1: \ CROSS.FS The Cross-Compiler 06oct92py
2: \ $Id: cross.fs,v 1.6 1994/06/17 12:34:58 anton 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: : comment? ( c-addr u -- c-addr u )
27: 2dup s" (" compare 0=
28: IF postpone (
29: ELSE 2dup s" \" compare 0= IF postpone \ THEN
30: THEN ;
31:
32: decimal
33:
34: \ number? 11may93jaw
35:
36: \ checks for +, -, $, & ...
37: : leading? ( c-addr u -- c-addr u doubleflag negflag base )
38: 2dup 1- chars + c@ [char] . = \ process double
39: IF dup 1 chars = IF over 1 swap c! false ELSE 1 chars - true THEN
40: \ only if more than only . ( may be number output! )
41: \ if only . => store garbage
42: ELSE false THEN >r \ numbers
43: false -rot base @ -rot
44: BEGIN over c@
45: dup [char] - =
46: IF drop >r >r >r
47: drop true r> r> r> 0 THEN
48: dup [char] + =
49: IF drop 0 THEN
50: dup [char] $ =
51: IF drop >r >r drop 16 r> r> 0 THEN
52: dup [char] & =
53: IF drop >r >r drop 10 r> r> 0 THEN
54: 0= IF 1 chars - swap char+ swap false ELSE true THEN
55: over 0= or
56: UNTIL
57: rot >r rot r> r> -rot ;
58:
59: : number? ( c-addr -- n/d flag )
60: \ return -1 if cell 1 if double 0 if garbage
61: 0 swap 0 swap \ create double number
62: count leading?
63: base @ >r base !
64: >r >r
65: >number IF 2drop false r> r> 2drop
66: r> base ! EXIT THEN
67: drop r> r>
68: IF IF dnegate 1
69: ELSE drop negate -1 THEN
70: ELSE IF 1 ELSE drop -1 THEN
71: THEN r> base ! ;
72:
73:
74:
75: \ Begin CROSS COMPILER:
76:
77: \ GhostNames 9may93jaw
78: \ second name source to search trough list
79:
80: VARIABLE GhostNames
81: 0 GhostNames !
82: : GhostName ( -- addr )
83: here GhostNames @ , GhostNames ! here 0 ,
84: name count
85: \ 2dup type space
86: dup c, here over chars allot swap move align ;
87:
88: hex
89:
90:
91: Vocabulary Cross
92: Vocabulary Target
93: Vocabulary Ghosts
94: VOCABULARY Minimal
95: only Forth also Target also also
96: definitions Forth
97:
98: : T previous Cross also Target ; immediate
99: : G Ghosts ; immediate
100: : H previous Forth also Cross ; immediate
101:
102: forth definitions
103:
104: : T previous Cross also Target ; immediate
105: : G Ghosts ; immediate
106:
107: : >cross also Cross definitions previous ;
108: : >target also Target definitions previous ;
109: : >minimal also Minimal definitions previous ;
110:
111: H
112:
113: >CROSS
114:
115: \ Variables 06oct92py
116:
117: -1 Constant NIL
118: Variable image
119: Variable tlast NIL tlast ! \ Last name field
120: Variable tlastcfa \ Last code field
121: Variable tdoes \ Resolve does> calls
122: Variable bit$
123: Variable tdp
124: : there tdp @ ;
125:
126: \ Parameter for target systems 06oct92py
127:
128: include machine.fs
129:
130: >TARGET
131:
132: \ Byte ordering and cell size 06oct92py
133:
134: : cell+ cell + ;
135: : cells cell<< lshift ;
136: : chars ;
137: : floats float * ;
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 :douser
148: -6 Constant :dodoes
149: -7 Constant :doesjump
150:
151: >CROSS
152:
153: endian 0 pad ! -1 pad c! pad @ 0<
154: = [IF] : bswap ; immediate
155: [ELSE] : bswap ( big / little -- little / big ) 0
156: cell 1- FOR bits/byte lshift over
157: [ 1 bits/byte lshift 1- ] Literal and or
158: swap bits/byte rshift swap NEXT nip ;
159: [THEN]
160:
161: \ Memory initialisation 05dec92py
162: \ Fixed bug in else part 11may93jaw
163:
164: [IFDEF] Memory \ Memory is a bigFORTH feature
165: also Memory
166: : initmem ( var len -- )
167: 2dup swap handle! >r @ r> erase ;
168: toss
169: [ELSE]
170: : initmem ( var len -- )
171: tuck allocate abort" CROSS: No memory for target"
172: ( len var adr ) dup rot !
