Annotation of gforth/cross.fs, revision 1.1
1.1 ! anton 1: \ CROSS.FS The Cross-Compiler 06oct92py
! 2: \ $Id: cross.fs,v 1.6 1993/11/08 18:10:48 pazsan Exp $
! 3: \ Idea and implementation: Bernd Paysan (py)
! 4: \ Copyright 1992 by the ANSI figForth Development Group
! 5:
! 6: \ Log:
! 7: \ changed in ; [ to state off 12may93jaw
! 8: \ included place +place 12may93jaw
! 9: \ for a created word (variable, constant...)
! 10: \ is now an alias in the target voabulary.
! 11: \ this means it is no longer necessary to
! 12: \ switch between vocabularies for variable
! 13: \ initialization 12may93jaw
! 14: \ discovered error in DOES>
! 15: \ replaced !does with (;code) 16may93jaw
! 16: \ made complete redesign and
! 17: \ introduced two vocs method
! 18: \ to be asure that the right words
! 19: \ are found 08jun93jaw
! 20: \ btw: ! works not with 16 bit
! 21: \ targets 09jun93jaw
! 22: \ added: 2user and value 11jun93jaw
! 23:
! 24: include other.fs \ ansforth extentions for cross
! 25:
! 26: decimal
! 27:
! 28: \ number? 11may93jaw
! 29:
! 30: \ checks for +, -, $, & ...
! 31: : leading? ( c-addr u -- c-addr u doubleflag negflag base )
! 32: 2dup 1- chars + c@ [char] . = \ process double
! 33: IF dup 1 chars = IF over 1 swap c! false ELSE 1 chars - true THEN
! 34: \ only if more than only . ( may be number output! )
! 35: \ if only . => store garbage
! 36: ELSE false THEN >r \ numbers
! 37: false -rot base @ -rot
! 38: BEGIN over c@
! 39: dup [char] - =
! 40: IF drop >r >r >r
! 41: drop true r> r> r> 0 THEN
! 42: dup [char] + =
! 43: IF drop 0 THEN
! 44: dup [char] $ =
! 45: IF drop >r >r drop 16 r> r> 0 THEN
! 46: dup [char] & =
! 47: IF drop >r >r drop 10 r> r> 0 THEN
! 48: 0= IF 1 chars - swap char+ swap false ELSE true THEN
! 49: over 0= or
! 50: UNTIL
! 51: rot >r rot r> r> -rot ;
! 52:
! 53: : number? ( c-addr -- n/d flag )
! 54: \ return -1 if cell 1 if double 0 if garbage
! 55: 0 swap 0 swap \ create double number
! 56: count leading?
! 57: base @ >r base !
! 58: >r >r
! 59: >number IF 2drop false r> r> 2drop
! 60: r> base ! EXIT THEN
! 61: drop r> r>
! 62: IF IF dnegate 1
! 63: ELSE drop negate -1 THEN
! 64: ELSE IF 1 ELSE drop -1 THEN
! 65: THEN r> base ! ;
! 66:
! 67:
! 68:
! 69: \ Begin CROSS COMPILER:
! 70:
! 71: \ GhostNames 9may93jaw
! 72: \ second name source to search trough list
! 73:
! 74: VARIABLE GhostNames
! 75: 0 GhostNames !
