File:  [gforth] / gforth / cross.fs
Revision 1.33: download - view: text, annotated - select for diffs
Sat Dec 23 16:21:56 1995 UTC (23 years, 11 months ago) by anton
Branches: MAIN
CVS tags: HEAD
Improved etags support
prims2x now supports synclines ("#line ...")
improved strsignal replacement

    1: \ CROSS.FS     The Cross-Compiler                      06oct92py
    2: \ Idea and implementation: Bernd Paysan (py)
    3: 
    4: \ Copyright (C) 1995 Free Software Foundation, Inc.
    5: 
    6: \ This file is part of Gforth.
    7: 
    8: \ Gforth is free software; you can redistribute it and/or
    9: \ modify it under the terms of the GNU General Public License
   10: \ as published by the Free Software Foundation; either version 2
   11: \ of the License, or (at your option) any later version.
   12: 
   13: \ This program is distributed in the hope that it will be useful,
   14: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   15: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   16: \ GNU General Public License for more details.
   17: 
   18: \ You should have received a copy of the GNU General Public License
   19: \ along with this program; if not, write to the Free Software
   20: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   21: 
   22: \ Log:
   23: \       changed in ; [ to state off           12may93jaw
   24: \       included place +place                 12may93jaw
   25: \       for a created word (variable, constant...)
   26: \       is now an alias in the target voabulary.
   27: \       this means it is no longer necessary to
   28: \       switch between vocabularies for variable
   29: \       initialization                        12may93jaw
   30: \       discovered error in DOES>
   31: \       replaced !does with (;code)           16may93jaw
   32: \       made complete redesign and
   33: \       introduced two vocs method
   34: \       to be asure that the right words
   35: \       are found                             08jun93jaw
   36: \       btw:  ! works not with 16 bit
   37: \             targets                         09jun93jaw
   38: \       added: 2user and value                11jun93jaw
   39: 
   40: \ include other.fs       \ ansforth extentions for cross
   41: 
   42: : string, ( c-addr u -- )
   43:     \ puts down string as cstring
   44:     dup c, here swap chars dup allot move ;
   45: ' falign Alias cfalign
   46: : comment? ( c-addr u -- c-addr u )
   47:         2dup s" (" compare 0=
   48:         IF    postpone (
   49:         ELSE  2dup s" \" compare 0= IF postpone \ THEN
   50:         THEN ;
   51: 
   52: decimal
   53: 
   54: \ Begin CROSS COMPILER:
   55: 
   56: \ GhostNames                                            9may93jaw
   57: \ second name source to search trough list
   58: 
   59: VARIABLE GhostNames
   60: 0 GhostNames !
   61: : GhostName ( -- addr )
   62:     here GhostNames @ , GhostNames ! here 0 ,
   63:     bl word count
   64:     \ 2dup type space
   65:     string, cfalign ;
   66: 
   67: hex
   68: 
   69: 
   70: Vocabulary Cross
   71: Vocabulary Target
   72: Vocabulary Ghosts
   73: VOCABULARY Minimal
   74: only Forth also Target also also
   75: definitions Forth
   76: 
   77: : T  previous Cross also Target ; immediate
   78: : G  Ghosts ; immediate
   79: : H  previous Forth also Cross ; immediate
   80: 
   81: forth definitions
   82: 
   83: : T  previous Cross also Target ; immediate
   84: : G  Ghosts ; immediate
   85: 
   86: : >cross  also Cross definitions previous ;
   87: : >target also Target definitions previous ;
   88: : >minimal also Minimal definitions previous ;
   89: 
   90: H
   91: 
   92: >CROSS
   93: 
   94: \ Variables                                            06oct92py
   95: 
   96: -1 Constant NIL
   97: Variable image
   98: Variable tlast    NIL tlast !  \ Last name field
   99: Variable tlastcfa \ Last code field
  100: Variable tdoes    \ Resolve does> calls
  101: Variable bit$
  102: Variable tdp
  103: : there  tdp @ ;
  104: 
  105: \ Parameter for target systems                         06oct92py
  106: 
  107: included
  108: 
  109: \ Create additional parameters                         19jan95py
  110: 
  111: T
  112: cell               Constant tcell
  113: cell<<             Constant tcell<<
  114: cell>bit           Constant tcell>bit
  115: bits/byte          Constant tbits/byte
  116: float              Constant tfloat
  117: 1 bits/byte lshift Constant maxbyte
  118: H
  119: 
  120: >TARGET
  121: 
  122: \ Byte ordering and cell size                          06oct92py
  123: 
  124: : cell+         tcell + ;
  125: : cells         tcell<< lshift ;
