1: \ CROSS.FS The Cross-Compiler 06oct92py
2: \ $Id: cross.fs,v 1.24 1995/02/23 20:17:16 pazsan Exp $
3: \ Idea and implementation: Bernd Paysan (py)
4: \ Copyright 1992-94 by the GNU Forth 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: : string, ( c-addr u -- )
27: \ puts down string as cstring
28: dup c, here swap chars dup allot move ;
29: ' falign Alias cfalign
30: : comment? ( c-addr u -- c-addr u )
31: 2dup s" (" compare 0=
32: IF postpone (
33: ELSE 2dup s" \" compare 0= IF postpone \ THEN
34: THEN ;
35:
36: decimal
37:
38: \ Begin CROSS COMPILER:
39:
40: \ GhostNames 9may93jaw
41: \ second name source to search trough list
42:
43: VARIABLE GhostNames
44: 0 GhostNames !
45: : GhostName ( -- addr )
46: here GhostNames @ , GhostNames ! here 0 ,
47: bl word count
48: \ 2dup type space
49: string, cfalign ;
50:
51: hex
52:
53:
54: Vocabulary Cross
55: Vocabulary Target
56: Vocabulary Ghosts
57: VOCABULARY Minimal
58: only Forth also Target also also
59: definitions Forth
60:
61: : T previous Cross also Target ; immediate
62: : G Ghosts ; immediate
63: : H previous Forth also Cross ; immediate
64:
65: forth definitions
66:
67: : T previous Cross also Target ; immediate
68: : G Ghosts ; immediate
69:
70: : >cross also Cross definitions previous ;
71: : >target also Target definitions previous ;
72: : >minimal also Minimal definitions previous ;
73:
74: H
75:
76: >CROSS
77:
78: \ Variables 06oct92py
79:
80: -1 Constant NIL
81: Variable image
82: Variable tlast NIL tlast ! \ Last name field
83: Variable tlastcfa \ Last code field
84: Variable tdoes \ Resolve does> calls
85: Variable bit$
86: Variable tdp
87: : there tdp @ ;
88:
89: \ Parameter for target systems 06oct92py
90:
91: included
92:
93: \ Create additional parameters 19jan95py
94:
95: T
96: cell Constant tcell
97: cell<< Constant tcell<<
98: cell>bit Constant tcell>bit
99: bits/byte Constant tbits/byte
100: float Constant tfloat
101: 1 bits/byte lshift Constant maxbyte
102: H
103:
104: >TARGET
105:
106: \ Byte ordering and cell size 06oct92py
107:
108: : cell+ tcell + ;
109: : cells tcell<< lshift ;
110: : chars ;
111: : floats tfloat * ;
112:
113: >CROSS
114: : cell/ tcell<< rshift ;
115: >TARGET
116: 20 CONSTANT bl
117: -1 Constant NIL
118: -2 Constant :docol
119: -3 Constant :docon
120: -4 Constant :dovar
121: -5 Constant :douser
122: -6 Constant :dodefer
123: -7 Constant :dostruc
124: -8 Constant :dodoes
125: -9 Constant :doesjump
126:
127: >CROSS
128:
129: bigendian
130: [IF]
131: : T! ( n addr -- ) >r s>d r> tcell bounds swap 1-
132: DO maxbyte ud/mod rot I c! -1 +LOOP 2drop ;
133: : T@ ( addr -- n ) >r 0 0 r> tcell bounds
134: DO maxbyte * swap maxbyte um* rot + swap I c@ + swap LOOP d>s ;
135: [ELSE]
136: : T! ( n addr -- ) >r s>d r> tcell bounds
137: DO maxbyte ud/mod rot I c! LOOP 2drop ;
138: : T@ ( addr -- n ) >r 0 0 r> tcell bounds swap 1-
139: DO maxbyte * swap maxbyte um* rot + swap I c@ + swap -1 +LOOP d>s ;
140: [THEN]
141:
142: \ Memory initialisation 05dec92py
143: \ Fixed bug in else part 11may93jaw
144:
145: [IFDEF] Memory \ Memory is a bigFORTH feature
146: also Memory
147: : initmem ( var len -- )
148: 2dup swap handle! >r @ r> erase ;
149: toss
150: [ELSE]
151: : initmem ( var len -- )
152: tuck allocate abort" CROSS: No memory for target"
153: ( len var adr ) dup rot !