! 76: : GhostName ( -- addr )
! 77: here GhostNames @ , GhostNames ! here 0 ,
! 78: name count
! 79: \ 2dup type space
! 80: dup c, here over chars allot swap move align ;
! 81:
! 82: hex
! 83:
! 84:
! 85: Vocabulary Cross
! 86: Vocabulary Target
! 87: Vocabulary Ghosts
! 88: VOCABULARY Minimal
! 89: only Forth also Target also also
! 90: definitions Forth
! 91:
! 92: : T previous Cross also Target ; immediate
! 93: : G Ghosts ; immediate
! 94: : H previous Forth also Cross ; immediate
! 95:
! 96: forth definitions
! 97:
! 98: : T previous Cross also Target ; immediate
! 99: : G Ghosts ; immediate
! 100:
! 101: : >cross also Cross definitions previous ;
! 102: : >target also Target definitions previous ;
! 103: : >minimal also Minimal definitions previous ;
! 104:
! 105: H
! 106:
! 107: >CROSS
! 108:
! 109: \ Variables 06oct92py
! 110:
! 111: -1 Constant NIL
! 112: Variable image
! 113: Variable tlast NIL tlast ! \ Last name field
! 114: Variable tlastcfa \ Last code field
! 115: Variable tdoes \ Resolve does> calls
! 116: Variable bit$
! 117: Variable tdp
! 118: : there tdp @ ;
! 119:
! 120: \ Constants 06apr93py
! 121:
! 122: -2 Constant :docol
! 123: -3 Constant :docon
! 124: -4 Constant :dovar
! 125: -5 Constant :dodoes
! 126:
! 127: \ Parameter for target systems 06oct92py
! 128:
! 129: include machine.fs
! 130:
! 131: >TARGET
! 132:
! 133: \ Byte ordering and cell size 06oct92py
! 134:
! 135: : cell+ cell + ;
! 136: : cells cell<< lshift ;
! 137: : chars ;
! 138:
! 139: >CROSS
! 140: : cell/ cell<< rshift ;
! 141: >TARGET
! 142: 20 CONSTANT bl
! 143: -1 Constant NIL
! 144: -2 Constant :docol
! 145: -3 Constant :docon
! 146: -4 Constant :dovar
! 147: -5 Constant :dodoes
! 148:
! 149: >CROSS
! 150:
! 151: endian 0 pad ! -1 pad c! pad @ 0<
! 152: = [IF] : bswap ; immediate
! 153: [ELSE] : bswap ( big / little -- little / big ) 0
! 154: cell 1- FOR bits/byte lshift over
! 155: [ 1 bits/byte lshift 1- ] Literal and or
! 156: swap bits/byte rshift swap NEXT nip ;
! 157: [THEN]
! 158:
! 159: \ Memory initialisation 05dec92py
! 160: \ Fixed bug in else part 11may93jaw
! 161:
! 162: [IFDEF] Memory \ Memory is a bigFORTH feature
! 163: Memory
! 164: : initmem ( var len -- )
! 165: 2dup swap handle! >r @ r> erase ;
! 166: Target
! 167: [ELSE]
! 168: : initmem ( var len -- )
! 169: tuck allocate abort" CROSS: No memory for target"
! 170: ( len var adr ) dup rot !
! 171: ( len adr ) swap erase ;
! 172: [THEN]
! 173:
! 174: \ MakeKernal 12dec92py
! 175:
! 176: >MINIMAL
! 177: : makekernal ( targetsize -- targetsize )
! 178: bit$ over 1- cell>bit rshift 1+ initmem
! 179: image over initmem tdp off ;
! 180:
! 181: >CROSS
! 182: \ Bit string manipulation 06oct92py
! 183: \ 9may93jaw
! 184: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
! 185: : bits ( n -- n ) chars Bittable + c@ ;
! 186:
! 187: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
! 188: : +bit ( addr n -- ) >bit over c@ or swap c! ;
! 189: : relon ( taddr -- ) bit$ @ swap cell/ +bit ;
! 190:
! 191: \ Target memory access 06oct92py
! 192:
! 193: : align+ ( taddr -- rest )
! 194: cell tuck 1- and - [ cell 1- ] Literal and ;
! 195:
! 196: >TARGET
! 197: : aligned ( taddr -- ta-addr ) dup align+ + ;
! 198: \ assumes cell alignment granularity (as GNU C)
! 199:
! 200: >CROSS
! 201: : >image ( taddr -- absaddr ) image @ + ;
! 202: >TARGET
! 203: : @ ( taddr -- w ) >image @ bswap ;
! 204: : ! ( w taddr -- ) >r bswap r> >image ! ;
! 205: : c@ ( taddr -- char ) >image c@ ;
! 206: : c! ( char taddr -- ) >image c! ;
! 207:
! 208: \ Target compilation primitives 06oct92py
! 209: \ included A! 16may93jaw
! 210:
! 211: : here ( -- there ) there ;
! 212: : allot ( n -- ) tdp +! ;
! 213: : , ( w -- ) T here H cell T allot ! H ;
! 214: : c, ( char -- ) T here 1 allot c! H ;
! 215: : align ( -- ) T here H align+ 0 ?DO bl T c, H LOOP ;
! 216:
! 217: : A! dup relon T ! H ;
! 218: : A, ( w -- ) T here H relon T , H ;
! 219:
! 220: >CROSS
! 221:
! 222: \ threading modell 13dec92py
! 223:
! 224: \ generic threading modell
! 225: : docol, ( -- ) :docol T A, 0 , H ;
! 226:
! 227: >TARGET
! 228: : >body ( cfa -- pfa ) T cell+ cell+ H ;
! 229: >CROSS
! 230:
! 231: : dodoes, ( -- ) T 0 , 0 , H ;
! 232:
! 233: \ Ghost Builder 06oct92py
! 234:
! 235: \ <T T> new version with temp variable 10may93jaw
! 236:
! 237: VARIABLE VocTemp
! 238:
! 239: : <T get-current VocTemp ! also Ghosts definitions ;
! 240: : T> previous VocTemp @ set-current ;
! 241:
! 242: 4711 Constant <fwd> 4712 Constant <res>
! 243: 4713 Constant <imm>
! 244:
! 245: \ iForth makes only immediate directly after create
! 246: \ make atonce trick! ?