  126: : chars         ;
  127: : floats	tfloat * ;
  128:     
  129: >CROSS
  130: : cell/         tcell<< rshift ;
  131: >TARGET
  132: 20 CONSTANT bl
  133: -1 Constant NIL
  134: -2 Constant :docol
  135: -3 Constant :docon
  136: -4 Constant :dovar
  137: -5 Constant :douser
  138: -6 Constant :dodefer
  139: -7 Constant :dofield
  140: -8 Constant :dodoes
  141: -9 Constant :doesjump
  142: 
  143: >CROSS
  144: 
  145: bigendian
  146: [IF]
  147:    : T!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
  148:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
  149:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds
  150:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
  151: [ELSE]
  152:    : T!  ( n addr -- )  >r s>d r> tcell bounds
  153:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
  154:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
  155:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
  156: [THEN]
  157: 
  158: \ Memory initialisation                                05dec92py
  159: \ Fixed bug in else part                               11may93jaw
  160: 
  161: [IFDEF] Memory \ Memory is a bigFORTH feature
  162:    also Memory
  163:    : initmem ( var len -- )
  164:      2dup swap handle! >r @ r> erase ;
  165:    toss
  166: [ELSE]
  167:    : initmem ( var len -- )
  168:      tuck allocate abort" CROSS: No memory for target"
  169:      ( len var adr ) dup rot !
  170:      ( len adr ) swap erase ;
  171: [THEN]
  172: 
  173: \ MakeKernal                                           12dec92py
  174: 
  175: >MINIMAL
  176: : makekernal ( targetsize -- targetsize )
  177:   bit$  over 1- cell>bit rshift 1+ initmem
  178:   image over initmem tdp off ;
  179: 
  180: >CROSS
  181: \ Bit string manipulation                               06oct92py
  182: \                                                       9may93jaw
  183: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  184: : bits ( n -- n ) chars Bittable + c@ ;
  185: 
  186: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  187: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  188: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  189: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  190: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  191: 
  192: \ Target memory access                                 06oct92py
  193: 
  194: : align+  ( taddr -- rest )
  195:     cell tuck 1- and - [ cell 1- ] Literal and ;
  196: : cfalign+  ( taddr -- rest )
  197:     \ see kernal.fs:cfaligned
  198:     float tuck 1- and - [ float 1- ] Literal and ;
  199: 
  200: >TARGET
  201: : aligned ( taddr -- ta-addr )  dup align+ + ;
  202: \ assumes cell alignment granularity (as GNU C)
  203: 
  204: : cfaligned ( taddr1 -- taddr2 )
  205:     \ see kernal.fs
  206:     dup cfalign+ + ;
  207: 
  208: >CROSS
  209: : >image ( taddr -- absaddr )  image @ + ;
  210: >TARGET
  211: : @  ( taddr -- w )     >image t@ ;
  212: : !  ( w taddr -- )     >image t! ;
  213: : c@ ( taddr -- char )  >image c@ ;
  214: : c! ( char taddr -- )  >image c! ;
  215: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  216: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  217: 
  218: \ Target compilation primitives                        06oct92py
  219: \ included A!                                          16may93jaw
  220: 
  221: : here  ( -- there )    there ;
  222: : allot ( n -- )        tdp +! ;
  223: : ,     ( w -- )        T here H cell T allot  ! H ;
  224: : c,    ( char -- )     T here    1 allot c! H ;
  225: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  226: : cfalign ( -- )
  227:     T here H cfalign+ 0 ?DO  bl T c, H LOOP ;
  228: 
  229: : A!                    dup relon T ! H ;
  230: : A,    ( w -- )        T here H relon T , H ;
  231: 
  232: >CROSS
  233: 
  234: \ threading modell                                     13dec92py
  235: 
  236: \ generic threading modell
  237: : docol,  ( -- ) :docol T A, 0 , H ;
  238: 
  239: >TARGET
  240: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  241: >CROSS
  242: 
  243: : dodoes, ( -- ) T :doesjump A, 0 , H ;
  244: 
  245: \ Ghost Builder                                        06oct92py
  246: 
  247: \ <T T> new version with temp variable                 10may93jaw
  248: 
  249: VARIABLE VocTemp
  250: 
  251: : <T  get-current VocTemp ! also Ghosts definitions ;
  252: : T>  previous VocTemp @ set-current ;
  253: 
  254: 4711 Constant <fwd>             4712 Constant <res>
  255: 4713 Constant <imm>
  256: 
  257: \ iForth makes only immediate directly after create
  258: \ make atonce trick! ?
