lisp/progmodes/mixal-mode.el

   1 ;;; mixal-mode.el --- Major mode for the mix asm language.
   2
   3 ;; Copyright (C) 2003-2015 Free Software Foundation, Inc.
   4
   5 ;; Author: Pieter E.J. Pareit <pieter.pareit@gmail.com>
   6 ;; Maintainer: Pieter E.J. Pareit <pieter.pareit@gmail.com>
   7 ;; Created: 09 Nov 2002
   8 ;; Version: 0.1
   9 ;; Keywords: languages, Knuth, mix, mixal, asm, mixvm, The Art Of Computer Programming
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27 ;; Major mode for the mix asm language.
  28 ;; The mix asm language is described in "The Art Of Computer Programming".
  29 ;;
  30 ;; For optimal use, also use GNU MDK.  Compiling needs mixasm, running
  31 ;; and debugging needs mixvm and mixvm.el from GNU MDK.  You can get
  32 ;; GNU MDK from `https://savannah.gnu.org/projects/mdk/' and
  33 ;; `ftp://ftp.gnu.org/pub/gnu/mdk'.
  34 ;;
  35 ;; To use this mode, place the following in your init file:
  36 ;; `(load-file "/PATH-TO-FILE/mixal-mode.el")'.
  37 ;; When you load a file with the extension .mixal the mode will be started
  38 ;; automatic.  If you want to start the mode manual, use `M-x mixal-mode'.
  39 ;; Font locking will work, the behavior of tabs is the same as Emacs's
  40 ;; default behavior.  You can compile a source file with `C-c c' you can
  41 ;; run a compiled file with `C-c r' or run it in debug mode with `C-c d'.
  42 ;; You can get more information about a particular operation code by using
  43 ;; mixal-describe-operation-code or `C-h o'.
  44 ;;
  45 ;; Have fun.
  46
  47 ;;; History:
  48 ;; Version 0.3:
  49 ;; 12/10/05: Stefan Monnier <monnier@iro.umontreal.ca>
  50 ;;           Use font-lock-syntactic-keywords to detect/mark comments.
  51 ;;           Use [^ \t\n]+ to match the operand part of a line.
  52 ;;           Drop mixal-operation-codes.
  53 ;;           Build the mixal-operation-codes-alist immediately.
  54 ;;           Use `interactive' in mixal-describe-operation-code.
  55 ;;           Remove useless ".*$" at the end of some regexps.
  56 ;;           Fix the definition of comment-start-skip.
  57 ;; 08/10/05: sync mdk and emacs cvs
  58 ;;           from emacs: compile-command and require-final-newline
  59 ;;           from mdk:   see version 0.2
  60 ;;           correct my email address
  61 ;; Version 0.2:
  62 ;; 06/04/05: mixasm no longer needs -g option
  63 ;;           fontlocking of comments works in all? cases now
  64 ;;           added some more mixal-operation-codes
  65 ;; Version 0.1:
  66 ;; Version 0.1.1:
  67 ;; 22/11/02: bugfix in fontlocking, needed to add a '-' to the regex.
  68 ;; 19/11/02: completed implementing mixal-describe-operation-code.
  69 ;; 13/11/02: implemented compile, mixal-run and mixal-debug.
  70 ;; 10/11/02: implemented font-locking and syntax table.
  71 ;; 09/11/02: started mixal-mode.
  72
  73 ;;; Code:
  74 (defvar compile-command)
  75
  76 ;;; Key map
  77 (defvar mixal-mode-map
  78   (let ((map (make-sparse-keymap)))
  79     (define-key map "\C-c\C-c" 'compile)
  80     (define-key map "\C-c\C-r" 'mixal-run)
  81     (define-key map "\C-c\C-d" 'mixal-debug)
  82     (define-key map "\C-h\C-o" 'mixal-describe-operation-code)
  83     map)
  84   "Keymap for `mixal-mode'.")
  85 ;; (makunbound 'mixal-mode-map)
  86
  87 ;;; Syntax table
  88 (defvar mixal-mode-syntax-table
  89   (let ((st (make-syntax-table)))
  90     ;; We need to do a bit more to make fontlocking for comments work.
  91     ;; See use of syntax-propertize-function.
  92     ;; (modify-syntax-entry ?* "<" st)
  93     (modify-syntax-entry ?\n ">" st)
  94     st)
  95   "Syntax table for `mixal-mode'.")
  96
  97 (defvar mixal-font-lock-label-face 'font-lock-variable-name-face
  98   "Face name to use for label names.
  99 Default value is that of `font-lock-variable-name-face', but you can modify
 100 its value.")
 101
 102 (defvar mixal-font-lock-operation-code-face 'font-lock-keyword-face
 103   "Face name to use for operation code names.
 104 Default value is that of `font-lock-keyword-face', but you can modify its
 105 value.")
 106
 107 (defvar mixal-font-lock-assembly-pseudoinstruction-face 'font-lock-builtin-face
 108   "Face name to use for assembly pseudoinstruction names.
 109 Default value is that of `font-lock-builtin-face', but you can modify its
 110 value.")
 111
 112 (defvar mixal-assembly-pseudoinstructions
 113   '("ORIG" "EQU" "CON" "ALF" "END")
 114   "List of possible assembly pseudoinstructions.")
 115
 116 ;;;; Compilation
 117 ;; Output from mixasm is compatible with default behavior of emacs,
 118 ;; I just added a key (C-cc) and modified the make-command.
