File:  [gforth] / gforth / cross.fs
Revision 1.50: download - view: text, annotated - select for diffs
Sun Jul 6 15:42:22 1997 UTC (22 years, 4 months ago) by jwilke
Branches: MAIN
CVS tags: HEAD
added const, to be able to compile new sources.
jens

    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: \ 	needed? works better now!!!		01mar97jaw
   41: \	mach file is only loaded into target
   42: \	cell corrected
   43: 
   44: 
   45: \ include other.fs       \ ansforth extentions for cross
   46: 
   47: : string, ( c-addr u -- )
   48:     \ puts down string as cstring
   49:     dup c, here swap chars dup allot move ;
   50: ' falign Alias cfalign
   51: : comment? ( c-addr u -- c-addr u )
   52:         2dup s" (" compare 0=
   53:         IF    postpone (
   54:         ELSE  2dup s" \" compare 0= IF postpone \ THEN
   55:         THEN ;
   56: 
   57: decimal
   58: 
   59: \ Begin CROSS COMPILER:
   60: 
   61: \ GhostNames                                            9may93jaw
   62: \ second name source to search trough list
   63: 
   64: VARIABLE GhostNames
   65: 0 GhostNames !
   66: : GhostName ( -- addr )
   67:     here GhostNames @ , GhostNames ! here 0 ,
   68:     bl word count
   69:     \ 2dup type space
   70:     string, cfalign ;
   71: 
   72: hex
   73: 
   74: 
   75: Vocabulary Cross
   76: Vocabulary Target
   77: Vocabulary Ghosts
   78: VOCABULARY Minimal
   79: only Forth also Target also also
   80: definitions Forth
   81: 
   82: : T  previous Cross also Target ; immediate
   83: : G  Ghosts ; immediate
   84: : H  previous Forth also Cross ; immediate
   85: 
   86: forth definitions
   87: 
   88: : T  previous Cross also Target ; immediate
   89: : G  Ghosts ; immediate
   90: 
   91: : >cross  also Cross definitions previous ;
   92: : >target also Target definitions previous ;
   93: : >minimal also Minimal definitions previous ;
   94: 
   95: H
   96: 
   97: >CROSS
   98: 
   99: \ Parameter for target systems                         06oct92py
  100: 
  101: >TARGET
  102: mach-file count included
  103: 
  104: [IFUNDEF] has-interpreter true CONSTANT has-interpreter [THEN]
  105: 
  106: also Forth definitions
  107: 
  108: [IFDEF] asm-include asm-include [THEN]
  109: 
  110: previous
  111: hex
  112: 
  113: >CROSS
  114: 
  115: \ Create additional parameters                         19jan95py
  116: 
  117: T
  118: NIL		   Constant TNIL
  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: \ Variables                                            06oct92py
  128: 
  129: Variable image
  130: Variable tlast    TNIL tlast !  \ Last name field
  131: Variable tlastcfa \ Last code field
  132: Variable tdoes    \ Resolve does> calls
  133: Variable bit$
  134: Variable tdp
  135: : there  tdp @ ;
  136: 
  137: 
  138: >TARGET
  139: 
  140: \ Byte ordering and cell size                          06oct92py
  141: 
  142: : cell+         tcell + ;
  143: : cells         tcell<< lshift ;
  144: : chars         ;
  145: : char+		1 + ;
  146: : floats	tfloat * ;
  147:     
  148: >CROSS
  149: : cell/         tcell<< rshift ;
  150: >TARGET
  151: 20 CONSTANT bl
  152: TNIL Constant NIL
  153: 
  154: >CROSS
  155: 
  156: bigendian
  157: [IF]
  158:    : T!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
  159:      DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
  160:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds
  161:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
  162: [ELSE]
  163:    : T!  ( n addr -- )  >r s>d r> tcell bounds
  164:      DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
  165:    : T@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
  166:      DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
  167: [THEN]
  168: 
  169: \ Memory initialisation                                05dec92py
  170: \ Fixed bug in else part                               11may93jaw
  171: 
  172: [IFDEF] Memory \ Memory is a bigFORTH feature
  173:    also Memory
  174:    : initmem ( var len -- )
  175:      2dup swap handle! >r @ r> erase ;
  176:    toss
  177: [ELSE]
  178:    : initmem ( var len -- )
  179:      tuck allocate abort" CROSS: No memory for target"
  180:      ( len var adr ) dup rot !
