File:  [gforth] / gforth / cross.fs
Revision 1.47: download - view: text, annotated - select for diffs
Thu Apr 10 21:32:08 1997 UTC (22 years, 8 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Made \G work in interpret cross state

    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: \ Parameter for target systems                         06oct92py
   95: 
   96: mach-file count included
   97: 
   98: also Forth definitions
   99: 
  100: [IFDEF] asm-include asm-include [THEN]
  101: 
  102: previous
  103: hex
  104: 
  105: >CROSS
  106: 
  107: \ Variables                                            06oct92py
  108: 
  109: Variable image
  110: Variable tlast    NIL tlast !  \ Last name field
  111: Variable tlastcfa \ Last code field
  112: Variable tdoes    \ Resolve does> calls
  113: Variable bit$
  114: Variable tdp
  115: : there  tdp @ ;
  116: 
  117: \ Create additional parameters                         19jan95py
  118: 
  119: T
  120: cell               Constant tcell
  121: cell<<             Constant tcell<<
  122: cell>bit           Constant tcell>bit
  123: bits/byte          Constant tbits/byte
  124: float              Constant tfloat
  125: 1 bits/byte lshift Constant maxbyte
  126: H
  127: 
  128: >TARGET
  129: 
  130: \ Byte ordering and cell size                          06oct92py
  131: 
  132: : cell+         tcell + ;
  133: : cells         tcell<< lshift ;
  134: : chars         ;
  135: : floats	tfloat * ;
  136:     
  137: >CROSS
  138: : cell/         tcell<< rshift ;
  139: >TARGET
  140: 20 CONSTANT bl
  141: -1 Constant NIL
  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: : makekernel ( 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 kernel.fs:cfaligned
  198:     /maxalign tuck 1- and - [ /maxalign 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 kernel.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: >TARGET
  237: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  238: >CROSS
  239: 
  240: \ Ghost Builder                                        06oct92py
  241: 
  242: \ <T T> new version with temp variable                 10may93jaw
  243: 
  244: VARIABLE VocTemp
  245: 
  246: : <T  get-current VocTemp ! also Ghosts definitions ;
  247: : T>  previous VocTemp @ set-current ;
  248: 
  249: hex
  250: 4711 Constant <fwd>             4712 Constant <res>
  251: 4713 Constant <imm>             4714 Constant <do:>
  252: 
  253: \ iForth makes only immediate directly after create
  254: \ make atonce trick! ?
  255: 
  256: Variable atonce atonce off
  257: 
  258: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  259: 
  260: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  261: 
  262: : >magic ;
  263: : >link cell+ ;
  264: : >exec cell+ cell+ ;
  265: : >end 3 cells + ;
  266: 
  267: Variable last-ghost
  268: : Make-Ghost ( "name" -- ghost )
  269:   >in @ GhostName swap >in !
  270:   <T Create atonce @ IF immediate atonce off THEN
  271:   here tuck swap ! ghostheader T>
  272:   DOES> dup last-ghost ! >exec @ execute ;
  273: 
  274: \ ghost words                                          14oct92py
  275: \                                          changed:    10may93py/jaw
  276: 
  277: : gfind   ( string -- ghost true/1 / string false )
  278: \ searches for string in word-list ghosts
  279:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  280:   dup IF >r >body nip r>  THEN ;
  281: 
  282: VARIABLE Already
  283: 
  284: : ghost   ( "name" -- ghost )
  285:   Already off
  286:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  287:   drop  >in !  Make-Ghost ;
  288: 
  289: \ resolve                                              14oct92py
  290: 
  291: : resolve-loop ( ghost tcfa -- ghost tcfa )
  292:   >r dup >link @
  293:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  294: 
  295: \ exists                                                9may93jaw
  296: 
  297: : exists ( ghost tcfa -- )
  298:   over GhostNames
  299:   BEGIN @ dup
  300:   WHILE 2dup cell+ @ =
  301:   UNTIL
  302:         2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
  303:         swap cell+ !