 119
 120 ;;;; Indentation
 121 ;; Tabs works well by default.
 122
 123 ;;;; Describe
 124 (defvar mixal-operation-codes-alist
 125   ;; FIXME: the codes FADD, FSUB, FMUL, FDIV, JRAD, and FCMP were in
 126   ;; mixal-operation-codes but not here.  They should probably be added here.
 127   ;;
 128   ;; We used to define this with a backquote and subexps like ,(+ 8 3) for
 129   ;; better clarity, but the resulting code was too big and caused the
 130   ;; byte-compiler to eat up all the stack space.  Even using
 131   ;; `eval-when-compile' didn't help because the byte-compiler insists on
 132   ;; compiling the code before evaluating it.
 133   '((LDA loading "load A" 8 field
 134          "Put in rA the contents of cell no. M.
 135 Uses a + when there is no sign in subfield. Subfield is left padded with
 136 zeros to make a word."
 137          2)
 138
 139     (LDX loading "load X" 15 field
 140          "Put in rX the contents of cell no. M.
 141 Uses a + when there is no sign in subfield. Subfield is left padded with
 142 zeros to make a word."
 143          2)
 144
 145     (LD1 loading "load I1" 9 field
 146          "Put in rI1 the contents of cell no. M.
 147 Uses a + when there is no sign in subfield. Subfield is left padded with
 148 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 149 to set anything more than that will result in undefined behavior."
 150          2)
 151
 152     (LD2 loading "load I2" 10 field
 153          "Put in rI2 the contents of cell no. M.
 154 Uses a + when there is no sign in subfield. Subfield is left padded with
 155 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 156 to set anything more than that will result in undefined behavior."
 157          2)
 158
 159     (LD3 loading "load I3" 11 field
 160          "Put in rI3 the contents of cell no. M.
 161 Uses a + when there is no sign in subfield. Subfield is left padded with
 162 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 163 to set anything more than that will result in undefined behavior."
 164          2)
 165
 166     (LD4 loading "load I4" 12 field
 167          "Put in rI4 the contents of cell no. M.
 168 Uses a + when there is no sign in subfield. Subfield is left padded with
 169 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 170 to set anything more than that will result in undefined behavior."
 171          2)
 172
 173     (LD5 loading "load I5" 13 field
 174          "Put in rI5 the contents of cell no. M.
 175 Uses a + when there is no sign in subfield. Subfield is left padded with
 176 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 177 to set anything more than that will result in undefined behavior."
 178          2)
 179
 180     (LD6 loading "load I6" 14 field
 181          "Put in rI6 the contents of cell no. M.
 182 Uses a + when there is no sign in subfield. Subfield is left padded with
 183 zeros to make a word. Index registers only have 2 bytes and a sign; trying
 184 to set anything more than that will result in undefined behavior."
 185          2)
 186
 187     (LDAN loading "load A negative" 16 field
 188           "Put in rA the contents of cell no. M, with opposite sign.
 189 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 190 Subfield is left padded with zeros to make a word."
 191           2)
 192
 193     (LDXN loading "load X negative" 23 field
 194           "Put in rX the contents of cell no. M, with opposite sign.
 195 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 196 Subfield is left padded with zeros to make a word."
 197           2)
 198
 199     (LD1N loading "load I1 negative" 17 field
 200           "Put in rI1 the contents of cell no. M, with opposite sign.
 201 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 202 Subfield is left padded with zeros to make a word. Index registers only
 203 have 2 bytes and a sign; trying to set anything more than that will result
 204 in undefined behavior."
 205           2)
 206
 207     (LD2N loading "load I2 negative" 18 field
 208           "Put in rI2 the contents of cell no. M, with opposite sign.
 209 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 210 Subfield is left padded with zeros to make a word. Index registers only
 211 have 2 bytes and a sign; trying to set anything more than that will result
 212 in undefined behavior."
 213           2)
 214
 215     (LD3N loading "load I3 negative" 19 field
 216           "Put in rI3 the contents of cell no. M, with opposite sign.
 217 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 218 Subfield is left padded with zeros to make a word. Index registers only
 219 have 2 bytes and a sign; trying to set anything more than that will result
 220 in undefined behavior."
 221           2)
 222
 223     (LD4N loading "load I4 negative" 20 field
 224           "Put in rI4 the contents of cell no. M, with opposite sign.
 225 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 226 Subfield is left padded with zeros to make a word. Index registers only
 227 have 2 bytes and a sign; trying to set anything more than that will result
 228 in undefined behavior."
 229           2)
 230
 231     (LD5N loading "load I5 negative" 21 field
 232           "Put in rI5 the contents of cell no. M, with opposite sign.
 233 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 234 Subfield is left padded with zeros to make a word. Index registers only
 235 have 2 bytes and a sign; trying to set anything more than that will result
 236 in undefined behavior."
 237           2)
 238
 239     (LD6N loading "load I6 negative" 22 field
 240           "Put in rI6 the contents of cell no. M, with opposite sign.
 241 Uses a + when there is no sign in subfield, otherwise use the opposite sign.
 242 Subfield is left padded with zeros to make a word. Index registers only
 243 have 2 bytes and a sign; trying to set anything more than that will result
 244 in undefined behavior."
 245           2)
 246
 247     (STA storing "store A" 24 field
 248          "Store in cell Nr. M the contents of rA.
 249 The modification of the operation code represents the subfield of the
 250 memory cell that is to be overwritten with bytes from a register. These
 251 bytes are taken beginning by the rightmost side of the register. The
 252 sign of the memory cell is not changed, unless it is part of the subfield."
