set to the value of the next instruction that would have
 924 been executed when there was no jump."
 925           1)
 926
 927     (J6NZ jump "jump I6 non-zero" 41
 928           "Jump if the content of rI6 is non-zero.
 929 Register J is set to the value of the next instruction that would have
 930 been executed when there was no jump."
 931           1)
 932
 933     (J6NP jump "jump I6 non-positive" 41
 934           "Jump if the content of rI6 is non-positive.
 935 Register J is set to the value of the next instruction that would have
 936 been executed when there was no jump."
 937           1)
 938
 939     (SLA miscellaneous "shift left A" 6
 940          "Shift to A, M bytes left.
 941 Hero's will be added to the right."
 942          2)
 943
 944     (SRA miscellaneous "shift right A" 6
 945          "Shift to A, M bytes right.
 946 Zeros will be added to the left."
 947          2)
 948
 949     (SLAX miscellaneous "shift left AX" 6
 950           "Shift AX, M bytes left.
 951 Zeros will be added to the right."
 952           2)
 953
 954
 955     (SRAX miscellaneous "shift right AX" 6
 956           "Shift AX, M bytes right.
 957 Zeros will be added to the left."
 958           2)
 959
 960     (SLC miscellaneous "shift left AX circularly" 6
 961          "Shift AX, M bytes left circularly.
 962 The bytes that fall off to the left will be added to the right."
 963          2)
 964
 965     (SRC miscellaneous "shift right AX circularly" 6
 966          "Shift AX, M bytes right circularly.
 967 The bytes that fall off to the right will be added to the left."
 968          2)
 969
 970     (MOVE miscellaneous "move" 7 number
 971           "Move MOD words from M to the location stored in rI1."
 972           (+ 1 (* 2 number)))
 973
 974     (NOP miscellaneous "no operation" 0 ignored
 975          "No operation, M and F are not used by the machine."
 976          1)
 977
 978     (HLT miscellaneous "halt" 5
 979          "Halt.
 980 Stop instruction fetching."
 981          1)
 982
 983     (IN input-output "input" 36 unit
 984         "Transfer a block of words from the specified unit to memory.
 985 The transfer starts at address M."
 986         1)
 987
 988     (OUT input-output "output" 37 unit
 989          "Transfer a block of words from memory.
 990 The transfer starts at address M to the specified unit."
 991          1)
 992
 993     (IOC input-output "input-output control" 35 unit
 994          "Perform a control operation.
 995 The control operation is given by M on the specified unit."
 996          1)
 997
 998     (JRED input-output "jump ready" 38 unit
 999           "Jump to M if the specified unit is ready."
1000           1)
1001
1002     (JBUS input-output "jump busy" 34 unit
1003           "Jump to M if the specified unit is busy."
1004           1)
1005
1006     (NUM conversion "convert to numeric" 5
1007          "Convert rAX to its numerical value and store it in rA.
1008 the register rAX is assumed to contain a character representation of
1009 a number."
1010          10)
1011
1012     (CHAR conversion "convert to characters" 5
1013           "Convert the number stored in rA to a character representation.
1014 The converted character representation is stored in rAX."
1015           10))
1016
1017   "Alist that contains all the possible operation codes for mix.
1018 Each elt has the form
1019   (OP-CODE GROUP FULL-NAME C-BYTE F-BYTE DESCRIPTION EXECUTION-TIME)
1020 Where OP-CODE is the text of the opcode as a symbol,
1021 FULL-NAME is the human readable name as a string,
1022 C-BYTE is the operation code telling what operation is to be performed,
1023 F-BYTE holds a modification of the operation code which can be a symbol
1024   or a number,
1025 DESCRIPTION contains an string with a description about the operation code and
1026 EXECUTION-TIME holds info about the time it takes, number or string.")
1027 ;; (makunbound 'mixal-operation-codes-alist)
1028
1029
1030 ;;; Font-locking:
1031 (defvar mixal-font-lock-syntactic-keywords
1032   ;; Normal comments start with a * in column 0 and end at end of line.
1033   '(("^\\*" (0 '(11)))                  ;(string-to-syntax "<") == '(11)
1034     ;; Every line can end with a comment which is placed after the operand.
1035     ;; I assume here that mnemonics without operands can not have a comment.