  304:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  305:   THEN ;
  306: 
  307: : resolve  ( ghost tcfa -- )
  308:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  309:   resolve-loop  over >link ! <res> swap >magic ! ;
  310: 
  311: \ gexecute ghost,                                      01nov92py
  312: 
  313: : do-forward   ( ghost -- )
  314:   >link dup @  there rot !  T  A,  H ;
  315: : do-resolve   ( ghost -- )
  316:   >link @                   T  A,  H ;
  317: 
  318: : gexecute   ( ghost -- )   dup @
  319:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  320: : ghost,     ghost  gexecute ;
  321: 
  322: \ .unresolved                                          11may93jaw
  323: 
  324: variable ResolveFlag
  325: 
  326: \ ?touched                                             11may93jaw
  327: 
  328: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  329:                                0 <> and ;
  330: 
  331: : ?resolved  ( ghostname -- )
  332:   dup cell+ @ ?touched
  333:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  334: 
  335: >MINIMAL
  336: : .unresolved  ( -- )
  337:   ResolveFlag off cr ." Unresolved: "
  338:   Ghostnames
  339:   BEGIN @ dup
  340:   WHILE dup ?resolved
  341:   REPEAT drop ResolveFlag @
  342:   IF
  343:       abort" Unresolved words!"
  344:   ELSE
  345:       ." Nothing!"
  346:   THEN
  347:   cr ;
  348: 
  349: >CROSS
  350: \ Header states                                        12dec92py
  351: 
  352: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  353: 
  354: VARIABLE ^imm
  355: 
  356: >TARGET
  357: : immediate     40 flag!
  358:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  359:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  360:                 <imm> ^imm @ ! ;
  361: : restrict      20 flag! ;
  362: >CROSS
  363: 
  364: \ ALIAS2 ansforth conform alias                          9may93jaw
  365: 
  366: : ALIAS2 create here 0 , DOES> @ execute ;
  367: \ usage:
  368: \ ' <name> alias2 bla !
  369: 
  370: \ Target Header Creation                               01nov92py
  371: 
  372: : string,  ( addr count -- )
  373:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  374: : name,  ( "name" -- )  bl word count string, T cfalign H ;
  375: : view,   ( -- ) ( dummy ) ;
  376: 
  377: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  378: 
  379: s" crossdoc.fd" r/w create-file throw value doc-file-id
  380: \ contains the file-id of the documentation file
  381: 
  382: : T-\G ( -- )
  383:     source >in @ /string doc-file-id write-line throw
  384:     postpone \ ;
  385: 
  386: Variable to-doc  to-doc on
  387: 
  388: : cross-doc-entry  ( -- )
  389:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
  390:     IF
  391: 	s" " doc-file-id write-line throw
  392: 	s" make-doc " doc-file-id write-file throw
  393: 	tlast @ >image count $1F and doc-file-id write-file throw
  394: 	>in @
  395: 	[char] ( parse 2drop
  396: 	[char] ) parse doc-file-id write-file throw
  397: 	s"  )" doc-file-id write-file throw
  398: 	[char] \ parse 2drop					
  399: 	T-\G
  400: 	>in !
  401:     THEN ;
  402: 
  403: \ Target TAGS creation
  404: 
  405: s" kernel.TAGS" r/w create-file throw value tag-file-id
  406: \ contains the file-id of the tags file
  407: 
  408: Create tag-beg 2 c,  7F c, bl c,
  409: Create tag-end 2 c,  bl c, 01 c,
  410: Create tag-bof 1 c,  0C c,
  411: 
  412: 2variable last-loadfilename 0 0 last-loadfilename 2!
  413: 	    
  414: : put-load-file-name ( -- )
  415:     loadfilename 2@ last-loadfilename 2@ d<>
  416:     IF
  417: 	tag-bof count tag-file-id write-line throw
  418: 	sourcefilename 2dup
  419: 	tag-file-id write-file throw
  420: 	last-loadfilename 2!
  421: 	s" ,0" tag-file-id write-line throw
  422:     THEN ;
  423: 
  424: : cross-tag-entry  ( -- )
  425:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
  426:     IF
  427: 	put-load-file-name
  428: 	source >in @ min tag-file-id write-file throw
  429: 	tag-beg count tag-file-id write-file throw
  430: 	tlast @ >image count $1F and tag-file-id write-file throw
  431: 	tag-end count tag-file-id write-file throw
  432: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
  433: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
  434: 	s" ,0" tag-file-id write-line throw
  435: 	base !
  436:     THEN ;
  437: 
  438: \ Check for words
  439: 
  440: Defer skip? ' false IS skip?
