Annotation of gforth/cross.fs, revision 1.2
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
1.2 ! pazsan 415: ghost unloop ghost ;S 2drop
1.1 anton 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:
1.2 ! pazsan 484: Cond: EXIT ( -- ) restrict? compile ;S ;Cond
! 485:
1.1 anton 486: Cond: ; ( -- ) restrict?
487: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
488: ELSE true ABORT" CROSS: Stack empty" THEN
1.2 ! pazsan 489: compile ;S state off
1.1 anton 490: ;Resolve @
491: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
492: ;Cond
493: Cond: [ restrict? state off ;Cond
494:
495: >CROSS
496: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
497:
498: >TARGET
499: Cond: DOES> restrict?
500: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
501: ;Cond
502: : DOES> dodoes, T here H !does depth T ] H ;
503:
504: >CROSS
505: \ Creation 01nov92py
506:
507: \ Builder 11may93jaw
508:
509: : Builder ( Create do: "name" -- )
510: >in @ alias2 swap dup >in ! >r >r
511: Make-Ghost rot swap >exec ! ,
512: r> r> >in !
513: also ghosts ' previous swap !
514: DOES> dup >exec @ execute ;
515:
516: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
517: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
518: :dodoes T A, H gexecute ;
519:
520: : TCreate ( ghost -- )
521: CreateFlag on
522: Theader dup gdoes,
523: >end @ >exec @ execute ;
524:
525: : Build: ( -- [xt] [colon-sys] )
526: :noname postpone TCreate ;
527:
528: : gdoes> ( ghost -- addr flag )
529: state @ IF gexecute true EXIT THEN
530: cell+ @ T >body H false ;
531:
532: \ DO: ;DO 11may93jaw
533: \ changed to ?EXIT 10may93jaw
534:
535: : (does>) postpone does> ; immediate \ second level does>
536:
537: : DO: ( -- addr [xt] [colon-sys] )
538: here ghostheader
539: :noname
540: postpone (does>) postpone gdoes> postpone ?EXIT ;
541:
542: : ;DO ( addr [xt] [colon-sys] -- )
543: postpone ; ( S addr xt )
544: over >exec ! ; immediate
545:
546: : by ( -- addr ) \ Name
547: ghost >end @ ;
548:
549: >TARGET
550: \ Variables and Constants 05dec92py
551:
552: Build: ;
553: DO: ( ghost -- addr ) ;DO
554: Builder Create
555: by Create :dovar resolve
556:
557: Build: T 0 , H ;
558: by Create
559: Builder Variable
560:
561: Build: T 0 A, H ;
562: by Create
563: Builder AVariable
564:
565: Build: T 0 , H ;
566: by Create
567: Builder User
568:
569: Build: T 0 , 0 , H ;
570: by Create
571: Builder 2User
572:
573: Build: T 0 A, H ;
574: by Create
575: Builder AUser
576:
577: Build: ( n -- ) T , H ;
578: DO: ( ghost -- n ) T @ H ;DO
579: Builder Constant
580: by Constant :docon resolve
581:
582: Build: ( n -- ) T A, H ;
583: by Constant
584: Builder AConstant
585:
586: Build: T 0 , H ;
587: by Constant
588: Builder Value
589:
590: Build: ( -- ) compile noop ;
591: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
592: Builder Defer
593:
594: \ structural conditionals 17dec92py
595:
596: >CROSS
597: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
598: : sys? ( sys -- sys ) dup 0= ?struc ;
599: : >mark ( -- sys ) T here 0 , H ;
600: : >resolve ( sys -- ) T here over - swap ! H ;
601: : <resolve ( sys -- ) T here - , H ;
602: >TARGET
603:
604: \ Structural Conditionals 12dec92py
605:
606: Cond: BUT restrict? sys? swap ;Cond
607: Cond: YET restrict? sys? dup ;Cond
608:
609: >CROSS
610: Variable tleavings
611: >TARGET
612:
613: Cond: DONE ( addr -- ) restrict? tleavings @
614: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
615: tleavings ! drop ;Cond
616:
617: >CROSS
618: : (leave T here H tleavings @ T , H tleavings ! ;
619: >TARGET
620:
621: Cond: LEAVE restrict? compile branch (leave ;Cond
622: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
623:
624: \ Structural Conditionals 12dec92py
625:
626: Cond: AHEAD restrict? compile branch >mark ;Cond
627: Cond: IF restrict? compile ?branch >mark ;Cond
628: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
629: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
630:
631: Cond: BEGIN restrict? T here H ;Cond
632: Cond: WHILE restrict? sys? compile IF swap ;Cond
633: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
634: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
635: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
636:
