Annotation of gforth/cross.fs, revision 1.25
1.1 anton 1: \ CROSS.FS The Cross-Compiler 06oct92py
1.23 pazsan 2: \ $Id: cross.fs,v 1.22 1995/02/06 18:14:30 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:
1.23 pazsan 26: : string, ( c-addr u -- )
27: \ puts down string as cstring
28: dup c, here swap chars dup allot move ;
29: ' falign Alias cfalign
1.5 pazsan 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:
1.1 anton 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 )
1.22 anton 46: here GhostNames @ , GhostNames ! here 0 ,
47: bl word count
48: \ 2dup type space
49: string, cfalign ;
1.1 anton 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:
1.13 pazsan 91: included
1.1 anton 92:
1.19 pazsan 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:
1.1 anton 104: >TARGET
105:
106: \ Byte ordering and cell size 06oct92py
107:
1.19 pazsan 108: : cell+ tcell + ;
109: : cells tcell<< lshift ;
1.1 anton 110: : chars ;
1.19 pazsan 111: : floats tfloat * ;
1.6 anton 112:
1.1 anton 113: >CROSS
1.19 pazsan 114: : cell/ tcell<< rshift ;
1.1 anton 115: >TARGET
116: 20 CONSTANT bl
117: -1 Constant NIL
118: -2 Constant :docol
119: -3 Constant :docon
120: -4 Constant :dovar
1.3 pazsan 121: -5 Constant :douser
1.10 anton 122: -6 Constant :dodefer
1.24 pazsan 123: -7 Constant :dostruc
124: -8 Constant :dodoes
125: -9 Constant :doesjump
1.1 anton 126:
127: >CROSS
128:
1.20 pazsan 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 ;
1.19 pazsan 135: [ELSE]
1.20 pazsan 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 ;
1.1 anton 140: [THEN]
141:
142: \ Memory initialisation 05dec92py
143: \ Fixed bug in else part 11may93jaw
144:
145: [IFDEF] Memory \ Memory is a bigFORTH feature
1.5 pazsan 146: also Memory
1.1 anton 147: : initmem ( var len -- )
148: 2dup swap handle! >r @ r> erase ;
1.5 pazsan 149: toss
1.1 anton 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! ;
1.4 pazsan 172: : -bit ( addr n -- ) >bit invert over c@ and swap c! ;
1.1 anton 173: : relon ( taddr -- ) bit$ @ swap cell/ +bit ;
1.4 pazsan 174: : reloff ( taddr -- ) bit$ @ swap cell/ -bit ;
1.1 anton 175:
176: \ Target memory access 06oct92py
177:
178: : align+ ( taddr -- rest )
179: cell tuck 1- and - [ cell 1- ] Literal and ;
1.22 anton 180: : cfalign+ ( taddr -- rest )
181: \ see kernal.fs:cfaligned
182: float tuck 1- and - [ float 1- ] Literal and ;
1.1 anton 183:
184: >TARGET
185: : aligned ( taddr -- ta-addr ) dup align+ + ;
186: \ assumes cell alignment granularity (as GNU C)
187:
1.22 anton 188: : cfaligned ( taddr1 -- taddr2 )
189: \ see kernal.fs
190: dup cfalign+ + ;
191:
1.1 anton 192: >CROSS
193: : >image ( taddr -- absaddr ) image @ + ;
194: >TARGET
1.19 pazsan 195: : @ ( taddr -- w ) >image t@ ;
196: : ! ( w taddr -- ) >image t! ;
1.1 anton 197: : c@ ( taddr -- char ) >image c@ ;
198: : c! ( char taddr -- ) >image c! ;
1.7 anton 199: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
200: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
1.1 anton 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 ;
1.22 anton 210: : cfalign ( -- )
211: T here H cfalign+ 0 ?DO bl T c, H LOOP ;
1.1 anton 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:
1.3 pazsan 227: : dodoes, ( -- ) T :doesjump A, 0 , H ;
1.1 anton 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:
1.11 pazsan 253: Variable last-ghost
1.1 anton 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>
1.11 pazsan 258: DOES> dup last-ghost ! >exec @ execute ;
1.1 anton 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
1.5 pazsan 266: dup count [ ' ghosts >body ] ALiteral search-wordlist
1.13 pazsan 267: dup IF >r >body nip r> THEN ;
1.1 anton 268:
269: VARIABLE Already
270:
271: : ghost ( "name" -- ghost )
272: Already off
1.13 pazsan 273: >in @ bl word gfind IF Already on nip EXIT THEN
1.1 anton 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
1.18 pazsan 289: 2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
1.1 anton 290: swap cell+ !