 253          2)
 254
 255     (STX storing "store X" 31 field
 256          "Store in cell Nr. M the contents of rX.
 257 The modification of the operation code represents the subfield of the
 258 memory cell that is to be overwritten with bytes from a register. These
 259 bytes are taken beginning by the rightmost side of the register. The
 260 sign of the memory cell is not changed, unless it is part of the subfield."
 261          2)
 262
 263     (ST1 storing "store I1" 25 field
 264          "Store in cell Nr. M the contents of rI1.
 265 The modification of the operation code represents the subfield of the
 266 memory cell that is to be overwritten with bytes from a register. These
 267 bytes are taken beginning by the rightmost side of the register. The
 268 sign of the memory cell is not changed, unless it is part of the subfield.
 269 Because index registers only have 2 bytes and a sign, the rest of the bytes
 270 are assumed to be 0."
 271          2)
 272
 273     (ST2 storing "store I2" 26 field
 274          "Store in cell Nr. M the contents of rI2.
 275 The modification of the operation code represents the subfield of the
 276 memory cell that is to be overwritten with bytes from a register. These
 277 bytes are taken beginning by the rightmost side of the register. The
 278 sign of the memory cell is not changed, unless it is part of the subfield.
 279 Because index registers only have 2 bytes and a sign, the rest of the bytes
 280 are assumed to be 0."
 281          2)
 282
 283     (ST3 storing "store I3" 27 field
 284          "Store in cell Nr. M the contents of rI3.
 285 The modification of the operation code represents the subfield of the
 286 memory cell that is to be overwritten with bytes from a register. These
 287 bytes are taken beginning by the rightmost side of the register. The
 288 sign of the memory cell is not changed, unless it is part of the subfield.
 289 Because index registers only have 2 bytes and a sign, the rest of the bytes
 290 are assumed to be 0."
 291          2)
 292
 293     (ST4 storing "store I4" 28 field
 294          "Store in cell Nr. M the contents of rI4.
 295 The modification of the operation code represents the subfield of the
 296 memory cell that is to be overwritten with bytes from a register. These
 297 bytes are taken beginning by the rightmost side of the register. The
 298 sign of the memory cell is not changed, unless it is part of the subfield.
 299 Because index registers only have 2 bytes and a sign, the rest of the bytes
 300 are assumed to be 0."
 301          2)
 302
 303     (ST5 storing "store I5" 29 field
 304          "Store in cell Nr. M the contents of rI5.
 305 The modification of the operation code represents the subfield of the
 306 memory cell that is to be overwritten with bytes from a register. These
 307 bytes are taken beginning by the rightmost side of the register. The
 308 sign of the memory cell is not changed, unless it is part of the subfield.
 309 Because index registers only have 2 bytes and a sign, the rest of the bytes
 310 are assumed to be 0."
 311          2)
 312
 313     (ST6 storing "store I6" 30 field
 314          "Store in cell Nr. M the contents of rI6.
 315 The modification of the operation code represents the subfield of the
 316 memory cell that is to be overwritten with bytes from a register. These
 317 bytes are taken beginning by the rightmost side of the register. The
 318 sign of the memory cell is not changed, unless it is part of the subfield.
 319 Because index registers only have 2 bytes and a sign, the rest of the bytes
 320 are assumed to be 0."
 321          2)
 322
 323     (STJ storing "store J" 32 field
 324          "Store in cell Nr. M the contents of rJ.
 325 The modification of the operation code represents the subfield of the
 326 memory cell that is to be overwritten with bytes from a register. These
 327 bytes are taken beginning by the rightmost side of the register. The sign
 328 of rJ is always +, sign of the memory cell is not changed, unless it is
 329 part of the subfield. The default field for STJ is (0:2)."
 330          2)
 331
 332     (STZ storing "store zero" 33 field
 333          "Store in cell Nr. M '+ 0'.
 334 The modification of the operation code represents the subfield of the
 335 memory cell that is to be overwritten with zeros."
 336          2)
 337
 338     (ADD arithmetic "add" 1 field
 339          "Add to A the contents of cell Nr. M.
 340 Subfield is padded with zero to make a word.
 341 If the result is to large, the operation result modulo 1,073,741,823 (the
 342 maximum value storable in a MIX word) is stored in `rA', and the overflow
 343 toggle is set to TRUE."
 344          2)
 345
 346     (SUB arithmetic "subtract" 2 field
 347          "Subtract to A the contents of cell Nr. M.
 348 Subfield is padded with zero to make a word.
 349 If the result is to large, the operation result modulo 1,073,741,823 (the
 350 maximum value storable in a MIX word) is stored in `rA', and the overflow
 351 toggle is set to TRUE."
 352          2)
 353
 354     (MUL arithmetic "multiply" 3 field
 355          "Multiplies the contents of cell Nr. M with A, result is 10 bytes and stored in rA and rX.
 356 The sign is + if the sign of rA and cell M where the same, otherwise, it is -"
 357          10)
 358
 359     (DIV arithmetic "divide" 4 field
 360          "Both rA and rX are taken together and divided by cell Nr. M, quotient is placed in rA, remainder in rX.
 361 The sign is taken from rA, and after the divide the sign of rA is set to + when
 362 both the sign of rA and M where the same. Divide by zero and overflow of rA
 363 result in undefined behavior."
