File:  [gforth] / gforth / cross.fs
Revision 1.39: download - view: text, annotated - select for diffs
Thu Sep 19 22:17:31 1996 UTC (23 years, 2 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Steps to make 0.2.0 dist-ready.

    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: : 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:     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 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: \ 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:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  282:   dup IF >r >body nip r>  THEN ;
  283: 
  284: VARIABLE Already
  285: 
  286: : ghost   ( "name" -- ghost )
  287:   Already off
  288:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  289:   drop  >in !  Make-Ghost ;
  290: 
  291: \ resolve                                              14oct92py
  292: 
  293: : resolve-loop ( ghost tcfa -- ghost tcfa )
  294:   >r dup >link @
  295:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  296: 
  297: \ exists                                                9may93jaw
  298: 
  299: : exists ( ghost tcfa -- )
  300:   over GhostNames
  301:   BEGIN @ dup
  302:   WHILE 2dup cell+ @ =
  303:   UNTIL
  304:         2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
  305:         swap cell+ !
  306:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  307:   THEN ;
  308: 
  309: : resolve  ( ghost tcfa -- )
  310:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  311:   resolve-loop  over >link ! <res> swap >magic ! ;
  312: 
  313: \ gexecute ghost,                                      01nov92py
  314: 
  315: : do-forward   ( ghost -- )
  316:   >link dup @  there rot !  T  A,  H ;
  317: : do-resolve   ( ghost -- )
  318:   >link @                   T  A,  H ;
  319: 
  320: : gexecute   ( ghost -- )   dup @
  321:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  322: : ghost,     ghost  gexecute ;
  323: 
  324: \ .unresolved                                          11may93jaw
  325: 
  326: variable ResolveFlag
  327: 
  328: \ ?touched                                             11may93jaw
  329: 
  330: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  331:                                0 <> and ;
  332: 
  333: : ?resolved  ( ghostname -- )
  334:   dup cell+ @ ?touched
  335:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  336: 
  337: >MINIMAL
  338: : .unresolved  ( -- )
  339:   ResolveFlag off cr ." Unresolved: "
  340:   Ghostnames
  341:   BEGIN @ dup
  342:   WHILE dup ?resolved
  343:   REPEAT drop ResolveFlag @
  344:   IF
  345:       abort" Unresolved words!"
  346:   ELSE
  347:       ." Nothing!"
  348:   THEN
  349:   cr ;
  350: 
  351: >CROSS
  352: \ Header states                                        12dec92py
  353: 
  354: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  355: 
  356: VARIABLE ^imm
  357: 
  358: >TARGET
  359: : immediate     40 flag!
  360:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  361:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  362:                 <imm> ^imm @ ! ;
  363: : restrict      20 flag! ;
  364: >CROSS
  365: 
  366: \ ALIAS2 ansforth conform alias                          9may93jaw
  367: 
  368: : ALIAS2 create here 0 , DOES> @ execute ;
  369: \ usage:
  370: \ ' <name> alias2 bla !
  371: 
  372: \ Target Header Creation                               01nov92py
  373: 
  374: : string,  ( addr count -- )
  375:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  376: : name,  ( "name" -- )  bl word count string, T cfalign H ;
  377: : view,   ( -- ) ( dummy ) ;
  378: 
  379: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  380: 
  381: s" crossdoc.fd" r/w create-file throw value doc-file-id
  382: \ contains the file-id of the documentation file
  383: 
  384: : \G ( -- )
  385:     source >in @ /string doc-file-id write-line throw
  386:     source >in ! drop ; immediate
  387: 
  388: Variable to-doc  to-doc on
  389: 
  390: : cross-doc-entry  ( -- )
  391:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
  392:     IF
  393: 	s" " doc-file-id write-line throw
  394: 	s" make-doc " doc-file-id write-file throw
  395: 	tlast @ >image count $1F and doc-file-id write-file throw
  396: 	>in @
  397: 	[char] ( parse 2drop
  398: 	[char] ) parse doc-file-id write-file throw
  399: 	s"  )" doc-file-id write-file throw
  400: 	[char] \ parse 2drop					
  401: 	POSTPONE \g
  402: 	>in !