1.24 pazsan 291: ELSE true abort" CROSS: Ghostnames inconsistent "
1.1 anton 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
1.10 anton 328: REPEAT drop ResolveFlag @
329: IF
1.11 pazsan 330: abort" Unresolved words!"
1.10 anton 331: ELSE
332: ." Nothing!"
333: THEN
334: cr ;
1.1 anton 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!
1.18 pazsan 345: ^imm @ @ dup <imm> = IF drop EXIT THEN
1.1 anton 346: <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
347: <imm> ^imm @ ! ;
1.8 pazsan 348: : restrict 40 flag! ;
1.1 anton 349: >CROSS
350:
351: \ ALIAS2 ansforth conform alias 9may93jaw
352:
353: : ALIAS2 create here 0 , DOES> @ execute ;
354: \ usage:
1.18 pazsan 355: \ ' <name> alias2 bla !
1.1 anton 356:
357: \ Target Header Creation 01nov92py
358:
359: : string, ( addr count -- )
360: dup T c, H bounds DO I c@ T c, H LOOP ;
1.22 anton 361: : name, ( "name" -- ) bl word count string, T cfalign H ;
1.1 anton 362: : view, ( -- ) ( dummy ) ;
363:
1.25 ! pazsan 364: \ Target Document Creation (goes to crossdoc.fd) 05jul95py
! 365:
! 366: s" crossdoc.fd" r/w create-file throw value doc-file-id
! 367: \ contains the file-id of the documentation file
! 368:
! 369: : \G ( -- )
! 370: source >in @ /string doc-file-id write-line throw
! 371: source >in ! drop ; immediate
! 372:
! 373: Variable to-doc
! 374:
! 375: : cross-doc-entry ( -- )
! 376: to-doc @ tlast @ 0<> and \ not an anonymous (i.e. noname) header
! 377: IF
! 378: s" " doc-file-id write-line throw
! 379: s" make-doc " doc-file-id write-file throw
! 380: tlast @ >image count $1F and doc-file-id write-file throw
! 381: >in @
! 382: [char] ( parse 2drop
! 383: [char] ) parse doc-file-id write-file throw
! 384: s" )" doc-file-id write-file throw
! 385: [char] \ parse 2drop
! 386: POSTPONE \g
! 387: >in !
! 388: THEN to-doc on ;
! 389:
1.1 anton 390: VARIABLE CreateFlag CreateFlag off
391:
392: : (Theader ( "name" -- ghost ) T align H view,
393: tlast @ dup 0> IF T 1 cells - THEN A, H there tlast !
394: >in @ name, >in ! T here H tlastcfa !
395: CreateFlag @ IF
1.18 pazsan 396: >in @ alias2 swap >in ! \ create alias in target
397: >in @ ghost swap >in !
398: swap also ghosts ' previous swap ! \ tick ghost and store in alias
399: CreateFlag off
1.1 anton 400: ELSE ghost THEN
401: dup >magic ^imm ! \ a pointer for immediate
402: Already @ IF dup >end tdoes !
403: ELSE 0 tdoes ! THEN
1.25 ! pazsan 404: 80 flag!
