Annotation of gforth/cross.fs, revision 1.19
1.1 anton 1: \ CROSS.FS The Cross-Compiler 06oct92py
1.15 pazsan 2: \ $Id: cross.fs,v 1.14 1994/10/24 19:15:53 anton Exp $
1.1 anton 3: \ Idea and implementation: Bernd Paysan (py)
1.15 pazsan 4: \ Copyright 1992-94 by the GNU Forth Development Group
1.1 anton 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:
1.9 pazsan 24: \ include other.fs \ ansforth extentions for cross
1.1 anton 25:
1.5 pazsan 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:
1.1 anton 32: decimal
33:
34: \ Begin CROSS COMPILER:
35:
36: \ GhostNames 9may93jaw
37: \ second name source to search trough list
38:
39: VARIABLE GhostNames
40: 0 GhostNames !
41: : GhostName ( -- addr )
42: here GhostNames @ , GhostNames ! here 0 ,
1.13 pazsan 43: bl word count
1.1 anton 44: \ 2dup type space
45: dup c, here over chars allot swap move align ;
46:
47: hex
48:
49:
50: Vocabulary Cross
51: Vocabulary Target
52: Vocabulary Ghosts
53: VOCABULARY Minimal
54: only Forth also Target also also
55: definitions Forth
56:
57: : T previous Cross also Target ; immediate
58: : G Ghosts ; immediate
59: : H previous Forth also Cross ; immediate
60:
61: forth definitions
62:
63: : T previous Cross also Target ; immediate
64: : G Ghosts ; immediate
65:
66: : >cross also Cross definitions previous ;
67: : >target also Target definitions previous ;
68: : >minimal also Minimal definitions previous ;
69:
70: H
71:
72: >CROSS
73:
74: \ Variables 06oct92py
75:
76: -1 Constant NIL
77: Variable image
78: Variable tlast NIL tlast ! \ Last name field
79: Variable tlastcfa \ Last code field
80: Variable tdoes \ Resolve does> calls
81: Variable bit$
82: Variable tdp
83: : there tdp @ ;
84:
85: \ Parameter for target systems 06oct92py
86:
1.13 pazsan 87: included
1.1 anton 88:
1.19 ! pazsan 89: \ Create additional parameters 19jan95py
! 90:
! 91: T
! 92: cell Constant tcell
! 93: cell<< Constant tcell<<
! 94: cell>bit Constant tcell>bit
! 95: bits/byte Constant tbits/byte
! 96: float Constant tfloat
! 97: 1 bits/byte lshift Constant maxbyte
! 98: H
! 99:
1.1 anton 100: >TARGET
101:
102: \ Byte ordering and cell size 06oct92py
103:
1.19 ! pazsan 104: : cell+ tcell + ;
! 105: : cells tcell<< lshift ;
1.1 anton 106: : chars ;
1.19 ! pazsan 107: : floats tfloat * ;
1.6 anton 108:
1.1 anton 109: >CROSS
1.19 ! pazsan 110: : cell/ tcell<< rshift ;
1.1 anton 111: >TARGET
112: 20 CONSTANT bl
113: -1 Constant NIL
114: -2 Constant :docol
115: -3 Constant :docon
116: -4 Constant :dovar
1.3 pazsan 117: -5 Constant :douser
1.10 anton 118: -6 Constant :dodefer
119: -7 Constant :dodoes
120: -8 Constant :doesjump
1.1 anton 121:
122: >CROSS
123:
1.12 anton 124: bigendian 0 pad ! -1 pad c! pad @ 0<
1.19 ! pazsan 125: = [IF]
! 126: \ : bswap ; immediate
! 127: : T! ( n addr -- ) >r s>d r> tcell bounds swap 1-
! 128: DO maxbyte ud/mod rot I c! -1 +LOOP 2drop ;
! 129: : T@ ( addr -- n ) >r 0 0 r> tcell bounds
! 130: DO maxbyte * swap maxbyte um* rot + swap I c@ + swap LOOP d>s ;
! 131:
! 132: [ELSE]
! 133: : T! ( n addr -- ) >r s>d r> tcell bounds
! 134: DO maxbyte ud/mod rot I c! LOOP 2drop ;
