File:  [gforth] / gforth / cross.fs
Revision 1.44: download - view: text, annotated - select for diffs
Sun Feb 9 21:51:38 1997 UTC (22 years, 9 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
A few additional fixes. gforth EC should run now with only three
doers: docol, dovar and dodoes. Tried without dovar, failed (strange).

    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: 
  104: >CROSS
  105: 
  106: \ Variables                                            06oct92py
  107: 
  108: Variable image
  109: Variable tlast    NIL tlast !  \ Last name field
  110: Variable tlastcfa \ Last code field
  111: Variable tdoes    \ Resolve does> calls
  112: Variable bit$
  113: Variable tdp
  114: : there  tdp @ ;
  115: 
  116: \ Create additional parameters                         19jan95py
  117: 
  118: T
  119: cell               Constant tcell
  120: cell<<             Constant tcell<<
  121: cell>bit           Constant tcell>bit
  122: bits/byte          Constant tbits/byte
  123: float              Constant tfloat
  124: 1 bits/byte lshift Constant maxbyte
  125: H
  126: 
  127: >TARGET
  128: 
  129: \ Byte ordering and cell size                          06oct92py
  130: 
  131: : cell+         tcell + ;
  132: : cells         tcell<< lshift ;
  133: : chars         ;
  134: : floats	tfloat * ;
  135:     
  136: >CROSS
  137: : cell/         tcell<< rshift ;
  138: >TARGET
  139: 20 CONSTANT bl
  140: -1 Constant NIL
  141: 
  142: >CROSS
  143: 
  144: bigendian
  145: [IF]
  146:    : T!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
  147:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
  148:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds
  149:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
  150: [ELSE]
  151:    : T!  ( n addr -- )  >r s>d r> tcell bounds
  152:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
  153:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
  154:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
  155: [THEN]
  156: 
  157: \ Memory initialisation                                05dec92py
  158: \ Fixed bug in else part                               11may93jaw
  159: 
  160: [IFDEF] Memory \ Memory is a bigFORTH feature
  161:    also Memory
  162:    : initmem ( var len -- )
  163:      2dup swap handle! >r @ r> erase ;
  164:    toss
  165: [ELSE]
  166:    : initmem ( var len -- )
  167:      tuck allocate abort" CROSS: No memory for target"
  168:      ( len var adr ) dup rot !
  169:      ( len adr ) swap erase ;
  170: [THEN]
  171: 
  172: \ MakeKernal                                           12dec92py
  173: 
  174: >MINIMAL
  175: : makekernel ( targetsize -- targetsize )
  176:   bit$  over 1- cell>bit rshift 1+ initmem
  177:   image over initmem tdp off ;
  178: 
  179: >CROSS
  180: \ Bit string manipulation                               06oct92py
  181: \                                                       9may93jaw
  182: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  183: : bits ( n -- n ) chars Bittable + c@ ;
  184: 
  185: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  186: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  187: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  188: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  189: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  190: 
  191: \ Target memory access                                 06oct92py
  192: 
  193: : align+  ( taddr -- rest )
  194:     cell tuck 1- and - [ cell 1- ] Literal and ;
  195: : cfalign+  ( taddr -- rest )
  196:     \ see kernel.fs:cfaligned
  197:     /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;
  198: 
  199: >TARGET
  200: : aligned ( taddr -- ta-addr )  dup align+ + ;
  201: \ assumes cell alignment granularity (as GNU C)
  202: 
  203: : cfaligned ( taddr1 -- taddr2 )
  204:     \ see kernel.fs
  205:     dup cfalign+ + ;
  206: 
  207: >CROSS
  208: : >image ( taddr -- absaddr )  image @ + ;
  209: >TARGET
  210: : @  ( taddr -- w )     >image t@ ;
  211: : !  ( w taddr -- )     >image t! ;
  212: : c@ ( taddr -- char )  >image c@ ;
  213: : c! ( char taddr -- )  >image c! ;
  214: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  215: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  216: 
  217: \ Target compilation primitives                        06oct92py
  218: \ included A!                                          16may93jaw
  219: 
  220: : here  ( -- there )    there ;
  221: : allot ( n -- )        tdp +! ;
  222: : ,     ( w -- )        T here H cell T allot  ! H ;
  223: : c,    ( char -- )     T here    1 allot c! H ;
  224: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  225: : cfalign ( -- )
  226:     T here H cfalign+ 0 ?DO  bl T c, H LOOP ;
  227: 
  228: : A!                    dup relon T ! H ;
  229: : A,    ( w -- )        T here H relon T , H ;
  230: 
  231: >CROSS
  232: 
  233: \ threading modell                                     13dec92py
  234: 
  235: >TARGET
  236: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  237: >CROSS
  238: 
  239: \ Ghost Builder                                        06oct92py
  240: 
  241: \ <T T> new version with temp variable                 10may93jaw
  242: 
  243: VARIABLE VocTemp
  244: 
  245: : <T  get-current VocTemp ! also Ghosts definitions ;
  246: : T>  previous VocTemp @ set-current ;
  247: 
  248: 4711 Constant <fwd>             4712 Constant <res>
  249: 4713 Constant <imm>             4714 Constant <do:>
  250: 
  251: \ iForth makes only immediate directly after create
  252: \ make atonce trick! ?