154: ( len adr ) swap erase ;
155: [THEN]
156:
157: \ MakeKernal 12dec92py
158:
159: >MINIMAL
160: : makekernal ( targetsize -- targetsize )
161: bit$ over 1- cell>bit rshift 1+ initmem
162: image over initmem tdp off ;
163:
164: >CROSS
165: \ Bit string manipulation 06oct92py
166: \ 9may93jaw
167: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
168: : bits ( n -- n ) chars Bittable + c@ ;
169:
170: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
171: : +bit ( addr n -- ) >bit over c@ or swap c! ;
172: : -bit ( addr n -- ) >bit invert over c@ and swap c! ;
173: : relon ( taddr -- ) bit$ @ swap cell/ +bit ;
174: : reloff ( taddr -- ) bit$ @ swap cell/ -bit ;
175:
176: \ Target memory access 06oct92py
177:
178: : align+ ( taddr -- rest )
179: cell tuck 1- and - [ cell 1- ] Literal and ;
180: : cfalign+ ( taddr -- rest )
181: \ see kernal.fs:cfaligned
182: float tuck 1- and - [ float 1- ] Literal and ;
183:
184: >TARGET
185: : aligned ( taddr -- ta-addr ) dup align+ + ;
186: \ assumes cell alignment granularity (as GNU C)
187:
188: : cfaligned ( taddr1 -- taddr2 )
189: \ see kernal.fs
190: dup cfalign+ + ;
191:
192: >CROSS
193: : >image ( taddr -- absaddr ) image @ + ;
194: >TARGET
195: : @ ( taddr -- w ) >image t@ ;
196: : ! ( w taddr -- ) >image t! ;
197: : c@ ( taddr -- char ) >image c@ ;
198: : c! ( char taddr -- ) >image c! ;
199: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
200: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
201:
202: \ Target compilation primitives 06oct92py
203: \ included A! 16may93jaw
204:
205: : here ( -- there ) there ;
206: : allot ( n -- ) tdp +! ;
207: : , ( w -- ) T here H cell T allot ! H ;
208: : c, ( char -- ) T here 1 allot c! H ;
209: : align ( -- ) T here H align+ 0 ?DO bl T c, H LOOP ;
210: : cfalign ( -- )
211: T here H cfalign+ 0 ?DO bl T c, H LOOP ;
212:
213: : A! dup relon T ! H ;
214: : A, ( w -- ) T here H relon T , H ;
215:
216: >CROSS
217:
218: \ threading modell 13dec92py
219:
220: \ generic threading modell
221: : docol, ( -- ) :docol T A, 0 , H ;
222:
223: >TARGET
224: : >body ( cfa -- pfa ) T cell+ cell+ H ;
225: >CROSS
226:
227: : dodoes, ( -- ) T :doesjump A, 0 , H ;
228:
229: \ Ghost Builder 06oct92py
230:
231: \ <T T> new version with temp variable 10may93jaw
232:
233: VARIABLE VocTemp
234:
235: : <T get-current VocTemp ! also Ghosts definitions ;
236: : T> previous VocTemp @ set-current ;
237:
238: 4711 Constant <fwd> 4712 Constant <res>
239: 4713 Constant <imm>
240:
241: \ iForth makes only immediate directly after create
242: \ make atonce trick! ?
243:
244: Variable atonce atonce off
245:
246: : NoExec true ABORT" CROSS: Don't execute ghost" ;
247:
248: : GhostHeader <fwd> , 0 , ['] NoExec , ;
249:
250: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
251: : >end 3 cells + ;
252:
253: Variable last-ghost
254: : Make-Ghost ( "name" -- ghost )
255: >in @ GhostName swap >in !