! 405: cross-doc-entry ;
1.1 anton 406:
407: VARIABLE ;Resolve 1 cells allot
408:
1.11 pazsan 409: : Theader ( "name" -- ghost )
410: (THeader dup there resolve 0 ;Resolve ! ;
1.1 anton 411:
412: >TARGET
413: : Alias ( cfa -- ) \ name
1.25 ! pazsan 414: dup 0< IF to-doc off THEN
1.1 anton 415: (THeader over resolve T A, H 80 flag! ;
416: >CROSS
417:
418: \ Conditionals and Comments 11may93jaw
419:
420: : ;Cond
421: postpone ;
422: swap ! ; immediate
423:
424: : Cond: ( -- ) \ name {code } ;
425: atonce on
426: ghost
427: >exec
428: :NONAME ;
429:
430: : restrict? ( -- )
431: \ aborts on interprete state - ae
432: state @ 0= ABORT" CROSS: Restricted" ;
433:
434: : Comment ( -- )
435: >in @ atonce on ghost swap >in ! ' swap >exec ! ;
436:
437: Comment ( Comment \
438:
439: \ Predefined ghosts 12dec92py
440:
441: ghost 0= drop
442: ghost branch ghost ?branch 2drop
443: ghost (do) ghost (?do) 2drop
444: ghost (for) drop
445: ghost (loop) ghost (+loop) 2drop
446: ghost (next) drop
1.2 pazsan 447: ghost unloop ghost ;S 2drop
1.1 anton 448: ghost lit ghost (compile) ghost ! 2drop drop
449: ghost (;code) ghost noop 2drop
450: ghost (.") ghost (S") ghost (ABORT") 2drop drop
1.9 pazsan 451: ghost '
1.1 anton 452:
453: \ compile 10may93jaw
454:
455: : compile ( -- ) \ name
456: restrict?
1.13 pazsan 457: bl word gfind dup 0= ABORT" CROSS: Can't compile "
1.1 anton 458: 0> ( immediate? )
459: IF >exec @ compile,
460: ELSE postpone literal postpone gexecute THEN ;
461: immediate
462:
463: >TARGET
1.13 pazsan 464: : ' ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
1.1 anton 465: dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
466:
467: Cond: ['] compile lit ghost gexecute ;Cond
1.14 anton 468:
469: Cond: chars ;Cond
1.1 anton 470:
471: >CROSS
472: \ tLiteral 12dec92py
473:
474: : lit, ( n -- ) compile lit T , H ;
475: : alit, ( n -- ) compile lit T A, H ;
476:
477: >TARGET
478: Cond: Literal ( n -- ) restrict? lit, ;Cond
479: Cond: ALiteral ( n -- ) restrict? alit, ;Cond
480:
481: : Char ( "<char>" -- ) bl word char+ c@ ;
482: Cond: [Char] ( "<char>" -- ) restrict? Char lit, ;Cond
483:
484: >CROSS
485: \ Target compiling loop 12dec92py
486: \ ">tib trick thrown out 10may93jaw
487: \ number? defined at the top 11may93jaw
488:
489: \ compiled word might leave items on stack!
490: : tcom ( in name -- )
491: gfind ?dup IF 0> IF nip >exec @ execute
492: ELSE nip gexecute THEN EXIT THEN
493: number? dup IF 0> IF swap lit, THEN lit, drop
494: ELSE 2drop >in !
495: ghost gexecute THEN ;
496:
497: >TARGET
498: \ : ; DOES> 13dec92py
499: \ ] 9may93py/jaw
500:
501: : ] state on
502: BEGIN
1.13 pazsan 503: BEGIN >in @ bl word
1.1 anton 504: dup c@ 0= WHILE 2drop refill 0=
505: ABORT" CROSS: End of file while target compiling"
506: REPEAT
507: tcom
508: state @
509: 0=
510: UNTIL ;
511:
512: \ by the way: defining a second interpreter (a compiler-)loop
513: \ is not allowed if a system should be ans conform
514:
515: : : ( -- colon-sys ) \ Name
516: (THeader ;Resolve ! there ;Resolve cell+ !
517: docol, depth T ] H ;
518:
1.2 pazsan 519: Cond: EXIT ( -- ) restrict? compile ;S ;Cond
1.6 anton 520:
521: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
1.2 pazsan 522:
1.1 anton 523: Cond: ; ( -- ) restrict?
524: depth ?dup IF 1- <> ABORT" CROSS: Stack changed"
525: ELSE true ABORT" CROSS: Stack empty" THEN
1.2 pazsan 526: compile ;S state off
1.1 anton 527: ;Resolve @
528: IF ;Resolve @ ;Resolve cell+ @ resolve THEN
529: ;Cond
530: Cond: [ restrict? state off ;Cond
531:
532: >CROSS
533: : !does :dodoes tlastcfa @ tuck T ! cell+ ! H ;
534:
535: >TARGET
536: Cond: DOES> restrict?