  181:      ( len adr ) swap erase ;
  182: [THEN]
  183: 
  184: \ MakeKernal                                           12dec92py
  185: 
  186: >MINIMAL
  187: : makekernel ( targetsize -- targetsize )
  188:   bit$  over 1- tcell>bit rshift 1+ initmem
  189:   image over initmem tdp off ;
  190: 
  191: >CROSS
  192: \ Bit string manipulation                               06oct92py
  193: \                                                       9may93jaw
  194: CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
  195: : bits ( n -- n ) chars Bittable + c@ ;
  196: 
  197: : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
  198: : +bit ( addr n -- )  >bit over c@ or swap c! ;
  199: : -bit ( addr n -- )  >bit invert over c@ and swap c! ;
  200: : relon ( taddr -- )  bit$ @ swap cell/ +bit ;
  201: : reloff ( taddr -- )  bit$ @ swap cell/ -bit ;
  202: 
  203: \ Target memory access                                 06oct92py
  204: 
  205: : align+  ( taddr -- rest )
  206:     tcell tuck 1- and - [ tcell 1- ] Literal and ;
  207: : cfalign+  ( taddr -- rest )
  208:     \ see kernel.fs:cfaligned
  209:     /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;
  210: 
  211: >TARGET
  212: : aligned ( taddr -- ta-addr )  dup align+ + ;
  213: \ assumes cell alignment granularity (as GNU C)
  214: 
  215: : cfaligned ( taddr1 -- taddr2 )
  216:     \ see kernel.fs
  217:     dup cfalign+ + ;
  218: 
  219: >CROSS
  220: : >image ( taddr -- absaddr )  image @ + ;
  221: >TARGET
  222: : @  ( taddr -- w )     >image t@ ;
  223: : !  ( w taddr -- )     >image t! ;
  224: : c@ ( taddr -- char )  >image c@ ;
  225: : c! ( char taddr -- )  >image c! ;
  226: : 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
  227: : 2! ( x1 x2 taddr -- ) T swap over ! cell+ ! H ;
  228: 
  229: \ Target compilation primitives                        06oct92py
  230: \ included A!                                          16may93jaw
  231: 
  232: : here  ( -- there )    there ;
  233: : allot ( n -- )        tdp +! ;
  234: : ,     ( w -- )        T here H tcell T allot  ! H ;
  235: : c,    ( char -- )     T here    1 allot c! H ;
  236: : align ( -- )          T here H align+ 0 ?DO  bl T c, H LOOP ;
  237: : cfalign ( -- )
  238:     T here H cfalign+ 0 ?DO  bl T c, H LOOP ;
  239: 
  240: : A!                    dup relon T ! H ;
  241: : A,    ( w -- )        T here H relon T , H ;
  242: 
  243: >CROSS
  244: 
  245: \ threading modell                                     13dec92py
  246: 
  247: >TARGET
  248: : >body   ( cfa -- pfa ) T cell+ cell+ H ;
  249: >CROSS
  250: 
  251: \ Ghost Builder                                        06oct92py
  252: 
  253: \ <T T> new version with temp variable                 10may93jaw
  254: 
  255: VARIABLE VocTemp
  256: 
  257: : <T  get-current VocTemp ! also Ghosts definitions ;
  258: : T>  previous VocTemp @ set-current ;
  259: 
  260: hex
  261: 4711 Constant <fwd>             4712 Constant <res>
  262: 4713 Constant <imm>             4714 Constant <do:>
  263: 
  264: \ iForth makes only immediate directly after create
  265: \ make atonce trick! ?
  266: 
  267: Variable atonce atonce off
  268: 
  269: : NoExec true ABORT" CROSS: Don't execute ghost" ;
  270: 
  271: : GhostHeader <fwd> , 0 , ['] NoExec , ;
  272: 
  273: : >magic ;
  274: : >link cell+ ;
  275: : >exec cell+ cell+ ;
  276: : >end 3 cells + ;
  277: 
  278: Variable last-ghost
  279: : Make-Ghost ( "name" -- ghost )
  280:   >in @ GhostName swap >in !
  281:   <T Create atonce @ IF immediate atonce off THEN
  282:   here tuck swap ! ghostheader T>
  283:   DOES> dup last-ghost ! >exec @ execute ;
  284: 
  285: variable cfalist 0 cfalist !
  286: 
  287: : markcfa
  288:   cfalist here over @ , swap ! , ;
  289: 
  290: \ ghost words                                          14oct92py
  291: \                                          changed:    10may93py/jaw
  292: 
  293: : gfind   ( string -- ghost true/1 / string false )
  294: \ searches for string in word-list ghosts
  295:   dup count [ ' ghosts >body ] ALiteral search-wordlist
  296:   dup IF >r >body nip r>  THEN ;
  297: 
  298: VARIABLE Already
  299: 
  300: : ghost   ( "name" -- ghost )
  301:   Already off
  302:   >in @  bl word gfind   IF  Already on nip EXIT  THEN
  303:   drop  >in !  Make-Ghost ;
  304: 
  305: \ resolve                                              14oct92py
  306: 
  307: : resolve-loop ( ghost tcfa -- ghost tcfa )
  308:   >r dup >link @
  309:   BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;
  310: 
  311: \ exists                                                9may93jaw
  312: 
  313: : exists ( ghost tcfa -- )
  314:   over GhostNames
  315:   BEGIN @ dup
  316:   WHILE 2dup cell+ @ =
  317:   UNTIL
  318:         2 cells + count cr ." CROSS: Exists: " type 4 spaces drop
  319:         swap cell+ !