! 247:
! 248: Variable atonce atonce off
! 249:
! 250: : NoExec true ABORT" CROSS: Don't execute ghost" ;
! 251:
! 252: : GhostHeader <fwd> , 0 , ['] NoExec , ;
! 253:
! 254: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
! 255: : >end 3 cells + ;
! 256:
! 257: : Make-Ghost ( "name" -- ghost )
! 258: >in @ GhostName swap >in !
! 259: <T Create atonce @ IF immediate atonce off THEN
! 260: here tuck swap ! ghostheader T>
! 261: DOES> >exec @ execute ;
! 262:
! 263: \ ghost words 14oct92py
! 264: \ changed: 10may93py/jaw
! 265:
! 266: : gfind ( string -- ghost true/1 / string false )
! 267: \ searches for string in word-list ghosts
! 268: \ !! wouldn't it be simpler to just use search-wordlist ? ae
! 269: >r get-order 0 set-order also ghosts r> find >r >r
! 270: set-order r> r@ IF >body THEN r> ;
! 271:
! 272: VARIABLE Already
! 273:
! 274: : ghost ( "name" -- ghost )
! 275: Already off
! 276: >in @ name gfind IF Already on nip EXIT THEN
! 277: drop >in ! Make-Ghost ;
! 278:
! 279: \ resolve 14oct92py
! 280:
! 281: : resolve-loop ( ghost tcfa -- ghost tcfa )
! 282: >r dup >link @
! 283: BEGIN dup WHILE dup T @ H r@ rot T ! H REPEAT drop r> ;
! 284:
! 285: \ exists 9may93jaw
! 286:
! 287: : exists ( ghost tcfa -- )
! 288: over GhostNames
! 289: BEGIN @ dup
! 290: WHILE 2dup cell+ @ =
! 291: UNTIL
! 292: nip 2 cells + count cr ." CROSS: Exists: " type 4 spaces
! 293: swap cell+ !
! 294: ELSE true ABORT" CROSS: Ghostnames inconsistent"
! 295: THEN ;
! 296:
! 297: : resolve ( ghost tcfa -- )
! 298: over >magic @ <fwd> <> IF exists EXIT THEN
! 299: resolve-loop over >link ! <res> swap >magic ! ;
! 300:
! 301: \ gexecute ghost, 01nov92py
! 302:
! 303: : do-forward ( ghost -- )
! 304: >link dup @ there rot ! T A, H ;
! 305: : do-resolve ( ghost -- )
! 306: >link @ T A, H ;
! 307:
! 308: : gexecute ( ghost -- ) dup @
! 309: <fwd> = IF do-forward ELSE do-resolve THEN ;
! 310: : ghost, ghost gexecute ;
! 311:
! 312: \ .unresolved 11may93jaw
! 313:
! 314: variable ResolveFlag
! 315:
! 316: \ ?touched 11may93jaw
! 317:
! 318: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
! 319: 0 <> and ;
! 320:
! 321: : ?resolved ( ghostname -- )
! 322: dup cell+ @ ?touched
! 323: IF cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
! 324:
! 325: >MINIMAL
! 326: : .unresolved ( -- )
! 327: ResolveFlag off cr ." Unresolved: "
! 328: Ghostnames
! 329: BEGIN @ dup
! 330: WHILE dup ?resolved
! 331: REPEAT drop ResolveFlag @ 0= IF ." Nothing!" THEN cr ;
! 332:
! 333: >CROSS
! 334: \ Header states 12dec92py
! 335:
! 336: : flag! ( 8b -- ) tlast @ dup >r T c@ xor r> c! H ;
! 337:
! 338: VARIABLE ^imm
! 339:
! 340: >TARGET
! 341: : immediate 20 flag!