 364          12)
 365
 366     (ENTA address-transfer "enter A" 48
 367           "Literal value is stored in rA.
 368 Indexed, stores value of index in rA."
 369           1)
 370
 371     (ENTX address-transfer "enter X" 55
 372           "Literal value is stored in rX.
 373 Indexed, stores value of index in rX."
 374           1)
 375
 376     (ENT1 address-transfer "Enter rI1" 49
 377           "Literal value is stored in rI1.
 378 Indexed, stores value of index in rI1."
 379           1)
 380
 381     (ENT2 address-transfer "Enter rI2" 50
 382           "Literal value is stored in rI2.
 383 Indexed, stores value of index in rI2."
 384           1)
 385
 386     (ENT3 address-transfer "Enter rI3" 51
 387           "Literal value is stored in rI3.
 388 Indexed, stores value of index in rI3."
 389           1)
 390
 391     (ENT4 address-transfer "Enter rI4" 52
 392           "Literal value is stored in rI4.
 393 Indexed, stores value of index in rI4."
 394           1)
 395
 396     (ENT5 address-transfer "Enter rI5" 53
 397           "Literal value is stored in rI5.
 398 Indexed, stores value of index in rI5."
 399           1)
 400
 401     (ENT6 address-transfer "Enter rI6" 54
 402           "Literal value is stored in rI6.
 403 Indexed, stores value of index in rI6."
 404           1)
 405
 406     (ENNA address-transfer "enter negative A" 48
 407           "Literal value is stored in rA with opposite sign.
 408 Indexed, stores value of index in rA with opposite sign."
 409           1)
 410
 411     (ENNX address-transfer "enter negative X" 55
 412           "Literal value is stored in rX with opposite sign.
 413 Indexed, stores value of index in rX with opposite sign."
 414           1)
 415
 416     (ENN1 address-transfer "Enter negative rI1" 49
 417           "Literal value is stored in rI1 with opposite sign.
 418 Indexed, stores value of index in rI1 with opposite sign."
 419           1)
 420
 421     (ENN2 address-transfer "Enter negative rI2" 50
 422           "Literal value is stored in rI2 with opposite sign.
 423 Indexed, stores value of index in rI2 with opposite sign."
 424           1)
 425
 426     (ENN3 address-transfer "Enter negative rI3" 51
 427           "Literal value is stored in rI3 with opposite sign.
 428 Indexed, stores value of index in rI3 with opposite sign."
 429           1)
 430
 431     (ENN4 address-transfer "Enter negative rI4" 52
 432           "Literal value is stored in rI4 with opposite sign.
 433 Indexed, stores value of index in rI4 with opposite sign."
 434           1)
 435
 436     (ENN5 address-transfer "Enter negative rI5" 53
 437           "Literal value is stored in rI5 with opposite sign.
 438 Indexed, stores value of index in rI5 with opposite sign."
 439           1)
 440
 441     (ENN6 address-transfer "Enter negative rI6" 54
 442           "Literal value is stored in rI6 with opposite sign.
 443 Indexed, stores value of index in rI6 with opposite sign."
 444           1)
 445
 446     (INCA address-transfer "increase A" 48
 447           "Increase register A with the literal value of M.
 448 On overflow the overflow toggle is set."
 449           1)
 450
 451     (INCX address-transfer "increase X" 55
 452           "Increase register X with the literal value of M.
 453 On overflow the overflow toggle is set."
 454           1)
 455
 456     (INC1 address-transfer "increase I1" 49
 457           "Increase register I1 with the literal value of M.
 458 The result is undefined when the result does not fit in
 459 2 bytes."
 460           1)
 461
 462     (INC2 address-transfer "increase I2" 50
 463           "Increase register I2 with the literal value of M.
 464 The result is undefined when the result does not fit in
 465 2 bytes."
 466           1)
 467
 468     (INC3 address-transfer "increase I3" 51
 469           "Increase register I3 with the literal value of M.
 470 The result is undefined when the result does not fit in
 471 2 bytes."
 472           1)
 473
 474     (INC4 address-transfer "increase I4" 52
 475           "Increase register I4 with the literal value of M.
 476 The result is undefined when the result does not fit in
 477 2 bytes."
 478           1)
 479
 480     (INC5 address-transfer "increase I5" 53
 481           "Increase register I5 with the literal value of M.
 482 The result is undefined when the result does not fit in
 483 2 bytes."
 484           1)
 485
 486     (INC6 address-transfer "increase I6" 54
 487           "Increase register I6 with the literal value of M.
 488 The result is undefined when the result does not fit in
 489 2 bytes."
 490           1)
 491
 492     (DECA address-transfer "decrease A" 48
 493           "Decrease register A with the literal value of M.
 494 On overflow the overflow toggle is set."
 495           1)
 496
 497     (DECX address-transfer "decrease X" 55
 498           "Decrease register X with the literal value of M.
 499 On overflow the overflow toggle is set."
 500           1)
 501
 502     (DEC1 address-transfer "decrease I1" 49
 503           "Decrease register I1 with the literal value of M.
 504 The result is undefined when the result does not fit in
 505 2 bytes."
 506           1)
 507
 508     (DEC2 address-transfer "decrease I2" 50
 509           "Decrease register I2 with the literal value of M.
 510 The result is undefined when the result does not fit in
 511 2 bytes."
 512           1)
 513
 514     (DEC3 address-transfer "decrease I3" 51
 515           "Decrease register I3 with the literal value of M.
 516 The result is undefined when the result does not fit in
 517 2 bytes."