  253: 
  254: Variable atonce atonce off
  255: 
  256: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  257: 
  258: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  259: 
  260: : >magic ;
  261: : >link cell+ ;
  262: : >exec cell+ cell+ ;
  263: : >end 3 cells + ;
  264: 
  265: Variable last-ghost
  266: : Make-Ghost ( "name" -- ghost )
  267:   >in @ GhostName swap >in !
  268:   <T Create atonce @ IF immediate atonce off THEN
  269:   here tuck swap ! ghostheader T>
  270:   DOES> dup last-ghost ! >exec @ execute ;
  271: 
  272: \ ghost words                                          14oct92py
  273: \                                          changed:    10may93py/jaw
  274: 
  275: : gfind   ( string -- ghost true/1 / string false )
  276: \ searches for string in word-list ghosts
  277:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  278:   dup IF >r >body nip r>  THEN ;
  279: 
  280: VARIABLE Already
  281: 
  282: : ghost   ( "name" -- ghost )
  283:   Already off
  284:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  285:   drop  >in !  Make-Ghost ;
  286: 
  287: \ resolve                                              14oct92py
  288: 
  289: : resolve-loop ( ghost tcfa -- ghost tcfa )
  290:   >r dup >link @
  291:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  292: 
  293: \ exists                                                9may93jaw
  294: 
  295: : exists ( ghost tcfa -- )
  296:   over GhostNames
  297:   BEGIN @ dup
  298:   WHILE 2dup cell+ @ =
  299:   UNTIL
  300:         2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
  301:         swap cell+ !
  302:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  303:   THEN ;
  304: 
  305: : resolve  ( ghost tcfa -- )
  306:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  307:   resolve-loop  over >link ! <res> swap >magic ! ;
  308: 
  309: \ gexecute ghost,                                      01nov92py
  310: 
  311: : do-forward   ( ghost -- )
  312:   >link dup @  there rot !  T  A,  H ;
  313: : do-resolve   ( ghost -- )
  314:   >link @                   T  A,  H ;
  315: 
  316: : gexecute   ( ghost -- )   dup @
  317:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  318: : ghost,     ghost  gexecute ;
  319: 
  320: \ .unresolved                                          11may93jaw
  321: 
  322: variable ResolveFlag
  323: 
  324: \ ?touched                                             11may93jaw
  325: 
  326: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  327:                                0 <> and ;
  328: 
  329: : ?resolved  ( ghostname -- )
  330:   dup cell+ @ ?touched
  331:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  332: 
  333: >MINIMAL
  334: : .unresolved  ( -- )
  335:   ResolveFlag off cr ." Unresolved: "
  336:   Ghostnames
  337:   BEGIN @ dup
  338:   WHILE dup ?resolved
  339:   REPEAT drop ResolveFlag @
  340:   IF
  341:       abort" Unresolved words!"
  342:   ELSE
  343:       ." Nothing!"