! 342: ^imm @ @ dup <imm> = ?EXIT
! 343: <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
! 344: <imm> ^imm @ ! ;
! 345: : restrict ;
! 346: >CROSS
! 347:
! 348: \ ALIAS2 ansforth conform alias 9may93jaw
! 349:
! 350: : ALIAS2 create here 0 , DOES> @ execute ;
! 351: \ usage:
! 352: \ ' alias2 bla !
! 353:
! 354: \ Target Header Creation 01nov92py
! 355:
! 356: : string, ( addr count -- )
! 357: dup T c, H bounds DO I c@ T c, H LOOP ;
! 358: : name, ( "name" -- ) name count string, T align H ;
! 359: : view, ( -- ) ( dummy ) ;
! 360:
! 361: VARIABLE CreateFlag CreateFlag off
! 362:
! 363: : (Theader ( "name" -- ghost ) T align H view,
! 364: tlast @ dup 0> IF T 1 cells - THEN A, H there tlast !
! 365: >in @ name, >in ! T here H tlastcfa !
! 366: CreateFlag @ IF
! 367: >in @ alias2 swap >in ! \ create alias in target
! 368: >in @ ghost swap >in !
! 369: swap also ghosts ' previous swap ! \ tick ghost and store in alias
! 370: CreateFlag off
! 371: ELSE ghost THEN
! 372: dup >magic ^imm ! \ a pointer for immediate
! 373: Already @ IF dup >end tdoes !
! 374: ELSE 0 tdoes ! THEN
! 375: 80 flag! ;
! 376:
! 377: VARIABLE ;Resolve 1 cells allot
! 378:
! 379: : Theader ( "name" -- ) (THeader there resolve 0 ;Resolve ! ;
! 380:
! 381: >TARGET
! 382: : Alias ( cfa -- ) \ name
! 383: (THeader over resolve T A, H 80 flag! ;
! 384: >CROSS
! 385:
! 386: \ Conditionals and Comments 11may93jaw
! 387:
! 388: : ;Cond
! 389: postpone ;
! 390: swap ! ; immediate
! 391:
! 392: : Cond: ( -- ) \ name {code } ;
! 393: atonce on
! 394: ghost
! 395: >exec
! 396: :NONAME ;
! 397:
! 398: : restrict? ( -- )
! 399: \ aborts on interprete state - ae
! 400: state @ 0= ABORT" CROSS: Restricted" ;
! 401:
! 402: : Comment ( -- )
! 403: >in @ atonce on ghost swap >in ! ' swap >exec ! ;
! 404:
! 405: Comment ( Comment \
! 406:
! 407: \ Predefined ghosts 12dec92py
! 408:
! 409: ghost 0= drop
! 410: ghost branch ghost ?branch 2drop
! 411: ghost (do) ghost (?do) 2drop
! 412: ghost (for) drop
! 413: ghost (loop) ghost (+loop) 2drop
! 414: ghost (next) drop
! 415: ghost unloop ghost EXIT 2drop
! 416: ghost lit ghost (compile) ghost ! 2drop drop
! 417: ghost (;code) ghost noop 2drop
! 418: ghost (.") ghost (S") ghost (ABORT") 2drop drop
! 419:
! 420: \ compile 10may93jaw
! 421:
! 422: : compile ( -- ) \ name
! 423: restrict?