 518           1)
 519
 520     (DEC4 address-transfer "decrease I4" 52
 521           "Decrease register I4 with the literal value of M.
 522 The result is undefined when the result does not fit in
 523 2 bytes."
 524           1)
 525
 526     (DEC5 address-transfer "decrease I5" 53
 527           "Decrease register I5 with the literal value of M.
 528 The result is undefined when the result does not fit in
 529 2 bytes."
 530           1)
 531
 532     (DEC6 address-transfer "decrease I6" 54
 533           "Decrease register I6 with the literal value of M.
 534 The result is undefined when the result does not fit in
 535 2 bytes."
 536           1)
 537
 538     (CMPA comparison "compare A" 56 field
 539           "Compare contents of A with contents of M.
 540 The field specifier works on both fields. The comparison indicator
 541 is set to LESS, EQUAL or GREATER depending on the outcome."
 542           2)
 543
 544     (CMPX comparison "compare X" 63 field
 545           "Compare contents of rX with contents of M.
 546 The field specifier works on both fields. The comparison indicator
 547 is set to LESS, EQUAL or GREATER depending on the outcome."
 548           2)
 549
 550     (CMP1 comparison "compare I1" 57 field
 551           "Compare contents of rI1 with contents of M.
 552 The field specifier works on both fields. The comparison indicator
 553 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 554 have a value of 0."
 555           2)
 556
 557     (CMP2 comparison "compare I2" 58 field
 558           "Compare contents of rI2 with contents of M.
 559 The field specifier works on both fields. The comparison indicator
 560 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 561 have a value of 0."
 562           2)
 563
 564     (CMP3 comparison "compare I3" 59 field
 565           "Compare contents of rI3 with contents of M.
 566 The field specifier works on both fields. The comparison indicator
 567 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 568 have a value of 0."
 569           2)
 570
 571     (CMP4 comparison "compare I4" 60 field
 572           "Compare contents of rI4 with contents of M.
 573 The field specifier works on both fields. The comparison indicator
 574 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 575 have a value of 0."
 576           2)
 577
 578     (CMP5 comparison "compare I5" 61 field
 579           "Compare contents of rI5 with contents of M.
 580 The field specifier works on both fields. The comparison indicator
 581 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 582 have a value of 0."
 583           2)
 584
 585     (CMP6 comparison "compare I6" 62 field
 586           "Compare contents of rI6 with contents of M.
 587 The field specifier works on both fields. The comparison indicator
 588 is set to LESS, EQUAL or GREATER depending on the outcome. Bit 1,2 and 3
 589 have a value of 0."
 590           2)
 591
 592     (JMP jump "jump" 39
 593          "Unconditional jump.
 594 Register J is set to the value of the next instruction that would have
 595 been executed when there was no jump."
 596          1)
 597
 598     (JSJ jump "jump, save J" 39
 599          "Unconditional jump, but rJ is not modified."
 600          1)
 601
 602     (JOV jump "jump on overflow" 39
 603          "Jump if OV is set (and turn it off).
 604 Register J is set to the value of the next instruction that would have
 605 been executed when there was no jump."
 606          1)
 607
 608     (JNOV jump "Jump on no overflow" 39
 609           "Jump if OV is not set (and turn it off).
 610 Register J is set to the value of the next instruction that would have
 611 been executed when there was no jump."
 612           1)
 613
 614     (JL jump "Jump on less" 39
 615         "Jump if '[CM] = L'.
 616 Register J is set to the value of the next instruction that would have
 617 been executed when there was no jump."
 618         1)
 619
 620     (JE jump "Jump on equal" 39
 621         "Jump if '[CM] = E'.
 622 Register J is set to the value of the next instruction that would have
 623 been executed when there was no jump."
 624         1)
 625
 626     (JG jump "Jump on greater" 39
 627         "Jump if '[CM] = G'.
 628 Register J is set to the value of the next instruction that would have
 629 been executed when there was no jump."
 630         1)
 631
 632     (JGE jump "Jump on not less" 39
 633          "Jump if '[CM]' does not equal 'L'.
 634 Register J is set to the value of the next instruction that would have
 635 been executed when there was no jump."
 636          1)
 637
 638     (JNE jump "Jump on not equal" 39
 639          "Jump if '[CM]' does not equal 'E'.
 640 Register J is set to the value of the next instruction that would have
 641 been executed when there was no jump."
 642          1)
 643
 644     (JLE jump "Jump on not greater" 39
 645          "Jump if '[CM]' does not equal 'G'.
 646 Register J is set to the value of the next instruction that would have
 647 been executed when there was no jump."
 648          1)
 649
 650     (JAN jump "jump A negative" 40
 651          "Jump if the content of rA is negative.
 652 Register J is set to the value of the next instruction that would have
 653 been executed when there was no jump."
 654          1)
 655
 656     (JAZ jump "jump A zero" 40
 657          "Jump if the content of rA is zero.
 658 Register J is set to the value of the next instruction that would have
 659 been executed when there was no jump."
 660          1)
 661
 662     (JAP jump "jump A positive" 40
 663          "Jump if the content of rA is positive.
 664 Register J is set to the value of the next instruction that would have
 665 been executed when there was no jump."
 666          1)
 667
 668     (JANN jump "jump A non-negative" 40
 669           "Jump if the content of rA is non-negative.
 670 Register J is set to the value of the next instruction that would have
 671 been executed when there was no jump."