  344:   THEN
  345:   cr ;
  346: 
  347: >CROSS
  348: \ Header states                                        12dec92py
  349: 
  350: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  351: 
  352: VARIABLE ^imm
  353: 
  354: >TARGET
  355: : immediate     40 flag!
  356:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  357:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  358:                 <imm> ^imm @ ! ;
  359: : restrict      20 flag! ;
  360: >CROSS
  361: 
  362: \ ALIAS2 ansforth conform alias                          9may93jaw
  363: 
  364: : ALIAS2 create here 0 , DOES> @ execute ;
  365: \ usage:
  366: \ ' <name> alias2 bla !
  367: 
  368: \ Target Header Creation                               01nov92py
  369: 
  370: : string,  ( addr count -- )
  371:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  372: : name,  ( "name" -- )  bl word count string, T cfalign H ;
  373: : view,   ( -- ) ( dummy ) ;
  374: 
  375: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  376: 
  377: s" crossdoc.fd" r/w create-file throw value doc-file-id
  378: \ contains the file-id of the documentation file
  379: 
  380: : T-\G ( -- )
  381:     source >in @ /string doc-file-id write-line throw
  382:     postpone \ ;
  383: 
  384: Variable to-doc  to-doc on
  385: 
  386: : cross-doc-entry  ( -- )
  387:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
  388:     IF
  389: 	s" " doc-file-id write-line throw
  390: 	s" make-doc " doc-file-id write-file throw
  391: 	tlast @ >image count $1F and doc-file-id write-file throw
  392: 	>in @
  393: 	[char] ( parse 2drop
  394: 	[char] ) parse doc-file-id write-file throw
  395: 	s"  )" doc-file-id write-file throw
  396: 	[char] \ parse 2drop					
  397: 	T-\G
  398: 	>in !
  399:     THEN ;
  400: 
  401: \ Target TAGS creation
  402: 
  403: s" kernel.TAGS" r/w create-file throw value tag-file-id
  404: \ contains the file-id of the tags file
  405: 
  406: Create tag-beg 2 c,  7F c, bl c,
  407: Create tag-end 2 c,  bl c, 01 c,
  408: Create tag-bof 1 c,  0C c,
  409: 
  410: 2variable last-loadfilename 0 0 last-loadfilename 2!
  411: 	    
  412: : put-load-file-name ( -- )
  413:     loadfilename 2@ last-loadfilename 2@ d<>
  414:     IF
  415: 	tag-bof count tag-file-id write-line throw
  416: 	sourcefilename 2dup
  417: 	tag-file-id write-file throw
  418: 	last-loadfilename 2!
  419: 	s" ,0" tag-file-id write-line throw
  420:     THEN ;
  421: 
  422: : cross-tag-entry  ( -- )
  423:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
  424:     IF
  425: 	put-load-file-name
  426: 	source >in @ min tag-file-id write-file throw
  427: 	tag-beg count tag-file-id write-file throw
  428: 	tlast @ >image count $1F and tag-file-id write-file throw
  429: 	tag-end count tag-file-id write-file throw
  430: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
  431: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
  432: 	s" ,0" tag-file-id write-line throw
  433: 	base !
  434:     THEN ;
  435: 
  436: \ Check for words
  437: 
  438: Defer skip? ' false IS skip?
  439: 
  440: : defined? ( -- flag ) \ name
  441:     ghost >magic @ <fwd> <> ;
  442: 
  443: : needed? ( -- flag ) \ name
  444:     ghost dup >magic @ <fwd> =
  445:     IF  >link @ 0<>  ELSE  drop false  THEN ;
  446: 
  447: : doer? ( -- flag ) \ name
  448:     ghost >magic @ <do:> = ;
  449: 
  450: : skip-defs ( -- )
  451:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
  452: 
  453: \ Target header creation
  454: 
  455: VARIABLE CreateFlag CreateFlag off
  456: 
  457: : (Theader ( "name" -- ghost )
  458: \  >in @ bl word count type 2 spaces >in !
  459:   T align H view,
  460:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  461:   >in @ name, >in ! T here H tlastcfa !
  462:   CreateFlag @ IF
  463:        >in @ alias2 swap >in !         \ create alias in target
  464:        >in @ ghost swap >in !