! 135: : T@ ( addr -- n ) >r 0 0 r> tcell bounds swap 1-
! 136: DO maxbyte * swap maxbyte um* rot + swap I c@ + swap -1 +LOOP d>s ;
! 137:
! 138: \ : bswap ( big / little -- little / big ) 0
! 139: \ cell 1- FOR bits/byte lshift over
! 140: \ [ 1 bits/byte lshift 1- ] Literal and or
! 141: \ swap bits/byte rshift swap NEXT nip ;
1.1 anton 142: [THEN]
143:
144: \ Memory initialisation 05dec92py
145: \ Fixed bug in else part 11may93jaw
146:
147: [IFDEF] Memory \ Memory is a bigFORTH feature
1.5 pazsan 148: also Memory
1.1 anton 149: : initmem ( var len -- )
150: 2dup swap handle! >r @ r> erase ;
1.5 pazsan 151: toss
1.1 anton 152: [ELSE]
153: : initmem ( var len -- )
154: tuck allocate abort" CROSS: No memory for target"
155: ( len var adr ) dup rot !
156: ( len adr ) swap erase ;
157: [THEN]
158:
159: \ MakeKernal 12dec92py
160:
161: >MINIMAL
162: : makekernal ( targetsize -- targetsize )
163: bit$ over 1- cell>bit rshift 1+ initmem
164: image over initmem tdp off ;
165:
166: >CROSS
167: \ Bit string manipulation 06oct92py
168: \ 9may93jaw
169: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
170: : bits ( n -- n ) chars Bittable + c@ ;
171:
172: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
173: : +bit ( addr n -- ) >bit over c@ or swap c! ;
1.4 pazsan 174: : -bit ( addr n -- ) >bit invert over c@ and swap c! ;
1.1 anton 175: : relon ( taddr -- ) bit$ @ swap cell/ +bit ;
1.4 pazsan 176: : reloff ( taddr -- ) bit$ @ swap cell/ -bit ;
1.1 anton 177:
178: \ Target memory access 06oct92py
179:
180: : align+ ( taddr -- rest )
181: cell tuck 1- and - [ cell 1- ] Literal and ;
182:
183: >TARGET
184: : aligned ( taddr -- ta-addr ) dup align+ + ;
185: \ assumes cell alignment granularity (as GNU C)
186:
187: >CROSS
188: : >image ( taddr -- absaddr ) image @ + ;
189: >TARGET
1.19 ! pazsan 190: : @ ( taddr -- w ) >image t@ ;
! 191: : ! ( w taddr -- ) >image t! ;
1.1 anton 192: : c@ ( taddr -- char ) >image c@ ;
193: : c! ( char taddr -- ) >image c! ;
1.7 anton 194: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
195: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
1.1 anton 196:
197: \ Target compilation primitives 06oct92py
198: \ included A! 16may93jaw
199:
200: : here ( -- there ) there ;
201: : allot ( n -- ) tdp +! ;
202: : , ( w -- ) T here H cell T allot ! H ;
203: : c, ( char -- ) T here 1 allot c! H ;
204: : align ( -- ) T here H align+ 0 ?DO bl T c, H LOOP ;
205:
206: : A! dup relon T ! H ;
207: : A, ( w -- ) T here H relon T , H ;
208:
209: >CROSS
210:
211: \ threading modell 13dec92py
212:
213: \ generic threading modell
214: : docol, ( -- ) :docol T A, 0 , H ;
215:
216: >TARGET
217: : >body ( cfa -- pfa ) T cell+ cell+ H ;
218: >CROSS
219:
1.3 pazsan 220: : dodoes, ( -- ) T :doesjump A, 0 , H ;
1.1 anton 221:
222: \ Ghost Builder 06oct92py
223:
224: \ <T T> new version with temp variable 10may93jaw
225:
226: VARIABLE VocTemp
227:
228: : <T get-current VocTemp ! also Ghosts definitions ;
229: : T> previous VocTemp @ set-current ;
230:
231: 4711 Constant <fwd> 4712 Constant <res>
232: 4713 Constant <imm>
233:
234: \ iForth makes only immediate directly after create
235: \ make atonce trick! ?