  441: 
  442: : defined? ( -- flag ) \ name
  443:     ghost >magic @ <fwd> <> ;
  444: 
  445: : needed? ( -- flag ) \ name
  446:     ghost dup >magic @ <fwd> =
  447:     IF  >link @ 0<>  ELSE  drop false  THEN ;
  448: 
  449: : doer? ( -- flag ) \ name
  450:     ghost >magic @ <do:> = ;
  451: 
  452: : skip-defs ( -- )
  453:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
  454: 
  455: \ Target header creation
  456: 
  457: VARIABLE CreateFlag CreateFlag off
  458: 
  459: : (Theader ( "name" -- ghost )
  460: \  >in @ bl word count type 2 spaces >in !
  461:   T align H view,
  462:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  463:   >in @ name, >in ! T here H tlastcfa !
  464:   CreateFlag @ IF
  465:        >in @ alias2 swap >in !         \ create alias in target
  466:        >in @ ghost swap >in !
  467:        swap also ghosts ' previous swap !     \ tick ghost and store in alias
  468:        CreateFlag off
  469:   ELSE ghost THEN
  470:   dup >magic ^imm !     \ a pointer for immediate
  471:   Already @ IF  dup >end tdoes !
  472:   ELSE 0 tdoes ! THEN
  473:   80 flag!
  474:   cross-doc-entry cross-tag-entry ;
  475: 
  476: VARIABLE ;Resolve 1 cells allot
  477: 
  478: : Theader  ( "name" -- ghost )
  479:   (THeader dup there resolve 0 ;Resolve ! ;
  480: 
  481: >TARGET
  482: : Alias    ( cfa -- ) \ name
  483:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  484:     dup 0< has-prims 0= and
  485:     IF
  486: 	." needs prim: " >in @ bl word count type >in ! cr
  487:     THEN
  488:     (THeader over resolve T A, H 80 flag! ;
  489: : Alias:   ( cfa -- ) \ name
  490:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  491:     dup 0< has-prims 0= and
  492:     IF
  493: 	." needs doer: " >in @ bl word count type >in ! cr
  494:     THEN
  495:     ghost tuck swap resolve <do:> swap >magic ! ;
  496: >CROSS
  497: 
  498: \ Conditionals and Comments                            11may93jaw
  499: 
  500: : ;Cond
  501:   postpone ;
  502:   swap ! ;  immediate
  503: 
  504: : Cond: ( -- ) \ name {code } ;
  505:   atonce on
  506:   ghost
  507:   >exec
  508:   :NONAME ;
  509: 
  510: : restrict? ( -- )
  511: \ aborts on interprete state - ae
  512:   state @ 0= ABORT" CROSS: Restricted" ;
  513: 
  514: : Comment ( -- )
  515:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  516: 
  517: Comment (       Comment \
  518: 
  519: \ Predefined ghosts                                    12dec92py
  520: 
  521: ghost 0=                                        drop
  522: ghost branch    ghost ?branch                   2drop
  523: ghost (do)      ghost (?do)                     2drop
  524: ghost (for)                                     drop
  525: ghost (loop)    ghost (+loop)                   2drop
  526: ghost (next)                                    drop
  527: ghost unloop    ghost ;S                        2drop
  528: ghost lit       ghost (compile) ghost !         2drop drop
  529: ghost (does>)   ghost noop                      2drop
  530: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  531: ghost '                                         drop
  532: ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
  533: ghost over      ghost =         ghost drop      2drop drop
  534: 
  535: \ compile                                              10may93jaw
  536: 
  537: : compile  ( -- ) \ name
  538:   restrict?
  539:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
  540:   0> ( immediate? )
  541:   IF    >exec @ compile,
  542:   ELSE  postpone literal postpone gexecute  THEN ;
  543:                                         immediate
  544: 
  545: \ generic threading modell
  546: : docol,  ( -- ) compile :docol T 0 , H ;
  547: 
  548: : dodoes, ( -- ) T cfalign H compile :doesjump T 0 , H ;
  549: 
  550: [IFUNDEF] (code) 
  551: Defer (code)
  552: Defer (end-code)
  553: [THEN]
  554: 
  555: >TARGET
  556: : Code
  557:     (THeader there resolve
  558:     [ has-prims 0= [IF] ITC [ELSE] true [THEN] ] [IF]
  559: 	there 2 T cells H + T a, 0 , H
  560:     [THEN]
  561:     depth (code) ;
  562: 
  563: : Code:
  564:     ghost dup there resolve  <do:> swap >magic !