! 424: name gfind dup 0= ABORT" CROSS: Can't compile "
! 425: 0> ( immediate? )
! 426: IF >exec @ compile,
! 427: ELSE postpone literal postpone gexecute THEN ;
! 428: immediate
! 429:
! 430: >TARGET
! 431: : ' ( -- cfa ) name gfind 0= ABORT" CROSS: undefined "
! 432: dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
! 433:
! 434: Cond: ['] compile lit ghost gexecute ;Cond
! 435:
! 436: >CROSS
! 437: \ tLiteral 12dec92py
! 438:
! 439: : lit, ( n -- ) compile lit T , H ;
! 440: : alit, ( n -- ) compile lit T A, H ;
! 441:
! 442: >TARGET
! 443: Cond: Literal ( n -- ) restrict? lit, ;Cond
! 444: Cond: ALiteral ( n -- ) restrict? alit, ;Cond
! 445:
! 446: : Char ( "<char>" -- ) bl word char+ c@ ;
! 447: Cond: [Char] ( "<char>" -- ) restrict? Char lit, ;Cond
! 448:
! 449: >CROSS
! 450: \ Target compiling loop 12dec92py
! 451: \ ">tib trick thrown out 10may93jaw
! 452: \ number? defined at the top 11may93jaw
! 453:
! 454: \ compiled word might leave items on stack!
! 455: : tcom ( in name -- )
! 456: gfind ?dup IF 0> IF nip >exec @ execute
! 457: ELSE nip gexecute THEN EXIT THEN
! 458: number? dup IF 0> IF swap lit, THEN lit, drop
! 459: ELSE 2drop >in !
! 460: ghost gexecute THEN ;
! 461:
! 462: >TARGET
! 463: \ : ; DOES> 13dec92py
! 464: \ ] 9may93py/jaw
! 465:
! 466: : ] state on
! 467: BEGIN
! 468: BEGIN >in @ name
! 469: dup c@ 0= WHILE 2drop refill 0=
! 470: ABORT" CROSS: End of file while target compiling"
! 471: REPEAT
! 472: tcom
! 473: state @
! 474: 0=
! 475: UNTIL ;
! 476:
! 477: \ by the way: defining a second interpreter (a compiler-)loop
! 478: \ is not allowed if a system should be ans conform
! 479:
! 480: : : ( -- colon-sys ) \ Name
! 481: (THeader ;Resolve ! there ;Resolve cell+ !
! 482: docol, depth T ] H ;
! 483:
! 484: Cond: ; ( -- ) restrict?
! 485: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
! 486: ELSE true ABORT" CROSS: Stack empty" THEN
! 487: compile EXIT state off
! 488: ;Resolve @
! 489: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
! 490: ;Cond
! 491: Cond: [ restrict? state off ;Cond
! 492:
! 493: >CROSS
! 494: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
! 495:
! 496: >TARGET
! 497: Cond: DOES> restrict?
! 498: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
! 499: ;Cond
! 500: : DOES> dodoes, T here H !does depth T ] H ;
! 501:
! 502: >CROSS
! 503: \ Creation 01nov92py
! 504:
! 505: \ Builder 11may93jaw
! 506:
! 507: : Builder ( Create do: "name" -- )
! 508: >in @ alias2 swap dup >in ! >r >r
! 509: Make-Ghost rot swap >exec ! ,
! 510: r> r> >in !
! 511: also ghosts ' previous swap !