 672           1)
 673
 674     (JANZ jump "jump A non-zero" 40
 675           "Jump if the content of rA is non-zero.
 676 Register J is set to the value of the next instruction that would have
 677 been executed when there was no jump."
 678           1)
 679
 680     (JANP jump "jump A non-positive" 40
 681           "Jump if the content of rA is non-positive.
 682 Register J is set to the value of the next instruction that would have
 683 been executed when there was no jump."
 684           1)
 685
 686     (JXN jump "jump X negative" 47
 687          "Jump if the content of rX is negative.
 688 Register J is set to the value of the next instruction that would have
 689 been executed when there was no jump."
 690          1)
 691
 692     (JXZ jump "jump X zero" 47
 693          "Jump if the content of rX is zero.
 694 Register J is set to the value of the next instruction that would have
 695 been executed when there was no jump."
 696          1)
 697
 698     (JXP jump "jump X positive" 47
 699          "Jump if the content of rX is positive.
 700 Register J is set to the value of the next instruction that would have
 701 been executed when there was no jump."
 702          1)
 703
 704     (JXNN jump "jump X non-negative" 47
 705           "Jump if the content of rX is non-negative.
 706 Register J is set to the value of the next instruction that would have
 707 been executed when there was no jump."
 708           1)
 709
 710     (JXNZ jump "jump X non-zero" 47
 711           "Jump if the content of rX is non-zero.
 712 Register J is set to the value of the next instruction that would have
 713 been executed when there was no jump."
 714           1)
 715
 716     (JXNP jump "jump X non-positive" 47
 717           "Jump if the content of rX is non-positive.
 718 Register J is set to the value of the next instruction that would have
 719 been executed when there was no jump."
 720           1)
 721
 722     (J1N jump "jump I1 negative" 41
 723          "Jump if the content of rI1 is negative.
 724 Register J is set to the value of the next instruction that would have
 725 been executed when there was no jump."
 726          1)
 727
 728     (J1Z jump "jump I1 zero" 41
 729          "Jump if the content of rI1 is zero.
 730 Register J is set to the value of the next instruction that would have
 731 been executed when there was no jump."
 732          1)
 733
 734     (J1P jump "jump I1 positive" 41
 735          "Jump if the content of rI1 is positive.
 736 Register J is set to the value of the next instruction that would have
 737 been executed when there was no jump."
 738          1)
 739
 740     (J1NN jump "jump I1 non-negative" 41
 741           "Jump if the content of rI1 is non-negative.
 742 Register J is set to the value of the next instruction that would have
 743 been executed when there was no jump."
 744           1)
 745
 746     (J1NZ jump "jump I1 non-zero" 41
 747           "Jump if the content of rI1 is non-zero.
 748 Register J is set to the value of the next instruction that would have
 749 been executed when there was no jump."
 750           1)
 751
 752     (J1NP jump "jump I1 non-positive" 41
 753           "Jump if the content of rI1 is non-positive.
 754 Register J is set to the value of the next instruction that would have
 755 been executed when there was no jump."
 756           1)
 757
 758     (J2N jump "jump I2 negative" 41
 759          "Jump if the content of rI2 is negative.
 760 Register J is set to the value of the next instruction that would have
 761 been executed when there was no jump."
 762          1)
 763
 764     (J2Z jump "jump I2 zero" 41
 765          "Jump if the content of rI2 is zero.
 766 Register J is set to the value of the next instruction that would have
 767 been executed when there was no jump."
 768          1)
 769
 770     (J2P jump "jump I2 positive" 41
 771          "Jump if the content of rI2 is positive.
 772 Register J is set to the value of the next instruction that would have
 773 been executed when there was no jump."
 774          1)
 775
 776     (J2NN jump "jump I2 non-negative" 41
 777           "Jump if the content of rI2 is non-negative.
 778 Register J is set to the value of the next instruction that would have
 779 been executed when there was no jump."
 780           1)
 781
 782     (J2NZ jump "jump I2 non-zero" 41
 783           "Jump if the content of rI2 is non-zero.
 784 Register J is set to the value of the next instruction that would have
 785 been executed when there was no jump."
 786           1)
 787
 788     (J2NP jump "jump I2 non-positive" 41
 789           "Jump if the content of rI2 is non-positive.
 790 Register J is set to the value of the next instruction that would have
 791 been executed when there was no jump."
 792           1)
 793
 794     (J3N jump "jump I3 negative" 41
 795          "Jump if the content of rI3 is negative.
 796 Register J is set to the value of the next instruction that would have
 797 been executed when there was no jump."
 798          1)
 799
 800     (J3Z jump "jump I3 zero" 41
 801          "Jump if the content of rI3 is zero.
 802 Register J is set to the value of the next instruction that would have
 803 been executed when there was no jump."
 804          1)
 805
 806     (J3P jump "jump I3 positive" 41
 807          "Jump if the content of rI3 is positive.
 808 Register J is set to the value of the next instruction that would have
 809 been executed when there was no jump."
 810          1)
 811
 812     (J3NN jump "jump I3 non-negative" 41
 813           "Jump if the content of rI3 is non-negative.
 814 Register J is set to the value of the next instruction that would have
 815 been executed when there was no jump."
 816           1)
 817
 818     (J3NZ jump "jump I3 non-zero" 41
 819           "Jump if the content of rI3 is non-zero.
 820 Register J is set to the value of the next instruction that would have
 821 been executed when there was no jump."
 822           1)
 823
 824     (J3NP jump "jump I3 non-positive" 41
 825           "Jump if the content of rI3 is non-positive.