1036     ("^[[:alnum:]]*[ \t]+[[:alnum:]]+[ \t]+[^ \n\t]+[ \t]*\\([ \t]\\)[^\n \t]"
1037      (1 '(11)))))
1038
1039 (defvar mixal-font-lock-keywords
1040   `(("^\\([A-Z0-9a-z]+\\)"
1041      (1 mixal-font-lock-label-face))
1042     (,(regexp-opt (mapcar (lambda (x) (symbol-name (car x)))
1043                           mixal-operation-codes-alist) 'words)
1044      . mixal-font-lock-operation-code-face)
1045     (,(regexp-opt mixal-assembly-pseudoinstructions 'words)
1046      . mixal-font-lock-assembly-pseudoinstruction-face)
1047     ("^[A-Z0-9a-z]*[ \t]+[A-ZO-9a-z]+[ \t]+\\(=.*=\\)"
1048      (1 font-lock-constant-face)))
1049   "Keyword highlighting specification for `mixal-mode'.")
1050 ;; (makunbound 'mixal-font-lock-keywords)
1051
1052 (defvar mixal-describe-operation-code-history nil
1053   "History list for describe operation code.")
1054
1055 (defun mixal-describe-operation-code (op-code)
1056   "Display the full documentation of OP-CODE."
1057   (interactive
1058    (list
1059     (let* ((completion-ignore-case t)
1060            ;; we already have a list, but it is not in the right format
1061            ;; transform it to a valid table so completition can use it
1062            (table (mapcar '(lambda (elm)
1063                              (cons (symbol-name (car elm)) nil))
1064                           mixal-operation-codes-alist))
1065            ;; prompt is different depending on we are close to a valid op-code
1066            (have-default (assq (intern-soft (current-word))
1067                                mixal-operation-codes-alist))
1068            (prompt (concat "Describe operation code "
1069                            (if have-default
1070                                (concat "(default " (current-word) "): ")
1071                              ": "))))
1072       ;; As the operation code to the user.
1073       (completing-read prompt table nil t nil
1074                        'mixal-describe-operation-code-history
1075                        (current-word)))))
1076   ;; get the info on the op-code and output it to the help buffer
1077   (let ((op-code-help (assq (intern-soft op-code) mixal-operation-codes-alist)))
1078     (when op-code-help
1079       (with-output-to-temp-buffer (buffer-name (get-buffer-create "*Help*"))
1080         (princ op-code) (princ " is an mix operation code\n\n")
1081         (princ (nth 5 op-code-help)) (terpri) (terpri)
1082         (princ "      group: ") (princ (nth 1 op-code-help)) (terpri)
1083         (princ "  nice name: ") (princ (nth 2 op-code-help)) (terpri)
1084         (princ " OPCODE / C: ") (princ (nth 3 op-code-help)) (terpri)
1085         (princ "    MOD / F: ") (princ (nth 4 op-code-help)) (terpri)
1086         (princ "       time: ") (princ (nth 6 op-code-help)) (terpri)))))
1087
1088 ;;;; Running
1089 (defun mixal-run ()
1090   "Run mixal file in current buffer, assumes that file has been compiled."
1091   (interactive)
1092   (if (fboundp 'mixvm)
1093       (mixvm (concat "mixvm -r -t -d "
1094                      (file-name-sans-extension (buffer-file-name))))
1095     (error "mixvm.el needs to be loaded to run `mixvm'")))
1096
1097 (defun mixal-debug ()
1098   "Start mixvm for debugging.
1099 Assumes that file has been compiled with debugging support."
1100   (interactive)
1101   (if (fboundp 'mixvm)
1102       (mixvm (concat "mixvm "
1103                      (file-name-sans-extension (buffer-file-name))))
1104     (error "mixvm.el needs to be loaded to run `mixvm'")))
1105
1106 ;;;###autoload
1107 (define-derived-mode mixal-mode fundamental-mode "mixal"
1108   "Major mode for the mixal asm language.
1109 \\{mixal-mode-map}"
1110   (set (make-local-variable 'comment-start) "*")
1111   (set (make-local-variable 'comment-start-skip) "^\\*[ \t]*")
1112   (set (make-local-variable 'font-lock-defaults)
1113        `(mixal-font-lock-keywords nil nil nil nil
1114          (font-lock-syntactic-keywords . ,mixal-font-lock-syntactic-keywords)
1115          (parse-sexp-lookup-properties . t)))
1116   ;; might add an indent function in the future
1117   ;;  (set (make-local-variable 'indent-line-function) 'mixal-indent-line)
1118   (set (make-local-variable 'compile-command) (concat "mixasm "
1119                                                       buffer-file-name))
1120   ;; mixasm will do strange when there is no final newline,
1121   ;; so let Emacs ensure that it is always there
1122   (set (make-local-variable 'require-final-newline)
1123        mode-require-final-newline))
1124
1125 ;;;###autoload
1126 (add-to-list 'auto-mode-alist '("\\.mixal\\'" . mixal-mode))
1127
1128 (provide 'mixal-mode)
1129
1130 ;; arch-tag: be7c128a-bf61-4951-a90e-9398267ce3f3
1131 ;;; mixal-mode.el ends here