  320:   ELSE  true abort" CROSS: Ghostnames inconsistent "
  321:   THEN ;
  322: 
  323: : resolve  ( ghost tcfa -- )
  324:   over >magic @ <fwd> <>  IF  exists EXIT THEN
  325:   resolve-loop  over >link ! <res> swap >magic ! ;
  326: 
  327: \ gexecute ghost,                                      01nov92py
  328: 
  329: : do-forward   ( ghost -- )
  330:   >link dup @  there rot !  T  A,  H ;
  331: : do-resolve   ( ghost -- )
  332:   >link @                   T  A,  H ;
  333: 
  334: : gexecute   ( ghost -- )   dup @
  335:              <fwd> = IF  do-forward  ELSE  do-resolve  THEN ;
  336: : ghost,     ghost  gexecute ;
  337: 
  338: \ .unresolved                                          11may93jaw
  339: 
  340: variable ResolveFlag
  341: 
  342: \ ?touched                                             11may93jaw
  343: 
  344: : ?touched ( ghost -- flag ) dup >magic @ <fwd> = swap >link @
  345:                                0 <> and ;
  346: 
  347: : ?resolved  ( ghostname -- )
  348:   dup cell+ @ ?touched
  349:   IF  cell+ cell+ count cr type ResolveFlag on ELSE drop THEN ;
  350: 
  351: >MINIMAL
  352: : .unresolved  ( -- )
  353:   ResolveFlag off cr ." Unresolved: "
  354:   Ghostnames
  355:   BEGIN @ dup
  356:   WHILE dup ?resolved
  357:   REPEAT drop ResolveFlag @
  358:   IF
  359:       -1 abort" Unresolved words!"
  360:   ELSE
  361:       ." Nothing!"
  362:   THEN
  363:   cr ;
  364: 
  365: >CROSS
  366: \ Header states                                        12dec92py
  367: 
  368: : flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;
  369: 
  370: VARIABLE ^imm
  371: 
  372: >TARGET
  373: : immediate     40 flag!
  374:                 ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
  375:                 <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
  376:                 <imm> ^imm @ ! ;
  377: : restrict      20 flag! ;
  378: >CROSS
  379: 
  380: \ ALIAS2 ansforth conform alias                          9may93jaw
  381: 
  382: : ALIAS2 create here 0 , DOES> @ execute ;
  383: \ usage:
  384: \ ' <name> alias2 bla !
  385: 
  386: \ Target Header Creation                               01nov92py
  387: 
  388: : string,  ( addr count -- )
  389:   dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
  390: : name,  ( "name" -- )  bl word count string, T cfalign H ;
  391: : view,   ( -- ) ( dummy ) ;
  392: 
  393: \ Target Document Creation (goes to crossdoc.fd)       05jul95py
  394: 
  395: s" doc/crossdoc.fd" r/w create-file throw value doc-file-id
  396: \ contains the file-id of the documentation file
  397: 
  398: : T-\G ( -- )
  399:     source >in @ /string doc-file-id write-line throw
  400:     postpone \ ;
  401: 
  402: Variable to-doc  to-doc on
  403: 
  404: : cross-doc-entry  ( -- )
  405:     to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
  406:     IF
  407: 	s" " doc-file-id write-line throw
  408: 	s" make-doc " doc-file-id write-file throw
  409: 	tlast @ >image count $1F and doc-file-id write-file throw
  410: 	>in @
  411: 	[char] ( parse 2drop
  412: 	[char] ) parse doc-file-id write-file throw
  413: 	s"  )" doc-file-id write-file throw
  414: 	[char] \ parse 2drop					
  415: 	T-\G
  416: 	>in !
  417:     THEN ;
  418: 
  419: \ Target TAGS creation
  420: 
  421: s" kernel.TAGS" r/w create-file throw value tag-file-id
  422: \ contains the file-id of the tags file
  423: 
  424: Create tag-beg 2 c,  7F c, bl c,
  425: Create tag-end 2 c,  bl c, 01 c,
  426: Create tag-bof 1 c,  0C c,
  427: 
  428: 2variable last-loadfilename 0 0 last-loadfilename 2!
  429: 	    
  430: : put-load-file-name ( -- )
  431:     loadfilename 2@ last-loadfilename 2@ d<>
  432:     IF
  433: 	tag-bof count tag-file-id write-line throw
  434: 	sourcefilename 2dup
  435: 	tag-file-id write-file throw
  436: 	last-loadfilename 2!
  437: 	s" ,0" tag-file-id write-line throw
  438:     THEN ;
  439: 
  440: : cross-tag-entry  ( -- )
  441:     tlast @ 0<>	\ not an anonymous (i.e. noname) header
  442:     IF
  443: 	put-load-file-name
  444: 	source >in @ min tag-file-id write-file throw
  445: 	tag-beg count tag-file-id write-file throw
  446: 	tlast @ >image count $1F and tag-file-id write-file throw
  447: 	tag-end count tag-file-id write-file throw
  448: 	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
  449: \	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
  450: 	s" ,0" tag-file-id write-line throw
  451: 	base !
  452:     THEN ;
  453: 
  454: \ Check for words
  455: 
  456: Defer skip? ' false IS skip?