537: compile (;code) dodoes, tdoes @ ?dup IF @ T here H resolve THEN
538: ;Cond
539: : DOES> dodoes, T here H !does depth T ] H ;
540:
541: >CROSS
542: \ Creation 01nov92py
543:
544: \ Builder 11may93jaw
545:
546: : Builder ( Create do: "name" -- )
547: >in @ alias2 swap dup >in ! >r >r
548: Make-Ghost rot swap >exec ! ,
549: r> r> >in !
1.11 pazsan 550: also ghosts ' previous swap ! ;
551: \ DOES> dup >exec @ execute ;
1.1 anton 552:
553: : gdoes, ( ghost -- ) >end @ dup >magic @ <fwd> <>
554: IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
1.4 pazsan 555: :dodoes T A, H gexecute T here H cell - reloff ;
1.1 anton 556:
1.11 pazsan 557: : TCreate ( -- )
558: last-ghost @
1.1 anton 559: CreateFlag on
1.11 pazsan 560: Theader >r dup gdoes,
561: >end @ >exec @ r> >exec ! ;
1.1 anton 562:
563: : Build: ( -- [xt] [colon-sys] )
564: :noname postpone TCreate ;
565:
566: : gdoes> ( ghost -- addr flag )
1.11 pazsan 567: last-ghost @
1.1 anton 568: state @ IF gexecute true EXIT THEN
569: cell+ @ T >body H false ;
570:
571: \ DO: ;DO 11may93jaw
572: \ changed to ?EXIT 10may93jaw
573:
574: : DO: ( -- addr [xt] [colon-sys] )
575: here ghostheader
1.11 pazsan 576: :noname postpone gdoes> postpone ?EXIT ;
1.1 anton 577:
578: : ;DO ( addr [xt] [colon-sys] -- )
579: postpone ; ( S addr xt )
580: over >exec ! ; immediate
581:
582: : by ( -- addr ) \ Name
583: ghost >end @ ;
584:
585: >TARGET
586: \ Variables and Constants 05dec92py
587:
588: Build: ;
589: DO: ( ghost -- addr ) ;DO
590: Builder Create
591: by Create :dovar resolve
592:
593: Build: T 0 , H ;
594: by Create
595: Builder Variable
596:
597: Build: T 0 A, H ;
598: by Create
599: Builder AVariable
600:
1.3 pazsan 601: \ User variables 04may94py
602:
603: >CROSS
604: Variable tup 0 tup !
605: Variable tudp 0 tudp !
606: : u, ( n -- udp )
607: tup @ tudp @ + T ! H
1.19 pazsan 608: tudp @ dup T cell+ H tudp ! ;
1.3 pazsan 609: : au, ( n -- udp )
610: tup @ tudp @ + T A! H
1.19 pazsan 611: tudp @ dup T cell+ H tudp ! ;
1.3 pazsan 612: >TARGET
613:
614: Build: T 0 u, , H ;
615: DO: ( ghost -- up-addr ) T @ H tup @ + ;DO
1.1 anton 616: Builder User
1.3 pazsan 617: by User :douser resolve
1.1 anton 618:
1.3 pazsan 619: Build: T 0 u, , 0 u, drop H ;
620: by User
1.1 anton 621: Builder 2User
622:
1.3 pazsan 623: Build: T 0 au, , H ;
624: by User
1.1 anton 625: Builder AUser
626:
627: Build: ( n -- ) T , H ;
628: DO: ( ghost -- n ) T @ H ;DO
629: Builder Constant
630: by Constant :docon resolve
631:
632: Build: ( n -- ) T A, H ;
633: by Constant
634: Builder AConstant
635:
1.24 pazsan 636: Build: ( d -- ) T , , H ;
637: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
638: Builder 2Constant
639:
1.1 anton 640: Build: T 0 , H ;
641: by Constant
642: Builder Value
643:
644: Build: ( -- ) compile noop ;
645: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
646: Builder Defer
1.10 anton 647: by Defer :dodefer resolve
1.24 pazsan 648:
649: \ Sturctures 23feb95py
650:
651: >CROSS
652: : nalign ( addr1 n -- addr2 )
653: \ addr2 is the aligned version of addr1 wrt the alignment size n
654: 1- tuck + swap invert and ;
655: >TARGET
656:
657: Build: >r rot r@ nalign dup T , H ( align1 size offset )
658: + swap r> nalign ;
659: DO: T @ H + ;DO
660: Builder Field
661: by Field :dostruc resolve