  403:     THEN ;
  404: 
  405: \ Target TAGS creation
  406: 
  407: s" kernel.TAGS" r/w create-file throw value tag-file-id
  408: \ contains the file-id of the tags file
  409: 
  410: Create tag-beg 2 c,  7F c, bl c,
  411: Create tag-end 2 c,  bl c, 01 c,
  412: Create tag-bof 1 c,  0C c,
  413: 
  414: 2variable last-loadfilename 0 0 last-loadfilename 2!
  415: 	    
  416: : put-load-file-name ( -- )
  417:     loadfilename 2@ last-loadfilename 2@ d<>
  418:     IF
  419: 	tag-bof count tag-file-id write-line throw
  420: 	sourcefilename 2dup
  421: 	tag-file-id write-file throw
  422: 	last-loadfilename 2!
  423: 	s" ,0" tag-file-id write-line throw
  424:     THEN ;
  425: 
  426: : cross-tag-entry  ( -- )
  427:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
  428:     IF
  429: 	put-load-file-name
  430: 	source >in @ min tag-file-id write-file throw
  431: 	tag-beg count tag-file-id write-file throw
  432: 	tlast @ >image count $1F and tag-file-id write-file throw
  433: 	tag-end count tag-file-id write-file throw
  434: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
  435: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
  436: 	s" ,0" tag-file-id write-line throw
  437: 	base !
  438:     THEN ;
  439: 
  440: \ Target header creation
  441: 
  442: VARIABLE CreateFlag CreateFlag off
  443: 
  444: : (Theader ( "name" -- ghost ) T align H view,
  445:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  446:   >in @ name, >in ! T here H tlastcfa !
  447:   CreateFlag @ IF
  448:        >in @ alias2 swap >in !         \ create alias in target
  449:        >in @ ghost swap >in !
  450:        swap also ghosts ' previous swap !     \ tick ghost and store in alias
  451:        CreateFlag off
  452:   ELSE ghost THEN
  453:   dup >magic ^imm !     \ a pointer for immediate
  454:   Already @ IF  dup >end tdoes !
  455:   ELSE 0 tdoes ! THEN
  456:   80 flag!
  457:   cross-doc-entry cross-tag-entry ;
  458: 
  459: VARIABLE ;Resolve 1 cells allot
  460: 
  461: : Theader  ( "name" -- ghost )
  462:   (THeader dup there resolve 0 ;Resolve ! ;
  463: 
  464: >TARGET
  465: : Alias    ( cfa -- ) \ name
  466:   (THeader over resolve T A, H 80 flag! ;
  467: >CROSS
  468: 
  469: \ Conditionals and Comments                            11may93jaw
  470: 
  471: : ;Cond
  472:   postpone ;
  473:   swap ! ;  immediate
  474: 
  475: : Cond: ( -- ) \ name {code } ;
  476:   atonce on
  477:   ghost
  478:   >exec
  479:   :NONAME ;
  480: 
  481: : restrict? ( -- )
  482: \ aborts on interprete state - ae
  483:   state @ 0= ABORT" CROSS: Restricted" ;
  484: 
  485: : Comment ( -- )
  486:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  487: 
  488: Comment (       Comment \
  489: 
  490: \ Predefined ghosts                                    12dec92py
  491: 
  492: ghost 0=                                        drop
  493: ghost branch    ghost ?branch                   2drop
  494: ghost (do)      ghost (?do)                     2drop
  495: ghost (for)                                     drop
  496: ghost (loop)    ghost (+loop)                   2drop
  497: ghost (next)                                    drop
  498: ghost unloop    ghost ;S                        2drop
  499: ghost lit       ghost (compile) ghost !         2drop drop
  500: ghost (does>)   ghost noop                      2drop
  501: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  502: ghost '
  503: 
  504: \ compile                                              10may93jaw
  505: 
  506: : compile  ( -- ) \ name
  507:   restrict?