 826 Register J is set to the value of the next instruction that would have
 827 been executed when there was no jump."
 828           1)
 829
 830     (J4N jump "jump I4 negative" 41
 831          "Jump if the content of rI4 is negative.
 832 Register J is set to the value of the next instruction that would have
 833 been executed when there was no jump."
 834          1)
 835
 836     (J4Z jump "jump I4 zero" 41
 837          "Jump if the content of rI4 is zero.
 838 Register J is set to the value of the next instruction that would have
 839 been executed when there was no jump."
 840          1)
 841
 842     (J4P jump "jump I4 positive" 41
 843          "Jump if the content of rI4 is positive.
 844 Register J is set to the value of the next instruction that would have
 845 been executed when there was no jump."
 846          1)
 847
 848     (J4NN jump "jump I4 non-negative" 41
 849           "Jump if the content of rI4 is non-negative.
 850 Register J is set to the value of the next instruction that would have
 851 been executed when there was no jump."
 852           1)
 853
 854     (J4NZ jump "jump I4 non-zero" 41
 855           "Jump if the content of rI4 is non-zero.
 856 Register J is set to the value of the next instruction that would have
 857 been executed when there was no jump."
 858           1)
 859
 860     (J4NP jump "jump I4 non-positive" 41
 861           "Jump if the content of rI4 is non-positive.
 862 Register J is set to the value of the next instruction that would have
 863 been executed when there was no jump."
 864           1)
 865
 866     (J5N jump "jump I5 negative" 41
 867          "Jump if the content of rI5 is negative.
 868 Register J is set to the value of the next instruction that would have
 869 been executed when there was no jump."
 870          1)
 871
 872     (J5Z jump "jump I5 zero" 41
 873          "Jump if the content of rI5 is zero.
 874 Register J is set to the value of the next instruction that would have
 875 been executed when there was no jump."
 876          1)
 877
 878     (J5P jump "jump I5 positive" 41
 879          "Jump if the content of rI5 is positive.
 880 Register J is set to the value of the next instruction that would have
 881 been executed when there was no jump."
 882          1)
 883
 884     (J5NN jump "jump I5 non-negative" 41
 885           "Jump if the content of rI5 is non-negative.
 886 Register J is set to the value of the next instruction that would have
 887 been executed when there was no jump."
 888           1)
 889
 890     (J5NZ jump "jump I5 non-zero" 41
 891           "Jump if the content of rI5 is non-zero.
 892 Register J is set to the value of the next instruction that would have
 893 been executed when there was no jump."
 894           1)
 895
 896     (J5NP jump "jump I5 non-positive" 41
 897           "Jump if the content of rI5 is non-positive.
 898 Register J is set to the value of the next instruction that would have
 899 been executed when there was no jump."
 900           1)
 901
 902     (J6N jump "jump I6 negative" 41
 903          "Jump if the content of rI6 is negative.
 904 Register J is set to the value of the next instruction that would have
 905 been executed when there was no jump."
 906          1)
 907
 908     (J6Z jump "jump I6 zero" 41
 909          "Jump if the content of rI6 is zero.
 910 Register J is set to the value of the next instruction that would have
 911 been executed when there was no jump."
 912          1)
 913
 914     (J6P jump "jump I6 positive" 41
 915          "Jump if the content of rI6 is positive.
 916 Register J is set to the value of the next instruction that would have
 917 been executed when there was no jump."
 918          1)
 919
 920     (J6NN jump "jump I6 non-negative" 41
 921           "Jump if the content of rI6 is non-negative.
 922 Register J is set to the value of the next instruction that would have
 923 been executed when there was no jump."
 924           1)
 925
 926     (J6NZ jump "jump I6 non-zero" 41
 927           "Jump if the content of rI6 is non-zero.
 928 Register J is set to the value of the next instruction that would have
 929 been executed when there was no jump."
 930           1)
 931
 932     (J6NP jump "jump I6 non-positive" 41
 933           "Jump if the content of rI6 is non-positive.
 934 Register J is set to the value of the next instruction that would have
 935 been executed when there was no jump."
 936           1)
 937
 938     (SLA miscellaneous "shift left A" 6
 939          "Shift to A, M bytes left.
 940 Hero's will be added to the right."
 941          2)
 942
 943     (SRA miscellaneous "shift right A" 6
 944          "Shift to A, M bytes right.
 945 Zeros will be added to the left."
 946          2)
 947
 948     (SLAX miscellaneous "shift left AX" 6
 949           "Shift AX, M bytes left.
 950 Zeros will be added to the right."
 951           2)
 952
 953
 954     (SRAX miscellaneous "shift right AX" 6
 955           "Shift AX, M bytes right.
 956 Zeros will be added to the left."
 957           2)
 958
 959     (SLC miscellaneous "shift left AX circularly" 6
 960          "Shift AX, M bytes left circularly.
 961 The bytes that fall off to the left will be added to the right."
 962          2)
 963
 964     (SRC miscellaneous "shift right AX circularly" 6
 965          "Shift AX, M bytes right circularly.
 966 The bytes that fall off to the right will be added to the left."
 967          2)
 968
 969     (MOVE miscellaneous "move" 7 number
 970           "Move MOD words from M to the location stored in rI1."
 971           (+ 1 (* 2 number)))
 972
 973     (NOP miscellaneous "no operation" 0 ignored
 974          "No operation, M and F are not used by the machine."