662:
663: : struct T 0 1 chars H ;
664: : end-struct T 2Constant H ;
665:
666: : cells: ( n -- size align )
667: T cells 1 cells H ;
668:
669: \ ' 2Constant Alias2 end-struct
670: \ 0 1 T Chars H 2Constant struct
1.1 anton 671:
672: \ structural conditionals 17dec92py
673:
674: >CROSS
675: : ?struc ( flag -- ) ABORT" CROSS: unstructured " ;
676: : sys? ( sys -- sys ) dup 0= ?struc ;
677: : >mark ( -- sys ) T here 0 , H ;
678: : >resolve ( sys -- ) T here over - swap ! H ;
679: : <resolve ( sys -- ) T here - , H ;
680: >TARGET
681:
682: \ Structural Conditionals 12dec92py
683:
684: Cond: BUT restrict? sys? swap ;Cond
685: Cond: YET restrict? sys? dup ;Cond
686:
687: >CROSS
688: Variable tleavings
689: >TARGET
690:
691: Cond: DONE ( addr -- ) restrict? tleavings @
692: BEGIN 2dup u> 0= WHILE dup T @ H swap >resolve REPEAT
693: tleavings ! drop ;Cond
694:
695: >CROSS
696: : (leave T here H tleavings @ T , H tleavings ! ;
697: >TARGET
698:
699: Cond: LEAVE restrict? compile branch (leave ;Cond
700: Cond: ?LEAVE restrict? compile 0= compile ?branch (leave ;Cond
701:
702: \ Structural Conditionals 12dec92py
703:
704: Cond: AHEAD restrict? compile branch >mark ;Cond
705: Cond: IF restrict? compile ?branch >mark ;Cond
706: Cond: THEN restrict? sys? dup T @ H ?struc >resolve ;Cond
707: Cond: ELSE restrict? sys? compile AHEAD swap compile THEN ;Cond
708:
709: Cond: BEGIN restrict? T here H ;Cond
710: Cond: WHILE restrict? sys? compile IF swap ;Cond
711: Cond: AGAIN restrict? sys? compile branch <resolve ;Cond
712: Cond: UNTIL restrict? sys? compile ?branch <resolve ;Cond
713: Cond: REPEAT restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
714:
715: \ Structural Conditionals 12dec92py
716:
717: Cond: DO restrict? compile (do) T here H ;Cond
718: Cond: ?DO restrict? compile (?do) (leave T here H ;Cond
719: Cond: FOR restrict? compile (for) T here H ;Cond
720:
721: >CROSS
722: : loop] dup <resolve cell - compile DONE compile unloop ;
723: >TARGET
724:
725: Cond: LOOP restrict? sys? compile (loop) loop] ;Cond
726: Cond: +LOOP restrict? sys? compile (+loop) loop] ;Cond
727: Cond: NEXT restrict? sys? compile (next) loop] ;Cond
728:
729: \ String words 23feb93py
730:
731: : ," [char] " parse string, T align H ;
732:
733: Cond: ." restrict? compile (.") T ," H ;Cond
734: Cond: S" restrict? compile (S") T ," H ;Cond
735: Cond: ABORT" restrict? compile (ABORT") T ," H ;Cond
736:
737: Cond: IS T ' >body H compile ALiteral compile ! ;Cond
738: : IS T ' >body ! H ;
1.9 pazsan 739: Cond: TO T ' >body H compile ALiteral compile ! ;Cond
740: : TO T ' >body ! H ;
1.1 anton 741:
742: \ LINKED ERR" ENV" 2ENV" 18may93jaw
743:
744: \ linked list primitive
745: : linked T here over @ A, swap ! H ;
746:
747: : err" s" ErrLink linked" evaluate T , H
748: [char] " parse string, T align H ;
749:
750: : env" [char] " parse s" EnvLink linked" evaluate
751: string, T align , H ;
752:
753: : 2env" [char] " parse s" EnvLink linked" evaluate
754: here >r string, T align , , H
755: r> dup T c@ H 80 and swap T c! H ;
756:
757: \ compile must be last 22feb93py
758:
759: Cond: compile ( -- ) restrict? \ name
1.13 pazsan 760: bl word gfind dup 0= ABORT" CROSS: Can't compile"
1.1 anton 761: 0> IF gexecute
762: ELSE dup >magic @ <imm> =
763: IF gexecute