256: <T Create atonce @ IF immediate atonce off THEN
257: here tuck swap ! ghostheader T>
258: DOES> dup last-ghost ! >exec @ execute ;
259:
260: \ ghost words 14oct92py
261: \ changed: 10may93py/jaw
262:
263: : gfind ( string -- ghost true/1 / string false )
264: \ searches for string in word-list ghosts
265: \ !! wouldn't it be simpler to just use search-wordlist ? ae
266: dup count [ ' ghosts >body ] ALiteral search-wordlist
267: dup IF >r >body nip r> THEN ;
268:
269: VARIABLE Already
270:
271: : ghost ( "name" -- ghost )
272: Already off
273: >in @ bl word gfind IF Already on nip EXIT THEN
274: drop >in ! Make-Ghost ;
275:
276: \ resolve 14oct92py
277:
278: : resolve-loop ( ghost tcfa -- ghost tcfa )
279: >r dup >link @
280: BEGIN dup WHILE dup T @ H r@ rot T ! H REPEAT drop r> ;
281:
282: \ exists 9may93jaw
283:
284: : exists ( ghost tcfa -- )
285: over GhostNames
286: BEGIN @ dup
287: WHILE 2dup cell+ @ =
288: UNTIL
289: 2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
290: swap cell+ !
291: ELSE true abort" CROSS: Ghostnames inconsistent "
292: THEN ;
293:
294: : resolve ( ghost tcfa -- )
295: over >magic @ <fwd> <> IF exists EXIT THEN
296: resolve-loop over >link ! <res> swap >magic ! ;
297:
298: \ gexecute ghost, 01nov92py
299:
300: : do-forward ( ghost -- )
301: >link dup @ there rot ! T A, H ;
302: : do-resolve ( ghost -- )
303: >link @ T A, H ;
304:
305: : gexecute ( ghost -- ) dup @
306: <fwd> = IF do-forward ELSE do-resolve THEN ;
307: : ghost, ghost gexecute ;
308:
309: \ .unresolved 11may93jaw
310:
311: variable ResolveFlag
312:
313: \ ?touched 11may93jaw
314:
315: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
316: 0 <> and ;
317:
318: : ?resolved ( ghostname -- )
319: dup cell+ @ ?touched
320: IF cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
321:
322: >MINIMAL
323: : .unresolved ( -- )
324: ResolveFlag off cr ." Unresolved: "
325: Ghostnames
326: BEGIN @ dup
327: WHILE dup ?resolved
328: REPEAT drop ResolveFlag @
329: IF
330: abort" Unresolved words!"
331: ELSE
332: ." Nothing!"
333: THEN
334: cr ;
335:
336: >CROSS
337: \ Header states 12dec92py
338:
339: : flag! ( 8b -- ) tlast @ dup >r T c@ xor r> c! H ;
340:
341: VARIABLE ^imm
342:
343: >TARGET
344: : immediate 20 flag!
345: ^imm @ @ dup <imm> = IF drop EXIT THEN
346: <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
347: <imm> ^imm @ ! ;
348: : restrict 40 flag! ;
349: >CROSS
350:
351: \ ALIAS2 ansforth conform alias 9may93jaw
352:
353: : ALIAS2 create here 0 , DOES> @ execute ;
354: \ usage:
355: \ ' <name> alias2 bla !
356:
357: \ Target Header Creation 01nov92py
358:
359: : string, ( addr count -- )
360: dup T c, H bounds DO I c@ T c, H LOOP ;
361: : name, ( "name" -- ) bl word count string, T cfalign H ;
362: : view, ( -- ) ( dummy ) ;
363:
364: VARIABLE CreateFlag CreateFlag off
365:
366: : (Theader ( "name" -- ghost ) T align H view,
367: tlast @ dup 0> IF T 1 cells - THEN A, H there tlast !
368: >in @ name, >in ! T here H tlastcfa !
369: CreateFlag @ IF
370: >in @ alias2 swap >in ! \ create alias in target
371: >in @ ghost swap >in !
372: swap also ghosts ' previous swap ! \ tick ghost and store in alias
373: CreateFlag off
374: ELSE ghost THEN
375: dup >magic ^imm ! \ a pointer for immediate
376: Already @ IF dup >end tdoes !