  565:     depth (code) ;
  566: 
  567: : end-code
  568:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  569:     ELSE true ABORT" CROSS: Stack empty" THEN
  570:     (end-code) ;
  571:                
  572: : '  ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
  573:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  574: 
  575: Cond: [']  compile lit ghost gexecute ;Cond
  576: 
  577: Cond: chars ;Cond
  578: 
  579: >CROSS
  580: \ tLiteral                                             12dec92py
  581: 
  582: : lit, ( n -- )   compile lit T  ,  H ;
  583: : alit, ( n -- )  compile lit T A,  H ;
  584: 
  585: >TARGET
  586: Cond: \G  T-\G ;Cond
  587: 
  588: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  589: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  590: 
  591: : Char ( "<char>" -- )  bl word char+ c@ ;
  592: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  593: 
  594: \ some special literals					27jan97jaw
  595: 
  596: Cond: MAXU
  597:  restrict? compile lit 
  598:  tcell 0 ?DO FF T c, H LOOP ;Cond
  599: 
  600: Cond: MINI
  601:  restrict? compile lit
  602:  bigendian IF
  603:  80 T c, H tcell 1 ?DO 0 T c, H LOOP 
  604:  ELSE
  605:  tcell 1 ?DO 0 T c, H LOOP 80 T c, H
  606:  THEN
  607:  ;Cond
  608:  
  609: Cond: MAXI
  610:  restrict? compile lit
  611:  bigendian IF
  612:  7F T c, H tcell 1 ?DO FF T c, H LOOP 
  613:  ELSE
  614:  tcell 1 ?DO FF T c, H LOOP 7F T c, H
  615:  THEN
  616:  ;Cond
  617: 
  618: >CROSS
  619: \ Target compiling loop                                12dec92py
  620: \ ">tib trick thrown out                               10may93jaw
  621: \ number? defined at the top                           11may93jaw
  622: 
  623: \ compiled word might leave items on stack!
  624: : tcom ( in name -- )
  625:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  626:                         ELSE  nip gexecute  THEN EXIT THEN
  627:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  628:                ELSE  2drop >in !
  629:                ghost gexecute THEN  ;
  630: 
  631: >TARGET
  632: \ : ; DOES>                                            13dec92py
  633: \ ]                                                     9may93py/jaw
  634: 
  635: : ] state on
  636:     BEGIN
  637:         BEGIN >in @ bl word
  638:               dup c@ 0= WHILE 2drop refill 0=
  639:               ABORT" CROSS: End of file while target compiling"
  640:         REPEAT
  641:         tcom
  642:         state @
  643:         0=
  644:     UNTIL ;
  645: 
  646: \ by the way: defining a second interpreter (a compiler-)loop
  647: \             is not allowed if a system should be ans conform
  648: 
  649: : : ( -- colon-sys ) \ Name
  650:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
  651:   (THeader ;Resolve ! there ;Resolve cell+ !
  652:   docol, depth T ] H ;
  653: 
  654: : :noname ( -- colon-sys )
  655:   T cfalign H there docol, depth T ] H ;
  656: 
  657: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  658: 
  659: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  660: 
  661: Cond: ; ( -- ) restrict?
  662:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  663:                           ELSE true ABORT" CROSS: Stack empty" THEN
  664:                compile ;S state off
  665:                ;Resolve @
  666:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  667:                ;Cond
  668: Cond: [  restrict? state off ;Cond
  669: 
  670: >CROSS
  671: : !does
  672:     tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
  673: 
  674: >TARGET
  675: Cond: DOES> restrict?
  676: 	compile (does>) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  677:         ;Cond
  678: : DOES> dodoes, T here H !does depth T ] H ;
  679: 
  680: >CROSS
  681: \ Creation                                             01nov92py
  682: 
  683: \ Builder                                               11may93jaw
  684: 
  685: : Builder    ( Create do: "name" -- )
  686:   >in @ alias2 swap dup >in ! >r >r
  687:   Make-Ghost rot swap >exec ! ,
  688:   r> r> >in !