764: ELSE compile (compile) gexecute THEN THEN ;Cond
765:
766: Cond: postpone ( -- ) restrict? \ name
1.13 pazsan 767: bl word gfind dup 0= ABORT" CROSS: Can't compile"
1.1 anton 768: 0> IF gexecute
769: ELSE dup >magic @ <imm> =
770: IF gexecute
771: ELSE compile (compile) gexecute THEN THEN ;Cond
772:
773: >MINIMAL
774: also minimal
775: \ Usefull words 13feb93py
776:
777: : KB 400 * ;
778:
779: \ define new [IFDEF] and [IFUNDEF] 20may93jaw
780:
1.13 pazsan 781: : there? bl word gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
1.1 anton 782:
783: : [IFDEF] there? postpone [IF] ;
784: : [IFUNDEF] there? 0= postpone [IF] ;
785:
786: \ C: \- \+ Conditional Compiling 09jun93jaw
787:
788: : C: >in @ there? 0=
789: IF >in ! T : H
790: ELSE drop
791: BEGIN bl word dup c@
792: IF count comment? s" ;" compare 0= ?EXIT
793: ELSE refill 0= ABORT" CROSS: Out of Input while C:"
794: THEN
795: AGAIN
796: THEN ;
797:
798: also minimal
799:
800: : \- there? IF postpone \ THEN ;
801: : \+ there? 0= IF postpone \ THEN ;
802:
803: : [IF] postpone [IF] ;
804: : [THEN] postpone [THEN] ;
805: : [ELSE] postpone [ELSE] ;
806:
807: Cond: [IF] [IF] ;Cond
808: Cond: [IFDEF] [IFDEF] ;Cond
809: Cond: [IFUNDEF] [IFUNDEF] ;Cond
810: Cond: [THEN] [THEN] ;Cond
811: Cond: [ELSE] [ELSE] ;Cond
812:
813: \ save-cross 17mar93py
814:
815: \ i'm not interested in bigforth features this time 10may93jaw
816: \ [IFDEF] file
817: \ also file
818: \ [THEN]
819: \ included throw after create-file 11may93jaw
820:
1.12 anton 821: bigendian Constant bigendian
1.1 anton 822:
823: : save-cross ( "name" -- )
824: bl parse ." Saving to " 2dup type
825: w/o bin create-file throw >r
1.16 pazsan 826: s" gforth00" r@ write-file throw \ write magic
827: image @ there r@ write-file throw \ write image
828: bit$ @ there 1- cell>bit rshift 1+
829: r@ write-file throw \ write tags
1.1 anton 830: r> close-file throw ;
831:
832: \ words that should be in minimal
833:
834: : + + ; : 1- 1- ;
835: : - - ; : 2* 2* ;
1.11 pazsan 836: : * * ; : / / ;
1.1 anton 837: : dup dup ; : over over ;
838: : swap swap ; : rot rot ;
1.19 pazsan 839: : drop drop ; : = = ;
1.13 pazsan 840: : lshift lshift ; : 2/ 2/ ;
1.19 pazsan 841: : . . ;
1.13 pazsan 842: cell constant cell
1.1 anton 843:
844: \ include bug5.fs
845: \ only forth also minimal definitions
846:
1.25 ! pazsan 847: : \ postpone \ ;
! 848: : \G postpone \G ;
! 849: : ( postpone ( ;
1.1 anton 850: : include bl word count included ;
851: : .( [char] ) parse type ;
852: : cr cr ;
853:
854: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
855: only forth also minimal definitions
856:
857: \ cross-compiler words
858:
859: : decimal decimal ;
860: : hex hex ;
861:
1.3 pazsan 862: : tudp T tudp H ;
863: : tup T tup H ; minimal
1.1 anton 864:
865: \ for debugging...
866: : order order ;
867: : words words ;
868: : .s .s ;
869:
870: : bye bye ;
871:
872: \ turnkey direction
873: : H forth ; immediate
874: : T minimal ; immediate
875: : G ghosts ; immediate
876:
877: : turnkey 0 set-order also Target definitions
878: also Minimal also ;
879:
880: \ these ones are pefered:
881:
882: : lock turnkey ;
883: : unlock forth also cross ;
884:
885: unlock definitions also minimal
886: : lock lock ;
887: lock
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