  465:        swap also ghosts ' previous swap !     \ tick ghost and store in alias
  466:        CreateFlag off
  467:   ELSE ghost THEN
  468:   dup >magic ^imm !     \ a pointer for immediate
  469:   Already @ IF  dup >end tdoes !
  470:   ELSE 0 tdoes ! THEN
  471:   80 flag!
  472:   cross-doc-entry cross-tag-entry ;
  473: 
  474: VARIABLE ;Resolve 1 cells allot
  475: 
  476: : Theader  ( "name" -- ghost )
  477:   (THeader dup there resolve 0 ;Resolve ! ;
  478: 
  479: >TARGET
  480: : Alias    ( cfa -- ) \ name
  481:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  482:     dup 0< has-prims 0= and
  483:     IF
  484: 	." needs prim: " >in @ bl word count type >in ! cr
  485:     THEN
  486:     (THeader over resolve T A, H 80 flag! ;
  487: : Alias:   ( cfa -- ) \ name
  488:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  489:     dup 0< has-prims 0= and
  490:     IF
  491: 	." needs doer: " >in @ bl word count type >in ! cr
  492:     THEN
  493:     ghost tuck swap resolve <do:> swap >magic ! ;
  494: >CROSS
  495: 
  496: \ Conditionals and Comments                            11may93jaw
  497: 
  498: : ;Cond
  499:   postpone ;
  500:   swap ! ;  immediate
  501: 
  502: : Cond: ( -- ) \ name {code } ;
  503:   atonce on
  504:   ghost
  505:   >exec
  506:   :NONAME ;
  507: 
  508: : restrict? ( -- )
  509: \ aborts on interprete state - ae
  510:   state @ 0= ABORT" CROSS: Restricted" ;
  511: 
  512: : Comment ( -- )
  513:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  514: 
  515: Comment (       Comment \
  516: 
  517: \ Predefined ghosts                                    12dec92py
  518: 
  519: ghost 0=                                        drop
  520: ghost branch    ghost ?branch                   2drop
  521: ghost (do)      ghost (?do)                     2drop
  522: ghost (for)                                     drop
  523: ghost (loop)    ghost (+loop)                   2drop
  524: ghost (next)                                    drop
  525: ghost unloop    ghost ;S                        2drop
  526: ghost lit       ghost (compile) ghost !         2drop drop
  527: ghost (does>)   ghost noop                      2drop
  528: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  529: ghost '                                         drop
  530: ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
  531: 
  532: \ compile                                              10may93jaw
  533: 
  534: : compile  ( -- ) \ name
  535:   restrict?
  536:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
  537:   0> ( immediate? )
  538:   IF    >exec @ compile,
  539:   ELSE  postpone literal postpone gexecute  THEN ;
  540:                                         immediate
  541: 
  542: \ generic threading modell
  543: : docol,  ( -- ) compile :docol T 0 , H ;
  544: 
  545: : dodoes, ( -- ) compile :doesjump T 0 , H ;
  546: 
  547: [IFUNDEF] (code) 
  548: Defer (code)
  549: Defer (end-code)
  550: [THEN]
  551: 
  552: >TARGET
  553: : Code
  554:     (THeader there resolve
  555:     there 2 T cells H + T a, 0 , H
  556:     depth (code) ;
  557: 
  558: : Code:
  559:     ghost dup there resolve  <do:> swap >magic !