  457: 
  458: : defined? ( -- flag ) \ name
  459:     ghost >magic @ <fwd> <> ;
  460: 
  461: : needed? ( -- flag ) \ name
  462: \G returns a false flag when
  463: \G a word is not defined
  464: \G a forward reference exists
  465: \G so the definition is not skipped!
  466:     bl word gfind
  467:     IF dup >magic @ <fwd> = 
  468: 	\ swap >link @ 0<> and 
  469: 	nip
  470: 	0=
  471:     ELSE  drop true  THEN ;
  472: 
  473: : doer? ( -- flag ) \ name
  474:     ghost >magic @ <do:> = ;
  475: 
  476: : skip-defs ( -- )
  477:     BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;
  478: 
  479: \ Target header creation
  480: 
  481: VARIABLE CreateFlag CreateFlag off
  482: 
  483: : (Theader ( "name" -- ghost )
  484: \  >in @ bl word count type 2 spaces >in !
  485:   T align H view,
  486:   tlast @ dup 0> IF  T 1 cells - THEN  A, H  there tlast !
  487:   >in @ name, >in ! T here H tlastcfa !
  488:   CreateFlag @ IF
  489:        >in @ alias2 swap >in !         \ create alias in target
  490:        >in @ ghost swap >in !
  491:        swap also ghosts ' previous swap !     \ tick ghost and store in alias
  492:        CreateFlag off
  493:   ELSE ghost THEN
  494:   dup >magic ^imm !     \ a pointer for immediate
  495:   Already @ IF  dup >end tdoes !
  496:   ELSE 0 tdoes ! THEN
  497:   80 flag!
  498:   cross-doc-entry cross-tag-entry ;
  499: 
  500: VARIABLE ;Resolve 1 cells allot
  501: 
  502: : Theader  ( "name" -- ghost )
  503:   (THeader dup there resolve 0 ;Resolve ! ;
  504: 
  505: >TARGET
  506: : Alias    ( cfa -- ) \ name
  507:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  508:     dup 0< has-prims 0= and
  509:     IF
  510: 	." needs prim: " >in @ bl word count type >in ! cr
  511:     THEN
  512:     (THeader over resolve T A, H 80 flag! ;
  513: : Alias:   ( cfa -- ) \ name
  514:     >in @ skip? IF  2drop  EXIT  THEN  >in !
  515:     dup 0< has-prims 0= and
  516:     IF
  517: 	." needs doer: " >in @ bl word count type >in ! cr
  518:     THEN
  519:     ghost tuck swap resolve <do:> swap >magic ! ;
  520: >CROSS
  521: 
  522: \ Conditionals and Comments                            11may93jaw
  523: 
  524: : ;Cond
  525:   postpone ;
  526:   swap ! ;  immediate
  527: 
  528: : Cond: ( -- ) \ name {code } ;
  529:   atonce on
  530:   ghost
  531:   >exec
  532:   :NONAME ;
  533: 
  534: : restrict? ( -- )
  535: \ aborts on interprete state - ae
  536:   state @ 0= ABORT" CROSS: Restricted" ;
  537: 
  538: : Comment ( -- )
  539:   >in @ atonce on ghost swap >in ! ' swap >exec ! ;
  540: 
  541: Comment (       Comment \
  542: 
  543: \ Predefined ghosts                                    12dec92py
  544: 
  545: ghost 0=                                        drop
  546: ghost branch    ghost ?branch                   2drop
  547: ghost (do)      ghost (?do)                     2drop
  548: ghost (for)                                     drop
  549: ghost (loop)    ghost (+loop)                   2drop
  550: ghost (next)                                    drop
  551: ghost unloop    ghost ;S                        2drop
  552: ghost lit       ghost (compile) ghost !         2drop drop
  553: ghost (does>)   ghost noop                      2drop
  554: ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
  555: ghost '                                         drop
  556: ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
  557: ghost over      ghost =         ghost drop      2drop drop
  558: 
  559: \ compile                                              10may93jaw
  560: 
  561: : compile  ( -- ) \ name
  562:   restrict?
  563:   bl word gfind dup 0= ABORT" CROSS: Can't compile "
  564:   0> ( immediate? )
  565:   IF    >exec @ compile,
  566:   ELSE  postpone literal postpone gexecute  THEN ;
  567:                                         immediate
  568: 
  569: \ generic threading modell
  570: : docol,  ( -- ) compile :docol T 0 , H ;
  571: 
  572: : dodoes, ( -- ) T cfalign H compile :doesjump T 0 , H ;
  573: 
  574: [IFUNDEF] (code) 
  575: Defer (code)
  576: Defer (end-code)
  577: [THEN]
  578: 
  579: [IFUNDEF] ca>native
  580: defer ca>native
  581: [THEN]
  582: 
  583: >TARGET
  584: : Code
  585:   (THeader there resolve
  586:   [ has-prims 0= [IF] ITC [ELSE] true [THEN] ] [IF]
  587:   there 2 T cells H + ca>native T a, 0 , H
  588:   [THEN]
  589:   depth (code) ;
  590: 
  591: : Code:
  592:     ghost dup there ca>native resolve  <do:> swap >magic !