173: ( len adr ) swap erase ;
174: [THEN]
175:
176: \ MakeKernal 12dec92py
177:
178: >MINIMAL
179: : makekernal ( targetsize -- targetsize )
180: bit$ over 1- cell>bit rshift 1+ initmem
181: image over initmem tdp off ;
182:
183: >CROSS
184: \ Bit string manipulation 06oct92py
185: \ 9may93jaw
186: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
187: : bits ( n -- n ) chars Bittable + c@ ;
188:
189: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
190: : +bit ( addr n -- ) >bit over c@ or swap c! ;
191: : -bit ( addr n -- ) >bit invert over c@ and swap c! ;
192: : relon ( taddr -- ) bit$ @ swap cell/ +bit ;
193: : reloff ( taddr -- ) bit$ @ swap cell/ -bit ;
194:
195: \ Target memory access 06oct92py
196:
197: : align+ ( taddr -- rest )
198: cell tuck 1- and - [ cell 1- ] Literal and ;
199:
200: >TARGET
201: : aligned ( taddr -- ta-addr ) dup align+ + ;
202: \ assumes cell alignment granularity (as GNU C)
203:
204: >CROSS
205: : >image ( taddr -- absaddr ) image @ + ;
206: >TARGET
207: : @ ( taddr -- w ) >image @ bswap ;
208: : ! ( w taddr -- ) >r bswap r> >image ! ;
209: : c@ ( taddr -- char ) >image c@ ;
210: : c! ( char taddr -- ) >image c! ;
211:
212: \ Target compilation primitives 06oct92py
213: \ included A! 16may93jaw
214:
215: : here ( -- there ) there ;
216: : allot ( n -- ) tdp +! ;
217: : , ( w -- ) T here H cell T allot ! H ;
218: : c, ( char -- ) T here 1 allot c! H ;
219: : align ( -- ) T here H align+ 0 ?DO bl T c, H LOOP ;
220:
221: : A! dup relon T ! H ;
222: : A, ( w -- ) T here H relon T , H ;
223:
224: >CROSS
225:
226: \ threading modell 13dec92py
227:
228: \ generic threading modell
229: : docol, ( -- ) :docol T A, 0 , H ;
230:
231: >TARGET
232: : >body ( cfa -- pfa ) T cell+ cell+ H ;
233: >CROSS
234:
235: : dodoes, ( -- ) T :doesjump A, 0 , H ;
236:
237: \ Ghost Builder 06oct92py
238:
239: \ <T T> new version with temp variable 10may93jaw
240:
241: VARIABLE VocTemp
242:
243: : <T get-current VocTemp ! also Ghosts definitions ;
244: : T> previous VocTemp @ set-current ;
245:
246: 4711 Constant <fwd> 4712 Constant <res>
247: 4713 Constant <imm>
248:
249: \ iForth makes only immediate directly after create
250: \ make atonce trick! ?
251:
252: Variable atonce atonce off
253:
254: : NoExec true ABORT" CROSS: Don't execute ghost" ;
255:
256: : GhostHeader <fwd> , 0 , ['] NoExec , ;
257:
258: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
259: : >end 3 cells + ;
260:
261: : Make-Ghost ( "name" -- ghost )
262: >in @ GhostName swap >in !
263: <T Create atonce @ IF immediate atonce off THEN
264: here tuck swap ! ghostheader T>
265: DOES> >exec @ execute ;
266:
267: \ ghost words 14oct92py
268: \ changed: 10may93py/jaw
269:
270: : gfind ( string -- ghost true/1 / string false )
271: \ searches for string in word-list ghosts
272: \ !! wouldn't it be simpler to just use search-wordlist ? ae
273: dup count [ ' ghosts >body ] ALiteral search-wordlist
274: \ >r get-order 0 set-order also ghosts r> find >r >r
275: >r r@ IF >body nip THEN r> ;
276: \ set-order r> r@ IF >body THEN r> ;
277:
278: VARIABLE Already
279:
280: : ghost ( "name" -- ghost )
281: Already off
282: >in @ name gfind IF Already on nip EXIT THEN
283: drop >in ! Make-Ghost ;
284:
285: \ resolve 14oct92py
286:
287: : resolve-loop ( ghost tcfa -- ghost tcfa )
288: >r dup >link @
289: BEGIN dup WHILE dup T @ H r@ rot T ! H REPEAT drop r> ;
290:
291: \ exists 9may93jaw
292:
293: : exists ( ghost tcfa -- )
294: over GhostNames
295: BEGIN @ dup
296: WHILE 2dup cell+ @ =
297: UNTIL
298: nip 2 cells + count cr ." CROSS: Exists: " type 4 spaces
299: swap cell+ !