  560:     depth (code) ;
  561: 
  562: : end-code
  563:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  564:     ELSE true ABORT" CROSS: Stack empty" THEN
  565:     (end-code) ;
  566:                
  567: : '  ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
  568:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  569: 
  570: Cond: [']  compile lit ghost gexecute ;Cond
  571: 
  572: Cond: chars ;Cond
  573: 
  574: >CROSS
  575: \ tLiteral                                             12dec92py
  576: 
  577: : lit, ( n -- )   compile lit T  ,  H ;
  578: : alit, ( n -- )  compile lit T A,  H ;
  579: 
  580: >TARGET
  581: Cond: \G  T-\G ;Cond
  582: 
  583: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  584: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  585: 
  586: : Char ( "<char>" -- )  bl word char+ c@ ;
  587: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  588: 
  589: \ some special literals					27jan97jaw
  590: 
  591: Cond: MAXU
  592:  restrict? compile lit 
  593:  tcell 0 ?DO FF T c, H LOOP ;Cond
  594: 
  595: Cond: MINI
  596:  restrict? compile lit
  597:  bigendian IF
  598:  80 T c, H tcell 1 ?DO 0 T c, H LOOP 
  599:  ELSE
  600:  tcell 1 ?DO 0 T c, H LOOP 80 T c, H
  601:  THEN
  602:  ;Cond
  603:  
  604: Cond: MAXI
  605:  restrict? compile lit
  606:  bigendian IF
  607:  7F T c, H tcell 1 ?DO FF T c, H LOOP 
  608:  ELSE
  609:  tcell 1 ?DO FF T c, H LOOP 7F T c, H
  610:  THEN
  611:  ;Cond
  612: 
  613: >CROSS
  614: \ Target compiling loop                                12dec92py
  615: \ ">tib trick thrown out                               10may93jaw
  616: \ number? defined at the top                           11may93jaw
  617: 
  618: \ compiled word might leave items on stack!
  619: : tcom ( in name -- )
  620:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  621:                         ELSE  nip gexecute  THEN EXIT THEN
  622:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  623:                ELSE  2drop >in !
  624:                ghost gexecute THEN  ;
  625: 
  626: >TARGET
  627: \ : ; DOES>                                            13dec92py
  628: \ ]                                                     9may93py/jaw
  629: 
  630: : ] state on
  631:     BEGIN
  632:         BEGIN >in @ bl word
  633:               dup c@ 0= WHILE 2drop refill 0=
  634:               ABORT" CROSS: End of file while target compiling"
  635:         REPEAT
  636:         tcom
  637:         state @
  638:         0=
  639:     UNTIL ;
  640: 
  641: \ by the way: defining a second interpreter (a compiler-)loop
  642: \             is not allowed if a system should be ans conform
  643: 
  644: : : ( -- colon-sys ) \ Name
  645:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
  646:   (THeader ;Resolve ! there ;Resolve cell+ !
  647:   docol, depth T ] H ;
  648: 
  649: : :noname ( -- colon-sys )
  650:   T align H there docol, depth T ] H ;
  651: 
  652: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  653: 
  654: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  655: 
  656: Cond: ; ( -- ) restrict?
  657:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  658:                           ELSE true ABORT" CROSS: Stack empty" THEN
  659:                compile ;S state off
  660:                ;Resolve @
  661:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  662:                ;Cond
  663: Cond: [  restrict? state off ;Cond
  664: 
  665: >CROSS
  666: : !does
  667:     tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
  668: 
  669: >TARGET
  670: Cond: DOES> restrict?
  671:         compile (does>) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  672:         ;Cond
  673: : DOES> dodoes, T here H !does depth T ] H ;
  674: 
  675: >CROSS
  676: \ Creation                                             01nov92py
  677: 
  678: \ Builder                                               11may93jaw
  679: 
  680: : Builder    ( Create do: "name" -- )
  681:   >in @ alias2 swap dup >in ! >r >r
  682:   Make-Ghost rot swap >exec ! ,
  683:   r> r> >in !