  593:     depth (code) ;
  594: 
  595: : end-code
  596:     depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  597:     ELSE true ABORT" CROSS: Stack empty" THEN
  598:     (end-code) ;
  599:                
  600: : '  ( -- cfa ) bl word gfind 0= ABORT" CROSS: undefined "
  601:   dup >magic @ <fwd> = ABORT" CROSS: forward " >link @ ;
  602: 
  603: Cond: [']  compile lit ghost gexecute ;Cond
  604: 
  605: Cond: chars ;Cond
  606: 
  607: >CROSS
  608: \ tLiteral                                             12dec92py
  609: 
  610: : lit, ( n -- )   compile lit T  ,  H ;
  611: : alit, ( n -- )  compile lit T A,  H ;
  612: 
  613: >TARGET
  614: Cond: \G  T-\G ;Cond
  615: 
  616: Cond:  Literal ( n -- )   restrict? lit, ;Cond
  617: Cond: ALiteral ( n -- )   restrict? alit, ;Cond
  618: 
  619: : Char ( "<char>" -- )  bl word char+ c@ ;
  620: Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond
  621: 
  622: \ some special literals					27jan97jaw
  623: 
  624: Cond: MAXU
  625:  restrict? compile lit 
  626:  tcell 0 ?DO FF T c, H LOOP ;Cond
  627: 
  628: Cond: MINI
  629:  restrict? compile lit
  630:  bigendian IF
  631:  80 T c, H tcell 1 ?DO 0 T c, H LOOP 
  632:  ELSE
  633:  tcell 1 ?DO 0 T c, H LOOP 80 T c, H
  634:  THEN
  635:  ;Cond
  636:  
  637: Cond: MAXI
  638:  restrict? compile lit
  639:  bigendian IF
  640:  7F T c, H tcell 1 ?DO FF T c, H LOOP 
  641:  ELSE
  642:  tcell 1 ?DO FF T c, H LOOP 7F T c, H
  643:  THEN
  644:  ;Cond
  645: 
  646: >CROSS
  647: \ Target compiling loop                                12dec92py
  648: \ ">tib trick thrown out                               10may93jaw
  649: \ number? defined at the top                           11may93jaw
  650: 
  651: \ compiled word might leave items on stack!
  652: : tcom ( in name -- )
  653:   gfind  ?dup  IF    0> IF    nip >exec @ execute
  654:                         ELSE  nip gexecute  THEN EXIT THEN
  655:   number? dup  IF    0> IF swap lit,  THEN  lit,  drop
  656:                ELSE  2drop >in !
  657:                ghost gexecute THEN  ;
  658: 
  659: >TARGET
  660: \ : ; DOES>                                            13dec92py
  661: \ ]                                                     9may93py/jaw
  662: 
  663: : ] state on
  664:     BEGIN
  665:         BEGIN >in @ bl word
  666:               dup c@ 0= WHILE 2drop refill 0=
  667:               ABORT" CROSS: End of file while target compiling"
  668:         REPEAT
  669:         tcom
  670:         state @
  671:         0=
  672:     UNTIL ;
  673: 
  674: \ by the way: defining a second interpreter (a compiler-)loop
  675: \             is not allowed if a system should be ans conform
  676: 
  677: : : ( -- colon-sys ) \ Name
  678:   >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
  679:   (THeader ;Resolve ! there ;Resolve cell+ !
  680:   docol, depth T ] H ;
  681: 
  682: : :noname ( -- colon-sys )
  683:   T cfalign H there docol, depth T ] H ;
  684: 
  685: Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond
  686: 
  687: Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond
  688: 
  689: Cond: ; ( -- ) restrict?
  690:                depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
  691:                           ELSE true ABORT" CROSS: Stack empty" THEN
  692:                compile ;S state off
  693:                ;Resolve @
  694:                IF ;Resolve @ ;Resolve cell+ @ resolve THEN
  695:                ;Cond
  696: Cond: [  restrict? state off ;Cond
  697: 
  698: >CROSS
  699: : !does
  700:     tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
  701: 
  702: >TARGET
  703: Cond: DOES> restrict?
  704:         compile (does>) dodoes, tdoes @ ?dup IF  @ T here H resolve THEN
  705:         ;Cond
  706: : DOES> dodoes, T here H !does depth T ] H ;
  707: 
  708: >CROSS
  709: \ Creation                                             01nov92py
  710: 
  711: \ Builder                                               11may93jaw
  712: 
  713: : Builder    ( Create do: "name" -- )
  714:   >in @ alias2 swap dup >in ! >r >r
  715:   Make-Ghost rot swap >exec ! ,
  716:   r> r> >in !