637: \ Structural Conditionals 12dec92py
638:
639: Cond: DO restrict? compile (do) T here H ;Cond
640: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
641: Cond: FOR restrict? compile (for) T here H ;Cond
642:
643: >CROSS
644: : loop] dup <resolve cell - compile DONE compile unloop ;
645: >TARGET
646:
647: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
648: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
649: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
650:
651: \ String words 23feb93py
652:
653: : ," [char] " parse string, T align H ;
654:
655: Cond: ." restrict? compile (.") T ," H ;Cond
656: Cond: S" restrict? compile (S") T ," H ;Cond
657: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
658:
659: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
660: : IS T ' >body ! H ;
661:
662: \ LINKED ERR" ENV" 2ENV" 18may93jaw
663:
664: \ linked list primitive
665: : linked T here over @ A, swap ! H ;
666:
667: : err" s" ErrLink linked" evaluate T , H
668: [char] " parse string, T align H ;
669:
670: : env" [char] " parse s" EnvLink linked" evaluate
671: string, T align , H ;
672:
673: : 2env" [char] " parse s" EnvLink linked" evaluate
674: here >r string, T align , , H
675: r> dup T c@ H 80 and swap T c! H ;
676:
677: \ compile must be last 22feb93py
678:
679: Cond: compile ( -- ) restrict? \ name
680: name gfind dup 0= ABORT" CROSS: Can't compile"
681: 0> IF gexecute
682: ELSE dup >magic @ <imm> =
683: IF gexecute
684: ELSE compile (compile) gexecute THEN THEN ;Cond
685:
686: Cond: postpone ( -- ) restrict? \ name
687: name gfind dup 0= ABORT" CROSS: Can't compile"
688: 0> IF gexecute
689: ELSE dup >magic @ <imm> =
690: IF gexecute
691: ELSE compile (compile) gexecute THEN THEN ;Cond
692:
693: >MINIMAL
694: also minimal
695: \ Usefull words 13feb93py
696:
697: : KB 400 * ;
698:
699: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
700:
701: : there? name gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
702:
703: : [IFDEF] there? postpone [IF] ;
704: : [IFUNDEF] there? 0= postpone [IF] ;
705:
706: \ C: \- \+ Conditional Compiling 09jun93jaw
707:
708: : C: >in @ there? 0=
709: IF >in ! T : H
710: ELSE drop
711: BEGIN bl word dup c@
712: IF count comment? s" ;" compare 0= ?EXIT
713: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
714: THEN
715: AGAIN
716: THEN ;
717:
718: also minimal
719:
720: : \- there? IF postpone \ THEN ;
721: : \+ there? 0= IF postpone \ THEN ;
722:
723: : [IF] postpone [IF] ;
724: : [THEN] postpone [THEN] ;
725: : [ELSE] postpone [ELSE] ;
726:
727: Cond: [IF] [IF] ;Cond
728: Cond: [IFDEF] [IFDEF] ;Cond
729: Cond: [IFUNDEF] [IFUNDEF] ;Cond
730: Cond: [THEN] [THEN] ;Cond
731: Cond: [ELSE] [ELSE] ;Cond
732:
733: \ save-cross 17mar93py
734:
735: \ i'm not interested in bigforth features this time 10may93jaw
736: \ [IFDEF] file
737: \ also file
738: \ [THEN]
739: \ included throw after create-file 11may93jaw
740:
741: endian Constant endian
742:
743: : save-cross ( "name" -- )
744: bl parse ." Saving to " 2dup type
745: w/o bin create-file throw >r
746: image @ there r@ write-file throw
747: bit$ @ there 1- cell>bit rshift 1+ r@ write-file throw
748: r> close-file throw ;
749:
750: \ words that should be in minimal
751:
752: : + + ; : 1- 1- ;
753: : - - ; : 2* 2* ;
754: : dup dup ; : over over ;
755: : swap swap ; : rot rot ;
756:
757: \ include bug5.fs
758: \ only forth also minimal definitions
759:
760: : \ postpone \ ;
761: : ( postpone ( ;
762: : include bl word count included ;
763: : .( [char] ) parse type ;
764: : cr cr ;
765:
766: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
767: only forth also minimal definitions
768:
769: \ cross-compiler words
770:
771: : decimal decimal ;
772: : hex hex ;
773:
774:
775: \ for debugging...
776: : order order ;
777: : words words ;
778: : .s .s ;
779:
780: : bye bye ;
781:
782: \ turnkey direction
783: : H forth ; immediate
784: : T minimal ; immediate
785: : G ghosts ; immediate
786:
787: : turnkey 0 set-order also Target definitions
788: also Minimal also ;
789:
790: \ these ones are pefered:
791:
792: : lock turnkey ;
793: : unlock forth also cross ;
794:
795: unlock definitions also minimal
796: : lock lock ;
797: lock
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