  684:   also ghosts ' previous swap ! ;
  685: \  DOES>  dup >exec @ execute ;
  686: 
  687: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  688:     IF
  689: 	dup >magic @ <do:> =
  690: 	IF  gexecute T 0 , H  EXIT THEN
  691:     THEN
  692:     compile :dodoes gexecute T here H cell - reloff ;
  693: 
  694: : TCreate ( -- )
  695:   last-ghost @
  696:   CreateFlag on
  697:   Theader >r dup gdoes,
  698:   >end @ >exec @ r> >exec ! ;
  699: 
  700: : Build:  ( -- [xt] [colon-sys] )
  701:   :noname  postpone TCreate ;
  702: 
  703: : gdoes>  ( ghost -- addr flag )
  704:   last-ghost @
  705:   state @ IF  gexecute true EXIT  THEN
  706:   cell+ @ T >body H false ;
  707: 
  708: \ DO: ;DO                                               11may93jaw
  709: \ changed to ?EXIT                                      10may93jaw
  710: 
  711: : DO:     ( -- addr [xt] [colon-sys] )
  712:   here ghostheader
  713:   :noname postpone gdoes> postpone ?EXIT ;
  714: 
  715: : by:     ( -- addr [xt] [colon-sys] ) \ name
  716:   ghost
  717:   :noname postpone gdoes> postpone ?EXIT ;
  718: 
  719: : ;DO ( addr [xt] [colon-sys] -- )
  720:   postpone ;    ( S addr xt )
  721:   over >exec ! ; immediate
  722: 
  723: : by      ( -- addr ) \ Name
  724:   ghost >end @ ;
  725: 
  726: >TARGET
  727: \ Variables and Constants                              05dec92py
  728: 
  729: Build:  ;
  730: by: :dovar ( ghost -- addr ) ;DO
  731: Builder Create
  732: 
  733: Build: T 0 , H ;
  734: by Create
  735: Builder Variable
  736: 
  737: Build: T 0 A, H ;
  738: by Create
  739: Builder AVariable
  740: 
  741: \ User variables                                       04may94py
  742: 
  743: >CROSS
  744: Variable tup  0 tup !
  745: Variable tudp 0 tudp !
  746: : u,  ( n -- udp )
  747:   tup @ tudp @ + T  ! H
  748:   tudp @ dup T cell+ H tudp ! ;
  749: : au, ( n -- udp )
  750:   tup @ tudp @ + T A! H
  751:   tudp @ dup T cell+ H tudp ! ;
  752: >TARGET
  753: 
  754: Build: T 0 u, , H ;
  755: by: :douser ( ghost -- up-addr )  T @ H tup @ + ;DO
  756: Builder User
  757: 
  758: Build: T 0 u, , 0 u, drop H ;
  759: by User
  760: Builder 2User
  761: 
  762: Build: T 0 au, , H ;
  763: by User
  764: Builder AUser
  765: 
  766: Build:  ( n -- ) ;
  767: by: :docon ( ghost -- n ) T @ H ;DO
  768: Builder (Constant)
  769: 
  770: Build:  ( n -- ) T , H ;
  771: by (Constant)
  772: Builder Constant
  773: 
  774: Build:  ( n -- ) T A, H ;
  775: by (Constant)
  776: Builder AConstant
  777: 
  778: Build:  ( d -- ) T , , H ;
  779: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
  780: Builder 2Constant
  781: 
  782: Build: T 0 , H ;
  783: by (Constant)
  784: Builder Value
  785: 
  786: Build: T 0 A, H ;
  787: by (Constant)
  788: Builder AValue
  789: 
  790: Build:  ( -- ) compile noop ;
  791: by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  792: Builder Defer
  793: 
  794: Build:  ( inter comp -- ) swap T immediate A, A, H ;
  795: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  796: Builder interpret/compile:
  797: 
  798: \ Sturctures                                           23feb95py
  799: 
  800: >CROSS
  801: : nalign ( addr1 n -- addr2 )
  802: \ addr2 is the aligned version of addr1 wrt the alignment size n
  803:  1- tuck +  swap invert and ;
  804: >TARGET
  805: 
  806: Build: ;
  807: by: :dofield T @ H + ;DO
  808: Builder (Field)
  809: 
  810: Build: 	>r rot r@ nalign  dup T , H  ( align1 size offset )
  811: 	+ swap r> nalign ;
  812: by (Field)
  813: Builder Field
  814: 
  815: : struct  T 0 1 chars H ;
  816: : end-struct  T 2Constant H ;
  817: 
  818: : cells: ( n -- size align )
  819:     T cells 1 cells H ;
  820: 
  821: \ ' 2Constant Alias2 end-struct
  822: \ 0 1 T Chars H 2Constant struct
  823: 
  824: \ structural conditionals                              17dec92py
  825: 
  826: >CROSS
  827: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  828: : sys?        ( sys -- sys )    dup 0= ?struc ;
  829: : >mark       ( -- sys )        T here  0 , H ;
  830: : >resolve    ( sys -- )        T here over - swap ! H ;
  831: : <resolve    ( sys -- )        T here - , H ;
  832: >TARGET
  833: 
  834: \ Structural Conditionals                              12dec92py
  835: 
  836: Cond: BUT       restrict? sys? swap ;Cond
  837: Cond: YET       restrict? sys? dup ;Cond
  838: 
  839: >CROSS
  840: Variable tleavings
  841: >TARGET
  842: 
  843: Cond: DONE   ( addr -- )  restrict? tleavings @
  844:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  845:       tleavings ! drop ;Cond
  846: 
  847: >CROSS
  848: : (leave  T here H tleavings @ T , H  tleavings ! ;
  849: >TARGET
  850: 