  259: 
  260: Variable atonce atonce off
  261: 
  262: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  263: 
  264: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  265: 
  266: : >magic ; : >link cell+ ; : >exec cell+ cell+ ;
  267: : >end 3 cells + ;
  268: 
  269: Variable last-ghost
  270: : Make-Ghost ( "name" -- ghost )
  271:   >in @ GhostName swap >in !
  272:   <T Create atonce @ IF immediate atonce off THEN
  273:   here tuck swap ! ghostheader T>
  274:   DOES> dup last-ghost ! >exec @ execute ;
  275: 
  276: \ ghost words                                          14oct92py
  277: \                                          changed:    10may93py/jaw
  278: 
  279: : gfind   ( string -- ghost true/1 / string false )
  280: \ searches for string in word-list ghosts
  281: \ !! wouldn't it be simpler to just use search-wordlist ? ae
  282:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  283:   dup IF  >r >body nip r>  THEN ;
  284: 
  285: VARIABLE Already
  286: 
  287: : ghost   ( "name" -- ghost )
  288:   Already off
  289:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  290:   drop  >in !  Make-Ghost ;
  291: 
  292: \ resolve                                              14oct92py
  293: 
  294: : resolve-loop ( ghost tcfa -- ghost tcfa )
  295:   >r dup >link @
  296:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  297: 
  298: \ exists                                                9may93jaw
  299: 
  300: : exists ( ghost tcfa -- )
  301:   over GhostNames
  302:   BEGIN @ dup
  303:   WHILE 2dup cell+ @ =
  304:   UNTIL
  305:         2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
  306:         swap cell+ !
  307:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  308:   THEN ;
  309: 
  310: : resolve  ( ghost tcfa -- )
  311:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  312:   resolve-loop  over >link ! <res> swap >magic ! ;
  313: 
  314: \ gexecute ghost,                                      01nov92py
  315: 
  316: : do-forward   ( ghost -- )
  317:   >link dup @  there rot !  T  A,  H ;
  318: : do-resolve   ( ghost -- )
  319:   >link @                   T  A,  H ;
  320: 
  321: : gexecute   ( ghost -- )   dup @
  322:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  323: : ghost,     ghost  gexecute ;
  324: 
  325: \ .unresolved                                          11may93jaw
  326: 
  327: variable ResolveFlag
  328: 
  329: \ ?touched                                             11may93jaw
  330: 
  331: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  332:                                0 <> and ;
  333: 
  334: : ?resolved  ( ghostname -- )
  335:   dup cell+ @ ?touched
  336:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  337: 
  338: >MINIMAL
  339: : .unresolved  ( -- )
  340:   ResolveFlag off cr ." Unresolved: "
  341:   Ghostnames
  342:   BEGIN @ dup
  343:   WHILE dup ?resolved
  344:   REPEAT drop ResolveFlag @
  345:   IF
  346:       abort" Unresolved words!"
  347:   ELSE
  348:       ." Nothing!"