300: ELSE true ABORT" CROSS: Ghostnames inconsistent"
301: THEN ;
302:
303: : resolve ( ghost tcfa -- )
304: over >magic @ <fwd> <> IF exists EXIT THEN
305: resolve-loop over >link ! <res> swap >magic ! ;
306:
307: \ gexecute ghost, 01nov92py
308:
309: : do-forward ( ghost -- )
310: >link dup @ there rot ! T A, H ;
311: : do-resolve ( ghost -- )
312: >link @ T A, H ;
313:
314: : gexecute ( ghost -- ) dup @
315: <fwd> = IF do-forward ELSE do-resolve THEN ;
316: : ghost, ghost gexecute ;
317:
318: \ .unresolved 11may93jaw
319:
320: variable ResolveFlag
321:
322: \ ?touched 11may93jaw
323:
324: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
325: 0 <> and ;
326:
327: : ?resolved ( ghostname -- )
328: dup cell+ @ ?touched
329: IF cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
330:
331: >MINIMAL
332: : .unresolved ( -- )
333: ResolveFlag off cr ." Unresolved: "
334: Ghostnames
335: BEGIN @ dup
336: WHILE dup ?resolved
337: REPEAT drop ResolveFlag @ 0= IF ." Nothing!" THEN cr ;
338:
339: >CROSS
340: \ Header states 12dec92py
341:
342: : flag! ( 8b -- ) tlast @ dup >r T c@ xor r> c! H ;
343:
344: VARIABLE ^imm
345:
346: >TARGET
347: : immediate 20 flag!
348: ^imm @ @ dup <imm> = ?EXIT
349: <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
350: <imm> ^imm @ ! ;
351: : restrict ;
352: >CROSS
353:
354: \ ALIAS2 ansforth conform alias 9may93jaw
355:
356: : ALIAS2 create here 0 , DOES> @ execute ;
357: \ usage:
358: \ ' alias2 bla !
359:
360: \ Target Header Creation 01nov92py
361:
362: : string, ( addr count -- )
363: dup T c, H bounds DO I c@ T c, H LOOP ;
364: : name, ( "name" -- ) name count string, T align H ;
365: : view, ( -- ) ( dummy ) ;
366:
367: VARIABLE CreateFlag CreateFlag off
368:
369: : (Theader ( "name" -- ghost ) T align H view,
370: tlast @ dup 0> IF T 1 cells - THEN A, H there tlast !
371: >in @ name, >in ! T here H tlastcfa !
372: CreateFlag @ IF
373: >in @ alias2 swap >in ! \ create alias in target
374: >in @ ghost swap >in !
375: swap also ghosts ' previous swap ! \ tick ghost and store in alias
376: CreateFlag off
377: ELSE ghost THEN
378: dup >magic ^imm ! \ a pointer for immediate
379: Already @ IF dup >end tdoes !