  508:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
  509:   0> ( immediate? )
  510:   IF    >exec @ compile,
  511:   ELSE  postpone literal postpone gexecute  THEN ;
  512:                                         immediate
  513: 
  514: >TARGET
  515: : '  ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
  516:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  517: 
  518: Cond: [']  compile lit ghost gexecute ;Cond
  519: 
  520: Cond: chars ;Cond
  521: 
  522: >CROSS
  523: \ tLiteral                                             12dec92py
  524: 
  525: : lit, ( n -- )   compile lit T  ,  H ;
  526: : alit, ( n -- )  compile lit T A,  H ;
  527: 
  528: >TARGET
  529: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  530: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  531: 
  532: : Char ( "<char>" -- )  bl word char+ c@ ;
  533: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  534: 
  535: >CROSS
  536: \ Target compiling loop                                12dec92py
  537: \ ">tib trick thrown out                               10may93jaw
  538: \ number? defined at the top                           11may93jaw
  539: 
  540: \ compiled word might leave items on stack!
  541: : tcom ( in name -- )
  542:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  543:                         ELSE  nip gexecute  THEN EXIT THEN
  544:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  545:                ELSE  2drop >in !
  546:                ghost gexecute THEN  ;
  547: 
  548: >TARGET
  549: \ : ; DOES>                                            13dec92py
  550: \ ]                                                     9may93py/jaw
  551: 
  552: : ] state on
  553:     BEGIN
  554:         BEGIN >in @ bl word
  555:               dup c@ 0= WHILE 2drop refill 0=
  556:               ABORT" CROSS: End of file while target compiling"
  557:         REPEAT
  558:         tcom
  559:         state @
  560:         0=
  561:     UNTIL ;
  562: 
  563: \ by the way: defining a second interpreter (a compiler-)loop
  564: \             is not allowed if a system should be ans conform
  565: 
  566: : : ( -- colon-sys ) \ Name
  567:   (THeader ;Resolve ! there ;Resolve cell+ !
  568:   docol, depth T ] H ;
  569: 
  570: : :noname ( -- colon-sys )
  571:   T align H there docol, depth T ] H ;
  572: 
  573: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  574: 
  575: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  576: 
  577: Cond: ; ( -- ) restrict?
  578:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  579:                           ELSE true ABORT" CROSS: Stack empty" THEN
  580:                compile ;S state off
  581:                ;Resolve @
  582:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  583:                ;Cond
  584: Cond: [  restrict? state off ;Cond
  585: 
  586: >CROSS
  587: : !does  :dodoes tlastcfa @ tuck T ! cell+ ! H ;
  588: 
  589: >TARGET
  590: Cond: DOES> restrict?
  591:         compile (does>) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  592:         ;Cond
  593: : DOES> dodoes, T here H !does depth T ] H ;
  594: 
  595: >CROSS
  596: \ Creation                                             01nov92py
  597: 
  598: \ Builder                                               11may93jaw
  599: 
  600: : Builder    ( Create do: "name" -- )
  601:   >in @ alias2 swap dup >in ! >r >r
  602:   Make-Ghost rot swap >exec ! ,
  603:   r> r> >in !