  349:   THEN
  350:   cr ;
  351: 
  352: >CROSS
  353: \ Header states                                        12dec92py
  354: 
  355: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  356: 
  357: VARIABLE ^imm
  358: 
  359: >TARGET
  360: : immediate     20 flag!
  361:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  362:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  363:                 <imm> ^imm @ ! ;
  364: : restrict      40 flag! ;
  365: >CROSS
  366: 
  367: \ ALIAS2 ansforth conform alias                          9may93jaw
  368: 
  369: : ALIAS2 create here 0 , DOES> @ execute ;
  370: \ usage:
  371: \ ' <name> alias2 bla !
  372: 
  373: \ Target Header Creation                               01nov92py
  374: 
  375: : string,  ( addr count -- )
  376:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  377: : name,  ( "name" -- )  bl word count string, T cfalign H ;
  378: : view,   ( -- ) ( dummy ) ;
  379: 
  380: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  381: 
  382: s" crossdoc.fd" r/w create-file throw value doc-file-id
  383: \ contains the file-id of the documentation file
  384: 
  385: : \G ( -- )
  386:     source >in @ /string doc-file-id write-line throw
  387:     source >in ! drop ; immediate
  388: 
  389: Variable to-doc
  390: 
  391: : cross-doc-entry  ( -- )
  392:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
  393:     IF
  394: 	s" " doc-file-id write-line throw
  395: 	s" make-doc " doc-file-id write-file throw
  396: 	tlast @ >image count $1F and doc-file-id write-file throw
  397: 	>in @
  398: 	[char] ( parse 2drop
  399: 	[char] ) parse doc-file-id write-file throw
  400: 	s"  )" doc-file-id write-file throw
  401: 	[char] \ parse 2drop					
  402: 	POSTPONE \g
  403: 	>in !
  404:     THEN  to-doc on ;
  405: 
  406: \ Target TAGS creation
  407: 
  408: s" kernal.TAGS" r/w create-file throw value tag-file-id
  409: \ contains the file-id of the tags file
  410: 
  411: Create tag-beg 2 c,  7F c, bl c,
  412: Create tag-end 2 c,  bl c, 01 c,
  413: Create tag-bof 1 c,  0C c,
  414: 
  415: 2variable last-loadfilename 0 0 last-loadfilename 2!
  416: 	    
  417: : put-load-file-name ( -- )
  418:     loadfilename 2@ last-loadfilename 2@ d<>
  419:     IF
  420: 	tag-bof count tag-file-id write-line throw
  421: 	sourcefilename 2dup
  422: 	tag-file-id write-file throw
  423: 	last-loadfilename 2!
  424: 	s" ,0" tag-file-id write-line throw
  425:     THEN ;
  426: 
  427: : cross-tag-entry  ( -- )
  428:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
  429:     IF
  430: 	put-load-file-name
  431: 	source >in @ min tag-file-id write-file throw
  432: 	tag-beg count tag-file-id write-file throw
  433: 	tlast @ >image count $1F and tag-file-id write-file throw
  434: 	tag-end count tag-file-id write-file throw
  435: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
  436: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
  437: 	s" ,0" tag-file-id write-line throw
  438: 	base !
  439:     THEN ;
  440: 
  441: \ Target header creation
  442: 
  443: VARIABLE CreateFlag CreateFlag off
  444: 
  445: : (Theader ( "name" -- ghost ) T align H view,
  446:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  447:   >in @ name, >in ! T here H tlastcfa !
  448:   CreateFlag @ IF
  449:        >in @ alias2 swap >in !         \ create alias in target
  450:        >in @ ghost swap >in !
  451:        swap also ghosts ' previous swap !     \ tick ghost and store in alias
  452:        CreateFlag off
  453:   ELSE ghost THEN
  454:   dup >magic ^imm !     \ a pointer for immediate
  455:   Already @ IF  dup >end tdoes !
  456:   ELSE 0 tdoes ! THEN
  457:   80 flag!