  689:   also ghosts ' previous swap ! ;
  690: \  DOES>  dup >exec @ execute ;
  691: 
  692: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  693:     IF
  694: 	dup >magic @ <do:> =
  695: 	IF  gexecute T 0 , H  EXIT THEN
  696:     THEN
  697:     compile :dodoes gexecute T here H cell - reloff ;
  698: 
  699: : TCreate ( -- )
  700:   last-ghost @
  701:   CreateFlag on
  702:   Theader >r dup gdoes,
  703:   >end @ >exec @ r> >exec ! ;
  704: 
  705: : Build:  ( -- [xt] [colon-sys] )
  706:   :noname  postpone TCreate ;
  707: 
  708: : gdoes>  ( ghost -- addr flag )
  709:   last-ghost @
  710:   state @ IF  gexecute true EXIT  THEN
  711:   cell+ @ T >body H false ;
  712: 
  713: \ DO: ;DO                                               11may93jaw
  714: \ changed to ?EXIT                                      10may93jaw
  715: 
  716: : DO:     ( -- addr [xt] [colon-sys] )
  717:   here ghostheader
  718:   :noname postpone gdoes> postpone ?EXIT ;
  719: 
  720: : by:     ( -- addr [xt] [colon-sys] ) \ name
  721:   ghost
  722:   :noname postpone gdoes> postpone ?EXIT ;
  723: 
  724: : ;DO ( addr [xt] [colon-sys] -- )
  725:   postpone ;    ( S addr xt )
  726:   over >exec ! ; immediate
  727: 
  728: : by      ( -- addr ) \ Name
  729:   ghost >end @ ;
  730: 
  731: >TARGET
  732: \ Variables and Constants                              05dec92py
  733: 
  734: Build:  ;
  735: by: :dovar ( ghost -- addr ) ;DO
  736: Builder Create
  737: 
  738: Build: T 0 , H ;
  739: by Create
  740: Builder Variable
  741: 
  742: Build: T 0 A, H ;
  743: by Create
  744: Builder AVariable
  745: 
  746: \ User variables                                       04may94py
  747: 
  748: >CROSS
  749: Variable tup  0 tup !
  750: Variable tudp 0 tudp !
  751: : u,  ( n -- udp )
  752:   tup @ tudp @ + T  ! H
  753:   tudp @ dup T cell+ H tudp ! ;
  754: : au, ( n -- udp )
  755:   tup @ tudp @ + T A! H
  756:   tudp @ dup T cell+ H tudp ! ;
  757: >TARGET
  758: 
  759: Build: T 0 u, , H ;
  760: by: :douser ( ghost -- up-addr )  T @ H tup @ + ;DO
  761: Builder User
  762: 
  763: Build: T 0 u, , 0 u, drop H ;
  764: by User
  765: Builder 2User
  766: 
  767: Build: T 0 au, , H ;
  768: by User
  769: Builder AUser
  770: 
  771: Build:  ( n -- ) ;
  772: by: :docon ( ghost -- n ) T @ H ;DO
  773: Builder (Constant)
  774: 
  775: Build:  ( n -- ) T , H ;
  776: by (Constant)
  777: Builder Constant
  778: 
  779: Build:  ( n -- ) T A, H ;
  780: by (Constant)
  781: Builder AConstant
  782: 
  783: Build:  ( d -- ) T , , H ;
  784: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
  785: Builder 2Constant
  786: 
  787: Build: T , H ;
  788: by (Constant)
  789: Builder Value
  790: 
  791: Build: T A, H ;
  792: by (Constant)
  793: Builder AValue
  794: 
  795: Build:  ( -- ) compile noop ;
  796: by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  797: Builder Defer
  798: 
  799: Build:  ( inter comp -- ) swap T immediate A, A, H ;
  800: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  801: Builder interpret/compile:
  802: 
  803: \ Sturctures                                           23feb95py
  804: 
  805: >CROSS
  806: : nalign ( addr1 n -- addr2 )
  807: \ addr2 is the aligned version of addr1 wrt the alignment size n
  808:  1- tuck +  swap invert and ;
  809: >TARGET
  810: 
  811: Build: ;
  812: by: :dofield T @ H + ;DO
  813: Builder (Field)
  814: 
  815: Build: 	>r rot r@ nalign  dup T , H  ( align1 size offset )
  816: 	+ swap r> nalign ;
  817: by (Field)
  818: Builder Field
  819: 
  820: : struct  T 0 1 chars H ;
  821: : end-struct  T 2Constant H ;
  822: 
  823: : cells: ( n -- size align )
  824:     T cells 1 cells H ;
  825: 
  826: \ ' 2Constant Alias2 end-struct
  827: \ 0 1 T Chars H 2Constant struct
  828: 
  829: \ structural conditionals                              17dec92py
  830: 
  831: >CROSS
  832: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  833: : sys?        ( sys -- sys )    dup 0= ?struc ;
  834: : >mark       ( -- sys )        T here  0 , H ;
  835: : >resolve    ( sys -- )        T here over - swap ! H ;
  836: : <resolve    ( sys -- )        T here - , H ;
  837: >TARGET
  838: 
  839: \ Structural Conditionals                              12dec92py
  840: 
  841: Cond: BUT       restrict? sys? swap ;Cond
  842: Cond: YET       restrict? sys? dup ;Cond
  843: 
  844: >CROSS
  845: Variable tleavings
  846: >TARGET
  847: 
  848: Cond: DONE   ( addr -- )  restrict? tleavings @
  849:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  850:       tleavings ! drop ;Cond
  851: 
  852: >CROSS
  853: : (leave  T here H tleavings @ T , H  tleavings ! ;
  854: >TARGET
  855: 
  856: Cond: LEAVE     restrict? compile branch (leave ;Cond
  857: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  858: 