236:
237: Variable atonce atonce off
238:
239: : NoExec true ABORT" CROSS: Don't execute ghost" ;
240:
241: : GhostHeader <fwd> , 0 , ['] NoExec , ;
242:
243: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
244: : >end 3 cells + ;
245:
1.11 pazsan 246: Variable last-ghost
1.1 anton 247: : Make-Ghost ( "name" -- ghost )
248: >in @ GhostName swap >in !
249: <T Create atonce @ IF immediate atonce off THEN
250: here tuck swap ! ghostheader T>
1.11 pazsan 251: DOES> dup last-ghost ! >exec @ execute ;
1.1 anton 252:
253: \ ghost words 14oct92py
254: \ changed: 10may93py/jaw
255:
256: : gfind ( string -- ghost true/1 / string false )
257: \ searches for string in word-list ghosts
258: \ !! wouldn't it be simpler to just use search-wordlist ? ae
1.5 pazsan 259: dup count [ ' ghosts >body ] ALiteral search-wordlist
1.13 pazsan 260: dup IF >r >body nip r> THEN ;
1.1 anton 261:
262: VARIABLE Already
263:
264: : ghost ( "name" -- ghost )
265: Already off
1.13 pazsan 266: >in @ bl word gfind IF Already on nip EXIT THEN
1.1 anton 267: drop >in ! Make-Ghost ;
268:
269: \ resolve 14oct92py
270:
271: : resolve-loop ( ghost tcfa -- ghost tcfa )
272: >r dup >link @
273: BEGIN dup WHILE dup T @ H r@ rot T ! H REPEAT drop r> ;
274:
275: \ exists 9may93jaw
276:
277: : exists ( ghost tcfa -- )
278: over GhostNames
279: BEGIN @ dup
280: WHILE 2dup cell+ @ =
281: UNTIL
1.18 pazsan 282: 2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
1.1 anton 283: swap cell+ !
284: ELSE true ABORT" CROSS: Ghostnames inconsistent"
285: THEN ;
286:
287: : resolve ( ghost tcfa -- )
288: over >magic @ <fwd> <> IF exists EXIT THEN
289: resolve-loop over >link ! <res> swap >magic ! ;
290:
291: \ gexecute ghost, 01nov92py
292:
293: : do-forward ( ghost -- )
294: >link dup @ there rot ! T A, H ;
295: : do-resolve ( ghost -- )
296: >link @ T A, H ;
297:
298: : gexecute ( ghost -- ) dup @
299: <fwd> = IF do-forward ELSE do-resolve THEN ;
300: : ghost, ghost gexecute ;
301:
302: \ .unresolved 11may93jaw
303:
304: variable ResolveFlag
305:
306: \ ?touched 11may93jaw
307:
308: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
309: 0 <> and ;
310:
311: : ?resolved ( ghostname -- )
312: dup cell+ @ ?touched
313: IF cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
314:
315: >MINIMAL
316: : .unresolved ( -- )
317: ResolveFlag off cr ." Unresolved: "
318: Ghostnames
319: BEGIN @ dup
320: WHILE dup ?resolved
1.10 anton 321: REPEAT drop ResolveFlag @
322: IF
1.11 pazsan 323: abort" Unresolved words!"
1.10 anton 324: ELSE
325: ." Nothing!"