  458:   cross-doc-entry cross-tag-entry ;
  459: 
  460: VARIABLE ;Resolve 1 cells allot
  461: 
  462: : Theader  ( "name" -- ghost )
  463:   (THeader dup there resolve 0 ;Resolve ! ;
  464: 
  465: >TARGET
  466: : Alias    ( cfa -- ) \ name
  467:   dup 0< IF  to-doc off  THEN
  468:   (THeader over resolve T A, H 80 flag! ;
  469: >CROSS
  470: 
  471: \ Conditionals and Comments                            11may93jaw
  472: 
  473: : ;Cond
  474:   postpone ;
  475:   swap ! ;  immediate
  476: 
  477: : Cond: ( -- ) \ name {code } ;
  478:   atonce on
  479:   ghost
  480:   >exec
  481:   :NONAME ;
  482: 
  483: : restrict? ( -- )
  484: \ aborts on interprete state - ae
  485:   state @ 0= ABORT" CROSS: Restricted" ;
  486: 
  487: : Comment ( -- )
  488:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  489: 
  490: Comment (       Comment \
  491: 
  492: \ Predefined ghosts                                    12dec92py
  493: 
  494: ghost 0=                                        drop
  495: ghost branch    ghost ?branch                   2drop
  496: ghost (do)      ghost (?do)                     2drop
  497: ghost (for)                                     drop
  498: ghost (loop)    ghost (+loop)                   2drop
  499: ghost (next)                                    drop
  500: ghost unloop    ghost ;S                        2drop
  501: ghost lit       ghost (compile) ghost !         2drop drop
  502: ghost (does>)   ghost noop                      2drop
  503: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  504: ghost '
  505: 
  506: \ compile                                              10may93jaw
  507: 
  508: : compile  ( -- ) \ name
  509:   restrict?
  510:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
  511:   0> ( immediate? )
  512:   IF    >exec @ compile,
  513:   ELSE  postpone literal postpone gexecute  THEN ;
  514:                                         immediate
  515: 
  516: >TARGET
  517: : '  ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
  518:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  519: 
  520: Cond: [']  compile lit ghost gexecute ;Cond
  521: 
  522: Cond: chars ;Cond
  523: 
  524: >CROSS
  525: \ tLiteral                                             12dec92py
  526: 
  527: : lit, ( n -- )   compile lit T  ,  H ;
  528: : alit, ( n -- )  compile lit T A,  H ;
  529: 
  530: >TARGET
  531: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  532: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  533: 
  534: : Char ( "<char>" -- )  bl word char+ c@ ;
  535: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  536: 
  537: >CROSS
  538: \ Target compiling loop                                12dec92py
  539: \ ">tib trick thrown out                               10may93jaw
  540: \ number? defined at the top                           11may93jaw
  541: 
  542: \ compiled word might leave items on stack!
  543: : tcom ( in name -- )
  544:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  545:                         ELSE  nip gexecute  THEN EXIT THEN
  546:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  547:                ELSE  2drop >in !
  548:                ghost gexecute THEN  ;
  549: 
  550: >TARGET
  551: \ : ; DOES>                                            13dec92py
  552: \ ]                                                     9may93py/jaw
  553: 
  554: : ] state on
  555:     BEGIN
  556:         BEGIN >in @ bl word
  557:               dup c@ 0= WHILE 2drop refill 0=
  558:               ABORT" CROSS: End of file while target compiling"
  559:         REPEAT
  560:         tcom
  561:         state @
  562:         0=
  563:     UNTIL ;
  564: 
  565: \ by the way: defining a second interpreter (a compiler-)loop
  566: \             is not allowed if a system should be ans conform
  567: 
  568: : : ( -- colon-sys ) \ Name
  569:   (THeader ;Resolve ! there ;Resolve cell+ !
  570:   docol, depth T ] H ;
  571: 
  572: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  573: 
  574: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  575: 
  576: Cond: ; ( -- ) restrict?
  577:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  578:                           ELSE true ABORT" CROSS: Stack empty" THEN
  579:                compile ;S state off
  580:                ;Resolve @
  581:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  582:                ;Cond
  583: Cond: [  restrict? state off ;Cond
  584: 
  585: >CROSS
  586: : !does  :dodoes tlastcfa @ tuck T ! cell+ ! H ;
  587: 
  588: >TARGET
  589: Cond: DOES> restrict?