  859: \ Structural Conditionals                              12dec92py
  860: 
  861: Cond: AHEAD     restrict? compile branch >mark ;Cond
  862: Cond: IF        restrict? compile ?branch >mark ;Cond
  863: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  864: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  865: 
  866: Cond: BEGIN     restrict? T here H ;Cond
  867: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  868: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  869: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  870: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  871: 
  872: Cond: CASE      restrict? 0 ;Cond
  873: Cond: OF        restrict? 1+ >r compile over compile = compile IF compile drop
  874:                 r> ;Cond
  875: Cond: ENDOF     restrict? >r compile ELSE r> ;Cond
  876: Cond: ENDCASE   restrict? compile drop 0 ?DO  compile THEN  LOOP ;Cond
  877: 
  878: \ Structural Conditionals                              12dec92py
  879: 
  880: Cond: DO        restrict? compile (do)   T here H ;Cond
  881: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  882: Cond: FOR       restrict? compile (for)  T here H ;Cond
  883: 
  884: >CROSS
  885: : loop]   dup <resolve cell - compile DONE compile unloop ;
  886: >TARGET
  887: 
  888: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  889: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  890: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  891: 
  892: \ String words                                         23feb93py
  893: 
  894: : ,"            [char] " parse string, T align H ;
  895: 
  896: Cond: ."        restrict? compile (.")     T ," H ;Cond
  897: Cond: S"        restrict? compile (S")     T ," H ;Cond
  898: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  899: 
  900: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  901: : IS            T ' >body ! H ;
  902: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  903: : TO            T ' >body ! H ;
  904: 
  905: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  906: 
  907: \ linked list primitive
  908: : linked        T here over @ A, swap ! H ;
  909: 
  910: : err"   s" ErrLink linked" evaluate T , H
  911:          [char] " parse string, T align H ;
  912: 
  913: : env"  [char] " parse s" EnvLink linked" evaluate
  914:         string, T align , H ;
  915: 
  916: : 2env" [char] " parse s" EnvLink linked" evaluate
  917:         here >r string, T align , , H
  918:         r> dup T c@ H 80 and swap T c! H ;
  919: 
  920: \ compile must be last                                 22feb93py
  921: 
  922: Cond: compile ( -- ) restrict? \ name
  923:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  924:       0> IF    gexecute
  925:          ELSE  dup >magic @ <imm> =
  926:                IF   gexecute
  927:                ELSE compile (compile) gexecute THEN THEN ;Cond
  928: 
  929: Cond: postpone ( -- ) restrict? \ name
  930:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  931:       0> IF    gexecute
  932:          ELSE  dup >magic @ <imm> =
  933:                IF   gexecute
  934:                ELSE compile (compile) gexecute THEN THEN ;Cond
  935: 
  936: >MINIMAL
  937: also minimal
  938: \ Usefull words                                        13feb93py
  939: 
  940: : KB  400 * ;
  941: 
  942: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  943: 
  944: : defined? defined? ;
  945: : needed? needed? ;
  946: : doer? doer? ;
  947: 
  948: : [IFDEF] defined? postpone [IF] ;
  949: : [IFUNDEF] defined? 0= postpone [IF] ;
  950: 
  951: \ C: \- \+ Conditional Compiling                         09jun93jaw
  952: 
  953: : C: >in @ defined? 0=
  954:      IF    >in ! T : H
  955:      ELSE drop
  956:         BEGIN bl word dup c@
  957:               IF   count comment? s" ;" compare 0= ?EXIT
  958:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  959:               THEN
  960:         AGAIN
  961:      THEN ;
  962: 
  963: also minimal
  964: 
  965: : \- defined? IF postpone \ THEN ;
  966: : \+ defined? 0= IF postpone \ THEN ;
  967: 
  968: : [IF]   postpone [IF] ;
  969: : [THEN] postpone [THEN] ;
  970: : [ELSE] postpone [ELSE] ;
  971: 
  972: Cond: [IF]      [IF] ;Cond
  973: Cond: [IFDEF]   [IFDEF] ;Cond
  974: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  975: Cond: [THEN]    [THEN] ;Cond
  976: Cond: [ELSE]    [ELSE] ;Cond
  977: 
  978: \ save-cross                                           17mar93py
  979: 
  980: \ i'm not interested in bigforth features this time    10may93jaw
  981: \ [IFDEF] file
  982: \ also file
  983: \ [THEN]
  984: \ included throw after create-file                     11may93jaw
  985: 
  986: bigendian Constant bigendian
  987: 
  988: Create magic  s" Gforth10" here over allot swap move
  989: 
  990: char 1 bigendian + cell + magic 7 + c!