  851: Cond: LEAVE     restrict? compile branch (leave ;Cond
  852: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  853: 
  854: \ Structural Conditionals                              12dec92py
  855: 
  856: Cond: AHEAD     restrict? compile branch >mark ;Cond
  857: Cond: IF        restrict? compile ?branch >mark ;Cond
  858: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  859: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  860: 
  861: Cond: BEGIN     restrict? T here H ;Cond
  862: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  863: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  864: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  865: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  866: 
  867: \ Structural Conditionals                              12dec92py
  868: 
  869: Cond: DO        restrict? compile (do)   T here H ;Cond
  870: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  871: Cond: FOR       restrict? compile (for)  T here H ;Cond
  872: 
  873: >CROSS
  874: : loop]   dup <resolve cell - compile DONE compile unloop ;
  875: >TARGET
  876: 
  877: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  878: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  879: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  880: 
  881: \ String words                                         23feb93py
  882: 
  883: : ,"            [char] " parse string, T align H ;
  884: 
  885: Cond: ."        restrict? compile (.")     T ," H ;Cond
  886: Cond: S"        restrict? compile (S")     T ," H ;Cond
  887: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  888: 
  889: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  890: : IS            T ' >body ! H ;
  891: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  892: : TO            T ' >body ! H ;
  893: 
  894: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  895: 
  896: \ linked list primitive
  897: : linked        T here over @ A, swap ! H ;
  898: 
  899: : err"   s" ErrLink linked" evaluate T , H
  900:          [char] " parse string, T align H ;
  901: 
  902: : env"  [char] " parse s" EnvLink linked" evaluate
  903:         string, T align , H ;
  904: 
  905: : 2env" [char] " parse s" EnvLink linked" evaluate
  906:         here >r string, T align , , H
  907:         r> dup T c@ H 80 and swap T c! H ;
  908: 
  909: \ compile must be last                                 22feb93py
  910: 
  911: Cond: compile ( -- ) restrict? \ name
  912:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  913:       0> IF    gexecute
  914:          ELSE  dup >magic @ <imm> =
  915:                IF   gexecute
  916:                ELSE compile (compile) gexecute THEN THEN ;Cond
  917: 
  918: Cond: postpone ( -- ) restrict? \ name
  919:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  920:       0> IF    gexecute
  921:          ELSE  dup >magic @ <imm> =
  922:                IF   gexecute
  923:                ELSE compile (compile) gexecute THEN THEN ;Cond
  924: 
  925: >MINIMAL
  926: also minimal
  927: \ Usefull words                                        13feb93py
  928: 
  929: : KB  400 * ;
  930: 
  931: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  932: 
  933: : defined? defined? ;
  934: : needed? needed? ;
  935: : doer? doer? ;
  936: 
  937: : [IFDEF] defined? postpone [IF] ;
  938: : [IFUNDEF] defined? 0= postpone [IF] ;
  939: 
  940: \ C: \- \+ Conditional Compiling                         09jun93jaw
  941: 
  942: : C: >in @ defined? 0=
  943:      IF    >in ! T : H
  944:      ELSE drop
  945:         BEGIN bl word dup c@
  946:               IF   count comment? s" ;" compare 0= ?EXIT
  947:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  948:               THEN
  949:         AGAIN
  950:      THEN ;
  951: 
  952: also minimal
  953: 
  954: : \- defined? IF postpone \ THEN ;
  955: : \+ defined? 0= IF postpone \ THEN ;
  956: 
  957: : [IF]   postpone [IF] ;
  958: : [THEN] postpone [THEN] ;
  959: : [ELSE] postpone [ELSE] ;
  960: 
  961: Cond: [IF]      [IF] ;Cond
  962: Cond: [IFDEF]   [IFDEF] ;Cond
  963: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  964: Cond: [THEN]    [THEN] ;Cond
  965: Cond: [ELSE]    [ELSE] ;Cond
  966: 
  967: \ save-cross                                           17mar93py
  968: 
  969: \ i'm not interested in bigforth features this time    10may93jaw
  970: \ [IFDEF] file
  971: \ also file
  972: \ [THEN]
  973: \ included throw after create-file                     11may93jaw
  974: 
  975: bigendian Constant bigendian
  976: 
  977: Create magic  s" Gforth10" here over allot swap move
  978: 
  979: char 1 bigendian + cell + magic 7 + c!