 975          1)
 976
 977     (HLT miscellaneous "halt" 5
 978          "Halt.
 979 Stop instruction fetching."
 980          1)
 981
 982     (IN input-output "input" 36 unit
 983         "Transfer a block of words from the specified unit to memory.
 984 The transfer starts at address M."
 985         1)
 986
 987     (OUT input-output "output" 37 unit
 988          "Transfer a block of words from memory.
 989 The transfer starts at address M to the specified unit."
 990          1)
 991
 992     (IOC input-output "input-output control" 35 unit
 993          "Perform a control operation.
 994 The control operation is given by M on the specified unit."
 995          1)
 996
 997     (JRED input-output "jump ready" 38 unit
 998           "Jump to M if the specified unit is ready."
 999           1)
1000
1001     (JBUS input-output "jump busy" 34 unit
1002           "Jump to M if the specified unit is busy."
1003           1)
1004
1005     (NUM conversion "convert to numeric" 5
1006          "Convert rAX to its numerical value and store it in rA.
1007 the register rAX is assumed to contain a character representation of
1008 a number."
1009          10)
1010
1011     (CHAR conversion "convert to characters" 5
1012           "Convert the number stored in rA to a character representation.
1013 The converted character representation is stored in rAX."
1014           10))
1015
1016   "Alist that contains all the possible operation codes for mix.
1017 Each elt has the form
1018   (OP-CODE GROUP FULL-NAME C-BYTE F-BYTE DESCRIPTION EXECUTION-TIME)
1019 Where OP-CODE is the text of the opcode as a symbol,
1020 FULL-NAME is the human readable name as a string,
1021 C-BYTE is the operation code telling what operation is to be performed,
1022 F-BYTE holds a modification of the operation code which can be a symbol
1023   or a number,
1024 DESCRIPTION contains an string with a description about the operation code and
1025 EXECUTION-TIME holds info about the time it takes, number or string.")
1026 ;; (makunbound 'mixal-operation-codes-alist)
1027
1028
1029 ;;; Font-locking:
1030 (defconst mixal-syntax-propertize-function
1031   (syntax-propertize-rules
1032    ;; Normal comments start with a * in column 0 and end at end of line.
1033    ("^\\*" (0 "<"))
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 "<"))))
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 completion can use it
1062            (table (mapcar (lambda (elm) (cons (symbol-name (car elm)) nil))
1063                           mixal-operation-codes-alist))
1064            ;; prompt is different depending on we are close to a valid op-code
1065            (have-default (assq (intern-soft (current-word))
1066                                mixal-operation-codes-alist))
1067            (prompt (concat "Describe operation code "
1068                            (if have-default
1069                                (concat "(default " (current-word) "): ")
1070                              ": "))))
1071       ;; As the operation code to the user.
1072       (completing-read prompt table nil t nil
1073                        'mixal-describe-operation-code-history
1074                        (current-word)))))
1075   ;; get the info on the op-code and output it to the help buffer
1076   (let ((op-code-help (assq (intern-soft op-code) mixal-operation-codes-alist)))
1077     (when op-code-help
1078       (with-output-to-temp-buffer (buffer-name (get-buffer-create "*Help*"))
1079         (princ op-code) (princ " is an mix operation code\n\n")
1080         (princ (nth 5 op-code-help)) (terpri) (terpri)
1081         (princ "      group: ") (princ (nth 1 op-code-help)) (terpri)
1082         (princ "  nice name: ") (princ (nth 2 op-code-help)) (terpri)
1083         (princ " OPCODE / C: ") (princ (nth 3 op-code-help)) (terpri)
1084         (princ "    MOD / F: ") (princ (nth 4 op-code-help)) (terpri)
1085         (princ "       time: ") (princ (nth 6 op-code-help)) (terpri)))))
1086
1087 ;;;; Running
1088 (defun mixal-run ()
1089   "Run mixal file in current buffer, assumes that file has been compiled."
1090   (interactive)
1091   (if (fboundp 'mixvm)
1092       (mixvm (concat "mixvm -r -t -d "
1093                      (file-name-sans-extension (buffer-file-name))))
1094     (error "mixvm.el needs to be loaded to run `mixvm'")))
1095
1096 (defun mixal-debug ()
1097   "Start mixvm for debugging.
1098 Assumes that file has been compiled with debugging support."
1099   (interactive)
1100   (if (fboundp 'mixvm)
1101       (mixvm (concat "mixvm "
1102                      (file-name-sans-extension (buffer-file-name))))
1103     (error "mixvm.el needs to be loaded to run `mixvm'")))
1104
1105 ;;;###autoload
1106 (define-derived-mode mixal-mode prog-mode "mixal"
1107   "Major mode for the mixal asm language."
1108   (set (make-local-variable 'comment-start) "*")
1109   (set (make-local-variable 'comment-start-skip) "^\\*[ \t]*")
1110   (set (make-local-variable 'font-lock-defaults)
1111        `(mixal-font-lock-keywords))
1112   (set (make-local-variable 'syntax-propertize-function)
1113        mixal-syntax-propertize-function)
1114   ;; might add an indent function in the future
1115   ;;  (set (make-local-variable 'indent-line-function) 'mixal-indent-line)
1116   (set (make-local-variable 'compile-command)
1117        (concat "mixasm "
1118                (if buffer-file-name
1119                    (shell-quote-argument buffer-file-name)))))
1120
1121 (provide 'mixal-mode)
1122
1123 ;;; mixal-mode.el ends here