  604:   also ghosts ' previous swap ! ;
  605: \  DOES>  dup >exec @ execute ;
  606: 
  607: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  608:   IF dup >link @ dup 0< IF T A, 0 , H drop EXIT THEN drop THEN
  609:   :dodoes T A, H gexecute T here H cell - reloff ;
  610: 
  611: : TCreate ( -- )
  612:   last-ghost @
  613:   CreateFlag on
  614:   Theader >r dup gdoes,
  615:   >end @ >exec @ r> >exec ! ;
  616: 
  617: : Build:  ( -- [xt] [colon-sys] )
  618:   :noname  postpone TCreate ;
  619: 
  620: : gdoes>  ( ghost -- addr flag )
  621:   last-ghost @
  622:   state @ IF  gexecute true EXIT  THEN
  623:   cell+ @ T >body H false ;
  624: 
  625: \ DO: ;DO                                               11may93jaw
  626: \ changed to ?EXIT                                      10may93jaw
  627: 
  628: : DO:     ( -- addr [xt] [colon-sys] )
  629:   here ghostheader
  630:   :noname postpone gdoes> postpone ?EXIT ;
  631: 
  632: : ;DO ( addr [xt] [colon-sys] -- )
  633:   postpone ;    ( S addr xt )
  634:   over >exec ! ; immediate
  635: 
  636: : by      ( -- addr ) \ Name
  637:   ghost >end @ ;
  638: 
  639: >TARGET
  640: \ Variables and Constants                              05dec92py
  641: 
  642: Build:  ;
  643: DO: ( ghost -- addr ) ;DO
  644: Builder Create
  645: by Create :dovar resolve
  646: 
  647: Build: T 0 , H ;
  648: by Create
  649: Builder Variable
  650: 
  651: Build: T 0 A, H ;
  652: by Create
  653: Builder AVariable
  654: 
  655: \ User variables                                       04may94py
  656: 
  657: >CROSS
  658: Variable tup  0 tup !
  659: Variable tudp 0 tudp !
  660: : u,  ( n -- udp )
  661:   tup @ tudp @ + T  ! H
  662:   tudp @ dup T cell+ H tudp ! ;
  663: : au, ( n -- udp )
  664:   tup @ tudp @ + T A! H
  665:   tudp @ dup T cell+ H tudp ! ;
  666: >TARGET
  667: 
  668: Build: T 0 u, , H ;
  669: DO: ( ghost -- up-addr )  T @ H tup @ + ;DO
  670: Builder User
  671: by User :douser resolve
  672: 
  673: Build: T 0 u, , 0 u, drop H ;
  674: by User
  675: Builder 2User
  676: 
  677: Build: T 0 au, , H ;
  678: by User
  679: Builder AUser
  680: 
  681: Build:  ( n -- ) T , H ;
  682: DO: ( ghost -- n ) T @ H ;DO
  683: Builder Constant
  684: by Constant :docon resolve
  685: 
  686: Build:  ( n -- ) T A, H ;
  687: by Constant
  688: Builder AConstant
  689: 
  690: Build:  ( d -- ) T , , H ;
  691: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
  692: Builder 2Constant
  693: 
  694: Build: T 0 , H ;
  695: by Constant
  696: Builder Value
  697: 
  698: Build: T 0 A, H ;
  699: by Constant
  700: Builder AValue
  701: 
  702: Build:  ( -- ) compile noop ;
  703: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  704: Builder Defer
  705: by Defer :dodefer resolve
  706: 
  707: Build:  ( inter comp -- ) swap T immediate A, A, H ;
  708: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  709: Builder interpret/compile:
  710: 
  711: \ Sturctures                                           23feb95py
  712: 
  713: >CROSS
  714: : nalign ( addr1 n -- addr2 )
  715: \ addr2 is the aligned version of addr1 wrt the alignment size n
  716:  1- tuck +  swap invert and ;
  717: >TARGET
  718: 
  719: Build: 	>r rot r@ nalign  dup T , H  ( align1 size offset )
  720: 	+ swap r> nalign ;
  721: DO: T @ H + ;DO
  722: Builder Field
  723: by Field :dofield resolve
  724: 
  725: : struct  T 0 1 chars H ;
  726: : end-struct  T 2Constant H ;
  727: 
  728: : cells: ( n -- size align )
  729:     T cells 1 cells H ;
  730: 
  731: \ ' 2Constant Alias2 end-struct
  732: \ 0 1 T Chars H 2Constant struct
  733: 
  734: \ structural conditionals                              17dec92py
  735: 
  736: >CROSS
  737: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  738: : sys?        ( sys -- sys )    dup 0= ?struc ;