377: ELSE 0 tdoes ! THEN
378: 80 flag! ;
379:
380: VARIABLE ;Resolve 1 cells allot
381:
382: : Theader ( "name" -- ghost )
383: (THeader dup there resolve 0 ;Resolve ! ;
384:
385: >TARGET
386: : Alias ( cfa -- ) \ name
387: (THeader over resolve T A, H 80 flag! ;
388: >CROSS
389:
390: \ Conditionals and Comments 11may93jaw
391:
392: : ;Cond
393: postpone ;
394: swap ! ; immediate
395:
396: : Cond: ( -- ) \ name {code } ;
397: atonce on
398: ghost
399: >exec
400: :NONAME ;
401:
402: : restrict? ( -- )
403: \ aborts on interprete state - ae
404: state @ 0= ABORT" CROSS: Restricted" ;
405:
406: : Comment ( -- )
407: >in @ atonce on ghost swap >in ! ' swap >exec ! ;
408:
409: Comment ( Comment \
410:
411: \ Predefined ghosts 12dec92py
412:
413: ghost 0= drop
414: ghost branch ghost ?branch 2drop
415: ghost (do) ghost (?do) 2drop
416: ghost (for) drop
417: ghost (loop) ghost (+loop) 2drop
418: ghost (next) drop
419: ghost unloop ghost ;S 2drop
420: ghost lit ghost (compile) ghost ! 2drop drop
421: ghost (;code) ghost noop 2drop
422: ghost (.") ghost (S") ghost (ABORT") 2drop drop
423: ghost '
424:
425: \ compile 10may93jaw
426:
427: : compile ( -- ) \ name
428: restrict?
429: bl word gfind dup 0= ABORT" CROSS: Can't compile "
430: 0> ( immediate? )
431: IF >exec @ compile,
432: ELSE postpone literal postpone gexecute THEN ;
433: immediate
434:
435: >TARGET
436: : ' ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
437: dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
438:
439: Cond: ['] compile lit ghost gexecute ;Cond
440:
441: Cond: chars ;Cond
442:
443: >CROSS
444: \ tLiteral 12dec92py
445:
446: : lit, ( n -- ) compile lit T , H ;
447: : alit, ( n -- ) compile lit T A, H ;
448:
449: >TARGET
450: Cond: Literal ( n -- ) restrict? lit, ;Cond
451: Cond: ALiteral ( n -- ) restrict? alit, ;Cond
452:
453: : Char ( "<char>" -- ) bl word char+ c@ ;
454: Cond: [Char] ( "<char>" -- ) restrict? Char lit, ;Cond
455:
456: >CROSS
457: \ Target compiling loop 12dec92py
458: \ ">tib trick thrown out 10may93jaw
459: \ number? defined at the top 11may93jaw
460:
461: \ compiled word might leave items on stack!
462: : tcom ( in name -- )
463: gfind ?dup IF 0> IF nip >exec @ execute
464: ELSE nip gexecute THEN EXIT THEN
465: number? dup IF 0> IF swap lit, THEN lit, drop
466: ELSE 2drop >in !
467: ghost gexecute THEN ;
468:
469: >TARGET
470: \ : ; DOES> 13dec92py
471: \ ] 9may93py/jaw
472:
473: : ] state on
474: BEGIN
475: BEGIN >in @ bl word
476: dup c@ 0= WHILE 2drop refill 0=
477: ABORT" CROSS: End of file while target compiling"
478: REPEAT
479: tcom
480: state @
481: 0=
482: UNTIL ;
483:
484: \ by the way: defining a second interpreter (a compiler-)loop
485: \ is not allowed if a system should be ans conform
486:
487: : : ( -- colon-sys ) \ Name
488: (THeader ;Resolve ! there ;Resolve cell+ !
489: docol, depth T ] H ;
490:
491: Cond: EXIT ( -- ) restrict? compile ;S ;Cond
492:
493: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
494:
495: Cond: ; ( -- ) restrict?
496: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
497: ELSE true ABORT" CROSS: Stack empty" THEN
498: compile ;S state off
499: ;Resolve @
500: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
501: ;Cond
502: Cond: [ restrict? state off ;Cond
503:
504: >CROSS
505: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
506:
507: >TARGET
508: Cond: DOES> restrict?
509: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
510: ;Cond
511: : DOES> dodoes, T here H !does depth T ] H ;
512:
513: >CROSS
514: \ Creation 01nov92py
515:
516: \ Builder 11may93jaw
517:
518: : Builder ( Create do: "name" -- )
519: >in @ alias2 swap dup >in ! >r >r
520: Make-Ghost rot swap >exec ! ,
521: r> r> >in !