  590:         compile (does>) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  591:         ;Cond
  592: : DOES> dodoes, T here H !does depth T ] H ;
  593: 
  594: >CROSS
  595: \ Creation                                             01nov92py
  596: 
  597: \ Builder                                               11may93jaw
  598: 
  599: : Builder    ( Create do: "name" -- )
  600:   >in @ alias2 swap dup >in ! >r >r
  601:   Make-Ghost rot swap >exec ! ,
  602:   r> r> >in !
  603:   also ghosts ' previous swap ! ;
  604: \  DOES>  dup >exec @ execute ;
  605: 
  606: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  607:   IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
  608:   :dodoes T A, H gexecute T here H cell - reloff ;
  609: 
  610: : TCreate ( -- )
  611:   last-ghost @
  612:   CreateFlag on
  613:   Theader >r dup gdoes,
  614:   >end @ >exec @ r> >exec ! ;
  615: 
  616: : Build:  ( -- [xt] [colon-sys] )
  617:   :noname  postpone TCreate ;
  618: 
  619: : gdoes>  ( ghost -- addr flag )
  620:   last-ghost @
  621:   state @ IF  gexecute true EXIT  THEN
  622:   cell+ @ T >body H false ;
  623: 
  624: \ DO: ;DO                                               11may93jaw
  625: \ changed to ?EXIT                                      10may93jaw
  626: 
  627: : DO:     ( -- addr [xt] [colon-sys] )
  628:   here ghostheader
  629:   :noname postpone gdoes> postpone ?EXIT ;
  630: 
  631: : ;DO ( addr [xt] [colon-sys] -- )
  632:   postpone ;    ( S addr xt )
  633:   over >exec ! ; immediate
  634: 
  635: : by      ( -- addr ) \ Name
  636:   ghost >end @ ;
  637: 
  638: >TARGET
  639: \ Variables and Constants                              05dec92py
  640: 
  641: Build:  ;
  642: DO: ( ghost -- addr ) ;DO
  643: Builder Create
  644: by Create :dovar resolve
  645: 
  646: Build: T 0 , H ;
  647: by Create
  648: Builder Variable
  649: 
  650: Build: T 0 A, H ;
  651: by Create
  652: Builder AVariable
  653: 
  654: \ User variables                                       04may94py
  655: 
  656: >CROSS
  657: Variable tup  0 tup !
  658: Variable tudp 0 tudp !
  659: : u,  ( n -- udp )
  660:   tup @ tudp @ + T  ! H
  661:   tudp @ dup T cell+ H tudp ! ;
  662: : au, ( n -- udp )
  663:   tup @ tudp @ + T A! H
  664:   tudp @ dup T cell+ H tudp ! ;
  665: >TARGET
  666: 
  667: Build: T 0 u, , H ;
  668: DO: ( ghost -- up-addr )  T @ H tup @ + ;DO
  669: Builder User
  670: by User :douser resolve
  671: 
  672: Build: T 0 u, , 0 u, drop H ;
  673: by User
  674: Builder 2User
  675: 
  676: Build: T 0 au, , H ;
  677: by User
  678: Builder AUser
  679: 
  680: Build:  ( n -- ) T , H ;
  681: DO: ( ghost -- n ) T @ H ;DO
  682: Builder Constant
  683: by Constant :docon resolve
  684: 
  685: Build:  ( n -- ) T A, H ;
  686: by Constant
  687: Builder AConstant
  688: 
  689: Build:  ( d -- ) T , , H ;
  690: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
  691: Builder 2Constant
  692: 
  693: Build: T 0 , H ;
  694: by Constant
  695: Builder Value
  696: 
  697: Build: T 0 A, H ;
  698: by Constant
  699: Builder AValue
  700: 
  701: Build:  ( -- ) compile noop ;
  702: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  703: Builder Defer
  704: by Defer :dodefer resolve
  705: 
  706: \ Sturctures                                           23feb95py
  707: 
  708: >CROSS
  709: : nalign ( addr1 n -- addr2 )
  710: \ addr2 is the aligned version of addr1 wrt the alignment size n
  711:  1- tuck +  swap invert and ;
  712: >TARGET
  713: 
  714: Build: 	>r rot r@ nalign  dup T , H  ( align1 size offset )
  715: 	+ swap r> nalign ;
  716: DO: T @ H + ;DO
  717: Builder Field
  718: by Field :dofield resolve
  719: 
  720: : struct  T 0 1 chars H ;
  721: : end-struct  T 2Constant H ;
  722: 
  723: : cells: ( n -- size align )