326: THEN
327: cr ;
1.1 anton 328:
329: >CROSS
330: \ Header states 12dec92py
331:
332: : flag! ( 8b -- ) tlast @ dup >r T c@ xor r> c! H ;
333:
334: VARIABLE ^imm
335:
336: >TARGET
337: : immediate 20 flag!
1.18 pazsan 338: ^imm @ @ dup <imm> = IF drop EXIT THEN
1.1 anton 339: <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
340: <imm> ^imm @ ! ;
1.8 pazsan 341: : restrict 40 flag! ;
1.1 anton 342: >CROSS
343:
344: \ ALIAS2 ansforth conform alias 9may93jaw
345:
346: : ALIAS2 create here 0 , DOES> @ execute ;
347: \ usage:
1.18 pazsan 348: \ ' <name> alias2 bla !
1.1 anton 349:
350: \ Target Header Creation 01nov92py
351:
352: : string, ( addr count -- )
353: dup T c, H bounds DO I c@ T c, H LOOP ;
1.13 pazsan 354: : name, ( "name" -- ) bl word count string, T align H ;
1.1 anton 355: : view, ( -- ) ( dummy ) ;
356:
357: VARIABLE CreateFlag CreateFlag off
358:
359: : (Theader ( "name" -- ghost ) T align H view,
360: tlast @ dup 0> IF T 1 cells - THEN A, H there tlast !
361: >in @ name, >in ! T here H tlastcfa !
362: CreateFlag @ IF
1.18 pazsan 363: >in @ alias2 swap >in ! \ create alias in target
364: >in @ ghost swap >in !
365: swap also ghosts ' previous swap ! \ tick ghost and store in alias
366: CreateFlag off
1.1 anton 367: ELSE ghost THEN
368: dup >magic ^imm ! \ a pointer for immediate
369: Already @ IF dup >end tdoes !
370: ELSE 0 tdoes ! THEN
371: 80 flag! ;
372:
373: VARIABLE ;Resolve 1 cells allot
374:
1.11 pazsan 375: : Theader ( "name" -- ghost )
376: (THeader dup there resolve 0 ;Resolve ! ;
1.1 anton 377:
378: >TARGET
379: : Alias ( cfa -- ) \ name
380: (THeader over resolve T A, H 80 flag! ;
381: >CROSS
382:
383: \ Conditionals and Comments 11may93jaw
384:
385: : ;Cond
386: postpone ;
387: swap ! ; immediate
388:
389: : Cond: ( -- ) \ name {code } ;
390: atonce on
391: ghost
392: >exec
393: :NONAME ;
394:
395: : restrict? ( -- )
396: \ aborts on interprete state - ae
397: state @ 0= ABORT" CROSS: Restricted" ;
398:
399: : Comment ( -- )
400: >in @ atonce on ghost swap >in ! ' swap >exec ! ;
401:
402: Comment ( Comment \
403:
404: \ Predefined ghosts 12dec92py
405:
406: ghost 0= drop
407: ghost branch ghost ?branch 2drop
408: ghost (do) ghost (?do) 2drop
409: ghost (for) drop
410: ghost (loop) ghost (+loop) 2drop
411: ghost (next) drop
1.2 pazsan 412: ghost unloop ghost ;S 2drop
1.1 anton 413: ghost lit ghost (compile) ghost ! 2drop drop
414: ghost (;code) ghost noop 2drop
415: ghost (.") ghost (S") ghost (ABORT") 2drop drop
1.9 pazsan 416: ghost '
1.1 anton 417:
418: \ compile 10may93jaw
419:
420: : compile ( -- ) \ name
421: restrict?