  717:   also ghosts ' previous swap ! ;
  718: \  DOES>  dup >exec @ execute ;
  719: 
  720: : gdoes,  ( ghost -- )  >end @ dup >magic @ <fwd> <>
  721:     IF
  722: 	dup >magic @ <do:> =
  723: 	IF  gexecute T 0 , H  EXIT THEN
  724:     THEN
  725:     compile :dodoes gexecute T here H tcell - reloff ;
  726: 
  727: : TCreate ( -- )
  728:   last-ghost @
  729:   CreateFlag on
  730:   Theader >r dup gdoes,
  731:   >end @ >exec @ r> >exec ! ;
  732: 
  733: : Build:  ( -- [xt] [colon-sys] )
  734:   :noname  postpone TCreate ;
  735: 
  736: : gdoes>  ( ghost -- addr flag )
  737:   last-ghost @
  738:   state @ IF  gexecute true EXIT  THEN
  739:   cell+ @ T >body H false ;
  740: 
  741: \ DO: ;DO                                               11may93jaw
  742: \ changed to ?EXIT                                      10may93jaw
  743: 
  744: : DO:     ( -- addr [xt] [colon-sys] )
  745:   here ghostheader
  746:   :noname postpone gdoes> postpone ?EXIT ;
  747: 
  748: : by:     ( -- addr [xt] [colon-sys] ) \ name
  749:   ghost
  750:   :noname postpone gdoes> postpone ?EXIT ;
  751: 
  752: : ;DO ( addr [xt] [colon-sys] -- )
  753:   postpone ;    ( S addr xt )
  754:   over >exec ! ; immediate
  755: 
  756: : by      ( -- addr ) \ Name
  757:   ghost >end @ ;
  758: 
  759: >TARGET
  760: \ Variables and Constants                              05dec92py
  761: 
  762: Build:  ;
  763: by: :dovar ( ghost -- addr ) ;DO
  764: Builder Create
  765: 
  766: Build: T 0 , H ;
  767: by Create
  768: Builder Variable
  769: 
  770: Build: T 0 A, H ;
  771: by Create
  772: Builder AVariable
  773: 
  774: \ User variables                                       04may94py
  775: 
  776: >CROSS
  777: Variable tup  0 tup !
  778: Variable tudp 0 tudp !
  779: : u,  ( n -- udp )
  780:   tup @ tudp @ + T  ! H
  781:   tudp @ dup T cell+ H tudp ! ;
  782: : au, ( n -- udp )
  783:   tup @ tudp @ + T A! H
  784:   tudp @ dup T cell+ H tudp ! ;
  785: >TARGET
  786: 
  787: Build: T 0 u, , H ;
  788: by: :douser ( ghost -- up-addr )  T @ H tup @ + ;DO
  789: Builder User
  790: 
  791: Build: T 0 u, , 0 u, drop H ;
  792: by User
  793: Builder 2User
  794: 
  795: Build: T 0 au, , H ;
  796: by User
  797: Builder AUser
  798: 
  799: Build:  ( n -- ) ;
  800: by: :docon ( ghost -- n ) T @ H ;DO
  801: Builder (Constant)
  802: 
  803: Build:  ( n -- ) T , H ;
  804: by (Constant)
  805: Builder Constant
  806: 
  807: Build:  ( n -- ) T A, H ;
  808: by (Constant)
  809: Builder AConstant
  810: 
  811: Build:  ( d -- ) T , , H ;
  812: DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
  813: Builder 2Constant
  814: 
  815: Build: T , H ;
  816: by (Constant)
  817: Builder Value
  818: 
  819: Build: T A, H ;
  820: by (Constant)
  821: Builder AValue
  822: 
  823: Build:  ( -- ) compile noop ;
  824: by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  825: Builder Defer
  826: 
  827: Build:  ( inter comp -- ) swap T immediate A, A, H ;
  828: DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
  829: Builder interpret/compile:
  830: 
  831: \ Sturctures                                           23feb95py
  832: 
  833: >CROSS
  834: : nalign ( addr1 n -- addr2 )
  835: \ addr2 is the aligned version of addr1 wrt the alignment size n
  836:  1- tuck +  swap invert and ;
  837: >TARGET
  838: 
  839: Build: ;
  840: by: :dofield T @ H + ;DO
  841: Builder (Field)
  842: 
  843: Build: 	>r rot r@ nalign  dup T , H  ( align1 size offset )
  844: 	+ swap r> nalign ;
  845: by (Field)
  846: Builder Field
  847: 
  848: : struct  T 0 1 chars H ;
  849: : end-struct  T 2Constant H ;
  850: 
  851: : cells: ( n -- size align )
  852:     T cells 1 cells H ;
  853: 
  854: \ ' 2Constant Alias2 end-struct
  855: \ 0 1 T Chars H 2Constant struct
  856: 
  857: \ structural conditionals                              17dec92py
  858: 
  859: >CROSS
  860: : ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
  861: : sys?        ( sys -- sys )    dup 0= ?struc ;
  862: : >mark       ( -- sys )        T here  0 , H ;
  863: : >resolve    ( sys -- )        T here over - swap ! H ;
  864: : <resolve    ( sys -- )        T here - , H ;
  865: >TARGET
  866: 
  867: \ Structural Conditionals                              12dec92py
  868: 
  869: Cond: BUT       restrict? sys? swap ;Cond
  870: Cond: YET       restrict? sys? dup ;Cond
  871: 
  872: >CROSS
  873: Variable tleavings
  874: >TARGET
  875: 
  876: Cond: DONE   ( addr -- )  restrict? tleavings @
  877:       BEGIN  2dup u> 0=  WHILE  dup T @ H swap >resolve REPEAT
  878:       tleavings ! drop ;Cond
  879: 
  880: >CROSS
  881: : (leave  T here H tleavings @ T , H  tleavings ! ;
  882: >TARGET
  883: 
  884: Cond: LEAVE     restrict? compile branch (leave ;Cond
  885: Cond: ?LEAVE    restrict? compile 0=  compile ?branch (leave  ;Cond
  886: 
  887: \ Structural Conditionals                              12dec92py
  888: 
  889: Cond: AHEAD     restrict? compile branch >mark ;Cond