! 512: DOES> dup >exec @ execute ;
! 513:
! 514: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
! 515: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
! 516: :dodoes T A, H gexecute ;
! 517:
! 518: : TCreate ( ghost -- )
! 519: CreateFlag on
! 520: Theader dup gdoes,
! 521: >end @ >exec @ execute ;
! 522:
! 523: : Build: ( -- [xt] [colon-sys] )
! 524: :noname postpone TCreate ;
! 525:
! 526: : gdoes> ( ghost -- addr flag )
! 527: state @ IF gexecute true EXIT THEN
! 528: cell+ @ T >body H false ;
! 529:
! 530: \ DO: ;DO 11may93jaw
! 531: \ changed to ?EXIT 10may93jaw
! 532:
! 533: : (does>) postpone does> ; immediate \ second level does>
! 534:
! 535: : DO: ( -- addr [xt] [colon-sys] )
! 536: here ghostheader
! 537: :noname
! 538: postpone (does>) postpone gdoes> postpone ?EXIT ;
! 539:
! 540: : ;DO ( addr [xt] [colon-sys] -- )
! 541: postpone ; ( S addr xt )
! 542: over >exec ! ; immediate
! 543:
! 544: : by ( -- addr ) \ Name
! 545: ghost >end @ ;
! 546:
! 547: >TARGET
! 548: \ Variables and Constants 05dec92py
! 549:
! 550: Build: ;
! 551: DO: ( ghost -- addr ) ;DO
! 552: Builder Create
! 553: by Create :dovar resolve
! 554:
! 555: Build: T 0 , H ;
! 556: by Create
! 557: Builder Variable
! 558:
! 559: Build: T 0 A, H ;
! 560: by Create
! 561: Builder AVariable
! 562:
! 563: Build: T 0 , H ;
! 564: by Create
! 565: Builder User
! 566:
! 567: Build: T 0 , 0 , H ;
! 568: by Create
! 569: Builder 2User
! 570:
! 571: Build: T 0 A, H ;
! 572: by Create
! 573: Builder AUser
! 574:
! 575: Build: ( n -- ) T , H ;
! 576: DO: ( ghost -- n ) T @ H ;DO
! 577: Builder Constant
! 578: by Constant :docon resolve
! 579:
! 580: Build: ( n -- ) T A, H ;
! 581: by Constant
! 582: Builder AConstant
! 583:
! 584: Build: T 0 , H ;
! 585: by Constant
! 586: Builder Value
! 587:
! 588: Build: ( -- ) compile noop ;
! 589: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
! 590: Builder Defer
! 591:
! 592: \ structural conditionals 17dec92py
! 593:
! 594: >CROSS
! 595: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
! 596: : sys? ( sys -- sys ) dup 0= ?struc ;
! 597: : >mark ( -- sys ) T here 0 , H ;
! 598: : >resolve ( sys -- ) T here over - swap ! H ;
! 599: : <resolve ( sys -- ) T here - , H ;
! 600: >TARGET
! 601:
! 602: \ Structural Conditionals 12dec92py
! 603:
! 604: Cond: BUT restrict? sys? swap ;Cond
! 605: Cond: YET restrict? sys? dup ;Cond
! 606:
! 607: >CROSS
! 608: Variable tleavings
! 609: >TARGET
! 610:
! 611: Cond: DONE ( addr -- ) restrict? tleavings @
! 612: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
! 613: tleavings ! drop ;Cond
! 614:
! 615: >CROSS
! 616: : (leave T here H tleavings @ T , H tleavings ! ;
! 617: >TARGET
! 618:
! 619: Cond: LEAVE restrict? compile branch (leave ;Cond
! 620: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
! 621:
! 622: \ Structural Conditionals 12dec92py
! 623:
! 624: Cond: AHEAD restrict? compile branch >mark ;Cond
! 625: Cond: IF restrict? compile ?branch >mark ;Cond
! 626: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
! 627: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
! 628:
! 629: Cond: BEGIN restrict? T here H ;Cond
! 630: Cond: WHILE restrict? sys? compile IF swap ;Cond
! 631: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
! 632: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
! 633: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
! 634:
! 635: \ Structural Conditionals 12dec92py
! 636:
! 637: Cond: DO restrict? compile (do) T here H ;Cond
! 638: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
! 639: Cond: FOR restrict? compile (for) T here H ;Cond
! 640:
! 641: >CROSS
! 642: : loop] dup <resolve cell - compile DONE compile unloop ;
! 643: >TARGET
! 644:
! 645: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
! 646: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
! 647: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
! 648:
! 649: \ String words 23feb93py
! 650:
! 651: : ," [char] " parse string, T align H ;