380: ELSE 0 tdoes ! THEN
381: 80 flag! ;
382:
383: VARIABLE ;Resolve 1 cells allot
384:
385: : Theader ( "name" -- ) (THeader there resolve 0 ;Resolve ! ;
386:
387: >TARGET
388: : Alias ( cfa -- ) \ name
389: (THeader over resolve T A, H 80 flag! ;
390: >CROSS
391:
392: \ Conditionals and Comments 11may93jaw
393:
394: : ;Cond
395: postpone ;
396: swap ! ; immediate
397:
398: : Cond: ( -- ) \ name {code } ;
399: atonce on
400: ghost
401: >exec
402: :NONAME ;
403:
404: : restrict? ( -- )
405: \ aborts on interprete state - ae
406: state @ 0= ABORT" CROSS: Restricted" ;
407:
408: : Comment ( -- )
409: >in @ atonce on ghost swap >in ! ' swap >exec ! ;
410:
411: Comment ( Comment \
412:
413: \ Predefined ghosts 12dec92py
414:
415: ghost 0= drop
416: ghost branch ghost ?branch 2drop
417: ghost (do) ghost (?do) 2drop
418: ghost (for) drop
419: ghost (loop) ghost (+loop) 2drop
420: ghost (next) drop
421: ghost unloop ghost ;S 2drop
422: ghost lit ghost (compile) ghost ! 2drop drop
423: ghost (;code) ghost noop 2drop
424: ghost (.") ghost (S") ghost (ABORT") 2drop drop
425:
426: \ compile 10may93jaw
427:
428: : compile ( -- ) \ name
429: restrict?
430: name gfind dup 0= ABORT" CROSS: Can't compile "
431: 0> ( immediate? )
432: IF >exec @ compile,
433: ELSE postpone literal postpone gexecute THEN ;
434: immediate
435:
436: >TARGET
437: : ' ( -- cfa ) name gfind 0= ABORT" CROSS: undefined "
438: dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
439:
440: Cond: ['] compile lit ghost gexecute ;Cond
441:
442: >CROSS
443: \ tLiteral 12dec92py
444:
445: : lit, ( n -- ) compile lit T , H ;
446: : alit, ( n -- ) compile lit T A, H ;
447:
448: >TARGET
449: Cond: Literal ( n -- ) restrict? lit, ;Cond
450: Cond: ALiteral ( n -- ) restrict? alit, ;Cond
451:
452: : Char ( "<char>" -- ) bl word char+ c@ ;
453: Cond: [Char] ( "<char>" -- ) restrict? Char lit, ;Cond
454:
455: >CROSS
456: \ Target compiling loop 12dec92py
457: \ ">tib trick thrown out 10may93jaw
458: \ number? defined at the top 11may93jaw
459:
460: \ compiled word might leave items on stack!
461: : tcom ( in name -- )
462: gfind ?dup IF 0> IF nip >exec @ execute
463: ELSE nip gexecute THEN EXIT THEN
464: number? dup IF 0> IF swap lit, THEN lit, drop
465: ELSE 2drop >in !
466: ghost gexecute THEN ;
467:
468: >TARGET
469: \ : ; DOES> 13dec92py
470: \ ] 9may93py/jaw
471:
472: : ] state on
473: BEGIN
474: BEGIN >in @ name
475: dup c@ 0= WHILE 2drop refill 0=
476: ABORT" CROSS: End of file while target compiling"
477: REPEAT
478: tcom
479: state @
480: 0=
481: UNTIL ;
482:
483: \ by the way: defining a second interpreter (a compiler-)loop
484: \ is not allowed if a system should be ans conform
485:
486: : : ( -- colon-sys ) \ Name
487: (THeader ;Resolve ! there ;Resolve cell+ !
488: docol, depth T ] H ;
489:
490: Cond: EXIT ( -- ) restrict? compile ;S ;Cond
491:
492: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
493:
494: Cond: ; ( -- ) restrict?
495: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
496: ELSE true ABORT" CROSS: Stack empty" THEN
497: compile ;S state off
498: ;Resolve @
499: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
500: ;Cond
501: Cond: [ restrict? state off ;Cond
502:
503: >CROSS
504: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
505:
506: >TARGET
507: Cond: DOES> restrict?
508: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
509: ;Cond
510: : DOES> dodoes, T here H !does depth T ] H ;
511:
512: >CROSS
513: \ Creation 01nov92py
514:
515: \ Builder 11may93jaw
516:
517: : Builder ( Create do: "name" -- )
518: >in @ alias2 swap dup >in ! >r >r
519: Make-Ghost rot swap >exec ! ,
520: r> r> >in !
521: also ghosts ' previous swap !