  890: Cond: IF        restrict? compile ?branch >mark ;Cond
  891: Cond: THEN      restrict? sys? dup T @ H ?struc >resolve ;Cond
  892: Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond
  893: 
  894: Cond: BEGIN     restrict? T here H ;Cond
  895: Cond: WHILE     restrict? sys? compile IF swap ;Cond
  896: Cond: AGAIN     restrict? sys? compile branch <resolve ;Cond
  897: Cond: UNTIL     restrict? sys? compile ?branch <resolve ;Cond
  898: Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond
  899: 
  900: Cond: CASE      restrict? 0 ;Cond
  901: Cond: OF        restrict? 1+ >r compile over compile = compile IF compile drop
  902:                 r> ;Cond
  903: Cond: ENDOF     restrict? >r compile ELSE r> ;Cond
  904: Cond: ENDCASE   restrict? compile drop 0 ?DO  compile THEN  LOOP ;Cond
  905: 
  906: \ Structural Conditionals                              12dec92py
  907: 
  908: Cond: DO        restrict? compile (do)   T here H ;Cond
  909: Cond: ?DO       restrict? compile (?do)  T (leave here H ;Cond
  910: Cond: FOR       restrict? compile (for)  T here H ;Cond
  911: 
  912: >CROSS
  913: : loop]   dup <resolve tcell - compile DONE compile unloop ;
  914: >TARGET
  915: 
  916: Cond: LOOP      restrict? sys? compile (loop)  loop] ;Cond
  917: Cond: +LOOP     restrict? sys? compile (+loop) loop] ;Cond
  918: Cond: NEXT      restrict? sys? compile (next)  loop] ;Cond
  919: 
  920: \ String words                                         23feb93py
  921: 
  922: : ,"            [char] " parse string, T align H ;
  923: 
  924: Cond: ."        restrict? compile (.")     T ," H ;Cond
  925: Cond: S"        restrict? compile (S")     T ," H ;Cond
  926: Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond
  927: 
  928: Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
  929: : IS            T ' >body ! H ;
  930: Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
  931: : TO            T ' >body ! H ;
  932: 
  933: \ LINKED ERR" ENV" 2ENV"                                18may93jaw
  934: 
  935: \ linked list primitive
  936: : linked        T here over @ A, swap ! H ;
  937: 
  938: : err"   s" ErrLink linked" evaluate T , H
  939:          [char] " parse string, T align H ;
  940: 
  941: : env"  [char] " parse s" EnvLink linked" evaluate
  942:         string, T align , H ;
  943: 
  944: : 2env" [char] " parse s" EnvLink linked" evaluate
  945:         here >r string, T align , , H
  946:         r> dup T c@ H 80 and swap T c! H ;
  947: 
  948: \ compile must be last                                 22feb93py
  949: 
  950: Cond: compile ( -- ) restrict? \ name
  951:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  952:       0> IF    gexecute
  953:          ELSE  dup >magic @ <imm> =
  954:                IF   gexecute
  955:                ELSE compile (compile) gexecute THEN THEN ;Cond
  956: 
  957: Cond: postpone ( -- ) restrict? \ name
  958:       bl word gfind dup 0= ABORT" CROSS: Can't compile"
  959:       0> IF    gexecute
  960:          ELSE  dup >magic @ <imm> =
  961:                IF   gexecute
  962:                ELSE compile (compile) gexecute THEN THEN ;Cond
  963: 
  964: >MINIMAL
  965: also minimal
  966: \ Usefull words                                        13feb93py
  967: 
  968: : KB  400 * ;
  969: 
  970: \ define new [IFDEF] and [IFUNDEF]                      20may93jaw
  971: 
  972: : defined? defined? ;
  973: : needed? needed? ;
  974: : doer? doer? ;
  975: 
  976: : [IFDEF] defined? postpone [IF] ;
  977: : [IFUNDEF] defined? 0= postpone [IF] ;
  978: 
  979: \ C: \- \+ Conditional Compiling                         09jun93jaw
  980: 
  981: : C: >in @ defined? 0=
  982:      IF    >in ! T : H
  983:      ELSE drop
  984:         BEGIN bl word dup c@
  985:               IF   count comment? s" ;" compare 0= ?EXIT
  986:               ELSE refill 0= ABORT" CROSS: Out of Input while C:"
  987:               THEN
  988:         AGAIN
  989:      THEN ;
  990: 
  991: also minimal
  992: 
  993: \G interprets the line if word is not defined
  994: : \- defined? IF postpone \ THEN ;
  995: 
  996: \G interprets the line if word is defined
  997: : \+ defined? 0= IF postpone \ THEN ;
  998: 
  999: Cond: \- \- ;Cond
 1000: Cond: \+ \+ ;Cond
 1001: 
 1002: : ?? bl word find IF execute ELSE drop 0 THEN ;
 1003: 
 1004: : needed:
 1005: \G defines ghost for words that we want to be compiled
 1006:   BEGIN >in @ bl word c@ WHILE >in ! ghost drop REPEAT drop ;
 1007: 
 1008: : [IF]   postpone [IF] ;
 1009: : [THEN] postpone [THEN] ;
 1010: : [ELSE] postpone [ELSE] ;
 1011: 
 1012: Cond: [IF]      [IF] ;Cond
 1013: Cond: [IFDEF]   [IFDEF] ;Cond
 1014: Cond: [IFUNDEF] [IFUNDEF] ;Cond
 1015: Cond: [THEN]    [THEN] ;Cond
 1016: Cond: [ELSE]    [ELSE] ;Cond
 1017: 
 1018: previous
 1019: 
 1020: \ save-cross                                           17mar93py
 1021: 
 1022: >CROSS
 1023: Create magic  s" Gforth10" here over allot swap move
 1024: 
 1025: char 1 bigendian + tcell + magic 7 + c!