1.13 pazsan 422: bl word gfind dup 0= ABORT" CROSS: Can't compile "
1.1 anton 423: 0> ( immediate? )
424: IF >exec @ compile,
425: ELSE postpone literal postpone gexecute THEN ;
426: immediate
427:
428: >TARGET
1.13 pazsan 429: : ' ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
1.1 anton 430: dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
431:
432: Cond: ['] compile lit ghost gexecute ;Cond
1.14 anton 433:
434: Cond: chars ;Cond
1.1 anton 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
1.13 pazsan 468: BEGIN >in @ bl word
1.1 anton 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
1.6 anton 485:
486: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
1.2 pazsan 487:
1.1 anton 488: Cond: ; ( -- ) restrict?
489: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
490: ELSE true ABORT" CROSS: Stack empty" THEN
1.2 pazsan 491: compile ;S state off
1.1 anton 492: ;Resolve @
493: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
494: ;Cond
495: Cond: [ restrict? state off ;Cond
496:
497: >CROSS
498: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
499:
500: >TARGET
501: Cond: DOES> restrict?
502: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
503: ;Cond
504: : DOES> dodoes, T here H !does depth T ] H ;
505:
506: >CROSS
507: \ Creation 01nov92py
508:
509: \ Builder 11may93jaw
510:
511: : Builder ( Create do: "name" -- )
512: >in @ alias2 swap dup >in ! >r >r
513: Make-Ghost rot swap >exec ! ,
514: r> r> >in !
1.11 pazsan 515: also ghosts ' previous swap ! ;
516: \ DOES> dup >exec @ execute ;
1.1 anton 517:
518: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
519: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
1.4 pazsan 520: :dodoes T A, H gexecute T here H cell - reloff ;
1.1 anton 521:
1.11 pazsan 522: : TCreate ( -- )
523: last-ghost @
1.1 anton 524: CreateFlag on
1.11 pazsan 525: Theader >r dup gdoes,
526: >end @ >exec @ r> >exec ! ;
1.1 anton 527:
528: : Build: ( -- [xt] [colon-sys] )
529: :noname postpone TCreate ;
530:
531: : gdoes> ( ghost -- addr flag )
1.11 pazsan 532: last-ghost @
1.1 anton 533: state @ IF gexecute true EXIT THEN
534: cell+ @ T >body H false ;
535:
536: \ DO: ;DO 11may93jaw
537: \ changed to ?EXIT 10may93jaw
538:
539: : DO: ( -- addr [xt] [colon-sys] )
540: here ghostheader
1.11 pazsan 541: :noname postpone gdoes> postpone ?EXIT ;
1.1 anton 542:
543: : ;DO ( addr [xt] [colon-sys] -- )
544: postpone ; ( S addr xt )
545: over >exec ! ; immediate
546:
547: : by ( -- addr ) \ Name
548: ghost >end @ ;
549:
550: >TARGET
551: \ Variables and Constants 05dec92py
552:
553: Build: ;
554: DO: ( ghost -- addr ) ;DO
555: Builder Create
556: by Create :dovar resolve
557:
558: Build: T 0 , H ;
559: by Create
560: Builder Variable
561:
562: Build: T 0 A, H ;
563: by Create
564: Builder AVariable
565:
1.3 pazsan 566: \ User variables 04may94py
567:
568: >CROSS
569: Variable tup 0 tup !
570: Variable tudp 0 tudp !