  724:     T cells 1 cells H ;
  725: 
  726: \ ' 2Constant Alias2 end-struct
  727: \ 0 1 T Chars H 2Constant struct
  728: 
  729: \ structural conditionals                              17dec92py
  730: 
  731: >CROSS
  732: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  733: : sys?        ( sys -- sys )    dup 0= ?struc ;
  734: : >mark       ( -- sys )        T here  0 , H ;
  735: : >resolve    ( sys -- )        T here over - swap ! H ;
  736: : <resolve    ( sys -- )        T here - , H ;
  737: >TARGET
  738: 
  739: \ Structural Conditionals                              12dec92py
  740: 
  741: Cond: BUT       restrict? sys? swap ;Cond
  742: Cond: YET       restrict? sys? dup ;Cond
  743: 
  744: >CROSS
  745: Variable tleavings
  746: >TARGET
  747: 
  748: Cond: DONE   ( addr -- )  restrict? tleavings @
  749:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  750:       tleavings ! drop ;Cond
  751: 
  752: >CROSS
  753: : (leave  T here H tleavings @ T , H  tleavings ! ;
  754: >TARGET
  755: 
  756: Cond: LEAVE     restrict? compile branch (leave ;Cond
  757: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  758: 
  759: \ Structural Conditionals                              12dec92py
  760: 
  761: Cond: AHEAD     restrict? compile branch >mark ;Cond
  762: Cond: IF        restrict? compile ?branch >mark ;Cond
  763: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  764: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  765: 
  766: Cond: BEGIN     restrict? T here H ;Cond
  767: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  768: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  769: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  770: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  771: 
  772: \ Structural Conditionals                              12dec92py
  773: 
  774: Cond: DO        restrict? compile (do)   T here H ;Cond
  775: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  776: Cond: FOR       restrict? compile (for)  T here H ;Cond
  777: 
  778: >CROSS
  779: : loop]   dup <resolve cell - compile DONE compile unloop ;
  780: >TARGET
  781: 
  782: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  783: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  784: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  785: 
  786: \ String words                                         23feb93py
  787: 
  788: : ,"            [char] " parse string, T align H ;
  789: 
  790: Cond: ."        restrict? compile (.")     T ," H ;Cond
  791: Cond: S"        restrict? compile (S")     T ," H ;Cond
  792: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  793: 
  794: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  795: : IS            T ' >body ! H ;
  796: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  797: : TO            T ' >body ! H ;
  798: 
  799: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  800: 
  801: \ linked list primitive
  802: : linked        T here over @ A, swap ! H ;
  803: 
  804: : err"   s" ErrLink linked" evaluate T , H
  805:          [char] " parse string, T align H ;
  806: 
  807: : env"  [char] " parse s" EnvLink linked" evaluate
  808:         string, T align , H ;
  809: 
  810: : 2env" [char] " parse s" EnvLink linked" evaluate
  811:         here >r string, T align , , H
  812:         r> dup T c@ H 80 and swap T c! H ;
  813: 
  814: \ compile must be last                                 22feb93py
  815: 
  816: Cond: compile ( -- ) restrict? \ name
  817:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  818:       0> IF    gexecute
  819:          ELSE  dup >magic @ <imm> =
  820:                IF   gexecute
  821:                ELSE compile (compile) gexecute THEN THEN ;Cond
  822: 
  823: Cond: postpone ( -- ) restrict? \ name