  739: : >mark       ( -- sys )        T here  0 , H ;
  740: : >resolve    ( sys -- )        T here over - swap ! H ;
  741: : <resolve    ( sys -- )        T here - , H ;
  742: >TARGET
  743: 
  744: \ Structural Conditionals                              12dec92py
  745: 
  746: Cond: BUT       restrict? sys? swap ;Cond
  747: Cond: YET       restrict? sys? dup ;Cond
  748: 
  749: >CROSS
  750: Variable tleavings
  751: >TARGET
  752: 
  753: Cond: DONE   ( addr -- )  restrict? tleavings @
  754:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  755:       tleavings ! drop ;Cond
  756: 
  757: >CROSS
  758: : (leave  T here H tleavings @ T , H  tleavings ! ;
  759: >TARGET
  760: 
  761: Cond: LEAVE     restrict? compile branch (leave ;Cond
  762: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  763: 
  764: \ Structural Conditionals                              12dec92py
  765: 
  766: Cond: AHEAD     restrict? compile branch >mark ;Cond
  767: Cond: IF        restrict? compile ?branch >mark ;Cond
  768: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  769: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  770: 
  771: Cond: BEGIN     restrict? T here H ;Cond
  772: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  773: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  774: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  775: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  776: 
  777: \ Structural Conditionals                              12dec92py
  778: 
  779: Cond: DO        restrict? compile (do)   T here H ;Cond
  780: Cond: ?DO       restrict? compile (?do)  (leave T here H ;Cond
  781: Cond: FOR       restrict? compile (for)  T here H ;Cond
  782: 
  783: >CROSS
  784: : loop]   dup <resolve cell - compile DONE compile unloop ;
  785: >TARGET
  786: 
  787: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  788: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  789: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  790: 
  791: \ String words                                         23feb93py
  792: 
  793: : ,"            [char] " parse string, T align H ;
  794: 
  795: Cond: ."        restrict? compile (.")     T ," H ;Cond
  796: Cond: S"        restrict? compile (S")     T ," H ;Cond
  797: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  798: 
  799: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  800: : IS            T ' >body ! H ;
  801: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  802: : TO            T ' >body ! H ;
  803: 
  804: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  805: 
  806: \ linked list primitive
  807: : linked        T here over @ A, swap ! H ;
  808: 
  809: : err"   s" ErrLink linked" evaluate T , H
  810:          [char] " parse string, T align H ;
  811: 
  812: : env"  [char] " parse s" EnvLink linked" evaluate
  813:         string, T align , H ;
  814: 
  815: : 2env" [char] " parse s" EnvLink linked" evaluate
  816:         here >r string, T align , , H
  817:         r> dup T c@ H 80 and swap T c! H ;
  818: 
  819: \ compile must be last                                 22feb93py
  820: 
  821: Cond: compile ( -- ) restrict? \ name
  822:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  823:       0> IF    gexecute
  824:          ELSE  dup >magic @ <imm> =
  825:                IF   gexecute
  826:                ELSE compile (compile) gexecute THEN THEN ;Cond
  827: 
  828: Cond: postpone ( -- ) restrict? \ name
  829:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  830:       0> IF    gexecute
  831:          ELSE  dup >magic @ <imm> =
  832:                IF   gexecute
  833:                ELSE compile (compile) gexecute THEN THEN ;Cond
  834: 
  835: >MINIMAL
  836: also minimal
  837: \ Usefull words                                        13feb93py