522: DOES> dup >exec @ execute ;
523:
524: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
525: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
526: :dodoes T A, H gexecute T here H cell - reloff ;
527:
528: : TCreate ( ghost -- )
529: CreateFlag on
530: Theader dup gdoes,
531: >end @ >exec @ execute ;
532:
533: : Build: ( -- [xt] [colon-sys] )
534: :noname postpone TCreate ;
535:
536: : gdoes> ( ghost -- addr flag )
537: state @ IF gexecute true EXIT THEN
538: cell+ @ T >body H false ;
539:
540: \ DO: ;DO 11may93jaw
541: \ changed to ?EXIT 10may93jaw
542:
543: : (does>) postpone does> ; immediate \ second level does>
544:
545: : DO: ( -- addr [xt] [colon-sys] )
546: here ghostheader
547: :noname
548: postpone (does>) postpone gdoes> postpone ?EXIT ;
549:
550: : ;DO ( addr [xt] [colon-sys] -- )
551: postpone ; ( S addr xt )
552: over >exec ! ; immediate
553:
554: : by ( -- addr ) \ Name
555: ghost >end @ ;
556:
557: >TARGET
558: \ Variables and Constants 05dec92py
559:
560: Build: ;
561: DO: ( ghost -- addr ) ;DO
562: Builder Create
563: by Create :dovar resolve
564:
565: Build: T 0 , H ;
566: by Create
567: Builder Variable
568:
569: Build: T 0 A, H ;
570: by Create
571: Builder AVariable
572:
573: \ User variables 04may94py
574:
575: >CROSS
576: Variable tup 0 tup !
577: Variable tudp 0 tudp !
578: : u, ( n -- udp )
579: tup @ tudp @ + T ! H
580: tudp @ dup cell+ tudp ! ;
581: : au, ( n -- udp )
582: tup @ tudp @ + T A! H
583: tudp @ dup cell+ tudp ! ;
584: >TARGET
585:
586: Build: T 0 u, , H ;
587: DO: ( ghost -- up-addr ) T @ H tup @ + ;DO
588: Builder User
589: by User :douser resolve
590:
591: Build: T 0 u, , 0 u, drop H ;
592: by User
593: Builder 2User
594:
595: Build: T 0 au, , H ;
596: by User
597: Builder AUser
598:
599: Build: ( n -- ) T , H ;
600: DO: ( ghost -- n ) T @ H ;DO
601: Builder Constant
602: by Constant :docon resolve
603:
604: Build: ( n -- ) T A, H ;
605: by Constant
606: Builder AConstant
607:
608: Build: T 0 , H ;
609: by Constant
610: Builder Value
611:
612: Build: ( -- ) compile noop ;
613: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
614: Builder Defer
615:
616: \ structural conditionals 17dec92py
617:
618: >CROSS
619: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
620: : sys? ( sys -- sys ) dup 0= ?struc ;
621: : >mark ( -- sys ) T here 0 , H ;
622: : >resolve ( sys -- ) T here over - swap ! H ;
623: : <resolve ( sys -- ) T here - , H ;
624: >TARGET
625:
626: \ Structural Conditionals 12dec92py
627:
628: Cond: BUT restrict? sys? swap ;Cond
629: Cond: YET restrict? sys? dup ;Cond
630:
631: >CROSS
632: Variable tleavings
633: >TARGET
634:
635: Cond: DONE ( addr -- ) restrict? tleavings @
636: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
637: tleavings ! drop ;Cond
638:
639: >CROSS
640: : (leave T here H tleavings @ T , H tleavings ! ;
641: >TARGET
642:
643: Cond: LEAVE restrict? compile branch (leave ;Cond
644: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
645:
646: \ Structural Conditionals 12dec92py
647:
648: Cond: AHEAD restrict? compile branch >mark ;Cond
649: Cond: IF restrict? compile ?branch >mark ;Cond
650: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
651: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
652:
653: Cond: BEGIN restrict? T here H ;Cond
654: Cond: WHILE restrict? sys? compile IF swap ;Cond
655: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
656: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
657: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
658:
659: \ Structural Conditionals 12dec92py
660:
661: Cond: DO restrict? compile (do) T here H ;Cond
662: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
663: Cond: FOR restrict? compile (for) T here H ;Cond
664:
665: >CROSS
666: : loop] dup <resolve cell - compile DONE compile unloop ;
667: >TARGET
668:
669: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