! 652:
! 653: Cond: ." restrict? compile (.") T ," H ;Cond
! 654: Cond: S" restrict? compile (S") T ," H ;Cond
! 655: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
! 656:
! 657: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
! 658: : IS T ' >body ! H ;
! 659:
! 660: \ LINKED ERR" ENV" 2ENV" 18may93jaw
! 661:
! 662: \ linked list primitive
! 663: : linked T here over @ A, swap ! H ;
! 664:
! 665: : err" s" ErrLink linked" evaluate T , H
! 666: [char] " parse string, T align H ;
! 667:
! 668: : env" [char] " parse s" EnvLink linked" evaluate
! 669: string, T align , H ;
! 670:
! 671: : 2env" [char] " parse s" EnvLink linked" evaluate
! 672: here >r string, T align , , H
! 673: r> dup T c@ H 80 and swap T c! H ;
! 674:
! 675: \ compile must be last 22feb93py
! 676:
! 677: Cond: compile ( -- ) restrict? \ name
! 678: name gfind dup 0= ABORT" CROSS: Can't compile"
! 679: 0> IF gexecute
! 680: ELSE dup >magic @ <imm> =
! 681: IF gexecute
! 682: ELSE compile (compile) gexecute THEN THEN ;Cond
! 683:
! 684: Cond: postpone ( -- ) restrict? \ name
! 685: name gfind dup 0= ABORT" CROSS: Can't compile"
! 686: 0> IF gexecute
! 687: ELSE dup >magic @ <imm> =
! 688: IF gexecute
! 689: ELSE compile (compile) gexecute THEN THEN ;Cond
! 690:
! 691: >MINIMAL
! 692: also minimal
! 693: \ Usefull words 13feb93py
! 694:
! 695: : KB 400 * ;
! 696:
! 697: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
! 698:
! 699: : there? name gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
! 700:
! 701: : [IFDEF] there? postpone [IF] ;
! 702: : [IFUNDEF] there? 0= postpone [IF] ;
! 703:
! 704: \ C: \- \+ Conditional Compiling 09jun93jaw
! 705:
! 706: : C: >in @ there? 0=
! 707: IF >in ! T : H
! 708: ELSE drop
! 709: BEGIN bl word dup c@
! 710: IF count comment? s" ;" compare 0= ?EXIT
! 711: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
! 712: THEN
! 713: AGAIN
! 714: THEN ;
! 715:
! 716: also minimal
! 717:
! 718: : \- there? IF postpone \ THEN ;
! 719: : \+ there? 0= IF postpone \ THEN ;
! 720:
! 721: : [IF] postpone [IF] ;
! 722: : [THEN] postpone [THEN] ;
! 723: : [ELSE] postpone [ELSE] ;
! 724:
! 725: Cond: [IF] [IF] ;Cond
! 726: Cond: [IFDEF] [IFDEF] ;Cond
! 727: Cond: [IFUNDEF] [IFUNDEF] ;Cond
! 728: Cond: [THEN] [THEN] ;Cond
! 729: Cond: [ELSE] [ELSE] ;Cond
! 730:
! 731: \ save-cross 17mar93py
! 732:
! 733: \ i'm not interested in bigforth features this time 10may93jaw
! 734: \ [IFDEF] file
! 735: \ also file
! 736: \ [THEN]
! 737: \ included throw after create-file 11may93jaw
! 738:
! 739: endian Constant endian
! 740:
! 741: : save-cross ( "name" -- )
! 742: bl parse ." Saving to " 2dup type
! 743: w/o bin create-file throw >r
! 744: image @ there r@ write-file throw
! 745: bit$ @ there 1- cell>bit rshift 1+ r@ write-file throw
! 746: r> close-file throw ;
! 747:
! 748: \ words that should be in minimal
! 749:
! 750: : + + ; : 1- 1- ;
! 751: : - - ; : 2* 2* ;
! 752: : dup dup ; : over over ;
! 753: : swap swap ; : rot rot ;
! 754:
! 755: \ include bug5.fs
! 756: \ only forth also minimal definitions
! 757:
! 758: : \ postpone \ ;
! 759: : ( postpone ( ;
! 760: : include bl word count included ;
! 761: : .( [char] ) parse type ;
! 762: : cr cr ;
! 763:
! 764: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
! 765: only forth also minimal definitions
! 766:
! 767: \ cross-compiler words
! 768:
! 769: : decimal decimal ;
! 770: : hex hex ;
! 771:
! 772:
! 773: \ for debugging...
! 774: : order order ;
! 775: : words words ;
! 776: : .s .s ;
! 777:
! 778: : bye bye ;
! 779:
! 780: \ turnkey direction
! 781: : H forth ; immediate
! 782: : T minimal ; immediate
! 783: : G ghosts ; immediate
! 784:
! 785: : turnkey 0 set-order also Target definitions
! 786: also Minimal also ;
! 787:
! 788: \ these ones are pefered:
! 789:
! 790: : lock turnkey ;
! 791: : unlock forth also cross ;
! 792:
! 793: unlock definitions also minimal
! 794: : lock lock ;
! 795: lock
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