  838: 
  839: : KB  400 * ;
  840: 
  841: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  842: 
  843: : there? bl word gfind IF >magic @ <fwd> <> ELSE drop false THEN ;
  844: 
  845: : [IFDEF] there? postpone [IF] ;
  846: : [IFUNDEF] there? 0= postpone [IF] ;
  847: 
  848: \ C: \- \+ Conditional Compiling                         09jun93jaw
  849: 
  850: : C: >in @ there? 0=
  851:      IF    >in ! T : H
  852:      ELSE drop
  853:         BEGIN bl word dup c@
  854:               IF   count comment? s" ;" compare 0= ?EXIT
  855:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  856:               THEN
  857:         AGAIN
  858:      THEN ;
  859: 
  860: also minimal
  861: 
  862: : \- there? IF postpone \ THEN ;
  863: : \+ there? 0= IF postpone \ THEN ;
  864: 
  865: : [IF]   postpone [IF] ;
  866: : [THEN] postpone [THEN] ;
  867: : [ELSE] postpone [ELSE] ;
  868: 
  869: Cond: [IF]      [IF] ;Cond
  870: Cond: [IFDEF]   [IFDEF] ;Cond
  871: Cond: [IFUNDEF] [IFUNDEF] ;Cond
  872: Cond: [THEN]    [THEN] ;Cond
  873: Cond: [ELSE]    [ELSE] ;Cond
  874: 
  875: \ save-cross                                           17mar93py
  876: 
  877: \ i'm not interested in bigforth features this time    10may93jaw
  878: \ [IFDEF] file
  879: \ also file
  880: \ [THEN]
  881: \ included throw after create-file                     11may93jaw
  882: 
  883: bigendian Constant bigendian
  884: 
  885: Create magic  s" Gforth10" here over allot swap move
  886: 
  887: char 1 bigendian + cell + magic 7 + c!
  888: 
  889: : save-cross ( "image-name" "binary-name" -- )
  890:   bl parse ." Saving to " 2dup type cr
  891:   w/o bin create-file throw >r
  892:   s" #! "  r@ write-file throw
  893:   bl parse r@ write-file throw
  894:   s"  -i"  r@ write-file throw
  895:   #lf      r@ emit-file throw
  896:   r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
  897:   ?do
  898:       bl over emit-file throw
  899:   loop
  900:   drop
  901:   magic 8       r@ write-file throw \ write magic
  902:   image @ there r@ write-file throw \ write image
  903:   bit$  @ there 1- cell>bit rshift 1+
  904:                 r@ write-file throw \ write tags
  905:   r> close-file throw ;
  906: 
  907: \ words that should be in minimal
  908: 
  909: : + + ;         : 1- 1- ;
  910: : - - ;         : 2* 2* ;
  911: : * * ;         : / / ;
  912: : dup dup ;     : over over ;
  913: : swap swap ;   : rot rot ;
  914: : drop drop ;   : =   = ;
  915: : lshift lshift ; : 2/ 2/ ;
  916: : . . ;
  917: cell constant cell
  918: 
  919: \ include bug5.fs
  920: \ only forth also minimal definitions
  921: 
  922: : \  postpone \ ;
  923: : \G postpone \G ;
  924: : (  postpone ( ;
  925: : include bl word count included ;
  926: : .( [char] ) parse type ;
  927: : cr cr ;
  928: 
  929: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
  930: only forth also minimal definitions
  931: 
  932: \ cross-compiler words
  933: 
  934: : decimal       decimal ;
  935: : hex           hex ;
  936: 
  937: : tudp          T tudp H ;
  938: : tup           T tup H ;
  939: 
  940: : doc-off       false T to-doc H ! ;
  941: : doc-on        true  T to-doc H ! ;
  942: 
  943: minimal
  944: 
  945: \ for debugging...
  946: : order         order ;
  947: : words         words ;
  948: : .s            .s ;
  949: 
  950: : bye           bye ;
  951: 
  952: \ turnkey direction
  953: : H forth ; immediate
  954: : T minimal ; immediate
  955: : G ghosts ; immediate
  956: 
  957: : turnkey  0 set-order also Target definitions
  958:            also Minimal also ;
  959: 
  960: \ these ones are pefered:
  961: 
  962: : lock   turnkey ;
  963: : unlock forth also cross ;
  964: 
  965: unlock definitions also minimal
  966: : lock   lock ;
  967: lock

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