  991: 
  992: : save-cross ( "image-name" "binary-name" -- )
  993:   bl parse ." Saving to " 2dup type cr
  994:   w/o bin create-file throw >r
  995:   NIL IF
  996:       s" #! "   r@ write-file throw
  997:       bl parse  r@ write-file throw
  998:       s"  -i"   r@ write-file throw
  999:       #lf       r@ emit-file throw
 1000:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
 1001:       ?do
 1002: 	  bl over emit-file throw
 1003:       loop
 1004:       drop
 1005:       magic 8       r@ write-file throw \ write magic
 1006:   ELSE
 1007:       bl parse 2drop
 1008:   THEN
 1009:   image @ there r@ write-file throw \ write image
 1010:   NIL IF
 1011:       bit$  @ there 1- cell>bit rshift 1+
 1012:                 r@ write-file throw \ write tags
 1013:   THEN
 1014:   r> close-file throw ;
 1015: 
 1016: \ words that should be in minimal
 1017: 
 1018: : here there ;
 1019: also forth [IFDEF] Label : Label Label ; [THEN] previous
 1020: : + + ;
 1021: : or or ;
 1022: : 1- 1- ;
 1023: : - - ;
 1024: : 2* 2* ;
 1025: : * * ;
 1026: : / / ;
 1027: : dup dup ;
 1028: : over over ;
 1029: : swap swap ;
 1030: : rot rot ;
 1031: : drop drop ;
 1032: : =   = ;
 1033: : 0=   0= ;
 1034: : lshift lshift ;
 1035: : 2/ 2/ ;
 1036: : . . ;
 1037: 
 1038: mach-file count included
 1039: 
 1040: : all-words    ['] false    IS skip? ;
 1041: : needed-words ['] needed?  IS skip? ;
 1042: : undef-words  ['] defined? IS skip? ;
 1043: 
 1044: : \  postpone \ ;  immediate
 1045: : \G T-\G ; immediate
 1046: : (  postpone ( ;  immediate
 1047: : include bl word count included ;
 1048: : .( [char] ) parse type ;
 1049: : cr cr ;
 1050: 
 1051: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
 1052: only forth also minimal definitions
 1053: 
 1054: \ cross-compiler words
 1055: 
 1056: : decimal       decimal ;
 1057: : hex           hex ;
 1058: 
 1059: : tudp          T tudp H ;
 1060: : tup           T tup H ;
 1061: 
 1062: : doc-off       false T to-doc H ! ;
 1063: : doc-on        true  T to-doc H ! ;
 1064: 
 1065: minimal
 1066: 
 1067: \ for debugging...
 1068: : order         order ;
 1069: : words         words ;
 1070: : .s            .s ;
 1071: 
 1072: : bye           bye ;
 1073: 
 1074: \ turnkey direction
 1075: : H forth ; immediate
 1076: : T minimal ; immediate
 1077: : G ghosts ; immediate
 1078: 
 1079: : turnkey  0 set-order also Target definitions
 1080:            also Minimal also ;
 1081: 
 1082: \ these ones are pefered:
 1083: 
 1084: : lock   turnkey ;
 1085: : unlock forth also cross ;
 1086: 
 1087: unlock definitions also minimal
 1088: : lock   lock ;
 1089: lock

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