  980: 
  981: : save-cross ( "image-name" "binary-name" -- )
  982:   bl parse ." Saving to " 2dup type cr
  983:   w/o bin create-file throw >r
  984:   NIL IF
  985:       s" #! "   r@ write-file throw
  986:       bl parse  r@ write-file throw
  987:       s"  -i"   r@ write-file throw
  988:       #lf       r@ emit-file throw
  989:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
  990:       ?do
  991: 	  bl over emit-file throw
  992:       loop
  993:       drop
  994:       magic 8       r@ write-file throw \ write magic
  995:   ELSE
  996:       bl parse 2drop
  997:   THEN
  998:   image @ there r@ write-file throw \ write image
  999:   NIL IF
 1000:       bit$  @ there 1- cell>bit rshift 1+
 1001:                 r@ write-file throw \ write tags
 1002:   THEN
 1003:   r> close-file throw ;
 1004: 
 1005: \ words that should be in minimal
 1006: 
 1007: : here there ;
 1008: also forth [IFDEF] Label : Label Label ; [THEN] previous
 1009: : + + ;
 1010: : or or ;
 1011: : 1- 1- ;
 1012: : - - ;
 1013: : 2* 2* ;
 1014: : * * ;
 1015: : / / ;
 1016: : dup dup ;
 1017: : over over ;
 1018: : swap swap ;
 1019: : rot rot ;
 1020: : drop drop ;
 1021: : =   = ;
 1022: : 0=   0= ;
 1023: : lshift lshift ;
 1024: : 2/ 2/ ;
 1025: : . . ;
 1026: 
 1027: mach-file count included
 1028: 
 1029: : all-words    ['] false    IS skip? ;
 1030: : needed-words ['] needed?  IS skip? ;
 1031: : undef-words  ['] defined? IS skip? ;
 1032: 
 1033: : \  postpone \ ;  immediate
 1034: : (  postpone ( ;  immediate
 1035: : include bl word count included ;
 1036: : .( [char] ) parse type ;
 1037: : cr cr ;
 1038: 
 1039: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
 1040: only forth also minimal definitions
 1041: 
 1042: \ cross-compiler words
 1043: 
 1044: : decimal       decimal ;
 1045: : hex           hex ;
 1046: 
 1047: : tudp          T tudp H ;
 1048: : tup           T tup H ;
 1049: 
 1050: : doc-off       false T to-doc H ! ;
 1051: : doc-on        true  T to-doc H ! ;
 1052: 
 1053: minimal
 1054: 
 1055: \ for debugging...
 1056: : order         order ;
 1057: : words         words ;
 1058: : .s            .s ;
 1059: 
 1060: : bye           bye ;
 1061: 
 1062: \ turnkey direction
 1063: : H forth ; immediate
 1064: : T minimal ; immediate
 1065: : G ghosts ; immediate
 1066: 
 1067: : turnkey  0 set-order also Target definitions
 1068:            also Minimal also ;
 1069: 
 1070: \ these ones are pefered:
 1071: 
 1072: : lock   turnkey ;
 1073: : unlock forth also cross ;
 1074: 
 1075: unlock definitions also minimal
 1076: : lock   lock ;
 1077: lock

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