522: also ghosts ' previous swap ! ;
523: \ DOES> dup >exec @ execute ;
524:
525: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
526: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
527: :dodoes T A, H gexecute T here H cell - reloff ;
528:
529: : TCreate ( -- )
530: last-ghost @
531: CreateFlag on
532: Theader >r dup gdoes,
533: >end @ >exec @ r> >exec ! ;
534:
535: : Build: ( -- [xt] [colon-sys] )
536: :noname postpone TCreate ;
537:
538: : gdoes> ( ghost -- addr flag )
539: last-ghost @
540: state @ IF gexecute true EXIT THEN
541: cell+ @ T >body H false ;
542:
543: \ DO: ;DO 11may93jaw
544: \ changed to ?EXIT 10may93jaw
545:
546: : DO: ( -- addr [xt] [colon-sys] )
547: here ghostheader
548: :noname 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 T cell+ H tudp ! ;
581: : au, ( n -- udp )
582: tup @ tudp @ + T A! H
583: tudp @ dup T cell+ H 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: ( d -- ) T , , H ;
609: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
610: Builder 2Constant
611:
612: Build: T 0 , H ;
613: by Constant
614: Builder Value
615:
616: Build: ( -- ) compile noop ;
617: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
618: Builder Defer
619: by Defer :dodefer resolve
620:
621: \ Sturctures 23feb95py
622:
623: >CROSS
624: : nalign ( addr1 n -- addr2 )
625: \ addr2 is the aligned version of addr1 wrt the alignment size n
626: 1- tuck + swap invert and ;
627: >TARGET
628:
629: Build: >r rot r@ nalign dup T , H ( align1 size offset )
630: + swap r> nalign ;
631: DO: T @ H + ;DO
632: Builder Field
633: by Field :dostruc resolve
634:
635: : struct T 0 1 chars H ;
636: : end-struct T 2Constant H ;
637:
638: : cells: ( n -- size align )
639: T cells 1 cells H ;
640:
641: \ ' 2Constant Alias2 end-struct
642: \ 0 1 T Chars H 2Constant struct
643:
644: \ structural conditionals 17dec92py
645:
646: >CROSS
647: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
648: : sys? ( sys -- sys ) dup 0= ?struc ;
649: : >mark ( -- sys ) T here 0 , H ;
650: : >resolve ( sys -- ) T here over - swap ! H ;
651: : <resolve ( sys -- ) T here - , H ;
652: >TARGET
653:
654: \ Structural Conditionals 12dec92py
655:
656: Cond: BUT restrict? sys? swap ;Cond
657: Cond: YET restrict? sys? dup ;Cond
658:
659: >CROSS
660: Variable tleavings
661: >TARGET
662:
663: Cond: DONE ( addr -- ) restrict? tleavings @
664: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
665: tleavings ! drop ;Cond
666:
667: >CROSS
668: : (leave T here H tleavings @ T , H tleavings ! ;
669: >TARGET
670:
671: Cond: LEAVE restrict? compile branch (leave ;Cond
672: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
673:
674: \ Structural Conditionals 12dec92py
675:
676: Cond: AHEAD restrict? compile branch >mark ;Cond
677: Cond: IF restrict? compile ?branch >mark ;Cond
678: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
679: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
680:
681: Cond: BEGIN restrict? T here H ;Cond
682: Cond: WHILE restrict? sys? compile IF swap ;Cond
683: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
684: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
685: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
686:
687: \ Structural Conditionals 12dec92py
688:
689: Cond: DO restrict? compile (do) T here H ;Cond
690: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
691: Cond: FOR restrict? compile (for) T here H ;Cond
692:
693: >CROSS
694: : loop] dup <resolve cell - compile DONE compile unloop ;
695: >TARGET
696:
697: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
698: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
699: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
700:
701: \ String words 23feb93py
702:
703: : ," [char] " parse string, T align H ;
704:
705: Cond: ." restrict? compile (.") T ," H ;Cond
706: Cond: S" restrict? compile (S") T ," H ;Cond
707: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