670: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
671: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
672:
673: \ String words 23feb93py
674:
675: : ," [char] " parse string, T align H ;
676:
677: Cond: ." restrict? compile (.") T ," H ;Cond
678: Cond: S" restrict? compile (S") T ," H ;Cond
679: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
680:
681: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
682: : IS T ' >body ! H ;
683:
684: \ LINKED ERR" ENV" 2ENV" 18may93jaw
685:
686: \ linked list primitive
687: : linked T here over @ A, swap ! H ;
688:
689: : err" s" ErrLink linked" evaluate T , H
690: [char] " parse string, T align H ;
691:
692: : env" [char] " parse s" EnvLink linked" evaluate
693: string, T align , H ;
694:
695: : 2env" [char] " parse s" EnvLink linked" evaluate
696: here >r string, T align , , H
697: r> dup T c@ H 80 and swap T c! H ;
698:
699: \ compile must be last 22feb93py
700:
701: Cond: compile ( -- ) restrict? \ name
702: name gfind dup 0= ABORT" CROSS: Can't compile"
703: 0> IF gexecute
704: ELSE dup >magic @ <imm> =
705: IF gexecute
706: ELSE compile (compile) gexecute THEN THEN ;Cond
707:
708: Cond: postpone ( -- ) restrict? \ name
709: name gfind dup 0= ABORT" CROSS: Can't compile"
710: 0> IF gexecute
711: ELSE dup >magic @ <imm> =
712: IF gexecute
713: ELSE compile (compile) gexecute THEN THEN ;Cond
714:
715: >MINIMAL
716: also minimal
717: \ Usefull words 13feb93py
718:
719: : KB 400 * ;
720:
721: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
722:
723: : there? name gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
724:
725: : [IFDEF] there? postpone [IF] ;
726: : [IFUNDEF] there? 0= postpone [IF] ;
727:
728: \ C: \- \+ Conditional Compiling 09jun93jaw
729:
730: : C: >in @ there? 0=
731: IF >in ! T : H
732: ELSE drop
733: BEGIN bl word dup c@
734: IF count comment? s" ;" compare 0= ?EXIT
735: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
736: THEN
737: AGAIN
738: THEN ;
739:
740: also minimal
741:
742: : \- there? IF postpone \ THEN ;
743: : \+ there? 0= IF postpone \ THEN ;
744:
745: : [IF] postpone [IF] ;
746: : [THEN] postpone [THEN] ;
747: : [ELSE] postpone [ELSE] ;
748:
749: Cond: [IF] [IF] ;Cond
750: Cond: [IFDEF] [IFDEF] ;Cond
751: Cond: [IFUNDEF] [IFUNDEF] ;Cond
752: Cond: [THEN] [THEN] ;Cond
753: Cond: [ELSE] [ELSE] ;Cond
754:
755: \ save-cross 17mar93py
756:
757: \ i'm not interested in bigforth features this time 10may93jaw
758: \ [IFDEF] file
759: \ also file
760: \ [THEN]
761: \ included throw after create-file 11may93jaw
762:
763: endian Constant endian
764:
765: : save-cross ( "name" -- )
766: bl parse ." Saving to " 2dup type
767: w/o bin create-file throw >r
768: image @ there r@ write-file throw
769: bit$ @ there 1- cell>bit rshift 1+ r@ write-file throw
770: r> close-file throw ;
771:
772: \ words that should be in minimal
773:
774: : + + ; : 1- 1- ;
775: : - - ; : 2* 2* ;
776: : dup dup ; : over over ;
777: : swap swap ; : rot rot ;
778:
779: \ include bug5.fs
780: \ only forth also minimal definitions
781:
782: : \ postpone \ ;
783: : ( postpone ( ;
784: : include bl word count included ;
785: : .( [char] ) parse type ;
786: : cr cr ;
787:
788: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
789: only forth also minimal definitions
790:
791: \ cross-compiler words
792:
793: : decimal decimal ;
794: : hex hex ;
795:
796: : tudp T tudp H ;
797: : tup T tup H ; minimal
798:
799: \ for debugging...
800: : order order ;
801: : words words ;
802: : .s .s ;
803:
804: : bye bye ;
805:
806: \ turnkey direction
807: : H forth ; immediate
808: : T minimal ; immediate
809: : G ghosts ; immediate
810:
811: : turnkey 0 set-order also Target definitions
812: also Minimal also ;
813:
814: \ these ones are pefered:
815:
816: : lock turnkey ;
817: : unlock forth also cross ;
818:
819: unlock definitions also minimal
820: : lock lock ;
821: lock
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