 1026: 
 1027: : save-cross ( "image-name" "binary-name" -- )
 1028:   bl parse ." Saving to " 2dup type cr
 1029:   w/o bin create-file throw >r
 1030:   TNIL IF
 1031:       s" #! "   r@ write-file throw
 1032:       bl parse  r@ write-file throw
 1033:       s"  -i"   r@ write-file throw
 1034:       #lf       r@ emit-file throw
 1035:       r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
 1036:       ?do
 1037: 	  bl over emit-file throw
 1038:       loop
 1039:       drop
 1040:       magic 8       r@ write-file throw \ write magic
 1041:   ELSE
 1042:       bl parse 2drop
 1043:   THEN
 1044:   image @ there r@ write-file throw \ write image
 1045:   TNIL IF
 1046:       bit$  @ there 1- tcell>bit rshift 1+
 1047:                 r@ write-file throw \ write tags
 1048:   THEN
 1049:   r> close-file throw ;
 1050: 
 1051: \ words that should be in minimal
 1052: >MINIMAL
 1053: also minimal
 1054: 
 1055: bigendian Constant bigendian
 1056: : save-cross save-cross ;
 1057: : here there ;
 1058: also forth 
 1059: [IFDEF] Label : Label Label ; [THEN] 
 1060: [IFDEF] start-macros : start-macros start-macros ; [THEN]
 1061: previous
 1062: 
 1063: : + + ;
 1064: : or or ;
 1065: : 1- 1- ;
 1066: : - - ;
 1067: : 2* 2* ;
 1068: : * * ;
 1069: : / / ;
 1070: : dup dup ;
 1071: : over over ;
 1072: : swap swap ;
 1073: : rot rot ;
 1074: : drop drop ;
 1075: : =   = ;
 1076: : 0=   0= ;
 1077: : lshift lshift ;
 1078: : 2/ 2/ ;
 1079: : . . ;
 1080: : const ;
 1081: 
 1082: \ mach-file count included
 1083: 
 1084: : all-words    ['] false    IS skip? ;
 1085: : needed-words ['] needed?  IS skip? ;
 1086: : undef-words  ['] defined? IS skip? ;
 1087: 
 1088: : \  postpone \ ;  immediate
 1089: : \G T-\G ; immediate
 1090: : (  postpone ( ;  immediate
 1091: : include bl word count included ;
 1092: : .( [char] ) parse type ;
 1093: : cr cr ;
 1094: 
 1095: : times 0 ?DO dup T c, H LOOP drop ; \ used for space table creation
 1096: only forth also minimal definitions
 1097: 
 1098: \ cross-compiler words
 1099: 
 1100: : decimal       decimal ;
 1101: : hex           hex ;
 1102: 
 1103: : tudp          T tudp H ;
 1104: : tup           T tup H ;
 1105: 
 1106: : doc-off       false T to-doc H ! ;
 1107: : doc-on        true  T to-doc H ! ;
 1108: 
 1109: minimal
 1110: 
 1111: \ for debugging...
 1112: : order         order ;
 1113: : words         words ;
 1114: : .s            .s ;
 1115: 
 1116: : bye           bye ;
 1117: 
 1118: \ turnkey direction
 1119: : H forth ; immediate
 1120: : T minimal ; immediate
 1121: : G ghosts ; immediate
 1122: 
 1123: : turnkey  0 set-order also Target definitions
 1124:            also Minimal also ;
 1125: 
 1126: \ these ones are pefered:
 1127: 
 1128: : lock   turnkey ;
 1129: : unlock forth also cross ;
 1130: 
 1131: unlock definitions also minimal
 1132: : lock   lock ;
 1133: lock

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