708:
709: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
710: : IS T ' >body ! H ;
711: Cond: TO T ' >body H compile ALiteral compile ! ;Cond
712: : TO T ' >body ! H ;
713:
714: \ LINKED ERR" ENV" 2ENV" 18may93jaw
715:
716: \ linked list primitive
717: : linked T here over @ A, swap ! H ;
718:
719: : err" s" ErrLink linked" evaluate T , H
720: [char] " parse string, T align H ;
721:
722: : env" [char] " parse s" EnvLink linked" evaluate
723: string, T align , H ;
724:
725: : 2env" [char] " parse s" EnvLink linked" evaluate
726: here >r string, T align , , H
727: r> dup T c@ H 80 and swap T c! H ;
728:
729: \ compile must be last 22feb93py
730:
731: Cond: compile ( -- ) restrict? \ name
732: bl word gfind dup 0= ABORT" CROSS: Can't compile"
733: 0> IF gexecute
734: ELSE dup >magic @ <imm> =
735: IF gexecute
736: ELSE compile (compile) gexecute THEN THEN ;Cond
737:
738: Cond: postpone ( -- ) restrict? \ name
739: bl word gfind dup 0= ABORT" CROSS: Can't compile"
740: 0> IF gexecute
741: ELSE dup >magic @ <imm> =
742: IF gexecute
743: ELSE compile (compile) gexecute THEN THEN ;Cond
744:
745: >MINIMAL
746: also minimal
747: \ Usefull words 13feb93py
748:
749: : KB 400 * ;
750:
751: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
752:
753: : there? bl word gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
754:
755: : [IFDEF] there? postpone [IF] ;
756: : [IFUNDEF] there? 0= postpone [IF] ;
757:
758: \ C: \- \+ Conditional Compiling 09jun93jaw
759:
760: : C: >in @ there? 0=
761: IF >in ! T : H
762: ELSE drop
763: BEGIN bl word dup c@
764: IF count comment? s" ;" compare 0= ?EXIT
765: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
766: THEN
767: AGAIN
768: THEN ;
769:
770: also minimal
771:
772: : \- there? IF postpone \ THEN ;
773: : \+ there? 0= IF postpone \ THEN ;
774:
775: : [IF] postpone [IF] ;
776: : [THEN] postpone [THEN] ;
777: : [ELSE] postpone [ELSE] ;
778:
779: Cond: [IF] [IF] ;Cond
780: Cond: [IFDEF] [IFDEF] ;Cond
781: Cond: [IFUNDEF] [IFUNDEF] ;Cond
782: Cond: [THEN] [THEN] ;Cond
783: Cond: [ELSE] [ELSE] ;Cond
784:
785: \ save-cross 17mar93py
786:
787: \ i'm not interested in bigforth features this time 10may93jaw
788: \ [IFDEF] file
789: \ also file
790: \ [THEN]
791: \ included throw after create-file 11may93jaw
792:
793: bigendian Constant bigendian
794:
795: : save-cross ( "name" -- )
796: bl parse ." Saving to " 2dup type
797: w/o bin create-file throw >r
798: s" gforth00" r@ write-file throw \ write magic
799: image @ there r@ write-file throw \ write image
800: bit$ @ there 1- cell>bit rshift 1+
801: r@ write-file throw \ write tags
802: r> close-file throw ;
803:
804: \ words that should be in minimal
805:
806: : + + ; : 1- 1- ;
807: : - - ; : 2* 2* ;
808: : * * ; : / / ;
809: : dup dup ; : over over ;
810: : swap swap ; : rot rot ;
811: : drop drop ; : = = ;
812: : lshift lshift ; : 2/ 2/ ;
813: : . . ;
814: cell constant cell
815:
816: \ include bug5.fs
817: \ only forth also minimal definitions
818:
819: : \ postpone \ ;
820: : ( postpone ( ;
821: : include bl word count included ;
822: : .( [char] ) parse type ;
823: : cr cr ;
824:
825: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
826: only forth also minimal definitions
827:
828: \ cross-compiler words
829:
830: : decimal decimal ;
831: : hex hex ;
832:
833: : tudp T tudp H ;
834: : tup T tup H ; minimal
835:
836: \ for debugging...
837: : order order ;
838: : words words ;
839: : .s .s ;
840:
841: : bye bye ;
842:
843: \ turnkey direction
844: : H forth ; immediate
845: : T minimal ; immediate
846: : G ghosts ; immediate
847:
848: : turnkey 0 set-order also Target definitions
849: also Minimal also ;
850:
851: \ these ones are pefered:
852:
853: : lock turnkey ;
854: : unlock forth also cross ;
855:
856: unlock definitions also minimal
857: : lock lock ;
858: lock
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>