571: : u, ( n -- udp )
572: tup @ tudp @ + T ! H
1.19 ! pazsan 573: tudp @ dup T cell+ H tudp ! ;
1.3 pazsan 574: : au, ( n -- udp )
575: tup @ tudp @ + T A! H
1.19 ! pazsan 576: tudp @ dup T cell+ H tudp ! ;
1.3 pazsan 577: >TARGET
578:
579: Build: T 0 u, , H ;
580: DO: ( ghost -- up-addr ) T @ H tup @ + ;DO
1.1 anton 581: Builder User
1.3 pazsan 582: by User :douser resolve
1.1 anton 583:
1.3 pazsan 584: Build: T 0 u, , 0 u, drop H ;
585: by User
1.1 anton 586: Builder 2User
587:
1.3 pazsan 588: Build: T 0 au, , H ;
589: by User
1.1 anton 590: Builder AUser
591:
592: Build: ( n -- ) T , H ;
593: DO: ( ghost -- n ) T @ H ;DO
594: Builder Constant
595: by Constant :docon resolve
596:
597: Build: ( n -- ) T A, H ;
598: by Constant
599: Builder AConstant
600:
601: Build: T 0 , H ;
602: by Constant
603: Builder Value
604:
605: Build: ( -- ) compile noop ;
606: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
607: Builder Defer
1.10 anton 608: by Defer :dodefer resolve
1.1 anton 609:
610: \ structural conditionals 17dec92py
611:
612: >CROSS
613: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
614: : sys? ( sys -- sys ) dup 0= ?struc ;
615: : >mark ( -- sys ) T here 0 , H ;
616: : >resolve ( sys -- ) T here over - swap ! H ;
617: : <resolve ( sys -- ) T here - , H ;
618: >TARGET
619:
620: \ Structural Conditionals 12dec92py
621:
622: Cond: BUT restrict? sys? swap ;Cond
623: Cond: YET restrict? sys? dup ;Cond
624:
625: >CROSS
626: Variable tleavings
627: >TARGET
628:
629: Cond: DONE ( addr -- ) restrict? tleavings @
630: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
631: tleavings ! drop ;Cond
632:
633: >CROSS
634: : (leave T here H tleavings @ T , H tleavings ! ;
635: >TARGET
636:
637: Cond: LEAVE restrict? compile branch (leave ;Cond
638: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
639:
640: \ Structural Conditionals 12dec92py
641:
642: Cond: AHEAD restrict? compile branch >mark ;Cond
643: Cond: IF restrict? compile ?branch >mark ;Cond
644: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
645: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
646:
647: Cond: BEGIN restrict? T here H ;Cond
648: Cond: WHILE restrict? sys? compile IF swap ;Cond
649: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
650: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
651: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
652:
653: \ Structural Conditionals 12dec92py
654:
655: Cond: DO restrict? compile (do) T here H ;Cond
656: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
657: Cond: FOR restrict? compile (for) T here H ;Cond
658:
659: >CROSS
660: : loop] dup <resolve cell - compile DONE compile unloop ;
661: >TARGET
662:
663: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
664: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
665: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
666:
667: \ String words 23feb93py
668:
669: : ," [char] " parse string, T align H ;
670:
671: Cond: ." restrict? compile (.") T ," H ;Cond
672: Cond: S" restrict? compile (S") T ," H ;Cond
673: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
674:
675: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
676: : IS T ' >body ! H ;
1.9 pazsan 677: Cond: TO T ' >body H compile ALiteral compile ! ;Cond
678: : TO T ' >body ! H ;
1.1 anton 679:
680: \ LINKED ERR" ENV" 2ENV" 18may93jaw
681:
682: \ linked list primitive
683: : linked T here over @ A, swap ! H ;
684:
685: : err" s" ErrLink linked" evaluate T , H
686: [char] " parse string, T align H ;
687:
688: : env" [char] " parse s" EnvLink linked" evaluate
689: string, T align , H ;
690:
691: : 2env" [char] " parse s" EnvLink linked" evaluate
692: here >r string, T align , , H
693: r> dup T c@ H 80 and swap T c! H ;
694:
695: \ compile must be last 22feb93py
696:
697: Cond: compile ( -- ) restrict? \ name
1.13 pazsan 698: bl word gfind dup 0= ABORT" CROSS: Can't compile"
1.1 anton 699: 0> IF gexecute
700: ELSE dup >magic @ <imm> =
701: IF gexecute
702: ELSE compile (compile) gexecute THEN THEN ;Cond
703:
704: Cond: postpone ( -- ) restrict? \ name
1.13 pazsan 705: bl word gfind dup 0= ABORT" CROSS: Can't compile"
1.1 anton 706: 0> IF gexecute
707: ELSE dup >magic @ <imm> =
708: IF gexecute
709: ELSE compile (compile) gexecute THEN THEN ;Cond
710:
711: >MINIMAL
712: also minimal
713: \ Usefull words 13feb93py
714:
715: : KB 400 * ;
716:
717: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
718:
1.13 pazsan 719: : there? bl word gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
1.1 anton 720:
721: : [IFDEF] there? postpone [IF] ;
722: : [IFUNDEF] there? 0= postpone [IF] ;
723:
724: \ C: \- \+ Conditional Compiling 09jun93jaw
725:
726: : C: >in @ there? 0=
727: IF >in ! T : H
728: ELSE drop
729: BEGIN bl word dup c@
730: IF count comment? s" ;" compare 0= ?EXIT
731: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
732: THEN
733: AGAIN
734: THEN ;
735:
736: also minimal
737:
738: : \- there? IF postpone \ THEN ;
739: : \+ there? 0= IF postpone \ THEN ;
740:
741: : [IF] postpone [IF] ;
742: : [THEN] postpone [THEN] ;
743: : [ELSE] postpone [ELSE] ;
744:
745: Cond: [IF] [IF] ;Cond
746: Cond: [IFDEF] [IFDEF] ;Cond
747: Cond: [IFUNDEF] [IFUNDEF] ;Cond
748: Cond: [THEN] [THEN] ;Cond
749: Cond: [ELSE] [ELSE] ;Cond
750:
751: \ save-cross 17mar93py
752:
753: \ i'm not interested in bigforth features this time 10may93jaw
754: \ [IFDEF] file
755: \ also file
756: \ [THEN]
757: \ included throw after create-file 11may93jaw
758:
1.12 anton 759: bigendian Constant bigendian
1.1 anton 760:
761: : save-cross ( "name" -- )
762: bl parse ." Saving to " 2dup type
763: w/o bin create-file throw >r
1.16 pazsan 764: s" gforth00" r@ write-file throw \ write magic
765: image @ there r@ write-file throw \ write image
766: bit$ @ there 1- cell>bit rshift 1+
767: r@ write-file throw \ write tags
1.1 anton 768: r> close-file throw ;
769:
770: \ words that should be in minimal
771:
772: : + + ; : 1- 1- ;
773: : - - ; : 2* 2* ;
1.11 pazsan 774: : * * ; : / / ;
1.1 anton 775: : dup dup ; : over over ;
776: : swap swap ; : rot rot ;
1.19 ! pazsan 777: : drop drop ; : = = ;
1.13 pazsan 778: : lshift lshift ; : 2/ 2/ ;
1.19 ! pazsan 779: : . . ;
1.13 pazsan 780: cell constant cell
1.1 anton 781:
782: \ include bug5.fs
783: \ only forth also minimal definitions
784:
785: : \ postpone \ ;
786: : ( postpone ( ;
787: : include bl word count included ;
788: : .( [char] ) parse type ;
789: : cr cr ;
790:
791: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
792: only forth also minimal definitions
793:
794: \ cross-compiler words
795:
796: : decimal decimal ;
797: : hex hex ;
798:
1.3 pazsan 799: : tudp T tudp H ;
800: : tup T tup H ; minimal
1.1 anton 801:
802: \ for debugging...
803: : order order ;
804: : words words ;
805: : .s .s ;
806:
807: : bye bye ;
808:
809: \ turnkey direction
810: : H forth ; immediate
811: : T minimal ; immediate
812: : G ghosts ; immediate
813:
814: : turnkey 0 set-order also Target definitions
815: also Minimal also ;
816:
817: \ these ones are pefered:
818:
819: : lock turnkey ;
820: : unlock forth also cross ;
821:
822: unlock definitions also minimal
823: : lock lock ;
824: lock
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