  824:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  825:       0> IF    gexecute
  826:          ELSE  dup >magic @ <imm> =
  827:                IF   gexecute
  828:                ELSE compile (compile) gexecute THEN THEN ;Cond
  829: 
  830: >MINIMAL
  831: also minimal
  832: \ Usefull words                                        13feb93py
  833: 
  834: : KB  400 * ;
  835: 
  836: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  837: 
  838: : there? bl word gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
  839: 
  840: : [IFDEF] there? postpone [IF] ;
  841: : [IFUNDEF] there? 0= postpone [IF] ;
  842: 
  843: \ C: \- \+ Conditional Compiling                         09jun93jaw
  844: 
  845: : C: >in @ there? 0=
  846:      IF    >in ! T : H
  847:      ELSE drop
  848:         BEGIN bl word dup c@
  849:               IF   count comment? s" ;" compare 0= ?EXIT
  850:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  851:               THEN
  852:         AGAIN
  853:      THEN ;
  854: 
  855: also minimal
  856: 
  857: : \- there? IF postpone \ THEN ;
  858: : \+ there? 0= IF postpone \ THEN ;
  859: 
  860: : [IF]   postpone [IF] ;
  861: : [THEN] postpone [THEN] ;
  862: : [ELSE] postpone [ELSE] ;
  863: 
  864: Cond: [IF]      [IF] ;Cond
  865: Cond: [IFDEF]   [IFDEF] ;Cond
  866: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  867: Cond: [THEN]    [THEN] ;Cond
  868: Cond: [ELSE]    [ELSE] ;Cond
  869: 
  870: \ save-cross                                           17mar93py
  871: 
  872: \ i'm not interested in bigforth features this time    10may93jaw
  873: \ [IFDEF] file
  874: \ also file
  875: \ [THEN]
  876: \ included throw after create-file                     11may93jaw
  877: 
  878: bigendian Constant bigendian
  879: 
  880: Create magic  s" gforth00" here over allot swap move
  881: 
  882: [char] 1 bigendian + cell + magic 7 + c!
  883: 
  884: : save-cross ( "name" -- )
  885:   bl parse ." Saving to " 2dup type
  886:   w/o bin create-file throw >r
  887:   magic 8       r@ write-file throw \ write magic
  888:   image @ there r@ write-file throw \ write image
  889:   bit$  @ there 1- cell>bit rshift 1+
  890:                 r@ write-file throw \ write tags
  891:   r> close-file throw ;
  892: 
  893: \ words that should be in minimal
  894: 
  895: : + + ;         : 1- 1- ;
  896: : - - ;         : 2* 2* ;
  897: : * * ;         : / / ;
  898: : dup dup ;     : over over ;
  899: : swap swap ;   : rot rot ;
  900: : drop drop ;   : =   = ;
  901: : lshift lshift ; : 2/ 2/ ;
  902: : . . ;
  903: cell constant cell
  904: 
  905: \ include bug5.fs
  906: \ only forth also minimal definitions
  907: 
  908: : \  postpone \ ;
  909: : \G postpone \G ;
  910: : (  postpone ( ;
  911: : include bl word count included ;
  912: : .( [char] ) parse type ;
  913: : cr cr ;
  914: 
  915: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
  916: only forth also minimal definitions
  917: 
  918: \ cross-compiler words
  919: 
  920: : decimal       decimal ;
  921: : hex           hex ;
  922: 
  923: : tudp          T tudp H ;
  924: : tup           T tup H ;  minimal
  925: 
  926: \ for debugging...
  927: : order         order ;
  928: : words         words ;
  929: : .s            .s ;
  930: 
  931: : bye           bye ;
  932: 
  933: \ turnkey direction
  934: : H forth ; immediate
  935: : T minimal ; immediate
  936: : G ghosts ; immediate
  937: 
  938: : turnkey  0 set-order also Target definitions
  939:            also Minimal also ;
  940: 
  941: \ these ones are pefered:
  942: 
  943: : lock   turnkey ;
  944: : unlock forth also cross ;
  945: 
  946: unlock definitions also minimal
  947: : lock   lock ;
  948: lock

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